Dustproof view finder

Details Dustproof view finder Dustproof view finder

1995-10-03

1998-12-29

Metjahic, Safet

Photography

With viewfinder

Lens detail

396373, G03B 1302

Patent

active

RE0360180

ABSTRACT:
A dustproof view finder in which an image formed by an objective optical system is made erect by an image erecting optical system and is observed through an ocular optical system as an erect image, the optical system including a pair of front and rear optical elements spaced from one another at a predetermined distance to define an aerial space therebetween, and a seal member which encloses the aerial space.

REFERENCES:
patent: 3915552 (1975-10-01), Rickert
patent: 4119985 (1978-10-01), Ando et al.
patent: 4209247 (1980-06-01), Urano et al.
patent: 4294529 (1981-10-01), Sato et al.
patent: 4381892 (1983-05-01), Someya
patent: 4452522 (1984-06-01), Murakami et al.
patent: 4705374 (1987-11-01), Robings
patent: 4969723 (1990-11-01), Kato et al.
United Kingdom Search Report, dated Mar. 18, 1992.
English Translation of German Office Action, dated Jan. 26, 1993.

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