Enhancing emission of excited radiation in an analytical sample subjected to exciting radiation
US5317378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1991 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Feb 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/655
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spherical sample cell (FIG. 4A) bears an external inwardly specular laye defining a hollow imaging mirror 11D and an optical aperture 11E. The mirror acts as an integrator of both the exciting radiation for irradiating the sample and the resulting excited radiation to be analysed, the former entering and the latter exiting through the aperture 11E. Optical integration resulting from multiple internal reflections provides multifold increase in excited radiation compared with bare cells, which is of particular advantage in Raman spectrophotometry. Alternatively, the mirror may be provided in two complementary halves in a two-part cell-holder, in which case any conventional sample cell that fits within the mirror may be used. Spectrophotometers adapted for use with the sample cell or the cell holder as well as methods based on them are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.