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Dr HELIA HOOSHMAND's Outputs (6)

Evaluating approximate and rigorous scattering models in virtual coherence scanning interferometry for improved surface topography measurement (2024)
Presentation / Conference Contribution
Hooshmand, H., Isa, M. A., Nikolaev, N., Piano, S., & Leach, R. (2024, August). Evaluating approximate and rigorous scattering models in virtual coherence scanning interferometry for improved surface topography measurement. Presented at Optical Manufacturing and Testing 2024, San Diego, USA

In optical metrology, the growing demand for accurate measurement technologies is driven by the increasing applications of three-dimensional (3D) microscopy and imaging. The advancement of these technologies relies on the modelling of the measurement... Read More about Evaluating approximate and rigorous scattering models in virtual coherence scanning interferometry for improved surface topography measurement.

Investigating the variation of particle distribution and surface texture of top surfaces based on build position in laser powder bed fusion (2024)
Presentation / Conference Contribution
Sithole, C., Hooshmand, H., Todhunter, L., Thompson, A., Hoekstra, S., Jalalian, A., Piano, S., & Gibson, I. (2024, May). Investigating the variation of particle distribution and surface texture of top surfaces based on build position in laser powder bed fusion. Presented at 7th CIRP Conference on Surface Integrity, Bremen, Germany

Quality analysis of additively manufactured (AM) surfaces is complex, yet critical for determining the functionality of parts and technology improvement. To accurately assess the quality of AM parts, it is necessary to consider the industrial applica... Read More about Investigating the variation of particle distribution and surface texture of top surfaces based on build position in laser powder bed fusion.

Comparison of approximate methods for modelling coherence scanning interferometry (2023)
Presentation / Conference Contribution
Hooshmand, H., Pahl, T., de Groot, P. J., Lehmann, P., Pappas, A., Su, R., Leach, R., & Piano, S. (2023, June). Comparison of approximate methods for modelling coherence scanning interferometry. Presented at Modeling Aspects in Optical Metrology IX, Munich, Germany

Coherence scanning interferometry (CSI) is a widely used optical method for surface topography measurement of industrial and biomedical surfaces. The operation of CSI can be modelled using approximate physics-based approaches with minimal computation... Read More about Comparison of approximate methods for modelling coherence scanning interferometry.

Comparison of coherence scanning interferometry, focus variation and confocal microscopy for surface topography measurement (2023)
Presentation / Conference Contribution
Hooshmand, H., Liu, M., Pappas, A., Thompson, A., Leach, R., & Piano, S. (2023, June). Comparison of coherence scanning interferometry, focus variation and confocal microscopy for surface topography measurement. Presented at Euspen’s 23rd International Conference & Exhibition, Copenhagen, Denmark

The most common optical technologies for surface topography measurement are coherence scanning interferometry (CSI), focus variation microscopy (FV) and imaging confocal microscopy (CM). Due to the benefits and drawbacks of each, these instruments ar... Read More about Comparison of coherence scanning interferometry, focus variation and confocal microscopy for surface topography measurement.

Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model (2022)
Presentation / Conference Contribution
Hooshmand, H., Liu, M., Leach, R., & Piano, S. (2022, August). Quantifying the validity conditions of the Beckmann-Kirchhoff scattering model. Presented at SPIE Optical Engineering + Applications 2022, San Diego, California, United States

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.