US4016416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase compensated zone plate photodetector
Assignee: United States Department of the Air Force
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Filing: 1976-03-23
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Granted: 1977-04-05
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Expires: 1996-03-23
Abstract
Abstract A radiation transparent base having a number of coincentric Fresnel rings mounted on one face, and one-quarter wavelength in thickness and a reflective coating covering the face and rings and a detector mounted on the opposite face to collect reflected in phase radiation.
Inventors
- 👤 Freeman D. Shepherd, Jr.
- 👤 Sven A. Roosild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:00
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0414; H; H10; H10F; H10F77/00; H10F77/40; H10F77/413; G01J1/0204; G01J1/0209; G01J3/00; G01J3/02; G01J3/0205; G01J3/021
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A phase compensated zone plate photodetector comprising: a base of material transparent to radiation; a plurality of coincentric rings, transparent to radiation mounted on one face of said base; a radiation reflective material overcovering the said face of the base and rings mounted thereon, and radiation detection means for receiving reflected radiation mounted on a second face of said base.
Claim 2
Dependent Claim
60 words
A phase compensated zone plate photodetector comprising: a base of material transparent to radiation; a plurality of coincentric rings, transparent to radiation mounted on one face of said base; a radiation reflective material overcovering the said face of the base and rings mounted thereon, and radiation detection means for receiving reflected radiation mounted on a second face of said base.
Claim 3
Dependent Claim
16 words
A phase compensated zone plate photodetector according to claim 1 wherein said base material is silicon.
Claim 4
Dependent Claim
18 words
A phase compensated zone plate photodetector according to claim 2 wherein, said rings are formed of silicon dioxide.
Claim 5
Dependent Claim
17 words
A phase compensated zone plate photodetector according to claim 3 wherein, said detector is a Schottky barrier.
Claim 6
Dependent Claim
16 words
A phase compensated zone plate photodetector according to claim 1 wherein the base material is glass.
Claim 7
Dependent Claim
17 words
A phase compensated zone plate photodetector according to claim 5 wherein the detector is a p-n junction.
Claim 8
Dependent Claim
23 words
A phase compensated zone plate photodetector according to claim 1 wherein said rings thickness measures one quarter the wavelength of the incident radiation.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |