Requirements for precision measurement in machine manufacturing regarding achievable resolution increased over years and are still increasing.

To realize a laser process observation through an F-Theta lens, usually a coaxial imaging path with a telephoto lens is used. Thereby the field of view moves across the scan area along the laser beam.

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During the last few years the performance of our computers has increased while their size has been reduced. But there is a physical limit on this development because quantum effects play a significant role on very small sized transistors.

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The thermal focus shift is typically a problem caused by optical glass lenses.

In general the rule in optics is that a large image sided NA means a small minimum spot size. So steeply focused, diffraction limited beams result in a very fine spot. Thus scan lenses with short focal lengths and large input beam diameters can achieve a smaller focus diameter than lenses with long focal lengths and small input beams.

Sill Optics presents the new zoom beam expander S6EXZ0940/574 which is suitable for high power UV lasers at 355 nm.

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UV lasers become increasingly popular among various domains in the laser industry.