Using special optical design, optical glass materials, coating and other technologies, the focal plane deviation of visible light and infrared light can be eliminated, so that different wavelengths of light can be imaged on the same focal plane, and the ghost and flash of backlight can be suppressed to improve the imaging quality. ICR infrared filter: realize day-to-night conversion. During the day, infrared rays are blocked from entering CCD, and only visible light is induced; At night or when the light is insufficient, stop working and allow infrared rays to enter imaging. IRCUT double filter: it is composed of infrared cut-off filter and full-spectrum optical glass. When the light is sufficient, the infrared cut-off filter works to restore the true color; When there is insufficient light at night, the full-spectrum optical glass works to improve the infrared performance.Application field: security monitoring: home, business place, traffic road, etc., to realize 24-hour monitoring and ensure safety at night or in low light environment. Industrial detection: detect abnormal temperature of equipment and circuit failure to prevent production accidents. Medical field: the core component of the body temperature gun, which measures the body temperature by capturing the surface temperature distribution of the human body; It is also used in medical research, disease diagnosis and so on. Consumer Electronics: Notebooks are used for face recognition, which can realize identity authentication in dark environment. Military field: infrared reconnaissance, target tracking, weapon aiming, etc.