Near field optical probe for simultaneous phase and enhanced amplitude contrast in reflection mode using path matched differential interferometry and method of making it
US5990474A · kind A · utility
9Cited by
22References
16Claims
0Family size
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/862
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A probe includes first and second single-mode optical fibers with a semi-reflecting mirror between them. The second optical fiber is tapered by heating and pulling. The semi-reflecting mirror, the tapered portion, and the sample form a Fabry-Perot cavity. The probe can be used in a system having a differential interferometer which provides the appropriate path difference with a mirror on a piezoelectric transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.