Apparatus and method for measuring spectrum image data of eyeground
US7850305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2005 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Oct 13, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14555
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The object of the invention is to provide a favorable spectral characteristic that reduces variation depending on the frequency of received light intensity, and that is gentle on a subject eye. It also eliminates displacement between positions of respective spectral images of the same part even if a change in alignment occurs between the eye and apparatus with the lapse of time. An apparatus 1 for measuring spectral fundus image data of this invention comprises: an illumination optical system 10 having an illumination light source 11 that emits a light beam in a specified wavelength range; a light receiving optical system 20 for forming a fundus image on the light receiving surface of a photographing section 4; a liquid crystal wavelength tunable filter 32 capable of choosing a wavelength of a transmitted light beam in a specified wavelength range; a spectral characteristic correction filter 13 having wavelength characteristic for correcting the wavelength characteristic of the emitted light intensity of the illumination light source 11 and the transmission wavelength characteristic of the wavelength tunable filter 32 so that the received light intensity on the light receiving surf…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.