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在瑞奇-康芒定量检测中,被检数据中除了被检平面本身所固有的像散以外,还存在由于大曲率所造成的像散,这样就很难得到准确的被测平面面形误差,给指导镜面加工带来困难。对瑞奇-康芒检测法中由于瑞奇角产生的压缩图像进行展开,同时旋转被测平面进行推导,该方法将被检平面高低误差和被检平面本身的像散进行分离,使得检测结果更加准确地反映被检平面面形。通过与其它检测方法的比对,可以证明此方法的可行性、可靠性。给出了大天区面积多目标光纤光谱望远镜(LAMOST)项目中的MA大口径平面子镜的检测实例。
In the Ricky-Kangmoon quantitative test, in addition to the astigmatism inherent in the plane to be inspected, the astigmatism caused by the large curvature exists in the data to be inspected, so that it is difficult to obtain an accurate measurement of the planar surface shape error , To guide the mirror processing difficulties. In the Ricky-Conmont detection method, the compressed image generated by Ricky Horn is unfolded and the plane under test is rotated to derive. The method separates the level error of the plane to be inspected and the astigmatism of the plane to be inspected, so that the detection result More accurately reflect the seized flat surface shape. Through the comparison with other detection methods, we can prove the feasibility and reliability of this method. The detection example of MA large aperture plane sub-mirror in LAMOST project is given.