Hello Frédéric,

Thanks for your question here!

In the Merit Function Editor, you can use the NSDD operand with Pix#=0 and Data=0 to read out the total power of a detector. Then you can give different weights to each detector output by using the PROB operand. The PROB operand multiplies the value of the operand defined by Op# by the factor defined by Factor. Finally, you can sum the previously weighted values by using the OSUM operand. OSUM sums the values of all operands between the two operands defined by Op#1 and Op#2.

You may find more information about the applied general math operands in the Help file under: The Optimize Tab (sequential ui mode) > Automatic Optimization Group > Merit Function Editor (automatic optimization group) > Optimization Operands by Category > General Math Operands.

For 2 different detectors, the Merit Function would look like this:

Then, in the Universal Plot 2D, you can set the Dependent Variable Z to report the current system merit function by selecting 'Merit' for the 'Operand'. If the system merit function is selected, then either the entire merit function or any specific operand’s value may be selected using


the 'Line' control. In the 'Line' control you should select the line that calculates the weighted sum by OSUM:

If you have any further questions, please let us know, and we will be happy to help!

Best,

Csilla 

Thank you very much Csilla Timar-Fulep!