Real-time focus controller for laser welding with fibre-optic non-invasive capture of light

A. Cobo, F. Bardin, D. P. Hand, J. D C Jones, O. Collin, P. Aubry, T. Dubois, M. Högström, P. Nylen, P. Jonsson, J. M. López-Higuera

Research output: Contribution to journalArticle

Abstract

Laser welding is being introduced in the aerospace industry due to its many advantages over traditional techniques. However, welding of parts with complex shapes requires precise control of the focal point of the laser in order to achieve full penetration over the entire seam. In this paper, we present an improved control system for real-time adjustment of the correct focal position, which is based on the monitoring of the light emitted by the process in two different spectral bands. The reported system has been optimized for use in a real environment: it is robust, compact, easy to operate, able to adjust itself to different welding conditions, materials and laser setups, and includes a direct connection to an external PC. Results from recent field trials on complex aerospace structures are provided.

Original languageEnglish
Pages (from-to)548-551
Number of pages4
JournalProceedings of SPIE - the International Society for Optical Engineering
Volume5502
DOIs
Publication statusPublished - 2004
EventSecond European Workshop on Optical Fibre Sensors, EWOFS'04 - Santander, Spain
Duration: 9 Jun 200411 Jun 2004

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laser welding
welding
fiber optics
controllers
aerospace industry
spectral bands
lasers
penetration
adjusting

Keywords

  • Autofocus
  • Chromatic aberration
  • Focus control
  • Laser welding
  • Optical fibre
  • Optical sensor

Cite this

Cobo, A. ; Bardin, F. ; Hand, D. P. ; Jones, J. D C ; Collin, O. ; Aubry, P. ; Dubois, T. ; Högström, M. ; Nylen, P. ; Jonsson, P. ; López-Higuera, J. M. / Real-time focus controller for laser welding with fibre-optic non-invasive capture of light. In: Proceedings of SPIE - the International Society for Optical Engineering. 2004 ; Vol. 5502. pp. 548-551.
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abstract = "Laser welding is being introduced in the aerospace industry due to its many advantages over traditional techniques. However, welding of parts with complex shapes requires precise control of the focal point of the laser in order to achieve full penetration over the entire seam. In this paper, we present an improved control system for real-time adjustment of the correct focal position, which is based on the monitoring of the light emitted by the process in two different spectral bands. The reported system has been optimized for use in a real environment: it is robust, compact, easy to operate, able to adjust itself to different welding conditions, materials and laser setups, and includes a direct connection to an external PC. Results from recent field trials on complex aerospace structures are provided.",
keywords = "Autofocus, Chromatic aberration, Focus control, Laser welding, Optical fibre, Optical sensor",
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Cobo, A, Bardin, F, Hand, DP, Jones, JDC, Collin, O, Aubry, P, Dubois, T, Högström, M, Nylen, P, Jonsson, P & López-Higuera, JM 2004, 'Real-time focus controller for laser welding with fibre-optic non-invasive capture of light', Proceedings of SPIE - the International Society for Optical Engineering, vol. 5502, pp. 548-551. https://doi.org/10.1117/12.566709

Real-time focus controller for laser welding with fibre-optic non-invasive capture of light. / Cobo, A.; Bardin, F.; Hand, D. P.; Jones, J. D C; Collin, O.; Aubry, P.; Dubois, T.; Högström, M.; Nylen, P.; Jonsson, P.; López-Higuera, J. M.

In: Proceedings of SPIE - the International Society for Optical Engineering, Vol. 5502, 2004, p. 548-551.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Real-time focus controller for laser welding with fibre-optic non-invasive capture of light

AU - Cobo, A.

AU - Bardin, F.

AU - Hand, D. P.

AU - Jones, J. D C

AU - Collin, O.

AU - Aubry, P.

AU - Dubois, T.

AU - Högström, M.

AU - Nylen, P.

AU - Jonsson, P.

AU - López-Higuera, J. M.

PY - 2004

Y1 - 2004

N2 - Laser welding is being introduced in the aerospace industry due to its many advantages over traditional techniques. However, welding of parts with complex shapes requires precise control of the focal point of the laser in order to achieve full penetration over the entire seam. In this paper, we present an improved control system for real-time adjustment of the correct focal position, which is based on the monitoring of the light emitted by the process in two different spectral bands. The reported system has been optimized for use in a real environment: it is robust, compact, easy to operate, able to adjust itself to different welding conditions, materials and laser setups, and includes a direct connection to an external PC. Results from recent field trials on complex aerospace structures are provided.

AB - Laser welding is being introduced in the aerospace industry due to its many advantages over traditional techniques. However, welding of parts with complex shapes requires precise control of the focal point of the laser in order to achieve full penetration over the entire seam. In this paper, we present an improved control system for real-time adjustment of the correct focal position, which is based on the monitoring of the light emitted by the process in two different spectral bands. The reported system has been optimized for use in a real environment: it is robust, compact, easy to operate, able to adjust itself to different welding conditions, materials and laser setups, and includes a direct connection to an external PC. Results from recent field trials on complex aerospace structures are provided.

KW - Autofocus

KW - Chromatic aberration

KW - Focus control

KW - Laser welding

KW - Optical fibre

KW - Optical sensor

U2 - 10.1117/12.566709

DO - 10.1117/12.566709

M3 - Article

VL - 5502

SP - 548

EP - 551

JO - Proceedings of SPIE - the International Society for Optical Engineering

JF - Proceedings of SPIE - the International Society for Optical Engineering

SN - 1996-756X

ER -