Re: Detecting polarization axis
- From: "redbelly" <redbelly98@xxxxxxxxx>
- Date: 15 Jun 2006 15:53:13 -0700
Marco wrote:
Hi all,
My problem:
I have to find the orientation of the linear polarization axis of some
circular-shape glasses
My solution:
use a white led and a linear polarizer with the investigated glass.
Place all the elements in this order: led -> fixed-polarizer ->
investigated-glass -> light detector. My idea is to make the
investigated glass spin until the detector sees some light from the led
passing through the system, when it sees nothing on its side I know
that the polarization axis of the investigated glass is 90 degrees with
respect to the fixed polarizer and I'm done
Your opinions:
are welcome. I'm looking for comments and suggestions on different
approaches or assembly I can find on the market.
That's basically the right approach. You may use any convenient light
source, of course. And the detector won't see zero light, but there
will be a minimum amount of light when the polarizations are at 90
degrees.
Mark
.
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- Detecting polarization axis
- From: Marco
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