The pitch of the mirror changed when we glued the mirror and the relative change was measured with the oplev.

Height of the oplev beam on ruler:

• Before locking: 81 mm (klog15852).
• After releasing: 87.5 mm (klog15885).
• Distance between the mirror and the oplev ruler: 1713 mm (klog15852).

Therefore, the relative change in pitch is +3.8 mrad approximately, which is a lot. The value of pitch with respect to the horizontal still has to be measured.