F-Theta Distortion vs Field Curvature in Scan Lenses
F-theta distortion and field curvature are both field-dependent errors in a laser scan lens, but they fail in completely different ways. F-theta distortion is a…
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Day: September 1, 2026
F-Theta Lens Focal Length vs Scan Field
The relationship behind F theta lens focal length vs scan field is straightforward at first order: for an ideal F-theta mapping, the displacement of the…
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ZnSe vs ZnS Infrared Optics
Choose zinc selenide (ZnSe) when the optic sits in a CO2 laser beam or has to transmit past about 14 µm. Choose zinc sulfide (ZnS)…
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