Journal
OPTICS AND LASERS IN ENGINEERING
Volume 112, Issue -, Pages 59-67Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2018.09.002
Keywords
Laser beam shaping; Laser parallel beam processing; Spatial light modulator
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An imaging based beam shaping technique combined with parallel beam processing has been demonstrated. Binary and intensity masks have been designed and applied on phase only spatial light modulator (SLM) to shape the input laser beam in the desired profile and intensity distribution. A second SLM with a computer generated hologram(CGH) applied was used to split the incident picosecond laser beam. Hence, the laser beam was effectively converted to required target shape, intensity distribution and a separated pattern then reconstructed at the image plane of a focusing lens. The machined footprints on a polished Titanium (Ti6Al4V) substrate accurately match the desired beam in shape and depth distribution.
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