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RE: Fresnel lenses again
- To: bmansur <bmansur@oc.edu>, David <David@InterWorld.com>, hous0042 <hous0042@maroon.tc.umn.edu>, jim <jim@bogie2.bio.purdue.edu>, KellySt <KellySt@aol.com>, kgstar <kgstar@most.magec.com>, lparker <lparker@destin.gulfnet.com>, rddesign <rddesign@wolfenet.com>, stevev <stevev@efn.org>, "T.L.G.vanderLinden" <T.L.G.vanderLinden@student.utwente.nl>
- To: zkulpa <zkulpa@zmit1.ippt.gov.pl>
- Subject: RE: Fresnel lenses again
- From: Brian Mansur <bmansur@oc.edu>
- Date: Fri, 08 Mar 96 13:54:00 PST
- Encoding: 22 TEXT
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From: T.L.G.vanderLinden
To: KellySt; kgstar; stevev; jim; zkulpa; hous0042; rddesign; David;
lparker; bmansur
Subject: Fresnel lenses again
Date: Friday, March 08, 1996 4:32PM
Brian
>Tim
>Another problem that we haven't thought of when using mirrors or lenses is
>that they absorb some of the energy of the beam, this changes the density
of
>the lens/mirror. The result is that unwanted bumps arise and that the
>focus-distance changes.
Brian
Density change? Why would the lense/mirror, have a change in density. Or
are you talking about changing the density that the design calls for? Why
would there be bumps?