Evaluation of a Compact Cassegrain Optical System
WEAPONS SYSTEMS RESEARCH LAB ADELAIDE (AUSTRALIA)
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A small Cassegrain optical system, with mirrors manufactured on an in-house aspheric surface generator, has been tested using visible radiation. The optical system performance was found to be limited by the relatively poor quality of the finish on the mirrors. It was also found that the design had to be modified to reduce stray light to acceptable levels, which reduced the effective aperture and degraded the diffraction limited resolution of the design. The resulting design may be suitable for those seeker applications requiring relatively low angular resolution from a small aperture, and in which small size and light weight are of paramount importance.