GB514809A - Improvements in or relating to cathode-ray apparatus for the production of luminous images - Google Patents
Improvements in or relating to cathode-ray apparatus for the production of luminous imagesInfo
- Publication number
- GB514809A GB514809A GB16925/38A GB1692538A GB514809A GB 514809 A GB514809 A GB 514809A GB 16925/38 A GB16925/38 A GB 16925/38A GB 1692538 A GB1692538 A GB 1692538A GB 514809 A GB514809 A GB 514809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- projection screen
- cathode
- fluorescent
- tube
- fluorescent substance
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Luminescent Compositions (AREA)
Abstract
514,809. Luminescent materials. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. June 7, 1938, No. 16925. Convention date, June 9, 1937. [Class 39 (i)] The coloured image obtained on the fluorescent screen in a cathode ray tube is projected by an optical system on to a diffusing projection screen containing fluorescent material which, when subjected to radiation by the coloured image, fluoresces in a region or regions of the spectrum which jointly with the colour of the initial image, give a substantially white image. The fluorescent substance of the cathode-ray tube may be green-fluorescing zinc silicate and the fluorescent substance of the projection screen is orange- and red-fluorescing rhodamine. When the fluorescent material of the cathoderay tube is a mixture of calcium tungstate and magnesium silicate the fluorescent substance of the projection screen is fluorescein. A ground glass projection screen may be viewed on the side remote from the tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE203273X | 1937-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB514809A true GB514809A (en) | 1939-11-17 |
Family
ID=5775565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16925/38A Expired GB514809A (en) | 1937-06-09 | 1938-06-07 | Improvements in or relating to cathode-ray apparatus for the production of luminous images |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH203273A (en) |
| GB (1) | GB514809A (en) |
-
1938
- 1938-06-07 GB GB16925/38A patent/GB514809A/en not_active Expired
- 1938-06-08 CH CH203273D patent/CH203273A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH203273A (en) | 1939-02-28 |
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