Optical coherence tomography have plural reference beams of differing modulations
US6198540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2290/35
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical measuring instrument which enables measurement of necessary data in a short period of time and uses a light with a short coherence length. In this instrument, such a light emitted from a light source is divided into a measurement light and a plurality of reference lights. The plurality of reference lights are processed by different frequency modulations, and then multiplexed with a light reflected from a measurement object irradiated by the measurement light. On the basis of an output of a photoelectric converter for detecting the level of the multiplexed light and the frequency of each reference light, optical characteristic data related to a plurality of measurement points are calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.