基于数字微镜区域翻转的强光干扰抑制技术

汤佐; 王晓恒; 毛叶飞; 赵若晨; 赵宝珍; 常慧聪; 杨昌; 肖林

doi:10.37188/CO.2025-0095

基于数字微镜区域翻转的强光干扰抑制技术

doi: 10.37188/CO.2025-0095

cstr: 32171.14.CO.2025-0095

中国航天科技体系与创新研究院, 北京 100048

基金项目: 国家自然科学基金企业创新发展联合基金（No. U24B2009）

详细信息

作者简介:
汤　佐（1997—），男，贵州毕节人，博士研究生，主要从事光学探测系统设计方面的研究。E-mail：tangzuo2024@163.com

肖　林（1982—），男，福建将乐人，博士毕业于清华大学，研究员，从事航天先进探测技术研究。E-mail：xiaolin_82@163.com

中图分类号: O439;TN977
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出版历程
- 收稿日期: 2025-07-08
- 修回日期: 2025-09-02
- 录用日期: 2025-09-18
- 网络出版日期: 2025-09-27

Intense light interference suppression technique based on regional flipping of digital micromirror device

China Academy of Aerospace System and Innovation, Beijing 100048, China

Funds: Supported by Enterprise Innovation and Development Joint Fund of the National Natural Science Foundation (No. U24B2009)

More Information

Corresponding author: xiaolin_82@163.com

摘要

摘要:
为应对强激光对光电探测器成像的干扰与致眩威胁，本文提出并验证了一种基于数字微镜器件（DMD）区域翻转的动态激光干扰抑制方法。该方法通过一个二次成像光路，将DMD置于一次像面，通过实时识别并翻转对应于激光干扰区域的微镜，将高功率干扰能量偏转出主光路，从而在保护探测器的同时保留大部分视场的有效图像信息。我们首先通过光学仿真验证了该方案的可行性，随后搭建实验平台进行了系统性测试。此外，本研究还量化控制DMD翻转的掩膜半径对抑制效果的影响，验证了当翻转区域大于干扰光斑时能达到最优抑制效果。实验结果表明，DMD区域翻转对不同功率和不同入射角的激光干扰均能实现有效抑制。与无抑制时相比，探测器接收的干扰功率显著降低：在激光离轴入射时实现超过28.5 dB的抗激光干扰阈值提升，当激光干扰平行于光轴入射时可实现超过30 dB的抗激光干扰阈值提升。与传统图像处理方法相比，该方法在强光干扰场景下能尽可能保留图像信息量。该技术为光电系统在强光干扰环境下保持稳定成像提供了高效、简洁的解决方案。
- 数字微镜器件(DMD) /
- 强光干扰抑制 /
- 掩膜生成 /
- 区域翻转
Abstract:
To address the interference and dazzling threats posed by high-power lasers to the imaging 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 quantifies the influence of the mask radius controlling DMD flipping on the suppression effect, verifying 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 across different laser powers and incident angles. Compared with the scenario without suppression, the interference power received by the detector is significantly reduced: when laser incidence is off-axis, the laser interference resistance threshold is increased by more than 28.5 dB; when laser interference occurs with incidence parallel to the optical axis, the laser interference resistance threshold can be enhanced by more than 30 dB. In comparison with traditional image processing methods, this method can retain the maximum amount of image information under strong light jamming scenarios. Technology provides an efficient and concise solution for photoelectric systems to maintain stable imaging in strong light interference environments.
- digital micromirror device (DMD) /
- intense light interference suppression /
- mask creation /
- regional flipping

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图 1 激光干扰抑制原理图

Figure 1. Block diagram of laser interference suppression principle

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图 2 仿真模型示意图

Figure 2. Schematic diagram of the simulation model

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图 3 仿真模型点列图

Figure 3. Spot diagram of the simulation model

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图 4 仿真模型MTF

Figure 4. MTF of the simulation model

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图 5 实验装置

Figure 5. Experimental Device

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图 6 成像效果

Figure 6. Imaging performance

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图 7 激光干扰及抑制效果示意图

Figure 7. Schematic diagram of laser interference and suppression performance

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图 8 不同功率密度激光干扰下成像效果图

Figure 8. Imaging performance under laser interference with different power density

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图 9 不同入射角光线示意图

Figure 9. Schematic diagram of light rays with different incident angles

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图 10 不同入射角探测器成像效果

Figure 10. Imaging performance of detectors at different incident angles

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图 11 不同入射角下受激光干扰图像

Figure 11. Images under the interference laser with different incident angles

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图 12 不同翻转半径下激光干扰抑制效果示意图(入射角0°)

Figure 12. Schematic diagram of laser interference suppression performance under different flip radii (incidence angle 0°)

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图 13 不同翻转半径下激光干扰抑制效果示意图(入射角18°)

Figure 13. Schematic diagram of laser interference suppression performance under different flip radii (incidence angle 18°)

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图 14 不同功率激光干扰抑制效果图(入射角0°)

Figure 14. Diagrams of laser interference suppression under different powers (incidence angle 0°)

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图 15 不同方法对激光干扰抑制效果对比

Figure 15. Comparison of laser interference suppression effects among different methods

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图 16 不同入射角激光干扰抑制效果对比

Figure 16. Comparison of laser interference suppression effects with different incident angles

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表 1 不同入射角下激光干扰在焦平面处功率Interference laser power with different incident angles at the focal plane

入射角（°）	0	6	12	18
功率（μW）	80.9	91.7	66.8	57.0

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表 2 不同翻转半径激光干扰抑制后探测器接收功率密度

Table 2. Detector received power density laser interference suppression with different flip radii

掩膜半径（pixel）	抑制后功率（μW）（入射角0）	抑制后功率（μW）（入射角18°）
10	2.49	3.37
20	0.62	0.72
30	0.43	0.46
40	0.39	0.40
50	0.35	0.36

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表 3 干扰抑制前后探测器接收功率对比 (入射角0°)

Table 3. Comparison of detector received power density before and after interference suppression (incidence angle 0°)

入瞳处激光干扰功率密度（W/cm²）	焦平面抑制前功率（μW）	焦平面抑制后功率（μW）	抑制能力（dB）
2.32×10⁻²	431.0	0.43	30.01
1.56×10⁻²	273.0	0.27	30.05
8.31×10⁻³	150.2	0.15	30.01
2.83×10⁻³	52.0	0.05	30.17
1.73×10⁻³	32.1	0.03	30.29
1.33×10⁻³	24.6	0.02	30.90
8.99×10⁻⁴	16.67	0.01	32.22

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表 4 干扰抑制前后探测器接收功率对比 (入射角6°)

Table 4. Comparison of detector received power density before and after interference suppression (incidence angle 6°)

入瞳处激光干扰功率密度（W/cm²）	焦平面抑制前功率（μW）	焦平面抑制后功率（μW）	抑制能力（dB）
2.32×10⁻²	794.0	0.53	31.76
1.56×10⁻²	462.0	0.31	31.73
8.31×10⁻³	294.0	0.20	31.67
2.83×10⁻³	91.7	0.06	31.84
1.73×10⁻³	59.38	0.04	31.72
1.33×10⁻³	42.28	0.03	31.49
8.99×10⁻⁴	30.71	0.02	31.86

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表 5 干扰抑制前后探测器接收功率对比 (入射角12°)

Table 5. Comparison of detector received power density before and after interference suppression (incidence angle 12°)

入瞳处激光干扰功率密度（W/cm²）	焦平面抑制前功率（μW）	焦平面抑制后功率（μW）	抑制能力（dB）
2.32×10⁻²	542.0	0.76	28.53
1.56×10⁻²	308.0	0.40	28.86
8.31×10⁻³	201.0	0.26	28.88
2.83×10⁻³	66.8	0.08	29.22
1.73×10⁻³	42.4	0.05	29.28
1.33×10⁻³	30.8	0.04	28.86
8.99×10⁻⁴	21.91	0.03	28.63

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表 6 干扰抑制前后探测器接收功率对比(入射角18°)

Table 6. Comparison of detector received power density before and after interference suppression (incidence angle 18°)

入瞳处激光干扰功率密度（W/cm²）	焦平面抑制前功率（μW）	焦平面抑制后功率（μW）	抑制能力（dB）
2.32×10⁻²	422.0	0.40	30.23
1.56×10⁻²	232.0	0.23	30.04
8.31×10⁻³	154.0	0.13	30.74
2.83×10⁻³	57.0	0.05	30.57
1.73×10⁻³	37.8	0.03	31.00
1.33×10⁻³	28.7	0.02	31.56
8.99×10⁻⁴	21.2	0.02	30.25

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