Fig. 1. Light field of a natural 3D scene and 7D plenoptic function. (a) Schematic of light field; (b) retinal image for far accommodation; (c) retinal image for near accommodation

Fig. 2. Illustration of light field sampling through a stack of discrete planes

Fig. 3. Schematic illustration of light field sampling through an array of optical elements

Fig. 4. Schematic illustration of computational multi-layer LF-HMD

Fig. 5. View examples captured through a dual-focal plane optical see-through HMD prototype^[12]. (a) Camera focused at the front resolution target located at 5 D distance; (b) camera focused at the back resolution target located at 1 D distance

Fig. 6. Different optical configurations of InI-HMD. (a) Magnifier-type eyepiece; (b) a see-through eyepiece^[23]; (c) combination of a relay optics and eyepiece^[24]; (d) combination of a collimation lens and substrate-guided combiner^[25]

Fig. 7. Multi-layer computational light field HMD configurations. (a) Without imaging optics^[34]; (b) combination of multi-layer SLM and a magnifying eyepiece^[35]; (c) combination of multi-layer SLM and a pinlight layer^[36]