Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart, 70569, Germany.
Opt Lett. 2011 Jun 1;36(11):2005-7. doi: 10.1364/OL.36.002005.
We present a method for absolute testing of axicon surfaces in a null test setup. The absolute test exploits the symmetry of axicons, which allows us to introduce a shift of the surface under test in both the axial and rotational directions while still maintaining the null test condition. With two shifts of the surface under test and four measurements, the interferometer and null optics error can be removed. The absolute surface local deviation can be obtained by wavefront reconstruction with a double-side spiral-path direct integration method. A simulation of the method, including typical systematic as well as statistical errors as input, is presented to estimate the error propagation. Experimental absolute test results of a 90° axicon surface are given.
我们提出了一种在无镜测试装置中对轴棱锥表面进行绝对测试的方法。绝对测试利用了轴棱锥的对称性，这使得我们能够在保持无镜测试条件的同时，在轴向和旋转方向上引入测试表面的位移。通过两次测试表面的位移和四次测量，可以消除干涉仪和无镜光学元件的误差。通过使用双面螺旋路径直接积分方法进行波前重建，可以获得绝对表面局部偏差。本文介绍了一种包括典型系统误差和统计误差在内的方法模拟，以估计误差传播。给出了一个 90°轴棱锥表面的实验绝对测试结果。
