We examine the chromatic properties of ghost images appearing in expanded viewing angle polarization-type head-up display systems. We propose an achromatic polarization correction method to suppress ghost images in the whole visible spectral range. The method is based on the use of two half-wave plates of orthogonal optical axis–one being laminated on the combiner, the other attached to the head-up display (HUD) projector. We show that in this configuration the dispersion of the two waveplates cancel each other. Based on the results, a ghost image free colour HUD is demonstrated with 13 ° × 40 ° FOV. We present our modeling and experimental results and our demonstration HUD system.

中文翻译：

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平视显示器中鬼像的消色差抑制

我们研究了出现在扩展视角偏振型平视显示系统中的重影的色度特性。我们提出了一种消色差偏振校正方法来抑制整个可见光谱范围内的重影。该方法基于使用两个正交光轴的半波片——一个层压在组合器上，另一个连接到平视显示器 (HUD) 投影仪。我们表明，在这种配置中，两个波片的色散相互抵消。基于结果，展示了具有 13° × 40° FOV 的无重影彩色 HUD。我们展示了我们的建模和实验结果以及我们的演示 HUD 系统。