Public Lab Research note

And if I flip it over? Effects of a reversed polfilter on spectra.

by viechdokter | April 21, 2016 17:11 | 38 views | 0 comments | #13011 | 38 views | 0 comments | #13011 21 Apr 17:11

So, now for something interesting... I repeated the polfilter turning angle test - but this time with the polarizing filter flipped over. The first experiments I did with the polarizing filter put on top of the spectrometer the way you would screw it onto a camera. Now I put it on "backward" - with some interesting results!

Here are the curves:





As you can see, there are differences that are not explained with noise effects. However you define the 0° angle, the curves for 0° and 180° (in the plot blue and yellow) are different from the curves for 90° and 270° (in the plot red and green).

You can see it in all channels, although again, there is a lot more noise in the blue channel.

Here are the CSV's:


Login to comment.

Public Lab is open for anyone and will always be free. By signing up you'll join a diverse group of community researchers and tap into a lot of grassroots expertise.

Sign up