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VIS (SRM)
terrence.tsang - 11:55 Wednesday 06 February 2019 (7985) Print this report
SRM tilt sensing OPLEV calibration

Today,

Calibration data:

K1:VIS-SRM_TM_OPLEV_TILT_PIT_OUTPUT: [-90.2,-86.3,-81.4,-75.1,-67.1,-56.8,-44.3,-30.1,-14.5,2.1,18.1,33.9,47.6,59.6,69.6,77.2,83.3,87.7,90.7]

K1:VIS-SRM_TM_OPLEV_TILT_YAW_OUTPUT: [88.7,85.1,79.5,73.1,64.8,55.2,43.9,30.5,15.9,0.97,-14.3,-28.6,-42.0,-54.1,-63.6,-72.4,-78.5,-83.7,-87.6,-90.2]
 
data were measured with an average of 5 seconds and with a step of 0.1 mm QPD vertical/horizontal displacement.
 
the calibration plot was shown in the attached photo srmtmoplevtiltcal.png
 
using data from 7952, the calculated linear range of the sensor is ±226 µrad for pitch and ±309 µrad for yaw.
 
Using the calibration factors shown in the figure (0.006547 mm/cnts for pitch and 0.007115 mm/cnts for yaw), the roughly diagonalized OL2EUL matrix is:
 
SRM TILT OL2EUL
  TILT_PIT TILT_YAW
P 2.26226676  
Y   3.07438047
 
I implemented the matrix into the MEDM and took a snapshot.
Images attached to this report
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