Study of manufacturing and measurement reproducibility on a laser textured structured surface

Abstract

The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractIn recent years there has been increasing interest in the use of structured surfaces to provide specific functional performance. Such surfaces often consist of localised micro scale surface features with predetermined geometries. The performance of the feature manufacturing process affects the functional performance of the surface, and can be assessed by measurement of the resulting surface features. Measurement of the resulting micro manufactured surface features necessitates use of areal optical surface topography instruments. However, conventional characterisation methods, based on areal surface texture parameters, often prove inadequate, and may fail to capture the relevant geometric properties needed for an effective dimensional verification. This paper investigates an alternative route to verification, based on the determination of geometric attributes of the micro fabricated features. This approach allows for direct assessment of manufacturing process performance, by comparison of the geometric attributes with their nominal values. An example application is shown in which a micromachining process (laser texturing) is used to fabricate a periodic pattern of dimples, which provide a low friction bearing surface. In this paper, manufacturing process performance is assessed by characterisation of the diameter and out of roundness. Sources of uncertainty associated with these geometric parameters are also considered.

A method for inspecting near-right-angle V-groove surfaces based on dual-probe wavelength scanning interferometry

“…The features in the measurement results are extracted by an image segmentation algorithm such as Sobel operator and watershed transformation [19,20]. By matching the features correspondingly to the reference result, the relationship between the coordinate systems of the two probes and the coordinate system of the reference topography can be determined.…”

Surface topography acquisition method for double-sided near-right-angle structured surfaces based on dual-probe wavelength scanning interferometry

“…more than four pairs (since three equations can be obtained with each pair of feature points), the matrices will be able to be determined. The feature points can be extracted with an image processing algorithm from the measurement results by WLSI (Taylor Hobson CCI 3000), SEM and DPWSI respectively with the edge extraction method described in [16,17] such as Sobel operator and Watershed. The spike errors, like batwing, might be a problem so a cluster filter is used to remove the outliers before the extraction.…”

Systematic Repeatability Analysis of Nanosecond Pulsed Laser Texturing

“…Sophisticated surface texturing and micro-machining approaches have been developed to achieve highly regular surface morphology, including laser machining [5], photolithography [6], photopolymerization [7] and nano-imprinting [8]. Although reference is frequently made to repeatability as a strength of these techniques [9,10], few works have been dedicated to systematic and quantitative study of this parameter [11].…”