Improving sub-pixel shifts estimation in a Shack – Hartmann wavefront sensor

In the paper, we propose a simple algorithm that improves the quality with which the displacements between images registered in the sub-apertures of a a Shack – Hartmann (SH) wavefront sensor can be determined. Instead of measuring shifts between a given sub-aperture and a reference image, the ...

Source: Optics Letters - May 15, 2019 Category: Physics Authors: Popowicz Adam Source Type: research