High-precision and large-range deflection of light beams with fast steering mirrors.

IF 3.1 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2024-10-01 DOI:10.1364/OL.528045

Tianjin Mei, Ke Huang, Haoran Fang, Qirun Fan, Haoran Xiao, Qirui Xu, Xiaoxiao Dai, Qi Yang, Chen Liu

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引用次数: 0

Abstract

Fast steering mirrors (FSMs) offer a potential alternative for large-range deflection of light beams. However, for a large-stroke FSM, its pointing precision is unacceptably deteriorated due to the actuator non-uniformity, mechanical axis coupling, and the coupling of line-of-sight (LOS) kinematics. This Letter proposes a comprehensive beam-pointing algorithm by decoupling the LOS kinematic model and establishing a two-dimensional correction mapping to compensate for the non-uniformity and mechanical coupling. Moreover, the incident angle is calibrated by a non-contact method to construct the LOS kinematic model accurately. The experimental results proved that the beam-pointing accuracy can achieve a sub-milliradian level within the square field of regard (FOR) of ±25° horizontally and ±14° vertically. A pointing error of 0.87 mrad can be guaranteed within the horizontal range of -30° to 36° and the vertical range of ±24°. Therefore, the proposed method can achieve high-precision beam pointing in a large FOR and contributes to the miniaturization of optical systems.

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利用快速转向镜实现光束的高精度和大范围偏转。

快速转向镜（FSM）为光束的大范围偏转提供了一种潜在的替代方案。然而，对于大行程 FSM 而言，由于致动器的不均匀性、机械轴耦合以及视线（LOS）运动学的耦合，其指向精度会出现不可接受的恶化。本信通过解耦 LOS 运动学模型和建立二维校正映射来补偿非均匀性和机械耦合，从而提出了一种全面的光束指向算法。此外，还采用非接触方法校准入射角，以准确构建 LOS 运动学模型。实验结果证明，在水平方向为±25°、垂直方向为±14°的正方形视场（FOR）内，光束指向精度可达到亚毫米级。在水平方向 -30° 至 36° 和垂直方向 ±24° 范围内，可保证 0.87 mrad 的指向误差。因此，所提出的方法可以在较大的 FOR 范围内实现高精度光束指向，有助于实现光学系统的小型化。

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 letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.