GB1028651A - Improvements in or relating to optical arrangements especially for producing scanning light beams - Google Patents
Improvements in or relating to optical arrangements especially for producing scanning light beamsInfo
- Publication number
- GB1028651A GB1028651A GB420962A GB420962A GB1028651A GB 1028651 A GB1028651 A GB 1028651A GB 420962 A GB420962 A GB 420962A GB 420962 A GB420962 A GB 420962A GB 1028651 A GB1028651 A GB 1028651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- screen
- target
- scanning light
- scanning
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
1,028,651. Television. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 4, 1963 [Feb. 2, 1962], No. 4209/62. Heading H4F. [Also in Division H1] An arrangement for producing a scanning light beam comprises a cathode-ray tube having a flat luminescent screen 6 scanned by an electron beam to produce light which is projected through a light transparent member 2 forming part of, or structurally combined with, the tube envelope and having a planar outer surface 9 inclined to the screen so that optical aberrations which would otherwise arise at a target 8 which is not coaxial with the screen, due to oblique passage of light through the tube envelope, are reduced. The prism 2 shown, may be replaced by a plurality of wedges having parallel surfaces from which the light proceeds. In alternative arrangements, Figs. 3-6 (not shown), the luminescent screen 15 is spaced from a planar envelope wall portion 16 through which the scanning light beam is projected, wall portion 16 being perpendicular to the optical axis and inclined to screen 15. Also, the luminescent screen may be inclined to the electron gun axis so that " Keystone " distortion is introduced into the scanning raster, which distortion is cancelled at the light-scanned target by suitable relative dispostiion of the cathode-ray tube and target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB420962A GB1028651A (en) | 1962-02-02 | 1962-02-02 | Improvements in or relating to optical arrangements especially for producing scanning light beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB420962A GB1028651A (en) | 1962-02-02 | 1962-02-02 | Improvements in or relating to optical arrangements especially for producing scanning light beams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1028651A true GB1028651A (en) | 1966-05-04 |
Family
ID=9772794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB420962A Expired GB1028651A (en) | 1962-02-02 | 1962-02-02 | Improvements in or relating to optical arrangements especially for producing scanning light beams |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1028651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2133211A (en) * | 1982-12-08 | 1984-07-18 | Hitachi Ltd | CRT display device |
-
1962
- 1962-02-02 GB GB420962A patent/GB1028651A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2133211A (en) * | 1982-12-08 | 1984-07-18 | Hitachi Ltd | CRT display device |
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