I am relatively new to zemax/optical design as a whole and am trying to add a merit function to set the effective focal length of the system and can’t seem to find the correct menu/drop down that will give me this option. All I could find were work arounds to set f/# but would appreciate if someone could point me to where I can directly enter in the desired effective focal length. Thanks!
Once you’ve generated a default merit function using the wizard, you can manually add your own operands. If you place them above the DMFS operand you can regenerate the default merit function without overwriting your manually added operands.
The operand to control the effective focal length is EFFL.
For example:
Hello chrisw,
I agree with David’s suggestion. Therefore note that “Wave” in the above case is the first wavelength that you defined in “wavelengths editor”! If you jsut want to inspect effective focal length a certain “Target” is not necessary and set “Weight” to zero. Otherwise optimization process will try to set your optical system to sepcified target value accroding to non-zero weight.
Open help window pressing “F1” and enter “Optimization Operands” to obtain more information on merit function optimization operands and restrictions …
Kind regards,
Christian
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