Light scanner having closed-loop control based on optical feedback
US12223103B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2023 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | May 10, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Systems and methods for monitoring the instantaneous position of a scanning element of a light scanner via an optical-feedback signal are disclosed, where the optical-feedback signal is a portion of a light signal being steered in a two-dimensional pattern by the light scanner. The optical-feedback signal is detected by a position monitor that provides a commensurate feedback signal. In some embodiments, the feedback signal is used to develop a transfer function for the light scanner via a calibration routine. In some embodiments, the feedback signal is used in a closed-loop driving scheme used to drive the light scanner. Embodiments in accordance with the present disclosure are particularly well suited for use in object tracking systems, such as eye trackers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.