Devices and methods for optical power sensing scanning laser projectors
US9798149B1 · kind B1 · utility
3Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Jun 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Devices and methods are described herein to measure optical power in scanning laser projectors. In general, the devices and methods utilize a filter component and photodiode to measure optical power being generated by at least one laser light source, with the filter component configured to at least partially compensate for the non-uniform electric current response of the photodiode. Such a configuration facilitates accurate optical power measurement using only one photodiode, and thus can facilitate accurate optical power measurement in a relatively compact device and with relatively low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.