Date: Fri Oct 23 12:06:00 2009 ** **Back to Contents ** ------------------------------------------------------------------------ **

Author: George Herold

Subject: Re: 1/4 wave plates, retardation value?

Post:

Yup and the circular polarizer is a composite piece of optics, it's got
the linear polarizer and 1/4 waveplate stuck together. In the past you
could buy large sheets of this to reduce glare on the computer screens.


George H.

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of cbettis@unlserve.unl.edu
Sent: Friday, October 23, 2009 10:03 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] 1/4 wave plates, retardation value?

Thanks Tom,

That makes sense.

Cliff

Quoting "Thomas J. Bauer" :

> Cliff,
> That is the retarder difference in path length between the two axis.
> So it would be a half-wave plate for 400 nm light and a quarter wave
> plate for 800nm light.
>
> Tom
>
>
> tap-l@lists.ncsu.edu writes:
>> In looking around here for wave plate stuff, I found an envelope
>> labelled "circular polarizers" and in the envelope was a sheet
>> manufactured by Polaroid that had the label "RETARDER, retardation
>> value 200 +/- 20 nm". Do any of you know the definition of
>> "retardation value"? I have googled and found clues but no actual
>> definition.
>>
>> Cliff
>
>
>





From tap-l-owner@lists.ncsu.edu Fri Oct 23 12:06:00 2009
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