Experimental measurement of the atmospheric primary aberrations by a four-aperture differential image motion monitor

In this paper, the ability of the four-aperture differential image motion monitor (DIMM) to measure the atmospheric primary aberrations is verified experimentally as in agreement with the simulation results. It is shown that the four-aperture DIMM is able to measure the defocus term of atmospheric aberration with reasonable accuracy while the astigmatism term is less accurate and the coma term is not reliable. (paper)