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:
Jun. 25, 2024
Filed:
Feb. 27, 2019
Nikon Vision Co., Ltd., Tokyo, JP;
Satoshi Fukumoto, Yokohama, JP;
NIKON VISION CO., LTD., Tokyo, JP;
Abstract
An objective optical system which forms an observation optical system consists of, in order from the object, a first lens group that has positive refractive power, a second lens group that has positive or negative refractive power, and a third lens group that has negative refractive power. Focusing is performed by moving the second lens group along an optical axis, the third lens group is configured to move in a direction that is perpendicular to the optical axis to correct image blur, and the following conditional expression is satisfied: 0.70≤f1/f12≤1.50, where f1 denotes a focal length of the first lens group, and f12 denotes a combined focal length of the first lens group and the second lens group.