I rotated the sample. Although its on non rotatble mount, I took a picture of the back surface for a reference of Sample 2 BB1EO3, before and after rotation.

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Coating measurement\BB1-EO3 Sample2\20240619\Wed, Jun 19, 2024 6-42-43 PM.txt