GB423132A - Improvements in light filters - Google Patents
Improvements in light filtersInfo
- Publication number
- GB423132A GB423132A GB3746/34A GB374634A GB423132A GB 423132 A GB423132 A GB 423132A GB 3746/34 A GB3746/34 A GB 3746/34A GB 374634 A GB374634 A GB 374634A GB 423132 A GB423132 A GB 423132A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- light
- feb
- neodymium
- light 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
-
- 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
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight 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
- C03C4/00—Compositions for glass with special properties
- C03C4/005—Compositions for glass with special properties for opaline glass
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)
- Crystals, And After-Treatments Of Crystals (AREA)
- Luminescent Compositions (AREA)
Abstract
423,132. Glass manufacture. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) Feb. 5, 1934, No. 3746. Convention date, Feb. 24, 1933. [Class 56] Relates to light filters, particularly bulbs for electric lamps, made from glass which contains neodymium, or other rare earth having similar absorptive properties. According to the invention, the glass also contains light-scattering material, so that the distance traversed by the light passing through the glass is increased, and the quantity of neodymium or the like required to obtain a particular absorptive effect is reduced. Suitable scattering - materials are cryolite, calcium fluoride, or sodium silicofluoride.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE423132X | 1933-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB423132A true GB423132A (en) | 1935-01-25 |
Family
ID=6468302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3746/34A Expired GB423132A (en) | 1933-02-24 | 1934-02-05 | Improvements in light filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB423132A (en) |
-
1934
- 1934-02-05 GB GB3746/34A patent/GB423132A/en not_active Expired
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