Nonlinear spline wavefront reconstruction through moment-based Shack-Hartmann sensor measurements

M. Viegers Sainz, E. Brunner, O. Soloviev, C. C. De Visser, M. Verhaegen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

We propose a spline-based aberration reconstruction method through moment measurements (SABRE-M). The method uses first and second moment information from the focal spots of the SH sensor to reconstruct the wavefront with bivariate simplex B-spline basis functions. The proposed method, since it provides higher order local wavefront estimates with quadratic and cubic basis functions can provide the same accuracy for SH arrays with a reduced number of subapertures and, correspondingly, larger lenses which can be beneficial for application in low light conditions. In numerical experiments the performance of SABRE-M is compared to that of the first moment method SABRE for aberrations of different spatial orders and for different sizes of the SH array. The results show that SABRE-M is superior to SABRE, in particular for the higher order aberrations and that SABRE-M can give equal performance as SABRE on a SH grid of halved sampling.

Original languageEnglish
Pages (from-to)11514-11529
JournalOptics Express
Volume25
Issue number10
DOIs
Publication statusPublished - 2017

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