Laser pens are a common item in our lives and are now used in work. For example, we use laser pens when we are doing speeches. So, is the laser pen using infrared light? This is a problem that many people are curious about. Today, Xiaobian will answer for everyone:
The red light emitted by the laser pen is not infrared light, and the infrared light is non-visible light that is invisible to the naked eye.
The principle of the red light emitted by the laser pen:
     Is the laser pen using infrared light? The laser pointer is also called a laser pointer, a stylus, etc., and is a processed emitter. Common laser pens have colors such as red, blue, green, and blue-violet, and the principle of laser pens for each color is different.
     The red laser pointer is the simplest structure. The reason why it is simple is that the red laser pointer is basically only a diode that uses energy from a battery, and has a laser diode that generates the wavelength.
     Infrared: An electromagnetic wave with a wavelength between microwave and visible light. The wavelength is between 760 nm and 1 mm, which is non-visible light longer than red light. Substances above absolute zero - 273.15 ° C can produce infrared rays, which modern physics calls heat rays. Medical infrared can be divided into two categories: near infrared and far infrared.
     The infrared wavelength is longer (radio, microwave, infrared, visible light, wavelength in order of length to short), giving the impression that it is a hot feeling, and the effect is a thermal effect.
     With some optical devices, people can feel the infrared rays. Usually, when an infrared camera receives infrared light, it converts it into visible green light, and the human eye never sees true infrared rays.
     Is the laser pen using infrared light? I believe that everyone has some understanding here, I hope to bring you help.
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