Date: Wed Oct 14 23:37:35 2009

Author: Bernard Cleyet

Subject: Re: 1/4 wave plates

Post:

At first I thought the plastic boxes were to make retarder plates Ha,
ha, ha, ha!

So searched for plastic and lo and behold you have a hugh supply of
them, or at least the office secty. has or did before throwing out
the OHPs.

Also some have used plastic food wrap, and even Feynman wrote that
commercial packaging cellophane is close to a half thickness for the
vis.


here's an excerpt: [well, the abstract]


We describe procedures for constructing inexpensive wave plates of
desired retardation out of ordinary
commercially available transparencies. Various relevant properties of
the transparencies are investi-
gated: the dependence of retardation on rotation of the film, tilt,
wavelength, position, and temperature.
A transparency is typically a multiple-order wave plate with the
difference of in-plane refractive indices
of 0.07 and a temperature dependence of retardation 0.02 radK.
Constructing wave plates out of
combinations of transparency sheets is also explored. 2007 Optical
Society of America
OCIS codes: 120.2130, 120.5410, 120.5710, 140.0140.


bc



On 2009, Oct 14, , at 12:52, cbettis@unlserve.unl.edu wrote:

> Dale,
>
> I found a dedicated little power supply for my vacuum station and
> have bought a bunch of plastic boxes from McMaster-Carr to store
> more stuff on it, as well as organize lots of other things around
> here. The plastic boxes go very well with my storage bins and allow
> a nice nested organizational arrangement (several demonstraions in
> one bin with individual ones in the plastic boxes). I was just
> making classroom usage plans for the new building for next summer:
> the University doesn't quite know how to register classroom space
> for a building that is not done yet. Anyone who has a some millions
> in loose change and wants to have a physics building named after
> them, get in touch with UN-L.
>
> I really like it when a faculty member wants to illuminate an upper
> division course with demonstration aws it sounds like is happening
> with your inquiries about the 1/4 wave plate. I find it personally
> very edifying and I learn a lot.
>
> Cliff

cut

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