Hedili M Kivanc, Soner Burak, Ulusoy Erdem, Urey Hakan
Opt Express. 2019 Apr 29;27(9):12572-12581. doi: 10.1364/OE.27.012572.
We present a novel head-mounted display setup that uses the pinhole imaging principle coupled with a low-latency dynamic pupil follower. A transmissive LCD is illuminated by a single LED backlight. LED illumination is focused onto the viewer's pupil to form an eyebox smaller than the average human pupil, thereby creating a pinhole display effect where objects at all distances appear in focus. Since nearly all the light is directed to the viewer's pupil, a single low-power LED for each primary color with 0.42 lumens total output is sufficient to create a bright and full-color display of 360 cd/m luminance. In order to follow the viewer's pupil, the eyebox needs to be steerable. We achieved a dynamic eyebox using an array of LEDs that is coupled with a real-time pupil tracker. The entire system is operated at 11 msec motion-to-photon latency, which meets the demanding requirements of the real-time pupil follower system. Experimental results effectively demonstrated our head-mounted pinhole display with 37° FOV and very high light efficiency, equipped with a pupil follower with low motion-to-photon latency.
我们展示了一种新颖的头戴式显示器设置，它采用针孔成像原理并结合了低延迟动态瞳孔跟踪器。一个透射式液晶显示器由单个发光二极管背光源照亮。发光二极管照明被聚焦到观看者的瞳孔上，以形成一个比普通人眼瞳孔小的视场光阑，从而产生一种针孔显示效果，即所有距离的物体看起来都清晰聚焦。由于几乎所有的光都被导向观看者的瞳孔，每个原色使用一个总输出为0.42流明的低功率发光二极管就足以创建一个亮度为360 cd/m²的明亮全彩显示器。为了跟踪观看者的瞳孔，视场光阑需要是可操纵的。我们通过使用与实时瞳孔跟踪器相结合的发光二极管阵列实现了动态视场光阑。整个系统以11毫秒的运动到光子延迟运行，满足了实时瞳孔跟踪系统的严格要求。实验结果有效地证明了我们具有37°视场和非常高的光效率的头戴式针孔显示器，它配备了具有低运动到光子延迟的瞳孔跟踪器。
