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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Rignanese, Gian-Marco |
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Quagliotti, Danilo
in Cooperation with on an Cooperation-Score of 37%
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Publications (10/10 displayed)
- 2024Surface roughness of the parts produced by Tomographic Volumetric Printing (TVP) process
- 2019Modelling the filling behavior of micro structured plastic optical components
- 2018Multiscale dimensional tolerance specifications established on shrinkage assessment in ceramic micro injection moldingcitations
- 2018Manufacturing Signatures of Injection Molding and Injection Compression Molding for Micro-Structured Polymer Fresnel Lens Productioncitations
- 2018Evaluation of injection pressure as a process fingerprint for Injection and Injection Compression Molding of micro structured optical components
- 2017Replication assessment of surface texture at sub-micrometre scale
- 2017Multi Scale Micro and Nano Metrology for Advanced Precision Moulding Technologies
- 2016An international comparison of surface texture parameters quantification on polymer artefacts using optical instrumentscitations
- 2016Metrology of sub-micron structured polymer surfaces
- 2016Performance verification of focus variation and confocal microscopes measuring tilted ultra-fine surfaces
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document
Performance verification of focus variation and confocal microscopes measuring tilted ultra-fine surfaces
Abstract
The behaviour of two optical instruments, scilicet a laser scanning confocal microscope and a focus-variation microscope, was investigated considering measurements of tilted surfaces. The measured samples were twelve steel artefacts for mould surface finish reference, covering Sa roughness parameter in the range (101—103) nm. The 3D surface texture parameters considered were Sa, Sq and Sdq. The small working distance of the confocal microscope objectives influenced the measurement setup, preventing from selecting a high tilting angle. The investigation was carried out comparing measurements of flat surfaces (0° tilt) with measurements of 12.5° tilted surfaces. The confocal microscope results showed a high sensitivity to tilting due to the laser beam reflection on the metal surfaces. The focus variation microscope results were more robust with respect to the considered angular variation, although they were out of the instrument operating range except for one of the twelve artefacts.