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Proceedings Paper

Controlled USP laser ablation strategies for shaping optics
Author(s): Christian Schindler; Jan Giesecke; Jens Bliedtner; Hartmut Mueller; Sebastian Waechter; Volkmar Giggel
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Paper Abstract

Non-linear absorption and athermal ablation effects are two of the most attractive benefits of ultrashort pulsed (USP) laser radiation for optics manufacturing. The conventional generation of complex shapes still is a challenging problem for engineers and constrains the outcome of new products and applications in combination with aspheric and freeform optical shapes. To create a process chain for these shapes based on USP is the definition of task. We accomplished experiments with a 18W lasersystem (<15ps) and analysed ablation strategies beginning from selective to three dimensional removal on different optical materials. Therefore dependent variables like roughness (RMS), irregularities (IRR) in terms of shape accuracy and sub-surface damages (SSD) give suggestions for parametrical improvements. The aim is to substitute grinding procedures by creating path-time-controlled removal functions to achieve polishable surface quality.

Paper Details

Date Published: 9 May 2012
PDF: 6 pages
Proc. SPIE 8428, Micro-Optics 2012, 84281Z (9 May 2012); doi: 10.1117/12.970551
Show Author Affiliations
Christian Schindler, Fachhochschule Jena (Germany)
Jan Giesecke, Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH (Germany)
Jens Bliedtner, Fachhochschule Jena (Germany)
Hartmut Mueller, Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH (Germany)
Sebastian Waechter, Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH (Germany)
Volkmar Giggel, Carl Zeiss Jena GmbH (Germany)


Published in SPIE Proceedings Vol. 8428:
Micro-Optics 2012
Hugo Thienpont; Jürgen Mohr; Hans Zappe; Hirochika Nakajima, Editor(s)

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