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: Robin Myers <email@hidden>
- Date: Thu, 7 Apr 2005 15:09:15 -0700
On 7 Apr, 2005, at 15:00, Roger Breton wrote:
I was stumped today by a printer I visited. On their Spectroscan they
have
the D65 filter mounted on the head in permanence? They told whoever
sold
them the Spectroscan told them to leave that D65 filter on at all
times,
because it would make better profiles.
I’m clueless as to the usefulness of this filter for "general" output
profiling work.
Would anyone see any reasons for such a measuring practice?
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
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