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Anyone know what causes that purple glow that you sometimes see with an argon laser, especially if you have the power turned down (like at the aperture and around the dot) and also you can sort of see it if you look into the laser head (like thru the fan) part of the tube will glow a little. You'll know what I mean if you have an argon laser.
Is this like a HeNe tube glowing red from the neon or a CO2 tube glowing pink due to the nitrogen in the gas mixture? What accounts for the purple (actually it is more of a bluish-purple) glow? Is this the argon gas itself, or something else?
Is this like a HeNe tube glowing red from the neon or a CO2 tube glowing pink due to the nitrogen in the gas mixture? What accounts for the purple (actually it is more of a bluish-purple) glow? Is this the argon gas itself, or something else?