Optical apparatus

Details Optical apparatus Optical apparatus

1998-01-21

1999-04-20

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

396 97, G03B 1336

Patent

active

058951296

ABSTRACT:
An optical apparatus has an optical system incorporating a plurality of lenses including at least one movable lens. The optical apparatus detects temperature information or humidity information concerning the temperature or humidity around a structural member of the optical system other than the lenses, and performs, based on the detected information, compensation for a shift of the focal position caused by a change in the temperature or humidity around the structural member.

REFERENCES:
patent: 4907867 (1990-03-01), Perrin et al.
patent: 4982216 (1991-01-01), Kudo et al.
patent: 5124738 (1992-06-01), Yamashita
patent: 5679946 (1997-10-01), Mukai et al.

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