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- Oct 18, 2013
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Re: Possible cheap 2-line 980nm/490nm pen
The one I got is 980 nm. Outside of GITD stuff I can definitely see a faint blue dot coming from it if I let my eyes adjust to darkness.
Weird that IR causes fluorescence when its on the opposite end of the spectrum from UV.
The one I got is 980 nm. Outside of GITD stuff I can definitely see a faint blue dot coming from it if I let my eyes adjust to darkness.
Weird that IR causes fluorescence when its on the opposite end of the spectrum from UV.