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Outputs (26)

Effects of defocus on the transfer function of coherence scanning interferometry (2017)
Journal Article
Su, R., Thomas, M., Leach, R., & Coupland, J. (2017). Effects of defocus on the transfer function of coherence scanning interferometry. Optics Letters, 43(1), https://doi.org/10.1364/OL.43.000082

Coherence scanning interferometry (CSI) offers three dimensional (3D) measurement of surface topography with high precision and accuracy. Defocus within the interferometric objective lens, however, is commonly present in CSI measurements, and reduces... Read More about Effects of defocus on the transfer function of coherence scanning interferometry.

Feature-based characterisation of signature topography in laser powder bed fusion of metals (2017)
Journal Article
Senin, N., Thompson, A., & Leach, R. K. (2018). Feature-based characterisation of signature topography in laser powder bed fusion of metals. Measurement Science and Technology, 29(4), Article 045009. https://doi.org/10.1088/1361-6501/aa9e19

The use of state-of-the-art areal topography measurement instrumentation allows for a high level of detail in the acquisition of topographic information at micrometric scales. The three-dimensional geometric models of surface topography obtained from... Read More about Feature-based characterisation of signature topography in laser powder bed fusion of metals.

Development of mathematically-defined surfaces (2017)
Presentation / Conference Contribution
Todhunter, L. D., Leach, R., Lawes, S., Harris, P., & Blateyron, F. (2017, October). Development of mathematically-defined surfaces. Presented at Postgraduate Institute Conference 2017

New software has been developed that enables the creation of areal surface topography representations. The goal of this software package is to utilise the mathematically-defined surface representations in the development of surface texture parameter... Read More about Development of mathematically-defined surfaces.

Flexible decoupled camera and projector fringe projection system using inertial sensors (2017)
Journal Article
Stavroulakis, P., Sims-Waterhouse, D., Piano, S., & Leach, R. K. (in press). Flexible decoupled camera and projector fringe projection system using inertial sensors. Optical Engineering, 56(10), https://doi.org/10.1117/1.OE.56.10.104106

Measurement of objects with complex geometry and many self occlusions is increasingly important in many fields, including additive manufacturing. In a fringe projection system, the camera and the projector cannot move independently with respect to ea... Read More about Flexible decoupled camera and projector fringe projection system using inertial sensors.

Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry (2017)
Presentation / Conference Contribution
Gómez, C. A., Su, R., Thompson, A., DiSciacca, J., Lawes, S., & Leach, R. K. Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry. Presented at Joint Special Interest Group meeting between euspen and ASPE Dimensional Accuracy and Surface Finish in Additive Manufacturing

The surface topography of metal additive manufactured (AM) parts can be challenging to measure due to the presence of complex features, such as high slopes, step like recesses and protuberances, and local variations in reflectance. Recent innovations... Read More about Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry.

Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing (2017)
Presentation / Conference Contribution
Xu, Z., Hyde, C. J., Thompson, A., Leach, R. K., Maskery, I., Tuck, C., & Clare, A. T. Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing. Presented at Joint Special Interest Group meeting between euspen and ASPE Dimensional Accuracy and Surface Finish in Additive Manufacturing

The mechanical performance of additively manufactured (AM) components remains an issue, limiting the implementation of AM technologies. In this work, a new method is presented, to examine the evolution of defects in an Inconel 718 two-bar test specim... Read More about Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing.

True-color 3D surface metrology for additive manufacturing using interference microscopy (2017)
Presentation / Conference Contribution
DiSciacca, J., Gomez, C., Thompson, A., Lawes, S., Leach, R., Colonna de Lega, X., & de Groot, P. True-color 3D surface metrology for additive manufacturing using interference microscopy. Presented at Joint Special Interest Group meeting between euspen and ASPE Dimensional Accuracy and Surface Finish in Additive Manufacturing

Coherence scanning interferometry (CSI) is widely used for surface topography characterisation. With the ability to measure both rough surfaces with the high slopes and optical finishes, CSI has made contibutions in fields from industrial machining t... Read More about True-color 3D surface metrology for additive manufacturing using interference microscopy.