Please use this identifier to cite or link to this item:
Publisher DOI: 10.1016/j.procir.2020.09.118
Title: Focus shift control of a novel 30 kW laser remote scanner for large-scale industrial sheet and plate metal applications
Language: English
Authors: Cerwenka, Georg 
Paternina, Jully 
Elhefnawy, Mohamed 
Wollnack, Jörg 
Emmelmann, Claus 
Keywords: 30 kW Laser Remote Scanner; Ambient Condition; Cutting; End Effect; Focus Shift; Fused Silica; Real-time; Stress-optical; Thermo-optical; Welding
Issue Date: 15-Sep-2020
Publisher: Elsevier
Source: Procedia CIRP (94): 817-822 (2020)
Abstract (english): 
To overcome current limitations in laser remote processing of large-scale sheet and plate metal applications, an automated laser remote scanner (LRS) with a 30 kW laser power has been developed. Due to the high laser power, an unacceptable focus shift occurs at the processing location, mainly generated by the fused silica optics. A computationally efficient real-time focus shift compensation and control of the focus position have been investigated and are presented. In the first section, the 30 kW LRS concept is briefly introduced. Section two explains the focus shift effect and presents its impact on manufacturing scenarios in welding and cutting. The third section highlights significant effects accounted for: thermo-optical, stress-optical, geometric, and ambient. A set of simulated data of temperature, refractive index, and focus shift profiles have been generated in section four and model the performance of the 30 kW LRS. The results are discussed and a summary is given.
Conference: 11th CIRP Conference on Photonic Technologies, LANE 2020 
DOI: 10.15480/882.3046
ISSN: 2212-8271
Journal: Procedia CIRP 
Institute: Laser- und Anlagensystemtechnik T-2 
Produktionsmanagement und -technik M-18 
Document Type: Chapter/Article (Proceedings)
More Funding information: This research was kindly funded by the German Federal Ministry for Economic Affairs and Energy (BMWi) after a decision of the Deutsche Bundestag within the framework of the research proectj “QuInLas” and “ShipLight”.
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Appears in Collections:Publications with fulltext

Files in This Item:
File Description SizeFormat
1-s2.0-S2212827120313056-main.pdfVerlags-PDF1,11 MBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Dec 1, 2022


checked on Dec 1, 2022

Google ScholarTM


Note about this record

Cite this record


This item is licensed under a Creative Commons License Creative Commons