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
Instant camera camera invention was brought to market in 1948, a few different instant cameras were developed, some using Polaroid-compatible film such as cameras by Keystone, Konica, and Minolta. Others were incompatible with Polaroid cameras and film, the most notable of these being made by Kodak, such as the EK series and Kodamatic cameras. Later, Fujifilm introduced instant cameras and film in selected markets. After taking over an old Polaroid factory in 2008, the Netherlands-based Impossible Project began producing instant film for Polaroid cameras. This helped generate new interest in instant photography. Kodak's EK and Kodamatic series cameras accepted a Kodak developed