Free space optics communication apparatus and free space...

Details Free space optics communication apparatus and free space... Free space optics communication apparatus and free space...

2003-08-28

2008-08-05

Leung, Christina Y (Department: 2613)

Optical communications

Optical communication over freee space

Transmitter and receiver

C398S201000

Reexamination Certificate

active

07409161

ABSTRACT:
A free space optics communication apparatus which can perform stable communication is disclosed. The free space optics communication apparatus has a plurality of light-emitting units each emitting a light beam which forms a generally elliptical irradiation pattern. The plurality of light-emitting units are set such that irradiation patterns of beams from at least two of the plurality of light-emitting units partially overlap at a light-receiving unit of the other apparatus. Further the width of a combined irradiation pattern formed by combining the light beams is 1.5 times or more larger than a width in a shorter diameter direction of an irradiation pattern of a light beam from one light-emitting unit.

REFERENCES:
patent: 4727600 (1988-02-01), Avakian
patent: 4753506 (1988-06-01), Einhorn et al.
patent: 5134426 (1992-07-01), Kataoka et al.
patent: 5359448 (1994-10-01), Laszlo et al.
patent: 5777768 (1998-07-01), Korevaar

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