Liconix HeCd-Laser
akt...@web.de
I have bought a used HeCd-Laser that I want to get to run. (Liconix
4210). The supplier told me, that it was off for 6 month.
I never had a HeCd-laser, and so plugged it in, the plasma ignitetd and
primary I was happy - But it didn't lasered. So I tryed cleaning and
alligning the end mirrors, looked for the spectra and recognized during
the last week. That the plasma in the cappilary got white-blue, while
standing yellow at the side of the OC. (The colors are approx RGB:
#87D1FF and RGB: # F7E34D)
What color should the plasma have? How can I improve the plasma. There
are three pots at a plantine in the interior. Does anybody know, which
one will controle the tempreture of the helium, cadmium and what the
last poti is for?
Sam Goldwasser
How much time did you give it to warm up?
DO NOT touch any internal pots without a service manual. Some things
like He pressure are irreversible if you go too high.
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akt...@web.de
mirrors, etc..
STEVE ROBERTS
akt...@web.de wrote:
> I gave it at least two hours of warming up, befor i started adjusting
> mirrors, etc..
Call or email tech support at Melles Griot Carlsbad office (see the
melles main web site) They usually are pretty good about information on
the older liconix products, as to what you should see on the test
points, if the psu has them brought out to the user
Steve Roberts
arthur...@hotmail.com
Hi,
I also recently purchased 2 Liconix HeCd lasers that I'm trying to
fire-up. The first: The tube partially lights up. The larger part of
the tube that probably contains the helium does not. This part of the
tube has a dark silvery ring close to the center. Would that mean the
tube is dead?
On the second: there is a ticking sound as the power is turned on and
the tube does not light up. Someone had inserted a piece of carboard
becide the tube which prevents a spark from jumping between the glass
tube.
I have never owned a hecd before as well so I thought I should ask in
case anyone has some advice.
akt...@web.de
this one only flashes up, if you let not cool the system long enough
down, before you restart it. The discharge should be only in the
cappilary, where the mirrors are.
LaserLover
being distributed along the lasing cavity.The Cadmium metal starts in a
reservoir, where heaters warm it to the point where part of the metal
turns to gaseous state and contributes to the lasing action . When the
laser is cycled through many on-off work sessions, the Cadmium metal
cools at various points within the cavity so that eventually the
reservoir is depleted and metal deposits interfere with lasing within
the bore.
Same thing happens with other metal lasers. Once the reservoir is
depleted the tube has to be replaced.
It might be possible to rework the tube but pretty toxic for any
glassblower !
Rick
Sam Goldwasser
It also may be possible to heat the tube where the cadmium is to convince
it to go back where it belongs. :)