飞机风挡玻璃光学角偏差测量的研究

介绍一种新的测量飞机风挡玻璃光学角偏差的方法和全自动测量装置。与现行的角偏差自动测量方法相比，这种方法的物理意义清晰、样件被测量位置明确、测量结果准确度高。标靶采用针孔而不是十字叉丝或“L”形。采用钨灯和投射透镜产生准直白光，用CCD探测器作为光斑位置传感器在成像透镜的后焦面测量光斑位置的变化，从而可得光学角偏差。测量系统通过标准样品可溯源到国家角度基准。分析表明：测量系统的测量不确定度达到7.3″(k=2)。

Measurement of optical angular deviation for airplane windscreens

A novel measurement method and a full-automatic measurement facility for optical angular deviation of airplane windscreens are presented. Compared with the existing automatic measurement method,this method has clear physical meaning,well defined measurement position and it could achieve more accurate result. The target is a pin-hole instead of a cross or a“L”.A tungsten halogen lamp and a projecting lens are used to generate the collimated light. A CCD detector is used as light spot position sensor to measure the changes of the spot position at the rear focal plane of the imaging lens,and the optical angular deviation can be derived. The measurement facility is traceable to the national angle primary standard with standard optical angular deviation samples. The analysis shows that the measurement uncertainty of the system reaches 7.3″(k=2).