Experimental evaluation of tilted secondary mirror-based forward motion compensation in high-resolution earth observation systems

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-26 DOI:10.1016/j.optcom.2025.132512

Özgür Selimoğlu , Ümit Yılmaz , M. Fatih Kılıçaslan

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Abstract

This study comprehensively investigates the utilization of the opto-mechanical Tilted Secondary Mirror Method for Forward Motion Compensation (TSM-FMC) in satellite cameras. Unlike the approaches existing in the literature, the forward motion caused by the orbital movement of the satellite has been compensated by intentionally misaligning the secondary mirror of the Ritchey-Chretien (RC) Cassegrain telescope by applying tilt movement to generate image flow in reverse direction. The primary objective is to offer a cost-effective and mechanically simpler alternative to Time Delay Integration (TDI) sensors and scanning mirrors, which are widely used in high-resolution Earth Observation Satellite (EOS) cameras. In order to simulate the effects of satellite orbital motion a laboratory-based imaging simulator has been used. The experimental studies have demonstrated that satellite camera exposure time can be increased by 52 times and that focal plane image shifts due to satellite orbital motion can be compensated with a residual pixel shift of 0.62.

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高分辨率对地观测系统中基于倾斜二次镜的前向补偿实验评价

本文对卫星相机前向运动补偿（TSM-FMC）的光学-机械倾斜次反射镜方法进行了全面的研究。与文献中现有的方法不同，卫星轨道运动引起的前向运动通过利用倾斜运动产生反方向的图像流来补偿，这种方法是故意将里奇-克雷蒂安（RC）卡塞格伦望远镜的副镜错位。主要目标是提供一种经济有效且机械简单的替代时间延迟集成（TDI）传感器和扫描镜，后者广泛用于高分辨率地球观测卫星（EOS）相机。为了模拟卫星轨道运动的影响，采用了实验室成像模拟器。实验研究表明，卫星相机的曝光时间可以增加52倍，卫星轨道运动引起的焦平面像移可以用0.62的残差像移来补偿。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.