Optical device for the contactless measurement of distance of a light source
US6392755B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns an optical device for the contactless measurement of the distance of a light source (4) comprising optical detecting means (7) consisting of elementary sensors and further comprising: a set of N imaging means (SP1, SP2, SP3), N≧3, that enable image acquisition of the light source on a plane in the proximity of the detecting means thereby forming with said means a set of hot spots, each spot spreading over at least two elementary sensors; a circuit for computing, on the basis of the relative positions of at least three hot spots, at least one characteristic parameter of the distance from the light source whereof the accuracy depends on N number of hot spots. The measuring device is characterized in that it is designed for industrial measurements (of dimensions, texture, position, vibrations, displacement).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.