Re: Request for spectral data of light sources
Re: Request for spectral data of light sources
- Subject: Re: Request for spectral data of light sources
- From: Graeme Gill <email@hidden>
- Date: Tue, 16 Oct 2007 11:38:58 +1000
Roger Breton wrote:
I don't know it has a way to separate the fluorescent component from the
total reflectance. That would be kind of advanced, you know. Unless I miss
your point?
A Bi-Spectral instrument is what's needed to characterize Fluorescence.
It essentially sweeps a monochromatic light source across the sample
while analysing the reflected spectrum. For non fluorescent samples,
nothing interesting happens - you get back the illumination wavelength.
With fluorescent samples, wavelengths different from the illuminant
are excited. The result is a 2D characterization of a sample, one
axis for incoming wavelength, and the other axis for emitted wavelength.
With this information you can properly predict the behaviour of fluorescent
samples under any illumination.
Combining different colored LEDs with a diffraction grating sensor (for instance),
would give a limited form of the capability.
Graeme Gill.
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