Abstract
In this Letter, we introduce a wavefront slope sensor based on a diffractive element. The diffractive element wavefront sensor (DEWS) produces four double overlapping copies of the incoming wavefront acting like a combination of shearing and pyramidal sensors. The DEWS allows a simple and fast slope estimate. The wavefront sampling can be as high as the number of pixel assigned to cover a wavefront copy, and it can be modified with only binning the CCD pixels. The theory for designing the sensor, its application to extract local slope information, and a simple noise analysis are presented. An application example for atmosphere aberrated wavefronts is demonstrated.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Jason H. Karp, Trevor K. Chan, and Joseph E. Ford
Appl. Opt. 47(35) 6666-6674 (2008)
Y. Ruan, P. Bon, E. Mudry, G. Maire, P. C. Chaumet, H. Giovannini, K. Belkebir, A. Talneau, B. Wattellier, S. Monneret, and A. Sentenac
Opt. Lett. 37(10) 1631-1633 (2012)
B. R. Boruah
Opt. Lett. 35(2) 202-204 (2010)