We develop a tunable diode laser absorption tomography algorithm for two-dimensional(2D)temperature reconstruction based on orthogonal optical paths.In order to evaluate the reconstruction method,we analyzed the 2Dreconstruction results of two different temperature phantoms by means of numerical simulation of N×N uniform grid arrangement consisting of 2 N(N≥3)light of sight(LOS)measurement path.The maximum deviation and the mean deviation were defined to describe the effect of the value of N on the reconstr...