Complex Holographic Advanced Optical Spatial light modulator (CHAOS)

汽车上的抬头显示器（hud）正变得越来越普遍，并且已经被证明可以通过让司机的眼睛盯着道路来显著降低事故率。传统的汽车HUD投影系统在亮度、对比度、分辨率/清晰度、功耗、尺寸和颜色变化方面受到限制。最初用于豪华汽车市场的下一代增强现实和高性能hud的要求非常苛刻，全息hud在这些领域都提供了各种优势。两家TreesPhotonics公司利用其高度创新和专利的纯相位全息技术展示了非常高质量的hud，该技术正在进行商业开发。然而，相位全息HUD需要大量的计算资源，并且分辨率受到当前FPGA和内存技术的限制。此外，现有的纯相位空间光调制器提供的帧率受到液晶弹性特性的限制。为了提供HUD功能的阶跃变化，该项目寻求开发全息HUD，利用实时全息图计算驱动的完全复杂的光调制（即振幅和相位），以实现实现汽车HUD关键创新所需的更高性能特征。这种方法的计算复杂性降低，将使显示器的分辨率和帧率大大提高，远远超过当前的基线技术。两树光电在全息显示和光学系统方面具有世界领先的技术能力。本课题将通过仿真确定最可行的调制器实现方案，实现空间光调制器。将开发全息算法来匹配完全复杂的光调制，并将制作一个演示单元。该项目最初专注于汽车领域，但也为航空航天、医疗、铁路、船舶、近眼设备和增强现实提供了机会。

Head up displays (HUDs) in cars are becoming increasingly common & have been shown tosignificantly reduce accident rates by keeping the drivers eyes on the roads. Conventionalautomotive HUD projection systems are limited in brightness, contrast, resolution/definition,power usage, size & colour variation. The next generation requirements for AugmentedReality & high performance HUDs initially for the luxury car market are very demanding &holographic HUDs provide a variety of advantages in each of these areas. Two TreesPhotonics have demonstrated very high quality HUDs using its highly innovative & patentedphase only holography, which are in the process of being exploited commercially. However,phase only holographic HUD requires extensive computational resource & resolution is at thelimit of current FPGA & memory technology. Additionally, the frame-rate afforded by theexisting phase only spatial light modulators is limited by the elastic properties of liquidcrystals. To provide a step change in HUD capability the project seeks to develop aholographic HUD that utilises fully complex light modulation (i.e. both amplitude & phase)driven using real-time hologram computation in order to realise the higher performancecharacteristics needed to enable key innovations in automotive HUD. The reducedcomputational complexity of this approach will allow the resolution & frame-rate of thedisplay to be enhanced far beyond the current baseline technology. Two Trees Photonics hassignificant world leading technical capability with holographic display & optical systems. Theproject will determine the most feasible modulator implementation by simulation & realise thespatial light modulator. Holographic algorithms will be developed to match the fully complexlight modulation & a demonstrator unit will be fabricated. The project is initially focused onautomotive but provides opportunities in aerospace, medical, rail, marine, near eye devices &augmented reality.