A physics-based model for the interactions of optical scanning systems on surfaces to inform better instrument design and testing methods.

Optical scanners offer extremely rapid data capture compared with conventional contact probes, generating sometimes millions of points per second. However, a major draw-back of optical probing is that of degradation of signal or the introduction of systematic errors due the complex interaction of the light with the surface being scanned. Parameters such as material colour, roughness, transparency, specular reflectivity, angle of incidence of the light and others affect the quality of measurement.

The aim of this PhD project is to produce an appropriate physics-based model of this light-surface interaction, also informed by current work in computer graphics such as sub-surface scattering, to characterise its effects on optical scanning and use it to a) inform better instrument design or measurement procedures, and b) apply compensation (with uncertainties) to the data for systematic effects.

The Faculty Research Centre (FRC) in Manufacturing and Materials Engineering, builds on existing research strengths within the Faculty, integrating new research teams through investment and growth, and integrating seamlessly with the Advanced Manufacturing Research Centre. The FRC has an integrative approach to fabrication and manufacturing, focussing on the three strands of Materials, Processes, and Products, and is underpinned by our expertise in Metrology, Modelling, and Advanced Experimentation. Our aim is to be the research partner of choice for manufacturing industry through adding value, effecting knowledge transfer, generating intellectual property, and raising new technologies from concept up through the Manufacturing Readiness Levels.

Candidate specification

• A minimum of a 2:1 first degree in a relevant discipline/subject area with a minimum 60% mark in the Project element or equivalent with a minimum 60% overall module average.
• or in the event of a first degree classification of less than 2:1, a Masters Degree in a relevant subject area will be considered as an equivalent. The Masters must have been attained with overall marks at merit level (60%). In addition, the dissertation or equivalent element in the Masters must also have been attained with a mark at merit level (60%).
• the potential to engage in innovative research and to complete the PhD within a three-year period of study
• a minimum of English language proficiency (IELTS overall minimum score of 7.0 with a minimum of 6.5 in each component)

Award Details: Tuition Fees + Bursary £13863 per year (tax free)