In-process monitoring techniques for laser cleaning

Lee, J.M.; Watkins, K. G.

doi:10.1016/s0143-8166(00)00073-7

Cited by 57 publications

(27 citation statements)

References 17 publications

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“…Accordingly acoustic emission can be monitored by microphone as shown in Fig. 1, and this is applied to characterize the laser shock cleaning process quantitatively [7,8].…”

Section: Article In Pressmentioning

confidence: 99%

Acoustic emission monitoring during laser shock cleaning of silicon wafers

Kim¹,

Lee²,

Cho³

et al. 2005

Optics and Lasers in Engineering

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“…Accordingly acoustic emission can be monitored by microphone as shown in Fig. 1, and this is applied to characterize the laser shock cleaning process quantitatively [7,8].…”

Section: Article In Pressmentioning

confidence: 99%

Acoustic emission monitoring during laser shock cleaning of silicon wafers

Kim¹,

Lee²,

Cho³

et al. 2005

Optics and Lasers in Engineering

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“…7,8 Conventional cleaning methods are based on mechanical or chemical techniques, such as high-pressure gas or solid particle jets ͑e.g., sandblasting͒, scrubbing, ultrasonics, and wet chemical flux or poulticing. 9,10 Recently, pulsed laser radiation has been adopted as a promising cleaning procedure for many ornamental materials 11,12 including marble sculptures and artworks. [13][14][15] Laser-assisted marble cleaning uses the differential absorbance of dark encrustations and the underlying marble substratum for near-infrared ͑NIR͒ laser radiation.…”

Section: Introductionmentioning

confidence: 99%

Role of marble microstructure in near-infrared laser-induced damage during laser cleaning

Rodríguez-Navarro

Rodríguez‐Navarro

Elert

et al. 2004

Journal of Applied Physics

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When marble is cleaned by nanosecond neodymium yttrium-aluminum-garnet lasers ͑1064 nm͒, strongly absorbing surface contaminants are removed at fluences substantially below the damage threshold for the much less absorptive marble substrate. Recent studies have shown, however, that unacceptable roughening of the marble surface also may occur at low fluences due to removal of individual grains. In order to elucidate this effect, we have compared the low-fluence response of marbles with two different grain sizes and single-crystal calcite, in the fluence range 0.12-1.25 J cm Ϫ2 . Damage was greater in fine-grained than coarse-grained marble, and did not occur in the single-crystal calcite at these fluences. The temperature rise following defect-mediated absorption triggers thermal plasma emission and generates shock waves; the concomitant surface damage depends on the size and crystallographic orientation of the crystals. Laser irradiation anneals the defects and increases ''crystallite size.'' The implications for the laser-assisted cleaning of marble artworks are outlined.

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“…Laser cleaning utilises the versatile, controllable, selective and environmentally friendly nature of the laser system to optimum effect [1,2]. Its effect can be highly localised allowing specific areas of contamination to be targeted.…”

Section: Introductionmentioning

confidence: 99%