GB245336A - - Google Patents
Info
- Publication number
- GB245336A GB245336A GB245336DA GB245336A GB 245336 A GB245336 A GB 245336A GB 245336D A GB245336D A GB 245336DA GB 245336 A GB245336 A GB 245336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- thickness
- filters
- combined
- layer
- 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.)
- Active
Links
- 239000011521 glass Substances 0.000 abstract 7
- 239000002131 composite material Substances 0.000 abstract 2
- 239000001828 Gelatine Substances 0.000 abstract 1
- 238000004040 coloring Methods 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 235000019353 potassium silicate Nutrition 0.000 abstract 1
- 239000005315 stained glass Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/04—Additive processes using colour screens; Materials therefor; Preparing or processing such materials
- G03C7/06—Manufacture of colour screens
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Filters (AREA)
Abstract
245,336. Weisz, H. May 13, 1925. Colour filters. - For the purpose of ensuring that the glass plates for composite light filters can be combined into correct filters the quantity of colouring components added to the liquid glass in the process of manufacture is such that with a thickness of glass of 2 mm., the shade of colour agress with that of a layer of glass of a normal filter. This enables such glasses to be ground to a thickness of 2 mm., a thickness which renders negligible the influence of grinding inaccuracies on the correctness of the filter. In making a composite filter from such glasses ground in the usual manner they are combined so that a layer of glass below the correct thickness is combined with a layer of glass above the correct thickness. Coloured gelatine filters may be placed between two coloured glasses made as above.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB245336A true GB245336A (en) |
Family
ID=1738439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB245336D Active GB245336A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB245336A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2887010A (en) * | 1957-09-09 | 1959-05-19 | Ruettiger Justin | Neutral density filters |
| US3356439A (en) * | 1963-08-20 | 1967-12-05 | Finn H Magnus | Sun glasses having three pairs of different color tinted lenses |
-
0
- GB GB245336D patent/GB245336A/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2887010A (en) * | 1957-09-09 | 1959-05-19 | Ruettiger Justin | Neutral density filters |
| US3356439A (en) * | 1963-08-20 | 1967-12-05 | Finn H Magnus | Sun glasses having three pairs of different color tinted lenses |
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