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All-Reflective Four-Element Zoom Telescope: Design and Analysis

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Abstract

The use of all-reflective optical systems has exploded within the past decade largely due to the growth of the infrared community. With today’s design and manufacturing technology, non-traditional designs are more easily realized leading to higher quality collimators, resonators, and imagers. Nevertheless, in one area reflective technology has not kept pace - the area of zoom optical systems. This is due to several factors: difficulty of design, potentially low throughput, alignment problems, and the opto-mechanical challenge of accurately zooming relatively large reflective elements. These problems can, however, be overcome with appropriate application of today’s technology. The design process for such an all-reflective zoom telescope is presented. Fabrication, alignment, and evaluation of the system is described in a separate paper.

© 1990 Optical Society of America

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