火焰辐射光场成像光线采样特性

发布时间：2019-06-19 06:07

【摘要】：为了研究全光相机对火焰等半透明介质的光场采样并优化全光相机的参数,基于近轴光学,建立了全光相机的逆向光线追迹模型。在此基础上,针对弥散介质沿采集方向的半透明特性,提出了像素采样锥形角以及物方采样角度等评价光线角度采样的性能指标,据此分析了全光相机像素和微透镜的位置对光场采样特性的影响,以及全光相机光学参数变化对光线方向采样性能的影响。结果表明:采集火焰辐射光场时,较小的微透镜直径有利于提高光场采样的单方向性,并减小主镜头入瞳直径,而较小的主镜头焦距有利于增大物方采样角度。
[Abstract]:In order to study the light field sampling of all-optical camera in translucent medium such as flame and optimize the parameters of all-optical camera, the reverse ray tracing model of all-optical camera is established based on paraxial optics. On this basis, according to the translucency characteristics of dispersion medium along the acquisition direction, the performance indexes of pixel sampling cone angle and object sampling angle are proposed to evaluate the light angle sampling. Based on this, the influence of the position of pixels and microlenses of all-optical camera on the sampling characteristics of light field, and the influence of the change of optical parameters of all-optical camera on the sampling performance of light direction are analyzed. The results show that when the flame radiation light field is collected, the smaller microlens diameter is beneficial to improve the unidirectivity of light field sampling and reduce the pupil diameter of the main lens, while the smaller main lens focal length is beneficial to increase the sampling angle of the object side.
【作者单位】：东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室;
【基金】：国家自然科学基金(51676044,51506030,51327803) 江苏省自然科学基金杰出青年基金(BK20150023)~~
【分类号】：TP391.41

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