Optical fields with scale- and shape-invariant transverse intensity profiles consisting of a prescribed distribution of bright spots are introduced. Approximations of such fields are demonstrated by means of binary annular-aperture diffractive elements.
© 1998 Optical Society of America
Ville Kettunen and Jari Turunen, "Propagation-invariant spot arrays," Opt. Lett. 23, 1247-1249 (1998)