US4394571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically enhanced Schottky barrier IR detector
Assignee: Honeywell Inc
•
Filing: 1981-05-18
•
Granted: 1983-07-19
•
Expires: 2001-05-18
Abstract
Abstract A Schottky barrier type radiation detector in combination with a mirror positioned from the barrier by a distance longitudinally equal to one quarter wavelength of the radiation being detected.
Inventors
- 👤 Jaan Jurisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:39
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/227; H10F77/00; H10F77/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
In a Schottky barrier radiation detector the improvement comprising: a mirror positioned a distance from the barrier substantially equal to one quarter of the wavelength of the radiation being detected.
Claim 2
Dependent Claim
30 words
In a Schottky barrier radiation detector the improvement comprising: a mirror positioned a distance from the barrier substantially equal to one quarter of the wavelength of the radiation being detected.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1 wherein the barrier has a thickness chosen such that the impedance of the barrier is 120π/n ohms per square where n is the index of refraction of the material between the barrier and the mirror.
Claim 4
Independent Claim
58 words
The method of constructing a radiation detector comprising the steps of: 1. selecting a first material with a known index of refraction n, 2. depositing a second material on a radiation transparent base to form a Schottky barrier, 3. adjusting the thickness of the barrier to produce an impedance determined by the expression 120π/n ohms per square, 4.
Claim 5
Independent Claim
58 words
The method of constructing a radiation detector comprising the steps of: 1. selecting a first material with a known index of refraction n, 2. depositing a second material on a radiation transparent base to form a Schottky barrier, 3. adjusting the thickness of the barrier to produce an impedance determined by the expression 120π/n ohms per square, 4.
Claim 6
Dependent Claim
55 words
placing a thickness of the first material over the barrier, the thickness being determined as optically equal to λ/4 where λ is the wavelength of the radiation to be detected and, 5. placing a mirror on the first material at the optical distance λ/4 so that radiation passing through the base, the barrier and the
Claim 7
Dependent Claim
55 words
placing a thickness of the first material over the barrier, the thickness being determined as optically equal to λ/4 where λ is the wavelength of the radiation to be detected and, 5. placing a mirror on the first material at the optical distance λ/4 so that radiation passing through the base, the barrier and the
Claim 8
Dependent Claim
39 words
first material is reflected back to the barrier. 4. The method of claim 3 wherein the placing of the first material on the barrier and the placing of the mirror on the first material is done by vacuum deposition.
References Cited (Backward Citations)
US3902066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |