Image enhancement of Shack-Hartmann wavefront sensor with non-uniform illumination

Peijia Jiang; Mengmeng Zhao; Wang Zhao; Shuai Wang; Ping Yang

doi:10.1117/12.2604676

13 December 2021 Image enhancement of Shack-Hartmann wavefront sensor with non-uniform illumination

Peijia Jiang, Mengmeng Zhao, Wang Zhao, Shuai Wang, Ping Yang

Proceedings Volume 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies; 120710P (2021) https://doi.org/10.1117/12.2604676
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

The uniformity of illumination can affect the detection ability of the Shack-Hartmann wavefront sensor to a certain extent and degrade the wavefront restoration accuracy. When the intensity distribution of the incident beam is very non-uniform, it is difficult for each sub-spot image to carry out optimal signal-to-noise ratio (SNR) at the same time. The spot image may be over-exposed or too dark, and that brings about the incorrect measurements of the centroid and further influences the reconstruction accuracy of the wavefront. In the paper, we use multi-frame image information fusion to generate an enhanced spot-array image with a high dynamic range, so as to improve the accuracy of the overall centroid calculation. The simulation results show that this method is effective in the above cases.

Citation Download Citation

Peijia Jiang, Mengmeng Zhao, Wang Zhao, Shuai Wang, and Ping Yang "Image enhancement of Shack-Hartmann wavefront sensor with non-uniform illumination", Proc. SPIE 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies, 120710P (13 December 2021); https://doi.org/10.1117/12.2604676

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KEYWORDS

Image fusion

Image processing

Image enhancement

High dynamic range imaging

Imaging arrays

Wavefront sensors

Image quality

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