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Abstract

A laser manufacturing system including a spatial light modulator (SLM) with a rectangular array of electrically actuated two-dimensional (2D) diffractors arranged to form multiple pixels spaced linearly along a long-axis thereof, each pixel including a plurality of 2D diffractors electrically ganged together and arranged along a short-axis perpendicular to the long-axis. The system further includes a laser and optics to illuminate the SLM, and projection optics to project modulated light from the SLM onto a surface of a workpiece to form an anamorphic image of the SLM that is demagnified along the long-axis of the SLM and tightly focused along the short-axis to form a condensed line beam to mark the workpiece. The line beam has a sinc² profile along the short-axis and a top-hat along the long-axis. Demagnification and the resulting long-axis length at the workpiece is chosen based on the pulse-energy of the laser and targeted peak fluence.

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First Claim