Proximity sensor including reference detector for stray radiation detection
US9535157B2 · kind B2 · utility
39Cited by
1References
19Claims
0Family size
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Key dates
| Filing date | Sep 23, 2014 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Feb 21, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/73265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor includes a radiation source configured to emit a primary radiation beam and a primary detector configured to pick up a reflected primary radiation beam. The radiation source is further configured to emit stray radiation. The sensor further includes a reference detector arranged to receive the stray radiation. The stray radiation may, for example, be emitted from either a side of the radiation source or a bottom of the radiation source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.