Laser autofocusing: A sliding mode approach

Edin Golubovic; Islam S.M. Khalil; A. Kamadan; Asif Sabanovic

doi:10.1109/IECON.2010.5675122

Laser autofocusing: A sliding mode approach

Edin Golubovic^*, Islam S.M. Khalil, A. Kamadan, Asif Sabanovic

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

2 Citations (Scopus)

Abstract

Quality of the laser processing depends on many factors, such as overall configuration of the laser workstation, control methods used and quality of the laser beam. Although lasers used in material processing are typically high energy lasers, light beam still needs to be focused in order to achieve higher energy density and smaller final spot size. This paper presents an application of sliding mode to the laser autofocusing system. Autofocusing system consists of photodiode as the measurement element, focusing lens and pilot laser beam. Photodiode is saturated and measurement is done in the nonlinear region of the responsivity curve. Problem of limited knowledge about the photodiodes behavior in this region is solved through sliding mode minimization algorithm. Verification of the proposed method is done experimentally.

Original language	English
Title of host publication	Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	2396-2401
Number of pages	6
ISBN (Print)	978-1-4244-5225-5, 978-1-4244-5226-2 (CD)
DOIs	https://doi.org/10.1109/IECON.2010.5675122
Publication status	Published - 2010
Externally published	Yes
Event	36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010 - Glendale, AZ, United States Duration: 7 Nov 2010 → 10 Nov 2010 Conference number: 36

Publication series

Name	IECON Proceedings (Industrial Electronics Conference)
Publisher	IEEE
Volume	2010
ISSN (Print)	1553-572X
ISSN (Electronic)	1553-572X

Conference

Conference	36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010
Abbreviated title	IECON 2010
Country/Territory	United States
City	Glendale, AZ
Period	7/11/10 → 10/11/10

Keywords

n/a OA procedure

Access to Document

10.1109/IECON.2010.5675122

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@inproceedings{61a4136031d74f219a529d241effa3fa,

title = "Laser autofocusing: A sliding mode approach",

abstract = "Quality of the laser processing depends on many factors, such as overall configuration of the laser workstation, control methods used and quality of the laser beam. Although lasers used in material processing are typically high energy lasers, light beam still needs to be focused in order to achieve higher energy density and smaller final spot size. This paper presents an application of sliding mode to the laser autofocusing system. Autofocusing system consists of photodiode as the measurement element, focusing lens and pilot laser beam. Photodiode is saturated and measurement is done in the nonlinear region of the responsivity curve. Problem of limited knowledge about the photodiodes behavior in this region is solved through sliding mode minimization algorithm. Verification of the proposed method is done experimentally.",

keywords = "n/a OA procedure",

author = "Edin Golubovic and Khalil, {Islam S.M.} and A. Kamadan and Asif Sabanovic",

year = "2010",

doi = "10.1109/IECON.2010.5675122",

language = "English",

isbn = "978-1-4244-5225-5",

series = "IECON Proceedings (Industrial Electronics Conference)",

publisher = "IEEE",

pages = "2396--2401",

booktitle = "Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society",

address = "United States",

note = "36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010, IECON 2010 ; Conference date: 07-11-2010 Through 10-11-2010",

}

Golubovic, E, Khalil, ISM, Kamadan, A & Sabanovic, A 2010, Laser autofocusing: A sliding mode approach. in Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society., 5675122, IECON Proceedings (Industrial Electronics Conference), vol. 2010, IEEE, Piscataway, NJ, pp. 2396-2401, 36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010, Glendale, AZ, United States, 7/11/10. https://doi.org/10.1109/IECON.2010.5675122

Laser autofocusing: A sliding mode approach. / Golubovic, Edin; Khalil, Islam S.M.; Kamadan, A. et al.
Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society. Piscataway, NJ: IEEE, 2010. p. 2396-2401 5675122 (IECON Proceedings (Industrial Electronics Conference); Vol. 2010).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Laser autofocusing

T2 - 36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010

AU - Golubovic, Edin

AU - Khalil, Islam S.M.

AU - Kamadan, A.

AU - Sabanovic, Asif

N1 - Conference code: 36

PY - 2010

Y1 - 2010

N2 - Quality of the laser processing depends on many factors, such as overall configuration of the laser workstation, control methods used and quality of the laser beam. Although lasers used in material processing are typically high energy lasers, light beam still needs to be focused in order to achieve higher energy density and smaller final spot size. This paper presents an application of sliding mode to the laser autofocusing system. Autofocusing system consists of photodiode as the measurement element, focusing lens and pilot laser beam. Photodiode is saturated and measurement is done in the nonlinear region of the responsivity curve. Problem of limited knowledge about the photodiodes behavior in this region is solved through sliding mode minimization algorithm. Verification of the proposed method is done experimentally.

AB - Quality of the laser processing depends on many factors, such as overall configuration of the laser workstation, control methods used and quality of the laser beam. Although lasers used in material processing are typically high energy lasers, light beam still needs to be focused in order to achieve higher energy density and smaller final spot size. This paper presents an application of sliding mode to the laser autofocusing system. Autofocusing system consists of photodiode as the measurement element, focusing lens and pilot laser beam. Photodiode is saturated and measurement is done in the nonlinear region of the responsivity curve. Problem of limited knowledge about the photodiodes behavior in this region is solved through sliding mode minimization algorithm. Verification of the proposed method is done experimentally.

KW - n/a OA procedure

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U2 - 10.1109/IECON.2010.5675122

DO - 10.1109/IECON.2010.5675122

M3 - Conference contribution

AN - SCOPUS:78751525848

SN - 978-1-4244-5225-5

SN - 978-1-4244-5226-2 (CD)

T3 - IECON Proceedings (Industrial Electronics Conference)

SP - 2396

EP - 2401

BT - Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society

PB - IEEE

CY - Piscataway, NJ

Y2 - 7 November 2010 through 10 November 2010

ER -

Laser autofocusing: A sliding mode approach

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