The paper deals with the simulation calculation of the optical flow with SAD algorithm. Unlike other implementing optical flow calculation for 2D sensors, we used a sensor with concentrically arranged elementary detectors. In paper we deal with the realization of geometric log-polar transformation. This facilitated the creation of virtual concentric sensor from classical 2D sensor. We described the implementation of the calculation of optical flow for virtual sensor based on FPGA. We also discuss the properties of a new sensor for use it in anti-collision systems.