An Introduction to Polarized lenses

Polarized lenses are made used in sunglasses to decrease glare from corresponding reflective surface such as the surface of a lake or a lid of a car. They normally achieve this feat through a process known as polarization, more like Venetian blind controls sunlight through a window.

Sunlight itself is not polarized; it would either be absorbed or reflected horizontally, diagonally or vertically. The problem causes for fishermen and drivers lies in the horizontal reflectivity. Sunlight pouring off a horizontal surface would strike the viewer’s eyes at the same angle. This simply means the glare from surface of the water or the road or the car lid would be strong. Polarized sun glasses have a laminated surface containing vertical stripes. These stripes only permit vertically polarized light to enter the wearer’s eyes. Glare is removed as the horizontally polarized light wave can not go around the polarized filter.

Polarized lenses or Polarized fishing glasses do not offer universal protection from glare, any how. If the wearer tilts his head past 45 degrees or so, some of the horizontal light could enter and as well cause some bright spots. Some wearers who use polarized safety glasses or polarized lenses in snowy area might find that they lose some contrast among snow and shadows. Fishermen and drivers appear to derive the most benefit from polarized lenses as they deal with most horizontally surfaces. A fisherman using polarized sunglasses could see below the surface of the water to look for schools of fish or out of sight obstacles. Drivers are no longer affected by a steady reflection of light from their lids or the road ahead

There are as well some restricted to use of polarized lenses, any how. As vertical polarizing stripes decrease the amount of light coming on to the eye, polarized lenses should be used for regular eyewear with clear lenses. Prescription sunglasses could be tinted a extremely light gray to lodge in the polarized cover, but most contact lenses cannot. Some driver states that polarized lenses could result in distortions liquid crystal displays (LCD).

Both horizontally and vertically polarized lenses are usually used to look at the three-dimensional movies. Some of the light reflected from the movie screen is vertically polarized that simply means only a lens with a same vertical laminate would receive it. The other lens only gets horizontal light waves. Your brain takes both of these images and combines them to make a realistic sense of depth.

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