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Reports until 20:10, Saturday 14 July 2012
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matthew.evans@LIGO.ORG - posted 20:10, Saturday 14 July 2012 - last comment - 15:23, Thursday 19 July 2012(3446)
Optical Levers - interference fringes?

The ETM optical lever shows interference fringes when the TM is subject to a large longitudinal drive.  I guess this will go away when the front surface beam is found, but it is something to look for on all the optical levers to be sure that we don't add noise from longitudinal motion.

Comments related to this report
thomas.vo@LIGO.ORG - 13:57, Monday 16 July 2012 (3452)
Link 

Whenever you guys (ISC) are ready, I can go in and fix that.
matthew.evans@LIGO.ORG - 15:23, Thursday 19 July 2012 (3510)
Link

A quick check of ITMY (push in a length offset and remove it) show no signs of fringes.

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