| Melles Griot HeNe Laser Tube (Unknown P/N) | |
| Written by AnubisTTP on 2008-12-22 |
|
This is an example of an older low power 'hard seal' helium neon laser tube. Unlike early 'soft seal' helium-neon lasers, this tube has its mirrors permanently fused to the glass envelope, which prevents the helium from escaping over time. A hard seal tube can be expected to hold its gas for several decades, as opposed to the one- to three-year lifespan of the average soft seal tube. The exact power output of this unit is unknown, but is probably at or below 1mW.
Melles Griot HeNe Laser Tube (Unknown P/N)
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