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15 November 2022 Influence on correlated Hartmann detection accuracy by microlens focal length
Liliang Yang, Yi Tan, Lei Min, Yue Zhou
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Proceedings Volume 12448, 5th Optics Young Scientist Summit (OYSS 2022); 124481F (2022) https://doi.org/10.1117/12.2638459
Event: 5th Optics Young Scientist Summit (OYSS 2022), 2022, Fuzhou, China
Abstract
When adaptive optics is applied to target identification, laser high beam quality transmission and other fields, extended object wavefront detection is a technical challenge. And the detection accuracy directly affects the adaptive optics correction effect. To investigate the problem that the focal length of microlens affects the accuracy of extended target wavefront detection. In this paper, a simulation model of extended target wavefront detection based on correlated Hartmann's variable focus was established. 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 reconstruction. We analyzed the effect of microlens focal length variation on the wavefront detection accuracy. The relationship curves between the wavefront reconstruction residuals RMS, PV and microlens focal length were obtained. And we further analyzed the intrinsic physical reasons for this relationship.The results show that the variation of the microlens focal length affected the point spread function used in the algorithm.The smaller the focal length, the more accurate the corresponding point spread function calculation results. Therefore, the smaller the calculation error of the subaperture offset, the higher the wavefront detection accuracy.
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Liliang Yang, Yi Tan, Lei Min, and Yue Zhou "Influence on correlated Hartmann detection accuracy by microlens focal length", Proc. SPIE 12448, 5th Optics Young Scientist Summit (OYSS 2022), 124481F (15 November 2022); https://doi.org/10.1117/12.2638459
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KEYWORDS
Wavefronts
Microlens
Point spread functions
Target detection
Imaging systems
Photovoltaics
Detection and tracking algorithms
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