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Focal Length 19mm F1.0 Infrared Chalcogen Athermal Lwir Optical Germanium Lens for 640X512-17um Detector, Find Details and Price about Infrared Germanium Lens Lwir Optical Lens from Focal Length 19mm F1.0 Infrared Chalcogen Athermal Lwir Optical Germanium Lens for 640X512-17um Detector - Nanjing Rising Opto-Electronic (S) Co., Ltd.