Date: Mon, 14 Feb 2011 08:27:27

Author: Paul Doherty

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

Post:


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Hi Wolfgang=20

I did notice that the site I quoted was from Harvard!

I'll try your suggestion and post the results here.

Thanks

Paul D





On Feb 14, 2011, at 6:55 AM, Rueckner, Wolf wrote:

> 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-concentration sugar sides touching. -- Wolfgang
>=20
>=20
>=20
>=20
> On Feb 13, 2011, at 8:37 PM, Paul Doherty wrote:
>=20
>> Hi Tap ers
>>=20
>> The Exploratorium Explainers are working with NOAA and want to build =
an optical model of the undersea sound channel.
>>=20
>> I want to build a jello based gradient index (GRIN) optical pathway =
that will trap a laser beam.
>>=20
>> 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.
>>=20
>> like this
>>=20
>> =
http://www.fas.harvard.edu/~scidemos/LightOptics/BouncingLightBeam/Bouncin=
gLightBeam.html
>>=20
>> I found this site on line but the gradient looks a bit too gentle.
>>=20
>> =
http://www.maximizingprogress.org/2010/11/fiber-optic-jello-cooking-up-gri=
n-lens.html
>>=20
>> Anyone have ideas about or experience making a stronger gradient?
>>=20
>> Or do I just make a very long tube of GRIN jello.
>>=20
>> Paul D
>=20


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http://www.fas.harvard.edu/~scidemos/LightOptics/=
BouncingLightBeam/BouncingLightBeam.htmlI 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.htmlAnyone 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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From tap-l-owner@lists.ncsu.edu Mon Feb 14 12:30:22 2011