We completed the arrangement of the optics described in 2393.

A bit of misalignment from an ND filter in front of the 250mm lens was corrected, and some slight account had to be made for the phase shifter not being perfectly vertical (i.e. introducing pitch misalignment from horizontal incidence). The IRMC mode matching was optimised through alignment and fine tuning of the 75mm and 250mm lens positions, and we recovered the transmission of 1.79 mW of TEM00 from the IRMC (power meter measurement).

We will compare the new result to that of 1904