Analysis of the impact of wavefront detection accuracy for variable extension targets based on Hartmann wavefront sensing

Liliang Yang; Yi Tan; Lei Min; Chao Yang; Ping Yang; Shuai Wang; Wang Zhao; Yue Zhou

doi:10.1117/12.2634483

12 May 2022 Analysis of the impact of wavefront detection accuracy for variable extension targets based on Hartmann wavefront sensing

Liliang Yang, Yi Tan, Lei Min, Chao Yang, Ping Yang, Shuai Wang, Wang Zhao, Yue Zhou

Author Affiliations +

Proceedings Volume 12173, International Conference on Optics and Machine Vision (ICOMV 2022); 121730B (2022) https://doi.org/10.1117/12.2634483
Event: International Conference on Optics and Machine Vision (ICOMV 2022), 2022, Guangzhou, China

Abstract

When adaptive optics is applied to target imaging, laser atmospheric transmission, etc., variable extension target wavefront detection is a technical challenge. And its detection accuracy directly affects the correction effect of adaptive optics.In order to explore the wavefront detection accuracy problem of variable extension targets. In this paper, a simulation model for wavefront detection of variable extension targets with correlated Hartmann was developed. The model was based on the commonly used optical system parameters, and it was also established by using the theories of Fresnel diffraction, Newton's imaging equation, the working principle of Shack-Hartmann wavefront detector, and wavefront recovery.We analyzed the effects of target distance and attitude variations on wavefront detection accuracy. The relationship curves between RMS and PV of wavefront recovered residuals and target distance and different attitudes were obtained in the simulation. And we further carried out the analysis for the intrinsic physical reasons of forming this relationship. The results show that target distance and attitude changes affected the extension of targets within the Hartmann subaperture. When the wavefront was recovered using the correlation algorithm, we obtained that the smaller the extension, the higher the wavefront detection accuracy within the relevant Hartmann detection accuracy. Therefore, it could be summarized that the smaller the extension of the target, the more similar it was to the point target, then the detection error introduced by the extension became smaller.

Citation Download Citation

Liliang Yang, Yi Tan, Lei Min, Chao Yang, Ping Yang, Shuai Wang, Wang Zhao, and Yue Zhou "Analysis of the impact of wavefront detection accuracy for variable extension targets based on Hartmann wavefront sensing", Proc. SPIE 12173, International Conference on Optics and Machine Vision (ICOMV 2022), 121730B (12 May 2022); https://doi.org/10.1117/12.2634483

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KEYWORDS

Wavefronts

Target detection

Wavefront sensors

Detection and tracking algorithms

Adaptive optics

Microlens

Point spread functions

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