A free space optics communication apparatus is provided which allows
flexible setting in accordance with the number or distances of other
apparatuses in single-to-multipoint communication.The free space optics
communication apparatus has a movable mirror array which has a plurality
of mirrors capable of reflecting a light signal from a light source and
arranged in a matrix-like form, and a mirror control circuit for
controlling the directions of the respective mirrors to form a plurality
of mirror groups which reflect the light signal toward the other
apparatuses in the movable mirror array. The number of the mirror groups
formed in the movable mirror array through the control of the directions
of the mirrors by the mirror control circuit is changeable.