Abstract

This talk proposes a simple and powerful algorithm to extend the dynamic range of Shack-Hartmann (SH) wavefront sensor. In a conventional SH wavefront sensor, the dynamic range is limited by the f-number of lenslet which is also related to the slope of wavefront. A spot is required to stay inside a sub-aperture defined by original lenslet that creates the spot. If a wavefront varies so fast that a spot displacement goes beyond a sub-aperture, a spot can not be assigned to original lenslet. In this case, conventional SH sensor fails to reconstruct the wavefront.

© 2003 Optical Society of America