Wavefront Reconstruction by a Defocused Shack-Hartmann Sensor Based on Moment of Spot

Fang, Feng; Changwei, 李常伟 Li; Sijiong, 张思炯 Zhang

doi:10.3788/aos201838.0628001

Cited by 2 publications

(1 citation statement)

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“…To improve the detection performance of the subaperture detail in low spatial resolution, a series of improvement methods have been proposed in recent years. Some researchers proposed a kind of defocus SHWFS wavefront sensing method to improve reconstruction precision [16,17]. However, defocused structures would reduce the dynamic range.…”

Section: Introductionmentioning

confidence: 99%

Shack–Hartmann Wavefront Sensing Based on Four-Quadrant Binary Phase Modulation

Zhao

Yang

et al. 2022

Photonics

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Aiming at the problem that it is difficult for the conventional Shack–Hartmann wavefront sensor to achieve high-precision wavefront reconstruction with low spatial sampling, a kind of Shack–Hartmann wavefront sensing technology based on four-quadrant binary phase modulation is proposed in this paper. By introducing four-quadrant binary phase modulation into each subaperture, the technology is able to use an optimization algorithm to reconstruct wavefronts with high precision. The feasibility and effectiveness of this method are verified at extreme low spatial frequency by a series of numerical simulations, which show that the proposed method can reliably reconstruct wavefronts with high accuracy with rather low spatial sampling. In addition, the experiment demonstrates that with a 2 × 2 microlens array, the four-quadrant binary phase-modulated Shack–Hartmann wavefront sensor is able to achieve approximately 54% reduction in wavefront reconstitution error over the conventional Shack–Hartmann wavefront sensor.

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Section: Introductionmentioning

confidence: 99%