Rotating beam ocular identification apparatus and method
US4393366A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Feb 17, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1171
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a method and apparatus for acquiring and recording an identification pattern from the reflectance of the fundus of an eye, a single light source is operable to produce a substantially columnar source beam of infrared light directed into the fixated eye from a plurality of sequential, angularly divergent positions. The light is focused on the retina and reflected in part out of the eye. Variations in the ocular structure contribute to various reflected intensities. The intensity of the reflected light is detected, measured and recorded for each sequential angularly divergent position forming a unique and repeatable identification pattern, or "signature" for each individual.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.