I did a series of measurements while changing the polarization angle by 90 degrees.

I did not recorded the required max/min of s and p polarizations to have accurate calibrations of the measurements.

So today I restarted measurements with incident p pol, s pol and started a 30 degrees polarization angle measurement.

However, there was another WIndows update... As it is not possible (yet?) to fully control the 2 lockin amplifiers from remote, I can not restart the measurement for today.

Furthermore, the HWP2 controller is not recognized by the software after acting strangely in the past days (only jog by 1 degree otherwise it resets the current angle to 0 and still move by 1 degree...)

For the new measurement a possibility could be to start by an absorption measurement before switching to birefringences ones.

This would assure 100 % that the orientation of the sample during all measurements is the same.