Three-dimensional temperature field measurement of flame using a single light field camera

Jun Sun, Chuanlong Xu, Biao Zhang, Md Moinul Hossain, Shimin Wang, Hong Qi, Heping Tan

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)
113 Downloads (Pure)


Compared with conventional camera, the light field camera takes the advantage of being capable of recording the direction and intensity information of each ray projected onto the CCD (charge couple device) sensor simultaneously. In this paper, a novel method is proposed for reconstructing three-dimensional (3-D) temperature field of a flame based on a single light field camera. A radiative imaging of a single light field camera is also modeled for the flame. In this model, the principal ray represents the beam projected onto the pixel of the CCD sensor. The radiation direction of the ray from the flame outside the camera is obtained according to thin lens equation based on geometrical optics. The intensities of the principal rays recorded by the pixels on the CCD sensor are mathematically modeled based on radiative transfer equation. The temperature distribution of the flame is then reconstructed by solving the mathematical model through the use of least square QR-factorization algorithm (LSQR). The numerical simulations and experiments are carried out to investigate the validity of the proposed method. The results presented in this study show that the proposed method is capable of reconstructing the 3-D temperature field of a flame.

Original languageEnglish
Pages (from-to)1118-1132
Number of pages15
JournalOptics Express
Issue number2
Publication statusPublished - 25 Jan 2016


  • charge couple device
  • three dimensional temperature field
  • flame imaging
  • rasiative imaging


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