Finder optical system and electronic image pickup apparatus usin

Details Finder optical system and electronic image pickup apparatus usin Finder optical system and electronic image pickup apparatus usin

1997-05-23

1998-12-08

Perkey, W. B.

Photography

With viewfinder

Electronic

396382, 396386, 348333, 348341, G03B 1308, G03B 1720

Patent

active

058483080

ABSTRACT:
A finder optical system includes a photographing lens, an eyepiece having an optical axis substantially collinear with an optical axis of the photographing lens, and a relay optical system, including a relay lens system, disposed between the photographing lens and the eyepiece for optically connecting a primary focal plane of the photographing lens to a secondary focal plane disposed to be observed through the eyepiece. The relay lens system has an optical axis that is parallel with the optical axes of the photographing lens and the eyepiece, and the relay optical system includes a first pair of reflecting mirrors that relay the optical axis of the photographing lens to the optical axis of the relay lens system, and a second pair of reflecting mirrors that relay the optical axis of the relay lens system to the optical axis of the eyepiece.

REFERENCES:
patent: 4330797 (1982-05-01), Yokokawa et al.

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