UKATC

The UK Astronomy Technology Centre is the national centre for astronomical technology. We design and build instruments for many of the world's major telescopes. We also project-manage UK and international collaborations. Our scientists carry out observational and theoretical research into fundamental questions such as the origins of planets and of galaxies.

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Browsing UKATC by Subject "Metrology"

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    3D dataset of the X-ray Computed Tomography and plugin graph results
    (2022-12) Chahid, Younes; Packer, Chris; Tawfik, Ahmed; Keen, Joel; Beardsley, Mat; Morris, Katherine; Bills, Paul; Blunt, Liam; Atkins, Carolyn; Tammas-Williams, S
    Part 1/2: The first half of the dataset is composed of the Avizo plugin, which can be found in the DOI http://dx.doi.org/10.5286/edata/900 Part 2/2: This second half of the dataset is composed of the X-ray computed tomography data used in the study and their outputs. 2.a is composed of the XCT region of interest (ROI) showing the individual micro drilled holes, previously measured in the SEM. 2.b contains the isolated cube ROI used in the porosity analysis. 2.c contains the plugin graph outputs for each hole, when using the Avizo plugin. The XCT data in 2.a and 2.b is a subvolume of the full scan of an additive manufactured flexure containing a reference pin with micro drilled holes, measured in the scanning electron microscope (SEM). The scan settings included a voltage of 145 kV, filament current of 41 µA, number of projections of 1650 and a voxel size of 8.5 µm × 8.5 µm × 8.5 µm. After reconstruction, the scan was converted from 32 bit to 8-bit, aligned to the CAD and resampled, resulting in a voxel size change to 9.4 µm × 9.4 µm × 8.8 µm. Detailed use of the XCT scan dataset and resulting plugin graphs can be found in the study titled "Development of a modular system to provide confidence in porosity analysis of additively manufactured components using X-ray computed tomography".
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    Multi Threshold Comparator Avizo Plugin
    (2022-12) Chahid, Younes; Packer, Chris; Tawfik, Ahmed; Keen, Joel; Beardsley, Mat; Morris, Katherine; Bills, Paul; Blunt, Liam; Atkins, Carolyn; Tammas-Williams, S
    Part 1/2: The Multi Threshold Comparator is an Avizo software plugin that assist users in choosing the threshold value when using X-ray Computed Tomography data for porosity analysis. The objective of the developed Avizo plugin is to compare multiple threshold types (Otsu, global and local) across a range of values, based on a previously measured hole, to eventually assist the user in choosing the suitable threshold value. The plugin .zip file is composed of the .pyscro and .rc files to be placed in Avizo installation folder. The hole data to be analysed needs to have a minimum of 2 slice images, and the orientation of the stack needs to show the diameter as circles. Further information can be found in the readme file and detailed use of the plugin is in the study titled "Development of a modular system to provide confidence in porosity analysis of additively manufactured components using X-ray computed tomography". Part 2/2: This second half of the dataset is composed of sample data used in the study and their outputs which can be found in DOI: http://dx.doi.org/10.5286/edata/901