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Multiwavelength Holography: Height Measurements Despite Axial Motion of Several Wavelengths During Exposure

 
: Schiller, Annelie; Beckmann, Tobias; Fratz, Markus; Bertz, Alexander; Carl, Daniel; Buse, Karsten

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Fulltext urn:nbn:de:0011-n-5461639 (841 KByte PDF)
MD5 Fingerprint: afe5b6ef582ca10a66794be422051094
Created on: 28.5.2019


Optical Society of America -OSA-, Washington/D.C.:
Digital Holography and Three-Dimensional Imaging 2019 : Bordeaux, France, 19-23 May 2019
Washington, DC: OSA, 2019
ISBN: 978-1-943580-59-0
Paper Tu4B.3, 2 pp.
Conference "Digital Holography and Three-Dimensional Imaging" <13, 2019, Bordeaux>
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
13N14009; HoloMotion
Dynamisch-holographisches Messverfahren zur Erfassung metallischer Freiformflächen
English
Conference Paper, Electronic Publication
Fraunhofer IPM ()
multi-wavelength holography; digital holography; holographic interferometry; height measurement; nondestructive testing

Abstract
In a typical interferometer, axial motion of half a wavelength reduces the contrast to zero. Our setup compensates this component of motion utilizing a piezoelectric actuator, demonstrating heigth measurements despite axial motion of 14 wavelengths.

: http://publica.fraunhofer.de/documents/N-546163.html