FOCAL LENGTH CONTROLLER FOR WIRELESS OPTICAL COMMUNICATION SYSTEM

摘要

PURPOSE: A focal length controller for wireless optical communication system is provided to accurately adjust the focus distance by simply moving the position of a transmitting unit in the outside. CONSTITUTION: A concave portion is formed at one side of a body to pass with the outside. A penetrating hole is formed in a body surface of the concave portion to be penetrated with the internal portion of the body. A moving member(13) is installed in the body surface of the concave portion capable of being moved forward and backward, and a part of the moving member(13) is fixed to a transmitting portion(2) through the penetrating hole for providing a movement force to the transmitting portion(2) of the body. When the transmitting unit(2) is moved forward and backward together with the moving member(13), a plurality of display lines visually display an adjustment distance of a focus according to the moving quantity.