Guys, talking about spectro-readings: the (free) “Messure Tool” from the Profile Maker package gives you reflectance-readings in percent. Simply watch out for the 44nm band. If the reflectance is greater than 100 % there are OBs for sure.
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Are you sure about 44nm or rather 440?
The precision of the device is also going to show as differences ie; 2,5,10, or 20nm bands, and the associated sampling S/n.
I would suggest rather looking at peaks in the spectral info of the readings as OBA do have other spikes outside of 440.
But the simplest way , I'll repeat is to look with a blacklight.
