US3676732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electronic imaging apparatus
Assignee: CBS Broadcasting Inc
•
Filing: 1969-09-08
•
Granted: 1972-07-11
•
Expires: 1989-09-08
Abstract
Abstract In the particular embodiments of the invention described herein, a frequency selective photo-electronic image transducer includes an insulating plate having minute closely spaced prismatic ridges, the surfaces of which are covered with a capacitive sandwich structure comprising an electrode coated on the plate, an insulating layer and a photo-emissive material at the outer surface, the latter being in the form of a mosaic of isolated elements. The electrodes on alternate ridges, or in another form on corresponding sides of every ridge, are connected together and to an alternating potential source operating at the desired frequency of selection, the other electrodes being grounded. An illuminated object containing light modulated with information at the selected frequency is imaged onto the surface of the plate intermittently and, between exposures, a line scan tube image onto the surface reads out the charge accumulated at the various elemental areas in succession. The frequency-selected image is then reproduced on a display tube. In an alternative embodiment, light from an image of the object is conveyed to the photosensitive plate by a fiber-optics array and a mask is provided to compensate for inequalities in the sensitivities of the photoemissive elements.
Inventors
- 👤 Dennis Gabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:41
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H04; H04N; H04N5/00; H04N5/222; H04N5/257; Y; Y10; Y10S; Y10S148/00; Y10S148/143
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
Photoelectronic imaging apparatus comprising image recording means for detecting image information including an array of closely spaced interlaced flat electrode means, each providing a flat electrode surface, supported on an insulating support, a thin layer of insulating material covering the electrode means, and a mosaic of electrically isolated closely spaced photoelectric elements disposed on the layer of insulating material, and alternating voltage supply means connectable to alternate electrode means in the interlaced grid to provide alternately opposite voltage relationships between adjacent electrode means of the grid at a selected frequency.
Claim 2
Dependent Claim
90 words
Photoelectronic imaging apparatus comprising image recording means for detecting image information including an array of closely spaced interlaced flat electrode means, each providing a flat electrode surface, supported on an insulating support, a thin layer of insulating material covering the electrode means, and a mosaic of electrically isolated closely spaced photoelectric elements disposed on the layer of insulating material, and alternating voltage supply means connectable to alternate electrode means in the interlaced grid to provide alternately opposite voltage relationships between adjacent electrode means of the grid at a selected frequency.
Claim 3
Dependent Claim
34 words
Photoelectronic imaging apparatus according to claim 1 wherein the insulating support is formed with an array of parallel prismatic ridges and each ridge carries one of the electrode means extending along both sides thereof.
Claim 4
Dependent Claim
42 words
Photoelectronic imaging apparatus according to claim 1 wherein the insulating support is formed with an array of parallel prismatic ridges and each ridge carries one of the electrode means along one surface and another of the electrode means along the other surface.
Claim 5
Dependent Claim
41 words
Photoelectronic imaging apparatus according to claim 1 including enclosure means enclosing the image recording means and having a transparent window parallel thereto, and transparent electrode means disposed on the inner surface of the window closely adjacent to the image recording means.
Claim 6
Dependent Claim
65 words
Photoelectronic imaging apparatus according to claim 1 including enclosure means enclosing the image recording means and including an array of parallel optical fibers forming one wall of the enclosure means wherein the fibers of the array terminate closely adjacent to the image recording means at the interior of the enclosure means and the other ends of the fibers from the outer surface of the wall.
Claim 7
Dependent Claim
52 words
Photoelectric imaging apparatus according to claim 5 including compensating mask means mounted adjacent to the ends of the optical fibers and having an optical density in each region related to the sensitivity of the image recording means in the corresponding region to compensate for inequalities in the sensitivities of the electrode means.
Claim 8
Independent Claim
162 words
A method for making en electrode array comprising directing a metallic vapor toward an array of parallel adjacent prismatic ridges separated by valleys at an angle such that the top of each ridge obstructs the vapor so as to prevent any metallic coating at the bottom of the valley between each pair of ridges and directing a metallic vapor toward the array from the oppoSite side at an angle such that the top of each ridge obstructs the vapor so as to prevent any metallic coating at the bottom of the valley between the rides and including the steps of placing in acid resistant filler in the valleys between the ridges so as to cover the metallic coatings which have been made by the vapor on the sides of the ridges, leaving the coating at the top of the ridges exposed, and dissolving the metallic coating along the tops of the ridges to provide separate electrodes on each side of each ridge.
Claim 9
Independent Claim
162 words
A method for making en electrode array comprising directing a metallic vapor toward an array of parallel adjacent prismatic ridges separated by valleys at an angle such that the top of each ridge obstructs the vapor so as to prevent any metallic coating at the bottom of the valley between each pair of ridges and directing a metallic vapor toward the array from the oppoSite side at an angle such that the top of each ridge obstructs the vapor so as to prevent any metallic coating at the bottom of the valley between the rides and including the steps of placing in acid resistant filler in the valleys between the ridges so as to cover the metallic coatings which have been made by the vapor on the sides of the ridges, leaving the coating at the top of the ridges exposed, and dissolving the metallic coating along the tops of the ridges to provide separate electrodes on each side of each ridge.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |