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. 27, 2020
Filed:
Sep. 14, 2018
Applicant:
Nanchang O-film Optical-electronic Tech Co., Ltd., Nanchang, CN;
Inventors:
Masaru Amano, Saitama, JP;
Masao Mori, Saitama, JP;
Taro Asami, Saitama, JP;
Kazuyoshi Okada, Saitama, JP;
Assignee:
NANCHANG O-FILM OPTICAL-ELECTRONIC TECH CO., LTD., Nanchang, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01); G02B 9/64 (2006.01);
U.S. Cl.
CPC ...
G02B 9/64 (2013.01); G02B 27/0037 (2013.01); G02B 27/0062 (2013.01);
Abstract
The imaging lens includes at least one positive lens that satisfies predetermined conditional expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. In a case where a lens that satisfies a conditional expression (4) meaning a low dispersion material is included, the lens that satisfies the conditional expression (4) satisfies a predetermined conditional expression (5).