Patent ID: 7488170
Filing Date: 2009-02-10
Classification: B29D

Abstract:
1. A forming die for forming an optical element, comprising: a base body; a film layer formed on the base body and having a thickness of 0.01 to 500 mm; and a transferring surface for transferring and forming an optical surface of the optical element, the transferring surface formed on a surface of the film layer by a predetermined process and having a surface roughness Ra of 0.1 to 50 nm; wherein the film layer is formed by the deposition of a metallic glass containing 20 mol % or more of at least one atom of Pt, Ir, Au, Pd, Ru, Rh, Fe, Co, Ni, Zr, Al, Ti, Cu, W, Mo, Cr, B, and P on the base body and the metallic glass has a glass transition temperature, a crystallization temperature higher than the glass transition temperature and a characteristic that when the metallic glass is heated between the glass transition temperature and the crystallization temperature, the metallic glass becomes softened in a vitreous state, wherein when the transferring surface forms the optical element with a plastic material having a glass transition temperature of 200° C. to 250° C., the metallic glass has a glass transition temperature of 300° C. or more and is Pd