[Eleonora P, Yuhang]

We installed the IR injection telescope on the bench and we pre-installed the reflection telescope (putting all the optical mounts on the bench without fixing them).

We used the two 750 mm focal length lenses present in the lens box in the lab. Since we saw the beam focusing before the cavity, after the telescope, we thought one of the two focal lengths to be wrong. In fact the second one was actually wrong and it was replaced by another lens of 750 mm focal, located in the lab (Newport KPX121AR.18, PCX LENS, BK 7).

We put HR Laser Line mirrors, BK 7, ALTECHNA Co. Ltd.

In fig 1 the photo of the injection telescope on the bench. We used two of the new small mirror mounts.