Lenslet VR: Thin, Flat and Wide-FOV Virtual Reality Display Using Fresnel Lens and Lenslet Array

With rapid advances in high-speed communication and computation, augmented reality (AR) and virtual reality (VR) are emerging as next-generation display platforms for deeper human-digital interactions. Nonetheless, to simultaneously match the exceptional performance of human vision and keep the near-eye display module compact and lightweight imposes unprecedented challenges on optical engineering. Fortunately, recent progress in holographic optical elements (HOEs) and lithography-enabled devices provide innovative ways to tackle these obstacles in AR and VR that are otherwise difficult with traditional optics. In this review, we begin with introducing the basic structures of AR and VR headsets, and then describing the operation principles of various HOEs and lithography-enabled devices. Their properties are analyzed in detail, including strong selectivity on wavelength and incident angle, and multiplexing ability of volume HOEs, polarization dependency and active switching of liquid crystal HOEs, device fabrication, and properties of micro-LEDs (light-emitting diodes), and large design freedoms of metasurfaces. Afterwards, we discuss how these devices help enhance the AR and VR performance, with detailed description and analysis of some state-of-the-art architectures. Finally, we cast a perspective on potential developments and research directions of these photonic devices for future AR and VR displays.

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“…88 with permission from IEEE, e ref. 91 and f ref. 92 under the Creative Commons Attribution 4.0 License diffraction artifacts and stray light.…”

Section: Form Factormentioning

confidence: 99%

“…Interestingly, the lenslet and pancake optics can be combined to further reduce the system form. Bang et al 91 demonstrated a compact VR system with a pancake optics and a Fresnel lenslet array. The pancake optics serves to fold the optical path between the display panel and the lenslet array (Fig.…”

Section: Form Factormentioning

confidence: 99%

Augmented reality and virtual reality displays: emerging technologies and future perspectives

et al. 2021

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“…Lenslet VR: Thin, Flat and Wide-FOV Virtual Reality Display Using Fresnel Lens and Lenslet Array by K. Bang, Y. Jo, M. Chae and B. Lee (Bang et al, 2021).…”

Section: Spot Light In Optical Information Processing and Holographymentioning

confidence: 99%

Frontiers in Photonics Spot Light

et al. 2022

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“…In the work “Lenslet VR: Thin, Flat, and Wide‐FOV VR Display,” presented in the I‐Zone by Kiseung Bang and colleagues from Seoul National University, 2 they described a glasses‐like form factor VR light‐field display with a Lenslet array ( Fig . ).…”

Section: Near‐eye Displays With Focus Cuesmentioning

confidence: 99%

“…(bottom) Optical configuration of the Lenslet VR versus conventional VR. By “using a Fresnel Lenslet array, a Fresnel lens, and a polarization‐based optical folding technique,” 2 they were able to shrink the total display and viewing optics module thickness to 8.8 mm, where the air gap between the display plan to the lens is 3.3 mm. Source: OEQELAB, Seoul National University.…”

Section: Near‐eye Displays With Focus Cuesmentioning

confidence: 99%