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Lei Duan

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Proceedings Article | 18 December 2023 Paper

Discussion on laser protection technologies for infrared imaging systems in the mid-wave band

Chunyu Han, Lei Duan, Zhiyong Peng, Liquan Song

Proceedings Volume 12960, 129600I (2023) https://doi.org/10.1117/12.3007716

KEYWORDS: Imaging systems, Laser applications, Infrared imaging, Wavefronts, Infrared radiation, Crosstalk, Laser systems engineering, Laser soldering, Laser energy, Laser countermeasures

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Infrared imaging systems are widely used on the battlefield. As the operational environment becomes increasingly complex, laser interference weapons pose a serious threat to infrared imaging systems. During the imaging process, infrared imaging systems are susceptible to laser interference, resulting in laser dazzle and loss of target detection ability. High laser power can also cause bad pixels to appear. This paper proposes four laser protection technologies from the perspective of reinforcing the infrared imaging system, combined with experiments, to address the 3.8μm mid-wave band laser interference faced by photovoltaic HgCdTe detectors. These technologies include: 1. Integration time adjustment technology, which reduces the area of the interference light spot by adjusting the integration time; 2. Imaging field adjustment technology, which reduces the convergence of laser energy and the optical system's gain by changing the instantaneous field of view size; 3. Spectral imaging technology, which filters out narrow-band laser energy; 4. Wavefront coding technology, which uses wavefront coding plates to disperse laser energy, then restores the image to achieve anti-interference effects.

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