Optical　sparse　aperture　systems　can　be　designed　to　obtain　high　resolution　in　astronomical　object　imaging.　It　is　a　particular　array　synthesized　by　several　small　filled　imaging　systems.　The　computer　simulations　are　achieved　for　the　three　typical　configurations　imaging　character　of　sparse　apertures　array.　The　analysis　is　presented　on　the　modulation　transfer　function　(MTF)　and　the　resulted　images　on　the　optical　experiments.　Image　restoration　of　the　direct　output　by　the　sparse　aperture　system　is　performed　by　using　the　Weiner　filter.　To　evaluate　the　whole　quality　of　optical　sparse　aperture　systems　for　the　complicated　target,　except　with　the　MTF,　the　correlation　coefficient　is　also　presented　as　a　new　objective　estimate　method　of　image　quality.　The　results　show　that　the　Tri-Arm　array　configuration　can　produce　the　higher　resolution　and　the　larger　correlation　coefficient　after　the　restoration.　Accordingly,　not　only　from　theoretical　analysis　but　also　based　on　the　experimental　data,　the　possibility　is　demonstrated　that　the　correlation　coefficient　is　considered　as　the　objective　estimate　method　of　image　quality,　and　the　optical　sparse　aperture　systems　can　achieve　almost　the　same　resolution　and　image　quality　as　an　equivalent　filled　system.