We start to work on the cal. unit.

  • We measure a differential focus between the blue/yellow spots and the red one. The 2 best focal planes are at about 1mm.

Blue PatCam hole position: [176; 140], Pupil motor Blue position: [769; 488]

TN: 20140507_172643 -> M2 flat light on blue pupil. We try to put in the Zmx Lgsw, compute slopes and reconstruct 36 modes.

M3 DoF ABS REL
Tip -713 -155
Tilt 710 380

Hexapod DoF Value
X -4.5
Y -5.45
Z 4.45
Rx -317
Ry -190

TN: 20140507_181001

We move light to red pupil. Red PatCam hole position: [187; 129], Pupil motor Red position: [393; 688]

We check the position of Hexapod when we were on-sky on March. We take values from the telescope log of 20140323, UT: 02:31:37 (LUCI images w dichroic)

Hexapod DoF Value
X -3.6
Y -1.7
Z 2.7
Rx -326
Ry -162

and UT: 02:55:51 (LUCI images w/o dichroic).

Hexapod DoF Value
X -3.6
Y -1.6
Z 2.5
Rx -335
Ry -160

We acquire images in and out of focus with the cal unit spots on the PatCams:

TN: 20140507_222210 -> Hexapod Z: 5.8mm

TN: 20140507_222357 -> Hexapod Z: 2.8mm

15:52: final positions for M2, M3 and Hexapod before retracting the cal unit arm:

M3 DoF ABS REL
Tip -724 -166
Tilt 691 362

DoF Total Coll. Hexapod Global Offset
X -4 -4.5 -0.216
Y -7.4 -5.45 -3.4
Z 3.6 4.4 0
Rx -139 -316 -29.2
Ry -210 -190 -5.3

M2 Zernikes um rms
Z2 -9.0
Z3 2.0
Z5 0.2
Z6 -1.5
Z7 0.4
Z8 -1.0

Using the in and out of focus images we evaluate the proper rotation of the PatCams. With respect the Blue one the Yellow is rotated by 150deg, the Red one by -166deg.
Topic revision: r1 - 08 May 2014, MarcoBonaglia
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