Single lens reflex camera

Details Single lens reflex camera Single lens reflex camera

1989-01-12

1990-03-27

Adams, Russell E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354152, 358225, G03B 7099

Patent

active

049125001

ABSTRACT:
For a single lens reflex camera in which an image bearing beam from the photographic objective is reflected by a movable mirror to the finder system, techniques are disclosed that the mirror is made half-reflective, and the transmitted light of the mirror is conducted by a supplementary optical member consisting of, at least, a prism fixedly secured (not movable relative) to the mirror toward an image sensor such as that of a focus detector positioned outside the optical axes of the objective and finder, that the movable mirror is made to take a quite different direction of movement from that to which the reflected beam from the mirror goes, and that as an image pickup device such as CCD is arranged on the optical axis of the objective and behind the movable mirror, the optical characteristics of optical members such as a filter positioned in front of the image pickup device are made equivalent to those of the supplementary optical member.

REFERENCES:
patent: 3280714 (1966-10-01), Gunther et al.
patent: 3401614 (1968-09-01), Gunther et al.
patent: 3429246 (1969-02-01), Ebertz
patent: 3779146 (1973-12-01), Trankner
patent: 3911454 (1975-10-01), Ohmori
patent: 4171155 (1979-10-01), Jyojiki et al.
patent: 4252424 (1981-02-01), Imai et al.
patent: 4593312 (1986-06-01), Yamasaki
patent: 4626918 (1986-12-01), Morisawa

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