Published on: Thu May 12 2011

I have a 632nm half wave plate, and I needed to find the optical axis.

The axis HWP is horizontally polarizing the light at an angle of around 45 degrees. Now to record the intensity over 40-50 degrees and find the exact position for horizontally polarized light.

***UPDATE***

After sitting in the dark and rotating the HWP from 40 - 50 degrees the minimum intensity value is at 40 degrees. (measured with voltmeter). Now to find the exact maximum position. I'm going to look near the 0 point.

***UPDATE 2***

One maximum is at exactly 2 degrees. The second is at 88 degrees.