基于Zemax仿真的红外光场成像技术

光场成像作为计算摄影学的研究方向之一，可以通过单次拍摄得到目标的四维全光信息，包括空间两维以及角度两维信息，由此可以通过多视角立体匹配原理实现三维成像。目前光场成像集中应用于可见光领域，用于其他光学成像波段的情况较为少见。本文提出基于Zemax仿真的红外光场成像技术，将光场成像系统与长波红外成像系统相结合，从光场成像原理以及长波红外成像特性出发，对长波红外光场成像系统结构设计进行了深入研究，同时为了提升三维成像的效果，分析了红外光场成像系统光学参数对深度分辨率的影响，得出深度分辨率主要由微透镜成像关系、微透镜工作F数、主透镜焦距、物距以及探测器像素尺寸确定。针对长波红外探测器像素数较少的情况选择了聚焦型光场成像系统，根据设计结果，使用Zemax仿真验证了长波红外系统与光场成像系统相结合的可行性以及理论设计的正确性。

Design of LWIR light field imaging system based on Zemax simulation

As one of the research directions of computational photography,light field imaging can be used to obtain four dimensional plenoptic information of a target in a single shot,including spatial two dimensional and angular two dimensional information,which can realize three dimensional imaging through the principle of multi view stereo matching.At present,light field imaging is concentrated in the field of visible light,and applications in other wavelength bands are less common.In this paper,an infrared light field imaging system based on Zemax simulation combining the light field imaging system with the long wave infrared imaging system is proposed.Starting from the principle of light field imaging and the characteristics of infrared imaging,the structural design of the long wave infrared light field imaging system is studied in depth.At the same time,in order to enhance the effect of three dimensional imaging,the influence of optical parameters on depth resolution of the infrared light field imaging system is analyzed,and the depth resolution is mainly determined by microlens imaging relationship,the microlens working F number,the focal length of the main lens,the object distance and the detector pixel size.A focused light field imaging system is chosen for few pixels in the LWIR detector.According to the design result,Zemax simulation is used to verify the feasibility of the combination of two systems and the validity of the theoretical design.