Novel diffraction limit implied geometric lens imaging model based on a finite number of pixels for integral imaging display

Abstract

We propose a novel diffraction limit implied geometric lens imaging (DLI-GLI) model considering diffraction effect on a finite number of pixels in elemental image (EI)and 3D depth priority-oriented integral imaging (DPO-II) showing variations of the lateral resolution (LR) within enhanced depth of focus (DoF) range graphically. We assigned 3 representative gaps between lens array and display panel including gap at conventional DPII to find the optimized DoF and enhanced LR. We show that the number of pixels in an elemental lens (EL), and focal length and width of the lens determine practical LR and DoF at the focal plane, and the numerically induced DOP-II with two specified DPO-gaps which are larger than focal length have the enhanced LR and DoF comparing with those of the conventional DPII presenting the optimized LR and DoF near to two DPO-gaps. We show that one of the DPO-gaps has largest DoF and another has largest resolution within some part of DoF in the on-axial DPO-spot size diagram (DPO-SD). Though this DPO-SD, it is expected that the various 3D geometric imaging configurations according to the application fields of 3D imaging could be designed as well. Finally, we verified that the numerically induced 3 geometrical structures based on the proposed model show the similar results with measurements of the optical experiments on the built-up DPO-asymmetric II (DPO-AII) system.