Opto-Electronic Advances, Год журнала: 2024, Номер 7(10), С. 240039 - 240039
Опубликована: Янв. 1, 2024
In lightweight augmented reality (AR) glasses, the light engines must be very compact while keeping a high optical efficiency to enable longtime comfortable wearing and ambient contrast ratio. "Liquid-crystal-on-silicon (LCoS) or micro-LED, who wins?" is recently heated debate question. Conventional LCoS system facing tremendous challenges due its bulky illumination systems; it often incorporates polarizing beam splitter (PBS) cube. To minimize formfactor of an system, here we demonstrate ultracompact consisting in-coupling prism, guide plate with multiple parallelepiped extraction prisms. The overall module volume including optics panel (4.4-μm pixel pitch 1024x1024 resolution elements), but excluding projection optics, merely 0.25 cc (cm3). Yet, our exhibits excellent illuminance uniformity impressive (36%–41% for polarized input light). Such high-efficiency expected revolutionize next-generation AR glasses.
Язык: Английский
Процитировано
20Broadband beam collimation metasurface for full-color micro-LED displays
Optics Express, Год журнала: 2024, Номер 32(6), С. 10252 - 10252
Опубликована: Фев. 23, 2024
Near-eye displays are widely recognized as a groundbreaking technological advancement with the potential to significantly impact daily life. Within realm of near-eye displays, micro-LEDs have emerged highly promising technology owing their exceptional optical performance, compact form factor, and low power consumption. However, notable challenge in integrating into is efficient light collimation across wide spectrum range. In this paper, we propose what believe be novel design broadband beam metasurface for full-color by harnessing wavefront phase modulation based on Huygens' principle. Our results demonstrate substantial reduction full width at half maximum (FWHM) angles, achieving 1/10, 1/20 red, green, blue compared those without metasurface, which best result far know. The central intensity increases 24.60, 36.49, 42.15 times. Furthermore, significant enhancement energy within ±10° achieved, respective multiplication factors 14.16, 15.60, 13.00. This has revolutionize field enabling high-performance, compact, lightweight micro-LED applications micro-projectors, beyond.
Язык: Английский
Процитировано
14Recent Applications of Optical Elements in Augmented and Virtual Reality Displays: A Review
ACS Applied Optical Materials, Год журнала: 2024, Номер 2(7), С. 1247 - 1268
Опубликована: Май 2, 2024
Augmented reality (AR) and virtual (VR) are emerging as a next-generation display platform, surpassing conventional flat panel displays. The AR/VR technologies garnering considerable attention from both industry academia they provide immersive user experiences smooth interaction between the real digital worlds. current displays, however, still face several challenges including limited field of view, small eye-box, conflict vergence accommodation, bulky form factor, heavy weight. This paper aims to comprehensive view optical elements emphasizing how enhance performance experience Various techniques explained in following two principal aspects: displays based on (1) holographic metasurfaces, (2) combined usage elements. In each section, characteristics principles components briefly explained. Then, their recent applications addressing limitations introduced.
Язык: Английский
Процитировано
10Advances and challenges in microdisplays and imaging optics for virtual reality and mixed reality
Device, Год журнала: 2024, Номер 2(6), С. 100398 - 100398
Опубликована: Июнь 1, 2024
Язык: Английский
Процитировано
9Next-generation interfaces: integrating liquid crystal technologies in augmented and virtual reality – A review
Liquid Crystals Reviews, Год журнала: 2024, Номер 12(1), С. 30 - 56
Опубликована: Янв. 2, 2024
Язык: Английский
Процитировано
8High‐luminance, large‐size 4K OLED microdisplays for VR/MR applications
Journal of the Society for Information Display, Год журнала: 2024, Номер 32(5), С. 371 - 378
Опубликована: Май 1, 2024
Abstract This work introduces LG Display's (LGD's) 1.3″ 4K full‐color organic light‐emitting diode (OLED) microdisplay panels with a peak brightness of more than 10,000 nits, which have been newly developed for high‐quality virtual reality/mixed reality (VR/MR) head‐mounted displays. To achieve these advanced high‐luminance OLED panels, we well‐controlled optical microcavity and outcoupling method, along optimized multi‐stack white devices CF‐on‐encapsulation technologies tailored to the high pixel density panels.
Язык: Английский
Процитировано
4Ghost image analysis for pancake virtual reality systems
Optics Express, Год журнала: 2024, Номер 32(10), С. 17211 - 17211
Опубликована: Апрель 18, 2024
Pancake optics (also known as polarization-based catadioptric system) has been widely used the imaging lens for virtual reality (VR) and mixed (MR) headsets because of its compact formfactor excellent image quality. However, such a folded pancake not only dramatically lowers optical efficiency to 25% utilization half mirror, but also suffers from ghost images due stray light multiple surface reflections imperfect polarization control inside system. In this paper, origins including paths are explored by experiment then analyzed simulation. The effect different incident angles on intensity each is investigated.
Язык: Английский
Процитировано
3Ultracompact and Highly Sensitive Atomic Magnetometer Array via a Polarization Volume Grating-Based Waveguide Structure
ACS Photonics, Год журнала: 2025, Номер unknown
Опубликована: Фев. 19, 2025
Язык: Английский
Процитировано
0High‐efficiency and ultracompact pancake optics for virtual reality
Journal of the Society for Information Display, Год журнала: 2024, Номер 32(5), С. 341 - 349
Опубликована: Май 1, 2024
Abstract Pancake lens has been widely used in virtual reality (VR) and mixed (MR) due to its compact form factor. However, using a half mirror (HM) fold the optical path results tremendous loss. To enhance efficiency while keeping factor, we present new folded system incorporating nonreciprocal polarization rotator. In our proof‐of‐concept experiment commercial Faraday rotator (FR), theoretically predicted 100% is validated. Besides, angular response of terbium gallium garnet (TGG) material simulated for first time indicate that such an FR relatively insensitive incident angle, which can dramatically contrast ratio pancake design. Finally, potential application optics ultracompact near‐infrared (NIR) night vision goggles also discussed.
Язык: Английский
Процитировано
2Geometric distortion on video see‐through head‐mounted displays
Journal of the Society for Information Display, Год журнала: 2024, Номер 32(5), С. 184 - 193
Опубликована: Май 1, 2024
Abstract Video see‐through (VST) head‐mounted displays (HMDs) reconstruct the physical world using outward‐facing cameras and depth sensors. One of major challenges for VST HMDs is geometric distortion pass‐through content. In this study, we present experimental setup metrology measurement on single‐camera dual‐camera HMDs. The compared to digital by HMD. Finally, investigate impacts camera misalignment distance without with angular‐based correction. results demonstrate that respect eye position primary root cause distortion. Dual‐camera necessary minimize placing close positions. Although correction can partially mitigate in a 2D plane, it remains challenge at multiple 3D space. method findings presented study may provide guidelines evaluation spatial accuracy hardware design.
Язык: Английский
Процитировано
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