Title:
OPHTHALMOLOGIC APPARATUS
Document Type and Number:
Japanese Patent JP2019055122
Kind Code:
A
Abstract:
To provide an ophthalmologic apparatus having a wider alignable range to allow the measurement of cornea geometries with high precision.SOLUTION: The ophthalmologic apparatus includes: two or more imaging units for imaging the anterior eye part of a subject eye substantially at the same time from different directions; and an optical member in which are formed a diffuse-transmission part for a predetermined pattern and two or more transparent parts through which the optical path of the two or more imaging units passes. The ophthalmologic apparatus further includes: a projection unit for projecting, onto the anterior eye part, measurement pattern light obtained by light from a light source disposed to the rear side of the optical member diffuse-transmitting through the diffuse-transmission part; a cornea geometry information acquisition unit for acquiring cornea geometry information of the subject eye based on an image of the anterior eye part onto which the measurement pattern light is projected by the projection unit; and a movement amount determination unit for determining the amount of movement of the projection unit based on two or more projection images captured by the two or more imaging units. An entrance pupil for each of the two or more imaging units is arranged in or near the corresponding transparent unit.SELECTED DRAWING: Figure 1
Inventors:
NAKAJIMA MASASHI
Application Number:
JP2017182514A
Publication Date:
April 11, 2019
Filing Date:
September 22, 2017
Export Citation:
Assignee:
TOPCON CORP
International Classes:
A61B3/107
Domestic Patent References:
| JP2007000382A | 2007-01-11 | |||
| JP2013248376A | 2013-12-12 | |||
| JPH0265836A | 1990-03-06 | |||
| JPH0690906A | 1994-04-05 | |||
| JP2007144113A | 2007-06-14 |
Attorney, Agent or Firm:
Enami Tomokazu