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Visual inspection of transparent objects physical basics, existing methods and novel ideas

: Meyer, J.

Volltext urn:nbn:de:0011-n-3667476 (179 KByte PDF)
MD5 Fingerprint: 3401e46e2d7ce467df8298e46b39b00a
Erstellt am: 19.11.2015

Beyerer, Jürgen (Ed.); Pak, Alexey (Ed.):
Joint Workshop of Fraunhofer IOSB and Institute for Anthropomatics, Vision and Fusion Laboratory 2014. Proceedings : July, 20 to 26, 2014; Triberg-Nussbach in Germany
Karlsruhe: KIT Scientific Publishing, 2015 (Karlsruher Schriften zur Anthropomatik 20)
ISBN: 978-3-7315-0401-6
DOI: 10.5445/KSP/1000047712
Fraunhofer Institute of Optronics, System Technologies and Image Exploitation and Institute for Anthropomatics, Vision and Fusion Laboratory (Joint Workshop) <2014, Triberg-Nussbach>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IOSB ()

Various industries, e. g., manufacturers of optical components or medical equipment, use components made out of transparent materials to craft devices for high-precision applications. As this involves the need for fulfilling high quality assurances, any kind of defect like enclosed air bubbles, contaminants or cracks, has to be reliably detected. Much effort has been spent and is currently spent into developing methods suitable for visually inspecting transparent objects. In contrast to opaque objects, transparent materials pose various challenging problems, as any light ray involved in the inspection process can be reflected and refracted by the investigated sample, complicating the design of the setup and of the method used for the inspection. On the one hand, this report gives an introduction to the specific physical properties of interest of transparent objects. On the other hand, it provides an overview over existing methods used for capturing these properties and describes sketches of some novel inspection approaches.