US4246510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retina for pyroelectric vidicon
Assignee: United States Department of the Army
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Filing: 1976-01-07
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Granted: 1981-01-20
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Expires: 1996-01-07
Abstract
Abstract A retina is provided for a pyroelectric vidicon which is rugged, long liv and has increased resistance to contamination by normal environments encountered during testing and subsequent installation in the vidicon tube.
Inventors
- 👤 Wellman L. Clark
- 👤 John T. Cox
- 👤 Gerald Klauber
- 👤 Ferdinand C. Petito
- 👤 John B. Ramsey, Jr.
- 👤 John E. Waylonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:00
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/49; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/458; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
In an optical system, wherein a wafer of pyroelectric material chosen from the group comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said one side is detected; the improvement comprising: a single layer only of dielectric material entirely covering said remaining side of said wafer, said layer having a secondary emission coefficient greater than one and having a sheet resistance greater than 10 12 ohm/square, and said dielectric layer being formed of a compound chosen from the group consisting of SiO 2 , BaF 2 , MgO, MgF, KCl, BaO 2 , spinel and Ge.
Claim 2
Dependent Claim
146 words
In an optical system, wherein a wafer of pyroelectric material chosen from the group comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said one side is detected; the improvement comprising: a single layer only of dielectric material entirely covering said remaining side of said wafer, said layer having a secondary emission coefficient greater than one and having a sheet resistance greater than 10 12 ohm/square, and said dielectric layer being formed of a compound chosen from the group consisting of SiO 2 , BaF 2 , MgO, MgF, KCl, BaO 2 , spinel and Ge.
Claim 3
Dependent Claim
95 words
In an optical system, wherein a wafer of pyroelectric material chosen from the group comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said one side is detected; the improvement comprising: a single layer consisting only of silicon dioxide entirely covering said remaining broad side.
Claim 4
Dependent Claim
95 words
In an optical system, wherein a wafer of pyroelectric material chosen from the group comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said one side is detected; the improvement comprising: a single layer consisting only of silicon dioxide entirely covering said remaining broad side.
Claim 5
Dependent Claim
142 words
In an optical system, wherein a wafer of pyroelectric material chosen from the gorup comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said is detected; the improvement comprising: a single layer only of dielectric material entirely covering said remaining broad side of said wafer, said layer having a secondary emission coefficient greater than one and having a sheet resistance greater than 10 12 ohm/square, and said dielectric layer being formed of a compound chosen from the group consisting of BaF 2 , MgO, MgF, KCl, BaO 2 , spinel and Ge.
Claim 6
Dependent Claim
142 words
In an optical system, wherein a wafer of pyroelectric material chosen from the gorup comprising Triglycine Sulphate, Triglycine Tetrafluoroberyllate, Deuterated Triglycine Tetrafluoroberyllate, Lithium Tantallate, Lithium Niobate, and Lead Lanthanum Ziroconate is coated on one broad side with a thin layer of conductive material and an electronic means coupled to said thin layer is provided to scan the remaining broad side of said wafer with an electron beam whereby a thermal image induced on said is detected; the improvement comprising: a single layer only of dielectric material entirely covering said remaining broad side of said wafer, said layer having a secondary emission coefficient greater than one and having a sheet resistance greater than 10 12 ohm/square, and said dielectric layer being formed of a compound chosen from the group consisting of BaF 2 , MgO, MgF, KCl, BaO 2 , spinel and Ge.
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |