Abstract: A free space optics communication apparatus which achieves high use efficiency of light and enables free control of the divergent angle of a light beam and the like is disclosed. The free space optics communication apparatus of the present invention has a light source which emits a light beam for performing wireless communication of information, and a minute mirror array unit which consists of a plurality of minute mirrors arranged in a matrix-like form and reflects the light beam emitted from the light source toward another apparatus. The apparatus also has a control unit which controls the directions of the individual minute mirrors constituting the minute mirror array unit independently. The control unit may be used to variably control the number of a plurality of mirror groups formed of a plurality of the minute mirrors in the minute mirror array unit.

Abstract: Optical space transmission device including a light source for emitting a light beam modulated according to a signal to be transmitted, an optical system for sending out the light beam emitted from the light source as a transmission light beam with an angle of expansion, a temperature detector for detecting the internal temperature of the device, and control means for changing the angle of expansion of the transmission light beam as a function of the temperature detected by the temperature detector.

Abstract: A free space optics communication apparatus which achieves high use efficiency of light and enables free control of the divergent angle of a light beam and the like is disclosed. The free space optics communication apparatus of the present invention has a light source which emits a light beam for performing wireless communication of information, and a minute mirror array unit which consists of a plurality of minute mirrors arranged in a matrix-like form and reflects the light beam emitted from the light source toward another apparatus. The apparatus also has a control unit which controls the directions of the individual minute mirrors constituting the minute mirror array unit independently. The control unit may be used to variably control the number of a plurality of mirror groups formed of a plurality of the minute mirrors in the minute mirror array unit.

Abstract: An optical space transmission device comprises a light source for emitting a light beam modulated according to a signal to be transmitted, an optical system for sending out the light beam emitted from the light source as transmission light beam with an angle of expansion, a temperature detector for detecting the internal temperature of the device, and a control means for changing the angle of expansion of the transmission light beam as a function of the temperature detected by the temperature detector. Typically the optical space transmission device further comprises a light receiving means for converting the light beam carrying reception signal transmitted from a partner device and taken into the own device into an electric signal and an angle correcting means for correcting the angular displacement between the light beam to be transmitted and the received light beam.