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Optical Metrology Techniques Harness Structured Light Beams

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This approach holds promise for advancing laser remote sensing, fluid dynamics and profilometry.

CARMELO ROSALES-GUZMÁN, UNIVERSITY OF THE WITWATERSRAND; ANICETO BELMONTE, POLYTECHNIC UNIVERSITY OF CATALONIA; AND JUAN P. TORRES, ICFO-THE INSTITUTE OF PHOTONIC SCIENCES AND THE POLYTECHNIC UNIVERSITY OF CATALONIA

As a result of technological advances in recent years, researchers have at their disposal devices capable of tailoring — with almost unlimited freedom — the shape of beams of light. Computer-controlled spatial light modulators (SLMs) and digital micromirror devices (DMDs) are some of the most popular devices with such capabilities. They are invaluable tools in the generation of optical beams with a transverse varying phase structure, otherwise known as structured, sculpted or engineered fields. Two examples of these structured fields are Laguerre-Gauss and Hermite-Gauss beams. ...Read full article

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