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Message ID: 7816     Entry time: Wed Dec 12 16:52:12 2012
Author: Jenne 
Type: Update 
Category: Alignment 
Subject: PR2_face, PR3_back cameras in place 

I have setup cameras looking at the back of PR3 (through the north viewport on the MC chamber) and the face of PR2 (through the north viewport on the ITMX chamber). We would like a view of the face of PR3, but that isn't possible without placing another in-vac mirror.  The best we can do is the current PRM_BS camera setup, which sees a small portion of the PR3 face.  Most of the face is obscured by the PRM itself. 

I have taken images with the PRM misaligned.  The spot near the top of PR2 is the first reflection from the pitch-misaligned PRM, so it should be ignored for the purposes of trying to see the straight-shot, no PRM beam.

Images are taken with my videocapture50 script, in ..../scripts/general/videoscripts.  This takes 10 sets of 50 images and saves them.  Then ImageBkgndSubtractor.m located in the same folder takes the images (you must edit the beginning of the script to tell it where the images are), averages the noBeam images (PSL shutter closed), and averages the withBeam images, and subtracts them.  Results below:

PR2_face_12Dec2012_SpotImage.pngPR2_face_12Dec2012_SpotImage_pixelsTimes3.png

PR3_back_12Dec2012_SpotImage.pngPR3_back_12Dec2012_SpotImage_pixelsTimes3.png

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