眼屈折力測定装置
- 专利权人:
- 株式会社ニデック
- 发明人:
- 磯貝 直己,羽根渕 昌明
- 申请号：
- JP2010179983
- 公开号：
- JP5064541B2
- 申请日:
- 2010.08.11
- 申请国别(地区):
- JP
- 年份:
- 2012
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide an eye refracting power measuring apparatus by which a precise measuring result can be obtained.
SOLUTION: The eye refracting power measuring apparatus includes: a measurement optical system 10 including a projection optical system having a measurement light source 11 with a small-sized light source and high directivity and projecting a spot-like measurement luminous flux to the fundus of the eye from the center part of the pupil of the eye to be examined, and a light receiving optical system 10b to take out reflection light from the fundus of the eye from the peripheral part of the pupil by a light shielding portion having a ring-like aperture disposed on a conjugate position with the pupil to make a two-dimensional imaging element 22 receive a ring image a luminous flux deflecting member disposed at a position deviated from the conjugate position with the pupil on the light path of the measurement optical system rotation means to rotate the luminous flux deflecting member around the measurement light axis of the measurement optical system to eccentrically rotate the measurement luminous flux on the pupil of the eye to be examined and calculation means to acquire eye refracting power of the eye to be examined on the basis of shape variation of the ring image received by the two-dimensional imaging element.
COPYRIGHT: (C)2011,JPO&INPIT
- 来源网站：
- 中国工程科技知识中心
