Design of a head-up display based on freeform reflective systems for automotive applications

Wei, Shili; Fan, Zichao; Zhu, Zhengbo; Ma, Donglin

doi:10.1364/ao.58.001675

Cited by 51 publications

(16 citation statements)

References 19 publications

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“…The distance of the virtual image is 2 meters, the display size is 10 inches, and the eye box area is 130 * 50mm 2 . Wei et al [30] placed the image source, plane mirror, and free-form surface mirror on the same horizontal plane, and designed structural constraints and optimization strategies. No matter where the pupil is located in the rectangular eye socket, the human eye can observe the virtual image.…”

Section: Introductionmentioning

confidence: 99%

Notice of Violation of IEEE Publication Principles: Design and Performance of an Off-Axis Free-Form Mirror for a Rear Mounted Augmented-Reality Head-Up Display System

Meng

et al. 2021

IEEE Photonics J.

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A novel optical-transmission rear mounted augmented reality head-up display, which can be used to improve the safety of a driving vehicle, is introduced and investigated in this paper. The proposed system uses an off-axis free-form mirror that serves as asymmetric aberration corrector. The off-axis aberration of the system is analyzed and the mirror is designed to correct both linear astigmatism and spherical aberration. This makes it possible to optimize the whole optical system. We also analyze the relationship between human eyes and the virtual image to obtain a registration matrix. The experimental results show that the size of the virtual image is 11 inches, the imaging distance is 2.8 meters, and the area of the eye box is 140 * 60 mm 2. The novel system makes it possible to fuse the virtual image with the real-life scene to improve driver safety.

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Section: Introductionmentioning

confidence: 99%

Notice of Violation of IEEE Publication Principles: Design and Performance of an Off-Axis Free-Form Mirror for a Rear Mounted Augmented-Reality Head-Up Display System

Meng

et al. 2021

IEEE Photonics J.

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“…Freeform surfaces are defined as non-rotational symmetric surfaces, which can effectively balance asymmetric aberrations. Wei presented a small-volume HUD based on the lateral distribution of a single freeform surface [23]. Gu presented an aircraft HUD system based on an off-axis reflective configuration with four freeform surfaces [24].…”

Section: Introductionmentioning

confidence: 99%

Automated design of freeform imaging systems for automotive head-up display applications

Ma¹,

Fan²,

Wei³

et al. 2023

Preprint

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Freeform imaging system is playing a significant role in developing an optical system for the automotive head-up display (HUD), which is a typical application of augmented reality (AR) technology. There exists a strong necessity to develop automated design algorithms for automotive HUDs due to its high complexity of multi-configuration caused by movable eyeballs as well as various drivers’ heights, correcting additional aberrations introduced by the windshield, variable structure constraints originated from automobile types, which, however, is lacking in current research community. In this paper, we propose an automated design method for the automotive AR-HUD optical systems with two freeform surfaces as well as an arbitrary type of windshield. With optical specifications of sagittal and tangential focal lengths, and required structure constraints, our given design method can generate an initial structure with high image quality automatically, and then the final system is realized by our proposed iterative optimization algorithms with superior performances due to the extraordinary starting point. Two examples of AR-HUD systems at different structures are realized automatically by our presented automated design algorithms. Both AR-HUD designs can have superior optical performance for an eye-box of 130mm×50mm and a field of view of 13°×5°, which demonstrates the feasibility and superiority of our proposed design framework.

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“…Recent HUDs project speed, security information, or simple navigation signs on the windshield forming a small virtual image floating above the road in the line of sight of the driver 1 . The field of view (FOV) of current HUDs is limited to about 3 deg vertical and 10 deg horizontal viewing angles 2 – 5 Next-generation HUD systems are expected to provide augmented reality (AR) features, where the warning signs or navigation instructions are overlaid on the real objects they refer to 6 .…”

Section: Introductionmentioning

confidence: 99%

Wide field of view flat-panel head-up display system

et al. 2023

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We propose a novel flat panel-based head-up display (HUD) to realize a large viewing angle automotive display. The proposed flat-panel geometry is straightforward to integrate into the dashboard. We also provide a flat-panel compatible solution to eliminate the ghost image and stray-light in large field of view using space-variant polarization sheets and optimized directional filtering, respectively. The proposed system provides an image area that is about 14 times larger compared to commercial HUD, and the P-polarized virtual image is also viewable with polarized sunglasses. The virtual image distance in our experimental system is closer than in commercial HUD.

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Design of a head-up display based on freeform reflective systems for automotive applications

Cited by 51 publications

References 19 publications

Notice of Violation of IEEE Publication Principles: Design and Performance of an Off-Axis Free-Form Mirror for a Rear Mounted Augmented-Reality Head-Up Display System

Notice of Violation of IEEE Publication Principles: Design and Performance of an Off-Axis Free-Form Mirror for a Rear Mounted Augmented-Reality Head-Up Display System

Automated design of freeform imaging systems for automotive head-up display applications

Wide field of view flat-panel head-up display system

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