Optics: image projectors – Cabinet encloses projector and one side of screen – Focus or variable magnification
Patent
1990-04-16
1992-01-07
Cuchlinski, Jr., William A.
Optics: image projectors
Cabinet encloses projector and one side of screen
Focus or variable magnification
353122, 355 55, 355 63, 358451, G03B 2752
Patent
active
050784870
ABSTRACT:
A projecting apparatus comprises support device for supporting an original, a projection optical system for forming the image of the original, an optical element disposed on the image side of the projection optical system to cause a principal light ray having entered from the original through the projection optical system to travel in parallelism to the optic axis of the projection optical system, and control device for varying the imaging magnification of the original by the projection optical system with the spacing between the exit pupil of the projection optical system and the optical element being kept constant.
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Fukushima Hisashi
Takada Yoshihiro
Tateoka Masamichi
Toyono Tsutomu
Canon Kabushiki Kaisha
Cuchlinski Jr. William A.
Dowling William C.
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