Calibration-free imaging thermometry via two-line atomic fluorescence in combustion processes.

In this Letter, we demonstrate, for the first time (to the best of our knowledge), calibration-free imaging of full-frame temperature fields for particle-laden flames using two-line atomic fluorescence (TLAF) of indium. Measurements were carried out in laminar premixed flames with indium precursor aerosol added. The technique is based on the excitation of the 5