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US4204752A Portable card motion picture viewer 失效
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Portable card motion picture viewer
摘要:
A photographic viewing system for use with a film unit having images formed in arcuate, or crescent-shaped, rows thereon. The system utilizes a fixed light source for directing light to a selected arcuate row of images which are to be sequentially viewed and an optics system moves along an arcuate path which corresponds to such selected arcuate row of images so as to produce sequential optical images representing the image on the film unit. A viewing means, such as a monocular eyepiece member or a projection system, provides for the viewing of the optical images that are so produced. The rate of image production is controlled by control of a variable speed motor by the operator. The overall system can be fabricated as a compact, lightweight hand-held unit.
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