...

• S1=S2, L1=L2 - the 2x1 sides should have equal length and width,
• D1=D2 - the 2x1 diagonals should be equal,
• dS1 = dS2 = 2*dL1 =2*dL2 - tilt angle should provide consistent deviation for all corners,
• dD=0, d(dS)=0, and d(dL)=0 - within precision of measurement.

...

• In Quad 1, pair: 3 mis-measured x and y - Use it as iscorrection is applied as discussed below.
• In Quad 3, pair: 5 mis-measured x and y - Use it as iscorrection is applied as discussed below.
• All other measurements are consistent within measurement precision about 10um
• Angles of 2x1 are in the range from -0.64 to +0.38 degree.

Quality check can be improved in 2013-01-24-CSPAD-XPP-Metrology-standard.txt if:

 Q1,p3:
 12   21331   47024      47 -> x+200, y-200
 12   21531   46824      47
 
 Q3,p5:
 24   90849   68979     218 -> x+300, y-200
 24   91149   68779     218

...

offset_corr/0-end.data

 0  0 -3 -21
 0 -3 -3 -1
 0  0  0  0

marg_gap_shift/0-end.data

...

Test plot for CSPad using PyCSPadImage/src/Alignment.py

Image RemovedImage Added