Phase error measurement for oscillating mirrors
US10365474B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Aug 15, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a mirror controller for an oscillating mirror. The mirror controller includes a processor configured to receive a mirror sense signal from the oscillating mirror and to determine a phase error between the mirror sense signal and a mirror drive signal. The processor determines the phase error by sampling the mirror sense signal at a first time, sampling the mirror sense signal at a second time at which the mirror sense signal is expected to be equal to the mirror sense signal as sampled at the first time, and generating the phase error as a function of a difference between the sample of the mirror sense signal at the second time and the sample of the mirror sense signal at the first time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.