Optical sensor and method for suppressing faults by diffused light
US7579580B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Oct 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor (1) with a light beam (7) created by a pulsed primary light source (5), which light beam is reflected at a surface (13) of an object and is recognized by a detector. In order to mask interfering effects, which might develop due to diffused light of the light beam (7), a compensation light source (25) emits a light cone during station breaks in operation of the primary light source (5), which includes the diffused light range of the light beam (7) of the primary light source (5). In this way, objects within the diffused light area create a compensation light portion, which prevents the activation of the sensor output merely by the diffused light of the light beam (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.