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:
Mar. 15, 2016
Filed:
Dec. 11, 2012
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Reona Ushigome, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01); G02B 27/42 (2006.01);
U.S. Cl.
CPC ...
G02B 5/18 (2013.01); G02B 5/1814 (2013.01); G02B 5/1866 (2013.01); G02B 27/4211 (2013.01); G02B 27/4272 (2013.01);
Abstract
A diffractive optical element made by adhering a first diffractive grating and a second diffractive grating to each other, each of which has a blazed structure. At least one of the first and second diffractive gratings is made of a material having a refractive index distribution in a plane normal direction, and the predetermined expressions are satisfied for a wavelength λ in a visible wavelength range.
Ushigome, Reona. (2016). Diffractive optical element, optical system, and optical apparatus (U.S. Patent No. 9285518). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9285518
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile