Optical unit
US10344935B2 · kind B2 · utility
0Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Jan 18, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical unit includes a rotary reflector configured to form a light distribution pattern by reflecting light emitted from a light source and scanning the reflected light, a motor as a rotation drive unit configured to rotate the rotary reflector, a magnet attached to a predetermined reference portion of the rotary reflector, and a Hall element configured to generate a position detection signal indicating a timing at which the magnet passes through a predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.