Reduce blurring and distortion in a projection type virtual image display using integrated small optics
Reduce blurring and distortion in a projection type virtual image display using integrated small optics
复制标题
使用集成小型光学器件减少投影型虚拟图像显示中的模糊和失真
DOI：
10.1117/12.2183173
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tomohiro Yendo
中科院分区：
文献类型：
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作者：
Tatsuya Hasegawa;Tomohiro Yendo
平视显示器（HUD）正在汽车上得到应用。HUD显示信息远虚拟图像在挡风玻璃上。现有的HUD通常显示平面信息。如果在HUD上显示增强现实（AR）等与道路风景相对应的图像，驾驶员可以有效地获取信息。为了实现这一点，需要覆盖大视场的HUD。然而，现有的HUD无法覆盖大的视场。因此，我们提出了由投影仪和许多小直径凸透镜组成的系统。但观测到的虚像存在模糊和畸变。本文提出了两种减少图像模糊和失真的方法。首先，通过调整组成透镜阵列的各屏幕与透镜之间的距离来减少图像模糊。从透镜离阵列中心越远越模糊的角度推断，造成模糊的原因是阵列中透镜的视场曲率。其次，为了避免图像失真，阵列中的每个透镜都是球面弯曲的。从透镜离阵列中心越远，畸变越大，畸变的原因是光线的入射角。我们证实了这两种方法的有效性。
Head Up Display (HUD) is being applied to automobile. HUD displays information as far virtual image on the windshield. Existing HUD usually displays planar information. If the image corresponding to scenery on the road like Augmented Reality (AR) is displayed on the HUD, driver can efficiently get the information. To actualize this, HUD covering large viewing field is needed. However existing HUD cannot cover large viewing field. Therefore we have proposed system consisting of projector and many small diameter convex lenses. However observed virtual image has blurring and distortion . In this paper, we propose two methods to reduce blurring and distortion of images. First, to reduce blurring of images, distance between each of screen and lens comprised in lens array is adjusted. We inferred from the more distant the lens from center of the array is more blurred that the cause of blurring is curvature of field of lens in the array. Second, to avoid distortion of images, each lens in the array is curved spherically. We inferred from the more distant the lens from center of the array is more distorted that the cause of distortion is incident angle of ray. We confirmed effectiveness of both methods.