Spatial light communication equipment comprising angle error detection and alignment units
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 15, 2004
Grant Date -
Jul 26, 2001
app pub date -
Jan 22, 2001
filing date -
Jan 20, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A spatial light communication equipment being capable of providing compatibility between two communication equipments placed opposite to each other and of providing, with simplified configurations, highly accurate seizure and tracking capability and excellent beam directivity for ultra-long-distance communication. Angular error in a receiving beam is detected by an angle detector disposed on an optical axis of light reflected by a first reflecting plane of a beam deflector and, based on detected results, an angle deflected by the beam deflector is corrected. The deflected angle of a transmitting beam is controlled by using a second reflecting plane which is a back-surface of the first reflecting plane of the beam deflector and an error being equivalent to angular error occurring in the receiving beam is accurately corrected to obtain correct direction of emittance of the transmitting beam by using a signal transmitting optical antenna having same magnification as signal receiving optical antenna has and having polarity being opposite to the signal receiving optical antenna.
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