GB615286A - New or improved optical glasses - Google Patents
New or improved optical glassesInfo
- Publication number
- GB615286A GB615286A GB2318246A GB2318246A GB615286A GB 615286 A GB615286 A GB 615286A GB 2318246 A GB2318246 A GB 2318246A GB 2318246 A GB2318246 A GB 2318246A GB 615286 A GB615286 A GB 615286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- tho
- group
- refractive index
- optical glasses
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
615,286. Optical glasses. KODAK, Ltd. (Eastman Kodak Co., and DePaolis, P. F.). Aug. 3, 1946, No. 23182. Addition to 462,304. [Class 56] The invention of the parent Specification is modified to give three groups of glasses as follows: Group 1. Refractive index 1.65-1.69, and dispersive index 50-57, with more than 35 per cent of B 2 O 3' more than 10 per cent of ThO 2 , more than 10 per cent of La 2 O 3 , more than 20 per cent of one or more of BaO, CaO, MgO. Group 2. Refractive index 1.62-1.70, and dispersive index 53.9-60, with 40-55 per cent of B 2 O 3' and Al 2 O 3 and/or BeO, at least 25 per cent of La 2 O 3 and ThO 2 , BaO and/or SrO, and not over 3 per cent of Li 2 O, or consisting of 40-55 per cent of B 2 O 3 with at least one of Al 2 O 3 , BeO, SrO 2 , the B 2 O 3 being at least 35 per cent, 30-45 per cent of La 2 O 3 and ThO 2 with at least 19 per cent La 2 O 3 and 5 per cent ThO 2 , and 13-25 per cent of the oxides of duralent metals. Group 3. Refractive index approximately 1.75, and dispersive index approximately 44, with 25-33 per cent of La 2 O 3 , 15-20 per cent of WO 3 , 10-15 per cent ThO 2 , 25-30 per cent B 2 O 3 , and 10-15 per cent of at least one of CaO, ZnO, SnO 2 . Several examples are given.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2318246A GB615286A (en) | 1946-08-03 | 1946-08-03 | New or improved optical glasses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2318246A GB615286A (en) | 1946-08-03 | 1946-08-03 | New or improved optical glasses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB615286A true GB615286A (en) | 1949-01-04 |
Family
ID=10191483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2318246A Expired GB615286A (en) | 1946-08-03 | 1946-08-03 | New or improved optical glasses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB615286A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2971854A (en) * | 1957-05-23 | 1961-02-14 | Jenaer Glaswerk Schott & Gen | Optical glass |
US3074805A (en) * | 1958-01-25 | 1963-01-22 | Jenaer Glaswerk Schott & Gen | Optical glass |
US3082101A (en) * | 1957-11-16 | 1963-03-19 | Jenaer Glaswerk Schott & Gen | Optical glass |
-
1946
- 1946-08-03 GB GB2318246A patent/GB615286A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2971854A (en) * | 1957-05-23 | 1961-02-14 | Jenaer Glaswerk Schott & Gen | Optical glass |
US3082101A (en) * | 1957-11-16 | 1963-03-19 | Jenaer Glaswerk Schott & Gen | Optical glass |
US3074805A (en) * | 1958-01-25 | 1963-01-22 | Jenaer Glaswerk Schott & Gen | Optical glass |
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