Retroreflective optical system and methods
US10598592B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2019 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Feb 20, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/558
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A retroreflective optical system for creating a passive optical tag in an absence of electrical power, involving: a retroreflector having a surface and a retroreflective element disposed in relation to the surface, the retroreflective element configured to: passively impart a unique signature in relation to incoming light by using at least one of spectral filtration and color filtration, whereby a plasmonic response is effectible; and reflect outgoing light having the unique signature; and an optical device having an input aperture, the optical device disposed at a distance from the retroreflector and configured to transmit the incoming light and the outgoing light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.