Microform reader with viewing screen

Details Microform reader with viewing screen Microform reader with viewing screen

G - Physics

03

B

88/73

G03B 21/11 (2006.01) G02B 7/04 (2006.01) G03B 13/26 (2006.01)

Patent

CA 1046317

ABSTRACT OF THE DISCLOSURE The disclosure relates to a microform reader apparatus of the type which projects a magnified image of an image film frame onto the rear side of a viewing screen to facilitate forward viewing of the magnified image. The microform reader of the present invention includes an adjust- able mirror assembly positioned between a light source and condensing lens for optimizing the brightness of the displayed image. In a preferred form the mirror assembly is adjustable from the front of the microform reader to allow simultaneous monitoring of the brightness of the display while the adjust- ment is being made. The microform reader of the present invention also includes an adjustable lens assembly which allows the optical axis of the lens assembly to be adjusted for perpendicularity to the image frame surface.

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