A new reconstruction algorithm was proposed based on multi-perspective imaging characteristics of a microlens array and geometrical optical principles.By proposed algorithm,an original object was reconstructed with the elemental image array captured by a CCD camera.In compasison with traditional method using optical systems,this algorithm was not affected by the stray light and diffraction effect in the process of reconstruction,and has advantages of real-time and sharp quality.An experimental platform based on a three-dimensional digital imaging system with a microlens array was setup to reconstruct the elemental image array of a die captured in experiment,a volumetrically original image was reconstructed through this algorithm successfully.It is proved that the algorithm is feasible and valid both theoretically and experimentally.Finally,several factors affecting the imaging quality in the experiment are analyzed.