The high speed flow optical transmission effect is a key to high speed missile using infrared image terminal guidance technology. In this paper, computing methods of the optical transmission distortions throughout the laminar flow field in aero-optical effects are described. Image shift and low blur brought by laminar flow are calculated using optical methods of ray trace and physical optics. The approaches and some simulation results are presented with computed data of high speed flow field. Comparison with the engineering results shows that the high speed flow field optical transmission theory model is correct and the numerical simulation software can be used to analyze the aero-optical effects