Heterodyne detection device for imaging an object by re-injection
US8654340B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 3, 2008 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | May 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01Q60/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure relates to a detection device for imaging an object, that comprises: a laser cavity for transmitting an original light signal at an original wavelength towards the object in order to generate an evanescent wave at the surface of the object; a conversion means adapted for converting the evanescent wave into a progressive signal; a re-injection means adapted for injecting the progressive signal into the laser cavity in order to generate interference inside the laser cavity between the progressive signal and the original light signal; a detection means adapted for detecting the interference in order to determine the characteristics of the object; characterized in that the device includes a wavelength modification means adapted so that the wavelength of the progressive signal injected into the laser cavity is different from the original wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.