C4.4 Monte-Carlo Analysis of Challenges and Limitations of Dispersion-based Optical Thermometry
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Sensors and Instrumentation
- C4 Temperature Measurement
- A. Röse, P. Köchert, G. Prellinger, F. Pollinger - Physikalisch-Technische Bundesanstalt, Braunschweig, (Germany), E. Manske - Ilmenau University of Technology, Ilmenau (Germany)
- 203 - 204
Using the dispersion models, it is possible to derive the effective temperature in an optical beam by the measurement of the optical path length at two well-known optical wavelengths. We are currently developing a gradient thermometer based on this principle, deploying multi-wavelength interferometry for the length measurement. This shall enable beam bending compensation in optical levelling of large structures. A Monte-Carlo investigation reveals practical obstacles and limitations of this promising temperature measurement approach.