US3688281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for retrieving information from a hologram matrix
Assignee: Siemens AG
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Filing: 1971-03-29
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Granted: 1972-08-29
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Expires: 1991-03-29
Abstract
Abstract A method and device for retrieving information from a matrix of holograms arranged in columns and rows characterized by illuminating the matrix of holograms with a laser illumination and focusing the hologram images on a matrix of photosensitive cells arranged in columns and rows corresponding to the columns and rows of the matrix of holograms, scanning the matrix of photosensitive cells one column at a time and collecting the information transferred to each of the photosensitive cells of the column from its respective hologram. One embodiment of the invention utilizes photoconductive devices for the photosensitive cells of the matrix and an electron beam which is deflected either in a curve path to project on a column with a vertical angle thereto or is deflected twice to insure a vertical angle of incidence on the column. Another embodiment of the invention utilizes a method and apparatus in which the photosensitive cells are photoemissive devices which emit electrons to create an electronic image and includes means for deflecting the image to pass portions from an individual column of the photodevices through a slot onto electron collecting means to obtain the information transferred to the photodevices.
Inventors
- 👤 Werner Veith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/042; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
105 words
A method for retrieving information from a matrix of individual holograms arranged in columns and rows with a device having a matrix of photosensitive cells arranged in corresponding columns and rows comprising the steps of: illuminating the matrix of holograms with laser illumination and focusing the hologram images on the matrix of photosensitive cells to transfer the information of the matrix of holograms to the matrix of photosensitive cells; simultaneously scanning all of the photosensitive cells in a column of a matrix of the photosensitive cells; and collecting the information transferred to each of the photosensitive cells from the hologram images from the scanned column.
Claim 2
Independent Claim
105 words
A method for retrieving information from a matrix of individual holograms arranged in columns and rows with a device having a matrix of photosensitive cells arranged in corresponding columns and rows comprising the steps of: illuminating the matrix of holograms with laser illumination and focusing the hologram images on the matrix of photosensitive cells to transfer the information of the matrix of holograms to the matrix of photosensitive cells; simultaneously scanning all of the photosensitive cells in a column of a matrix of the photosensitive cells; and collecting the information transferred to each of the photosensitive cells from the hologram images from the scanned column.
Claim 3
Dependent Claim
120 words
A method according to claim 1, wherein said matrix of photosensitive cells is a matrix of photo conductive devices with each photoconductive device of a row being connected to the same electrical conductor extending out of the device; and wherein said step of scanning includes the steps of: projecting an electron beam having a width of one photo device and the length of one column of devices to cause an electrical signal to flow from each of the devices in accordance with the information transferred respectively thereto; and controlling the path of the electron beam by deflecting the beam to project on the selected column of photoconductive devices with the beam having a substantially vertical impact on the photoconductive devices.
Claim 4
Dependent Claim
47 words
A method according to claim 2, wherein said step of controlling includes focusing the beam on the selected column by deflecting and then subjecting the focussed beam to an additional static deflecting filed to deflect the beam a second time and to obtain the vertical impact angle.
Claim 5
Dependent Claim
69 words
A method according to claim 2, wherein the electron beam is projected parallel to the matrix of photoconductive devices and wherein the step of controlling includes the deflecting of the beam into a curved path to project with a vertical angle of impact on the column of photoconductive devices with the degree of curvature of the path being varied to project the beam on different columns of photoconductive devices.
Claim 6
Dependent Claim
97 words
A method according to claim 1, wherein the matrix of photosensitive cells is a matrix of photoemissive devices emitting electrons when illuminated by light waves, said method including focusing the emitted electrons into an electronic image; wherein said step of collecting includes passing a portion of the electronic image created by a column of said matrix, through a slot-like aperture on to electron collector and wherein said step of scanning includes selectively shifting the electronic image with respect to the slot-like aperture to enable collection of the information for selected column of the matrix of photo devices.
Claim 7
Independent Claim
98 words
An apparatus for retrieving information from a storage matrix of elements arranged in columns and rows comprising: a matrix of photosensitive cells arranged in columns and rows with the matrix positioned on one side of an envelope for receiving information from light waves projected thereon from the storage matrix; means disposed in the envelope for scanning all of the photosensitive cells in a column simultaneously to obtain the information contained therein; and means disposed in the envelope for collecting the information released from the photosensitive cells of the scanned column and conducting the information out of the envelope.
Claim 8
Independent Claim
98 words
An apparatus for retrieving information from a storage matrix of elements arranged in columns and rows comprising: a matrix of photosensitive cells arranged in columns and rows with the matrix positioned on one side of an envelope for receiving information from light waves projected thereon from the storage matrix; means disposed in the envelope for scanning all of the photosensitive cells in a column simultaneously to obtain the information contained therein; and means disposed in the envelope for collecting the information released from the photosensitive cells of the scanned column and conducting the information out of the envelope.
Claim 9
Dependent Claim
118 words
An apparatus according to claim 6, wherein each of the photosensitive cells is a photoconductive device, wherein the means for collecting includes a plurality of conductors with all of the photodevices of one row electrically connected to a single conductor; and wherein the means for scanning includes means for projecting an electron beam having a width of a photodevice and a length of a column of devices to cause an electrical signal to flow from each of the photodevices in accordance with the information signal transferred thereto, and means for controlling the path of the electron beam to selectively project on the selected column of photo devices with the beam having a substantially vertical angle of impact thereon.
Claim 10
Dependent Claim
50 words
In an apparatus according to claim 7, wherein said controlling means includes: means for focusing the beam on the selected column by deflecting, and means for providing an additional static deflecting field to deflect the focused beam a second time to obtain the vertical impact angle on the photo devices.
Claim 11
Dependent Claim
139 words
An apparatus according to claim 7, wherein the means for projecting provides an electron beam extending substantially parallel to a face of the matrix of photo devices, and wherein said means for controlling includes a positively biased rod electrode, a negatively biased electrode having a curved surface facing said rod electrode and having an axis of curvature parallel to the axis of the rod electrode, and means for varying the potential of the electrodes, said electrodes being parallel to the face of the matrix and with the electron beam passing therebetween so that the beam of electrons is deflected into a curved path to impact vertically on a selected column of photo devices with the amount of curvature being varied by the means varying the potential on the electrodes to select a different column on which the beam impacts.
Claim 12
Dependent Claim
153 words
An apparatus according to claim 6, wherein the said matrix of photosensitive cells is a matrix of photoemissive devices emitting electrons when subjected to light waves, said apparatus further including means for focusing the emitted electrons into an electronic image, wherein the means for collecting includes a plurality of electron collectors with one for each photo device of a column and each of the collectors having a conductor extending out of the envelope, and baffle meaNs disposed between the collectors and the matrix of photo devices defining a slot having a length and width of a size to pass the electron image from one column of photo devices through the slot and onto the collectors; and wherein the means for scanning includes means for shifting the electron image in a direction perpendicular to the slot to selectively pass the electron image from selected columns of photo devices through the slot onto the collectors.
Claim 13
Dependent Claim
31 words
A device according to claim 10, which further includes a cone-shaped shell-like electrode cooperating with the baffle means to form a corrective lens for the electronic image to limit distortion therein.
Claim 14
Dependent Claim
48 words
A device according to claim 10, which further includes each of the collectors having a secondary emission multiplier stage in the form of a channel amplifier connected in a circuit therewith so that an electrical signal generated in the collector by the electronic emission projected thereon is amplified.
References Cited (Backward Citations)
US3543248A
Cited
US3518634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |