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:
Aug. 12, 2025
Filed:
Apr. 24, 2020
Topcon Corporation, Tokyo, JP;
Yasufumi Fukuma, Tokyo, JP;
Zhenguo Wang, Ridgewood, NJ (US);
Zaixing Mao, Harrison, NJ (US);
Kazuhiro Oomori, Tokyo, JP;
Makoto Fujino, Tokyo, JP;
Topcon Corporation, Tokyo, JP;
Abstract
An ophthalmologic apparatus includes an objective lens that faces a subject's eye, an illumination optical system that irradiates a cornea of the subject's eye with illumination light through the objective lens, and a corneal measurement optical system including an interference image capturing camera that takes an image of a corneal reflection light. The corneal reflection light is a reflection of the illumination light reflected from the cornea, through the objective lens. A numerical aperture G of the illumination optical system is larger than a numerical aperture g of the corneal measurement optical system.