Yutai Beam expanders (also known as collimators or up-collimators) typically are used in systems with a long beam path to keep the beam collimated, or to vary the focus spot size for a given focusing lens. Various magnifications are available, but it is important to ensure that the input and output beams clear the apertures.
Beam expanders are useful in a variety of applications including interferometry, laser scanning and remote sensing.

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