Outputs (13)

Optical metrology for digital manufacturing: A review (2021)
Presentation / Conference Contribution
Catalucci, S., Thompson, A., Eastwood, J., Piano, S., Branson, D. T., & Leach, R. (2021, November). Optical metrology for digital manufacturing: A review. Presented at 3DMC, Online event

The so-called 4th Industrial Revolution is defined by the transformation of individual manufacturing activities into interconnected, highly efficient, flexible, and automated production flows. In this context, manufacturing processes are moving from... Read More about Optical metrology for digital manufacturing: A review.

The Effect of Motion Blur on Photogrammetric Measurements of a Robotic Moving Target (2021)
Presentation / Conference Contribution
Isa, M. A., Leach, R., Branson, D., & Piano, S. (2021, November). The Effect of Motion Blur on Photogrammetric Measurements of a Robotic Moving Target. Presented at 36th ASPE Annual Meeting, Minnesota, USA

Generation and categorisation of surface texture data using a modified progressively growing adversarial network (2021)
Journal Article
Eastwood, J., Newton, L., Leach, R., & Piano, S. (2022). Generation and categorisation of surface texture data using a modified progressively growing adversarial network. Precision Engineering, 74, 1-11. https://doi.org/10.1016/j.precisioneng.2021.10.020

As machine learning becomes more popular in the precision engineering sector, the need for large datasets of measurement data increases. Due to the often manual, user dependent and labour-intensive measurement processes, collecting a large amount of... Read More about Generation and categorisation of surface texture data using a modified progressively growing adversarial network.

Surface measuring coherence scanning interferometry beyond the specular reflection limit (2021)
Journal Article
Thomas, M., Su, R., de Groot, P., Coupland, J., & Leach, R. (2021). Surface measuring coherence scanning interferometry beyond the specular reflection limit. Optics Express, 29(22), 36121-36131. https://doi.org/10.1364/OE.435715

The capability of optical surface topography measurement methods for measurement of steep and tilted surfaces is investigated through modelling of a coherence scanning interferometer. Of particular interest is the effect on the interference signal an... Read More about Surface measuring coherence scanning interferometry beyond the specular reflection limit.

Development of a compact focus variation microscopy sensor for on-machine surface topography measurement (2021)
Journal Article
Santoso, T., Syam, W. P., Darukumalli, S., & Leach, R. (2022). Development of a compact focus variation microscopy sensor for on-machine surface topography measurement. Measurement, 187, Article 110311. https://doi.org/10.1016/j.measurement.2021.110311

On-machine areal surface topography measuring instruments are required for fast and accurate measurement of parts inside production machines without reducing production rates. This paper presents the design and development of a compact focus variatio... Read More about Development of a compact focus variation microscopy sensor for on-machine surface topography measurement.

Low thermal expansion machine frame designs using lattice structures (2021)
Journal Article
Juasiripukdee, P., Maskery, I., Ashcroft, I., & Leach, R. (2021). Low thermal expansion machine frame designs using lattice structures. Applied Sciences, 11(19), Article 9135. https://doi.org/10.3390/app11199135

In this work, we investigated tessellating cellular (or lattice) structures for use in a low thermal expansion machine frame. We proposed a concept for a lattice structure with tailorable effective coefficient of thermal expansion (CTE). The design i... Read More about Low thermal expansion machine frame designs using lattice structures.

Finite element modelling of defects in additively manufactured strut-based lattice structures (2021)
Journal Article
Echeta, I., Dutton, B., Leach, R. K., & Piano, S. (2021). Finite element modelling of defects in additively manufactured strut-based lattice structures. Additive Manufacturing, 47, Article 102301. https://doi.org/10.1016/j.addma.2021.102301

Strut-based lattice structures produced by powder bed fusion are prone to characteristic manufacturing defects that alter both their form and surface texture. Most studies in the literature focus on a subset of commonly observed defects, typically ra... Read More about Finite element modelling of defects in additively manufactured strut-based lattice structures.

Fourier optics modelling of coherence scanning interferometers (2021)
Presentation / Conference Contribution
de Groot, P. J., Colonna de Lega, X., Su, R., Coupland, J., & Leach, R. K. (2021, August). Fourier optics modelling of coherence scanning interferometers. Presented at Applied Optical Metrology IV, San Diego, United States

We propose an instrument model for coherence scanning interferometry using familiar Fourier optics methods, the spectrum of plane waves, and the assumption that the light source spectral bandwidth is the dominant factor in determining fringe contrast... Read More about Fourier optics modelling of coherence scanning interferometers.

Efficient empirical determination of maximum permissible error in coordinate metrology (2021)
Journal Article
Thompson, A., Southon, N., Fern, F., Stupfler, G., & Leach, R. (2021). Efficient empirical determination of maximum permissible error in coordinate metrology. Measurement Science and Technology, 32(10), Article 105013. https://doi.org/10.1088/1361-6501/ac0c49

Maximum permissible errors (MPEs) are an important measurement system specification and form the basis of periodic verification of a measurement system's performance. However, there is no standard methodology for determining MPEs, so when they are no... Read More about Efficient empirical determination of maximum permissible error in coordinate metrology.

Evaluating and propagating uncertainty in digital fringe projection systems (2021)
Presentation / Conference Contribution
Gayton, G., Isa, M., Su, R., & Leach, R. (2021, June). Evaluating and propagating uncertainty in digital fringe projection systems. Presented at Optical Measurement Systems for Industrial Inspection XII, Online Only, Germany

Fringe projection is a measurement technique able to produce high-density data measurements of Lambertian surfaces using a camera and projector. Evaluating the uncertainty of a fringe projection system is challenging because of the high-density and t... Read More about Evaluating and propagating uncertainty in digital fringe projection systems.