Abstract

This paper presents a misalignment aberrations calibration method for the interferometric testing of cylindrical surface. This approach is based on a simple polynomials function, which is deduced by analyzing the geometry of the misalignment aberrations and perfectly describes the relationship between the misalignment aberrations and the corresponding adjustment errors. A least-squares algorithm for calibration of the misalignment aberrations was implemented towards the measured phase data, and the adjustment errors can be estimated through the proposed mathematical model. Then by subtracting the fitting function from the measured phase data, the misalignment aberrations and the genuine deviation of the test cylindrical surface can be completely separated. By means of simulation and experimental results, the repeatability and accuracy of the technique are discussed.

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