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. 29, 2014
Filed:
Nov. 30, 2010
Yoshifumi Takasu, Osaka, JP;
Naomi Kishimoto, Osaka, JP;
Yuta Moriyama, Osaka, JP;
Tooru Furushige, Osaka, JP;
Yoshifumi Takasu, Osaka, JP;
Naomi Kishimoto, Osaka, JP;
Yuta Moriyama, Osaka, JP;
Tooru Furushige, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A pressing mold for optical lenses, which molds a ring-zone-type diffraction lens having a plurality of concentric ring zones, the mold including: diffraction action transfer surfaces configured to form diffraction action surfaces that diffract light passing through the diffraction lens; and step transfer surfaces configured to form step surfaces that connect the adjacent diffraction action surfaces of the diffraction lens, wherein surface roughness of the step transfer surfaces is larger than surface roughness of the diffraction action transfer surfaces.