Real image type of finder

Details Real image type of finder Real image type of finder

1996-12-24

1998-10-13

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having direct viewfinder

396 88, 396296, 396377, 396379, 396386, 396382, G03B 1304, G03B 1310, G03B 1314

Patent

active

058226265

ABSTRACT:
A viewfinder has an objective optical system and an eyepiece optical system. The viewfinder includes a supporting member which supports at least a part of either the objective optical system or the eyepiece optical system. The viewfinder further includes a hollow member provided separately from the supporting member. The hollow member is positioned in an optical path of the viewfinder such that a focal plane of the objective optical system is located in the hollow member. The viewfinder further includes a first transparent member secured to one end of the hollow member so as to face toward the objective optical system, and a second transparent member secured to another end of the hollow member so as to face toward the eyepiece optical system. An enclosed space in which the focal plane is located is formed by the first transparent member, the second transparent member and the hollow member.

REFERENCES:
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patent: 5122820 (1992-06-01), Pagano et al.
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patent: 5296877 (1994-03-01), Sato
patent: 5335030 (1994-08-01), Suzuka
patent: 5345287 (1994-09-01), Taguchi
patent: 5463438 (1995-10-01), Kosako
patent: 5628037 (1997-05-01), Tsuyuki et al.

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