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Originally Posted by Blastyman
Its says its barely visible to the Naked eye though??????
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It depends on what wave length the IR is. 800-850 nm is barley visible as a faint red glow. 900 nm on the other hand is not visible to the naked eye.
Remeber IR can cause damage to the eye, relative to the output power and the proximity to the source. So if you make a IR laser sight treat it like a visible laser safety wise.