Retinal projection type super multiview 3D head-mounted display with the variable function shutter using a DMD
Retinal projection type super multiview 3D head-mounted display with the variable function shutter using a DMD
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具有使用DMD的可变功能快门的视网膜投影型超级多视图3D头戴式显示器
DOI：
10.1117/12.2577440
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Hideya Takahashi
中科院分区：
文献类型：
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作者：
Takuro Ohara;Kayo Yoshimoto;Hideya Takahashi
我们先前已经提出了视网膜投影型超级多视点3D-HMD，其通过使用多重投影的视网膜图像的模糊来诱导观看者的眼睛的调节的刺激来向观看者提供3D图像。然而，在以前使用机械快门的HMD中，由于我们不能灵活地设计快门的功能，我们无法投射理想的多重视网膜图像。为了克服这个问题，我们提出了改进的3D-HMD与可变功能快门使用DMD作为光学快门。在所提出的3D-HMD中，通过时分显示多个视差图像，并且这些图像通过全息透镜会聚在各个点上。然而，由于使用多重曝光全息透镜，视差图像不仅会聚在正确的会聚点上，而且会聚在不必要的会聚点上。因此，为了仅通过对应于正确视差图像的一个会聚光，我们使用与显示设备同步的DMD快门。为了验证使用DMD作为快门的有效性，我们制作了原型3D-HMD，并证实原型3D-HMD的图像模糊可以诱导调节。由于使用DMD的高速光学快门通过改变DMD上的针孔图像来实现快门的功能，因此我们可以灵活地设计所提出的3D-HMD中的会聚点的数量和对准。因此，在所提出的3D-HMD中，我们可以通过使用DMD快门来投影理想的多投影视网膜图像。
We have previously proposed the retinal projection type super multi-view 3D-HMD which provides the viewer with 3D images by inducing the stimulus of the accommodation of the viewer’s eye using the blurring of the multiple projected retinal image. However, in the previous HMD using a mechanical shutter, since we could not flexibly design the function of the shutter, we could not project the ideal multiple retinal image. To overcome this problem, we propose the improved 3D-HMD with the variable function shutter using a DMD as an optical shutter. In the proposed 3D-HMD, multiple parallax images are displayed by time division, and these images are converged on respective points by the holographic lens. However, the parallax image converges not only on the correct convergent point but also on unnecessary convergent points due to using the multiple exposure holographic lens. Therefore, to pass only one convergent light corresponding to the correct parallax image, we used the DMD shutter synchronized to the display device. To verify the effectiveness of using a DMD as a shutter, we made the prototype 3D-HMD and confirmed that the blur of the image by the prototype 3D-HMD can induce the accommodation. Since the high-speed optical shutter using a DMD realizes the function as a shutter by changing the pinhole image on the DMD, we can flexibly design the number and the alignment of convergent points in the proposed 3D-HMD. Therefore, in the proposed 3D-HMD, we can project the ideal multiple projection retinal image by using the DMD shutter.