Adopt digital micromirror devise (DMD) for wavefront correction and wavefront sensing in adaptive optical system

波前 光学 空间光调制器 数字微镜装置 自适应光学 剪切干涉仪 波前传感器 干涉测量 硅上液晶 全息术 计算机科学 数字全息术 物理 液晶显示器 天文干涉仪
作者
Hong-Je Liu,Shu-Sheng Lee,Hsiang‐Chieh Lee,Jiun-Woei Huang,Chih‐Kung Lee
标识
DOI:10.1117/12.3010020
摘要

This study introduces an advanced Adaptive Optics (AO) technique employing a Digital Micromirror Device (DMD) for effective wavefront correction. The innovation lies in utilizing the DMD as a Spatial Light Modulator (SLM), marking a departure from traditional methods that mainly used Liquid Crystal on Silicon (LCoS) for this purpose. With its high resolution (912×1440 pixels) and ultra-fast response, the DMD enhances the system's efficiency in correcting optical aberrations. By applying the Lee Hologram Method within off-axis binary holography, our approach generates inverse wavefronts to counteract environmental distortions, thereby improving image clarity. The integration of a DMD-assisted Lateral Shearing Interferometer, which adjusts the incident light angle through wavefront modulation, accelerates optical path difference (OPD) measurement. Implementing a Five-Step Phase Shifted Method for both X and Y directional fringe patterns facilitates rapid phase retrieval. This process, crucial for reconstructing and correcting wavefront aberrations, leverages the differential phase information from the Lateral Shearing Interferometer. Our experimental results affirm the system's effectiveness in not only rectifying wavefront distortions but also in showcasing the enhanced performance capabilities brought forth by the DMD-assisted Lateral Shearing Interferometer.

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