Eye characteristic measuring apparatus
US6629761B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2000 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Nov 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an eye characteristic measuring apparatus provided with an image forming condition changing unit for achieving an appropriate illuminating condition and capable of setting an optimum illuminating condition and an optimum light receiving condition. A first light source emits light, a first illuminating optical system illuminates a small region of the retina of the eye with the light emitted by the first illuminating optical system in a variable illuminating condition, a first photodetecting optical system guides part of reflected light reflected from the retina of the eye through a first transforming device that divides the reflected light into at least seventeen light beams to a first photodetecting device, an arithmetic unit determines the optical characteristic of the eye on the basis of a first signal provided by the first photodetecting device and corresponding to the inclination of light, and an image forming condition changing unit changes the respectively image forming conditions of the first illuminating optical system and the first photodetecting optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.