Integrated optical module for reflectance sensing
US7617980B2 · kind B2 · utility
11Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2005 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Feb 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10732
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Reflection of light from a surface is sensed by emitting light from a light emitting diode and focusing the light using an aspherical emitter lens to illuminate a reflecting surface. Light reflected by the reflecting surface is focused onto a photodetector using an aspherical collector lens. The light emitting diode is displaced from the optical axis of the aspherical emitter lens and the photodetector is displaced from the optical axis of the aspherical collector lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.