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:
Jul. 08, 2003
Filed:
Apr. 17, 1998
Applicant:
Inventors:
Yuichiro Ori, Moriyama, JP;
Koji Miyai, Sakai, JP;
Hiromu Mukai, Kawachinagano, JP;
Shigeto Ohmori, Kawachinagano, JP;
Assignee:
Minolata Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/18 ;
U.S. Cl.
CPC ...
G02B 5/18 ;
Abstract
A diffractive optical element acts as a lens. The optical element has a diffraction grating. The diffractive grating is provided with a plurality of ridges. Each of the ridges has a transmissive surface. A sectional profile of the transmissive surface is composed of a plurality of successively connected strait lines of an identical length. The length varies from one ridge to another.
Ori, Yuichiro. (2003). Diffractive optical element and method of manufacturing a mold (U.S. Patent No. 6590709). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6590709
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