Viewfinder device

Details Viewfinder device Viewfinder device

1995-03-30

1997-06-17

Gray, David M.

Photography

With viewfinder

Lens detail

396386, G03B 1308

Patent

active

056406320

ABSTRACT:
A viewfinder device includes a first prism unit and a second prism unit. The first prism unit includes an incident/reflecting surface 1-1 for receiving and allowing light from the objective lens to enter the first prism unit, a surface 1-2 for reflecting the light entering from the surface 1-1, and a surface 1-3 for reflecting the light reflected by the surface 1-2. The second prism unit includes an incident/reflecting surface 2-1 for receiving and allowing the light reflected by the surface 1-3 to enter the second prism, a surface 2-2 for reflecting the light entering the surface 2-1, and a surface 2-3 for reflecting the light reflected by the surface 2-2. The surface 2-1 reflects the light reflected by the surface 2-3, and the objective lens forms an image between the first prism unit and the second prism unit.

REFERENCES:
patent: 3286592 (1966-11-01), Wagner et al.
patent: 4708444 (1987-11-01), Tsuji
patent: 5091739 (1992-02-01), Kawamura
patent: 5095326 (1992-03-01), Nozaki et al.
patent: 5241337 (1993-08-01), Betensky et al.
patent: 5253005 (1993-10-01), Koyama et al.
patent: 5323264 (1994-06-01), Kato

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