Red laser pointer wavelength factors determine production volume
The color wavelength of the visible laser beam from short to long is: blue-violet (405nm), blue (445nm, 460nm, 473nm), green (532nm), yellow (589nm) and red (635nm, 650nm). Ultraviolet radiation has a shorter wavelength than violet visible light. Invisible infrared laser (808nm, 980nm, 1064nm) has a longer wavelength than visible red light. The wavelength of visible light that the human eye can clearly distinguish is basically between 400 nanometers and 700 nanometers. The shorter the wavelength of the laser, the bluer and more purple it is, until the ultraviolet rays are invisible to the human eye. However, the longer the wavelength, the more reddish it is, until the infrared rays are invisible to the human eye. The human eye is most sensitive to green, orange and yellow light with wavelengths between 550-570 nanometers. Therefore, in the visible light range, the wavelength can be understood as a digital identification of the color.
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Why are most blue laser pointer red? Studies have shown that red is not the most attractive light source, but green is because human eyes are more sensitive to this specific wavelength. And the light it emits is brighter than the red laser, and it can reach a greater distance than the red laser. It is cheaper to produce laser pointers that emit red light than other types of laser pointers. Laser pointers of other colors are not uninvented, but the red laser pointer is still the most economical choice.
2021-09-24 11:13:20
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