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Entry  Sun May 15 19:55:15 2011, kiwamu, Update, Photos, ETMY optical bench ETMY_ss.jpg
    Reply  Sun May 15 21:27:51 2011, Jenne, Update, Photos, ETMY optical bench 
       Reply  Mon May 16 10:05:02 2011, kiwamu, Update, Photos, Re:ETMY optical bench 
Message ID: 4724     Entry time: Mon May 16 10:05:02 2011     In reply to: 4723
Author: kiwamu 
Type: Update 
Category: Photos 
Subject: Re:ETMY optical bench 

You are right. We should change or rotate the mirror mount.

Actually when Suresh and I were putting the mirror we rotated the mount  by 90 deg such that the fat side of the mount is at left had side.

It was because the fat side had been clipping the oplev beam when the fat side is at right.

At that moment we were blocking the green beam to only see the faint IR beam with a sensor card, so we haven't checked the green beam.

Anyway the mount is apparently not good for the green beam.

Quote from #4723

I didn't notice it the other day when I was working on putting in the trans QPD, but do we need to switch the mirror mount for the first turning mirror of the IR trans beam, which the green transmits through to go into the cavity?  It seems like we've set ourselves up for potential clipping.

 

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