Re: Any use for the D65 filter on the Spectrolino?
Re: Any use for the D65 filter on the Spectrolino?
- Subject: Re: Any use for the D65 filter on the Spectrolino?
- From: Roger Breton <email@hidden>
- Date: Thu, 07 Apr 2005 19:53:23 -0400
> The D65 filter shapes the spectrum of the tungsten halogen illumination
> in the SpectroScan to be close to the D65 spectrum. This increases the
> amount of blue in illumination. This will improve the signal to noise
> ratio in the green/blue/violet region of the spectrum. Additionally, it
> does a better job of activating fluorescent whitening agents in the
> paper, if you are into measuring such things.
>
> I use the D65 filter on most of my measurements because it does a
> better job of simulating real world lighting than tungsten halogen.
>
> Robin Myers
Are you saying that the D65 filter absolutely increases the light output in
shorter wavelengths? Or does it not simply attenuate the light energy in
longer wavelength by partially absorbing light from, say, 580 to 750 nm,
like the Solux 4700K lamp does?
Thank's for your help!
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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