Automatic focusing mechanism based on electromagnetic induction

The invention discloses an automatic focusing mechanism based on electromagnetic induction, relates to the technical field of laser emission, and aims to solve the problem of laser spot size adjustment in a laser simulation countermeasure system.The automatic focusing mechanism comprises a light source, a main body and a focusing mechanism, the light source is mounted on one side of the main body, and the focusing mechanism is mounted on the other side of the main body; the focusing mechanism is mounted in the main body, the light source comprises a laser tube and a laser tube sleeve, the laser tube is mounted in the laser tube sleeve, and the laser tube sleeve is in threaded connection with one side of the main body. According to the scheme, the focal length is adjusted in an electromagnetic induction mode, the effect that the same light source in the laser simulation countermeasure system emits a plurality of light spots with different sizes can be achieved, and compared with mechanical adjustment and other