What is the function of infrared perspective filter?

Infrared filter 850 wavelength infrared light introduction, sunlight contains rich and diverse rays, of course, also contains infrared light. When sunlight is reflected on an object and our eyes, we actually receive infrared light, but our optic nerve doesn't respond to it. All wavelengths of infrared filter are suitable for ambient infrared filter: according to the specifications of lens wavelength, it blocks filtered visible light and allows infrared light to pass through. Using it, the infrared effect can be separated in the mixed light environment of visible light and infrared light. 720nm is mainly aimed at digital cameras without infrared function (or when the infrared camera is in non-infrared shooting mode). Because 720 passes more visible light, infrared effect and visible light color coexist. Through some shooting skills and post-processing, we can get a color picture with semi-infrared effect, which is another wonder compared with the pure infrared picture taken by high-wavelength filter! 760nm 1\ Model with infrared function (DV/DC): outdoor and indoor venues on cloudy days. 2\ For cameras without infrared function, DC can get more pure infrared scenery than 720. 850nm infrared model is suitable for 850 to pass more infrared rays than 950, and is suitable for the environment with weak infrared rays. 950nm infrared model is suitable for 950 to completely filter out visible light. The light in summer is generally stronger than the other three seasons, and the infrared rays are abundant. Using 950 will not cause overexposure, and will get excellent pure infrared effect. If you focus on outdoor shooting, it will be your veritable summer favorite. 950 is suitable for the typical sunny outdoor in summer: the principle of infrared photography for beaches, parking lots and scenic spots. Ordinary film cameras can also take infrared photography, but they must be equipped with special infrared sensitive films and infrared filters. The CCD/CMOS photosensitive elements used in digital cameras/video cameras (hereinafter referred to as cameras) can sense infrared rays. In order to ensure that normal shooting will not cause color shift due to infrared interference, camera manufacturers are equipped with ICF in front of CCD to block infrared rays and pass visible light. Contrary to ICF, the function of infrared filter is to block visible light and let infrared light pass through. A camera with night shooting function is to remove this ICF by mechanical device, so that CCD can fully receive infrared rays! The function of infrared filter is to filter and cut off visible light while allowing infrared light to pass through. Through it, the infrared effect is separated in the environment where visible light and infrared light coexist. There are a lot of infrared rays in sunlight, but the coexistence of visible light interferes with infrared shooting, which makes the picture overexposed. Therefore, an infrared filter is needed to filter the visible light to obtain a pure infrared effect. There is no need to use infrared filters at night and in other dim visible light environments. If infrared photography is needed at this time, high-power infrared lamps must be configured for lighting. Suitable models for infrared photography: According to different applications of infrared characteristics, shooting can be divided into two directions. ◆ Infrared scenery photography ◆ The necessary conditions for infrared perspective to apply infrared photography are: 1, infrared sensitive imaging equipment 2, infrared filter 3, sufficient infrared light 4, shooting opportunities. When it comes to infrared photography, many people will associate it with the one-sided propaganda of "perspective" cameras in many media. In fact, whether it is digital DV or DC, what really has magical perspective effect is infrared. First, infrared rays pass through the first layer of material and reflect on the second layer of material below, and then pass through the first layer of material again. At this time, the first layer of material is translucent visually, which is the so-called perspective phenomenon. Then use related equipment to shoot the existing effects. The wavelength of infrared ray is higher than that of visible light, and it can easily penetrate some thinner substances that visible light cannot penetrate, such as chemical fiber fabric, plastic, brown glass, paint, dust, smoke and so on. These characteristics are widely used in military, scientific research, ecology, fire protection, medicine, public security and many other fields.