GB783626A - Improvements in or relating to infra-red radiation transmitting optical filters - Google Patents
Improvements in or relating to infra-red radiation transmitting optical filtersInfo
- Publication number
- GB783626A GB783626A GB59055A GB59055A GB783626A GB 783626 A GB783626 A GB 783626A GB 59055 A GB59055 A GB 59055A GB 59055 A GB59055 A GB 59055A GB 783626 A GB783626 A GB 783626A
- Authority
- GB
- United Kingdom
- Prior art keywords
- infra
- transmitting optical
- hydrogen
- relating
- optical filters
- 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
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Light Receiving Elements (AREA)
Abstract
One layer of an infra-red transmitting optical filter is formed by the thermal evaporation on to a carrier such as glass or a plastic polymeric material of a rare earth metal oxalate, zinc oxide, cadmium oxide, or one of the sulphides, selenides or tellurides of cadmium, zinc, or inerany, preferably in the atmosphere of a protective gas such as hydrogen, hydrogen sulphide, hydrogen selenide or hydrogen telluride.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB59055A GB783626A (en) | 1955-01-07 | 1955-01-07 | Improvements in or relating to infra-red radiation transmitting optical filters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB59055A GB783626A (en) | 1955-01-07 | 1955-01-07 | Improvements in or relating to infra-red radiation transmitting optical filters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB783626A true GB783626A (en) | 1957-09-25 |
Family
ID=9707045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB59055A Expired GB783626A (en) | 1955-01-07 | 1955-01-07 | Improvements in or relating to infra-red radiation transmitting optical filters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB783626A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4057316A (en) * | 1975-02-18 | 1977-11-08 | Balzers Patent- Und Beteiligungs-Aktiengesellschaft | Reflection reducing multilayer system on a highly refractive infrared transmitting substrate |
-
1955
- 1955-01-07 GB GB59055A patent/GB783626A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4057316A (en) * | 1975-02-18 | 1977-11-08 | Balzers Patent- Und Beteiligungs-Aktiengesellschaft | Reflection reducing multilayer system on a highly refractive infrared transmitting substrate |
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