Focusing glass and photographic system

Details Focusing glass and photographic system Focusing glass and photographic system

1997-02-18

1998-09-01

Blankenship, Howard B.

Photography

With exposure objective focusing means, focusing aid, or...

Having viewfinder

G03B 1324

Patent

active

058024069

ABSTRACT:
A focusing glass and photographic system employing the same are disclosed. The photographic system includes an objective lens operable to form a real image of an object. The focusing glass is adapted to be situated at the real-image position, and comprises a semitransparent region surrounding a fully transmissive photographic zone. The photographic zone defines a region of the field of view of the objective (the field of view being viewable on the focusing screen) defining the metes and bounds of a photographic image obtainable using the photographic system.

REFERENCES:
patent: 3827811 (1974-08-01), Kato et al.
patent: 4208115 (1980-06-01), Proske
patent: 5552845 (1996-09-01), Nagao et al.
U.S. application No. 08/667,601, Otaki et al., filed Jun. 21, 1996.

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