Patent US4820929A successfully refreshed from Google Patents.
US4820929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic infrared simulation cell
Assignee: Texas Medical Instruments Inc
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Filing: 1987-04-10
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Granted: 1989-04-11
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Expires: 2007-04-10
Abstract
Abstract A dynamic infrared simulation cell comprising a photoconductive layer, a first conductive layer, a second conductive layer, and an external energy source. The first conductive layer is affixed about one side of the photoconductive layer and is transmissive with respect to radiation of known energy. The second conductive layer is affixed about the other side of the photoconductive layer. The external energy source connects to the first conductive layer and the second conductive layer. The photoconductive layer is a plurality of segments of photoconductive silicon material. A dielectric material fills the areas between the segments of photoconductive material. The first conductive layer is a transparent layer of gold material. The second conductive layer is a layer of aluminum material. An enclosure is available for maintaining the cell in a darkened environment.
Inventors
- 👤 J. Everett Modisette
- 👤 R. Barry Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/60; F; F41; F41J; F41J2/00; F41J2/02; G; G02; G02F; G02F2/00; G02F2/02; H10F30/00; H10F30/10; H10F39/00; H10F39/10; H10F39/12; H10F39/191; H10F39/194; H10F77/20; H10F77/244; H10F77/254
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
106 words
A device for transforming visible images into infrared images comprising: a photoconductive layer; a first conductive layer integrally affixed to one side of said photoconductive layer, said first conductive layer being transmissive with respect to radiation of known energy, said photoconductive layer being responsive to said radiation of known energy; a second conductive layer integrally affixed to the other side of said photoconductive layer; and an external energy source connected to said first conductive layer and said second conductive layer, said external energy source for passing a current across said layers, said photoconductive layer having a modulated resistivity in relation to said radiation of known energy.
Claim 2
Independent Claim
106 words
A device for transforming visible images into infrared images comprising: a photoconductive layer; a first conductive layer integrally affixed to one side of said photoconductive layer, said first conductive layer being transmissive with respect to radiation of known energy, said photoconductive layer being responsive to said radiation of known energy; a second conductive layer integrally affixed to the other side of said photoconductive layer; and an external energy source connected to said first conductive layer and said second conductive layer, said external energy source for passing a current across said layers, said photoconductive layer having a modulated resistivity in relation to said radiation of known energy.
Claim 3
Dependent Claim
14 words
The device of claim 1, said photoconductive layer being a layer of silicon material.
Claim 4
Dependent Claim
16 words
The device of claim 1, said photoconductive layer comprising a plurality of segments of photoconductive material.
Claim 5
Dependent Claim
19 words
The device of claim 3, said segments of photoconductive material being generally uniformly distributed across said second conductive layer.
Claim 6
Dependent Claim
19 words
The device of claim 4, said segments of photoconductive material generally forming the pixels relative to a projected image.
Claim 7
Dependent Claim
19 words
The device of claim 3, said photoconductive layer further including insulative material interposed between said segments of photoconductive material.
Claim 8
Dependent Claim
20 words
The device of claim 6, said insulative material forming a layer between said first conductive layer and said photoconductive layer.
Claim 9
Dependent Claim
18 words
The device of claim 6, said insulative material being a dielectric having high resistivity and high thermal resistance.
Claim 10
Dependent Claim
16 words
The device of claim 1, said first conductive material being a transparent layer of gold material.
Claim 11
Dependent Claim
40 words
The device of claim 1, said first conductive layer further comprising a conductive band extending about the outer edges of said first conductive layer, said conductive band for transmitting energy from said external energy source to said first conductive layer.
Claim 12
Dependent Claim
27 words
The device of claim 1, said second conductive layer including cooling means interactive with said second conductive layer for the removal of heat from said photoconductive layer.
Claim 13
Dependent Claim
22 words
The device of claim 11, said cooling means being said second conductive layer comprised of a material having strong heat sink properties.
Claim 14
Dependent Claim
14 words
The device of claim 12, said second conductive layer being a layer of aluminum.
Claim 15
Dependent Claim
27 words
The device of claim 1, further comprising: enclosure means for maintaining said photoconductive layer, said first conductive layer and said second conductive layer in a darkened environment.
Claim 16
Dependent Claim
18 words
The device of claim 2, further comprising a source of imaging radiation directed toward said first conductive layer.
Claim 17
Dependent Claim
22 words
The device of claim 15, said source of imaging radiation being a light image directed across the field of said photoconductive layer.
Claim 18
Dependent Claim
25 words
The device of claim 15, said source of imaging radiation being a modulated light beam directed to said photoconductive layer in a raster scanning pattern.
Claim 19
Independent Claim
102 words
A device for transforming visible images into infrared images comprising: a first conductive layer transmissive with respect to radiation of known energy; a dielectric layer affixed to one side of said first conductive layer; a photoconductive layer having one side affixed to said dielectric layer, said photoconductive being responsive to said radiation; a second conductive layer affixed to the other side of said photoconductive layer; and electrical energy means connected to said first conductive layer and said second conductive layer for impressing a voltage across said layers, said photoconductive layer having a modulated resistivity in relation to said radiation of known energy.
Claim 20
Independent Claim
102 words
A device for transforming visible images into infrared images comprising: a first conductive layer transmissive with respect to radiation of known energy; a dielectric layer affixed to one side of said first conductive layer; a photoconductive layer having one side affixed to said dielectric layer, said photoconductive being responsive to said radiation; a second conductive layer affixed to the other side of said photoconductive layer; and electrical energy means connected to said first conductive layer and said second conductive layer for impressing a voltage across said layers, said photoconductive layer having a modulated resistivity in relation to said radiation of known energy.
Claim 21
Dependent Claim
42 words
The device of claim 18, further comprising: enclosure means for maintaining said layers in a darkened environment, said enclosure means including optics for the transmission of imaging radiation into said enclosure means and the emission of infrared radiation from said enclosure means.
Claim 22
Dependent Claim
23 words
The device of claim 18, said photoconductive layer comprising a plurality of segments of photoconductive material, said dielectric layer disposed between said segments.
Claim 23
Dependent Claim
14 words
The device of claim 18, said energy means comprising a source of alternating current.
Claim 24
Dependent Claim
32 words
The device of claim 18, said first conductive layer being a transparent gold layer, said photoconductive layer being composed of silicon material, and said second conductive layer being a layer of aluminum.
Claim 25
Independent Claim
82 words
A device for transforming visible images into infrared images a first conductive layer transmissive with respect to radiation of known energy; a second conductive layer; a plurality of segments of photoconductive material integrally affixed between said first conductive layer and said second conductive layer, each of said segments being individually responsive to said radiation of known energy; and electrical energy means connected to said first conductive layer and said second conductive layer for passing a voltage thorough said segments of photoconductive material.
Claim 26
Independent Claim
82 words
A device for transforming visible images into infrared images a first conductive layer transmissive with respect to radiation of known energy; a second conductive layer; a plurality of segments of photoconductive material integrally affixed between said first conductive layer and said second conductive layer, each of said segments being individually responsive to said radiation of known energy; and electrical energy means connected to said first conductive layer and said second conductive layer for passing a voltage thorough said segments of photoconductive material.
Claim 27
Dependent Claim
15 words
The device of claim 25, further comprising: dielectric material disposed between segments of photoconductive material.
Claim 28
Dependent Claim
24 words
The device of claim 24, said dielectric material forming a layer between said first conductive layer and said plurality of segments of photoconductive material.
Claim 29
Dependent Claim
42 words
The device of claim 23, further comprising: enclosure means for maintaining said layer in a darkened environment, said enclosure means including optics for the transmission of imaging radiation into said enclosure means and the emission of infrared radiation from said enclosure means.
Claim 30
Dependent Claim
18 words
The device of claim 23, further comprising a source of imaging radiation directed toward said first conductive layer.
Claim 31
Dependent Claim
20 words
The device of claim 23, said second conductive layer acting as a heat sink with respect to said photoconductive material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |