GB1137685A – Photosensitive pickup tube including an electron multiplier
– Google Patents
GB1137685A – Photosensitive pickup tube including an electron multiplier
– Google Patents
Photosensitive pickup tube including an electron multiplier
Info
Publication number
GB1137685A
GB1137685A
GB15208/66A
GB1520866A
GB1137685A
GB 1137685 A
GB1137685 A
GB 1137685A
GB 15208/66 A
GB15208/66 A
GB 15208/66A
GB 1520866 A
GB1520866 A
GB 1520866A
GB 1137685 A
GB1137685 A
GB 1137685A
Authority
GB
United Kingdom
Prior art keywords
coating
cathode
organic material
nickel
dynode
Prior art date
1965-04-27
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
GB15208/66A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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.)
1965-04-27
Filing date
1966-04-05
Publication date
1968-12-27
1966-04-05
Application filed by RCA Corp, Radio Corporation of America
filed
Critical
RCA Corp
1968-12-27
Publication of GB1137685A
publication
Critical
patent/GB1137685A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
H01J43/04—Electron multipliers
H01J43/06—Electrode arrangements
H01J43/10—Dynodes
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
H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements
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
H01J31/36—Tubes with image amplification section, e.g. image-orthicon
Abstract
1,137,685. Cathode-ray tubes. RADIO CORPORATION OF AMERICA. 5 April, 1966 [27 April, 1965], No. 15208/66. Heading H1D. The first dynode of the electron multiplier in an image orthicon has the beam limiting aperture 32 facing the cathode 40 flared as shown, and coated with secondary electron inhibiting material, e.g. colloidal graphite or a carbon compound such as petroleum lubricating oil or grease, or a metal such as chromium, palladium or gold. Carbonates or oxides, e.g. of barium, strontium and calcium, emitted from the cathode 40 may react with a coating of organic material to produce a compound having a relatively low secondary emission ratio. The organic material may be applied by brushing or by causing the material to flow through the aperture 32 in liquid form under a differential pressure. Preferably the coating is porous; the coating of organic material may be rendered porous by sand-blasting. The coating thickness is at least about 200 Angstroms. The secondary emissive coating 38 of the dynode is a thin coating, e.g. about 100 Angstroms thick, of magnesium oxide. The surface of the nickel substrate 36 is highly smooth and this is accomplished by using a plating bath consisting of nickel sulphamate, boric acid and nickel chloride in de-ionized water.
GB15208/66A
1965-04-27
1966-04-05
Photosensitive pickup tube including an electron multiplier
Expired
GB1137685A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US451228A
US3346752A
(en)
1965-04-27
1965-04-27
Electron multiplier dynode having an aperture of reduced secondary emission
Publications (1)
Publication Number
Publication Date
GB1137685A
true
GB1137685A
(en)
1968-12-27
Family
ID=23791345
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB15208/66A
Expired
GB1137685A
(en)
1965-04-27
1966-04-05
Photosensitive pickup tube including an electron multiplier
Country Status (3)
Country
Link
US
(1)
US3346752A
(en)
DE
(1)
DE1564526B2
(en)
GB
(1)
GB1137685A
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3718836A
(en)
*
1970-11-18
1973-02-27
Itt
Multipactor ion generator
US4347458A
(en)
*
1980-03-26
1982-08-31
Rca Corporation
Photomultiplier tube having a gain modifying Nichrome dynode
GB2080016A
(en)
*
1980-07-09
1982-01-27
Philips Electronic Associated
Channel plate electron multiplier
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3201630A
(en)
*
1955-03-30
1965-08-17
Itt
Charge storage sheet with tapered apertures
US2955229A
(en)
*
1956-11-14
1960-10-04
Gen Electric
Secondary emission suppression in electron beam tubes
US2942132A
(en)
*
1957-10-02
1960-06-21
Rca Corp
Electron multiplier
US3252034A
(en)
*
1962-04-16
1966-05-17
Eitel Mccullough Inc
R-f window for high power electron tubes
1965
1965-04-27
US
US451228A
patent/US3346752A/en
not_active
Expired – Lifetime
1966
1966-04-05
GB
GB15208/66A
patent/GB1137685A/en
not_active
Expired
1966-04-20
DE
DE19661564526
patent/DE1564526B2/en
not_active
Withdrawn
Also Published As
Publication number
Publication date
DE1564526A1
(en)
1970-09-17
US3346752A
(en)
1967-10-10
DE1564526B2
(en)
1971-02-04
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None