| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a spatial light propagation simulator which permits an experiment system to be built easily and can also reduce costs even when test is carried out for a plurality of different spatial propagation distances. <P>SOLUTION: The spatial light propagation simulator comprises a lens which is disposed so as to simulate the received light of transmit laser beams propagated to a far field in a spatial optical communication system having an optical transmitter which emits transmit laser beams and an optical receiver located in a far field region of emitted transmit laser beams, and to have transmit laser beams emitted from the optical transmitter incident thereupon; a light position detector which outputs an electric signal corresponding to the position of transmit laser beams formed into an image by a lens disposed at a focal surface position of the lens; a signal processing device which calculates the directional angle of transmit laser beams from the electric signal output by the light position detector and then sends it out; and an optical intensity variable device disposed in the optical path of transmit laser beams, which varies the transmission intensity of transmit laser beams at the request of the signal processing device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
