A blog about Sunglasses

Polarized Sunglasses

Polarized Sunglasses can incredibly provide clear vision that is free from glares. Pilots were the first wearers of polarized sunglasses. They are able to see even when the sun is shining from different spots during daytime. Today, most people prefer wearing polarized sunglasses when fishing, golfing, and driving.

Polarized sunglasses suit people who are driving a lot during daytime. It keeps the sunlight from becoming very distracting. They will feel less tired. Headaches can be minimized during long trips. It makes driving cars or boats safer and enhances outdoor performances.

Fishermen can see more clearly through the waters when they wear polarized sunglasses. Even without sunlight, polarized sunglasses can deflect off the water. Visibility can be still achieved beyond the water surface. It is important to see through the water when fishing to determine if the area is infested with fish and other sea creatures. Polarized sunglasses are also helpful when boating. Boaters can protect their boats from sharp rocks underneath the water.

The sensitivity of the human eye to polarization is very weak especially without intervening filters. A very dim pattern is created by the polarized light near the visual field centers known as Haidinger’s brush. It is not easy to see this pattern unless a person knows how to detect polarized lights with his or her naked eyes.

Polarization can be observed through scattering when the light passes via the atmosphere. This scattered light creates the color and brightness in a clear sky. Once this scattered light is subjected to partial polarization, it can increase the contrast in such a way that darkening of the sky in a photograph is possible. During sunset, this effect is easily observed from the horizon angling 90 degrees from the setting sun. The brightness of the clouds and sky are drastically reduced. This is the reason why polarization filters are utilized in sunglasses. Other visible objects through polarized sunglasses include rainbow producing things caused by birefringent effects such as toughened glass of car windows and transparent plastics.

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Technorati : Polarized Sunglasses, driving, fishing, golfing, pilots, polarization