Design and fabrication of a holographic head-up display with asymmetric field of view

Abstract

It is difficult to design and fabricate a head-up display (HUD) with a large asymmetric field of view (FOV) while maintaining a good image quality. In this paper, we design and develop such a holographic HUD system. To improve luminance and enhance the environmental adaptability of the HUD, we use a liquid crystal display with high brightness as well as a holographic reflection element. The vertical FOV is tilted to an angle of -7°, which is consistent with the actual view of the pilot. The decentration and tilt of the optical relay system effectively compensate for the distortion and off-axis aberration due to the asymmetric FOV and tilted, curved combiner. The transition plates used in the mechanical structure significantly decrease the difficulty in fabrication and alignment, and virtual prototyping greatly reduces the risk and shortens the development cycle. Experimental results demonstrate that this prototype achieves a total FOV of 30° (horizontal) ×24° (vertical), a resolution of 1280×1024, and a 5% distortion.

Optical elements containing semitransparent wavelike films

“…Let us write the local dielectric constant of the multilayer structure as a function of x and z: ε = ε(x, z). If h = 0, ε does not depend on x and is a step function of z: ε = ε(z), which has two values ε (1) and ε (2) . Let us describe the periodic structure modulation along the x-axis as the xdependent shift of the ε(z) function argument:…”

P‐89: Wavefront Aberration Compensation Method for Holographic Optical Element

“…So far, many related studies have been conducted to solve this problem in the research and industrial fields. For example, a compensation system composed of relay lenses is added to the display system or additional lenses such as cylindrical lens is applied to the HOE recording procedure [11,12]. This method is limited to certain aberration in fixed optical system, and therefore the aberration that is deformed by the surrounding environment such as heat or moisture cannot be compensated as time goes on.…”

Holography for automotive applications: from HUD to LIDAR

“…These holographic combiners have been successfully used in both HUD and head mounted display (HMD). [11][12][13][14][15][16] Figure 1 presents the recording and use of a conformational holographic combiner. To avoid aberrations, the object beam used in the recording setup should have the same wavefront as the reading beam.…”