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 Z340 Polaroid Z340 The Polaroid Z340 is a digital camera that includes a system that can print a photograph on special paper in 45 seconds. It was introduced on November 8, 2011. It is a 14-megapixel digital camera that has a Zink printing system. The camera's printer does not use an ink cartridge. Instead, according to PC World, "cyan, yellow and magenta crystals inside the Zink printing paper are clear until heated by the photo process to create the images." The camera includes basic photo editing software, and can add a variety of decorative borders to the prints. The Z340 has