激光与光电子学进展, 2018, 55 (11): 110401, 网络出版: 2019-08-14   

基于位置传感器的空间激光准直系统标定技术 下载: 945次

Spatial Laser Collimation System Calibration Based on Position Sensitive Device
作者单位
天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室, 天津 300072
摘要
空间激光准直系统常采用位置传感器(PSD)作为光电接收单元,半导体激光器作为光源。由于PSD具有非线性,激光光源出射激光的衍射特性会导致准直系统在空间不同距离处响应情况不同。为了减少空间激光准直系统工作时在不同空间距离处的重复标定工作,提出了一种模拟PSD探测半导体激光光斑位置的方法。该方法通过设计相关光学系统获取PSD靶面非线性数据及激光光强分布数据,完成了PSD对光斑强度重心响应的模拟。之后对仿真结果进行了实验验证,实验结果表明该仿真系统能够较好地重现实际PSD探测过程,在0~4.5 mm的相对位移范围内最大误差仅为0.026 mm。
Abstract
Spatial laser collimation system often uses the position sensitive device (PSD) as a photoelectric receiver unit, and a semiconductor laser as a light source. Because of the nonlinearity of PSD, the diffraction characteristics of laser light will result in different responses of collimation system at different spatial distances. To reduce the repeated calibration at different spatial distances during the operation of the spatial laser collimation system, we propose a simulation method of detecting the semiconductor laser spot position by PSD. In this method, the non-linear data of PSD target surface and the laser intensity distribution data are obtained with the design of the relevant optical systems, and the response of the PSD to the spot intensity center of gravity is simulated. Then, the simulation results are verified by experiment. The experimental results show that the simulation system designed in this paper can reproduce the actual PSD detection process, and the maximum error is only 0.026 mm in the relative displacement range of 0-4.5 mm.

黄战华, 方石, 张亚男, 蔡怀宇, 张尹馨. 基于位置传感器的空间激光准直系统标定技术[J]. 激光与光电子学进展, 2018, 55(11): 110401. Zhanhua Huang, Shi Fang, Yanan Zhang, Huaiyu Cai, Yinxin Zhang. Spatial Laser Collimation System Calibration Based on Position Sensitive Device[J]. Laser & Optoelectronics Progress, 2018, 55(11): 110401.

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