One minute understanding of polarizers
Polarized light can be divided into three types: linear polarized light, elliptical polarized light and circular polarized light. Generally, the so-called polarized light refers to linear polarized light, also known as plane polarized light. The vibration of this kind of light wave is fixed in a specific direction, the propagation path in space is a sine curve, and the projection on the plane of vertical propagation direction is a straight line.
Principle: when the polarizing filter lens is filtered, it is filtered by the shutter structure of black crystal, and the remaining useful vertical light enters into the eyes, so as to block the reflected light, and feel comfortable and clear.
Usually, sunlight shines in all directions. When it hits an object, the light will reflect back to form two kinds of light, horizontal and vertical. Horizontal light will cause dazzled random reflection light. Polarized glasses can filter these reflected light. In fact, it is composed of seven layers of thin sheets.
Polarized light filter layer is made according to the polarization principle of light. Its material is composed of vertical molecules (the principle of louver), which can filter the dazzling reflected light and scattered light, and make the disordered light into parallel light into the eyes, thus having the function of eliminating glare, more effectively weakening the strong light and making the field of vision clearer.
There are too many light sources in life that will produce harmful light, especially sunlight. The light emitted from sunlight includes visible light, infrared light and ultraviolet light.
Polarizing sunglasses have the function of polarizing light, so they can block all harmful light without affecting the transmission of visible light, and can really achieve the function of eye protection.
Generally speaking, polarizers play the role of blinds, blocking the strong light so that people can see the object more clearly. You can wear polarizers in your daily life, whether it's sailing, outdoor activities or driving out at night.
In the summer with dazzling sunshine and frequent thunderstorms, remember to put a pair of polarized sunglasses in the car.
Polarized lenses are universally recognized as suitable for driving. When light is emitted from the surface of an object, it is partially polarized to produce glare. The reverse effect of glare: to enhance brightness and reduce color saturation; to blur the outline of the object and make the eyes tired and uncomfortable. The polarizer is made according to the polarization principle of light. It has the special function of effectively eliminating glare, filtering the disordered light, improving the driver's vision and increasing the driving pleasure.
The polarizing lenses are also classified, and the optical level is the highest level of the solar lenses. It requires that the "sphericity" and astigmatism of the lenses be "0". It also requires that the flat curvature conform to the European standard CE. The polarizing lenses can ensure that people who drive for a long time can maintain the best visual sense.
Classification of Polarized Sunglasses
Polarized sunglasses can be divided into:
Ski goggles
Fishing glasses
Polarized driving mirror
Outdoor sports mirror
Golf glasses
Because polarizers can block harmful light 100%, outdoor activities, such as skiing, fishing, water activities, etc., can completely block harmful light sunglasses to avoid glasses injury or fatigue.
How to distinguish polarized sunglasses?
1. A mobile phone with liquid crystal display, through the polarized sun lens to observe the liquid crystal screen, and rotate the screen at the same time, the liquid crystal screen seen will turn black with the rotation of the polarized sun lens, which is caused by the polarized sun lens filtering the light in the scattering direction from the screen.
2. In outdoor, the role of polarizers is obvious, which can be used to distinguish polarizing sunglasses from ordinary sunglasses.
Polarizing mirror test card, through the polarizing sunglasses, you can see the figure that the naked eye can't see.
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