Project

General

Profile

Focus summaries » History » Version 2

Aaron Roodman, 11/14/2012 07:15 PM

1 1 Aaron Roodman
h1. Focus summaries
2 1 Aaron Roodman
3 1 Aaron Roodman
h3. 11/13/2012 
4 1 Aaron Roodman
5 2 Aaron Roodman
The focus looks good during the period of the DES mini 1a survey.  During community time there were two images burned to allow the focus to settle, indicated by the blue arrows.  These two looked to have reasonable focus already.  However, there were three other images, circles, taken after large slews where the focus was indeed off by 50-100 microns.  I conclude that there may be good reason to burn an image after large slews.  Lastly, I mark the set of images taken for the program "Fast Cadence Imaging", with one second z band images with slews between every image.  The mean focus is about right, but there do seem to be larger deviations here.
6 1 Aaron Roodman
7 1 Aaron Roodman
attachment:FandA20121113-donutdzvsimageno.pdf
8 1 Aaron Roodman
9 1 Aaron Roodman
h3. 11/12/2012
10 1 Aaron Roodman
11 1 Aaron Roodman
Most of the images on this night were out of focus.  The exact cause is still under investigation, but seems to be due to the tweaks (ie. the values the AOS determines for how much the hexapod should move) not being implemented by the hexapod.  
12 1 Aaron Roodman
13 1 Aaron Roodman
attachment:FandA20121112-donutdzvsimageno.pdf
14 1 Aaron Roodman
15 1 Aaron Roodman
h3. 11/11/2012
16 1 Aaron Roodman
17 1 Aaron Roodman
The focus generally looks fine, except after 150330 where the values are generally out of focus by 100 microns. Conceivably this is due to the same thing that caused problems on 11/12.
18 1 Aaron Roodman
19 1 Aaron Roodman
attachment:FandA20121111-donutdzvsimageno.pdf
20 1 Aaron Roodman
21 1 Aaron Roodman
22 1 Aaron Roodman
h3. 11/10/2012
23 1 Aaron Roodman
24 1 Aaron Roodman
The focus looks reasonable, outside of a few images.  The blue arrows point to burned images for focus.  The focus is a little worse for these images, and there are also several other images which are a bit of focus, presumably from large slews.
25 1 Aaron Roodman
26 1 Aaron Roodman
attachment:FandA20121110-donutdzvsimageno.pdf
27 1 Aaron Roodman
28 1 Aaron Roodman
h3. 11/7/2012
29 1 Aaron Roodman
30 1 Aaron Roodman
The focus looks reasonable.  Some of the community images rotated quickly through different filters, and the focus does seem to change here by a small fixed amount.
31 1 Aaron Roodman
32 1 Aaron Roodman
attachment:FandA20121107-donutdzvsimageno.pdf