After installing cameras the actual calibration are :

NF_Refl: acA1920-40gm
    pixel size (real): 5.86um
    Magnification = [0.53,0.56]
    pixel size (image): 3.22um
    image donne on input plan mirror M1 (accuracy about few mm)

NF_Trans: acA1920-40gm
    pixel size (real): 5.86um
    Magnification = 1.32
    pixel size (image): 7.73um
    image donne on output plan mirror M2 (accuracy about few mm)
 

need to adjust the NF transmission as the Magnification is greater than 1.