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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: "Colorimeter"
Date: Sun, 18 May 2025 13:37:23 +0100
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On 18/05/2025 03:29, Don Y wrote:
> On 5/17/2025 2:03 PM, Martin Brown wrote:

>> If you are serious about doing this right then a 2D CCD sensor and a 
>> prism hires grating combo at right angles will allow you to quantify 
>> the entire visible spectrum at ultra high resolution. Be careful 
>> though Perkin-Elmer (and others) have some very good lock out patents 
>> on this trick (may be about to expire).
> 
> Again, not looking to make an "instrument".  The phone idea may work
> if the CCDs don't freak out with high intensity sources.

CCDs are almost indestructible unless you point them at the sun. Even 
then they handle it much better than a human eye. Webcams are probably a 
lot cheaper though. If you find one of the paint firm's colour matching 
apps and test chart it may already do what you want or close enough.

-- 
Martin Brown