Design of ultra-compact augmented reality display based on grating waveguide with curved variable-period grating

Wu, Yuanjun; Pan, C. T.; Gao, Yibing; Lu, Changtai; Zhang, Yinxin; Huang, Zhanhua

doi:10.1016/j.optcom.2022.128980

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…The fabrication quality of the replicated samples is evaluated with two complementary measurement methods at Optofidelity: image quality measurement and a Littrow diffractometer. Littrow measurements provide direct feedback regarding the homogeneity and reproducibility of the fabrication process 3 , 4 . With this method, one can precisely measure the grating period and relative orientation of grating lines.…”

Section: Methodsmentioning

confidence: 99%

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Enabling mass manufacturing of industry-standard optical waveguide combiners

Steiner,

Jotz,

Bachhuber

et al. 2023

J. Optical Microsystems

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.Nanoimprinting of surface-relief grating-based waveguides has the potential to produce one of the industry-leading augmented reality (AR) smart glasses, but there are still many challenges in the design, scaling, and reproducibility of these imprinted waveguides. A promising path toward mass manufacturing of optical waveguide combiners is via large-area nanoimprinting. Here, we present the complete value chain with partners involved throughout the process: from design, mastering, and materials to imprinting and metrology, to prove that this method improves not only the manufacturing throughput but also the waveguide quality. We demonstrate that the replication and image quality are true to the intended design using large area, high refractive index (n = 1.9), square (300 mm × 300 mm) glass substrates with high-refractive index resins (n = 1.9). This is shown to be valid for over 100 replications and for large area nanoimprinting (Gen5, 1100 mm × 1300 mm). Our goal is to demonstrate a viable path toward high-volume and low-cost manufacturing of AR waveguides based on surface relief gratings.

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Section: Methodsmentioning

confidence: 99%

“…Littrow measurements provide direct feedback regarding the homogeneity and reproducibility of the fabrication process. 3,4 With this method, one can precisely measure the grating period and relative orientation of grating lines.…”

Section: Metrologymentioning

confidence: 99%

Enabling mass manufacturing of industry-standard optical waveguide combiners

Steiner,

Jotz,

Bachhuber

et al. 2023

J. Optical Microsystems

View full text Add to dashboard Cite

show abstract

“…The fabrication quality of the replicated samples is evaluated with two complementary measurement methods: image quality measurement and a Littrow diffractometer. Littrow measurements provide direct feedback regarding the homogeneity and reproducibility of the fabrication process [2,3]. With this method, one can precisely measure the grating period and relative orientation of grating lines.…”

Section: Waveguide Optics Metrology By Optofidelitymentioning

confidence: 99%

Enabling the Metaverse through mass manufacturing of industry-standard optical waveguide combiners

Steiner

Jotz

Bachhuber

et al. 2023

Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) IV

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Nanoimprinting of surface-relief grating-based waveguides has the potential to result in the best performing Augmented Reality (AR) smart glasses, but there are still many challenges in the design, scaling, and reproducibility of these imprinted waveguides. We presented a promising path toward mass manufacturing of optical waveguide combiners via large-area nanoimprinting at SPIE AR/VR/MR 2022. This alternative route for manufacturing surface-relief gratings on a larger area generated much interest.This follow-up paper presents a further optimized design based on the lessons learned from the previous paper, with a particular focus on quality. The complete value chain with partners is involved throughout the process of this iterative update: from design, mastering, and materials to imprinting and metrology, to prove that this method improves not only the manufacturing throughput but also the waveguide quality. We demonstrate that both the replication and image quality is true to the intended design using large area, high refractive index (1.9 RI), square (300 x 300mm) glass substrates with high refractive index resins (1.9 RI). Our objective is to further establish this new approach towards high-volume and low-cost manufacturing of waveguides based on surface relief gratings as a viable path forward for enabling the Metaverse.

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Review of substitutive assistive tools and technologies for people with visual impairments: recent advancements and prospects

Muhsin,

Qahwaji,

Ghanchi

et al. 2023

J Multimodal User Interfaces

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The development of many tools and technologies for people with visual impairment has become a major priority in the field of assistive technology research. However, many of these technology advancements have limitations in terms of the human aspects of the user experience (e.g., usability, learnability, and time to user adaptation) as well as difficulties in translating research prototypes into production. Also, there was no clear distinction between the assistive aids of adults and children, as well as between “partial impairment” and “total blindness”. As a result of these limitations, the produced aids have not gained much popularity and the intended users are still hesitant to utilise them. This paper presents a comprehensive review of substitutive interventions that aid in adapting to vision loss, centred on laboratory research studies to assess user-system interaction and system validation. Depending on the primary cueing feedback signal offered to the user, these technology aids are categorized as visual, haptics, or auditory-based aids. The context of use, cueing feedback signals, and participation of visually impaired people in the evaluation are all considered while discussing these aids. Based on the findings, a set of recommendations is suggested to assist the scientific community in addressing persisting challenges and restrictions faced by both the totally blind and partially sighted people.

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Design of ultra-compact augmented reality display based on grating waveguide with curved variable-period grating

Cited by 4 publications

References 22 publications

Enabling mass manufacturing of industry-standard optical waveguide combiners

Enabling mass manufacturing of industry-standard optical waveguide combiners

Enabling the Metaverse through mass manufacturing of industry-standard optical waveguide combiners

Review of substitutive assistive tools and technologies for people with visual impairments: recent advancements and prospects

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