Continuous optical self-alignment for light curtains and optical presence sensors for simplification and maintenance of alignment
US7508512B1 · kind B1 · utility
10Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2006 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Feb 14, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods are disclosed that facilitate tolerating and/or correcting light beam misalignment in a light-emitting device, such as a light curtain. Attributes of the light beam can be assessed and compared to predetermined threshold values to evaluate whether the light beam is misaligned, and corrective feedback can be generated to adjust the position of one or more transmissive apertures generated on an LCD, through which light is permitted to pass, in order to re-align the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.