半导体激光测距机非球面准直整形元件的设计

Aspheric Collimating and Shaping Element Design for Diode Laser Range Finders

准直整形光学系统的设计可以提高半导体激光测距的测程和精度,系统中采用非球面光学元件优点突出。某测距装置采用4×1半导体激光器阵列,其波长为905 nm,发散角为25°(V)×10°(H)。根据半导体激光器的远场发散角特点,结合非球面光学设计理论,基于ZEMAX软件设计出非球面准直整形元件。由计算结果可知,准直整形后垂直于结方向和平行于结方向发散角分别为3.33 m rad和2.67 m rad,光斑更均匀,能量利用率提高。

Collimation and shaping optical system design can improve the measurement range and precision of semiconductor laser ranging. Using aspheric optical element has prominent advantages. Some ranging device using 4× 1 semiconductor laser array, whose wavelength is 905 nm, divergence angle is 25°（V）×10°（H）. According to semiconductor laserh far field divergence eharacteristics, aspheric collimation and shaping part has been designed based on aspherie optical design theory using ZEMAX. The calculation results show that the vertical and parallel direction of junction divergence is 3.33 mrad and 2.67 mrad respectively, and the spot is more uniform, which can improve energy utilization.