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Measuring Small-Beam MFD: Overcoming the Challenges

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Small beams are used in many critical applications yet often they are not directly profiled. While obtaining good beam profiling data on beams under 10 µm has its challenges, they can be overcome with proven techniques.

DERRICK PETERMAN, PhD, OPHIR

Profiling beams under 10 µm in size is one of the more challenging beam profiling applications. There are numerous reasons for this, including the very small size. Focal plane arrays commonly used in beam profiling have pixel dimensions of 3 to 10 µm, which are too large to reasonably profile these small beams without magnification. Further complicating these measurements are the high mechanical precision of the beam profiling apparatus, as well as the beams’ high divergences and rapid expansion. These issues cause many organizations to “fly blind” on...Read full article

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