Invention Grant
- Patent Title: Ophthalmologic apparatus
-
Application No.: US16289679Application Date: 2019-03-01
-
Publication No.: US11497397B2Publication Date: 2022-11-15
- Inventor: Yoko Tatara , Michiko Nakanishi , Shunichi Morishima
- Applicant: TOPCON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TOPCON CORPORATION
- Current Assignee: TOPCON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Xsensus LLP
- Priority: JPJP2018-059894 20180327
- Main IPC: A61B3/103
- IPC: A61B3/103 ; A61B3/00 ; A61B3/10 ; A61B3/12 ; A61B3/14 ; A61B3/107

Abstract:
An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a corneal shape measurement optical system. The refractive power measurement optical system projects light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The inspection optical system includes an optical scanner. The inspection optical system deflects light from a light source, projects the light deflected by the optical scanner onto the subject's eye via the objective lens, and detects returning light from the subject's eye. The corneal shape measurement optical system projects an arc-like or circumferential measurement pattern from an outer edge side of the objective lens onto the subject's eye and detects returning light from a cornea of the subject's eye. When a working distance is WD, a distance from a corneal apex of the subject's eye to a pupil of the subject's eye is d1, a distance from the pupil to a fundus of the subject's eye is d2, and a scan range by the optical scanner is SA square, a diameter of the objective lens is greater than or equal to ((WD+d1)×SA/d2).
Public/Granted literature
- US20190298168A1 OPHTHALMOLOGIC APPARATUS Public/Granted day:2019-10-03
Information query