Optical antenna and wireless optical system using the same
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United States of America Patent
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Dec 18, 2007
Grant Date -
Aug 11, 2005
app pub date -
Jul 20, 2004
filing date -
Jan 28, 2004
priority date (Note) -
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Abstract
A light concentrator for an optical antenna gradually narrows from the light receiving end to the end in contact with a light detector, and has a refractive index that gradually increases from the first to the second end, to afford a greater acceptance angle for the incoming optical signal. The increase may occur in stages of corresponding layers of the light concentrator, the layers being arranged in order of increase in refractive index from the first end to the second end.
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