Eye characteristic measuring apparatus
US6802609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | May 22, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/103
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention includes an eye characteristic measuring apparatus which achieves accurate measurement by taking a difference component with relation with measured data in a reference optical path when optical characteristics of an eye are measured. Specifically the measuring apparatus is provided with a reference optical system separate from a light receiving system. Measurement of eye characteristics can include both aberration of an eye and aberration in the measuring apparatus. In order to achieve high accuracy, the eye characteristic measuring apparatus of the invention substantially removes aberration in strain of the equipment produced after the initial stage and aberration of the equipment caused by deformation due to temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.