Model driven-based extended target piston sensing for optical synthesis aperture imaging system

Kaiyuan Yang; Xiafei Ma; Haotong Ma; Zongliang Xie

doi:10.1117/12.3048097

13 December 2024 Model driven-based extended target piston sensing for optical synthesis aperture imaging system

Kaiyuan Yang, Xiafei Ma, Haotong Ma, Zongliang Xie

Author Affiliations +

Proceedings Volume 13496, AOPC 2024: Optical Sensing, Imaging Technology, and Applications; 1349613 (2024) https://doi.org/10.1117/12.3048097
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

The next generation of Earth observation on-orbit optical telescopes will provide high-resolution imaging of complex scene by using the aperture synthesis technique. Fast correction of pistons among each subaperture is the critical factor to preserve the synthetic image quality. Numerous point-spread function (PSF)-based methods have been proposed for piston detection, requiring a single star as a calibration source. When the exploration mission is similar as geological hazard monitoring and terrain landform analysis, the interference fringes that can characterize the piston will be submerged in the feature information of the complex scene, making it difficult to directly extract the pistons from the image. In this paper, by setting the non-redundant exit-pupil distribution, we innovatively construct the mathematical model of the eigenvector for extend target piston sensing, termed the frequency secondary-peak piston extraction (FSPE). Based on the polynomial fitting of piston response eigenvector, the high-precision real-time piston correction is achieved through the inverse solution of several quintic functions. The proposed method can directly use images captured by CCD detector for piston sensing without a calibration source and any other additional optics. Considering the simple operation and real-time performance of this method, we believe that it can further promote the application of synthetic aperture telescope for high-resolution Earth observation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kaiyuan Yang, Xiafei Ma, Haotong Ma, and Zongliang Xie "Model driven-based extended target piston sensing for optical synthesis aperture imaging system", Proc. SPIE 13496, AOPC 2024: Optical Sensing, Imaging Technology, and Applications, 1349613 (13 December 2024); https://doi.org/10.1117/12.3048097

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KEYWORDS

Eigenvectors

Optical transfer functions

Imaging systems

Modulation

Sensing systems

Frequency response

Image processing

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