  In this letter, we present the photonic nanojet as a phenomenon in a
structured light generator system that is implemented to modify the source
focal spot size and emission angle. The optical system comprises a microlens
array that is illuminated by a focused Gaussian beam to generate a structured
pattern in the far-field. By introducing a spheroid with different aspect
ratios in the focus of the Gaussian beam, the source optical characteristics
change and a photonic nanojet is generated which will engineer the far-field
distribution. To probe the light fields we implement a high-resolution
interferometry setup to extract both the phase and intensity at different
planes. We both numerically and experimentally demonstrate that the pattern
distribution in the far-field can be engineered by photonic nanojet. As an
example, we examine prolate, sphere, and ablate geometries. An interesting
finding is that depending on the spheroid geometry, a smaller transverse FWHM
of a photonic nanojet with a higher diverges angle produces an increased
pattern field of view at the same physical size of the optical system.
