A producing method of an optical element such as quarter-wave plate wherein preparing a first member which has a coefficient of elasticity of 1-4 (GPa) at normal temperature, setting the temperature of a die having microscopic shape with high aspect ratio to be higher than the glass transition temperature...http://www.google.de/patents/US7466488?utm_source=gb-gplus-sharePatent US7466488 - Optical element producing method and optical element
