Effect of aperture subdivision on wavefront sensing

Marcos A. van Dam; Richard G. Lane

doi:10.1117/12.409305

17 November 2000 Effect of aperture subdivision on wavefront sensing

Marcos A. van Dam, Richard G. Lane

Proceedings Volume 4125, Propagation and Imaging through the Atmosphere IV; (2000) https://doi.org/10.1117/12.409305
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Phase retrieval is a non-linear technique to recover the phase in the Fourier domain using intensity measurements at the image plane and additional constraints. We describe a method to solve the phase retrieval problem using linear iterations near the solution, a technique that gives both physical insight into phase retrieval and numerical results. When phase retrieval is done on data from subdivided apertures, there is a loss of information about the relative piston terms of the subapertures and this error has been quantified. We find that there is a smaller wavefront error when estimating the phase form a full aperture than from a subdivided aperture. However, using a combination of intensity measurements from a full and a subdivided aperture gives a much better performance. The error in estimating the wavefront also increases with increasing turbulence levels.

Citation Download Citation

Marcos A. van Dam and Richard G. Lane "Effect of aperture subdivision on wavefront sensing", Proc. SPIE 4125, Propagation and Imaging through the Atmosphere IV, (17 November 2000); https://doi.org/10.1117/12.409305

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