Electromagnetic interference shielding device for image intensif

Details Electromagnetic interference shielding device for image intensif Electromagnetic interference shielding device for image intensif

1990-08-13

1992-06-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

174 35R, H01J 3150, H01J 4014

Patent

active

051189259

ABSTRACT:
A device for shielding an image intensifier from electromagnetic interference which includes a hollow conductive mantle surrounding the image intensifier and over the end except for light input and output windows. It is adapted to be electrically connected to a ground reference potential for diverting electromagnetic interference to the ground reference potential, and in this capacity, functions as a Faraday cage. The mantle contains a conductive plate, preferably in the form of a sleeve, affixed within it. The conductive plate is insulated from the mantle by a layer of dielectric substance. The conductive plate is adapted to be electrically connected with an input lead for powering the image intensifier; the conductive member, the interposed dielectric substance and the mantle comprising a bypass capacitor for the input power lead.

REFERENCES:
patent: 4245160 (1981-01-01), Harao
patent: 4709140 (1987-11-01), Oba
patent: 4924080 (1990-05-01), Caserta et al.

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