Quantitative results on optically induced director reorientation in an homeotropically aligned nematic film illuminated with the green line of an argon laser pump beam is presented. Total internal reflection has been used to measure both ordinary and extraordinary refractive indices and therefrom have been deduced first, the temperature profiles of the nematic within the illuminated region and second the surface tilt angle of the director, both for different pump powers. The temperature profiles have been found to be quite well fitted using gaussian shapes. The surface tilt angle in the center of the pump beam linearly depends on the pump power with a quasi threshold. behavior depending on the anchoring energies.