Phase Retrieval Methods For Adaptive Optics Correction With Diffractive Samples
INDUSTRIAL OPTICAL DEVICES AND SYSTEMS (ODS 2020)(2020)
摘要
Extension of adaptive optics (AO) techniques to future data storage applications requires consideration for light reflected off a diffractive surface. Simulations and experiments are presented to study the efficacy of various wavefront reconstruction methods for examining diffractive samples. Image processing techniques are applied as an alternative to a Shack-Hartmann wavefront sensor. A modified Gerchberg reconstruction algorithm is used to gather wavefront data from multiple image acquisitions at different defocus positions. Furthermore, these multiple images are gathered simultaneously with a single acquisition using the concept of phase retrieval with complex diversity. A computer-generated hologram (CGH) is designed, fabricated, and implemented experimentally for single-shot AO correction.
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关键词
Adaptive optics,phase retrieval,diffractive surfaces,wavefront reconstruction,optical data storage,single-shot
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