X-ray and ultraviolet detectors for beam-index and heaterless cathode ray tubes

Claim 2

A heaterless electron discharge device comprising a photonsensitive source of electron; a target screen adapted to be impinged upon by electrons derived from said source of electrons, thereby to generate electromagnetic radiation; and light pipescintillator means disposed in the path of said radiation; wherein scintillations, generated when said radiation excites said light pipe-scintillator, are transmitted via the light pipe to fall upon said photon-sensitive source of electrons.

Claim 3

A heaterless cathode ray tube in accordance with claim 1 having an evacuated envelope with a neck section for housing the photon-sensitive electron source, a target screen section, and an intermediate section which connects the neck section to the target screen section; said light pipe-scintillator means being positioned with respect to said neck section so that scintillations generated in the interior region of the light pipe-scintillator are transmitted, via a series of internal reflections, to impinge upon said photon-sensitive source of electrons.

Claim 4

A regenerative detector comprising: first means that yield electrons upon excitation by electromagnetic radiation, a plurality of dynodes that amplify said electrons by the secondary emission process, an anode that collects the amplified electrons to yield an output signal, electron-sensitive means disposed in the path of electron flow that yields electromagnetic radiation upon excitation by the electrons, and light pipe means for transmitting optical signals representative of said said electromagnetic radiation to impinge upon said first means.

Claim 5

A regenerative detector comprising: first means that yield electrons upon excitation by electromagnetic radiation, a plurality of dynodes that amplify said electrons by the secondary emission process, an anode that collects the amplified electrons to yield an output signal, electron-sensitive means disposed in the path of electron flow that yields electromagnetic radiation upon excitation by the electrons, and light pipe means for transmitting optical signals representative of said said electromagnetic radiation to impinge upon said first means.

Claim 6

A heaterless cathode ray tube of the beam-index variety comprising an evacuated envelope having (1) a first section including an electron gun with a photon-sensitive source of electrons from which is derived an electron beam for scanning a target screen and (2) a faceplate section having associated therewith an electron-sensitive target screen responsive to the scanning action of the electron beam, the target screen having a pattern of periodically arranged strips for generating index signals to indicate the position of the electron beam on the target screen; in combination with (3) elongated light pipe means disposed so as to pick up and transmit optical signals emerging therefrom fall upon said photon-sensitive source of electrons thereby to provide the scannable electron beam.

Claim 7

A heaterless cathode ray tube of the beam-index variety comprising an evacuated envelope having (1) a first section including an electron gun with a photon-sensitive source of electrons from which is derived an electron beam for scanning a target screen and (2) a faceplate section having associated therewith an electron-sensitive target screen responsive to the scanning action of the electron beam, the target screen having a pattern of periodically arranged strips for generating index signals to indicate the position of the electron beam on the target screen; in combination with (3) elongated light pipe means disposed so as to pick up and transmit optical signals emerging therefrom fall upon said photon-sensitive source of electrons thereby to provide the scannable electron beam.

Claim 8

The CRT of claim 4 wherein the elongated light pipe is comprised of a scintillator material transmissive of its scintillations and is positioned to be penetrated by the index signals along a substantial portion of its length thereby to generate optical signals in the interior of the light pipe which are transmitted to the exit terminal thereof in concentrated form.

Claim 9

A heaterless cathode ray tube comprising: an envelope including a target screen comprIsing means for generating a first and second index signal in response to excitation by the scanning beam indicative of the position of the scanning beam on the target screen; a first elongated light pipe for transmitting optical signals representative of said first index signal, a second elongated light pipe for transmitting optical signals representative of said second index signal; a first and second electron-emitting photon-sensitive element; means for positioning the exit terminals of said first and second light pipes so that the optical radiation emanating therefrom impinges upon said first and second photon-sensitive elements, respectively, thereby to provide a scannable electron beam; and means intermediate said elements and the target screen for modulating the scannable beam of electrons.

Claim 10

A heaterless cathode ray tube comprising: an envelope including a target screen comprIsing means for generating a first and second index signal in response to excitation by the scanning beam indicative of the position of the scanning beam on the target screen; a first elongated light pipe for transmitting optical signals representative of said first index signal, a second elongated light pipe for transmitting optical signals representative of said second index signal; a first and second electron-emitting photon-sensitive element; means for positioning the exit terminals of said first and second light pipes so that the optical radiation emanating therefrom impinges upon said first and second photon-sensitive elements, respectively, thereby to provide a scannable electron beam; and means intermediate said elements and the target screen for modulating the scannable beam of electrons.

Claim 11

A beam-index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, and screen having target elements disposed to be excited by the electron beam, an array of index signal generating elements disposed in register with the target element, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons, so that radiation transmitted through light the pipe impinges upon said photon-sensitive source of electrons; said light pipe member further comprising a slab of scintillator material having a broad surface area disposed to be impinged upon and penetrated by the index signals over a substantial region thereof whereby scintillations are generated in the interior of the slab for transmission to said exit termination.

Claim 12

A beam-index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, and screen having target elements disposed to be excited by the electron beam, an array of index signal generating elements disposed in register with the target element, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons, so that radiation transmitted through light the pipe impinges upon said photon-sensitive source of electrons; said light pipe member further comprising a slab of scintillator material having a broad surface area disposed to be impinged upon and penetrated by the index signals over a substantial region thereof whereby scintillations are generated in the interior of the slab for transmission to said exit termination.

Claim 13

A beam index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, said screen having target elements disposed to be excited by the electron beam, an electron permeable layer disposed rearwardly of said target elements, an array of index signal generating elements disposed rearwardly of said layer, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam, an electron permeable ion absorbing layer disposed on the back of said index signal generating element for suppressing the generation of spurious index signals; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons so that radiation transmitted through the light pipe impinges upon said photon-sensitive source of electrons wherein said light pipe member also has an entrance terminal disposed to be impinged upon by the radiation emitted from the index generating elements whereby said radiation is transmitted through the light pipe to release electrons from said photon-sensitive source.

Claim 14

A beam index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, said screen having target elements disposed to be excited by the electron beam, an electron permeable layer disposed rearwardly of said target elements, an array of index signal generating elements disposed rearwardly of said layer, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam, an electron permeable ion absorbing layer disposed on the back of said index signal generating element for suppressing the generation of spurious index signals; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons so that radiation transmitted through the light pipe impinges upon said photon-sensitive source of electrons wherein said light pipe member also has an entrance terminal disposed to be impinged upon by the radiation emitted from the index generating elements whereby said radiation is transmitted through the light pipe to release electrons from said photon-sensitive source.

Claim 15

A beam index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, said screen having target element disposed to be excited by the electron beam, and electron permeable layer disposed rearwardly of said target elements, an array of index signal generating elements disposed rearwardly of said layer, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam, an electron permeable ion absorbing layer diaposed on the back of said index signal generating elements for suppressing the generation of spurious index signals; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons so that radiation transmitted through the light pipe impinges upon said photon-sensitive source of electrons wherein said light pipe member comprises an elongated light pipe-scintillator disposed to be impinged upon by the radiation emitted from the index generating elements along its length, said light pipe-scintillator being further characterized in that it is capable of being penetrated by the index radiation thereby to generate scintillations in its interior region which are light piped to the exit termination.

Claim 16

A beam index cathode ray tube comprising a target screen and means including an electron gun for projecting an electron beam onto said screen, a photon-sensitive source of electrons in said electron gun from which the electron beam is derived, said screen having target element disposed to be excited by the electron beam, and electron permeable layer disposed rearwardly of said target elements, an array of index signal generating elements disposed rearwardly of said layer, said index generating elements being radiation emissive when bombarded by electrons thereby to indicate the position on the screen of said electron beam, an electron permeable ion absorbing layer diaposed on the back of said index signal generating elements for suppressing the generation of spurious index signals; in combination with a light pipe member with an exit termination disposed proximate said photon-sensitive source of electrons so that radiation transmitted through the light pipe impinges upon said photon-sensitive source of electrons wherein said light pipe member comprises an elongated light pipe-scintillator disposed to be impinged upon by the radiation emitted from the index generating elements along its length, said light pipe-scintillator being further characterized in that it is capable of being penetrated by the index radiation thereby to generate scintillations in its interior region which are light piped to the exit termination.

Claim 17

A cathode ray tube comprising an envelope and a target screen within said envelope said screen comprising means for emitting a plurality of electromagnetic radiations designated x1, x2 ... upon excitation by a scanning beam of electrons; a plurality of spaced apart photon-sensitive means excited via each of said radiations that furnish electrons in different spatial groups designated y1, y2 ...; and means within said envelope for amplifying, combining, and focusing the thus-furnished electrons thereby to provide the beam of electrons which is used to scan the target screen; including a plurality of light pipe members each having a relatively large entrance region and relatively small exit termination, the entrance region of each light pipe comprising a scintillator material having a broad surface region which is positioned to be impinged upon and penetrated over a substantial area thereof by a selected one of said radiations x1, x2 ... thereby to generate scintillations which are transmitted via light piping action to said exit termination in order to excite a selected one of said spaced apart photon-sensitive means.

Claim 18

A cathode ray tube comprising an envelope and a target screen within said envelope said screen comprising means for emitting a plurality of electromagnetic radiations designated x1, x2 ... upon excitation by a scanning beam of electrons; a plurality of spaced apart photon-sensitive means excited via each of said radiations that furnish electrons in different spatial groups designated y1, y2 ...; and means within said envelope for amplifying, combining, and focusing the thus-furnished electrons thereby to provide the beam of electrons which is used to scan the target screen; including a plurality of light pipe members each having a relatively large entrance region and relatively small exit termination, the entrance region of each light pipe comprising a scintillator material having a broad surface region which is positioned to be impinged upon and penetrated over a substantial area thereof by a selected one of said radiations x1, x2 ... thereby to generate scintillations which are transmitted via light piping action to said exit termination in order to excite a selected one of said spaced apart photon-sensitive means.

Claim 19

A cathode ray tube comprising an envelope and a target screen within said envelope, said screen comprising means for emitting electromagnetic radiation upon excitation by a scanning beam of electron; photon-sensitive means excited via said radiation that furnish electrons; means within said envelope for amplifying and focusing said furnished electrons thereby to provide the beam of electrons which is used to scan the target screen; including a relatively small exit termination, said entrance region comprising a scintillator material having a broad surface region which is positioned to be impinged upon and penetrated over a substantial area thereof by said radiation thereby to generate scintillations which are transmitted via light piping action to said exit termination in order to excite said photon-sensitive means.

Claim 20

A cathode ray tube comprising an envelope and a target screen within said envelope, said screen comprising means for emitting electromagnetic radiation upon excitation by a scanning beam of electron; photon-sensitive means excited via said radiation that furnish electrons; means within said envelope for amplifying and focusing said furnished electrons thereby to provide the beam of electrons which is used to scan the target screen; including a relatively small exit termination, said entrance region comprising a scintillator material having a broad surface region which is positioned to be impinged upon and penetrated over a substantial area thereof by said radiation thereby to generate scintillations which are transmitted via light piping action to said exit termination in order to excite said photon-sensitive means.