Real image type finder optical system

Details Real image type finder optical system Real image type finder optical system

1998-07-22

2000-09-26

Gray, David M.

Photography

Having camera indicator

Having display in viewfinder

396386, G03B 1720, G03B 1308

Patent

active

061252387

ABSTRACT:
Disclosed is a real image type finder optical system which is provided with an objective optical system having a positive power, an erecting optical system for erecting a reversed real image formed by the objective optical system, an eyepiece optical system for observing the real image formed by the objective optical system and erected by the erecting optical system, an information display element provided in the objective optical system, the information display element displaying information to be observed in a field of view of the finder optical system, and a partial mirror surface provided on an object side with respect to the information display element, the partial mirror allowing a part of light from the object to pass therethrough and reflecting light from the information display element towards the eyepiece optical system.

REFERENCES:
patent: 3575082 (1971-04-01), McClune
patent: 4429978 (1984-02-01), Ikari
patent: 5400101 (1995-03-01), Yoneyama et al.
patent: 5410430 (1995-04-01), Ito et al.
patent: 5754900 (1998-05-01), Suda
Copy of an English Language Translation of JP No. 9-113962, May 20, 1997.

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