The cholesteric liquid crystal (CLC) layers show circular dichroism and thus they can be used in circular optical polarizers. The paper includes the analysis of conditions which the CLC material -for such a polarizer should fulfil. Cholesteric materials for circular polarizers of Nd glass laser radiation were selected. The dependence 0-F the CLC layers transmission on its temperature and thickness and on the radiation power density was investigated. Polarization properties of the CLC layers were investigated too. The optical quality of a model of liqud crystal polarizer was also researched.