1
David R Shafer, Abe Offner, Rama Singh: Optical relay system with magnification. The Perkin Elmer Corporation, Thomas P Murphy, Edwin T Grimes, Francis L Masselle, May 31, 1988: US04747678 (76 worldwide citation)

There is disclosed a ring field relay optical system incorporating concave spherical mirrors and including magnification achieved, at least partially, by a convex spherical mirror. In further modifications, aberrations introduced by the convex mirror are controlled by lens groups formed from fused s ...


2
Fuad Doany, Derek B Dove, Rama Singh, Alan Rosenbluth, George Chiu, Thomas Cipolla, Janusz Wilczynski: Efficient optical system for a high resolution projection display employing reflection light valves. International Business Machines Corporation, Scully Scott Murphy & Presser, April 15, 1997: US05621486 (43 worldwide citation)

An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system having a light tunnel, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for ...