Polaroid (polarizer) Polaroid (polarizer) Polaroid is a type of synthetic plastic sheet which is used as a polarizer or polarizing filter. A trademark of the Polaroid Corporation, the term has since entered common use. The original material, patented in 1929 and further developed in 1932 by Edwin H. Land, consists of many microscopic crystals of iodoquinine sulphate (herapathite) embedded in a transparent nitrocellulose polymer film. The needle-like crystals are aligned during manufacture of the film by stretching or by applying electric or magnetic fields. With the crystals aligned, the sheet is dichroic: it tends to absorb light which is polarized parallel to
Polaroid Corporation cameras, followed in 2011 with the release of much improved color films for Polaroid 600, SX-70 and Spectra Cameras. Polaroid had originally announced a new camera, styled after older models to coincide with the new films, but this was due before Christmas 2010—a deadline which passed with no new information on this new camera. On April 28, 2012, the documentary "Time Zero: The Last Year of Polaroid Film", directed by Grant Hamilton, was released in the U.S. It covers the rise, fall, and grass-roots revival of Polaroid's instant film technology. In summer 2008 Polaroid released the PoGo, an instant photo