Unified Optical Scanning Technology

Chapter 4.7 - Scanner Devices and Techniques: Low Inertia Scanning

4.7 LOW-INERTIA SCANNING

In contrast to the high-inertia devices discussed in all but Sections 4.5.1 and 4.5.4 (the galvanometer scanner and the fast-steering mirror), those considered further are cast firmly in the low-inertia domain. Recalling the anomaly of the resonant scanner having a low-inertia armature but operating functionally as a high-inertia device (Section 4.5.2) and so charted in Figure 4.1, the following techniques are truly low inertia in performance. They may be classed as "agile," capable of rendering rapid alteration of position, velocity, or direction to the scanned beam. Along with the more familiar acoustooptic (AO) and electrooptic (EO) devices (including prism gradient and digital binary) are techniques accorded more recent attention, identified in Figure 4.1 as microlens array and phased array.

 

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