Viewfinder device enabling display of optional photographic info

Details Viewfinder device enabling display of optional photographic info Viewfinder device enabling display of optional photographic info

1998-09-29

2000-09-26

Mathews, Alan A.

Photography

Having camera indicator

Having display in viewfinder

396147, 396150, 396384, 396386, G03B 1720, G03B 1316, G03B 1324

Patent

active

061252395

ABSTRACT:
A viewfinder device that includes a screen on which an image is projected, and an eyepiece lens through which the image is viewed. An optical member passes light beams from the screen to the eyepiece lens through an information display member, and a diffraction optical element diffracts light beams in the direction of the eyepiece lens so that diffracted light beams from the information display member are superposed over the viewed image.

REFERENCES:
patent: 4200380 (1980-04-01), Sato et al.
patent: 4576458 (1986-03-01), Cho et al.

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