Infrared Optics Family LEDiL Infrared Optics Family offers a wide variety of IR reflectors, lenses, and holders to provide complete options for IR LEDs. This infrared family has many advantages over visible light in surveillance applications. It keeps lighting discreet and helps to conceal the camera's viewing direction. Infrared optics are invisible to the human eye and are suitable for long-distance illumination. Typical applications for LEDiL Infrared Optics include surveillance of large areas and spaces, military applications, and night vision systems.