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The Classical Ronchi test for piston detection

机译:用于活塞检测的经典Ronchi测试

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We propose a method for piston errors detection in a segmented surface by means of the classical ronchi test. This consists in comparing the ronchigram fringes frequency of a reference and piston segment. The comparison is developed for the correlation method of the intensity vs pixels curves of the reference and piston segment. The presence of the piston term in a ronchigram is assured experimentally for the shack interferometer, it is by observing the coincidence rings centered type fizeau in each segment. The proposed method is applied to a segmented spherical surface with a two segment mirrors, and resolutions of piston ≥ 63 ηm are experimentally obtained.
机译:我们提出了一种通过经典ronchi测试在分割表面中检测活塞错误的方法。这包括比较参考段和活塞段的ronchigram条纹频率。针对参考和活塞段的强度与像素曲线的相关性方法进行了比较。棚形干涉仪通过实验确保了活塞项在活塞形图中的存在,这是通过观察每个段中的重合环居中型菲索而实现的。将该方法应用于具有两个分段镜的分段球面,并通过实验获得了≥63ηm的活塞分辨率。

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