Polaroid Eyewear Such glasses could screen out glare rather than simply darken the landscape. Land and Wheelwright contracted to begin production of Polaroid Day Glasses, a longtime source of revenue for Polaroid. With venture capital from railroad tycoon W. Averill Harriman and merchant banker and part-time songwriter James P. Warburg, Edwin Land, George Wheelwright, and Julius Silver incorporated Polaroid Corporation on September 13, 1937. Polaroid began the manufacturing of polarizing sheet for windows in railroad observation cars. In 1939 Day Glasses were the source of most of Polaroid's $35,000 profit. Although sales rose to $1 million in 1941, the company's 1940 losses
Polaroid (polarizer) component of the electric field perpendicular to the line of crystals however can cause only small movements in the electrons as they can't move very much from side to side. This means there will be little change in the perpendicular component of the field leading to transmission of the part of the light wave polarized perpendicular to the crystals only, hence allowing the material to be used as a light polarizer. This material, known as "J-sheet", was later replaced by the improved "H-sheet" Polaroid, invented in 1938 by Land. H-sheet is a polyvinyl alcohol (PVA) polymer impregnated with iodine. During