Using integrating spheres as absorption cells: path-length distribution and
application of Beer's law

Hodgkinson, Jane; Masiyano, Dackson; Tatam, Ralph P.

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.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.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.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	-