To answer that question, you need to know a little bit about diffraction-limited systems in optics and the Rayleigh criterion. Essentially, point-like sources

To answer that question, you need to know a little bit about diffraction-limited systems in optics and the Rayleigh criterion. Essentially, point-like sources (the laser emitter array and the target can be considered point sources when on the scale of lightyears) separated by an angle smaller than the angular resolution of the device in question cannot be resolved.