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  1. DIRECT IMAGE VIEWER, SPECIFICATION FOR

    of rear projection diffusion screens, and the achievement of high magnification viewing qualities ... CIA-RDP78604747A001100010003-6 the viewer, or the diffraction characteristics of the gratings will produce a rainbow of images ... intensity lamps and the small f/number projection lens at the high magnification. Approved For Release ...

  2. DIRECT IMAGE VIEWER, SPECIFICATION FOR

    tion of performance limitations imposed by the use of rear projection diffusion screens, ... of the gratings will produce a rainbow of images between matrix units (exit pupil images). 3.4 Technical Details ... Compensation is pro- vided in the condensers, high intensity lamps and the small f/number projection lens ...