Method of manufacturing a die for use in molding glass optical e

Details Method of manufacturing a die for use in molding glass optical e Method of manufacturing a die for use in molding glass optical e

1993-07-21

1995-04-11

Owens, Terry J.

Coating processes

Nonuniform coating

Mask or stencil utilized

20429811, B05D 132, C23C 1404

Patent

active

054056527

ABSTRACT:
A method of manufacturing glass optical elements such as gratings, microlenses, Fresnel lenses, optical disks with pregrooves, and the like includes heating a glass plate to a temperature higher than the softening point of the glass and then press-molding the glass using upper and lower dies. The upper die includes a base made of a hard metal and a work layer made of a noble metal alloy which has been sputtered on a press plane of the base through a mask. The mask has a fine aperture pattern such as a line and space pattern corresponding to the fine pattern of concavities and convexities which is to be formed at the surface of the glass optical element.

REFERENCES:
patent: 4842633 (1989-06-01), Kuribayashi et al.
patent: 5171348 (1992-12-01), Umetani et al.

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