What Are Polarized Lenses for?
If you’re thinking about ditching your oversized collection of cheap sunglasses and getting a quality pair that you love — you’ve got options for protecting your eyes and minimizing discomfort. Polarization is an excellent option for some because of the way it minimizes glare.
But you might be wondering what polarized lenses are really good for, and that’s understandable. Whether you’ve got a prescription or not, there are a few situations where polarized sunglass lenses might really benefit you.
Sunlight
Many of us seek out sunlight for the joy it brings us, even in winter. In places with more cloudy and rainy days, there is a phenomenon called negative sun. People force themselves to give up all indoor activities and go outdoors to find the rare sunshine. But direct sunlight can be harmful and bad for the eyes.
The sun is a giant nuclear reactor. It can exclude all kinds of radiation, including gamma rays, X-rays, visible light, infrared, ultraviolet, and even radio waves. After passing through the atmosphere, sunlight is a filtered version of itself. The ozone layer cuts out the most dangerous parts, such as UV-C light, X-rays and super-intense gamma radiation.
But visible light and UV light pass through, causing discomfort and possible harm without UV filtering. Many people worry about reducing the brightness of direct sunlight. These visible light waves all mix together, disperse, converge and overlap, reflecting and refracting (like bouncing) through surfaces on the ground.
Polarized sunglasses
The polarizer filters and eliminates all kinds of glare that damage the eyes by using the linear molecular array inside its lens, that is, the polarizer combs the irregular reflected light through the linear molecular array in its lens, so that the light that is cast into the eyes is clearer and natural.
The difference between polarized and unpolarized Sunglasses
To talk about polarizing glasses and non polarizing sunglasses, we must first introduce some knowledge of polarizing glasses and non polarizing sunglasses. In fact, the polarizer is also a kind of sunglasses. However, the polarizer is a relatively high-end type of sunglasses. The polarizer has the effect that ordinary sunglasses do not have. This effect is to effectively block and filter out all kinds of polarized light harmful to the eyes.
The so-called polarized light is the irregular reflected light generated when the light passes through the uneven road surface, water surface and other places, which is also called glare. When these rays directly irradiate people's eyes, they will make people's eyes uncomfortable and prone to fatigue. They cannot see objects for a long time, and the clarity of the objects they see is obviously insufficient.
What is the difference between polarizing glasses and non polarizing sunglasses?
Methods / steps
First of all, polarizers and ordinary sunglasses have the function of preventing ultraviolet rays and reducing the intensity of light, but ordinary sunglasses do not have the function of separating or converting polarized light. This is the difference between polarizing glasses and non polarizing sunglasses. Therefore, the price of general sunglasses is relatively cheap compared to polarized sunglasses. Polarized sunglasses can block the damage of strong light to your eyes. For example, if you are driving, you can see the water on the road at night on rainy days, so you can't see the road clearly. In addition, the high beam of the opposite car is turned on, so you can't see the road ahead. However, wearing Polarized Sunglasses won't happen because it can block strong light. Ordinary sunglasses can block strong light very limited, So polarized sunglasses can protect your eyes. The principle of polarized sunglasses is the same as that of louvers. The louvers can't see the inside, but the inside can see the outside well. Polarized sunglasses are similar to this principle. Polarized sunglasses are also more expensive than ordinary sunglasses.
Simply put, polarized sunglasses are the best in sunglasses. We know that natural light (non polarized light) is composed of electromagnetic waves that vibrate in a specific direction, and the reflected or scattered light usually prefers a specific direction. When the natural light is filtered by the polarizing lens, only one direction of light can pass through. That is to say, the polarizing lens can first polarize the light, and then only one direction of light can pass through (visible light). Polarized sunglasses use this property to block harmful light, because no matter whether the sunlight touches any object, it will produce harmful glare due to natural reflection or refraction. Polarized sunglasses can fully absorb these strong lights that will cause eye irritation and eye damage. Ordinary Sunglasses only use the function of reducing light. Because ordinary lenses can not filter light, they can only reduce the intensity of glare and ultraviolet light, and can not completely block these harmful light. Therefore, their function is only to reduce the damage to the eyes. However, the greatest advantage of ordinary sunglasses is good popularity. Polarizing lenses can completely block glare caused by scattering, refraction, reflection and other factors due to their polarizing properties. At the same time, it can also completely block the ultraviolet light harmful to human eyes, so that people's eyes are not easily tired when they are in strong light for a long time, and achieve the function of real protection, and make the things they see more clear and three-dimensional.
The biggest difference between polarized sunglasses and ordinary Sunglasses lies in the treatment of reflected light. In our living environment, there are three kinds of light: direct light, reflected light and diffused light. Among them, diffused light is the most important light that our eyes can see objects, which we cannot perceive at ordinary times; Direct light has a fixed light source (such as the sun), so long as we pay attention to it, it will not cause harm to our life. These common reflectors in life often reflect light suddenly, which will bring a lot of inconvenience to our life. For example, the rear-view mirror in front of the driver is an uncertain reflection light source. The water surface on the side of the road or the smooth flat objects carried by passers-by can become the reflection light source. These reflected lights may cause trouble or even danger to the driver's driving.
How to identify polarizing lenses
The following provides several simple and feasible methods:
1. If there is no description of the polarizing lens on the lens and the sun polarizing glasses that are not marked on the manual, try not to buy them. Generally speaking, as long as they are marked, they will be marked in an obvious place. Only some businesses describe the sunglasses that are not polarizing technology as polarizing, so as to confuse the public and prevent consumers from having the right to know. In general, polarizing sunglasses are pasted with obvious static label of polarizing lens material on the lens, or polarizing lens is indicated on the product tag. 2. When purchasing polarized sunglasses, you can use polarized test pieces for testing. Some patterns on the test piece cannot be recognized by the naked eye, but can be clearly recognized through the polarizing lens. 3. Buy Sunglasses with polarizing lens instructions from international famous brands. At present, many small brands of polarized sunglasses on the market have anti polarization words on the lenses, misleading consumers.
Several points should be paid attention to when purchasing polarizer:
In order to prevent bad merchants from setting traps, friends should pay attention to identification when purchasing polarized sunglasses. 1. You can also go to the bottom of the sun for specific experience. Under the sunlight, the polarizer will be much more comfortable than ordinary sunglasses. 2. Of course, the difference between polarizer and sunglasses is also clearly reflected in the price. Polarizer sunglasses are more expensive than ordinary sunglasses. If it is too cheap, it must not be polarized sunglasses
Post time: Sep-09-2022