We can supply a variety of lenses, such as day night infrared lens. At night, the main part of light is infrared light, and there is nearly no visible light. The infrared lamp is used in most part of supervised places at night since the ordinary lens can\'\'t meet the light requirement. In the past, the sensitive wavelength of CCD is visible light, which we can catch by lens and by which we are focusing the visible light then get the image of object. Therefore, the infrared light that can\'\'t be seen by human\'\'s eyes is invisible and fuzzy. In recent years, with the development of CCD technology, the sensitization sensitivity is extending to the field near to infrared. The mainstream cameras have the function of day -and- night convert on the market. The serial lenses of infrared night are specially developed for characteristic of CCD, they can focus on the formation of image at the same focus scene from the whole wave band of infrared light to visible light and can ensure the surveillance system to have the sharp image of the daytime and night. The serial band of RICOM infrared lens is up to 950nm longer than 850nm which is used by other company, compared to other\'\'s, the aperture is much bigger (1/1.1), so it can get the better function of night vision.