Infrared Light Introduction

Infrared is one of the many invisible rays in the sun's rays. It was discovered by German scientist Hodge in 1800. Also known as infrared thermal radiation, he splits the sunlight into prisms in various colors. A thermometer was placed in the position to try to measure the heating effect of light of various colors. It was found that the thermometer located outside the red light warmed up the fastest. Therefore, it is concluded that in the solar spectrum, the outside of the red light must have invisible light, which is infrared light. It can also be used as a medium for transmission. The wavelength of the infrared ray on the solar spectrum is larger than the visible ray, and the wavelength is 0.75 to 1000 μm. Infrared can be divided into three parts, namely near-infrared, with a wavelength between 0.75 and 1.50 μm; mid-infrared, with a wavelength between 1.50 and 6.0 μm; far infrared, with a wavelength between 6.0 and 1000 μm, while infrared is on the infrared lamp. The use is very wide.

    Light rays other than red light that are invisible to the naked eye and have a thermal effect are called infrared rays. It is a light segment whose wavelength is longer than visible light and invisible to the naked eye. Infrared light is one of many invisible rays in the sun's rays. It was discovered by German scientist Hodge in 1800, also known as infrared thermal radiation, on the solar spectrum. The wavelength of the infrared ray is larger than the visible ray, and the wavelength is 0.75 to 1000 μm. Infrared can be divided into three parts, namely near-infrared, with a wavelength between 0.75 and 1.50 μm; mid-infrared rays with a wavelength between 1.50 and 6.0 μm; and far infrared rays with a wavelength between 6.0 and 1000 μm.

    The true infrared night vision device is a photomultiplier tube imaging. It is completely different from the telescope principle. It can not be used during the day, it is expensive and requires power to work.