Dr. Jürgen Hartmann is a professor for metrology and opto-thermal sensor technology at the University of Applied Sciences Würzburg –Schweinfurt (FHWS in Germany). He holds a diploma in physics and has worked for more than 25 years in the field of optical measurements, particularly in opto-thermal measurements of temperature and thermo-physical properties. He has developed new high-temperature measurement techniques for the application in photometry, radiometry and thermometry.