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Using the Geometrical enclosed energy plot

The GEE plot is a plot of the enclosed (encircled or ensquared) energy versus radius from the the spot centroid.

To create a GEE window:

  1. Select from the menu Analysis > Energy > GEE
  2. To select encircled or ensquared, press the Options button to get the options panel and select using the Ensquared checkbox.

Options panel

gee-options
Field
Using the Field popup menu, select the field for which you wish to calculate. Select All to calculate for all fields (this can be time-consuming if combined with all waves).
Wave
Using the Wave popup menu, select the wave for which you wish to calculate. Select All to calculate for all waves (this can be time-consuming if combined with all fields).
Pattern
The pattern of waves in the pupil. Only area-filling patterns are available.
Number of rays
For each field and for each wave, the pupil is sampled using N rays distributed according to the selected pattern.
Color by
How to color the curves for identification.
Paraxial trace
If checked, all rays are traced paraxially.
Subtract centroid
If checked, the centroid of the spot is used as a reference. Otherwise the chief ray is used as a reference. This is done on a per field, per wave basis.
Divide by focal length
If checked the radius is given in terms of object-space angle by dividing by the focal length.
Afocal analysis
If checked the ray direction (momentum) is used instead of ray position.
Ensquared
If checked the ensquared energy is calculated. If not checked the encircled energy is calculated.
Maximum radius
To specify the maximum radius from the reference point to be shown in the plot.
Plot entire radius range
If checked, the maximum radius will be the largest value from amongst the traced rays.

See also