Abstract
A new type broadband near-infrared polarizer was developed for use with near-infrared lasers and light sources. This polarizer utilizes evaporated metal thin films which can be deposited on transparent optical materials to form a sheet type polarizer. Polarizing filters with extinction ratio greater than 100:1 across the spectral band from 780 nm to 1550 nm are available as catalog items with clear apertures of 15 mm, 25 mm, 35 mm. Custom designed broadband polarizers for this spectral band can be fabricated with extinction ratios approaching 10,000:1. The sheet type polarizer material has an acceptance field of +30° about the normal to the polarizer surface.
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