Optical　sparse　aperture　systems　can　be　designed　to　obtain　high　resolution　for　imaging　astronomical　object.　They　are　particular　arrays　synthesized　by　several　small　filled　imaging　systems.　In　this　paper,　a　principle　experiment　is　set　up　for　optical　sparse　aperture　system.　Imaging　of　the　extended　complex　object　is　achieved.　Image　restoration　of　the　direct　output　by　the　sparse-aperture　system　is　performed　by　measuring　the　point　spread　functions　(PSF)　and　by　using　the　Weiner　filter.　The　correlation　coefficient　is　proposed　as　a　criterion　to　determine　optimal　parameter,　and　evaluate　the　performance　of　the　algorithms.　The　results　show　that　Tri-Arm　array　configuration　among　three　kinds　of　configuration　models　can　produce　higher　resolution　and　larger　correlation　coefficient　value　after　restoration.　Accordingly,　based　on　the　experimental　data,　the　possibility　is　demonstrated　that　the　optical　sparse　aperture　systems　can　achieve　almost　the　same　resolution　and　image　quality　as　an　equivalent　filled　system.