Re: laser with 4 dot pattern

From: miso (miso_at_sushi.com)
Date: 06/14/04 

Date: 13 Jun 2004 22:15:59 -0700

I'm a bit baffled here as none of the responses address my 4-dot
problem, or google screwed up the thread. If google screwed it up,
perhaps someone can repost what was relevant to my 4-dot problem.

AES/newspost <siegman@stanford.edu> wrote in message news:<siegman-7E89C5.09570513062004@news.stanford.edu>...
> In article <6wvfhvocum.fsf@saul.cis.upenn.edu>,
> Sam Goldwasser <sam@saul.cis.upenn.edu> wrote:
>
> > If it runs without sputtering or flickering, the power supply is running
> > it OK, though the power supply may be overloaded and fail prematurely if
> > the voltage spec is too low.
>
> Sam, out of curiousity do modern He-Ne's still slowly lose helium by
> diffusion out of the glass envelope, or are better glasses now used?
>
> Putting a non-functioning He-Ne inside a plastic shirt bag and exposing
> it to He at 1 atm for a day or two used to be one of the fun ways of
> bringing an apparently dead tube back to life.

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