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Tuesday, June 11, 2013

Extended Wavelength Range

Traditional color measuring devices like the Color Touch™ measure from 400 to 700 nm. Some other color measuring devices measure lower than 400 nm and higher than 700 nm.  When doing normal color calculations of L*a*b* this extra data doesn't change the resulting data because the weighting factors from ASTM E308 are so small.

I have two questions:

What wavelength range do online color measuring devices measure?

If data is available below 400 nm and above 700 nm, is this data used for anything in particular?

Let me know...

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