What are polarized sunglasses like? What are the advantages? What brand is good?

A polarizer is made according to the polarization of light. We know that when sunlight is projected on the road or water, it will directly stimulate the eyes, making them feel dizzy and tired, and they can't see clearly for a long time. Especially when you are driving a car and engaging in outdoor entertainment activities, it will not only affect our work and entertainment mood, but even affect our judgment of objects and images, resulting in danger; Long-term direct sunlight can also lead to a rapid decline in vision, resulting in myopia, hyperopia, astigmatism or cataract. The special function of polarizer is to effectively eliminate and filter the scattered light in the beam. So that light can be injected into the human visual image on the light transmission axis on the correct track, and the visual field is clear and natural. Like venetian blinds's principle, adjusting the light to the same direction and entering the room naturally makes the scenery look soft and not dazzling. Second, the characteristics of the general polarizer Although the polarizer can filter out a lot of irregular light interference and avoid dazzling and dazzling phenomena, if the curvature of the lens itself cannot be in the optical and optical standard refraction state, the polarization effect will be weakened, affecting the authenticity of the image and poor durability. Ordinary polarized sunglasses on the market are made of fiber-sandwiched polarizing films. It is different from optical glass polarized sunglasses because of its soft texture and unstable arc bending. After the lens is assembled on the frame, it is difficult for the lens to reach the optical refractive standard, and the visual image is loose and deformed. Due to the instability of arc bending and the deformation of lens, the clarity of its transparent image is poor and the image is distorted, which can not play a normal visual effect. And the surface is easy to be scratched and worn. Not durable. 3. The ideal sunglasses should have the following important conditions: they must be able to filter out more than 99% ultraviolet rays in the sun, and the filtering performance can meet the requirements of international standards. Functional lenses can effectively block strong light. They have a standard optical arc design and form an optical axis to produce video. The eye frame is very firm, the frame material is excellent, and it has optical functional design, so it feels very comfortable and safe after wearing. Polarizing lens is a laminated material, which generally consists of seven layers. The outermost two layers are wear-resistant, and the second and sixth layers are wear-resistant. Polarized lenses have good anti-ultraviolet effect, but they are not wear-resistant and easy to scratch. Polarizers can block the disorderly reflected light, glare and irregular reflected light of objects under natural light. There are 300,000 linear molecular arrays invisible to the naked eye per 1 cm2 in the polarizer, which are arranged side by side and in the same direction. Compared with ordinary glass sunglasses, polarized sunglasses do not affect vision and will not cause color difference. Long-term color contrast will affect people's perception of color. At the same time, it can effectively avoid the damage of ultraviolet rays to eyes. Polarization principle: when light is reflected from the surface of an object, it has been partially polarized, resulting in glare. The negative effects of glare-first, enhance brightness, weaken color saturation, blur the outline of objects, and make eyes tired and uncomfortable. Polarizing glasses are made according to the polarization principle of light, which has a unique function of preferentially eliminating glare, and has special effects on drivers, which can improve vision and increase riding pleasure. Advantages of polarizer: glare of sunlight reflected on sand, water, snow and road surface often causes discomfort and fatigue of eyes. The polarization angle and radian of polarized sunglasses are designed according to the principle of precision optics. This kind of irregular reflected light can be effectively arranged and filtered (such as the shutter principle), and the light can enter the eyes in the same direction, making the surrounding scenery look soft and not dazzling.