Using integrating spheres as absorption cells: path-length distribution and application of Beer's law
| dc.contributor.author | Hodgkinson, Jane | - |
| dc.contributor.author | Masiyano, Dackson | - |
| dc.contributor.author | Tatam, Ralph P. | - |
| dc.date.accessioned | 2011-09-08T09:56:22Z | |
| dc.date.available | 2011-09-08T09:56:22Z | |
| dc.date.issued | 2009-01-01T00:00:00Z | - |
| dc.description.abstract | We have modeled the path-length distribution in an integrating sphere used as a multipass optical cell for absorption measurements. The measured radiant flux as a function of analyte concentration is nonlinear as a result, deviating from that expected for a single path length. We have developed a full numerical model and introduce a new analytical relationship that describes this behavior for high reflectivity spheres. We have tested both models by measuring the optical absorption of methane at 1651nm in a 50mm diameter sphere, with good agreement with experimental data in the absorption range 0-0.01cm -1 . Our results compare well with previous work on the temporal response of integrating spheres. | en_UK |
| dc.identifier.citation | Jane Hodgkinson, Dackson Masiyano, and Ralph P. Tatam. Using integrating spheres as absorption cells: path-length distribution and application of Beer's law. Applied Optics, Vol. 48, 2009, Issue 30, pp. 5748-5758 | - |
| dc.identifier.issn | 0003-6935 | - |
| dc.identifier.uri | http://dx.doi.org/10.1364/AO.48.005748 | - |
| dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/4298 | |
| dc.language.iso | en_UK | - |
| dc.publisher | Osa Optical Society of America | en_UK |
| dc.title | Using integrating spheres as absorption cells: path-length distribution and application of Beer's law | en_UK |
| dc.type | Article | - |