中文摘要：

相比于传统相机,光场相机不仅可记录投射到相机探测器上光线的强度,而且能分辨光线的方向。本文在光场成像技术基础上,提出一种基于单光场相机的火焰三维温度场测量新方法。建立了基于光场成像的火焰辐射正向计算模型,追迹了燃烧火焰投射到光场相机探测器上每个像素对应的辐射光线,并用源项六流法（SSF）计算了对应光线的辐射强度,获得了光场相机探测面强度分布。建立了基于QR分解的最小二乘算法温度场反演模型,获得了火焰的三维温度场,并对温度场反演结果进行了分析。计算结果证明了该方法测量火焰三维温度场的可行性。

英文摘要：

Compared with conventional camera,light field camera can record not only the intensity of each ray projected onto the CCD sensor but also its direction.In this paper,a novel method is proposed for measuring three-dimensional（3-D） temperature field of a flame using a single light field camera.A radiative imaging of the light field camera is modeled for a flame and the principal ray projected onto each pixel is then traced to calculate the radiative intensity distribution on photosensor using Source Six Flux（SSF） method.The three-dimensional temperature distribution of the flame is reconstructed by least square QR-factorization algorithm（LSQR）,and the reconstruction results are further analyzed.The numerical results show that the proposed method is capable of reconstructing the 3-D temperature field of a flame.