deletions | additions       diff --git a/At_the_Nasmyth_table_of__.tex b/At_the_Nasmyth_table_of__.tex  index f6d41c5..4e7cce5 100644  --- a/At_the_Nasmyth_table_of__.tex  +++ b/At_the_Nasmyth_table_of__.tex 
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At the Nasmyth table of the telescope, the upstream beam is split by the FTT dichroic so that some is transmitted to M3 of the telescope and the rest is reflected to a corner cube on the table, which in turn reflects light into the FTT. A deployable shear measurement camera on the Nasmyth table allows the shear (transverse displacement) of the primary fiducial to be compared with the shear of the exiting  telescope pupil. The initial coarse alignment of the system (requirement 1) involves using pop-up quad cells at M5 and M4, which allow the shear of the primary fiducial to be measured at these locations, and manual adjustments can then be used to center the beams.