How Circular Polarizer Film Works

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How Circular Polarizers Work

Improved viewing and contrast is achieved through the CPF cancelling out bright ambient light that is reflected off the surface of the display. The CPF achieves this effect through its multilayer construction. Bright unpolarized ambient light passes through the linear polarizer layer, thus turning into horizontal oriented light. As this light passes through the quarter wave layer, it becomes circularly polarized, spinning into the display surface. As the light is reflected off the surface of the display it is now spinning in the opposite direction. This reverse spinning light becomes linearly polarized again but its orientation is now 90 degrees different than the transmission axis of the linear polarizer. Because of its orientation the linear polarizer absorbs this reflected light, and cancels it out so it is not observed by the view.

Circular Polarizer Film Configurations

 

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