Im Infrarotbereich arbeitende beugende Optik

摘要

The infra-red diffractive optical lens will remedy chromatism faults and offer excellent compactness; in addition, it does not call for a cooling device. It comprises a first convergent lens made of a material corresponding to the operational infra-red band width considered and a second convergent lens formed by a surface hologram. This hologram is obtained by accurate machining of one of the diopters of the first convergent lens according to machining data optimized by digital calculations. The first lens is preferably made of zinc sulfide. This system can operate simultaneously in the 8 to 12 microns infra-red band and the 1.06 microns laser channel.