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 Pablo Montoya's #42 Chevy Impala in the NASCAR Sprint Cup Series and entries in the IRL Indy Car Series, including the car driven by Dario Franchitti. The Polaroid name has also been associated with the NOPI drift series. Polaroid was the principal sponsor of the Nissan 350Z driven by Nick Bollea in the 2007 season. On February 8, 2008, Polaroid (under the control of Thomas J. Petters of Petters Group Worldwide) announced that the company has decided to gradually cease production and withdraw from analog instant film products completely in 2008. Since March 2010, instant film materials for vintage Polaroid