In this paper, a compact and diffraction limited heads up display (HUD) image source is presented. The great benefit of this design is its diffraction limited optic, compacted structure, economic considerations, simplicity in manufacturing and high efficiency image quality. The innovation of this design is the use of a polarization grating-polarization conversion system (PG-PCS). This module transforms the unpolarized Gaussian beam to a linearly polarized beam and it simultaneously homogenizes the spatial intensity profile. With this module, it is possible to increase the efficiency of illumination and to utilize the ordinary micro LCD instead of using a digital micro mirror device (DMD) and liquid crystal on silicon (LCOS) micro displays. The diameter of the image plane is 76.2 mm (in accordance with conventional types). Our design yielded uniform illuminated image and its high efficiency facilitates display readability in see-through HUDs operating in high ambient light as well as low ambient light.

本文提出了一种紧凑且受衍射限制的平视显示器（HUD）图像源。这种设计的最大好处是其衍射受限的光学器件，紧凑的结构，经济方面的考虑，制造的简单性和高效的图像质量。该设计的创新之处在于使用了偏振光栅-偏振转换系统（PG-PCS）。该模块将非偏振高斯光束转换为线性偏振光束，同时使空间强度轮廓均匀化。使用此模块，可以提高照明效率并利用普通的微型LCD代替使用数字微镜器件（DMD）和硅上液晶（LCOS）微型显示器。图像平面的直径为76.2 mm（根据常规类型）。