Design of laser beam expander for LWIR spectrum range

Abstract: The paper presents the outcomes from designing laser beam expanders for LWIR spectrum range. Specifics of laser beam radiation have been given proper observation and a reference optical diagram selected. Three different materials such as ZnSe, Si and Ge have been used.The optical design has been carried out by means of primary synthesis, analysis and optimization. Two kinds of optimization have been effected with resultant expanders of diffraction-limited quality of the outgoing beam. I