An investigation is made for a four-aperture, sparse optical synthetic aperture imaging system. The characteristics of both the diffraction-limited performance and the effects of aberrations on this system are obtained. According to the coverage range of optical transfer function, the space distribution's restrictive condition of sub-apertures and the diffraction-limited performance are deduced. The wavefront aberrations are classed as three types based on the relationship between the Strehl ratio and the sub-apertures' aberrations with the exponential approximation. The tolerance limits of piston error, tilt error and defocus error are calculated in terms of the Marechal criterion.
1.Chinese Acad Sci, Inst Opt & Elect, Chengdu, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
Wang, Shengqian,Rao, Changhui,Jiang, Wenhan. Diffraction-limited performance and aberration tolerance of a sparse optical synthetic aperture imaging system with four sub-apertures[J]. JOURNAL OF MODERN OPTICS,2008,55(11):1771-1785.