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 (including the "Polaroid" name itself and non-bankrupt foreign subsidiaries) had been sold to Bank One's One Equity Partners (OEP). OEP Imaging Corporation then changed its name to Polaroid Holding Company (PHC). However, this new company operates using the name of its bankrupt predecessor, Polaroid Corporation. Significant criticism surrounded this "takeover" because the process left executives of the company with large bonuses, while stockholders, as well as current and retired employees, were left with nothing. The company announced a plan that gave the top 45 executives bonuses just for staying at their jobs. Meanwhile, other employees were restricted from selling their