Image intensifier tube with optimized electrical insulation

Details Image intensifier tube with optimized electrical insulation Image intensifier tube with optimized electrical insulation

1991-08-07

1993-01-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313544, 313477R, H01J 3150, H01J 4006

Patent

active

051773503

ABSTRACT:
An apparatus for electrically insulating viewing windows in an image intensifier tube is disclosed. The mechanical parts which are located close to the window are electrically insulated with the metal parts being held at a high voltage and electrically insulated on the outside of the image intensifier by an insulating screen. The insulating screen includes electrically conductive layer 36 and an insulating layer 37 which separates the metal parts 20, 26 from the conductive layer. The conductive layer also forms an equipotential layer which is opposite the metal parts and thereby "freezes" the distribution of the electrical lines of force in the insulating screen 35.

REFERENCES:
patent: 3688146 (1972-08-01), Bouwers
patent: 3858050 (1974-12-01), Carlson
patent: 4045700 (1977-08-01), Wulff
patent: 4171480 (1979-10-01), Wulms
patent: 4245160 (1981-01-01), Harao
patent: 4825067 (1989-04-01), Kawamura et al.
patent: 4870473 (1989-09-01), Sugimori

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