Design of refracting reflecting infrared detection optical system with high spatial resolution

It's difficult for both a single pixel scanning detector and a pixel array detector to test minutely in infrared region. An infrared laser receptor was adopted to increase the spatial resolution of infrared laser detection. The receptor consisted of a high infrared sensitive material Carbon Nanotube film which could convert infrared light into visible light. A refracting reflecting optical system was designed to detect the visible light converted by the receptor which can increase the spatial resolution compared with the infrared system. The Cooke Triplet lenses were used to reduce the system field curvature. The refracting reflecting optical system was finally optimized to have high value of MTF and low field curvature, which make the high resolution infrared detection possible.