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Mid-wave infrared(MWIR)and long-wave infrared(LWIR)two-band scene simulation system is a kind of testing equipment that used for infrared two-band imaging seeker.Not only it would be qualified for working waveband,but also realize the essence requests that infrared radiation characteristics should correspond to the real scene.Past single-digital micro-mirror device(DMD)based infrared scene simulation system does not take the huge difference between targets and background radiation into account,and it cannot realize the separated modulation to two-band light beam.