33 | | LM: absolutely, I would minimize any movement of the telescope's mirror, as that is an already commissioned focal station, so the telescope collimation is already good. We shall use our internal mirror IN-TT and DM to align SHARK-NIR to the telescope. If errors in the mechanics are too big to be only compensated by our mirrors, then we can move the telescope's mirrors. In this case, SOUL shall "chase" the beam using its XYZ linear stages. As far as I know, SHARK-NIR will not be used together with LBTI (in trinocular observations, LMIRcam receives light from DX side). However, it is worth, at the end of the alignment, to check that our deployable arm, when un-deployed, does not vignette any of the technical FoV of LBTI (which is 120'' more or less). I think the latter activity can be performed only at night time...We also have to align the telescope pupil to our internal pupil, other than the PSF. |
| 33 | LM: absolutely, I would minimize any movement of the telescope's mirror, as that is an already commissioned focal station, so the telescope collimation is already good. We shall use our internal mirror IN-TT and DM to align SHARK-NIR to the telescope. If errors in the mechanics are too big to be only compensated by our mirrors, then we can move the telescope's mirrors. In this case, SOUL shall "chase" the beam using its XYZ linear stages. As far as I know, SHARK-NIR will not be used together with LBTI (in trinocular observations, LMIRcam receives light from DX side). However, it is worth, at the end of the alignment, to check that our deployable arm, when un-deployed, does not vignette any of the technical FoV of LBTI (which is 120'' more or less). I think the latter activity can be performed only at night time (authorize LBTI night collimation). We also have to align the telescope pupil to our internal pupil, other than the PSF. |