Date: Mon, 14 Feb 2011 09:55:54

Author: Rueckner, Wolf

Subject: Re: Jello Gradient Index lens modeling the SOFAR sound channel

Post:

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Maybe the following would work. Make a gradient index like ours (you gave =
the link below) using gelatin instead of plain water. Make a second one. =
Pop the two out of their molds and sandwich them together with their high-c=
oncentration sugar sides touching. -- Wolfgang




On Feb 13, 2011, at 8:37 PM, Paul Doherty wrote:

Hi Tap ers

The Exploratorium Explainers are working with NOAA and want to build an opt=
ical model of the undersea sound channel.

I want to build a jello based gradient index (GRIN) optical pathway that wi=
ll trap a laser beam.

I showed them the one where I layer water (doped with milk) over corn syrup=
(doped with milk) and leave it for a day to allow a gradient to form. But =
they want the gradient at both sides of a channel not just at the top.

like this

http://www.fas.harvard.edu/~scidemos/LightOptics/BouncingLightBeam/Bouncing=
LightBeam.html

I found this site on line but the gradient looks a bit too gentle.

http://www.maximizingprogress.org/2010/11/fiber-optic-jello-cooking-up-grin=
-lens.html

Anyone have ideas about or experience making a stronger gradient?

Or do I just make a very long tube of GRIN jello.

Paul D


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http://www.fas.harvard.edu/~scidemos/LightOptics=
/BouncingLightBeam/BouncingLightBeam.htmlI found this site on l=
ine but the gradient looks a bit too gentle.=
http://www.maximizingprogress.org/2010/11/fiber-optic-jello-cooking-up-grin=
-lens.htmlAnyone have ideas about or experience making a strong=
er gradient?Or do I just make a very long tube of GRIN jello.Paul D=

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From tap-l-owner@lists.ncsu.edu Mon Feb 14 10:06:08 2011