GB1448015A - Cathode ray tubes - Google Patents
Cathode ray tubesInfo
- Publication number
- GB1448015A GB1448015A GB4382473A GB4382473A GB1448015A GB 1448015 A GB1448015 A GB 1448015A GB 4382473 A GB4382473 A GB 4382473A GB 4382473 A GB4382473 A GB 4382473A GB 1448015 A GB1448015 A GB 1448015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gun
- axis
- principal axis
- cathode
- magnetic
- 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
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
- H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
- H01J31/38—Tubes with photoconductive screen, e.g. vidicon
-
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
1448015 Cathode-ray tubes RCA CORPORATION 18 Sept 1973 [18 Sept 1972] 43824/73 Heading H1D In a cathode-ray tube having a magnetic focussing field which defines a principal axis, and an electron gun having a cathode and a plurality of electrodes defining a gun axis, the gun is spaced from the principal axis and is disposed so that the gun axis is both tilted and twisted with respect to the principal axis; by suitable choice of the tilt and skew angles of the gun axis with respect to the principal axis, compensation for the effect of the radial variation of the magnetic focusing field may be effected, to permit normal incidence of a scanned beam from the gun on a target disposed perpendicular to the principal axis. The Specification refers to tilt angles in the range 2 to 6 degrees and skew angles in the range 1 to 4 degrees, and to tubes incorporating a plurality of such off-axis obliquely directed guns, or such a gun together with an on-axis gun. A two-gun vidicon colour pick-up tube is described, Figs. 1 and 2, having two such guns 32a and 32b, a focusing solenoid and magnetic scan system 58, and a two-part target formed by a pair of semi-circular tin oxide signal electrode layers 24, Fig. 2, spaced from one another by 0À65 mm., both layers and the intervening space being coated with antimony trisulphide photoconductor. Each gun scans the photoconduotor above a respective one of the signal electrodes, the signals from which are taken off via a corresponding pair of aluminium contact layers 20 connected to conductive glass frit buttons 22 sealed through the faceplate. The annular focusing electrode 48 acts also as a getter fixture.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28978072A | 1972-09-18 | 1972-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1448015A true GB1448015A (en) | 1976-09-02 |
Family
ID=23113062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4382473A Expired GB1448015A (en) | 1972-09-18 | 1973-09-18 | Cathode ray tubes |
Country Status (10)
Country | Link |
---|---|
US (1) | US3783326A (en) |
JP (1) | JPS528214B2 (en) |
CA (1) | CA979473A (en) |
DD (1) | DD105936A5 (en) |
DE (1) | DE2347264A1 (en) |
FR (1) | FR2200615B1 (en) |
GB (1) | GB1448015A (en) |
IT (1) | IT990885B (en) |
NL (1) | NL7312773A (en) |
SE (1) | SE381130B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55155452A (en) * | 1979-05-23 | 1980-12-03 | Hitachi Ltd | Camera tube target |
NL8006123A (en) * | 1980-11-10 | 1982-06-01 | Philips Nv | CATHED BEAM TUBE. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2734147A (en) * | 1956-02-07 | beckers | ||
US2563500A (en) * | 1951-08-07 | Plural beam tube | ||
JPS4819097B1 (en) * | 1969-07-23 | 1973-06-11 |
-
1972
- 1972-09-18 US US00289780A patent/US3783326A/en not_active Expired - Lifetime
-
1973
- 1973-07-03 IT IT26133/73A patent/IT990885B/en active
- 1973-08-15 CA CA178,852A patent/CA979473A/en not_active Expired
- 1973-08-31 SE SE7311894A patent/SE381130B/en unknown
- 1973-09-17 FR FR7333241A patent/FR2200615B1/fr not_active Expired
- 1973-09-17 JP JP48104857A patent/JPS528214B2/ja not_active Expired
- 1973-09-17 NL NL7312773A patent/NL7312773A/xx unknown
- 1973-09-17 DD DD173518A patent/DD105936A5/xx unknown
- 1973-09-18 DE DE19732347264 patent/DE2347264A1/en active Pending
- 1973-09-18 GB GB4382473A patent/GB1448015A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS528214B2 (en) | 1977-03-08 |
DE2347264A1 (en) | 1974-03-28 |
US3783326A (en) | 1974-01-01 |
DD105936A5 (en) | 1974-05-12 |
FR2200615A1 (en) | 1974-04-19 |
FR2200615B1 (en) | 1976-06-18 |
AU6035973A (en) | 1975-03-20 |
SE381130B (en) | 1975-11-24 |
IT990885B (en) | 1975-07-10 |
CA979473A (en) | 1975-12-09 |
NL7312773A (en) | 1974-03-20 |
JPS4970530A (en) | 1974-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |