In alog 33915 I used my images of the steering mirror under the thin film polarizers to identify possible clipping.

In alog 33986 I posted images of the clipping I found today.

This shift in the beam on the steering mirror would come about from a Nothward shift in the beam on the thin film polarizers, which would indicate an Eastward shift in the beampath of the EOM.

Here are images supporting the beam shift:

Attachment 1: images of the wedge in the EOM path shows the beam moved Eastward

Attachment 2: images of the steering mirror shows the beam moved Northward

Attachment 3: image of the iris down stream of the bottom periscope mirror shows the beam moved Southward

Attachment 4: Drawing that shows that all of these beam changes are consistent.