BARRINGTON, N.J., March 14, 2012 — Edmund Optics has introduced its TechSpec high-contrast plastic linear polarizers, which it says are more durable than polarizing film
The devices feature a good extinction ratio and high transmission of unpolarized light from 400 to 700 nm. They improve contrast by reducing glare, and eliminating glare is critical in imaging applications where high contrast is essential, including edge detection and when used with cameras employing small-aperture lenses. They are suited for a variety of imaging applications.
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 high durability, the PVA film is laminated between two plastic plates.
The polarizers are available, unmounted, in a wide range of sizes, from 12.5- up to 300-mm diameters, from 50 × 50 up to 300 × 300 mm as well as 500 × 600 and 900 × 600 mm.
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