Abstract
One of the urgent challenges of current laser material processing is the high quality and precise etching of transparent materials for, e.g., microoptical applications. Indirect laser processing techniques such as LIBWE and LESAL (laser-induced backside wet etching, laser etching at a surface adsorbed layer, respectively) allow the accurate etching of transparent materials like fused silica at low laser fluences, with etch rates in the nanometer scale and a low roughness. In combination with established laser processing techniques, e.g., mask projection, scanning contour mask technique, and direct writing, these etch techniques allow the direct machining of dielectric materials with almost optical quality. The etching of diffractive and refractive topographies for micro prism arrays, free-form surfaces, as well as periodically sub-micron structures with nanometer depth accuracy and a low roughness is demonstrated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.