Television camera tube with electrostatic focusing

Details Television camera tube with electrostatic focusing Television camera tube with electrostatic focusing

1982-09-13

1984-01-24

LaRoche, Eugene R.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313390, 313414, 313439, 313449, 313460, H01J 3126, H01J 2974, H01J 2946

Patent

active

044279175

ABSTRACT:
A television camera tube with electrostatic focusing comprising a triode section at the first stage having a cathode a first grid and a second grid, an electrostatic focusing lens section at the next stage having a third, fourth and fifth grids of cylindrical electrode configuration, and a sixth grid with mesh electrode configuration at the last stage, these electrodes being coaxially arranged in a cylindrical glass envelope, the length of the fourth grid is greater than 1.15 times the inner diameter thereof but equal to or smaller than 2.30 times the inner diameter thereof.

REFERENCES:
patent: 3866079 (1975-02-01), Schut
patent: 3995194 (1976-11-01), Blacker, Jr. et al.
patent: 4169239 (1979-09-01), Ehata et al.
patent: 4178532 (1979-12-01), Fukuzawa et al.
Shichiri, "18 mm0 Electrostatic Focusing Camera Tube 20PE19", Toshiba Review, No. 117, Sep.-Oct. 1978, (313-389).

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