Date: Fri Oct 23 12:06:00 2009
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Author: George Herold
Subject: Re: 1/4 wave plates, retardation value?
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.
From: email@example.com [mailto:firstname.lastname@example.org] On
Behalf Of email@example.com
Sent: Friday, October 23, 2009 10:03 AM
Subject: Re: [tap-l] 1/4 wave plates, retardation value?
That makes sense.
Quoting "Thomas J. Bauer" :
> 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.
> firstname.lastname@example.org 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
From email@example.com Fri Oct 23 12:06:00 2009