Analytic design of a zoom XY-beam expander with freeform optical surfaces

Analytic design of a zoom XY-beam expander with freeform optical surfaces

Many laser applications require specific irradiance distributions to ensure optimal performance. In addition, some applications can benefit from time-varying distributions. In this work, we present the analytic design of a zoom XY-beam expander based on movable freeform optics that allows to simulta...

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Veröffentlicht in:Optics express 2015-11, Vol.23 (23), p.30438-30447
Hauptverfasser: Duerr, Fabian, Thienpont, Hugo
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Thienpont, Hugo
description Many laser applications require specific irradiance distributions to ensure optimal performance. In addition, some applications can benefit from time-varying distributions. In this work, we present the analytic design of a zoom XY-beam expander based on movable freeform optics that allows to simultaneously vary the magnification in x- and y-direction, respectively. This concept is not new: the new is to design and optimally exploit freeform lenses to achieve such an optical functionality. In comparison with zoom beam expanders that use combinations of rotated cylindrical lenses, a freeform system can be more compact, yet achieving excellent overall optical performance throughout the full zoom range.
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title Analytic design of a zoom XY-beam expander with freeform optical surfaces
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