Anti-flare structure for photographic optical system

Details Anti-flare structure for photographic optical system Anti-flare structure for photographic optical system

1975-10-09

1977-11-08

Griffin, Donald A.

G03B 1702

Patent

active

040578151

ABSTRACT:
The internal configuration of a rigid opaque exposure chamber structure for use in a reflex photographic optical system is disclosed. The structure is a plastic, injection molded member of unitary construction. Its interior preferably includes an arrangement for receiving a single snap-in side wall having a specularly reflecting surface which, in combination with specularly reflecting side walls of the housing, either direct unwanted radiation from outside the field of view of the system away from its film plane or, alternatively, absorbs it by reducing its intensity through multiple reflections so that the quality of a final photograph will not be impaired. Selected side walls include serrated light traps to enhance the overall performance of the structure in this respect.

REFERENCES:
patent: B559111 (1976-02-01), Wolcott
patent: 1479112 (1924-01-01), Sparks
patent: 2215271 (1940-09-01), May
patent: 2238371 (1941-04-01), Pollock
patent: 2557297 (1951-06-01), Lea
patent: 2652748 (1953-09-01), Croy
patent: 2665618 (1954-01-01), Heidecke
patent: 3581641 (1971-06-01), Nerwin
patent: 3630130 (1971-12-01), Erlichman
patent: 3759153 (1973-09-01), Aimo et al.

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