Diffractive optical element and optical system having the same
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United States of America Patent
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Aug 30, 2005
Grant Date -
Aug 8, 2002
app pub date -
Sep 7, 2001
filing date -
Sep 8, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a diffractive optical element which includes a plurality of diffraction gratings being made of materials having different dispersions and being formed in accumulation, wherein at least one of the diffraction gratings has a varying grating thickness.
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