Sunglasses - definition of lens function

Release time:

2020-08-07

According to the transmittance of visible light, the sunglasses can be divided into 1-4 categories from shallow to deep. Class I: light colored Sunglasses (without polarizing function), with 43% ~ 80% of projection, the lightest color, and the least shading and reducing excessive luminous flux. They are generally used for fashion matching glasses, such as model shows, fashion shows, etc. Class II: light colored sunshade mirror (without polarizing function), with transmission ratio of 18% ~ 43%, slightly light color, used in cloudy days or cloudy days. Three categories: sunshade (polarized sunglasses), projection accounted for 8% ~ 18%, most Sunglasses belong to this level, more suitable for seaside, mountaineering and other outdoor activities. Four categories: special purpose sunglasses, transmission ratio of 3% ~ 8%, in skiing, desert, welding and other special environment is more used. Note: according to the requirements, the transmittance of driving glasses should be greater than 8%, so the fourth type sunglasses are not suitable for driving. Polarizing function: the so-called polarizing sunglasses selectively filter the light from a certain direction. By filtering out many polarized light reflected, the intensity of light in the sky is reduced.

According to the transmittance of visible light, the sunglasses can be divided into 1-4 categories from shallow to deep.
Class I: light colored Sunglasses (without polarizing function), with 43% ~ 80% of projection, the lightest color, and the least shading and reducing excessive luminous flux. They are generally used for fashion matching glasses, such as model shows, fashion shows, etc.
Class II: light colored sunshade mirror (without polarizing function), with transmission ratio of 18% ~ 43%, slightly light color, used in cloudy days or cloudy days.
Three categories: sunshade (polarized sunglasses), projection accounted for 8% ~ 18%, most Sunglasses belong to this level, more suitable for seaside, mountaineering and other outdoor activities.
Four categories: special purpose sunglasses, transmission ratio of 3% ~ 8%, in skiing, desert, welding and other special environment is more used.
Note: according to the requirements, the transmittance of driving glasses should be greater than 8%, so the fourth type sunglasses are not suitable for driving.
Polarizing function: the so-called polarizing sunglasses selectively filter the light from a certain direction. By filtering out many polarized light reflected, the intensity of light in the sky is reduced.

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