Linear Polarizers
Un-polarized light is a complex mixture of random wavefronts transverse to the line of travel. Linear polarizing filters selectively absorb light vibrations in certain planes. When light is passes though a linear polarizer its vibrations are confined to a single linear plane.

The linearly polarized light can then be used in application such as:

XP38 Linear Polarizer
This is a universal replacement material for Polaroid materials HN22, HN32, HN38, HN38s and HN42.

It is a very high efficiency polarizer for the visible spectrum 400 – 750 nm. Recommended for applications where a very high density in the crossed (extinction) position is as important as high transmittance in the open position.