摘要
对激光束四象限跟踪系统各通道输出电压随温度的变化进行了实际测量,建立了一种校正光斑中心坐标的模型,用于补偿温度变化导致的偏移量;采取控制电路系统工作温度的措施,减小光斑定位的不确定性;根据探测系统光电信号处理方式,用各象限接收的脉冲光强幅度值表述探测光束为调制脉冲串时光束中心坐标。通过测试四象限跟踪系统的输出特性,确定该系统的线性工作范围,以便保证光斑位于四象限探测器的最佳测量区域;控制电路系统环境温度后,系统跟踪分辨率达到1μm,取决于单片机控制的步进电机步进准确度。
The output voltage of each channel of the four-quadrant tracking system under changing temperature was measured, and a model used to correct the spot center coordinates was established, which was used to compensate the deviation caused by temperature changes. The uncertainty of spot location was reduced via controlling temperature of circuit system operation. According to the photoelectric detection system signal processing way, center coordinate of light beam may be calculated with intensity magnitude of received light pulse of each quadrant. Output characteristics of the four-quadrant tracking system were also tested, the linear operation range of the system was determined which ensured the spot on the best measurement area of the four-quadrant detector. Under circuit system environment temperature controlled, the tracking resolution is 1 μm, which is dependent on the step accuracy of stepper motor which is controlled by microcomputer.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第3期605-610,共6页
Infrared and Laser Engineering
基金
江苏省科技支撑计划(BE2010733)
气象行业专项(GYHY201106047)
关键词
光电探测
四象限探测器
跟踪
不确定性
photoelectric detection
four-quadrant detector
tracking
uncertainty
