Patent ID: 9182289
Filing Date: 2015-11-10
Classification: G01J

Abstract:
1. A method for estimating a wavefront whose deviation is represented with Zernike polynomials or another set of functions by using maximum likelihood estimation, the method comprising: preparing data obtained by using a wavefront sensor including a lenslet array and a detector; selecting an area of values of Zernike polynomial coefficients or values of coefficients of the another set of functions for executing an investigation of symmetry of a cost function surface of the Zernike polynomial coefficients or the coefficients of the another set of functions; executing the investigation of the symmetry of the cost function surface in the area selected in the selecting step; selecting a combination of the Zernike polynomial coefficients or coefficients of the another set of functions to be optimized simultaneously based on the symmetry of the cost function surface obtained in the executing step; executing a maximum likelihood optimization for the Zernike polynomial coefficients or coefficients of the another set of functions according to the combination by searching for a minimum of the cost function.