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- Newsgroups: sci.electronics
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!cs.ucf.edu!news
- From: clarke@acme.ucf.edu (Thomas Clarke)
- Subject: Re: Old laser rejuvenation
- Message-ID: <1992Aug26.194917.734@cs.ucf.edu>
- Sender: news@cs.ucf.edu (News system)
- Organization: University of Central Florida
- References: <massoud.57@chemteca.sdsu.edu>
- Date: Wed, 26 Aug 1992 19:49:17 GMT
- Lines: 26
-
- In article <massoud.57@chemteca.sdsu.edu> massoud@chemteca.sdsu.edu (Massoud
- Ajami) writes:
- > In article <1992Aug26.043710.27944@vpnet.chi.il.us> cgordon@vpnet.chi.il.us
- (gordon hlavenka) writes:
- >
- >
- > >I have an _ancient_ laser which almost works. It's a HeNe laser,
- > >model 3100 from Gaertner Scientific (circa 1969). It worked for a
- > >while, but now has developed an electrical problem.
- >
- >
- > You have lost the gas. You woudln't expect helium gas stays in the
- > tube forever?
- >
- About five or six years ago I saw a little article in Applied Optics
- about rejuvenating olf HeNe tubes by putting the tube in a chamber
- with pressurized(?) He for a day or so. The He would migrate back
- into the tube and after a while the tube worked just like new.
- Probably wouldn't want to overshoot though. Can pressurize it in
- fairly quickly, but would have to wait years for too much to
- diffuse out again !-)
- --
- Thomas Clarke
- Institute for Simulation and Training, University of Central FL
- 12424 Research Parkway, Suite 300, Orlando, FL 32826
- (407)658-5030, FAX: (407)658-5059, clarke@acme.ucf.edu
-