Optics: image projectors – Target – map or navigation projection – With or for vehicle
Patent
1977-10-31
1979-11-20
Haroian, Harry N.
Optics: image projectors
Target, map or navigation projection
With or for vehicle
353 78, 353119, 353 26R, G03B 2111, G03B 2312
Patent
active
041748891
ABSTRACT:
A microfilm viewing monitor, that is adapted to illuminate and enlarge microphotographic material and display images thereof on a viewing screen, is provided for use in environments that include substantial ambient light. The monitor includes an improved illumination-display system in which the viewing screen comprises a two-element sandwich, including a Fresnel lens for receiving and converging illuminated image bearing light rays with a semi-specular lens for diffusing and focusing those rays, and an image enhancing lens positioned forwardly of the viewing screen operates to reduce the effect of ambient light, thereby providing for improved image resolution. For further image enhancement, the lens may be tinted, and cooperates with housing walls to provide a hood-like effect forwardly of the viewing screen. The viewing monitor preferably is for use in a motor vehicle, and may be arranged to assist the vehicle operator with route navigation. When so employed, the monitor is pivotly mounted for selective universal positioning, so as to be clearly viewable by the operator while he controls the movement of the vehicle.
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Haroian Harry N.
Lettvin Norman
Northern Engraving Company
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