Possibly some kind of trick for manipulating light can be used that bends/turns light just enough such as refraction, electronic tricks or mirror bending.

But maybe with tiny mirrors it will be too little to make a difference.

But since they probably are not perfectly flat maybe they can rotate until their flaws come close to approximating a very flat parabola.

At a mile a way, the change over 1 millimeter of parabolic mirror would be molecular.

manipulated liquid or bent mirror-like surface

My favorite idea so far, since bending light using gravity is probably out of the question, is to flex the mirror