Wavefront aberrations measurement of freeform surface based on computer-generated hologram technology

Xiaohong Wei; Kaiyuan Xu; Yuhang He

doi:10.1117/12.3014942

22 December 2023 Wavefront aberrations measurement of freeform surface based on computer-generated hologram technology

Xiaohong Wei, Kaiyuan Xu, Yuhang He

Proceedings Volume 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023); 129740D (2023) https://doi.org/10.1117/12.3014942
Event: Fifth International Symposium on High Power Laser Science and Engineering, 2023, Suzhou, China

Abstract

With the development of machine vision, remote sensing, and wearable displays, the applications of optical imaging systems are becoming more and more complex, and the requirements of intelligence, miniaturization and low cost is becoming higher. By breaking the constraint of rotational symmetry or simple aspherical application, and get more degree of surface shape freedom, freeform surfaces have brought new solutions to the optical imaging system. Meanwhile, traditional optical surface testing method is difficult to meet high-efficiency and high-precision at the same time since the non-rational symmetric characteristics. With the aid of modern photolithography, complicated computer generated hologram (CGH) can be produced for the null testing of optical freeform surfaces. Furthermore, CGH can provide references for system alignment while testing. In this paper, a CGH method of measuring freeform surface is presented, and the measurement uncertainty is analyzed. The result shows that for measuring the wavefront of a freeform surface with over 6-inch clear aperture, the measurement accuracy is less than λ/10.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiaohong Wei, Kaiyuan Xu, and Yuhang He "Wavefront aberrations measurement of freeform surface based on computer-generated hologram technology", Proc. SPIE 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023), 129740D (22 December 2023); https://doi.org/10.1117/12.3014942

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