红外与激光工程
2022, 51(7): 20210715
针对瞄准镜在射击前后会有一定的变动量即零位走动量。文中介绍了一种测量零位走动量的方法, 该方法采用CCD测量总的零位变化量, 再通过光电自准直仪测量出重复装卡时产生的误差, 两者的差值即为纯粹的零位走动量。针对之前无法剔除重复装卡引起误差的方法, 该测量方法的优势在于可以测量纯粹的零位走动量, 通过对工作原理的介绍以及实验分析, 结果表明, 白光瞄具的纯粹零位走动量[σ]值不大于6.48″(0.03 mil); 该方法所测得的零位走动量精度高, 符合技术指标要求。
零位走动量 半反半透镜组件 光电自准直仪 重复装卡误差 variational momentum of the zero position reflection and transmission type lens component optoelectronic autocollimator repeat installation error
Author Affiliations
Abstract
1 Shanghai Key Laboratory of All Solid-state Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
A robust charge-coupled device (CCD) photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio (SNR) and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is applied to the automatic feedback control of the actively regulated illuminating light source of the measuring system to maximize SNR while avoiding image saturation. A Fourier phase shift method for subpixel estimation is adopted to achieve high-accuracy measurement in the presence of noises. Experimental results indicate that the technologies proposed here largely improve the measuring stability, dynamic range, and accuracy of the CCD photoelectric autocollimator used outdoors.
CCD光电自准直仪 户外使用 亚像素 傅里叶相移 PWM 120.0120 Instrumentation, measurement, and metrology 120.1680 Collimation 100.0100 Image processing 100.2650 Fringe analysis Chinese Optics Letters
2011, 9(9): 091201
天津大学精密测试技术及仪器国家重点实验室,天津,300072
设计一种电磁驱动的微机械结构,实现自准直仪双坐标光电信号的自动跟踪,采用跟踪与读数分离的方法,提高仪器的测量精度.经实际测试和使用表明,设计方案合理,稳定可靠,双坐标工作范围为-100″~ +100″,仪器具有绝对零点,分辨力0.1″, 瞄准定位精度0.1″,非线性误差小于0.5″.
微机械 自跟踪 光电自准直仪