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:
Feb. 12, 2008
Filed:
Jan. 17, 2003
Keiji Tsunetomo, Osaka, JP;
Takahiro Hashimoto, Osaka, JP;
Hideshi Nagata, Osaka, JP;
Shigeo Kittaka, Osaka, JP;
Kenjiro Hamanaka, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Takahiro Hashimoto, Osaka, JP;
Hideshi Nagata, Osaka, JP;
Shigeo Kittaka, Osaka, JP;
Kenjiro Hamanaka, Osaka, JP;
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A method for producing an aspherical structure according to the invention includes the steps of: forming a layer on a surface of a substrate so that the layer exhibits an etching rate distribution in a direction perpendicular to the surface of the substrate; forming a mask having a predetermined opening shape on the surface of the layer; and etching the layer to thereby form at least one aspherical concave portion. When each concave portion is used as a molding tool so that a resin with which the concave portion is filled is solidified and removed from the concave portions an aspherical lens array can be formed accurately.