摘要
对于滚转角测量精度低并且难于测量的问题,提出了一种基于准直光束光斑位置变化的高精度滚转角测量方法。当被测物转动时,CCD上2光斑位置随之改变,2个光斑中心连线斜率亦改变。斜率变化由被测物俯仰、偏摆、滚转运动引起。在测量系统中基于自准直原理测量偏摆角和俯仰角,运用相关的算法,消除由偏摆和俯仰运动引起的滚转角误差,从而实现滚转角的精确测量。同时运用Zemax建立系统仿真模型,进行了滚转角的仿真实验测量。将仿真实验结果输入到滚转角解算模型中解算,结果表明:在0~1 800″范围内滚转角的解算值与Zemax的设定值完全一致,由此验证了测量方法的可行性及正确性。
For the problems of low accuracy and difficult measurement in roll angle measurement,a roll angle measuring method based on spot position changes of collimated beams was presented.The positions of the two light spots on the CCD change with the movement of measured object,so does the slope of the line determined by the two light spots.The change of the slope is caused by yawing, pitching and rolling movements.In the measuring system,the pitch angle and yaw angle were measured based on the principle of self-collimation.After the affection of the pitch and yaw were eliminated,the roll angle was accurately measured.A mathematical model of the system was built,and Zemax software was used to establish a system model to simulate roll angle.Simulation results were calculated by the solving model of roll angle.Within the range of 0~1 800″the results of the mathematical model were exactly consistent with the value of Zemax,so that the feasibility and correctness of measuring method were validated.
出处
《应用光学》
CAS
CSCD
北大核心
2014年第2期281-285,共5页
Journal of Applied Optics
基金
北京市教委科研计划项目(KM201211232006)
关键词
光学测量
滚转角
准直光束
仿真
optical measuring
roll angle
collimated beam
simulation
