อินฟราเรด กลางคืน วิสัยทัศน์ อุปกรณ์ อินฟราเรด กลางคืน วิสัยทัศน์ การถ่ายภาพ เทคโนโลยี
Red Visible light at night is very weak, but infrared rays invisible to the human eye are very rich. Infrared vision devices use photoelectric conversion technology to help people observe, search, aim and drive vehicles at night. Although people discovered infrared rays very early, the development of infrared remote sensing technology was slow due to limitations of infrared components. It was not until Germany developed lead sulfide and several infrared transmission materials in 1940 that the birth of infrared remote sensing instruments became possible. After that, Germany first developed several infrared detection instruments such as active infrared night vision devices, but they were not actually used in World War II. There are two types of infrared vision devices: active and passive: the former uses an infrared searchlight to illuminate the target and receives the reflected infrared radiation to form an image; the latter does not emit infrared rays and relies on the target's own infrared radiation to form a "thermal image", so it is also called "thermal image". Imager".
