基于数字微镜区域翻转的强光干扰抑制技术

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关键词：数字微镜器件（DMD）;强光干扰抑制;掩模生成；区域翻转中图分类号：O439：TN977 文献标志码：A doi：10.37188/CO.2025-0095 CSTR：32171.14.CO.2025-0095

Abstract： To address the interference and dazzling threats posed by high-power lasers to the imaging performance photoelectric of detectors， this paper proposes and validates a dynamic laser interference suppression method based on regional flipping of digital micromirror device （DMD）. This method employs a secondary imaging optical path， placing the DMD at the primary image plane. Through real-time identification and flipping of micromirrors corresponding to the laser interference region， high-power interference energy is deflected out of the main optical path， thereby protecting the detector while retaining effective image information of most of the field of view.First， we verified the feasibility of this scheme through optical simulations， and subsequently built an experimental platform for systematic testing. Furthermore， this study quantitavily analyzes the influence of the mask radius， which controls the flipping of the DMD，on the suppression effect. It verifies that the optimal suppression effect is achieved when the flipped region is larger than the interference spot. Experimental results demonstrate that DMD regional flipping nethod can effectively suppress laser interference with different laser powers and incident angles. Compared with the scenario without suppression， the interference power received by the detector is significantly reduced： when the laser is incident of-axis， thelaser interference resistance threshold is increased bymore than 28.5dB ；when the laser interference is incident parallel to the optical axis，the laser interference resistance threshold can be enhanced by over 30 dB. In comparison with traditional image processing methods， this method can retain as much image information as possible under scenarios of strong light interference. This technology provides an eficient and concise solution for photoelectric systems to maintain stable imaging in strong light interference environments.

Key words： digital micromirror device （DMD）; intense light interference suppression; mask creation; regional flipping

1引言

光电探测器由于具有灵敏度高、响应迅速、线性度好等优点，在探测识别、无人驾驶、医疗诊断等领域得到广泛应用。（剩余13155字）