Datacolor User to User Support Group.

While we are on the subject, I was playing with my spectro just taking 
random measurements of materials, and noticed that the screen patch is 
noticeably darker than the material. .... like plastic, fabric...ect

Randy Laskody

Tom wrote:

>--- In colorvision_group@yahoogroups.com, MGochnauer <goch@...> wrote:
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>>How sensitive is the reader to ambient light falling on the target?  
>>The instructions say nothing, one way or the other.
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>Here's are some simple tests.  Lift your 1005 off the paper and point
>it tword the middle of your room.  Take a reading.  Unless you have a
>brightly lit room it almost always reads black or very close to it (at
>least mine does).  Second take a reading and then deliberately try to
>shine your light along the side of the paper under the nose.  Now no
>cheating and lifting it off the paper!  That would cause the
>illumination from the LEDs to decrease and isn't realistic ... though
>the light show is kind of cool.  Mine doesn't change.  
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>Consider that the shroud on the colorimeter does a pretty good job of
>shading the paper, that the LEDs are fairly bright, and any ambient
>illumination on the target is at approximately 90 degrees from the
>surface of the paper.  
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>You could probably calculate the contribution due to ambient light but
>odds are its below the noise level.
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>The ColorVision folks could of course give you a much more technical
>answer ;-)
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