Design and manufacture AR head-mounted displays: A review and outlook

Cheng, Dewen; Wang, Qiwei; Liu, Yue; Chen, Hailong; Ni, Dongwei; Wang, Ximeng; Yao, Chuanhao; Hou, Qichao; Luo, Gang; Wang, Yongtian

doi:10.37188/lam.2021.024

Cited by 80 publications

(56 citation statements)

References 93 publications

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“…[39] and ref. [50]. The relatively low efficiencies for green and blue are mainly attributed to the unoptimized unit cell structure for these two wavelengths, as well as stronger absorption of the silicon material at shorter wavelengths.…”

Section: Resultsmentioning

confidence: 99%

Ultracompact multifunctional metalens visor for augmented reality displays

Chen

Liang

et al. 2022

PhotoniX

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Virtual reality (VR) and augmented reality (AR) have found widespread applications in education, engineering, healthcare, and entertainment. However, these near-eye displays are often bulky and heavy, and thus are not suitable for long-term wearing. Metalenses, with an ultra-thin formfactor, subwavelength modulation scale, and high modulation flexibility, are promising candidates to replace the conventional optics in AR display systems. In this work, we proposed and fabricated a novel reflective dielectric metalens-visor based on Pancharatnam-Berry phase with see-through capability. It achieves diffraction-limited focusing behavior for the reflected red light, while keeping a good transmission spectrum in the visible region. Hence, this single piece metalens-visor can perform the function of two integrated elements simultaneously: an eyepiece and an optical combiner, which in turn greatly reduces the weight and the size of an AR display. We have implemented a proof-of-concept AR display system employing the metalens-visor, and experimentally demonstrated color AR images with good image quality. This work reveals the great potential of multi-functional metasurface devices which enables optical integration in interdisciplinary applications including wearable displays, biological imaging, and aeronautic optical instruments.

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Section: Resultsmentioning

confidence: 99%

Ultracompact multifunctional metalens visor for augmented reality displays

Chen

Liang

et al. 2022

PhotoniX

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“…Figure 1b depicts the generic sketch of an optical see-through AR system with an optical combiner. Throughout various optical architectures from free-space combiners 20 , 24 , total internal reflection (TIR) freeform combiners 25 , 26 , to waveguides with diffractive or reflective combiners 12 , the definition of the above parameters remains the same. But the VAC issue is more essential in AR than VR, as the image in an AR display is directly superimposed onto the real world with correct depth cues.…”

Section: Ar and Vr Display Systemsmentioning

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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“…Induced by UV exposure and subsequent thermal developed nanosized NaF crystal dispersed in glass matrix, a refractive index change of amplitude as high as 1000ppm is resulted [1,2] . Owing to their unique high amplitude of refractive index change, excellent thermal stability and high transparency, PTR glasses have found extensive applications as a matrix material for fabrication of various volume Bragg grating that are extensively serving as wavelength selective elements in construction of high performance lasers, spectroscopies, 3-D display instruments and AR devices [3][4][5][6][7][8][9][10][11] as well. Moreover, PTR glasses have been expecting to play even more important role in the realm of fiber optical [12] devices and integrated photonic [13][14] devices, for its unique characteristics stated above.…”

Section: Introductionmentioning

confidence: 99%

Optical waveguide manufactured in photo-thermo-refractive glass substrate by ion exchange

Hao

Guo

et al. 2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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Photo-thermo-refractive (PTR) glasses exhibit promising characteristics for volume Bragg grating fabrication, one of key devices for construction of high performance lasers, among other optical device and systems. Aiming at employing this type of glass materials in the field of integrated photonics, buried optical channel waveguide is manufactured in PTR glass substrate by Ag + /Na + thermal ion exchange and subsequent field assisted ion migration. The Ag + doped zone in glass substrate, which is also the waveguide core, can be driven to several micrometers under the glass substrate surface, which decreases the propagation loss to a value as low as 0.12dB/cm, by eliminate scattering loss at glass substrate defects. Cross section of the waveguide core can be also engineered to match the core of single mode fiber, ensures a low coupling loss to single mode fiber. Analysis demonstrated that the buried optical waveguide fabrication proves can be expected to be applied in functional integrated optical device implementation.

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Design and manufacture AR head-mounted displays: A review and outlook

Cited by 80 publications

References 93 publications

Ultracompact multifunctional metalens visor for augmented reality displays

Ultracompact multifunctional metalens visor for augmented reality displays

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

Optical waveguide manufactured in photo-thermo-refractive glass substrate by ion exchange

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