Metallic mold for optical element and optical element

Details Metallic mold for optical element and optical element Metallic mold for optical element and optical element

2005-04-04

2009-02-10

Gupta, Yogendra (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Shaping or casting surface

C106S038270, C249S114100

Reexamination Certificate

active

07488170

ABSTRACT:
A molding die for forming an optical element, comprises a base body; a film layer formed on the base body and having a thickness of 0.01 to 500 μm; and a 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. The film layer is formed by an amorphous alloy having a supercooled liquid state 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 and the transferring surface maintains the surface roughness after the transferring surface is heated to a temperature which is higher 50° C. higher than the glass transition temperature (Tg) of the optical element formed by the transferring surface and lower than the glass transition temperature of the amorphous alloy.

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