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:
Jun. 14, 2022
Filed:
May. 31, 2019
Konica Minolta, Inc., Tokyo, JP;
Takehiko Goshima, Kunitachi, JP;
Yoshihiro Okumura, Toyohashi, JP;
Hiroshi Umetsu, Tachikawa, JP;
Seiji Yuasa, Tama, JP;
OTSUKA PHARMACEUTICAL CO., LTD, Tokyo, JP;
Abstract
To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical elementA having optical surfacesandand a non-optical surfaceA that is adjacent to the optical surfacevia a ridge by injection molding includes forming the non-optical surfaceA with a mold surface. The mold surface includes a sink forming areaas a first area having a first surface roughness, and a high transfer areaas a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.