All Outputs (56)

Surface texture characterisation with reduced boundary effect for diamond-turned micro-structured surfaces (2022)
Journal Article

Micro-structured surfaces, fabricated by ultra-precision diamond turning (UPDT) with nanometric surface texture, have been widely used due to their wide range of functionalities. Their functional performance is closely related to their surface textur... Read More about Surface texture characterisation with reduced boundary effect for diamond-turned micro-structured surfaces.

Trinocular vision system for pose determination (2022)
Conference Proceeding

Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model (2022)
Conference Proceeding

Approximate and rigorous methods are widely used to model light scattering from a surface. The boundary element method (BEM) is a rigorous model that accounts for polarisation and multiple scattering effects. BEM is suitable to model the scattered li... Read More about Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model.

Smart optical coordinate and surface metrology (2022)
Journal Article

Manufacturing has recently experienced increased adoption of optimised and fast solutions for checking product quality during fabrication, allowing for manufacturing times and costs to be significantly reduced. Due to the integration of machine learn... Read More about Smart optical coordinate and surface metrology.

Improving the Positional Accuracy of Industrial Robots by Forward Kinematic Calibration using Laser Tracker System (2022)
Conference Proceeding

Precision object handling and manipulation require precise positioning of industrial robots. The common practice to perform end effector positioning is to use joint angle readings and industrial robot forward kinematics. However, forward kinematics o... Read More about Improving the Positional Accuracy of Industrial Robots by Forward Kinematic Calibration using Laser Tracker System.

Frequency scanning interferometry for accurate robot position measurement (2022)
Conference Proceeding

This paper presents a frequency scanning interferometry (FSI) shortwave infrared (IR) setup developed for position and orientation measurement of industrial robots. Within contemporary and future industrial frameworks, robots—in particular collaborat... Read More about Frequency scanning interferometry for accurate robot position measurement.

Optical metrology for digital manufacturing: a review (2022)
Journal Article

With the increasing adoption of Industry 4.0, optical metrology has experienced a significant boom in its implementation, as an ever-increasing number of manufacturing processes are overhauled for in-process measurement and control. As such, optical... Read More about Optical metrology for digital manufacturing: a review.

The Effect of Motion Blur on Photogrammetric Measurements of a Robotic Moving Target (2021)
Conference Proceeding

Generation and categorisation of surface texture data using a modified progressively growing adversarial network (2021)
Journal Article

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.

Finite element modelling of defects in additively manufactured strut-based lattice structures (2021)
Journal Article

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.

Automated assessment of measurement quality in optical coordinate metrology of complex freeform parts (2021)
Conference Proceeding

The measurement of complex freeform geometries represents a fundamental challenge for quality assurance in the production of high value-added parts, in particular when additive manufacturing technologies are involved. In addition, the increasing adva... Read More about Automated assessment of measurement quality in optical coordinate metrology of complex freeform parts.

General Expressions for the Quantum Fisher Information Matrix with Applications to Discrete Quantum Imaging (2021)
Journal Article

The quantum Fisher information matrix is a central object in multiparameter quantum estimation theory. It is usually challenging to obtain analytical expressions for it because most calculation methods rely on the diagonalization of the density matri... Read More about General Expressions for the Quantum Fisher Information Matrix with Applications to Discrete Quantum Imaging.

Characterisation of a multi-view fringe projection system based on the stereo matching of rectified phase maps (2021)
Journal Article

Multi-view fringe projection systems can be effective solutions to address the limitations imposed by the limited field of view, line-of-sight issues and occlusions when measuring the geometry of complex objects, associated with single camera-projec... Read More about Characterisation of a multi-view fringe projection system based on the stereo matching of rectified phase maps.

Laser triangulation (2020)
Book Chapter

This chapter gives a summary of laser triangulation as a measurement technique and outlines recent applications and challenges.

Real-time target alignment system for high-power high-repetition rate laser operations using a five degree-of-freedom hybrid mechanism (2020)
Journal Article

This paper presents a real-time position control solution for the targets used in the high-repetition rate laser operations of large-scale high-power laser facilities. The design of the control system is based on an Abbe-compliant, in-process positio... Read More about Real-time target alignment system for high-power high-repetition rate laser operations using a five degree-of-freedom hybrid mechanism.

Optimisation of camera positions for optical coordinate measurement based on visible point analysis (2020)
Journal Article

In optical coordinate measurement using cameras, the number of images, and positions and orientations of the cameras, are critical to object accessibility and the accuracy of a measurement. In this paper, we propose a technique to optimise the number... Read More about Optimisation of camera positions for optical coordinate measurement based on visible point analysis.

Measurement of complex freeform additively manufactured parts by structured light and photogrammetry (2020)
Journal Article

Volumetric error modelling of a stereo vision system for error correction in photogrammetric three-dimensional coordinate metrology (2020)
Journal Article

Optical three-dimensional coordinate measurement using stereo vision has systematic errors that affect measurement quality. This paper presents a scheme for measuring, modelling and correcting these errors. The position and orientation of a linear st... Read More about Volumetric error modelling of a stereo vision system for error correction in photogrammetric three-dimensional coordinate metrology.

Real-time target alignment system for high-power high-repetition rate laser operations using a five degree-of-freedom hybrid mechanism (2020)
Journal Article

This paper presents a real-time position control solution for the targets used in the high-repetition rate laser operations of high-power laser facilities. The control system is designed based on an Abbe-compliant, in-process position measurement sys... Read More about Real-time target alignment system for high-power high-repetition rate laser operations using a five degree-of-freedom hybrid mechanism.

Review of defects in lattice structures manufactured by powder bed fusion (2019)
Journal Article

Additively manufactured lattice structures are popular due to their desirable properties, such as high specific stiffness and high surface area, and are being explored for several applications including aerospace components, heat exchangers and biome... Read More about Review of defects in lattice structures manufactured by powder bed fusion.