Edmund Optics' TechSpec high-contrast plastic linear polarizers feature a good extinction ratio and high transmission of unpolarized light from 400 to 700 nm. They improve contrast by reducing glare, rendering them suitable for applications such as edge detection, and they can be used with cameras employing small-aperture lenses. When unpolarized light enters a linear polarizer, light polarized perpendicular to the polarization axis is absorbed, while light parallel to the polarization axis is transmitted. The plastic linear polarizers use a proprietary stretched polyvinyl alcohol (PVA) film to create the polarization axis. For increased protection and durability, the PVA film is laminated between two plastic plates. The polarizers are available, unmounted, in 12.5- to 300-mm diameters.
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