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:
Dec. 07, 2021
Filed:
Feb. 25, 2020
Fujifilm Corporation, Tokyo, JP;
Tomoyuki Baba, Saitama, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An objective lens for an endoscope consists of a negative front group, an aperture stop, and a positive rear group that are arranged in this order from an object side. The front group includes only a negative first lens as a lens. The rear group includes only four lenses that consist of a positive second lens, a positive third lens, a fourth lens, and a fifth lens arranged in this order from the object side, as lenses. The fourth lens and the fifth lens have refractive power having signs different from each other and are cemented to each other. Conditional expression determined in advance about the focal lengths of the second lens and the rear group is satisfied.