Lightweight spatial-multiplexed dual focal-plane head-mounted display using two freeform prisms

Cheng, Dewen; Wang, Qingfeng; Wang, Yongtian; Jin, Guofan

doi:10.3788/col201311.031201

Cited by 28 publications

(5 citation statements)

References 11 publications

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“…Such FFS prism solution, characterized by a reduced system size, can offer a broad FOV (>50 deg) and a large eye box (8 mm) at the same time 21 . Moreover, several FFS prisms can be pieced together for better display performance, such as larger FOV 23 and multifocal image projection 24 . However, for daily wear, the constituent FFS optics are still relatively thick (20 to 30 mm).…”

Section: Introductionmentioning

confidence: 99%

“…21 Moreover, several FFS prisms can be pieced together for better display performance, such as larger FOV 23 and multifocal image projection. 24 However, for daily wear, the constituent FFS optics are still relatively thick (20 to 30 mm). Holographic optics solutions operate based on holographic optical elements (HOEs), which are commonly made of thin photosensitive polymers with a typical thickness of tens of micrometers.…”

Section: Introductionmentioning

confidence: 99%

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Metasurface-enabled augmented reality display: a review

et al. 2023

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.Augmented reality (AR) display, which superimposes virtual images on ambient scene, can visually blend the physical world and the digital world and thus opens a new vista for human–machine interaction. AR display is considered as one of the next-generation display technologies and has been drawing huge attention from both academia and industry. Current AR display systems operate based on a combination of various refractive, reflective, and diffractive optical elements, such as lenses, prisms, mirrors, and gratings. Constrained by the underlying physical mechanisms, these conventional elements only provide limited light-field modulation capability and suffer from issues such as bulky volume and considerable dispersion, resulting in large size, severe chromatic aberration, and narrow field of view of the composed AR display system. Recent years have witnessed the emerging of a new type of optical elements—metasurfaces, which are planar arrays of subwavelength electromagnetic structures that feature an ultracompact footprint and flexible light-field modulation capability, and are widely believed to be an enabling tool for overcoming the limitations faced by current AR displays. Here, we aim to provide a comprehensive review on the recent development of metasurface-enabled AR display technology. We first familiarize readers with the fundamentals of AR display, covering its basic working principle, existing conventional-optics-based solutions, as well as the associated pros and cons. We then introduce the concept of optical metasurfaces, emphasizing typical operating mechanisms, and representative phase modulation methods. We elaborate on three kinds of metasurface devices, namely, metalenses, metacouplers, and metaholograms, which have empowered different forms of AR displays. Their physical principles, device designs, and the performance improvement of the associated AR displays are explained in details. In the end, we discuss the existing challenges of metasurface optics for AR display applications and provide our perspective on future research endeavors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metasurface-enabled augmented reality display: a review

et al. 2023

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“…Gaussian radial basis functions were used in an off-axis HMD [13]. Cheng et al and Zheng et al presented see-through HMDs with freeform prisms [14,15] and a freeform tilted combiner [16], respectively. Freeform surfaces were also applied in a microlens array module [17] and distortion correction [18].…”

Section: Introductionmentioning

confidence: 99%

Design of a low F-number freeform off-axis three-mirror system with rectangular field-of-view

Zhu¹,

Hou²,

Zhang³

et al. 2014

J. Opt.

100

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In this paper, a low F-number freeform off-axis three-mirror system with rectangular field-of-view (FOV) is presented, and the system has an integrated configuration that can be aligned with ordinary methods. The initial structure is solved analytically, and the optimization process is described in detail. This F/1.38 freeform system with a 4° × 5° FOV provides good imaging performance, especially in middle-wave and long-wave infrared bands. The primary mirror and the tertiary mirror are approximately tangent, so these two freeform mirrors can be fabricated on a single substrate. This configuration provides a solution to the practical application of freeform off-axis three-mirror systems. Additionally, a prototype of this system is demonstrated, and the imaging performance of the prototype is tested experimentally. The actual performance of the prototype is discussed and analyzed.

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“…Other possible interference source include spatial locations, amount and data format, and limitations in the field of view. These restrictions may further deteriorate the attention optimization [10,15,16] .…”

mentioning

confidence: 99%

Estimation of tunneling effect caused by luminance non-uniformity in head-up displays

Karar¹,

Ghosh²

2014

中国光学快报

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Head-up displays (HUDs) enable a pilot to manage aircraft activities by facilitating simultaneous access to the flight instrument data and to the outside scene. However, HUDs can also distract a pilot. This study shows that HUD luminance non-uniformity may force inappropriate distribution of attention between the events shown on HUD symbology and the outside scene because of the resultant differential contrast in the display area. Results of statistical analysis demonstrate considerable effects of HUD image luminance and ambient luminance, as well as their interaction, on the detection of events displayed on an HUD and the outside scene.OCIS codes: 330.0330, 350.0350,110.0110.

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Lightweight spatial-multiplexed dual focal-plane head-mounted display using two freeform prisms

Cited by 28 publications

References 11 publications

Metasurface-enabled augmented reality display: a review

Metasurface-enabled augmented reality display: a review

Design of a low F-number freeform off-axis three-mirror system with rectangular field-of-view

Estimation of tunneling effect caused by luminance non-uniformity in head-up displays

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