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:
Oct. 30, 2012
Filed:
Dec. 19, 2007
Shuji Seki, Ibaraki, JP;
Hideki Komiya, Ibaraki, JP;
Susumu Shibasaki, Ibaraki, JP;
Makoto Aihara, Ibaraki, JP;
Masashi Yoshimura, Ibaraki, JP;
Shuji Seki, Ibaraki, JP;
Hideki Komiya, Ibaraki, JP;
Susumu Shibasaki, Ibaraki, JP;
Makoto Aihara, Ibaraki, JP;
Masashi Yoshimura, Ibaraki, JP;
Hitachi Maxell, Ltd, Ibaraki-Shi, Osaka, JP;
Abstract
A method of producing an optical element, in which a first and a second die are cooperated with each other so as to press-mold a material in order to produce an optical element including a lens portion, the first die has a circular cross-sectional shape, and the second die defines therein an interior space having a polygonal cross-sectional shape with respect to the direction of die-fastening, the first die is adapted to enter into the interior space of the second die in the direction of die-fastening in the interior space so to press-mold the material in order to form the lens surface while the material is bulged out through gaps between the first die and the second die around the lens surface whereby forming protrusions. An optical element and a mold assembly for an optical element are also provided.