Reduction of measurement errors in OCT scanning

Morel, Eneas N.; Tabla, Pablo; Sallese, Marcelo; Torga, Jorge

doi:10.1117/12.2282108

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…The output beam is launched into an optical circulator coupler. At the end of the output arm of the circulator, the light beam is collimated in an optical head and focused on a housing system [41] which contains the reference surface and the sample. The beams reflected in the reference and in the sample are detected by a spectrometer (Ocean Optics HR4000) located on the third output of the circulator, in the usual spectral domain optical coherence tomography (SD-OCT) scheme.…”

Section: Methodsmentioning

confidence: 99%

Self-lubricating Cu-MWCNT coatings deposited from an ecofriendly glutamate-based electrolyte

Bengoa

Seré

Pary

et al. 2020

Surface and Coatings Technology

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Self-lubricating coatings have been studied for a long time due to their convenience compared to systems which need periodic lubrication. For this reason, Cu-CNT composite coatings with high wear resistance and low coefficient of friction were obtained by electrodeposition from an ecofriendly alkaline glutamate-based electrolyte. Deposition experiments were performed at various experimental conditions in the presence of lowfrequency ultrasound agitation to ensure particle dispersion and enhance their incorporation in the Cu matrix. Moreover, the effect of 2-Butyne-1,4-diol (an additive use in glutamate-based formulations) on coatings mechanical and tribological properties was assessed. Both pure Cu and Cu-CNT were obtained under all the experimental conditions considered and later characterized by SEM and XRD. Finally, pin-on disk tests were performed to estimate the coefficient of friction and determine the wear resistance. The results showed that incorporation of CNT to the copper matrix led to an improvement of the tribological performance of pure Cu, regardless of deposition parameters. Furthermore, it was found that 2-Butyne-1,4-diol had a strong influence on deposit microhardness and tribological performance, as a result of the changes in microstructure induced by this additive which promoted the development of a (111) texture. Likewise, the incorporation of particles to the Cu matrix promoted changes in surface morphology as well as in the preferred crystalline orientation, promoting crystal growth along the [311] direction. The results indicate that this simple and cheap methodology is suitable for fabrication of self-lubricating coatings.

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Section: Methodsmentioning

confidence: 99%

Self-lubricating Cu-MWCNT coatings deposited from an ecofriendly glutamate-based electrolyte

Bengoa

Seré

Pary

et al. 2020

Surface and Coatings Technology

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Optical coherence tomography measurement of capillary filling in porous silicon

Sallese¹,

Torga²,

Morel³

et al. 2020

Journal of Applied Physics

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The use of nanoporous structures with known morphology allows studying the properties of fluids in conditions of strong spatial confinement. Alternatively, the capillary filling of nanoporous structures with simple fluids provides information on their morphology. When a liquid enters the porous structure there is an increase in the optical path of the porous layer, and measuring this optical path as a function of position and time allows evaluating the filling dynamics of the pores. In this work, we determined the capillary filling dynamics of nanostructured porous silicon (PS) by optical coherence tomography. The high spatial resolution of this technique allows one not only to follow the position of the liquid front as a function of time but also to resolve in detail the filling fraction profile of the liquid front inside the PS matrix. Moreover, these profiles contain information about the pore size distribution in the PS structure. Therefore, we show how the determination and analysis of the filling fraction profile along the advancing liquid front can be used as a method to study the pore size distribution inside PS structures.

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Reduction of measurement errors in OCT scanning

Cited by 2 publications

References 7 publications

Self-lubricating Cu-MWCNT coatings deposited from an ecofriendly glutamate-based electrolyte

Self-lubricating Cu-MWCNT coatings deposited from an ecofriendly glutamate-based electrolyte

Optical coherence tomography measurement of capillary filling in porous silicon

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