Concentrating and collecting optical system using concave toroidal reflectors
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United States of America Patent
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Nov 17, 1998
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Aug 3, 1992
priority date (Note) -
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Abstract
An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target.
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