Optical sensor arrangement with optical barrier for passing light emitted by light emitting device and scattered on or above an outer surface of cover
US10190905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94108
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor arrangement comprises an optical barrier which is placed between a light-emitting device and a photodetector. Herein the light-emitting device and the photodetector are arranged on a first plane and are covered by a cover. The photodetector exhibits an active zone. The optical barrier exhibits an extent along a first principal axis, which is pointing parallel to the line connecting the centers of the light-emitting device and the photodetector. Herein the extent is greater than a dimension of the active zone. The optical barrier is designed to block light emitted by the light-emitting device that otherwise would be reflected by the cover by means of specular reflection and would reach the photodetector. The optical barrier is designed to pass light emitted by the light-emitting device and scattered on or above an outer surface of the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.