Re: linear polarisation degradation by reflection
- From: "Helpful person" <rrllff@xxxxxxxxx>
- Date: 25 May 2006 13:05:47 -0700
yosi wrote:
Hi guys,
We created a linearly polarised parallel beam with polarisation ratio of
about 2000:1. After reflection from various flat dialectric beamsplitters
and even from a metallic beamsplitter the same beam polarisation ratio was
reduced to 200-300:1 polarisation ratio ( depending on the exact
component ).
Did anyone else observe this strange observation?
Does anyone has an idea why this can happen?
We would appreciate and help.
Joseph Yaeli
This is not strange but to be expected. Unless the plane of incidence
/ reflection is either exactly parallel or orthogonal to the plane of
polarization then you will get some change.
This is because the incident light can then be resolved into s and p
polarizations which will have slightly different reflectivities and
phases. This can either result in a rotation of the original
polarization or it being transformed into an elliptical form (highly
eccentric).
This is further complicated if your light is not collimated.
Please visit my web site at www.richardfisher.com
.
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