INFRARED RAY TRANSMISSION OPTICAL BODY

摘要

PROBLEM TO BE SOLVED: To provide an infrared ray transmission optical body which is excellent in infrared ray transmission property, water resistance and impact resistance at a low cost. SOLUTION: The infrared ray transmission optical body is characterized by consisting of an alkaline earth metal halide polycrystalline sintered compact and a polymer film covering the alkaline earth metal halide polycrystalline sintered compact.