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Cover Image, Volume 10, Issue 2
Publication year - 2019
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12359
Subject(s) - materials science , extrusion , optical microscope , tapering , profilometer , composite material , optics , scanning electron microscope , diamond , volume (thermodynamics) , die swell , microscope , surface finish , physics , computer science , computer graphics (images) , quantum mechanics
Geometrical tolerance of extruded glass tubes is an important parameter for applications such as mass spectrometry. Glass flow effects during extrusion such as die swell and tapering can affect the tolerances along the length of extruded tubes. These effects are evaluated via measurements of the internal and external diameter of the extruded tubes using both optical profilometry and microscopy. The figure shows cross‐sectional images of precision manufactured glass tubes, from which diameter measurements are taken. The top figures are optical microscope images and the bottom figures are optical profiler images, whereas the left figures demonstrate measurements on cleaved samples and the figures on the right demonstrate samples which have been cut with a diamond saw. High precision extrusion of glass, tubes , Kalnins et al. DOI: 10.1111/ijag.13092 .