Optical apparatus having lens system change-over mechanism

Details Optical apparatus having lens system change-over mechanism Optical apparatus having lens system change-over mechanism

1996-06-19

1998-06-09

Gray, David M.

Photography

Having variable focal length of camera objective

Lens moves in or out of light path

359675, G02B 1502, G03B 1700

Patent

active

057650497

ABSTRACT:
An optical apparatus includes an optical unit which is arranged to be inserted into and retracted from an optical path, a fixed tube, and a restricting member which is disposed at the fixed tube and restricts a position of the optical unit in a direction of an optical axis thereof when the optical unit is in a state of being inserted into the optical path.

REFERENCES:
patent: 4214829 (1980-07-01), Ohashi
patent: 4482228 (1984-11-01), Fujita
patent: 4525050 (1985-06-01), Ohashi
patent: 4536068 (1985-08-01), Kodaira
patent: 4725864 (1988-02-01), Ogawa et al.
patent: 4887107 (1989-12-01), Nakamura et al.
patent: 5005038 (1991-04-01), Ogawa et al.
patent: 5086312 (1992-02-01), Tanaka et al.
patent: 5548446 (1996-08-01), Enomoto

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