Light curtain device
US6354716B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light curtain device for creating a curtain of light between a reflective first location and a second location is disclosed. The device includes a light source adapted to provide a light column, a plurality of beam splitters, a plurality of light detectors, and an indicator arranged to indicate the interruption of the light column. The beam splitters are disposed to intersect the light column at intervals, and each of the beam splitters is adapted to direct a deflected portion of the light column toward the first location. The reflective first location receives the deflected portion of the light column from each of the beam splitters and reflects each deflected portion toward the second location. The light detectors are disposed adjacent the second location, with each of the light detectors being operatively associated with a corresponding one of the beam splitters and being positioned to the receive its corresponding deflected portion reflected by the reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.