Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!netnews.upenn.edu!pender!jliu
From: jliu@pender (.)
Newsgroups: sci.electronics
Subject: Re: LASER cutters
Summary: What happens when the laser beam is not cutting
Message-ID: <21050@netnews.upenn.edu>
Date: 28 Feb 90 19:36:14 GMT
References: <44900003@uxa.cso.uiuc.edu> <2232@rodan.acs.syr.edu> <532@sierra.stanford.edu>
Sender: news@netnews.upenn.edu
Reply-To: jliu@pender (.)
Distribution: sci.electronics
Organization: University of Pennsylvania
Lines: 15


>3. How would & what is the best way/method of containing the laser beam, after
>   it penatrates the material, OR if the beam is running & there isn't any
>   material to penatrate.

Well, assuming that a lens is used to focus the laser beam at one point, you 
could place a solar cell beyond the focal point of the lens to recirculate
the power pumped into the laser. Or, you can actually couple some of the beam
energy back into the laser. 

Just suggestions...

-------------------------------------------------------------------------
John C. Liu	Univ. of Pennsylvania    (Electrical Engineering Dept.)
-------------------------------------------------------------------------