GB1135493A - Target assembly for television pickup tubes of the vidicon type - Google Patents

Target assembly for television pickup tubes of the vidicon type

Info

Publication number
GB1135493A
GB1135493A GB10535/66A GB1053566A GB1135493A GB 1135493 A GB1135493 A GB 1135493A GB 10535/66 A GB10535/66 A GB 10535/66A GB 1053566 A GB1053566 A GB 1053566A GB 1135493 A GB1135493 A GB 1135493A
Authority
GB
United Kingdom
Prior art keywords
layer
microns
photo
thickness
deposited
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
Application number
GB10535/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1135493A publication Critical patent/GB1135493A/en
Expired legal-status Critical Current

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
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Light Receiving Elements (AREA)

Abstract

1,135,493. Television pick-up tubes; photoconductive targets. WESTINGHOUSE ELECTRIC CORP. 10 March, 1966 [29 March, 1965], No. 10535/66. Headings H1D and H1K. A vidicon target comprises a transparent insulating film having a low dielectric constant deposited on a transparent conductive film and a double layer of photo-conductive material on the insulating film. A first deposited photoconductive coating comprises As 2 Se 3 , CdSe mixed with As 2 Se 3 , CdS mixed with As 2 Se 3 , or As 2 Se 2 S and has a thickness of about 0À2 to 0À3 microns to provide a porous layer having a density less than 10% of its normal bulk density. A second deposited photo-conductive coating comprises one of the above materials and is formed as a solid layer at approximately its normal bulk density, having a thickness of about 2 to 3 microns. The insulating layer may comprise cryolite (Na 3 AlF 6 ) having a dielectric constant of about 1À36 and has a thickness of 100 to 1500 angstroms. The conductive film, e.g. a tin compound or gold, is heated to a temperature of 100 to 250‹ C. and the cryolite evaporated on in a vacuum of about 10<SP>-6</SP> torr. The photo-conductive layers are then successively evaporated on, the first layer in an atmosphere of argon at a pressure of about 100 microns and the second layer in a vacuum of about 10<SP>-5</SP> torr.
GB10535/66A 1965-03-29 1966-03-10 Target assembly for television pickup tubes of the vidicon type Expired GB1135493A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443566A US3391297A (en) 1965-03-29 1965-03-29 Photoconductive target having arsenicselenium layers of different densities on cryolite layer

Publications (1)

Publication Number Publication Date
GB1135493A true GB1135493A (en) 1968-12-04

Family

ID=23761300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10535/66A Expired GB1135493A (en) 1965-03-29 1966-03-10 Target assembly for television pickup tubes of the vidicon type

Country Status (2)

Country Link
US (1) US3391297A (en)
GB (1) GB1135493A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517241A (en) * 1966-08-31 1970-06-23 Japan Broadcasting Corp Photoconductive target comprising aluminum,selenium and arsenic triselenide layers
US3697794A (en) * 1969-03-19 1972-10-10 Rca Corp Photocathode comprising layers of tin oxide, antimony oxide, and antimony
US3912370A (en) * 1974-05-31 1975-10-14 Rca Corp Ac deformable mirror light valve
JPS57197876A (en) * 1981-05-29 1982-12-04 Nippon Hoso Kyokai <Nhk> Photoconductive film

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE545266A (en) * 1955-02-18
NL197332A (en) * 1955-05-17
US3069551A (en) * 1957-05-16 1962-12-18 Ass Elect Ind Woolwich Ltd Electrical apparatus for intensifying images
NL245561A (en) * 1958-12-22
US3213315A (en) * 1962-12-03 1965-10-19 Westinghouse Electric Corp High gain storage tube with bic target
US3268764A (en) * 1963-01-09 1966-08-23 Westinghouse Electric Corp Radiation sensitive device

Also Published As

Publication number Publication date
US3391297A (en) 1968-07-02

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