这些设备通常都使用透镜镜头，将不同的图像向两个固定的方向投影。
These devices usually use lenticular lenses to project different images in two fixed directions.
透镜会把图像放大，这样就会像看大电视屏幕。
A lens would magnify the picture so it would be like looking at a large TV screen.
为了获取一个内焦距放大的图像，研究人员开动液压装置，改变透镜曲率，以协调方式改变检测器。
To achieve an in-focus and magnified image, the researchers actuate the hydraulics to change the curvatures of the lens and detector in a coordinated manner.
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