The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1995
Filed:
Jul. 21, 1993
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; C23C / ;
U.S. Cl.
CPC ...
427282 ; 20429811 ;
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.