title: Modal wavefront reconstruction based on Zernike polynomials for lateral shearing interferometry: comparisons of existing algorithms.
abstract: Four modal methods of reconstructing a wavefront from its difference fronts based on Zernike polynomials in lateral shearing interferometry are currently available, namely the Rimmer-Wyant method, elliptical orthogonal transformation, numerical orthogonal transformation, and difference Zernike polynomial fitting. The present study compared these four methods by theoretical analysis and numerical experiments. The results show that the difference Zernike polynomial fitting method is superior to the three other methods due to its high accuracy, easy implementation, easy extension to any high order, and applicability to the reconstruction of a wavefront on an aperture of arbitrary shape. Thus, this method is recommended for use in lateral shearing interferometry for wavefront reconstruction.
authors.affiliation: Laboratory of Information Optics and Opto-Electronic Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Fengzhao
authors.initials: F
authors.lastname: Dai
authors.forename: Feng
authors.initials: F
authors.lastname: Tang
authors.forename: Xiangzhao
authors.initials: X
authors.lastname: Wang
authors.forename: Osami
authors.initials: O
authors.lastname: Sasaki
authors.forename: Peng
authors.initials: P
authors.lastname: Feng