Optical system for photographing device

Details Optical system for photographing device Optical system for photographing device

1998-01-20

1999-04-13

Perkey, W. B.

Photography

With viewfinder

With prism

396386, G03B 1302

Patent

active

058936530

ABSTRACT:
An optical system comprising a photographing optical system, a light splitting element to split a light incident from an object, and a finder optical system to which the light split by the light splitting element is directed. A surface of the light splitting element is constituted as a ghost prevention surface that prevents light incident on the finder optical system from the eye side from being reflected, thereby preventing the ghost light (i.e., the light which affects the object image) from being incident on an image pickup surface. Alternatively, a wall surface of a casing of the optical system is employed as a ghost prevention surface.

REFERENCES:
patent: 4386835 (1983-06-01), Inoue
patent: 4531054 (1985-07-01), Suzuki
patent: 4626918 (1986-12-01), Morisawa
patent: 4947198 (1990-08-01), Inanobe et al.
patent: 5604638 (1997-02-01), Nomura
patent: 5668674 (1997-09-01), Kanai et al.
patent: 5706051 (1998-01-01), Mogamiya

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