What is the principle of polarizer？
What is a polarizer？
Polarizer is a lens made according to the principle of the polarization of light, which is used to eliminate and filter the scattered light in the beam of light, so that the light can be put into the visual image of the eye on the right track through the optical axis, so that the field of vision is clear and natural.Used mostly for sunglasses and camera lenses.
Second, the principle of polarizer
Polarizers filter reflected light and increase image contrast.It works by selectively filtering light from one direction or another.This reduces the intensity of light in the sky by filtering out much of the polarized light in the diffuse reflection, darkening the sky and increasing the contrast between blue sky and white clouds.When shooting, you should look at the viewfinder and rotate the front mirror. The effect is most obvious when the sky is darkest in the viewfinder. The difference between the darkest and the most visible is 90 degrees.You can turn to any Angle between darkest and brightest as desired.
Polariscope also can effectively weaken or eliminate non-metallic surface reflections, the reflected light is typical of polarized light, the metal surface reflected light is not polarized light, polarized lenses for it doesn't work), by adjusting the polarizer can filter out the part of the reflective, thus improve the subject quality of the object, and to increase the sharpness of the picture.
Three, polarized sunglasses purchase skills
Sunglasses are not only needed in the summer, they are actually required all year round.Wear it on a sunny day and even on a cloudy day.Do not think that the sun is not strong cloudy days, the weather is not hot, it will take it lightly, imperceptibly but more harmful ultraviolet radiation.
1. Quality is the first consideration
The primary function of polarized sunglasses is to prevent UV rays and filter polarized light. A good polarized sunglasses lens can block more than 90% of the penetration of UV rays.You can choose polarized sunglasses with a "UV400" best UV blocking logo;Sunglass of inferior polarized light, for instance brunet sunglass, as the light that enters human eye darkens, the pupil of human eye can become big, the ultraviolet ray that enters an eye increases, increase harm to the eye.
2.See things real and natural
The color selection of polarized sun lens should be based on the principle that the color of the surrounding environment is not distorted, the edge of the object is clear, and the signal lights of different colors can be effectively recognized.When serving as driving sunglasses especially, ensure driving safety.The color of the lens is gray, brown and green, because the lens of these colors can absorb infrared ray and ultraviolet ray better, can improve the visual contrast and clarity, especially in the case of serious air pollution or fog wearing effect.
3.long-term wear will not be uncomfortable
Genuine polarized sunglasses should be comfortable to wear;The inferior lens has no technology and function at all when it is manufactured, and the lens material is also very poor. If you feel discomfort, dizziness, headache, dry eyes, tingling and so on after wearing the lens, you should stop using it immediately.
4.look at the protection function of the frame
Most polarized sports sunglasses are designed with curved veneers, which can effectively prevent eye irritation from wind and foreign objects in outdoor sports.In addition, the hardness of the polarizing lens and the flexibility of the frame material, are considered to be harmful to the human body.
Thank you for your watching
Mike Optical Company
Cayla
Email:017@mikeeyewear.com
Date:4,17,2021
