[en] A short review of coding circuits intended for reducing a number of photomultipliers and increasing the speed of physical event analysis is presented. Special characteristics of codes useful for hodoscopes with light coding and methods for designing such codes are considered. Such codes can be designed by analytical calculations. An application of analytical method for coding circuit analysis using computer allows one to make an analysis of parameters of codes and design coding circuits with given properties. The parameters and methods of designing the codes for registration of clusters and registration of multiplicity of two and three are given