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ao:lab_dm
This is an old revision of the document!
A small (feed-forward) DM in the lab is fantastic for saving on cost, but can be a little awkward to fit in. The documents below show one way to fit a DM with a 2mm pupil in to the CHARA lab, replacing the BRT secondary with a BK7 lens, a flat, the DM and a new paraboloid. The original intention was two curved mirrors and a DM. From MJI's email of 5 Feb 2012: “ I'm thinking that if a 3 reflection option doesn't work, possibly an option with two achromats may work, especially if we can ignore lambda < 550nm.”
The DM mount size has halved since this original work. MJI has checked the effect of this, and the second paraboloid can be made a little less off axis, but there isn't otherwise much change to this setup. The xlsx file should probably be ignored but is a good starting point, and the ZMX file only has a 1mm pupil on the DM, when it can be 2mm.
CHARA_Small_DM.ZMX
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ao/lab_dm.1530898654.txt.gz · Last modified: 2018/07/06 13:37 by 127.0.0.1
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