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. 25, 2025
Filed:
Jul. 09, 2021
Tokyo Visionary Optics Co., Ltd., Tokyo, JP;
Takeshi Yokoyama, Tokyo, JP;
TOKYO VISIONARY OPTICS Co., Ltd., Tokyo, JP;
Abstract
Provided is an imaging lens unit that is able to suppress a reduction in optical performance even if plastic lenses absorb water. The imaging lens unit includes a lens barrel formed of a resin material and first to seventh plastic lenses housed in the lens barrel. Among the first to seventh plastic lenses, at least two adjacent plastic lenses have different water absorption rates and have conical fitting slopes that are centered on an optical axis, are formed outside optical effective portions of the adjacent plastic lenses, and are fittable to each other. The fitting slope of a high-water-absorption plastic lens that has a high water absorption rate is formed outside the fitting slope of a low-water-absorption plastic lens that has a low water absorption rate.