Dr. Hao Luo Profile

Dr. Hao Luo

at Shanghai Astronomical Observatory, Chinese Academy

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Proceedings Article | 7 October 2020 Paper

Research on theoretical method of computational imaging astrometry

Hao Luo, Zhaoxiang Qi, Yong Yu, Shilong Liao

Proceedings Volume 11571, 115710Y (2020) https://doi.org/10.1117/12.2580472

KEYWORDS: Computational imaging, Astronomy, Overlay metrology

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Ground based optical observation is widely used in the field of astrometry of moving objects such as Near-Earth Objects and space debris due to its low cost and easy deployment. However, it’s difficult for traditional optical telescopes to have both large aperture and wide FOV, making it impossible to achieve both observation depth and observation efficiency. We propose the computational imaging astrometry method to solve this problem. Based on a scientific CMOS detector and a small-aperture telescope with wide FOV, through strict correction of various astronomical effects and instrumental errors, we establish a high-precision overlay enhancement method for wide-FOV astronomic images. Including displacement overlay of high frame rate images at sub-pixel scale. In the case of no mechanical tracking device, the computational imaging astrometry method enables the observation system to simultaneously track multiple types of moving objects, and exert the ability of image overlay to reduce background noise, thus improving the SNR of the target and enhancing the observation depth of the system.

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