GB1451211A - Correcting lens having two effective surfaces - Google Patents
Correcting lens having two effective surfacesInfo
- Publication number
- GB1451211A GB1451211A GB4592573A GB4592573A GB1451211A GB 1451211 A GB1451211 A GB 1451211A GB 4592573 A GB4592573 A GB 4592573A GB 4592573 A GB4592573 A GB 4592573A GB 1451211 A GB1451211 A GB 1451211A
- Authority
- GB
- United Kingdom
- Prior art keywords
- divided
- strips
- misregister
- sectors
- oct
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
- H01J9/2272—Devices for carrying out the processes, e.g. light houses
- H01J9/2273—Auxiliary lenses and filters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1451211 Colour television tubes RCA CORPORATION 2 Oct 1973 [18 Oct 1972] 45925/73 Heading H1D An optical lens for use in the manufacture of the phosphor screen of a colour television tube has a first effective surface divided by boundaries of surface discontinuity into a plurality of elements, each of which is separately contoured to reduce misregister in the finished phosphor screen, and a second effective surface similarly divided and surface contoured to additionally reduce misregister. The first surface may be divided into parallel strips, Fig. 1, or sectors (Fig. 13, not shown) the second surface being divided into parallel strips, oriented perpendicular to the strips on the first face, if present, Figs. 1 and 2, or into annuli, (Fig. 12, not shown). The lens may be constructed from a single piece of glass or plastics material, or from a plurality of individual parts, e.g. strips, rings, or sectors Reference is made to the possibility of forming the two surfaces one on each of two discs, which are thereafter bonded together, or may be spaced apart.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29863772A | 1972-10-18 | 1972-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1451211A true GB1451211A (en) | 1976-09-29 |
Family
ID=23151370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4592573A Expired GB1451211A (en) | 1972-10-18 | 1973-10-02 | Correcting lens having two effective surfaces |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS4975157A (en) |
| AU (1) | AU472435B2 (en) |
| BE (1) | BE806153A (en) |
| CA (1) | CA1017181A (en) |
| FR (1) | FR2203981B1 (en) |
| GB (1) | GB1451211A (en) |
| IT (1) | IT995545B (en) |
| NL (1) | NL7314289A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1490345A (en) * | 1966-08-26 | 1967-07-28 | Rca Corp | Optical lenses |
| US3628850A (en) * | 1970-02-24 | 1971-12-21 | Hitachi Ltd | Correcting lens |
| JPS5149544B2 (en) * | 1972-01-19 | 1976-12-27 |
-
1973
- 1973-09-27 AU AU60807/73A patent/AU472435B2/en not_active Expired
- 1973-10-01 IT IT2961473A patent/IT995545B/en active
- 1973-10-02 GB GB4592573A patent/GB1451211A/en not_active Expired
- 1973-10-15 CA CA183,383A patent/CA1017181A/en not_active Expired
- 1973-10-15 FR FR7336734A patent/FR2203981B1/fr not_active Expired
- 1973-10-16 BE BE136758A patent/BE806153A/en unknown
- 1973-10-17 JP JP11675173A patent/JPS4975157A/ja active Pending
- 1973-10-17 NL NL7314289A patent/NL7314289A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE806153A (en) | 1974-02-15 |
| IT995545B (en) | 1975-11-20 |
| NL7314289A (en) | 1974-04-22 |
| FR2203981B1 (en) | 1978-06-30 |
| JPS4975157A (en) | 1974-07-19 |
| FR2203981A1 (en) | 1974-05-17 |
| DE2352364A1 (en) | 1974-05-09 |
| AU6080773A (en) | 1975-03-27 |
| DE2352364B2 (en) | 1977-02-03 |
| CA1017181A (en) | 1977-09-13 |
| AU472435B2 (en) | 1976-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BR7308792D0 (en) | STRUCTURE MANUFACTURING PROCESS FOR CATHODIC RAY PICTURE SCREEN | |
| CA998730A (en) | Cathode ray tube face panel with optical filter | |
| CA956819A (en) | Projection screen | |
| CA962535A (en) | Method of manufacturing display screens for cathode-ray tubes | |
| AU471985B2 (en) | A projection viewer | |
| GB1451211A (en) | Correcting lens having two effective surfaces | |
| CA987724A (en) | Method of manufacturing an implosion-free picture tube for television display and implosion-free picture tube manufactured by said method | |
| CA963070A (en) | Luminescent screen assemblies for post-deflection focusing type color picture tubes | |
| ES418656A1 (en) | Optical multiple projector | |
| CA963068A (en) | Electron gun assembly with improved unitary lens system | |
| GB1450589A (en) | Correcting lens | |
| CA991001A (en) | Method for manufacturing the picture display screen of a colour television tube | |
| GB1450590A (en) | Correcting lens | |
| IL40456A0 (en) | Colour cathode ray kinescope tube and method of fabricating the same | |
| CA948765A (en) | Continuous television film projection system | |
| CA946455A (en) | Cathode-ray tube having electrostatic focusing and electrostatic deflection in one lens | |
| CA926974A (en) | Cathode ray display system | |
| AU4461972A (en) | Colour picture cathode ray tube | |
| CA977781A (en) | Glass for television display cathode-ray tubes | |
| CA1014597A (en) | Optical alignment on vacuum plenum | |
| DK118900B (en) | Method for manufacturing monitors for color image reproducing cathode ray tubes. | |
| CA993423A (en) | Cathode ray tubes with target screen and the manufacture thereof | |
| CA943618A (en) | Cathode ray tubes with target screen and the manufacture thereof | |
| CA880838A (en) | Method of manufacturing picture screens for cathode ray tubes | |
| AU469835B2 (en) | Bear projection viewer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 48A | Specification amended by disclaimer (sect. 8/1949) | ||
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |