title: A time resolved intense pulsed light spectral analysis system.
abstract: Intense pulsed light systems are currently in widespread use in clinical applications. Verification of spectral content and associated pulse waveforms is, however, not featured in product support and calibration. A measurement system was developed to determine the spectral output of such sources within a series of discrete wavelength intervals. Such a system utilised a series of 11 broadband optical filters with centre wavelengths within the range 450-950 nm in circuit with silicon photodiodes as optical detectors. Signals were captured using a low cost 8-channel 16-bit universal serial bus data capture module interfaced to a laptop computer. This allowed the pulse profile of selected filter components to be separately captured and analysed. Calibration of individual filter channels was undertaken using a Bentham dmc150 spectroradiometer and reference tungsten light source. Initial measurements undertaken of the intense pulsed light output of a Lumenis One system using the system are described.
authors.affiliation: Department of Clinical Physics and Bioengineering, Arden Cancer Centre, Walsgrave Hospital, Coventry, CV2 2DX, UK. Douglas.clarkson@uhcw.nhs.uk
authors.forename: D M
authors.initials: DM
authors.lastname: Clarkson
authors.forename: D
authors.initials: D
authors.lastname: Gill
authors.forename: M
authors.initials: M
authors.lastname: Odeke
mesh_terms: D002138:Calibration; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation; D055095:Optics and Photonics / Q000295:instrumentation*; D010789:Phototherapy / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis / Q000295:instrumentation*