Illumination device and optical processing apparatus using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 4, 2003
Grant Date -
N/A
app pub date -
May 5, 2000
filing date -
May 10, 1999
priority date (Note) -
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Abstract
An illumination system for illuminating a particular surface, to be illuminated, with light from a light source, includes a first optical component having an optical power with respect to a predetermined plane, and a second optical component having an optical power with respect to the predetermined plane, wherein the particular surface is illuminated through Koehler illumination with respect to a plane orthogonal to the predetermined plane and is illuminated approximately through critical illumination with respect to the predetermined plane, wherein the first and second optical components are adapted to provide an afocal system, and wherein the condition for the afocal system is disconnected when a relative position between the first and second optical components is changed, whereby an illumination range with respect to the predetermined plane, upon the particular surface, is changed.
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