Design and fabrication of square micro-lens array for integral imaging 3D display

Micro-lens array (MLA) with high aspect ratio, precise alignment and great uniformity of focusing are crucial to the integral imaging 3D display systems. In this work, we employed the square micro-lens array (SMLA) with ideal aspect ratio of 100%, to realize high performance integral imaging 3D display systems. The parameters of SMLA and the according reconstruction performances were first simulated using TracePro software, it was shown that the SMLA can effectively reduce the effects of stray light on the reconstruction image, while keeping the brightness due to the high aspect ratio compared to that using circular MLA and pinhole array, thus to achieve high quality reconstruction image. Polymer SMLA with great converging performance and aspect ratio of around 88%, were then successfully fabricated using screen printing technique. An integral imaging 3D display system with high brightness, little color moiré patterns and clear image was demonstrated using the fabricated SMLA, exhibiting good reconstruction performance.