Electromagnetic emission shielding of an image aperture opening

Details Electromagnetic emission shielding of an image aperture opening Electromagnetic emission shielding of an image aperture opening

1995-08-29

1997-07-22

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, 174 35MS, H01J 314

Patent

active

056506155

ABSTRACT:
A system for preventing the escape of electromagnetic emissions includes a metallic electromagnetic shield. The electromagnetic shield is placed substantially around an electronic subsystem. The metallic electromagnetic shield has an aperture opening to allow light reflected from an image to be incident upon a photosensor of the electronic subsystem. An aperture electromagnetic shield is placed over the aperture opening to allow light to pass therethrough and to reduce or eliminate electromagnetic emissions from escaping through the aperture opening.

REFERENCES:
patent: 4010343 (1977-03-01), Tanaka et al.
patent: 5053924 (1991-10-01), Kurgan
patent: 5164543 (1992-11-01), Benson et al.

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