Interferometric　imaging　systems　measure　the　complex　visibility,　which　is　the　Fourier　transform　of　the　source　brightness　distribution,　according　to　the　van　Cittert-Zemike　theorem.　Both　the　amplitude　and　phase　of　the　visibility　are　needed　to　produce　images　of　a　complex　object　structure　by　Fourier　inversion.　In　this　paper,　by　using　the　generalized　imaging　theory　of　a　diftraction-limited　incoherent　imaging　system,　the　pinhole　model　and　the　circular　aperture　model　of　the　interferometry　are　presented　and　derived.　The　approximate　condition,　which　should　be　followed　by　optical　aperture　synthesis　imaging　interferometry,　is　obtained　by　comparing　two　models.　Based　on　this　condition,　the　angle　of　field-of　-view　(FOV)　in　the　object　space　is　analyzed　and　determined.　At　the　good　approximation,　the　FOV　is　about　one-sixth　of　an　Airy　disk　of　a　elementary　aperture　diffraction.　Also　the　computer　simulation　results　are　presented　and　match　the　theoretical　results　very　well.　This　suggests　that　the　extremely　high　image　resolution　can　be　achieved　in　the　interferometric　imaging　systems,　but　it　generally　has　a　very　small　field　of　view.　Such　imaging　systems　are　suitable　only　for　the　astronomical　application.