Retro-reflectometer for measuring retro-reflectivity of objects in an outdoor environment
US12117395B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2022 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Sep 27, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0691
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus includes an optical emitter configured to emit a first optical signal along an optical path towards a target object in an outdoor environment. The apparatus includes an optical detector positioned collinearly with respect to the optical emitter. The optical detector is configured to detect a second optical signal that is retro-reflected from the target object. The apparatus includes a lock-in amplifier coupled to the optical detector. The lock-in amplifier is configured to generate, based on the first optical signal and the second optical signal, a signal indicative of a retro-reflectivity of the target object in the outdoor environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.