GB1264461A - - Google Patents
Info
- Publication number
- GB1264461A GB1264461A GB1264461DA GB1264461A GB 1264461 A GB1264461 A GB 1264461A GB 1264461D A GB1264461D A GB 1264461DA GB 1264461 A GB1264461 A GB 1264461A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- layers
- wavelength
- substrate
- phase change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
1,264,461. Anti-reflection coatings. BRITISH SCIENTIFIC INSTRUMENT RESEARCH ASSOCIATION. Feb.24, 1969 [Dec.20, 19671, No.57957/67. Heading G2J. A three layer anti-reflection coating has substantially zero reflectance at two wavelengths # 0 and # 0 ' wherein the thicknesses of the three layers are related by the equations where g 1 , g 2 and g 3 represent the normalized phase thicknesses of the first, second and third layers respectively, the first layer being in contact with the substrate and are given by g 1 = 2#n 1 d 1 /# 0 , p 1 (# 0 ) represents the phase change through the first layer at wavelength # 0 , p 3 (# 0 ) represents the phase change through the third layer at wavelength # 0 , p 1 (# 0 ') represents the phase change through the first layer at wavelength # 0 ', p 3 (# 0 ') represents the phase change through the third layer at wavelength # 0 ' and where no, n 1 , n 2 , n 3 and n < being the refractive indices of the substrate, the first, second and third layers and the incident medium respectively and d 1 , d 2 and d 3 are the physical thicknesses of the first, second and third layers respectively. The substrate may comprise glass, the first layer may be made by co-depositing titanium monoxide and silicon monoxide in an oxidizing atmosphere, the second layer may comprise neodymium oxide, ceric oxide, titanium dioxide or zinc sulphide, and the third layer may comprise magnesium fluoride. The layers may be deposited on a substrate by vacuum deposition.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5795767 | 1967-12-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1264461A true GB1264461A (en) | 1972-02-23 |
Family
ID=10480454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1264461D Expired GB1264461A (en) | 1967-12-20 | 1967-12-20 |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1264461A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149138A (en) * | 1983-10-29 | 1985-06-05 | Barr & Stroud Ltd | Anti-reflection coatings for refractive optical components in two separate wavebands |
-
1967
- 1967-12-20 GB GB1264461D patent/GB1264461A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149138A (en) * | 1983-10-29 | 1985-06-05 | Barr & Stroud Ltd | Anti-reflection coatings for refractive optical components in two separate wavebands |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |