In the previous article, we discussed “What is special about cycling glasses?”. In this article, let’s talk about “What is the difference between polarized and gradient sunglasses?”.
Different Structure
The lens of polarized sunglasses is divided into two layers. A layer of the polarized light film is clipped in the middle of two layers of the lens. Polarized sunglasses selectively absorb some of the wavelengths that make up the sun's rays because they use fine metallic powders (iron, copper, nickel, etc.). The color of the lenses of the gradient sunglasses changes from dark to light. It looks more fashionable and beautiful. However, the effect of polarized light will be affected after the polarized lens is made into gradient color.
They are applicable to different occasions.
When taking photos of nature, polarized technology can be used to try to remove the reflection from the surface of the object. Polarized lenses are globally recognized as the most suitable lenses for driving. They are ineffective in portrait photography and are biased in color. However, in still life and landscape photography, polarized lenses are very useful to eliminate reflections from non-metallic objects, glass, water, or any other smooth surface. They are suitable for fishing, driving, sports, sailing, skiing, hunting, and other occasions.
Different Operating Principles
Polarized sunglasses are caused by silver halide crystals. Under normal conditions, it keeps the lens perfectly transparent. Under sunlight, the silver in the crystal is separated, and the free silver forms small aggregates inside the lens. Polarized lenses are particularly effective at blocking this light because of their filtering properties. The lenses only allow polarized waves that vibrate in a certain direction to pass through. For road reflections, using polarized sunglasses reduces the transmission of light because they don't allow waves that vibrate parallel to the road to pass through. Gradient sunglasses are sunglasses that don't have the same color across the lens, so they are darker at the top and lighter at the bottom, which gives a stylish look and makes you feel less dark when you look close.
Different Functions
Because of the function of light polarization, all the harmful light can be cut off by the polarized sunglasses but does not affect the visible light through. They can really achieve the function of eye protection. In addition to the basic anti-ultraviolet function, polarized sunglasses also have anti-glare, protection in road reflection light, water scale light, etc., suitable for driving, fishing, tourism, daily wear. Gradient sunglasses protect your glasses in bright light. In addition to the shading and beauty effect, gradient sunglasses are better than monochrome sunglasses when it comes to near objects.
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