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Elliptic averaging of optical transfer functions for estimating astigmatism and defocus
Optics Communications ( IF 1.961 ) Pub Date : 2020-01-02 , DOI: 10.1016/j.optcom.2019.125213
Stanislav Budzinskiy

We elaborate an elliptic averaging procedure to estimate astigmatism and defocus of optical transfer functions that allows to reduce the problem to a simpler one of estimating defocus only. Based on approximate closed-form formulas for the zeros of defocus optical transfer functions, we reparametrise the frequency domain and derive a class of nonlinear transformations that turn elliptic null-curves of astigmatic optical transfer functions into circles. Our results make astigmatic images amenable to restoration.
更新日期:2020-01-02

 

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