PBS to Pellicle: 19cm
pellicle to lens: 9cm
lens focal = 120mm

~~~~~~~~~~~~~~~~~~
Into vacuumm beam

meas 1:
lens to nanoscan: 16cm

meas2: 
lens to nanoscan:20cm

meas3:
lens to nanoscan:18cm

meas4:
lens to nanoscan:14cm

meas5:
lens to nanoscan: 12cm

meas6:
lens to nanoscan: 10cm

meas7:
lens to nanoscan: 8cm

meas6:
lens to nanoscan: 6cm
~~~~~~~~~~~~~~~

~~~~~~~~~~~~~~~
From vacuum beam
meas 1:
lens to nanoscan: 8.5cm

meas 2:
lens to nanoscan: 10.5cm

meas 3:
lens to nanoscan: 12.5cm

meas 4:
lens to nanoscan: 14.5cm

meas5:
lens to nanoscan: 16.5cm

meas6:
lens to nanoscan: 17.5cm