Device and method for optical measurement of a target
US9772228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Oct 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and a method for optical measurement of a target, wherein the target is irradiated with radiation beam (15) and a measurement beam (27) is received from the target and detected. Commonly used absorbance, reflectance and fluorescence measurements do not provide adequate information in e.g. measuring small contents of sulphur compounds. The present solution provides a new Raman spectrometer which is suitable for mass applications. A target is activated with pulses of a laser diode (12). The Raman signatures are measured and integrated successively with a point detector (44). A Fabry-Perot interferometer (42) on the measurement path is successively controlled into corresponding pass bands. While high spectral resolution or range is not required it is possible to use small-sized and low cost components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.