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Free space optics communication and free space optics communication system

  • US 20040042717A1
  • Filed: 08/28/2003
  • Published: 03/04/2004
  • Est. Priority Date: 08/30/2002
  • Status: Active Grant
First Claim
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1. A free space optics communication apparatus which performs communication with another apparatus with light beams, comprising:

  • a plurality of light-emitting units, each of the units emitting a light beam which forms a generally elliptical irradiation pattern on the other apparatus, wherein the plurality of light-emitting units are set such that irradiation patterns of light beams from at least two of the plurality of light-emitting units partially overlap at a light-receiving unit of the other apparatus, and a width of a combined irradiation pattern formed by combining the light beams from the plurality of light-emitting units in a shorter diameter direction of an irradiation pattern of a light beam from one of the plurality of light-emitting units is 1.5 times or more larger than a width in the shorter diameter direction of the irradiation pattern of the light beam from the one light-emitting unit.

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