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 printer producing prints. It uses the Zink ("zero ink") technology which is similar to dye sublimation but has the dye crystals embedded in the photo paper itself. Models CZA-10011B and CZA-20011B exist (which Polaroid claim to be identical). In 2009, the CZA-05300B PoGo, a 5 megapixel digital camera integrated with a Zink printer, was released. In 2011, the company released the Polaroid GL10 Instant Mobile Printer producing 3 by 4 inch prints. The printer, designed by Polaroid and Lady Gaga, allows people to print directly from a mobile phone or digital camera. This product is the first product in the