Title: Investigation on distance measurement with chirped laser light
Language: English
Authors: Brandl, Matthias F. 
Qualification level: Diploma
Keywords: 3D Kamera; Abstandsmessung; Laser; Frequency-Shifted Feedback (FSF) Laser; AOM; Michelson Interferometer; Heterodyne Schwebung
3D Camera; Distance measurement; Laser; Frequency-Shifted Feedback (FSF) Laser; AOM; Michelson Interferometer; Heterodyne Beat
Advisor: Zimmermann, Horst
Assisting Advisor: Swoboda, Robert 
Issue Date: 2010
Number of Pages: 64
Qualification level: Diploma
In this thesis, interferometric distance measurements with chirped laser light from a frequency-shifted feedback laser are demonstrated. With this method, the length measurement process is converted into a frequency measurement process. Compared to other length measurement principles such as triangulation or time-of-flight measurement, interferometric methods usually have a better length resolution. With the full optical bandwidth, a length resolution of 0.2mm was achieved. Thereby each peak in the radio-frequency spectrum was resolved with only one test frequency. If a more time- and hardware-consuming measurement process were used, in which each peak is resolved with several test frequencies, the length resolution would be improved even further. Since this principle provides a high length resolution for small-area electronic circuits, it is an ideal candidate to build a sensor array for a three-dimensional camera.
URI: https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-41145
Library ID: AC07807883
Organisation: E354 - Institute of Electrodynamics, Microwave and Circuit Engineering 
Publication Type: Thesis
Appears in Collections:Thesis

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