Views:130 Author:Site Editor Publish Time: 2020-07-13 Origin:Site
UV sunglasses are divided into anti-glare sunglasses and anti-reflective sunglasses. Glare and reflection are terms that are often confused with each other. Many people will not understand the difference between the two. Here is a comparison of anti-reflection and anti-glare glasses.
Anti-glare sunglasses are manufactured according to the principle of polarization of light. Visible light is a transverse wave, and its vibration direction is perpendicular to the propagation direction. The vibration direction of natural light is arbitrary in the plane perpendicular to the propagation direction. For glare, its vibration direction is limited to a specific direction at a certain moment. In addition to sunlight and ultraviolet rays, glare will be generated when light passes through uneven roads, water surfaces and other places. The appearance of glare will make people's eyes uncomfortable, produce fatigue, and affect the clarity of vision. Anti-reflective sunglasses can only reduce the intensity of light, and it can not effectively remove the glare in all directions. In addition to anti ultraviolet and reducing the intensity of light, anti-glare sunglasses can also effectively filter out glare.
Anti-reflection sunglasses are often used to block sunlight and ultraviolet rays. In the sun, people usually adjust the pupil size to adjust the luminous flux. When the light intensity exceeds the adjustment ability of the human eye, it will cause damage to the human eye. Anti-reflection sunglasses can block uncomfortable strong light, while protecting the eyes from ultraviolet rays. Therefore, in outdoor activities, especially in summer, many people use anti-reflection sunglasses to block the sun to reduce the fatigue caused by eye adjustment or the damage caused by strong light stimulation.
The general anti-glare glasses on the market are made of fiber sandwiched polarizing film. It is different from optical glass polarized sunglasses, because of its soft texture and unstable arc bend. After the lens is assembled to the frame, it is difficult for the lens to meet the optical refractive standard, and the image is loose and deformed. Due to the instability of the arc bend, the lens is deformed, which directly leads to the poor definition of the light transmission junction image, the image distortion. People can choose sunglasses according to their own preferences and different uses. The basic functions of sunglasses are to reduce the strong light stimulation, keep the vision clear, prevent ultraviolet rays, keep the color recognition undistorted and accurately identify the traffic signals.
Anti-glare eyeglasses are mainly used in the following scenes because they can block harmful light 100%.
1. Patients with eye surgery need all-round protection, so polarized sunglasses are the best choice.
2. For some outdoor activities, such as skiing, fishing, water sports, it need sunglasses that can completely block harmful light to avoid eye injury or fatigue.
3. It is also suitable for driving, traveling and daily wearing.
1. The two anti-glare lenses are vertically stacked if they are opaque, indicating a true anti-glare lens. Because anti-glare lens is specially designed to only let parallel light pass through the lenses, most of the light will be blocked when the two lenses are vertically stacked.
2. Use the mobile phone to identify the anti-glare lens. Select a picture on the mobile phone. If you put the anti-reflection glasses in front of the mobile phone screen and rotate it, there is no change in the mobile phone screen. If you put the anti-glare glasses in front of the phone and turn it, you can see through the lens that the screen of the phone becomes bright and dark, and the light and shadow change is very obvious.
The damage of ultraviolet rays to the human body is cumulative. The longer the exposure to sunlight, the greater the damage of ultraviolet rays. Therefore, if you want to avoid ultraviolet rays causing eye damage, remember to wear appropriate reflector sunglasses.