多波长激光探测微小摄像头机理研究  

Mechanism of multi-wavelength laser detection of micro-camera

作　　者：屈嘉惠 张海洋[1,2] 范瑜 汪林 王鹤颖 赵长明[1,2] QU Jiahui;ZHANG Haiyang;FAN Yu;WANG Lin;WANG Heying;ZHAO Changming(Key Laboratory of Photoelectronic Imaging Technology and System(Ministry of Education),Beijing Institute of Technology,Beijing 100081,China;School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Optoelectronic Countermeasure Testing and Evaluation Technology,Luoyang 471003,China)

机构地区：[1]北京理工大学光电成像技术与系统教育部重点实验室,北京100081 [2]北京理工大学光电学院,北京100081 [3]光电对抗测试评估技术重点实验室,河南洛阳471003

出　　处：《应用光学》2022年第4期809-818,共10页Journal of Applied Optics

基　　金：国防科技基础加强计划技术领域基金(2020-JCJQ-JJ-035)。

摘　　要：基于激光不同波段的探测传输特点,通过分析典型微小摄像头的回波传输特性,提出了一种针对多波长激光特征检测微小摄像头的研究方案。利用几何光学和波动光学理论,分析微小摄像头结构及其反射光谱特征,计算并仿真了一定探测距离下的回波光场,在此基础上搭建多波长激光检测系统。实验结果表明,在一定的景深范围内,具有红外截止滤光片的微小摄像头对可见光的回波光斑衍射环特征明显、条纹对比度高且可探测距离远;近红外波段的目标回波功率低、后向散射干扰严重,可探测距离近;短波红外波段几乎不受红外截止滤光片影响,且1550 nm处于人眼安全波段。实验结果与数值分析、理论仿真结果一致,验证了短波红外激光用于探测微小摄像头的可行性。Based on the detection and transmission characteristics of different wavelength bands of lasers,by analyzing the echo transmission characteristics of typical micro-cameras,a research scheme for multi-wavelength laser feature detection of micro-camera was proposed.The theories of geometric optics and wave optics were used to analyze the structure of the micro-camera and its reflection spectral characteristics,and the echo light field at a certain detection distance was calculated and simulated.On this basis,a multi-wavelength laser detection system was built.The experimental results show that within a certain depth of field,the micro-camera with infrared cut-off filter has the obvious echo spot diffraction ring characteristics for visible light,high fringe contrast and long detectable distance;in the near-infrared band,the target echo power is low,the back-scattering interference is serious,and the detectable distance is short;the short-wave infrared band is hardly affected by the infrared cut-off filter,and 1550 nm is in the eye-safe band.The experimental results are consistent with the numerical analyses and theoretical simulation results,which indicate the feasibility of short-wave infrared laser detection of micro-camera.

关 键 词：多波长探测 微小摄像头 猫眼效应 回波特性 

分 类 号：TN29[电子电信—物理电子学]