Camera

Details Camera Camera

1996-08-26

1999-05-11

Adams, Russell E.

Photography

With viewfinder

396282, G03B13/02

Patent

active

059037881

ABSTRACT:
A subject image is formed on a focusing screen by a taking lens in a camera. The focusing screen is constituted by a liquid crystal whose light diffusion characteristic is variable. The light diffusion characteristic is varied according to an open aperture value of the taking lens which is attached to the camera.

REFERENCES:
patent: 3724349 (1973-04-01), von Belvard et al.
patent: 4208115 (1980-06-01), Proske
patent: 4441798 (1984-04-01), Watanabe et al.
patent: 4494853 (1985-01-01), Watanabe
patent: 4534639 (1985-08-01), Konishi et al.
patent: 5333031 (1994-07-01), Mukai

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