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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 6 — Apr. 8, 2010

In situ 24 kHz coherent imaging of morphology change in laser percussion drilling

Paul J.L. Webster, Joe X.Z. Yu, Ben Y.C. Leung, Mitchell D. Anderson, Victor X.D. Yang, and James M. Fraser  »View Author Affiliations


Optics Letters, Vol. 35, Issue 5, pp. 646-648 (2010)
http://dx.doi.org/10.1364/OL.35.000646


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Abstract

We observe sample morphology changes in real time ( 24 kHz ) during and between percussion drilling pulses by integrating a low-coherence microscope into a laser micromachining platform. Nonuniform cut speed and sidewall evolution in stainless steel are observed to strongly depend on assist gas. Interpulse morphology relaxation such as hole refill is directly imaged, showing dramatic differences in the material removal process dependent on pulse duration/peak power ( μ s 0.1 kW , ps 20 MW ) and material (steel, lead zirconate titanate PZT). Blind hole depth precision is improved by over 1 order of magnitude using in situ feedback from the imaging system.

© 2010 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(350.3850) Other areas of optics : Materials processing
(150.5495) Machine vision : Process monitoring and control

ToC Category:
Imaging Systems

History
Original Manuscript: August 5, 2009
Manuscript Accepted: November 13, 2009
Published: February 22, 2010

Virtual Issues
Vol. 5, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Paul J. L. Webster, Joe X. Z. Yu, Ben Y. C. Leung, Mitchell D. Anderson, Victor X. D. Yang, and James M. Fraser, "In situ 24 kHz coherent imaging of morphology change in laser percussion drilling," Opt. Lett. 35, 646-648 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-35-5-646

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