Re: Adventures with cheap proofing lights

[CDTobie@aol.com]

In a message dated 5/14/02 11:04:20 PM, pderocco@ix.netcom.com writes:

>Okay, so what's the actual difference between a colorimeter and a
>spectrophotometer--or for that matter, a spectrometer? And as to the
>densitometer, am I right in assuming that that's a monochrome device that
>ignores color?

Well, thats close enough... and will do for a densitometer or even a 
luminancemeter as well, from our viewpoint. The two that matter for color 
management are sepctros and colorimeters. Spectros split light into discreet 
bands with a difraction grating, and meaure the amount of light in each band 
with sensors. Colorimeters filter light with a series of filters, and measure 
the results with sensors. So more data manipulation is necessary with a 
colorimeter... and fewer bands are used. They can be cheaper,smaller, and 
more rugged however; so if they suit a given task, then colorimeters may be 
more desirable for those reasons.

C. David Tobie
Design Cooperative
CDTobie@designcoop.com
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