FIELD: optical instrumentation. SUBSTANCE: catadioptric lens includes correction element fabricated in the form of biconvex lens with different radii of curvature, primary mirror and secondary mirror made in the form of negative or positive mirror on central part of surface of correction element facing object. EFFECT: facilitated manufacture, enhanced operational characteristics. 1 dwg
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Authors
Dates
1997-05-27—Published
1993-01-11—Filed