Lighting device and imaging device comprising such a lighting device
US12348886B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2021 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jun 10, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4286
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lighting device comprising a lighting module including an optical output configured to emit a light beam having an angular spread. The module has a light source configured to generate the light beam and an optical diffuser arranged to receive and diffuse the beam towards the optical output, such that the downstream value is greater than the upstream value of the angular spread. A control module emits a control signal having an alarm value when the value of the angular spread of the light beam emitted by the optical output passes below a first threshold, the control module comprising a photoreceptor optically coupled to the optical output and configured to measure a light intensity. The control module outputs the control signal having the alarm value when the value of the light intensity falls below a second threshold. A control circuit deactivates the light source upon reception of the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.