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Photonics Handbook®
A unique collection of technical design and applications articles, as well as technology primers presenting the basics of the photonics technology.
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ARTICLE OF THE HOUR Performance
Understanding the Rules
To make the right decisions and to ensure satisfactory performance in a positioning system, it is necessary to first have a grasp of performance parameters and an understanding of their definitions. Abbe Error — Linear off-axis errors introduced by angular deviations coupled to a moment arm at the point of interest on stage mounted devices (θ in Figure 1). The effect of Abbe error will appear as linear runout δx, but unlike true linear runout, it can be minimized by reducing...

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