[Hugo, Marc, Shalika]

While trying to align the polarization camera on pci setup we found out that the power it measured was quite lower than expected.

We installed it on the translation stage to verify if the discrepancy was due to the beam size but whichever position gave similar result.

We also placed it on the LC beam that was used for birefringence compensation and Jones matrix measurement but still could see this discrepancy (we measure 75% of the real power).

This is true for vertical and horizontal linear polarization, elliptic, right/left circular polarization...

We are now discussing with Thorlabs support about this.