18-12-2018 Lamdamap Full Paper.pdf (399.31 kB)
Lensless low coherence interferometer fibre-deployed metrology for in-situ measurements
conference contribution
posted on 2019-07-05, 13:07 authored by Tom Hovell, Ranveer S. Matharu, Laura JusthamLaura Justham, Jon PetzingJon Petzing, Peter KinnellPeter KinnellThe need for increased geometric complexity and accuracy in manufactured parts
is being industrially driven by sectors such as automotive, aerospace, medical, and
energy generation. It is important to not only have traceable measurement systems
in place for component geometry and tolerance conformance verification, but also
to aid in the control of the material removal process in real-time on machine.
Low Coherence Interferometry (LCI) has been developed and primarily used in
the biomedical imaging domain for the past 20 years as Optical Coherence
Tomography (OCT). During this period, it has been shown to be a powerful
imaging modality with the ability to operate down to micrometre resolution for
depth measurements in non-ideal environments. However, literature defining the
effectiveness of lensless LCI/OCT systems operating outside of the biomedical
domain is more sparse. Furthermore, the impact of system component choice on
key output parameters has not been considered.
In this work, the characterisation of a lensless, fibre deployed LCI system in a
common path configuration is performed whilst varying system components.
Geometric measurements are demonstrated both in air and in water, with analysis
of the impact of system design and componentry on output performance metrics.
Relative and absolute traceability of results are produced from calibration grade
gauge blocks and Renishaw XL-80 calibration experiments to determine and
underpin metrological statements of operating characteristics of the system.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Laser Metrology and Performance XIII – LAMDAMAP 2019Citation
HOVELL, T. ... et al, 2019. Lensless low coherence interferometer fibre-deployed metrology for in-situ measurements. Presented at the 13th International Conference and Exhibition on Laser Metrology, Coordinate Measuring Machine and Machine Tool Performance (LAMDAMAP 2019), Sheffield, UK, 13-14 March 2019.Publisher
© euspen (European Society for Precision Engineering and Nanotechnology)Version
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2019-01-07Publication date
2019Notes
This is a conference paper.Publisher version
Language
- en