Okoshi T, Yano A, Fukumori Y
Appl Opt. 1971 Mar 1;10(3):482-9. doi: 10.1364/AO.10.000482.
A screen consisting of a number of tiny triple mirrors (cubic corners) is an autocollimating screen which reflects back the incident ray of light always into the original direction. Such a screen can be used in a projection-type three-dimensional display. Proposed in this paper is a curved triple-mirror screen which is composed of many tiny triple mirrors having one cylindrical and two flat reflecting surfaces. Such a screen has a diffusing property in the vertical direction in addition to the autocollimating property in the horizontal direction. These properties enable us to furnish a wider observable field of view without reducing the image quality when it is used in a 3-D display system. Another advantage of this screen is that it has high reflection efficiency. It is found that the design theory and experiment show a good agreement, and that a horizontal directivity (autocollimation) of 0.5 degrees is attainable with a screen having 1-mm pitch.
由多个微小的三面镜（角锥棱镜）组成的屏幕是一种自准直屏幕，它总是将入射光线反射回原始方向。这样的屏幕可用于投影型三维显示器。本文提出了一种弯曲的三面镜屏幕，它由许多具有一个圆柱面和两个平面反射面的微小三面镜组成。这种屏幕除了在水平方向具有自准直特性外，在垂直方向还具有漫射特性。当这种屏幕用于三维显示系统时，这些特性使我们能够在不降低图像质量的情况下提供更宽的可观察视野。这种屏幕的另一个优点是它具有高反射效率。研究发现，设计理论与实验结果吻合良好，对于间距为1毫米的屏幕，可实现0.5度的水平方向性（自准直）。
