GB966567A - Light filter - Google Patents
Light filterInfo
- Publication number
- GB966567A GB966567A GB16717/61A GB1671761A GB966567A GB 966567 A GB966567 A GB 966567A GB 16717/61 A GB16717/61 A GB 16717/61A GB 1671761 A GB1671761 A GB 1671761A GB 966567 A GB966567 A GB 966567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- glass
- ferrous
- ferrous oxide
- sufficient
- 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
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 8
- 229910000428 cobalt oxide Inorganic materials 0.000 abstract 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 239000005365 phosphate glass Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
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
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/226—Glass filters
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (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)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
A phosphate glass, light transmitting filter for an incandescent lighting unit comprises a glass containing 45-80% P2O5, up to 20% of at least one divalent metal oxide, 5-25% Al2O3, up to 30% SiO2, up to 20% B2O3 to which is added 1-5% ferrous oxide and 0.005-0.015% cobalt oxide on the basis of a 6 mm. thickness of glass, the ratio ferrous oxide to cobalt oxide being at least 150 : 1, the amount of ferrous oxide being sufficient to absorb the infra-red heat waves, and the cobalt oxide in combination with the ferrous oxide being sufficient to colour correct the transmitted light to simulate a colour source of at least 3500 DEG K and the chromatizing characteristics such that the "x" value is not greater than 0.40 and the "y" value not greater than 0.41.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29331A US3113033A (en) | 1960-05-16 | 1960-05-16 | Light filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB966567A true GB966567A (en) | 1964-08-12 |
Family
ID=21848501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16717/61A Expired GB966567A (en) | 1960-05-16 | 1961-05-08 | Light filter |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3113033A (en) |
| GB (1) | GB966567A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5240842A (en) * | 1975-09-29 | 1977-03-30 | Shinichi Matsuda | Ultrared light absorber |
| GB2196625A (en) * | 1986-09-25 | 1988-05-05 | Downing Nicholas Peter Damien | Ultra violet transmitting means |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1016441A (en) * | 1961-11-06 | 1966-01-12 | Pilkington Brothers Ltd | Improvements in or relating to the manufacture of heat absorbing glasses |
| GB1174475A (en) * | 1967-06-22 | 1969-12-17 | English Electric Co Ltd | Glass-Ceramics. |
| US3549554A (en) * | 1968-10-08 | 1970-12-22 | Westinghouse Electric Corp | Laser phosphate glass compositions |
| US3704928A (en) * | 1970-11-09 | 1972-12-05 | Sylvania Electric Prod | Dental light with dichroic and infrared filters |
| US5255029A (en) * | 1987-04-30 | 1993-10-19 | Nview Corporation | Liquid crystal display for projection systems |
| US5227821A (en) * | 1987-04-30 | 1993-07-13 | Nview Corporation | Liquid crystal display for projection systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE604146C (en) * | 1930-11-14 | 1934-10-15 | Jenaer Glaswerk Schott & Gen | Heat-absorbing glass |
| US2278501A (en) * | 1939-05-12 | 1942-04-07 | American Optical Corp | Glass composition and product thereof |
| BE461041A (en) * | 1941-09-15 | |||
| GB580873A (en) * | 1945-03-19 | 1946-09-23 | British Thomson Houston Co Ltd | Improved soft glass compositions |
| US2748006A (en) * | 1952-12-06 | 1956-05-29 | Bausch & Lomb | Optical glass |
| US2900264A (en) * | 1955-04-20 | 1959-08-18 | Libbey Owens Ford Glass Co | Method of changing glass composition |
-
1960
- 1960-05-16 US US29331A patent/US3113033A/en not_active Expired - Lifetime
-
1961
- 1961-05-08 GB GB16717/61A patent/GB966567A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5240842A (en) * | 1975-09-29 | 1977-03-30 | Shinichi Matsuda | Ultrared light absorber |
| GB2196625A (en) * | 1986-09-25 | 1988-05-05 | Downing Nicholas Peter Damien | Ultra violet transmitting means |
Also Published As
| Publication number | Publication date |
|---|---|
| US3113033A (en) | 1963-12-03 |
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