Biological detecting system and fingerprint collating system employing same
US5077803A · kind A · utility
109Cited by
3References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1989 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/37
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A biological detecting system comprising a light source; a condensing optical system for condensing a light beam from the light source and irradiating the surface of a sample to be detected with a spot of light, an imaging optical system for condensing light reflected or scattered by an irradiated portion of the sample and forming an image of the irradiated portion at a predetermined location, and a photodetector arranged at the predetermined location to detect the size of the image of the irradiated portion and output a detection signal indicating the detected size of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.