A polarizing mirror is an additional lens that can eliminate or partially eliminate polarized light. Usually according to the working principle, a polarizer points for a linear polarizer (PL) and circular polarizer (CPL), the simplest method of identifying is to a polarizer is close to the eyes, non metal scene reflective, rotating polarizer to a certain point of observation and reflection will be weakened or even disappeared; the polarizer to do the same experiment, PL will see the same results, and CPL were used to observe the scene is basic did not change. On the daily use of view, the use of polarized lenses, or a lot of opportunities, especially in the shooting scenery, the feeling is more obvious, but it can also be used as UV, so more popular.

The use of polarizing mirror is more widely used in photography for the following points:

A, can eliminate or weaken the smooth object surface reflection;

Two, can make the sky dark;

Three, can be two pieces of overlapping instead of the gray filter;

Four, can improve the saturation of color image.

Clothing and glass in the window of the reflection of the glass together, it is difficult to see the color and style of clothing (see figure A), coupled with linear polarization mirror (PL), the reflection of the part was weakened (see figure B).