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AIRYPATTERN Comptue the radial Airy pattern
intensity = AiryPattern((angles,pupil,nm)

Compute the radial Airy pattern for diffraction by
a circular aperature.

“angles” visual angle in radians
“pupil” diameter in mm
“nm” is wavelength in nm

Intensity is normalized to max of 1.

Formulae from Hecht, Optics, 2cd edition, p. 419.

See also DIFFRACTIONMTF, PSYCHOPTICSTEST.