The paper describes the analyses of 3-D asymmetric temperature field by moire deflectometry. The method is based on measuring the deflection of rays from a collimated light beam due to gradients in refractive index. The deflection data were reduced from the deflecto-grams at 182 positions of 13 viewing angles, and the temperature field in a particular plan (Z=constant) was obtained by solving the inverse Radon transform.