Agile laser beam deflection with high steering precision and angular resolution using liquid crystal optical phased array

To improve the steering precision and angular resolution of liquid crystal optical phased array, in this paper, we proposed a modified periodic phase controlled method to realize a continuous scanning with a constant angular resolution of less than 20 μrad, meanwhile, its precision is less than 5 μrad (RMS). Also, another method we proposed is called sub-aperture coherence can realize even better angular resolution less than 5 μrad which is the limitation of our measurement instrument.