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Pupil patterns

Here are the various pupil patterns that may be selected for layout views or analyses.

x-fan

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Linear array of points sampling the interval from Px = -1 to Px = +1. This is the tangential scan.


y-fan

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Linear array of points sampling the interval from Py = -1 to Py = +1. This is the sagittal scan.


hexapolar

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A hex number (1, 7, 19, 37, 61, 91, ...) of points on a circularized hexagonal array. The edge of the pupil is half-way between the rings.


Square

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A square array of points. The edge of the pupil is half-way between the points on axis. The corner points are cut off by the stop, if it has an aperture assigned to it.


Random

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Random points in a circular pupil.


Spiral

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Spiral curve with equal irradiance per area of pupil. Tends to give smoother Encircled Energy plots.


See also