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US3842274A
Expired / Lapsed
US
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Photoconductively activated gated, infrared charge coupled imaging device (pagirccd)
Assignee: United States Department of the Navy
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Filing: 1973-11-15
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Granted: 1974-10-15
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Expires: 1993-11-15
Abstract
Abstract A radiation detector which operates in the infrared 1 to 14 micron region of the electromagnetic spectrum. The detector consists of an infrared charge coupled device which depends on capacitive coupling across the interface of silicon of the photoconductive response of a narrow gap semiconductor so as to dispense with carrier injection across that interface.
Inventors
- 👤 K Scharnhorst
- 👤 R Greene
- 👤 R Schoolar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:21
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/157; H10F39/1575; H10P; H10P95/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
An infrared charge coupled image device for detecting infrared images comprising: means for providing a source of minority carriers in a substrate; means for providing a drain for said minority carriers; gating means disposed between said source providing means and said drain providing means for regulating the flow of said minority carriers from said source providing means to said drain providing means; and, photoresponsive control means connected to said gating means for controlling the regulating function of said gating means.
Claim 2
Dependent Claim
80 words
An infrared charge coupled image device for detecting infrared images comprising: means for providing a source of minority carriers in a substrate; means for providing a drain for said minority carriers; gating means disposed between said source providing means and said drain providing means for regulating the flow of said minority carriers from said source providing means to said drain providing means; and, photoresponsive control means connected to said gating means for controlling the regulating function of said gating means.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein said photoresponsive means is responsive to radiation having wavelengths greater than 1.1 Mu .
Claim 4
Dependent Claim
37 words
The device of claim 1 wherein said photoresponsive means comprises: a voltage source; a load resistor connected to said voltage source and said gating means; a photoconductive resistor connected to said gating means and a ground potential.
Claim 5
Dependent Claim
37 words
The device of claim 2 wherein said photoresponsive means comprises: a voltage source; a load resistor connected to said voltage source and said gating means; a photoconductive resistor connected to said gating means and a ground potential.
Claim 6
Dependent Claim
20 words
The device of claim 3 wherein said photoconductive resistor is constructed of a polycrystalline narrow gap photoconductive semiconductor of GeTe.
Claim 7
Dependent Claim
20 words
The device of claim 3 wherein said photoconductive resistor is constructed of a polycrystalline narrow gap photoconductive semiconductor of PbS.
Claim 8
Dependent Claim
20 words
The device of claim 3 wherein said photoconductive resistor is constructed of a polycrystalline narrow gap photoconductive semiconductor of PbTe.
Claim 9
Dependent Claim
20 words
The device of claim 3 wherein said photoconductive resistor is constructed of a polycrystalline narrow gap photoconductive semiconductor of InSb.
Claim 10
Dependent Claim
20 words
The device of claim 3 wherein said photoconductive resistor is constructed of a polycrystalline narrow gap photoconductive semiconductor of HgCdTe.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |