OptInt PmWiki : MROI Fast Tip Tilt / Tech Meet 10

Technical Meeting #10: Selection of preferred layout(s)

The objective of this meeting was to decide which *one or two* layouts from the four candidates (OAP, DLT, Zoom, DT - see TechMeet6) should be identified as preferred in the CoDR document.

Taking into account at least the following:

Conclusions

We have selected the DLT layout as the only preferred layout. If we reduce the focal length, this layout allows the baseplate to be pinned close to the camera.

The other layouts were rejected for at least the following reasons:

Zoom
Seems impossible to make sufficiently achromatic lenses, even if 2nd lens is swapped between blue/red versions. We can revisit the lens design after the CoDR if necessary.
DT
Hard to make baseplate sufficiently stiff.
OAP
Alignment of OAP. Hard to make baseplate stiff. Throughput not significantly better than DLT.

New Tasks

(Printable View of http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/MROIFastTipTilt/TechMeet10)