course: Laser Metrology

number:
139930
teaching methods:
lecture with integrated tutorials
media:
computer based presentation, black board and chalk
responsible person:
Prof. Dr.-Ing. Andreas Ostendorf
lecturer:
Jun. Prof. Dr. rer. nat. Evgeny Gurevich (Maschinenbau)
language:
english
HWS:
4
CP:
6
offered in:
winter term

dates in winter term

  • lecture with integrated tutorials Thursdays: from 10:00 to 14.00 o'clock in ID 05/158

Exam

Oral

Date according to prior agreement with lecturer.

Duration: 30min
Exam registration: FlexNow

goals

The students have gained knowledge of the principles and opportunities in laser based measurement. They understand the difference between non-coherent and coherent light and how to make use of coherence in interferometry. Third they understand how the different laser measurement principles can be used to measure physical or mechanical parameters.

content

Based on the solution of Maxwell´s equations the description of electromechanical waves is derived. In this context the important parameters temporal and spatial coherence are defined. Next, Mach-Zehnder and Michelson interferometers are presented and analyzed. In the following recording and reconstruction of holograms is described. By merging the two technologies holographic interferometry is introduced especially for applications in mechanics to analyze oscillations and vibrations. Another important principle is Doppler measurements. After introducing the Doppler-principle and Doppler interferometers/vibrometers Laser Doppler Anemometry (LDA) is presented in more detail. An important chapter in this lecture is also the understanding of important detectors like photodiodes or photomultipliers.

requirements

none

recommended knowledge

  • Basic knowledge of physics, mathematics and engineering
  • Basics in electrical engineering

literature

  1. Kreis, Thomas "Handbook of Holographic Interferometry: Optical and Digital Methods", Wiley-VCH, 2004
  2. Yoshizawa, Toru "Handbook of Optical Metrology: Principles and Applications", CRC Press, 2009