Method and system for optical detection of nano-objects in a light refracting medium
US7889343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2005 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Nov 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1757
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and system for optical detection of nano-objects in a refracting medium. A nano-object (n_oi) and the refractive medium are illuminated (A) with a periodically amplitude modulated coherent electromagnetic heating wave (HB(Ω)), to generate a specified temperature and refractive index profile in the vicinity of the nano-object, and with a coherent electromagnetic probe wave (PB) to generate an emerging probe wave (EPB(Ω)) having at least one intensity component amplitude modulated by a beat at the modulation frequency of the coherent heating wave. The intensity component amplitude modulated by a beat is detected (C) in the emerging wave (EPB(Ω)), to distinguish and represent this nano-object in the refractive medium. The invention is useful in the detection of nano-objects in an industrial, physiological or intracellular medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.