比较了目前常用的几种多光轴平行性测试方法.在大口径平行光管法的基础上,结合CCD技术提出了新的光轴平行性校准方法.该方法采用ZYGO干涉仪精确定焦,通过比较目标靶在CCD上共轭像的中心坐标和被测系统激光光斑中心坐标之间的差异,即可计算出红外或者可见光轴与激光轴的平行性误差.分析了该方法中大口径离轴抛物面镜焦面的确定与激光光斑中心定位等问题.讨论了该方法的测量不确定度,得到测量不确定度小于5″.%Several bore-sight methods for multi-spectral optical axes used nowadays were compared. Based on a large aperture collimator, a new bore-sight method for optical axes parallelism was put forward by using CCD technology. In this method, the ZYGO interferometer was used for accurately focusing. By comparing the center coordinates of the conjugated image on CCD of the target with the center coordinates of the laser spot of the system under test, the parallelism between the visible axis or infrared axis and the laser axis was calculated. The focal plane of large aperture off-axis paraboloid was determined and analyzed, and the center position of the laser spot was determined as well. The measurement uncertainty was analyzed and the uncertainty of 5" was obtained.
展开▼
