The use of optical waveguides in head up display (HUD) applications
The use of optical waveguides in head up display (HUD) applications
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光波导在平视显示器 (HUD) 应用中的使用
DOI：
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发表时间：
2013
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影响因子：
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通讯作者：
Malcolm Homan
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文献类型：
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作者：
Malcolm Homan
光波导在平视显示器（HUD）上的应用是一种使能技术，它解决了体积减小（包括座舱侵入）和质量减少的关键问题，在价格合理的产品中保留了与当今一代基于数字显示的HUD相关的高性能光学功能。由于光波导的固有特性，无论安装如何，都可以提高操作性能和飞行员舒适度，这使得BAE系统公司电子系统公司能够分别为眩光屏蔽和头顶HUD安装开发两种不同的产品流。本文阐述了下一代平视显示器开发背后的设计驱动因素及其与不断发展的座舱架构和结构的兼容性。大规模光波导合成器的实现能够匹配并超过通常仅与当前数字显示源hud相关的显示性能，这使得BAE系统电子系统公司能够利用其LiteHUD®技术解决最新军用和民用驾驶舱的体积和安装挑战。安装在眩光罩上的基于波导的hud与增加大面积显示器（LAD）的趋势相兼容，以取代军用快速喷气驾驶舱内传统的多个头向下显示器（HDD）。他们使用了显示的“间接视图”变体，该变体允许高分辨率数字显示设备与波导光学器件固有的小体积和低质量相结合。然后使用传统HUD组合器的更传统技术进行查看。这种技术的成功结合导致了LPHUD产品，该产品是由BAE系统公司电子系统专门设计的，提供了一个超低尺寸的HUD，可以安装在LAD后面；仍然提供的性能水平至少相当于传统的大体积安装的眩光屏蔽HUD。在目前的许多公务机和航空运输驾驶舱中，头顶安装的hud采用传统的光学组合器，将显示从单独的投影仪传递到飞行员的眼睛。在BAE系统公司的电子系统QHUDTM配置中，这种组合器被波导取代，并且完全消除了笨重的侵入式头顶投影仪。结果是设备体积和质量的显著减少，以及更大的头部间隙和更大的头部运动箱。后一种特性是波导光学解决方案的基本成果，它消除了与当前传统系统相关的飞行员眼睛定位的限制。LiteHUD®由BAE系统公司开发，电子系统公司以更低的成本、质量和体积实现了与现役hud相当的光学性能。
The application of optical waveguides to Head Up Displays (HUD) is an enabling technology which solves the critical issues of volume reduction (including cockpit intrusion) and mass reduction in an affordable product which retains the high performance optical capabilities associated with today’s generation of digital display based HUDs. Improved operability and pilot comfort is achieved regardless of the installation by virtue of the intrinsic properties of optical waveguides and this has enabled BAE Systems Electronic Systems to develop two distinct product streams for glareshield and overhead HUD installations respectively. This paper addresses the design drivers behind the development of the next generation of Head Up Displays and their compatibility with evolving cockpit architectures and structures. The implementation of large scale optical waveguide combiners capable of matching and exceeding the display performances normally only associated with current digital display sourced HUDs has enabled BAE Systems Electronic Systems to solve the volume and installation challenges of the latest military and civil cockpits with it’s LiteHUD® technology. Glareshield mounted waveguide based HUDs are compatible with the trend towards the addition of Large Area Displays (LAD) in place of the traditional multiple Head Down Displays (HDD) within military fast jet cockpits. They use an “indirect view” variant of the display which allows the amalgamation of high resolution digital display devices with the inherently small volume and low mass of the waveguide optics. This is then viewed using the more traditional technology of a conventional HUD combiner. This successful combination of technologies has resulted in the LPHUD product which is specifically designed by BAE Systems Electronic Systems to provide an ultra-low profile HUD which can be installed behind a LAD; still providing the level of performance that is at least equivalent to that of a conventional large volume glareshield mounted HUD. In many current Business Jet and Air Transport cockpits overhead mounted HUDs employ a conventional optical combiner to relay the display from a separate projector to the pilot’s eyes. In BAE Systems’ Electronic Systems QHUDTM configuration this combiner is replaced by the waveguide and the bulky, intrusive overhead projector completely eliminated. The result is a significant reduction in equipment volume and mass and a much greater head clearance combined with a substantially larger Head Motion Box. This latter feature is a fundamental outturn of waveguide optical solutions which removes the restrictions on pilot eye positioning associated with current conventional systems. LiteHUD®, developed by BAE Systems, Electronic Systems achieves equivalent optical performance to in-service HUDs for less cost, mass and volume.