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The physics of polarized sunglasses

by:Fuqian     2020-04-12
The effect of polarized sunglasses is to filter the reflected light, increase the image contrast. Its working principle is selective filtering of light from a particular direction. By filtering diffuse many of polarized light, and decreases the intensity of light in the sky, the sky dark, and increase the contrast between the blue sky and white clouds. Specific will look at the viewfinder and rotating mirror before, when the dark sky in the viewfinder effect is most obvious, the darkest and most at 90 degrees. You can according to need to go to any Angle between the darkest and brightest. Polarized sunglasses also can effectively weaken or eliminate non-metallic surface reflections, the reflected light is a typical application of polarized light ( The metal surface reflected light is not polarized light, polarized the doesn't work) , by adjusting the polarized sunglasses can filter out this part of the reflective, thus improve the subject quality of the object, and to increase the sharpness of the picture. For example, by using the polarized sunglasses, can reduce the surface reflective, thus clear shot to the fish in the water. While filming the scene, the light of the projection Angle in accordance with the pictures of the camera Angle to approach, and its biggest bending Angle between 30 ~ 40 degrees. When using can be slowly rotating filter before the group of the lens to adjust, makes every effort to minimize reflections on the surface of the scenery. In addition, polarized sunglasses can effectively improve the color saturation, to improve the contrast, this is because the polarized sunglasses can absorb the fog or dust in the atmosphere and light reflected from the direction of the various miscellaneous shoot the images to make more pure. In filming in the still life photography, such as flowers, for example, often using polarized sunglasses to take pictures of the colorful. In landscape photography, flowers photography and filming certain glance compare the intense scene is very useful. Polarized sunglasses to use when shooting landscapes, depiction of a cloud has excellent effect. Blue sky light refractive index than were white clouds scattering light. Using the polarized sunglasses can also make the color of the leaves is more saturated and eliminate the 'fog of low Angle shot city scenery.
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