Automatic focusing laser ranging device and method and application in laser operation

The invention discloses an automatic focusing laser ranging device and method and application in a laser operation. The device comprises a reflecting device, a focusing device, a ranging laser device, a transmission device and a shell. In the device, distance measuring laser has the functions of focus indication and distance measurement, and the distance measuring laser irradiates the surface of a bone or soft tissue and then is reflected to a nearby receiver for real-time distance measurement; a motor and a lead screw are introduced and are coupled through a gear, the motor rotates forwards or reversely according to positive and negative electric signal feedback given by distance measuring laser, the lead screw is driven to rotate to adjust the position of a lens, and finally correct focusing of working laser is achieved. 本发明公开一种自动对焦的激光测距装置、方法和在激光手术中的应用。该装置包括：反射装置、聚焦装置、测距激光装置、传动装置和壳体。该装置中，测距激光兼具焦点指示与测距的功能，测距激光照射到骨骼或软组织表面后返射至旁边的接收器进行实时测距；通过引入电机与丝杠，两者通过齿轮耦合，电机根据测距激光给出的正、负电信号反馈，进行正向或反向旋转，带动丝杠旋转调整透镜位置，最终获得工作激光的正