Abstract
The Maxwellian near-eye displays have attracted growing interest in various applications. By using a confined pupil, a Maxwellian display presents an all-in-focus image to the viewer where the image formed on the retina is independent of the optical power of the eye. Despite being a promising technique, current Maxwellian near-eye displays suffer from various limitations such as a small eyebox, a bulky setup and a high cost. To overcome these drawbacks, we present a holographic Maxwellian near-eye display based on computational imaging. By encoding a complex wavefront into amplitude-only signals, we can readily display the computed histogram on a widely-accessible device such as a liquid-crystal or digital light processing display, creating an all-in-focus virtual image augmented on the real-world objects. Additionally, to expand the eyebox, we multiplex the hologram with multiple off-axis plane waves, duplicating the pupils into an array. The resultant method features a compact form factor because it requires only one active electronic component, lending credence to its wearable applications.
Highlights
Compact and portable, near-eye displays hold great promises in augmented reality (AR), virtual reality (VR) and mixed reality (MR) applications such as social communication, healthcare, education, and entertainment[1,2]
We encode this complex hologram into an amplitude image to facilitate its display on a commonly-accessible device such as a liquid-crystal display (LCD) or a digital light processing (DLP) display
Our amplitude display consists of a phase spatial light modulator (SLM) (Meadowlark, 9.2 μm pixel pitch, 1920 × 1152 resolution) and a linear polarizer oriented 45° with respect to the x-axis[30]
Summary
Near-eye displays hold great promises in augmented reality (AR), virtual reality (VR) and mixed reality (MR) applications such as social communication, healthcare, education, and entertainment[1,2]. In Maxwellian displays, the chief rays emitted from the display panel converge at the eye pupil and form an image at the retina (Fig. 1a). After multiplexing different directional plane carrier waves to the virtual target image, we first compute a multiplexing complex hologram based on free-space Fresnel diffraction.
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