| http://www.w3.org/ns/prov#value | - ??? ( x ff - q ??? ??? f ??? ??? ?? ??? ??? z ) ??? ??? ??? ??? ??? q ??? ??? ?? ) ( 4 ) [0077] where: xff, yff are the far-field transverse coordinates, [0078] q is the order of diffraction, [0079] K is a constant with all the terms not dependent on q lumped in, [0080] Jq is a Bessel function of the first kind, order q, [0081] ?? is the wavelength. [0082] From (4), it can be seen that the introdu
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