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:
Nov. 13, 2018
Filed:
Aug. 25, 2017
Topcon Corporation, Itabashi-ku, Tokyo, JP;
Masashi Nakajima, Tokyo, JP;
TOPCON CORPORATION, Itabashi-Ku, Tokyo, JP;
Abstract
An ophthalmic apparatus and method is provided for quickly and accurately aligning a measurement optical system with the vertex of the cornea of a subject's eye. The ophthalmic apparatus comprises a main body, an infrared detection system, a support portion, a driving unit, a visible light irradiation system placed coaxially with the apparatus main body and configured to irradiate the subject's eye, at least two photographing devices configured to substantially simultaneously photograph the subject's eye from different directions, a first alignment detection unit configured to acquire Purkinje images of the subject's eye, originating from infrared light, from at least two photographed images of the subject's eye and detect a position of the subject's eye from the Purkinje images, a second alignment detection unit, and a drive control unit to align the apparatus with the subject's eye.