Acquiring　light　field　with　larger　angular　resolution　and　higher　spatial　resolution　in　low　cost　is　the　goal　of　light　field　capture.　Combining　or　modifying　traditional　optical　cameras　is　a　usual　method　for　designing　light　field　capture　equipment,　among　which　most　models　should　deliberate　trade-off　between　angular　and　spatial　resolution,　but　augmenting　coded　aperture　avoids　this　consideration　by　multiplexing　information　from　different　views.　On　the　basis　of　coded　aperture,　this　paper　suggests　an　improved　light　field　camera　model　that　has　double　measurements　and　one　mask.　The　two　compressive　measurements　are　respectively　realized　by　a　coded　aperture　and　a　random　convolution　CMOS　imager,　the　latter　is　used　as　imaging　sensor　of　the　camera.　The　single　mask　design　permits　high　light　efficiency,　which　enables　the　sampling　images　to　have　high　clarity.　The　double　measurement　design　keeps　more　correlation　information,　which　is　conductive　to　enhancing　the　reconstructed　light　field.　The　higher　clarity　and　more　correlation　of　samplings　mean　higher　quality　of　rebuilt　light　field,　which　also　means　higher　resolution　under　condition　of　a　lower　PSNR　requirement　for　rebuilt　light　field.　Experimental　results　have　verified　advantage　of　the　proposed　design:　compared　with　the　representative　mask-based　light　field　camera　models,　the　proposed　model　has　the　highest　reconstruction　quality　and　a　higher　light　efficiency.