US4704635A — Large capacity, large area video imaging sensor

Claim 1

Independent Claim 363 words

A scanner image tube comprising: a first electrode and a line connected thereto for carrying a video signal from said first electrode; a second electrode and a line connected thereto to establish a potential relative to said first electrode such as to cause charge carries to move in a predetermined direction; a first layer; a second layer; and means for providing a beam of irradiation which raster scans said second electrode at a distance therefrom; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said second electrode and said first layer; and wherein said first electrode comprises a first material which passes therethrough and into said first layer a pattern of image defining irradiation in a given spectral band; and wherein said second electrode comprises a second material which passes therethrough and into said second layer irradiation from said beam; and wherein said first layer and said second layer lie against each other at an interface region; and wherein said second layer comprises means for transporting and generating electrons to irradiation from said beam passing through said second electrode and striking said second layer, said generated charge carriers travelling toward the interface region whereat the carriers are blocked so as to become a uniformly charged surface layer; and wherein said first layer comprises means for generating charge carriers of opposite sign to the carriers generated in the second layer, in a pattern corresponding to the pattern of image-defining irradiation that passes through said first electrode and strikes said first layer, the pattern of these carrier travelling toward the interface to combine with stored carriers thereat to form an electronic charge image at the interface region; and wherein said charge carrier transporting and generating means provides sufficient carriers in response to the scanning of said second layer by said beam to recharge the interface and with charge balance maintained through the line connected to the second electrode, the video signal on said lines connected to either the first or second electrodes varying in amplitude over time the magnitude of recharging required for the portion of the interface subject to the scan.

Claim 2

Dependent Claim 363 words

A scanner image tube comprising: a first electrode and a line connected thereto for carrying a video signal from said first electrode; a second electrode and a line connected thereto to establish a potential relative to said first electrode such as to cause charge carries to move in a predetermined direction; a first layer; a second layer; and means for providing a beam of irradiation which raster scans said second electrode at a distance therefrom; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said second electrode and said first layer; and wherein said first electrode comprises a first material which passes therethrough and into said first layer a pattern of image defining irradiation in a given spectral band; and wherein said second electrode comprises a second material which passes therethrough and into said second layer irradiation from said beam; and wherein said first layer and said second layer lie against each other at an interface region; and wherein said second layer comprises means for transporting and generating electrons to irradiation from said beam passing through said second electrode and striking said second layer, said generated charge carriers travelling toward the interface region whereat the carriers are blocked so as to become a uniformly charged surface layer; and wherein said first layer comprises means for generating charge carriers of opposite sign to the carriers generated in the second layer, in a pattern corresponding to the pattern of image-defining irradiation that passes through said first electrode and strikes said first layer, the pattern of these carrier travelling toward the interface to combine with stored carriers thereat to form an electronic charge image at the interface region; and wherein said charge carrier transporting and generating means provides sufficient carriers in response to the scanning of said second layer by said beam to recharge the interface and with charge balance maintained through the line connected to the second electrode, the video signal on said lines connected to either the first or second electrodes varying in amplitude over time the magnitude of recharging required for the portion of the interface subject to the scan.

Claim 3

Dependent Claim 41 words

A scanner image tube according to claim 1, wherein said first layer can be selected to provide a positive charge flow (holes) or a negative charge flow (electrons) to deplete carriers stored at the interface and to form a charge image.

Claim 4

Dependent Claim 35 words

A scanner image tube according to claim 1, wherein said second layer can be selected to provide a positive charge carrier flow (holes) or a negative charge flow (electrons) to store charge at the interface.

Claim 5

Dependent Claim 43 words

A scanner image tube according to claim 3, wherein the interface surface can store either a positive charge or a negative charge dependant upon the sign of the transported charge carrier and the direction of carrier flow, determined by said second layer selection.

Claim 6

Dependent Claim 28 words

A scanner image tube according to claim 1, wherein said second electrode is biased through a resistor via a connection to a selected source of potential, including ground.

Claim 7

Dependent Claim 56 words

A scanner image tube according to claim 1 wherein said beam providing means generates a high velocity electron beam; and wherein said electron generating means comprises a charge multiplication layer offering gain of unity or more, such that one or more electrons are generated for each electron from said electron beam that strikes said second layer.

Claim 8

Dependent Claim 33 words

A scanner image tube according to claim 6 wherein said beam providing means generates an electron beam of at least sufficient energy to cause charge multiplication, determined by the magnitude of gain required.

Claim 9

Dependent Claim 41 words

A scanner image tube according to claim 6 wherein said charge multiplication layer comprises an electron bombardment induced conductivity (EBIC) layer; and wherein said electron beam has sufficient energy to cause the magnitude of charge multiplication required in said EBIC layer.

Claim 10

Dependent Claim 31 words

A scanner image tube according to claim 6 wherein said charge multiplication comprises a material that multiplies charge by a gain factor sufficiently large to charge and recharge the interface layer.

Claim 11

Dependent Claim 18 words

A scanner image tube according to claim 6 wherein said charge multiplication layer comprises a channel multiplier layer.

Claim 12

Dependent Claim 20 words

A scanner image tube according to claim 6 wherein said charge multiplication layer comprises a secondary electron conductivity (SEC) material.

Claim 13

Dependent Claim 16 words

A scanner image tube according to claim 6 wherein said charge multiplication layer comprises semiconducting silicon.

Claim 14

Dependent Claim 92 words

A scanner image tube according to claim 1, wherein said second electrode is subject to a floating bias; wherein the floating bias is established through the joint action of low velocity flood gun electrons, photoconductive current flow through the first layer induced with bias lighting, bias voltage on the first electrode and the super high velocity scanning beam; wherein the bias lighting can be transmitted to the photoconductor through the first transparent electrode or through the second electrode and the second layer when in combination they are made either translucent or transparent.

Claim 15

Dependent Claim 95 words

A scanner image tube according to claim 1, wherein said second conducting surface electrode is removed and a floating potential established on the exposed second surface layer; wherein the floating potential is established through the joint action of low velocity flood gun electrons, photoconductive current flow through the first layer induced with bias lighting, bias voltage on the first electrode and the super high velocity scanning beam; wherein the bias lighting can be transmitted to the photoconductor through the first transparent electrode or through the second layer when it is made either translucent or transparent.

Claim 16

Dependent Claim 72 words

A scanner image tube according to claim 1 further comprising: a third layer, said first electrode being sandwiched between said first layer and said third layer; wherein said third layer converts an incident pattern in one form of radiation into the image-defining pattern of another form of radiation which passes through said first electrode to (a) strike said first layer and (b) generate holes in a pattern corresponding to the incident pattern.

Claim 17

Dependent Claim 53 words

A scanner image tube according to claim 15 wherein the incident pattern is in the form of X-radiation; and wherein said third layer comprises an X-ray sensor such as cesium iodide which (a) absorbs the X-radiation and (b) generates light photons to form the pattern of image-defining radiation in said given spectral band.

Claim 18

Dependent Claim 61 words

A scanner image tube according to claim 7 or claim 16 wherein said first electrode comprises a plurality of electrode stripes disposed substantially parallel to the direction of electron beam line scan; said electrode stripes being substantially parallel to one another and placed side by side, said first electrode stripes thereby limiting the effective readout capacity in the scanner image tube.

Claim 19

Dependent Claim 32 words

A scanner image tube according to claim 1 wherein said electrode comprises at least one electrode stripe said first electrode stripe thereby limiting the effective readout capacity in the scanner image tube.

Claim 20

Dependent Claim 45 words

A scanner image tube according to claim 18 wherein said first electrode is positioned parallel to and displaced from said second electrode; and means for biasing said first electrode relative to said second electrode such that electronic carriers migrate from said one toward the other.

Claim 21

Dependent Claim 35 words

A scanner image tube according to claim 19 wherein said first electrode is at a positive voltage relative to said second electrode whereby the scanned charge is stored on said first layer at the interface.

Claim 22

Dependent Claim 22 words

A scanner image tube according to claim 19 wherein said first electrode is at a negative voltage relative to said second electrode.

Claim 23

Dependent Claim 26 words

A scanner image tube according to claim 18 or 19 or 20 or 21 wherein said stripe electrode or electrodes can be one raster line thick.

Claim 24

Dependent Claim 17 words

A scanner image tube according to claim 18 wherein said stripe signal electrode is a straight line.

Claim 25

Dependent Claim 34 words

A scanner image tube according to claim 1 wherein the center of the scan of said beam lies in the simplest example, at approximately a 0° angle relative to the direction of incident radiation.

Claim 26

Dependent Claim 17 words

A scanner image tube according to claim 1 or 17 wherein a single scanning beam is employed.

Claim 27

Dependent Claim 33 words

A scanner image tube according to claim 1 wherein multiple scanning beams are employed each scanning a different stripe area of said first electrode, and a distinct amplifier associated with each said stripe.

Claim 28

Dependent Claim 25 words

A scanner image tube according to claim 1 wherein one of said electrodes comprises a plurality of electrode stripes deposited parallel to the raster lines.

Claim 29

Dependent Claim 18 words

A scanner image tube according to claim 27 wherein said first electrode comprises a plurality of parallel stripes.

Claim 30

Dependent Claim 24 words

A scanner image tube according to claim 27 wherein said second electrode comprises a plurality of parallel stripes also parallel to the raster lines.

Claim 31

Dependent Claim 18 words

A scanner image tube according to claim 27 wherein both said electrodes comprise a plurality of said stripes.

Claim 32

Dependent Claim 31 words

A scanner image tube according to claim 17 wherein said each electrode stripe comprises for example a stripe of approximately 24 microns in width, said stripes being separated by 1 micron.

Claim 33

Dependent Claim 29 words

A scanner image tube according to claim 31 wherein said first electrode extends over an area of approximately 16 inches by 16 inches, each stripe being 16 inches long.

Claim 34

Dependent Claim 37 words

A scanner image tube according to claim 1 wherein said beam comprises a laser beam; and wherein said second layer comprises a photoconductive layer which generates at least electrons when struck by irradiation from said laser beam.

Claim 35

Dependent Claim 182 words

A scanner image tube comprising: a first electrode; a second electrode at a negative potential relative to said first electrode; a solid-state first layer of high resistivity; a charge multiplication second layer of high resistivity; means for raster scanning an electron beam of sufficient energy to cause charge multiplication in the second layer; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said first layer and said second electrode; and wherein said raster scanning means directs high velocity electrons into said second layer through said second electrode, said second layer generating and conveying a greater number of electrons toward the interface between said first layer and said second layer than the number of electrons from said scanning means that strike said second layer; and wherein when said first electrode is exposed to a pattern of image-defining radiation which strikes said first layer, said first layer conveys a pattern of holes to the interface region of said first layer and said second layer analogous to the pattern of image-defining radiation.

Claim 36

Dependent Claim 182 words

A scanner image tube comprising: a first electrode; a second electrode at a negative potential relative to said first electrode; a solid-state first layer of high resistivity; a charge multiplication second layer of high resistivity; means for raster scanning an electron beam of sufficient energy to cause charge multiplication in the second layer; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said first layer and said second electrode; and wherein said raster scanning means directs high velocity electrons into said second layer through said second electrode, said second layer generating and conveying a greater number of electrons toward the interface between said first layer and said second layer than the number of electrons from said scanning means that strike said second layer; and wherein when said first electrode is exposed to a pattern of image-defining radiation which strikes said first layer, said first layer conveys a pattern of holes to the interface region of said first layer and said second layer analogous to the pattern of image-defining radiation.

Claim 37

Dependent Claim 21 words

A scanner image tube according to claim 34 wherein said charge multiplication layer comprises means for reducing beam resistance and lag.

Claim 38

Dependent Claim 56 words

A scanner image tube according to claim 35 wherein said charge multiplication layer comprises a material subject to avalanche breakdown, where struck by the high velocity electrons, said means providing enhanced reduction of beam resistance and lag reduction in response to avalanche breakdown of said charge multiplication layer between said second electrode and the interface region.

Claim 39

Dependent Claim 63 words

A scanner image tube according to claim 35 wherein the holes conveyed to the interface combine with the electrons conveyed thereto through said second layer; and wherein a recharge ratio of (a) the number of electrons conveyed to the interface through said charge multiplication layer to (b) the number of electrons which combine with holes at the interface is substantially greater than one.

Claim 40

Dependent Claim 42 words

A scanner image tube according to claim 25 wherein said charge multiplication layer when struck by electrons from the scanning means conveys sufficient electrons resulting from a recharge ratio to be broadly in the range of unity to in excess of 10,000.

Claim 41

Dependent Claim 83 words

A scanner image tube according to claim 38 further comprising: a third layer, said first electrode being sandwiched between said first layer and said third layer; said third layer converting an input image-representing pattern of X-radiation which impinges thereon into a corresponding incident pattern of photons which pass through said first electrode to strike said first layer; said first layer generating holes which travel to said interface and electrons which travel to said first electrode in response to photons striking said first layer.

Claim 42

Dependent Claim 208 words

A scanner image tube comprising: a first electrode; a second electrode, said first electrode being at a predetermined potential relative thereto; a first solid state layer which generates electrons and holes when struck by radiation; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said first layer and said second electrode, said first layer lying against said second layer to form an interface region; and raster scanning means for directing a radiation beam into said second layer through said second electrode, said second layer being struck by the beam electrons and causing current flow in an amount depending on imaging storage requirements, with electrons conveyed toward the interface region for storage thereat and with charge neutrality maintained in the second layer through the second electrode and connecting resistor; the electrons stored at the interface region forming an electron layer displaced from said second electrode, the electrons of said electron layer being combinable with holes generated in said first layer in response to radiation passing through said first electrode into said first layer; the combining of holes from said first layer with electrons from said second layer at the interface region forming an electronic image thereat.

Claim 43

Dependent Claim 208 words

A scanner image tube comprising: a first electrode; a second electrode, said first electrode being at a predetermined potential relative thereto; a first solid state layer which generates electrons and holes when struck by radiation; wherein said first layer is sandwiched between said first electrode and said second layer; and wherein said second layer is sandwiched between said first layer and said second electrode, said first layer lying against said second layer to form an interface region; and raster scanning means for directing a radiation beam into said second layer through said second electrode, said second layer being struck by the beam electrons and causing current flow in an amount depending on imaging storage requirements, with electrons conveyed toward the interface region for storage thereat and with charge neutrality maintained in the second layer through the second electrode and connecting resistor; the electrons stored at the interface region forming an electron layer displaced from said second electrode, the electrons of said electron layer being combinable with holes generated in said first layer in response to radiation passing through said first electrode into said first layer; the combining of holes from said first layer with electrons from said second layer at the interface region forming an electronic image thereat.

Claim 44

Dependent Claim 81 words

A scanner image tube according to claim 40 wherein said second layer is subject to local electronic breakdown, where struck by the beam; and wherein the resistance provided by said second layer to electrons being conveyed to a given pixel of the interface reduces with increased electron generation between said second electrode and the given pixel; the resistance provided by said second layer approaching zero along direct paths between said second electrode and a pixel which have undergone total electronic breakdown.

Claim 45

Dependent Claim 63 words

A scanner image tube according to claim 41 wherein (a) the number of electrons conveyed to any pixel at the interface region when said second layer is struck by the beam and (b) the maximum number of electrons combinable with holes at said any pixel at the interface region are in a recharge ratio of at least unity to in excess of 10,000.

Claim 46

Dependent Claim 82 words

A scanner image tube according to claim 41 further comprising: a third layer, said first electrode being sandwiched between said first layer and third layer; said third layer converting an incident pattern of X-radiation which impinges thereon into a corresponding image-defining pattern of photons which pass through said first electrode to strike said first layer, said first layer generating holes which travel to the interface region and electrons which travel to said first electrode in response to photons striking said first layer.

Claim 47

Dependent Claim 89 words

A scanner image tube according to claim 41 wherein the scanner image tube responds to irradiation from an object, which irradiation passes through said first electrode and strikes said first layer; and wherein the scanner image tube further comprises: intensifier means, interposed between the object and the interface region, for increasing the number of generated holes combinable with electrons at the interface for a given level of radiation from the object; said recharge ratio being at least unity to in excess of 10,000 for each pixel of the interface.

Claim 48

Dependent Claim 17 words

A scanner image tube according to claim 41 wherein said first layer is a thin crystalline layer.

Claim 49

Dependent Claim 40 words

A scanner image tube according to claim 41 wherein first layer generates electron-hole pairs, the electrons from which drift to said first electrode; and wherein said second layer generates electron-hole pairs, the holes from which drift to said second electrode.

Claim 50

Independent Claim 250 words

A method of producing with a scanner image tube a video signal corresponding to the image of an object, the method comprising the steps of: sandwiching a first layer between a first electrode and a second layer; sandwiching the second layer between the first layer and a second electrode; applying an electric field between the two electrodes; exposing the first electrode to irradiation limited to a first spectral band corresponding to the image of the object wherein the first electrode is transparent to irradiation in the first spectral band but not in a second spectral band; scanning the second electrode with an optical beam of irradiation limited to the second spectral band distinct from the first spectral band wherein the second electrode is transparent to irradiation in the second spectral band but not in the first spectral band; and forming an electronic image at the interface region between the first layer and the second layer, said forming step comprising the steps of: selecting the second layer of a photoconductive material which generates electrons in the second layer when scanned with the beam, the electrons drifting to the interface under the influence of the electric field to promote a uniformly charged electron layer at the interface; and selecting the first layer of a material which generates holes therein when irradiation in the first spectral band impinges thereon through the first electrode, the holes drifting to the interface under the influence of the electrical field to combine with electrons at the interface.

Claim 51

Independent Claim 250 words

A method of producing with a scanner image tube a video signal corresponding to the image of an object, the method comprising the steps of: sandwiching a first layer between a first electrode and a second layer; sandwiching the second layer between the first layer and a second electrode; applying an electric field between the two electrodes; exposing the first electrode to irradiation limited to a first spectral band corresponding to the image of the object wherein the first electrode is transparent to irradiation in the first spectral band but not in a second spectral band; scanning the second electrode with an optical beam of irradiation limited to the second spectral band distinct from the first spectral band wherein the second electrode is transparent to irradiation in the second spectral band but not in the first spectral band; and forming an electronic image at the interface region between the first layer and the second layer, said forming step comprising the steps of: selecting the second layer of a photoconductive material which generates electrons in the second layer when scanned with the beam, the electrons drifting to the interface under the influence of the electric field to promote a uniformly charged electron layer at the interface; and selecting the first layer of a material which generates holes therein when irradiation in the first spectral band impinges thereon through the first electrode, the holes drifting to the interface under the influence of the electrical field to combine with electrons at the interface.

Claim 52

Dependent Claim 29 words

A method according to claim 47 comprising the further step of: reading out surges of electron flow as the optical beam is scanned to provide a video signal output.

Claim 53

Dependent Claim 40 words

A method according to claim 47 comprising the further step of: supplying electrons from said second layer to recharge the interface region with electrons, responsive to said scanning of the beam and the generating of electrons in said second layer.

Claim 54

Dependent Claim 27 words

A method according to claim 49 comprising the further step of: draining excess electrons out of the second layer through the line connected to the second electrode.

Claim 55

Dependent Claim 35 words

A method according to claim 49 or 50 wherein said supplying step includes the step of supplying electrons to the interface region to promote a fixed uniform charge density and a fixed equilibrium voltage thereat.

Claim 56

Dependent Claim 33 words

A method according to claim 47 wherein said selection of material for said second layer includes the step of: selecting a material that undergoes avalanche breakdown locally where subjected to the scanning beam.

Claim 57

Dependent Claim 69 words

A method according to claim 47 wherein selecting the second layer material comprises the step of: selecting a material of high resistivity subject to local avalanche breakdown; wherein the resistance to the flow of generated electrons along a path through the second layer to the interface, where the path has undergone avalanche breakdown, approaches zero; and wherein the high resistivity of the second layer inhibits lateral spread of charge.

Claim 58

Dependent Claim 161 words

A scanner image tube comprising: a vidicon-type tube including: (a) means for providing a low velocity beam; (b) a sensor-target having a surface of a given area; and (c) a plurality of stripe signal electrodes transparent to incident radiation arranged side-by-side spanning the area of the sensor-target surface, said stripe signal electrodes being substantially aligned with the direction of raster line scan, the width of the stripe signal electrodes being at least equal to the width of a raster line, said stripe signal electrodes having narrow widths which represent low distributed and target capacitance relative to single element electrodes; a plurality of preamplifiers, each preamplifier being connected to a respective one of said stripe signal electrodes; and a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing in memory inputs corresponding to each raster line scanned along a given stripe signal electrode.

Claim 59

Dependent Claim 161 words

A scanner image tube comprising: a vidicon-type tube including: (a) means for providing a low velocity beam; (b) a sensor-target having a surface of a given area; and (c) a plurality of stripe signal electrodes transparent to incident radiation arranged side-by-side spanning the area of the sensor-target surface, said stripe signal electrodes being substantially aligned with the direction of raster line scan, the width of the stripe signal electrodes being at least equal to the width of a raster line, said stripe signal electrodes having narrow widths which represent low distributed and target capacitance relative to single element electrodes; a plurality of preamplifiers, each preamplifier being connected to a respective one of said stripe signal electrodes; and a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing in memory inputs corresponding to each raster line scanned along a given stripe signal electrode.

Claim 60

Dependent Claim 20 words

A scanner image tube according to claim 54 further comprising: analog signal multiplexing to reduce the number of preamplifiers necessary.

Claim 61

Dependent Claim 39 words

A scanner image tube according to claim 54 further comprising: means for reading out simultaneously in parallel the stored inputs corresponding to all stripe signal electrodes when the entire target-sensor surface is exposed to beam radiation at one time.

Claim 62

Dependent Claim 27 words

A scanner image tube according to claim 54 wherein said incident radiation comprises at least one fan beam oriented to project radiation parallel to the electrode stripes.

Claim 63

Dependent Claim 24 words

A scanner image tube according to claim 57 wherein at least two fan beams scan simultaneously, reducing the time required to scan a raster.

Claim 64

Dependent Claim 43 words

A scanner image tube according to claim 57 further comprising: means for translating said fan beam from one stripe signal electrode to another; and means for serially reading out the stored inputs for successive stripe signal electrodes as the fan beam is translated.

Claim 65

Dependent Claim 17 words

A scanner image tube according to claim 54 wherein the stripe signal electrodes are of equal width.

Claim 66

Dependent Claim 33 words

A scanner image tube according to claim 57 further comprising: means for erasing residual imagery and scatter from prior exposures, said erasing means including means for scanning raster lines before fan beam exposure.

Claim 67

Dependent Claim 50 words

A scanner image tube according to claim 54 or 57 or 61 further comprising: means for selectively bias switching each of said stripe signal electrodes, thereby limiting sensitivity to stripes exposed to fan beam readiation while all others are not responsive and do not record any direct or scattered radiation.

Claim 68

Dependent Claim 117 words

A scanner image tube comprising: a displaced electron layer sensor-target (DELST) which includes stripe signal electrodes, transparent to incident radiation, said stripe signal electrodes being arranged side by side to span the sensor-target surface area, said stripes being sufficiently wide to be scanned by at least one raster line whose length is parallel to said stripe signal electrodes, each stripe width being defined so that the area of each stripe signal electrode is sufficiently small to minimize excessive operational capacity; a high velocity beam for scanning said DELST, said high velocity beam and said DELST cooperating to avoid large beam impedance associated with low velocity beam, and charge redistribution effects associated with high velocity vidicon type tubes.

Claim 69

Dependent Claim 117 words

A scanner image tube comprising: a displaced electron layer sensor-target (DELST) which includes stripe signal electrodes, transparent to incident radiation, said stripe signal electrodes being arranged side by side to span the sensor-target surface area, said stripes being sufficiently wide to be scanned by at least one raster line whose length is parallel to said stripe signal electrodes, each stripe width being defined so that the area of each stripe signal electrode is sufficiently small to minimize excessive operational capacity; a high velocity beam for scanning said DELST, said high velocity beam and said DELST cooperating to avoid large beam impedance associated with low velocity beam, and charge redistribution effects associated with high velocity vidicon type tubes.

Claim 70

Dependent Claim 45 words

A scanner image tube according to claim 63 wherein the DELST includes a photoconductive layer for the sensor-target which is responsive to incident radiation, said photoconductive layer providing substantial photoconductive gain so as to boost the signal layer to as much as hundreds of micoramperes.

Claim 71

Dependent Claim 20 words

A scanner image tube according to claim 64 further comprising: forefront intensifier means for adding gain to the signal level.

Claim 72

Dependent Claim 34 words

A scanner image tube according to claim 63 further comprising: electron multiplier means for producing high values of beam current within the layer while using a relatively small current scanner beam outside the layer.

Claim 73

Dependent Claim 31 words

A scanner image tube according to claim 63 further comprising: a plurality of preamplifiers, each preamplifier connected to receive a video signal from a respective one of said stripe signal electrodes.

Claim 74

Dependent Claim 54 words

A scanner image tube according to claim 67 further comprising: a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing, in memory, inputs corresponding to each raster line scanned along a given stripe signal electrode.

Claim 75

Dependent Claim 39 words

A scanner image tube according to claim 63 further comprising: means for reading out simultaneously in parallel the stored inputs corresponding to all stripe signal electrodes when the entire target-sensor surface is exposed to beam radiation at one time.

Claim 76

Dependent Claim 51 words

A scanner image tube according to claim 63 further comprising: at least one fan beam; means for translating said at least one fan beam from one stripe signal electrode to another; and means for serially reading out the stored inputs for successive stripe signal electrodes as the fan beam is translated.

Claim 77

Dependent Claim 30 words

A scanner image tube according to claim 63 wherein said displaced electron layer stores a formed image thereon from which a video signal is generated during scanning by said beam.

Claim 78

Dependent Claim 33 words

A scanner image tube according to claim 63 further comprising: means for erasing residual imagery and scatter from prior exposures, said erasing means including means for scanning raster lines before fan beam exposure.

Claim 79

Dependent Claim 32 words

A scanner image tube according to claim 72 further comprising: means for bias switching so that only the DELST stripe exposed directly by the fan beam is responsive to the incident radiation.

Claim 80

Dependent Claim 119 words

A scanner image tube comprising: a displaced electron layer sensor-target (DELST) which includes at least one stripe signal electrode, transparent to incident radiation, said stripe signal electrodes being arranged side by side to span the sensor-target surface area, said stripes being sufficiently wide to be scanned by at least one raster line whose length is parallel to said stripe signal electrodes, each stripe width being defined so that the area of each stripe signal electrode is sufficiently small to minimize excessive operational capacity; an optical beam for scanning said DELST, said optical beam and said DELST cooperating to avoid large beam impedance associated with low velocity beam and charge redistribution effects associated with high velocity beam vidicon type tubes.

Claim 81

Dependent Claim 119 words

A scanner image tube comprising: a displaced electron layer sensor-target (DELST) which includes at least one stripe signal electrode, transparent to incident radiation, said stripe signal electrodes being arranged side by side to span the sensor-target surface area, said stripes being sufficiently wide to be scanned by at least one raster line whose length is parallel to said stripe signal electrodes, each stripe width being defined so that the area of each stripe signal electrode is sufficiently small to minimize excessive operational capacity; an optical beam for scanning said DELST, said optical beam and said DELST cooperating to avoid large beam impedance associated with low velocity beam and charge redistribution effects associated with high velocity beam vidicon type tubes.

Claim 82

Dependent Claim 18 words

A scanner image tube according to claim 74 wherein said optical beam is a laser beam raster scanner.

Claim 83

Dependent Claim 32 words

A scanner image tube according to claim 74 further comprising: a plurality of preamplifiers, each preamplifier being connected to receive a video signal from a respective one of said stripe signal electrodes.

Claim 84

Dependent Claim 54 words

A scanner image tube according to claim 76 further comprising: a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing in memory inputs corresponding to each reaster line scanned along a given stripe signal electrode.

Claim 85

Dependent Claim 40 words

A scanner image tube according to claim 74 further comprising: means for reading out simultaneously in parallel the stored inputs corresponding to all stripe signal electrodes when the entire target-sensor surface is exposed to beam radiation at the same time.

Claim 86

Dependent Claim 52 words

A scanner image tube according to claim 74 further comprising: at least one fan beam; means for translating said at least one fan beam from one stripe signal electrode to another; and means for serially reading out the stored inputs for successive stripe signal electrodes responsive to the fan beam being translated.

Claim 87

Dependent Claim 33 words

A scanner image tube according to claim 74 further comprising: means for erasing residual imagery and scatter from prior exposures, said erasing means including means for scanning raster lines before fan beam exposure.

Claim 88

Dependent Claim 33 words

A scanner image tube according to claim 80 further comprising: means for bias switching so that only the DELST stripe exposed directly by the fan beam is responsive to the fan beams radiation.

Claim 89

Dependent Claim 60 words

A scanner image tube according to claim 74 said DELST further comprising: a photoconductive layer which transforms the optical beam into a high value electron current beam within said photoconductive layer; the scanning by said optical beam resulting in the generation of a video signal corresponding to the charges stored at the displaced electron layer which represent a formed image.

Claim 90

Dependent Claim 161 words

A scanner image tube comprising: a video-type tube including: (a) means for providing a high velocity beam; (b) a sensor-target having a surface of a given area; and (c) a plurality of stripe signal electrodes transparent to incident radiation arranged side-by-side spannning the area of the sensor-target surface, said stripe signal electrodes being substantailly aligned with the direction of raster line scan, the width of the stripe signal electrodes being at least equal to the width of a raster line, said stripe signal electrodes having narrow widths which represent low distributed and target capacitance relative to single element electrodes; a plurality of preamplifiers, each preamplifer being connected to a respective one of said stripe signal electrodes; and a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing in memory inputs corresponding to each raster line scanned along a given stripe signal electrode.

Claim 91

Dependent Claim 161 words

A scanner image tube comprising: a video-type tube including: (a) means for providing a high velocity beam; (b) a sensor-target having a surface of a given area; and (c) a plurality of stripe signal electrodes transparent to incident radiation arranged side-by-side spannning the area of the sensor-target surface, said stripe signal electrodes being substantailly aligned with the direction of raster line scan, the width of the stripe signal electrodes being at least equal to the width of a raster line, said stripe signal electrodes having narrow widths which represent low distributed and target capacitance relative to single element electrodes; a plurality of preamplifiers, each preamplifer being connected to a respective one of said stripe signal electrodes; and a plurality of storage elements, each storage element being connected to receive input from a respective one of said preamplifiers and each storage element including means for separately storing in memory inputs corresponding to each raster line scanned along a given stripe signal electrode.

Claim 92

Dependent Claim 37 words

A scanner image tube according to claim 80 or 83 further comprising: means for reducing the potential of a stripe being scanned relative to adjacent stripes whereby some secondary charge carriers are diverted to said adjacent stripes.

Claim 93

Dependent Claim 42 words

A scanner image tube according to claim 84 wherein said tube has a collector grid, said collector grid being located and having a potential relative to said scanned stripe and that some of said secondary charge carriers are diverted to said grid.

Claim 94

Dependent Claim 48 words

A scanner image tube according to claim 83 further comprising: at least one fan beam; means for translating said fan beam from one stripe signal electrode to another; and means for serially reading out the stored inputs for successive stripe signal electrodes as the fan beam is translated.

Claim 95

Dependent Claim 19 words

A scanner image tube according to claim 85 further comprising: means for scanning raster lines before fan beam exposure.

Claim 96

Dependent Claim 32 words

A scanner image tube according to claim 87 further comprising: means for making adjacent stripe sensors insensitive through removal of the potential difference across a sensor when both its electrodes comprise stripes.

Claim 97

Dependent Claim 217 words

A scanner imager comprising: a first electrode; a second electrode, said first electrode being at a specified potential relative to; a third photoemissive-sensor layer for generating electrons when struck by radiation; a first layer comprising a channel multiplier having an input surface in contact with the third photoemissive-sensor layer, said third layer being adjacent to and in electrical contact with the first electrode, said third layer being sandwiched between said first layer and said first electrode, said first layer being sandwiched between said third layer and said second layer, said second layer being sandwiched between said first layer and said second electrode, with said first layer lying against said second layer to form an interface region; said raster scanning means directing the radiation beam into said second layer through said second electrode, said second layer being struck by the beam generating charge carriers which migrate to the interface whereby a positive charge is formed at the interface and is displaced from the second electrode, and in position to be discharged by electrons, generated in said third and first layers respectively, in response to imaging radiation passing through the first electrode into said third layer, and causing the formation of an electronic image at the interface, said raster scanning means generating a video signal on recharging the interface.

Claim 98

Dependent Claim 217 words

A scanner imager comprising: a first electrode; a second electrode, said first electrode being at a specified potential relative to; a third photoemissive-sensor layer for generating electrons when struck by radiation; a first layer comprising a channel multiplier having an input surface in contact with the third photoemissive-sensor layer, said third layer being adjacent to and in electrical contact with the first electrode, said third layer being sandwiched between said first layer and said first electrode, said first layer being sandwiched between said third layer and said second layer, said second layer being sandwiched between said first layer and said second electrode, with said first layer lying against said second layer to form an interface region; said raster scanning means directing the radiation beam into said second layer through said second electrode, said second layer being struck by the beam generating charge carriers which migrate to the interface whereby a positive charge is formed at the interface and is displaced from the second electrode, and in position to be discharged by electrons, generated in said third and first layers respectively, in response to imaging radiation passing through the first electrode into said third layer, and causing the formation of an electronic image at the interface, said raster scanning means generating a video signal on recharging the interface.

Claim 99

Dependent Claim 23 words

The image scanner according to claim 1 further comprising a channel multiplier located between one of said layers and one of said electrodes.

Claim 100

Dependent Claim 29 words

The image scanner according to claim 1 or claim 90 further comprising means for varying the gain of said image scanner by selectively varying the potential across said electrodes.

Claim 101

Dependent Claim 175 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer devoid of any second transparent conducting electrode, a super high velocity beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the exposed surface of the second layer and to establish a floating potential; a bias light positioned in front to illuminate the photoconductive first layer through the first electrode or in the rear to illuminate the first layer through a transparent or translucent multiplying layer; a means for the scanning beam, bias light and flood gun to operate in combination to establish the storage charge at the interface surface and an equilibrium potential difference between the first and second layers; a means for minimizing noise inducing capacity to the preamplifier, wherein the charge stored on any pixel of the second layer surface is available for signal generation during the high velocity beam scan; a means for sequencing the process of charge storage, exposure and video signal generation.

Claim 102

Dependent Claim 175 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer devoid of any second transparent conducting electrode, a super high velocity beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the exposed surface of the second layer and to establish a floating potential; a bias light positioned in front to illuminate the photoconductive first layer through the first electrode or in the rear to illuminate the first layer through a transparent or translucent multiplying layer; a means for the scanning beam, bias light and flood gun to operate in combination to establish the storage charge at the interface surface and an equilibrium potential difference between the first and second layers; a means for minimizing noise inducing capacity to the preamplifier, wherein the charge stored on any pixel of the second layer surface is available for signal generation during the high velocity beam scan; a means for sequencing the process of charge storage, exposure and video signal generation.

Claim 103

Dependent Claim 35 words

A scanner image tube according to claim 92 operating in a pulsed mode, wherein the exposure, bias light, flood gun and scanner are pulsed to operate in any sequence needed for a particular imaging requirement.

Claim 104

Dependent Claim 31 words

A scanner image tube according to claim 92 operating in a continuous mode of operation, wherein the flood beam, bias light, scanning beam and exposure are in operation simultaneously and continuously.

Claim 105

Dependent Claim 23 words

A scanner image tube according to claim 92 structured with the first electrode divided into stripes to further minimize capacity when applications warrent.

Claim 106

Dependent Claim 180 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer with a second transparent conducting electrode, a high velocity beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the second electrode and to establish a floating potential; a bias light positioned in front to illuminate the photoconductive first layer with light passing through the transparent first electrode or positioned in the rear to illuminate the photoconductive first layer with light passing through a transparent or translucent second electrode and multiplying layer; a means for the scanning beam, bias light and the flood gun to operate in combination to establish the storage charge at the interface surface; a means for the scanning beam, bias light and the flood gun to operate in combination to establish an equilibrium potential difference between the first and second electrodes; a means for reducing noise inducing capacity to the preamplifier while permitting charge stored on the second electrode to be shared by pixels during scanning for signal generation.

Claim 107

Dependent Claim 180 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer with a second transparent conducting electrode, a high velocity beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the second electrode and to establish a floating potential; a bias light positioned in front to illuminate the photoconductive first layer with light passing through the transparent first electrode or positioned in the rear to illuminate the photoconductive first layer with light passing through a transparent or translucent second electrode and multiplying layer; a means for the scanning beam, bias light and the flood gun to operate in combination to establish the storage charge at the interface surface; a means for the scanning beam, bias light and the flood gun to operate in combination to establish an equilibrium potential difference between the first and second electrodes; a means for reducing noise inducing capacity to the preamplifier while permitting charge stored on the second electrode to be shared by pixels during scanning for signal generation.

Claim 108

Dependent Claim 32 words

A DELST image tube according to claim 96 operating in a pulsed mode wherein the scanner, bias light and flood gun can operate in any sequence as required by the imaging procedure.

Claim 109

Dependent Claim 32 words

A DELST image tube according to claim 96 operating in a continuous mode for real time imaging wherein the scanner beam, bias light and flood gun are in operation simultaneously and continuously.

Claim 110

Dependent Claim 23 words

A scanner image tube according to claim 96 structured with the first electrode divided into stripes to further minimize capacity when applications warent.

Claim 111

Dependent Claim 53 words

A scanner image tube according to claim 96, where the conducting electrode is extended outside the scanned raster area for non-iteractive flood beam and scanner beam operation, where the flood beam electrons are trained on the conducting electrode without intruding into sphere of electron optics governing the performance of the scanning electron beam.

Claim 112

Dependent Claim 149 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation, a photoconductive first layer responsive to imaging radiation, a photocondutive second layer devoid of any second transparent electrode and respnonsive to a laser beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the exposed surface of the second layer; a bias light positioned to illuminate the first layer through the transparent first electrode or positioned to illuminate the first layer with selected radiation able to pass through the photoconductive second layer and absorbed by the first layer; a means for scanning beam, bias light and flood beam to operate in combination to establish the storage charge at the interface surface and the equilibrium potential difference between the first electrode and the exposed surface of the second layer; a means for minimizing noise inducing capacity to the preamplifier.

Claim 113

Dependent Claim 149 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation, a photoconductive first layer responsive to imaging radiation, a photocondutive second layer devoid of any second transparent electrode and respnonsive to a laser beam for scanning said DELST; a flood gun to provide a flow of electrons for charging the exposed surface of the second layer; a bias light positioned to illuminate the first layer through the transparent first electrode or positioned to illuminate the first layer with selected radiation able to pass through the photoconductive second layer and absorbed by the first layer; a means for scanning beam, bias light and flood beam to operate in combination to establish the storage charge at the interface surface and the equilibrium potential difference between the first electrode and the exposed surface of the second layer; a means for minimizing noise inducing capacity to the preamplifier.

Claim 114

Dependent Claim 59 words

A DELST vacuum tube according to claim 101 where the tube is designed to include the flood gun and to contain windows transparent to the laser and bias light radiation, and positioned to place the flood gun so as not to interfere with the optical path of the laser and flood beam radiation coming from outside the vacuum tube.

Claim 115

Dependent Claim 34 words

A DELST image tube according to claim 101 operating in a pulsed mode, wherein the flood gun, bias light, exposure and the scanner are pulsed in a sequence as needed for an imaging requirement.

Claim 116

Dependent Claim 29 words

A DELST image tube according to claim 101 operating in a continuous mode, wherein the flood beam, bias light, scanning beam and exposure are in operation simultaneously and continuously.

Claim 117

Dependent Claim 23 words

A DELST image tube according to claim 101 structured with the first electrode divided into stripes to further minimize capacity when applications warrent.

Claim 118

Dependent Claim 184 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation, a photoconductive first layer responsive to imaging radiation, a second photoconductive layer responsive to laser beam radiation and supporting a second conducting electrode transparent to LASER radiation, and a LASER beam for scanning said DELST; a flood gun to provide a flow of electrons for charing the second electrode; a bias light which when positioned for its radiation to pass through the first electrode causes a photoconductive response in the first layer, and when positioned for its radiation to pass through the second electrode, is able also to pass through the second layer photoconductor and to cause a photoconductive response in the first layer; a means for the scanning beam, bias light and the flood gun to operate in combination to establish the storage charge at the interface surface and the second electrode as well as the equilibrium potential across the first and second electrodes; a means for reducing noise inducing capacity to the preamplifier; a means for sequencing the process of charge storage, exposure and video signal generation.

Claim 119

Dependent Claim 184 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation, a photoconductive first layer responsive to imaging radiation, a second photoconductive layer responsive to laser beam radiation and supporting a second conducting electrode transparent to LASER radiation, and a LASER beam for scanning said DELST; a flood gun to provide a flow of electrons for charing the second electrode; a bias light which when positioned for its radiation to pass through the first electrode causes a photoconductive response in the first layer, and when positioned for its radiation to pass through the second electrode, is able also to pass through the second layer photoconductor and to cause a photoconductive response in the first layer; a means for the scanning beam, bias light and the flood gun to operate in combination to establish the storage charge at the interface surface and the second electrode as well as the equilibrium potential across the first and second electrodes; a means for reducing noise inducing capacity to the preamplifier; a means for sequencing the process of charge storage, exposure and video signal generation.

Claim 120

Dependent Claim 55 words

A DELST image vacuum tube according to claim 106 where the image tube is designed to include windows transparent to the laser radiation and to the bias light radiation located so that the optical paths of the laser scanning beam and the bias light irradiating the second electrode are not obstructed by the flood gun.

Claim 121

Dependent Claim 37 words

A scanner image tube according to claim 106 operating in a pulsed mode, wherein the flood gun, bias light, laser scanner and exposure are pulsed in a manner designed to meet the needs of an imaging requirement.

Claim 122

Dependent Claim 32 words

A scanner image tube according to claim 106, operating in a continuous mode of operation, wherein the flood beam, the scanning beam, bias light and exposure are in operation simultaneously and continuously.

Claim 123

Dependent Claim 56 words

A scanner image sensor according to claim 106, structured so that the second electrode has an extension which comprises an appendage placed so that the flood gun is off to the side of the second electrode and permits more direct placement of the transparent windows relative to the laser scanner, bias light and the scanned raster.

Claim 124

Dependent Claim 23 words

A scanner image tube according to claim 110 structured with the first electrode divided into stripes to further minimize capacity when applications warrent.

Claim 125

Dependent Claim 206 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer with a second transparent conducting electrode; a channel multiplier whose output is in proximity focusing to the second electrode and whose input surface is raster scanned by a high velocity electron beam, whose output can have acceleration potentials adjusted to provide an amplified scanning high velocity electron current or a low velocity electron current trained on the second electrode; a means for the scanning high velocity beam and the low velocity beam to operate in combination to establish the storage at the interface; a means for the low velocity beam operation to charge the second electrode; a means for the high velocity beam to generate a video signal during the scan after exposure; a means for the electron optics governing scanning electron beam input to the channel multiplier to be designed at least similar to a flat panel type display; a means for a bias light positioned to expose the first layer from the front through the first electrode or from the rear through the second electrode and the multiplying layer for the purpose of maintaining an equilibrium potential across the first and second electrodes.

Claim 126

Dependent Claim 206 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a charge multiplying second layer with a second transparent conducting electrode; a channel multiplier whose output is in proximity focusing to the second electrode and whose input surface is raster scanned by a high velocity electron beam, whose output can have acceleration potentials adjusted to provide an amplified scanning high velocity electron current or a low velocity electron current trained on the second electrode; a means for the scanning high velocity beam and the low velocity beam to operate in combination to establish the storage at the interface; a means for the low velocity beam operation to charge the second electrode; a means for the high velocity beam to generate a video signal during the scan after exposure; a means for the electron optics governing scanning electron beam input to the channel multiplier to be designed at least similar to a flat panel type display; a means for a bias light positioned to expose the first layer from the front through the first electrode or from the rear through the second electrode and the multiplying layer for the purpose of maintaining an equilibrium potential across the first and second electrodes.

Claim 127

Dependent Claim 57 words

A scanner image tube according to claim 112, where the second electrode is extended beyond the area covered by the raster, and where a flood gun can be added to provide low velocity electrons for deposition cn the second electrode, and where separate scanning and flood guns permit the choice of their simultaneous or pulsed sequence operation.

Claim 128

Dependent Claim 14 words

A scanner image tube according to claim 112, where the second electrode is removed.

Claim 129

Dependent Claim 27 words

A scanner image tube according to claim 113 or 114 structured with the first electrode divided into stripes to further minimize noise inducing capacity when applications warrent.

Claim 130

Dependent Claim 219 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a photoconductive second layer with a second transparent electrode; a channel multiplier positioned in a manner resembling a third generation low light level intensifier, whose output is in proximity focusing to the second electrode and whose input surface is in proximity focusing to a photoelectron emitter deposited on a transparent electrode surface; a laser scanner trained on the photoemitter surface to generate an electron beam scan at the input to the channel multiplier; a control of the accelerating potential at the output of the channel multiplier to permit high velocity or low velocity electrons to reach the second electrode; a means for the high and low velocity beams to operate in combination to establish the storage charge at the interface; a means for the low velocity beam operation to charge the second electrode; a means for the high velocity beam to generate a video signal during the scan after exposure; a means for a bias light to be positioned so that its radiation can pass through the first electrode and expose the first layer or pass through the second electrode and the multiplying layer to expose the first layer, for the purpose of maintaining an equilibrium potential across the first and second electrodes.

Claim 131

Dependent Claim 219 words

A scanner image tube comprising: a DELST structure, a first electrode transparent to imaging radiation and a photoconductive second layer with a second transparent electrode; a channel multiplier positioned in a manner resembling a third generation low light level intensifier, whose output is in proximity focusing to the second electrode and whose input surface is in proximity focusing to a photoelectron emitter deposited on a transparent electrode surface; a laser scanner trained on the photoemitter surface to generate an electron beam scan at the input to the channel multiplier; a control of the accelerating potential at the output of the channel multiplier to permit high velocity or low velocity electrons to reach the second electrode; a means for the high and low velocity beams to operate in combination to establish the storage charge at the interface; a means for the low velocity beam operation to charge the second electrode; a means for the high velocity beam to generate a video signal during the scan after exposure; a means for a bias light to be positioned so that its radiation can pass through the first electrode and expose the first layer or pass through the second electrode and the multiplying layer to expose the first layer, for the purpose of maintaining an equilibrium potential across the first and second electrodes.

Claim 132

Dependent Claim 57 words

A scanner image tube according to claim 116, where the second electrode is extended beyond the area covered by the raster as an appendage, and a separate flood gun is positioned to train flood beam electrons on to the second electrode extension, and where the sources of the scanning beam and flood beam permit their simultaneous operation.

Claim 133

Dependent Claim 14 words

A scanner image tube according to claim 116, where the second electrode is removed.

Claim 134

Dependent Claim 25 words

A scanner image tube according to claim 116, structured with the first electrode divided into stripes to further minimize noise inducing capacity when applications warrent.

Claim 135

Dependent Claim 33 words

A scanner image tube according to claim 1, wherein said first electrode is adapted for coupling to a video preamplifier by the attachment of a resistor through which said preamplifier would be coupled.

Claim 136

Dependent Claim 33 words

A scanner image tube according to claim 1, wherein said second electrode is adapted for coupling to a video preamplifier by the attachment of a resistor through which said preamplifier would be coupled.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-11-02	1991-05-04	1991-11-03	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-11-02	1995-05-04	1995-11-03	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-11-02	1999-05-04	1999-11-03	$7700.00	Window Closed / Lapsed

Large capacity, large area video imaging sensor

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