Ballistic protected periscope construction

Details Ballistic protected periscope construction Ballistic protected periscope construction

1976-06-21

1977-12-27

Evans, F. L.

350287, G02B 508

Patent

active

040652068

ABSTRACT:
A pair of transparent prismatic-shaped blocks are mounted within a protective housing which extends through an opening in an armored vehicle for safely viewing an exterior field of view from within the protected vehicle. Each of the blocks has a reflective surface and a viewing surface and are separated from each other by a void. The void is filled with an optical adhesive which remains soft and pliable and which bonds the pair of blocks together in this spaced relationship. The adhesive provides a shock isolation effect between the transparent block which is exposed to shock from enemy gunfire, etc., and the other block located within the vehicle. The cushioned adhesive-filled void reduces transmission of the shock waves between the blocks and prevents foreign objects from entering the void and distorting the optical viewing system. Alternately, the void may be filled with a laminate consisting of a plurality of layers of such cushioning adhesive and intervening transparent blocks or strips of solid material.

REFERENCES:
patent: 2361050 (1944-10-01), Paddock
patent: 3505160 (1970-04-01), Michaels et al.
patent: 3799817 (1974-03-01), Van Laethem

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