GB1049383A - Ambient light trapping filter and method of making - Google Patents
Ambient light trapping filter and method of makingInfo
- Publication number
- GB1049383A GB1049383A GB2224163A GB2224163A GB1049383A GB 1049383 A GB1049383 A GB 1049383A GB 2224163 A GB2224163 A GB 2224163A GB 2224163 A GB2224163 A GB 2224163A GB 1049383 A GB1049383 A GB 1049383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid lines
- filter
- transparent sheet
- grid
- making
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/185—Luminescent screens measures against halo-phenomena
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1,049,383. Filters. DOUGLAS AIRCRAFT CO. June 4, 1963 [June 4, 1962], No. 22241/63. Heading G2J. [Also in Divisions G1 and H1] A filter as in Specification 1, 039, 151 in which a grid of lines is provided on both surfaces of a transparent sheet and a clear transparent sheet is interleaved between the sheets carrying the grid lines. As shown, a transparent sheet 10 has grid lines printed in registry on both surfaces by rollers 28, the registry being checked by a collimated beam of light 42 which passes through a selected area of the sheet and the intensity of which is measured on a photo-electric instrument 50. The filter is then formed by building alternate layers of sheets carrying the grid lines and clear sheets, the registration of the grid lines being checked in the manner set out above. The completed filter may be moulded to match the curvature of a cathode ray tube and be fixed thereto with a transparent cement (Fig. 6 not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19975562A | 1962-06-04 | 1962-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1049383A true GB1049383A (en) | 1966-11-23 |
Family
ID=22738888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2224163A Expired GB1049383A (en) | 1962-06-04 | 1963-06-04 | Ambient light trapping filter and method of making |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1049383A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2342651A1 (en) * | 1972-08-24 | 1974-03-14 | Sony Corp | CATHODE RAY TUBE |
| GB2161983A (en) * | 1984-07-16 | 1986-01-22 | Gen Electric | Contrast enhancement structure for color cathode ray tube |
| GB2161953A (en) * | 1984-06-22 | 1986-01-22 | Videocolor | Manufacturing a filter having a light transmission coefficient which varies over its surface |
-
1963
- 1963-06-04 GB GB2224163A patent/GB1049383A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2342651A1 (en) * | 1972-08-24 | 1974-03-14 | Sony Corp | CATHODE RAY TUBE |
| GB2161953A (en) * | 1984-06-22 | 1986-01-22 | Videocolor | Manufacturing a filter having a light transmission coefficient which varies over its surface |
| GB2161983A (en) * | 1984-07-16 | 1986-01-22 | Gen Electric | Contrast enhancement structure for color cathode ray tube |
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