Light beam diverging angle adjustable wireless light communication transmitting antenna

The invention relates to a wireless optical communication sending antenna with an adjustable beam divergence angle, comprising an optical lens, a fiber terminal pad and an incident fiber; wherein one end of the incident fiber is fixed on the fiber terminal pad and the other end is connected with a data transmission device; the optical lens is fixed on one end of an outside thread sleeve and after a spring is sleeved on the outside surface of the outside thread sleeve, the sleeve is screwed in from one end of an inside thread sleeve; the fiber terminal pad is fixed on the other end of the inside thread sleeve; the principal axis of the optical lens and the center of the end face of the incident fiber are in the same straight line. The adjustability of the beam divergence angle is realized by changing the axial distance between the incident fiber and the optical lens. The sending antenna has simple structure and low manufacturing cost; the adjustable process of the emitted beam divergence angle is simple and easy; besides, the sending antenna effectively solves the problems of aim and different requirements on divergence angles in the communication process of different wireless optical communication systems, thereby realizing the integration of the aim and the communication, being convenient for mass production and being applicable to routine point-to-point static wireless optical communication and light emitting systems of mobile wireless optical communication on special occasions.