Optics: motion pictures – Removable film strip magazine type
Patent
1977-08-05
1979-10-23
Gonzales, John
Optics: motion pictures
Removable film strip magazine type
352171, 354289, G03B 1306, G03B 1720
Patent
active
041718968
ABSTRACT:
In the disclosed camera, an SLR viewfinder displays exposure conditions by means of a translucent indicia carrier adjacent the focusing plate which defines the field of view of the finder. A light source illuminates the translucent indicia carrier and its light is passed by suitable lenses to a viewer. Ghost images of the indicia indications, which might be caused by indicia image light beams being internally reflected by the plate and lenses, are effectively eliminated by an optical deflector that orients light from the source along an optical axis parallel to or away from the light passing through the focusing plate's field of view. According to one embodiment of the invention, the light deflector is a prism. According to another, it is a mirror.
REFERENCES:
patent: 3590703 (1971-07-01), Ono
patent: 3630134 (1971-12-01), Nakamura
Ono Yukiharu
Sato Yasuhisa
Tajima Akira
Canon Kabushiki Kaisha
Gonzales John
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