Device for manufacturing a mould for use in the manufacture...

Metal deforming – Tool and/or tool holder

Reexamination Certificate

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Details

Other Related Categories

C029S03300H

Type

Reexamination Certificate

Status

active

Patent number

08069701

Description

ABSTRACT:
An optical element is manufactured by means of a mould by a replication technique including a mold that is manufactured from a ductile metal and is given a mold shape which corresponds to a pattern of sub-elements by means of a die having a die surface which corresponds to the optical sub-element and which is imprinted in the mold with a predetermined force in consecutive positions in accordance with the pattern. A workpiece holder fastened to the mold including a stepped chamber which is displaceable relative to the workpiece holder by a positioning device. The die surface imprints the sub-shape in the mold with a predetermined force substantially independent of a position occupied by the die during imprinting. The predetermined force plastically deforms the ductile metal exclusively at the area of the surface contact between the mold and the die.

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