after waiting about 1h to let the laser stabilized :
0deg
no sample : Mon, Sep 9, 2024 10-26-56 AM
sample : Mon, Sep 9, 2024 10-32-56 AM
Adding these maps we now have (0/30, 0/45,0/60,15/30,15/45,30/45) couples and effective retardation attached to this entry.