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terrence.tsang - 9:01 Friday 13 September 2019 (10505) Print this report

I am planning to do the DRIVEALIGN matrix for SRM. For preparation, I found that there is DC actuation coupling from L2P. I comfirmed that the oplev is still diagonalized and coarsely changed the OSEM2EUL.

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ayaka.shoda - 9:42 Friday 13 September 2019 (10507) Print this report

Hi Terrence,

Thank you for working on it.

I am not sure how you actuated the optic in DC, but please note that the optic rotates in pitch if you purely push the optic in L from the RM.
In order to identify the pure pitch and length motion, you have to see the transfer function. The gain of the L2P transfer function drops with f^-4 above the resonant frequency of the optic pendulum mode.

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