I rotated BS to align the arrows with the beam propagation direction. 

BS Font face

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Birefringence Measurements\Beam Splitter Calibration\20241006\front_refl\Tue, Oct 8, 2024 5-18-51 PM.txt

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Birefringence Measurements\Beam Splitter Calibration\20241006\front_trans\Tue, Oct 8, 2024 6-59-48 PM.txt

The large birefringence(23 deg) in reflection was confusing. So, alignment was improved more. Redid measurement in reflection of BS front face. 

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Birefringence Measurements\Beam Splitter Calibration\20241009\front_refl\Wed, Oct 9, 2024 10-26-57 PM.txt

I mounted mirror(BB1EO3 sample 1) in the transmission of the BS front face. The mirror is aligned to obtain reflection at optimal position. Then I flipped BS. This was to ensure that in case the BS moved, I can understand that its from BS flipping and not mirror misalignment. After flipping BS, the beam maintained its position after reflection from coating. We don't care about the reflection from the back face of the BS anymore. 

Polarization states generated with BS back face transmission:

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Polarization states\20241010\Thu, Oct 10, 2024 4-20-30 PM.txt

In the reflection of the mirror, after BS:

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\Birefringence Measurements\Coating measurement\BB1-E03\20241010\Thu, Oct 10, 2024 5-40-42 PM.txt

Also, the measurement takes only 1 hour. Maybe it improved sometime from labview modifications. I never noted the time of measurements after the 1st labview was made, which was taking rather 2 hrs.