Camera having a sub-mirror unit

Details Camera having a sub-mirror unit Camera having a sub-mirror unit

1994-04-14

1997-05-06

Metjahic, Safet

Photography

Having photocell at specific position within camera

Having two or more mirrors

396447, G03B 7099, G03B 1700

Patent

active

056280386

ABSTRACT:
A camera with a mirror device comprises a first mirror, i.e., a main mirror, device for reflecting object light, and a second mirror, i.e., a sub-mirror, device for reflecting light transmitted through the first mirror device to another device, i.e., a focus detector. The second mirror device has a reflective layer formed as a sub-mirror surface formed directly on a base member. With the sub-mirror surface formed by, e.g., evaporation directly on a partial protruded area of the base member, the manufacture process is facilitated, a sub-mirror area can be increased, and reliability and durability are improved because the sub-mirror will not experience variations in its mounting angle or be subject to peeling-off from a separate base member.

REFERENCES:
patent: 4963393 (1990-10-01), Goela et al.
patent: 5130740 (1992-07-01), Suda et al.
patent: 5436753 (1995-07-01), Hayakawa

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