Spectroscopic apparatus and methods
US5689333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | May 10, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample placed under a microscope is illuminated by light from a laser beam. Raman scattered light is passed back via a dichroic filter to various optical components which analyse the Raman spectrum, and thence to a CCD detector. The optical components for analysing the Raman spectrum include tunable dielectric filters in a filter wheel; a Fabry-Perot etalon; and a diffraction grating. These various components may be swapped into the optical path as desired, for example using movable mirrors, enabling the apparatus to be used very flexibly for a variety of different analysis procedures. Various novel analysis methods are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.