Optical three-dimensional coordinate sensor system and method thereof
US8513585B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Aug 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94112
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates an optical three-dimensional coordinate sensor system and method thereof. A plurality of light-emitting modules produce a plurality of light signals, and then a plurality of reflected light signals reflected by an object are received by a plurality of photodetectors. After receiving the reflected light signals, the photodetectors generate a plurality of photocurrents. A plurality of active pixel circuits receive the photocurrents and transform the photocurrents to a plurality of reflective optical voltages. A plurality of differential amplifier circuits (DAC) compare the reflective optical voltages and the background voltages, and then output a plurality of DAC output voltages of the reflected light signals. Afterward, a processing module detects the DAC output voltages and uses an algorithm to calculate the top three of the DAC output voltages to determine the three-dimensional coordinate of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.