Abstract

A telescope having a 2° field of view and an optical system with a 165° inside-out, quasi-stigmatic field of view, which has been axially integrated to be mutually nonobscuring and confocal, is described. Navigation and guidance application requirements of space vehicles from which the optical specifications have been derived are discussed. The narrow-field system is a Schmidt-Cassegrain telescope of unusually short length as dictated by the requirements. A semiautomatic lens design program for the IBM 7090 computer developed by coauthor Willey was used in the optimization of the optical design. The final optical performance predictions are shown and have been essentially supported by the performance of the prototype unit which was constructed.

© 1963 Optical Society of America

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