Foveated imaging by polarization multiplexing for compact near‐eye displays

Yin, Kun; He, Ziqian; Li, Yannanqi; Wu, Shin‐Tson

doi:10.1002/jsid.1120

Cited by 9 publications

(7 citation statements)

References 17 publications

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“…Among the examples utilizing a combination of optical elements, one notable approach is the employment of pancake optics, also referred to as folded optics. ,− This technique harnesses a series of partial-reflective and polarization-reflective elements to compactly fold the light path within a thin form factor, substantially enhancing the magnification of the optical system in a space-efficient manner. Maimone et al implemented thin and glasses-like VR NED based on pancake optics using an on-axis concave mirror-like PPHOE and polarization optics .…”

Section: Combined Usage Of Optical Elementsmentioning

confidence: 99%

Recent Applications of Optical Elements in Augmented and Virtual Reality Displays: A Review

Choi,

Han,

Min

et al. 2024

ACS Appl. Opt. Mater.

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Augmented reality (AR) and virtual reality (VR) are emerging as a next-generation display platform, surpassing conventional flat panel displays. The AR/VR technologies are garnering considerable attention from both industry and academia as they provide immersive user experiences and smooth interaction between the real and digital worlds. The current AR/VR displays, however, still face several challenges including limited field of view, small eye-box, conflict between the vergence and accommodation, bulky form factor, and heavy weight. This paper aims to provide a comprehensive view of optical elements of AR/VR displays, emphasizing how they enhance the performance and user experience of the AR/VR displays. Various techniques are explained in the following two principal aspects: AR/VR displays based on (1) holographic optical elements and metasurfaces, and (2) combined usage of optical elements. In each section, the characteristics and principles of the optical components are briefly explained. Then, their recent applications addressing the limitations of the conventional AR/VR displays are introduced.

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Section: Combined Usage Of Optical Elementsmentioning

confidence: 99%

Recent Applications of Optical Elements in Augmented and Virtual Reality Displays: A Review

Choi,

Han,

Min

et al. 2024

ACS Appl. Opt. Mater.

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“…In the VR pancake structure, a CLC reflector can replace the QWP and reflective polarizer to obtain a simpler structure. Furthermore, a foveated VR display can be achieved via encoding two images into orthogonal circular polarizations by using CLC reflector 201 . As shown in Fig.…”

Section: Reflective Lc Planar Opticsmentioning

confidence: 99%

Advanced liquid crystal devices for augmented reality and virtual reality displays: principles and applications

et al. 2022

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Liquid crystal displays (LCDs) and photonic devices play a pivotal role to augmented reality (AR) and virtual reality (VR). The recently emerging high-dynamic-range (HDR) mini-LED backlit LCDs significantly boost the image quality and brightness and reduce the power consumption for VR displays. Such a light engine is particularly attractive for compensating the optical loss of pancake structure to achieve compact and lightweight VR headsets. On the other hand, high-resolution-density, and high-brightness liquid-crystal-on-silicon (LCoS) is a promising image source for the see-through AR displays, especially under high ambient lighting conditions. Meanwhile, the high-speed LCoS spatial light modulators open a new door for holographic displays and focal surface displays. Finally, the ultrathin planar diffractive LC optical elements, such as geometric phase LC grating and lens, have found useful applications in AR and VR for enhancing resolution, widening field-of-view, suppressing chromatic aberrations, creating multiplanes to overcome the vergence-accommodation conflict, and dynamic pupil steering to achieve gaze-matched Maxwellian displays, just to name a few. The operation principles, potential applications, and future challenges of these advanced LC devices will be discussed.

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“…For the sake of portability, users are expecting a greater overall size of the virtual reality headset display [47,48]. However, the optical system itself has properties that require a long enough optical path distance for the light to travel through the overall optical system if the image of the microdisplay is to be magnified [49,50]. On this basis, if one wants to optimize the volume of the virtual reality headset display, one requires an increase in the number of light reflections in the optical system and an enhancement of the effective optical path distance of the light [51,52].…”

Section: Pancake Structural Helmet Displaysmentioning

confidence: 99%

Advanced Study of Optical Imaging Systems for Virtual Reality Head-Mounted Displays

Ren

Dong

et al. 2023

Photonics

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Driven by the rapid innovation of science and technology and industrial manufacturing technology, virtual reality display technology has developed rapidly. At present, the application of virtual reality display technology is expanding in many fields such as military, medical, aviation and education. This paper analyzes the imaging principle of the human vision system and the optical performance requirements of VR heads-up display, summarizes the current design scheme of VR heads-up optical imaging system, focuses on the principle and index parameters of each optical system, and compares the advantages and disadvantages of different schemes. The development prospects and directions of virtual reality headset displays are also prospected.

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Foveated imaging by polarization multiplexing for compact near‐eye displays

Cited by 9 publications

References 17 publications

Recent Applications of Optical Elements in Augmented and Virtual Reality Displays: A Review

Recent Applications of Optical Elements in Augmented and Virtual Reality Displays: A Review

Advanced liquid crystal devices for augmented reality and virtual reality displays: principles and applications

Advanced Study of Optical Imaging Systems for Virtual Reality Head-Mounted Displays

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