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Message ID: 88     Entry time: Wed Aug 4 09:57:38 2010
Author: Aidan, James 
Type: Computing 
Category: Hartmann sensor 
Subject: RMS measurements with Hartmann sensor 


We set up the Hartmann sensor and illuminated it with the output from the fiber-coupled SLED placed about 1m away. The whole arrangement was covered with a box to block out ambient light. The exposure time on the Hartmann sensor was adjusted so that the maximum number of counts in a pixel was about 95% of the saturation level.

We recorded a set of 5000 images to file and analyzed them using the Caltech and Adelaide centroiding codes. The results are shown below. Basically, we see the same deviation from ideal improvement that is observed at Adelaide.

Attachment 1: rms_analyze_centroids_aidan.pdf  7 kB  | Hide | Hide all | Show all
Attachment 2: RMS_WonCode.png  17 kB  Uploaded Wed Aug 4 13:43:13 2010  | Hide | Hide all | Show all
Attachment 3: RMS_WonCodeLessPrism.png  18 kB  Uploaded Wed Aug 4 13:43:24 2010  | Show | Hide all | Show all
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