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Thermal pattern generation for infrared deflectometry

: Höfer, S.; Werling, Stefan; Beyerer, Jürgen

Volltext urn:nbn:de:0011-n-2566246 (438 KByte PDF)
MD5 Fingerprint: e9d3e60fc8f0d9bec7918110837885e7
Erstellt am: 15.7.2014

AMA Fachverband für Sensorik e.V., Wunstorf:
AMA Conferences 2013. Proceedings. With SENSOR, OPTO, IRS 2. CD-ROM : Nürnberg Exhibition Centre, Germany, 14. - 16.5.2013
Wunstorf: AMA Service, 2013
ISBN: 978-3-9813484-3-9
International Conference on Sensors and Measurement Technology (SENSOR) <16, 2013, Nuremberg>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IOSB ()
deflectometry; surface-slope-measurement; thermal-infrared; laser

Operating in the visible spectrum, the method of deflectometry provides reliable surface-slope measurements. We present the extension of the method to the thermal infrared (IR) spectrum, thus enabling the deflectometric inspection of rough surfaces and objects made of transparent and nonspecular materials. Since affordable technologies to create code patterns in the thermal IR do not exist, we propose a novel method to produce large-scale dynamic thermal patterns with the help of a powerful laser. In addition, we adapted coded pattern techniques to our setup and present the results of deflectometric measurements.