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在研究了大功率半导体激光器(HPLD)光束特性的基础上,提出了实现大功率半导体激光束变发散角的设计方法。针对线源像散激光光源设计了由两个垂直放置的平凸柱透镜组成的可变激光束发散角的整形系统。在满足光束发散角要求的前提下,通过离焦使其出射光束的发散角在一定范围内连续改变。建立了两个柱透镜移动量与光束发散角关系的数学模型。利用商用光学软件对整形系统进行了模拟,结果表明,光束发散角被压缩在一定范围内连续改变,从而可实现对不同范围物体照明。
Based on the study of the characteristics of high power semiconductor laser (HPLD), the design method of high divergence angle of high power semiconductor laser beam is proposed. Aiming at the source astigmatism laser source, a shaping system of variable laser beam divergence angle consisting of two vertically arranged plano-convex cylindrical lenses is designed. Under the premise of meeting the requirements of beam divergence angle, the divergence angle of the outgoing beam changes continuously within a certain range by defocusing. The mathematical model of the relationship between the displacement of two cylindrical lenses and the divergence angle of the beam is established. The plastic system was simulated with commercial optical software. The results show that the beam divergence angle is compressed and changed continuously in a certain range, which can illuminate objects in different ranges.