Spiegler J B
Br J Physiol Opt. 1980;34:27-33.
An equation is presented describing the angular velocity of an image, viewed by an observer when a plane mirror is undergoing angular velocity. The image velocity is determined at the observer's entrance pupil. An expression to determine the size of the mirror aperture for a given exposure time is also presented. The results indicate that, in general, the image velocity is not constant nor twice the mirror velocity, as is usually assumed. Also, if the mirror extends to an equal length on each side of its axis of rotation, then the time in which the image appears to travel from the mirror's edge to the axis of rotation does not equal the time in which it appears to travel from the axis to the other edge.
本文给出了一个方程，用于描述当平面镜以角速度转动时观察者所看到的图像的角速度。图像速度是在观察者的入瞳处确定的。还给出了一个表达式，用于确定给定曝光时间下的镜孔尺寸。结果表明，一般来说，图像速度并不像通常所假设的那样恒定，也不是镜面速度的两倍。此外，如果镜子在其旋转轴两侧延伸的长度相等，那么图像从镜子边缘移动到旋转轴所需的时间并不等于从旋转轴移动到另一边所需的时间。
