Fig. 1: Overview of waveguide holography.
a Conceptual illustration of the proposed display architecture using the exit-pupil expanding waveguide (WG). The hologram projection module consists of SLM, a linear polarizer (LP), a half wave plate (HWP), and beam splitter (BS) for illumination path. Apertures with different colors indicates software-steered eyebox that can be formed in the arbitrary 3D space at the out-coupler side, fully exploiting the étendue expansion capability of the waveguide. b A photograph of the compact prototype for the proof-of-concept. The SLM size can be further reduced since the active area is only as large as the input coupler size, which is 20% of the total SLM area. c A benchtop prototype built for design iteration and benchmarking the performance. L1 and L2: lenses for 4- f imaging system, M: mirror. See Method for the details of the system implementation. Graphics rendered by Eric Davis.
