光学学报, 2018, 38 (4): 0422001, 网络出版: 2018-07-10   

基于同心多尺度成像的机载光电系统探测能力分析 下载: 865次

Analysis on Detection Capability of Airborne Optoelectronic System Based on Monocentric Multiscale Imaging
作者单位
1 西安电子科技大学物理与光电工程学院, 陕西 西安 710071
2 西安应用光学研究所, 陕西 西安 710065
摘要
同心多尺度成像技术为突破传统光学成像中分辨率与视场之间的矛盾提供了一条有效的途径。将同心多尺度成像模式应用于机载光电探测系统,实现机载广域宽视场高分辨目标探测。综合分析了目标辐射空间分布、目标辐射传输和光学系统成像等特性,建立了表征同心多尺度成像系统的探测能力理论模型,得到了系统探测能力与组成单元透镜的口径、焦距、间距等参数之间的变化关系。并用光学设计软件Zemax设计了实际光学系统,数值模拟了空中来袭运动目标的光谱信号信噪比(SNR)响应特征。结果表明合理增加同心多尺度成像系统中的物镜焦距、减小目镜焦距、增大系统口径和降低探测信噪比阈值等能够有效提高成像系统的探测能力。
Abstract
The technology of monocentric multiscale imaging provides an effective approach to overcome the contradiction between resolution and field of view in traditional optical imaging. In this paper, the model of monocentric multiscale imaging is applied in the airborne optoelectronic detection system to achieve the wide field of view and high-resolution detection of the target. We comprehensively analyze the characteristics about the space distribution and transmission of the target radiation, and the imaging performance of optical system. Then we establish the theoretical model of detection capability of the monocentric multiscale imaging system to obtain the variation relationship between the detection capability of the system and the parameters such as the aperture, focal length, and distance of the element lens. The actual optical system is designed by using the optical design software Zemax, and the response characteristics of the signal to noise ratio (SNR) of the spectral signal of the incoming moving target is numerically simulated. The results show that appropriately increasing the focal length of the objective lens, reducing the focal length of the eyepiece, increasing the aperture of the system and reducing the detection SNR threshold of the monocentric multiscale imaging system can effectively improve the detection capability of the imaging system.

吴雄雄, 王晓蕊, 郭冰涛, 袁航, 李珂, 袁影. 基于同心多尺度成像的机载光电系统探测能力分析[J]. 光学学报, 2018, 38(4): 0422001. Xiongxiong Wu, Xiaorui Wang, Bingtao Guo, Hang Yuan, Ke Li, Ying Yuan. Analysis on Detection Capability of Airborne Optoelectronic System Based on Monocentric Multiscale Imaging[J]. Acta Optica Sinica, 2018, 38(4): 0422001.

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