Rearview periscope comprised of two concave cylindrical mirrors.
Using novel ray-tracing techniques and methods of evaluation, optical devices comprised of two cylindrically concave mirrors have been designed and constructed which function satisfactorily as periscopic rearview systems. By following the design principles as described, mirror positions and curves are determinable which result in systems which are free of objectionable amounts of distortion and astigmatism over large fields of view. Comfortable binocular vision is obtainable along with latitude for movements of the observer's head. Examples of successful designs are given.
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