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An optical system consisting of an arrangement of birefringent prisms and electrooptic cells is discussed. Polarized, collimated light travels through the system at angles which are functions of digitally coded voltages applied to the cells. Conventional design problems of electrooptical systems are briefly considered: these are transmission, fabrication errors, electrode placement, defects in crystal structure, electrical power consumption, and choice of electrooptic cell type. Unconventional design problems arise from errors in electrooptic cell retardation and alignment of crystal axes. The magnitude of these errors is evaluated for a 220 channel system scanning a photographic plate and establishes feasibility of such a system.
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Lee et al. (1964) studied this question.
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