Double mirror catadioptric objective lens system with three optical surface multifunction component
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United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
Sep 26, 2000
filing date -
Sep 28, 1999
priority date (Note) -
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Abstract
A double mirror objective lens system uses a three optical surface refractor incorporating a convex mirror into a right surface thereof that reflects incident light to a concave mirror, which reflects the light back through the refractor and on toward a focal point of the system. This arrangement yields better resolution images with low spherical aberration, minimal chromatic aberration, and long working distance. A variation of the invention includes another refractor, a right surface of which carries the concave mirror to form a Mangin mirror. This variation on of the invention has even less aberration over increased wavelength range due to better corrected chromatic aberration.
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