Method and device for optically determining the position of an object
US8193498B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2007 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Oct 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94108
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and a device for optically determining the position of an object in a particular area of a substantially plane surface. According to the invention at least one directional single-point emitter associated with at least two directional single-point light receivers covering the particular area are disposed near said particular area, each light emitter and receiver having an axis substantially parallel to the particular area and on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the receivers intersect the axis of the emitter at different points. The light emitter is energized and the position of the object on the axis of the emitter is determined as a function of a comparison of the light signals reflected and diffused by the object toward each of the two light receivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.