On the fluorescence from integrating spheres
Applied Optics, Vol. 47, Issue 21, pp. 3962-3967 (2008)
http://dx.doi.org/10.1364/AO.47.003962
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Abstract
Our recent study of the performance of integrating spheres shows prominent UV induced fluorescence features that are associated with contamination of the diffusing wall material by hydrocarbons. Because of multiple reflections of the radiation inside the integrating sphere, fluorescence is induced multiple times with each reflection of the incident radiation by the wall. Here, we report a simple theory on the fluorescence of integrating spheres developed from first principles. The results indicate a strong dependence of fluorescence on the reflectance of the diffusing material at both the excitation and fluorescence wavelengths as well as the geometry of the integrating sphere. Because of multiple reflection of the exciting radiation, a gain of more than an order of magnitude in fluorescence is possible compared with direct and single irradiation of a flat piece of the diffusing/fluorescing material. Applications of such fluorescence analysis for integrating spheres are discussed.
© 2008 Optical Society of America
OCIS Codes
(120.3150) Instrumentation, measurement, and metrology : Integrating spheres
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: March 6, 2008
Revised Manuscript: May 23, 2008
Manuscript Accepted: June 9, 2008
Published: July 18, 2008
Citation
Ping-Shine Shaw and Zhigang Li, "On the fluorescence from integrating spheres," Appl. Opt. 47, 3962-3967 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-21-3962
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