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:
Feb. 07, 2017
Filed:
Oct. 19, 2011
Applicant:
Kenzaburo Suzuki, Yokohama, JP;
Inventor:
Kenzaburo Suzuki, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01); G02B 27/01 (2006.01);
U.S. Cl.
CPC ...
G02B 5/18 (2013.01); G02B 5/1814 (2013.01); G02B 27/01 (2013.01);
Abstract
This optical system () comprises a prism () and a diffractive optical element (). The prism () has a non-rotationally-symmetric aspheric surface for correcting eccentric aberration, and the diffractive optical element () includes a diffractive optical surface (DM) having a lattice structure that is as about an optical axis (Ax) of the optical system (). The following condition is satisfied where ΔNe represents the refractive index difference of the diffractive optical surface (DM) in relation to the e-line (546.074 nm).0.53>Δ>0.005  (1)