Dynamic optical tag
US7190907B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2004 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical tag, having a photo-detector, a controller, a piezoelectric translator, a battery and a retro-reflective tape. The photo-detector is responsive to an optical energy at a predetermined wavelength, and the controller is connected to the output of the photo-detector. The piezoelectric translator connected to controller is also connected to the battery when the photo-detector responds to the optical energy. The retro-reflective tape is directly mounted on the piezoelectric translator. When the connection between the piezoelectric translator and the battery is established, a pulse is generated and applied to the retro-reflective tape. Therefore, the optical energy incident on the retro-reflective tape is modulated by the pulse and retro-reflected by the retro-reflective tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.