The unpolarized light from a lamp would be concentrated by a reflector and directed to a polarizing beam splitter. 灯发出的散射光将集中到一个反射面，并指向一偏振分光镜。
Lenses can be placed between the beam splitter and the computer display to focus the image so that it appears at a comfortable viewing distance. 在分光镜和电脑显示器之间放几个透镜，即可调整影像的焦点，使它看起来像是隔著某个舒适的观察距离。
