Accession Number : ADD000737
Title : Wide Angle Single Channel Projection Apparatus.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Dykes,Wily C
Report Date : 08 Apr 1974
Pagination or Media Count : 14
Abstract : The patent application uses a vertically positioned arc lamp and associated lamp collector-reflector in conjunction with depending associated secondary and projection mirrors, the projection mirror being convex and centrally apertured to form an exit pupil closely adjacent and above the head of an observer and in the center of a curved projection screen to minimize perspective distortion of image as seen by the viewer. The invention further provides an elimination of shadow effect by the depending relationship of the apparatus and by the recessing of arc lamp electrode through an aperture in the lamp reflector. An adaption of image spacing by recessed fitting of image on film to adapt the film to intended projector image width is also an aspect of the invention.
Descriptors : *Display systems, Patents, Projection, Wide angles, Mirrors, Screens(Displays), Scenes
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE