Method and apparatus for improved collection efficiency of speckle based navigation sensors using lightpipes and reflectors
US7041964B2 · kind B2 · utility
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1References
20Claims
0Family size
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Key dates
| Filing date | Jul 31, 2003 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F30/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Speckle based optical navigation is improved by increasing the collection efficiency of the photodetector through the introduction of a lightpipe or reflector technology. For example, the use of elliptical sidewalls and diffraction gratings in conjunction with a lightpipe leads to improvements in collection efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.