OPTICAL SYSTEM STRUCTURE OF LASER RANGE FINDER

摘要

An optical system structure of a laser range finder, comprising a laser emission light source (1), a collimating objective lens (2) disposed in front of the laser emission light source (1), an optical receiver (5) and a receiving objective lens converging the reflected light to the optical receiver (5); the receiving objective lens is a free-form surface optical element (14) consisting of an aspheric part and a toroidal part; an infinitely far reflected light passes through the aspheric part of the receiving objective lens and focuses on the optical receiver (5); and a short distance reflected light passes through the toroidal part of the receiving objective lens and covers the surface of the optical receiver (5). The optical system structure satisfies short distance and long distance high precision measurements, has a simple structure, good measurement stability and is more cost-effective than conventional measurement devices, and facilitates miniaturization.