Date: Fri Oct 23 14:40:41 2009 ** **Back to Contents ** ------------------------------------------------------------------------ **

Author: cbettis@unlserve.unl.edu** **Received: from wm-imp-2.unl.edu (wm-imp-2.unl.edu [129.93.2.91]) by uni00ml.unity.ncsu.edu (8.13.7/8.13.8/Nv5.2008.0610.1) with ESMTP id n9NG5s7O029990 for ; Fri, 23 Oct 2009 12:05:54 -0400 Received: from localhost (localhost [127.0.0.1]) by wm-imp-2.unl.edu (8.13.1/8.13.1) with ESMTP id n9NG5su6023023 for ; Fri, 23 Oct 2009 11:05:54 -0500 Received: from lecturdemo.unl.edu (lecturdemo.unl.edu [129.93.36.196]) by wm-imp-2.unl.edu (Horde MIME library) with HTTP; Fri, 23 Oct 2009 11:05:53 -0500 Message-ID:

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

Post:

Gerge,

I salvaged a couple of those from old monitors.

Cliff

Quoting George Herold :

> 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 14:40:41 2009
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