GB1502892A - Electrostatically focusing type image pick-up tubes and method of manufacturing the same - Google Patents

Electrostatically focusing type image pick-up tubes and method of manufacturing the same

Info

Publication number
GB1502892A
GB1502892A GB3113875A GB3113875A GB1502892A GB 1502892 A GB1502892 A GB 1502892A GB 3113875 A GB3113875 A GB 3113875A GB 3113875 A GB3113875 A GB 3113875A GB 1502892 A GB1502892 A GB 1502892A
Authority
GB
United Kingdom
Prior art keywords
electrodes
rods
electrode
image pick
tubes
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
GB3113875A
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1502892A publication Critical patent/GB1502892A/en
Expired legal-status Critical Current

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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • 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
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4824—Constructional arrangements of electrodes
    • H01J2229/4827—Electrodes formed on surface of common cylindrical support

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1502892 Image pick up tubes HITACHI Ltd 25 July 1975 [26 July 1974] 31138/75 Heading H1D An image pick up tube includes between the electron gun and the target 2 a focusing lens comprising 3 coaxial cylindrical electrodes 19, 22, 23 whose inner diameters decrease from the target. The electrodes are supported on glass rods 21 via tabs 20, 20a, 20b with the electrode ends overlapping. The rods have rectangular or oval cross-section. Electrode 23 may be of constant diameter or may be tapered. The gun includes first and second electrodes 7, 8 and an apertured electrode 8a attached to the second electrode. The electrodes 8a and 19 act as a prefocusing lens. The tube screen is photoconductive. The lens is assembled in a jig comprising a mandrel on which the electrodes fit, supports for the glass rods and gas heaters. The rods are heated and the supports stated to press the rods against the tabs 20 until the glass cools. Differences in heating, operational times and pressures applied to each rod must be kept within specified limits.
GB3113875A 1974-07-26 1975-07-25 Electrostatically focusing type image pick-up tubes and method of manufacturing the same Expired GB1502892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8514074A JPS5114216A (en) 1974-07-26 1974-07-26 SEIDENSHUSOKUGATASATSUZOKAN

Publications (1)

Publication Number Publication Date
GB1502892A true GB1502892A (en) 1978-03-08

Family

ID=13850340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3113875A Expired GB1502892A (en) 1974-07-26 1975-07-25 Electrostatically focusing type image pick-up tubes and method of manufacturing the same

Country Status (4)

Country Link
JP (1) JPS5114216A (en)
DE (1) DE2533744C3 (en)
FR (1) FR2280199A1 (en)
GB (1) GB1502892A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027037A2 (en) * 1979-10-03 1981-04-15 Hitachi, Ltd. Television camera tube with electrostatic focusing and magnetic deflection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563948A (en) * 1979-06-22 1981-01-16 Hitachi Ltd Electrostatic focusing type pickup tube

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322807A (en) * 1940-12-28 1943-06-29 Rca Corp Electron discharge device and system
GB1047337A (en) * 1963-08-14
US3295006A (en) * 1964-02-03 1966-12-27 Rca Corp Unannealed nickel screen grid mesh for pickup tubes
JPS445565Y1 (en) * 1966-02-21 1969-02-28
NL7115320A (en) * 1971-11-06 1973-05-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027037A2 (en) * 1979-10-03 1981-04-15 Hitachi, Ltd. Television camera tube with electrostatic focusing and magnetic deflection
EP0027037A3 (en) * 1979-10-03 1981-04-22 Hitachi, Ltd. Television camera tube with electrostatic focusing and magnetic deflection

Also Published As

Publication number Publication date
JPS5419129B2 (en) 1979-07-12
FR2280199A1 (en) 1976-02-20
DE2533744C3 (en) 1982-02-18
JPS5114216A (en) 1976-02-04
DE2533744B2 (en) 1981-04-23
FR2280199B1 (en) 1978-03-17
DE2533744A1 (en) 1976-02-12

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee