G - Physics – 03 – B
Patent
G - Physics
03
B
88/72
G03B 21/11 (2006.01)
Patent
CA 1089265
VIEWING APPARATUS FOR MICRODOCUMENTS Abstract of the Disclosure A compact microimage viewing apparatus is disclosed which utilizes a low intensity light source with wide-angle projection optics to provide a clear and highly illuminated image to the viewer. To achieve compactness, the high bright- ness light-distributive screen of the viewing apparatus is located at an acute angle to the axis of projection of the pro- jection lens. Keystone distortion of the projected image is substantially eliminated by employing a correcting lens, preferably a Fresnel lens, between the screen and the viewer at a predetermined angle to the screen such that the image portion projected onto the edge of the screen nearest to the projection lens, which would otherwise appear smaller to the viewer than would the image portion projected onto the fathermost edge of the screen, is magnified to an extent that a rectangular and substantially non-distorted image is presented to the viewer.
273401
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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