Scanning laser ophthalmoscope
US5430509A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Mar 10, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/1025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A laser beam emitted by a laser light source is scanned in a series of small, high-speed oscillations in a first scanning direction by an acousto-optical deflector, and scanned at a lower frequency in a second direction perpendicular to the first scanning direction by a vibration mirror galvanometer, and scanned at yet a lower frequency in a third direction, parallel to the first direction, by a mirror galvanometer in order to enable high-precision scanning, and is projected onto a prescribed region of an eye. Light reflected by the eye passes, via the mirror galvanometers and, through a confocal optical aperture and is converted to an electrical signal by a photosensor. The signal is then converted by a signal processor to a standard television line format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.