u003cbru003eIn addition to reducing the radiation intensity of visible light, sun
glasses can also reduce ultraviolet and infrared radiation. Polarized sun
glasses can also be used to eliminate horizontal reflections on water, snow, and gravel roads.
Sunglasses are more fashionable. But the fundamental role of
sunglasses is to provide radiation protection for the eyes. The basic requirements for sunglasses are: eliminate unnecessary radiation bands that may be harmful to the eyes; reduce the intensity of ambient light entering the eyes, provide clear and comfortable functional vision; maintain normal color vision, which is reflected in the rapid and accurate identification Traffic signal lights; maintain the amount of dark adaptation or night vision; good impact resistance and abrasion resistance. Recommend Anta sunglasses AT8005C1 black, stylish and elegant, light texture. The electromagnetic radiation related to the eyes is inseparable from light in daily activities of human beings. Generally, the light that the eyes can feel is the part of the spectrum with a wavelength of 380nm~760nm, which is called visible light (VIS). For visible light, the transmittance of the refractive medium of the eye is approximately 90%. This part of the light is only a small part of the electromagnetic radiation spectrum emitted by the sun, and is affected by the absorption and scattering of the earth's atmosphere. The electromagnetic spectrum that affects the eyes is mainly concentrated in visible light and its nearby wavebands. It is customary to call the part with a wavelength of 100nm~380nm as ultraviolet (UV), and the part with a wavelength of 760nm~1mm as infrared (IR). According to wavelength classification: (1) Ultraviolet (UV) is divided into: UVA, wavelength 315nm~380nm; UVB, wavelength 280nm~315nm; UVC, wavelength 100nm~280nm. (2) Infrared (IR) is divided into: IRA, wavelength 760nm~1400nm; IRB, wavelength 1400nm~3000nm; IRC, wavelength 3000nm~1mm.
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