Ophthalmologic viewing apparatus
US5914771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/156
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ophthalmologic viewing apparatus 1 has a viewing system 23 for viewing the forward eye sections (5, 7, 9) and has an illuminating system 13. The illuminating beam of the illuminating system 13 impinges from the outside on the cornea 5. The viewing apparatus 1 has a light absorber 25 for suppressing the virtual image of the illuminating light source 17, namely, the so-called corneal reflection. The light absorber 25 is in the region of the optical axis 11 of the illuminating system 13 and has dimensions which are small compared to the transverse dimensions of the illuminating beam. The virtual image is formed by the reflection at the convex surface of the cornea 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.