Title:
角膜形状解析器
Document Type and Number:
Japanese Patent JP2013525060
Kind Code:
A
Abstract:
This invention describes a corneal topographer with a light source to project a pattern light on the cornea, imaging optics for collecting the reflection from the cornea and projecting it on to a photo-sensor, an optical mask to modulate the light beam such that focusing error of the corneal image results in displacement of its spatial spectrum relative to a reference spectrum. Defocus maps, depth-maps and a corneal topogram can be constructed by measuring and processing the spectral displacement corresponding different sub-regions of the cornea. The cornea topographer is compact and inexpensive. The corneal topograph can be used in refractive eye surgery and in contact lens fitting.
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Inventors:
Simonov, Alexei Nikolawig
Ronbach, Mitchell Christian
Ronbach, Mitchell Christian
Application Number:
JP2013509015A
Publication Date:
June 20, 2013
Filing Date:
May 02, 2011
Export Citation:
Assignee:
AKKOLENS INTERNATIONAL B.V.
International Classes:
A61B3/10
Domestic Patent References:
| JPH05509015A | 1993-12-16 | |||
| JP2004097619A | 2004-04-02 | |||
| JP2012514749A | 2012-06-28 | |||
| JPH08510949A | 1996-11-19 | |||
| JPS6185919A | 1986-05-01 | |||
| JP2011080875A | 2011-04-21 |
Foreign References:
| US20020140902A1 | 2002-10-03 |
Attorney, Agent or Firm:
Masago Onishi