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01-01-2009 | Original Article

Time-resolved measurement shows a spectral distribution shift in an intense pulsed light system

Authors: Ewan Eadie, Paul Miller, Teresa Goodman, Harry Moseley

Published in: Lasers in Medical Science | Issue 1/2009

Abstract

For an intense pulsed light (IPL) device, knowledge of the spectral output is useful in order to provide effective treatment and target specific structures in the skin. It is also a requirement in order to perform a safety assessment. A novel spectral measurement system has been developed to detect the optical radiation output of intense pulsed light devices. The system has a time resolution of 450 μs and a wavelength resolution of 0.6 nm. This enabled us to observe spectral changes, both within a pulse and between pulses, in a pulse train. The output from a free discharge IPL source and four different treatment handpieces was measured. A shift in the spectral distribution between pulses, and within a pulse, was discovered. The spectral shift is more prominent for higher radiant exposures.

Radiant exposure is defined as energy incident upon a surface for a specified time. The IPL industry has incorrectly replaced this term with the word “fluence”. Therefore the word “fluence” will be used only when we are referring to settings on the actual IPL device, not to the measured output of radiation, as the term “radiant exposure” is more appropriate.

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Title: Time-resolved measurement shows a spectral distribution shift in an intense pulsed light system
Authors: Ewan Eadie
Paul Miller
Teresa Goodman
Harry Moseley
Publication date: 01-01-2009
Publisher: Springer-Verlag
Published in: Lasers in Medical Science / Issue 1/2009
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-007-0517-z

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Time-resolved measurement shows a spectral distribution shift in an intense pulsed light system

Abstract

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