Improving head-up display with waveguides and holographic optical elements

Bigler, Colton; Mann, Micah S.; Draper, Craig; Bablumyan, Arkady; Blanche, Pierre Alexandre

doi:10.1117/12.2507575

Cited by 2 publications

(1 citation statement)

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“…Besides, the horizontal angle of view of the eyebox is the angle between an image width and human eyes under the premise of not affecting the image quality that a narrow angle could easily result in inconvenient viewing for a driver. According to some previous studies [8,9], the HUD systems based on the principles of total internal reflections and holographic waveguides have some advantages such as decreasing the total volume and increasing the eyebox. However, there are some problems or limitations from the holographic waveguide HUD systems by using many HOEs.…”

Section: Introductionmentioning

confidence: 99%

An Augmented Reality Head-Up Display System with a Wide-View Eyebox

Chuang

Chen

et al. 2020

International Journal of Optics

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This study proposes to apply the combination of two 90-degree prisms and a holographic optical element to an image-dividing element, divide an image into three through the virtual image projection system, and accurately project the images to 160 cm behind the windshield. In order to distinguish the left image, middle image, and right image at the horizontal direction, the 90-degree prism is first utilized for horizontally deflecting the light, a holographic optical element is then used for presenting the vertical deflection of the image, and finally, the images are horizontally arranged as a real image on the diffuser. An image-dividing element is eventually integrated to the virtual image projection system. Then, the divided images are made as a virtual image which is projected to 160 cm behind the windshield to combine with the street scene. The horizontal angle of view of an eyebox is increased from 2.51° to 7.22°, and the size of the eyebox is 31.68 cm × 12.48 cm, allowing a wide-view laser-based head-up display with the large-angle beam-splitting function being successfully designed. It would not affect the field of view on the road, and this system could reduce the space and be arranged easily in a vehicle. Therefore, this proposed system is suitable for the aftermarket.

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Section: Introductionmentioning

confidence: 99%