US4075385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-reflective coating for high energy optical components
Assignee: United States Department of the Navy
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Filing: 1977-04-01
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Granted: 1978-02-21
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Expires: 1997-04-01
Abstract
Abstract A sodium chloride or potassium chloride laser window is rendered anti-reftive by depositing, in order, an As 2 Se 3 layer, a NaF layer and an As 2 Se 3 layer. Near optimum thicknesses to permit transmission of light having wavelengths in the range of from 1 to 12 micrometers are disclosed.
Inventors
- 👤 Adrian D. Baer
- 👤 Terence M. Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:03
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
58 words
An article of manufacture consisting essentially of: A. a base selected from the group consisting of NaCl and KCl; B. a layer of As 2 Se 3 on said base; C. a layer of NaF on said layer of As 2 Se 3 ; and D. a layer of As 2 Se 3 on said layer of NaF.
Claim 2
Dependent Claim
58 words
An article of manufacture consisting essentially of: A. a base selected from the group consisting of NaCl and KCl; B. a layer of As 2 Se 3 on said base; C. a layer of NaF on said layer of As 2 Se 3 ; and D. a layer of As 2 Se 3 on said layer of NaF.
Claim 3
Dependent Claim
57 words
An article of manufacture according to claim 1 wherein the layer of As 2 Se 3 on said base has a thickness of about 1.35 micrometers, the layer of NaF has a thickness of about 0.307 micrometers and the layer of As 2 Se 3 on said layer of NaF has a thickness of about 0.390 micrometers.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |