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 at least 25% per year in the first decade of the 21st century. In 2009, Polaroid was acquired by PLR IP Holdings, LLC make which uses the Polaroid brand to market various products often relating to instant cameras. Among the products it markets are a Polaroid branded Fuji Instax instant camera, and various digital cameras and portable printers. , film continues to be made by the Polaroid Originals (previously the Impossible Project) for several models of Polaroid camera, and for the 8×10 inch format. Other brands such as Lomography, Leica, Fuji-Film, and etc. have innovated new models and features to