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Entry  Fri Jul 26 22:45:14 2013, manasa, Update, General, Vent progress 
    Reply  Tue Jul 30 00:21:15 2013, Koji, Update, General, Vent progress 
       Reply  Tue Jul 30 11:30:55 2013, manasa, Update, General, ITMX oplev 
          Reply  Tue Jul 30 13:41:35 2013, Koji, Update, General, ITMX oplev 
             Reply  Tue Jul 30 15:38:24 2013, manasa, Update, General, ITMX oplev 
Message ID: 8939     Entry time: Tue Jul 30 15:38:24 2013     In reply to: 8938
Author: manasa 
Type: Update 
Category: General 
Subject: ITMX oplev 

Quote:

I wonder what optics is causing the halo on the oplev beam.
It this comes from any uncoated lens (or similar) it should be identified.

We identified this to be coming from the uncoated concave lens that we have right after the He-Ne laser which should also be replaced in addition to the other problems with the oplev.

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