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 i-Zone Polaroid i-Zone The Polaroid i-Zone was a type of instant film camera manufactured by the Polaroid Corporation starting in 1999. This camera took pictures 1.5"x1", that came on a pull-out strip of paper. The strip was decorated and could later be cut to the size of the photo when the image was finished developing. Special film that had a sticky back for mounting the prints was also available. The camera was mostly marketed at children with its simple functionality, low-cost, and oblong shape. Unusually, the shutter was not mounted behind the lens, but rather perpendicular to the lens, hovering just