@inproceedings{VollmerMoellmann2011, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {IR Imaging of CO~2: Basics, Experiments, and Potential Industrial Applications}, series = {In: Sensor + Test Conferences 2011 : N{\"u}rnberg Exhibition Centre, Germany, 7. - 9.6.2011 ; [including] SENSOR 2011, 15th International Conference on Sensors and Measurement Technology, OPTO 2011, photonic metrology, 10th International Conference on Optical Technologies for Sensing and Measurement, IRS2 2011, 12th International Conference on Infrared Sensors \& Systems ; short proceedings / AMA Fachverband f{\"u}r Sensorik e.V. - Wunstorf/Germany : AMA Service GmbH, 2011. - ISBN 978-3-9810993-8-6}, booktitle = {In: Sensor + Test Conferences 2011 : N{\"u}rnberg Exhibition Centre, Germany, 7. - 9.6.2011 ; [including] SENSOR 2011, 15th International Conference on Sensors and Measurement Technology, OPTO 2011, photonic metrology, 10th International Conference on Optical Technologies for Sensing and Measurement, IRS2 2011, 12th International Conference on Infrared Sensors \& Systems ; short proceedings / AMA Fachverband f{\"u}r Sensorik e.V. - Wunstorf/Germany : AMA Service GmbH, 2011. - ISBN 978-3-9810993-8-6}, pages = {240}, year = {2011}, language = {en} } @inproceedings{MoellmannLooseLutzetal.2003, author = {M{\"o}llmann, Klaus-Peter and Loose, Harald and Lutz, Norbert and Pinno, Frank}, title = {Emissionsgradkompensierte Temperaturmessung an hochreflektierenden Leichtmetalloberflachen}, series = {In: Temperatur 2003 : [Verfahren und Ger{\"a}te in der Temperatur- und Feuchtemesstechnik] ; Tagung Berlin, 8. und 9. September 2003 / VDI-VDE-Gesellschaft Mess- und Automatisierungstechnik. - D{\"u}sseldorf : VDI-Verl., 2003. - (VDI-Berichte , ISSN 0083-5560 ; 1784). - ISBN 3-18-091784-9}, booktitle = {In: Temperatur 2003 : [Verfahren und Ger{\"a}te in der Temperatur- und Feuchtemesstechnik] ; Tagung Berlin, 8. und 9. September 2003 / VDI-VDE-Gesellschaft Mess- und Automatisierungstechnik. - D{\"u}sseldorf : VDI-Verl., 2003. - (VDI-Berichte , ISSN 0083-5560 ; 1784). - ISBN 3-18-091784-9}, pages = {179 -- 186}, year = {2003}, language = {de} } @article{SchmidtMoellmannMuilwijketal.2002, author = {Schmidt, V. and M{\"o}llmann, Klaus-Peter and Muilwijk, F. and Kalz, S. and Stoppiglia, H.}, title = {Radiation thermometry on aluminium}, series = {In: Aluminium : international journal for industry, research and application 78(2002), 897-901}, journal = {In: Aluminium : international journal for industry, research and application 78(2002), 897-901}, issn = {0002-6689}, pages = {897 -- 901}, year = {2002}, language = {en} } @inproceedings{SchmidtMoellmannMuilwijketal.2002, author = {Schmidt, V. and M{\"o}llmann, Klaus-Peter and Muilwijk, F. and Stoppiglia, H.}, title = {Radiation thermometry on aluminium}, series = {In: Proc. of the ALUMEX Conference, Dubai, December 10 - 12, 2002}, booktitle = {In: Proc. of the ALUMEX Conference, Dubai, December 10 - 12, 2002}, year = {2002}, language = {en} } @article{HerrmanAuthMoellmannetal.1993, author = {Herrman, K. H. and Auth, J. and M{\"o}llmann, Klaus Peter and Tomm, J. W. and Bottner, H. and Lambrecht, A. and Tacke, M. and Kolesnikov, V. and Yunovich, A. E. and Fedorenko, A. I. and Mironov, O. A. and Sipatov, A. Yu}, title = {Band offsets in Eu-containing lead chalcogenides and lead chalcogenide superlattices from spectroscopic data}, series = {In: Semiconductor Science and Technology Vol. 8 (1993) 1S, pp S176-S179}, journal = {In: Semiconductor Science and Technology Vol. 8 (1993) 1S, pp S176-S179}, issn = {1361-6641}, doi = {10.1088/0268-1242/8/1S/040}, pages = {S176 -- S179}, year = {1993}, abstract = {The results of an experimental study of the optical and photoelectrical properties of Eu-containing lead chalcogenides and superlattices are presented. From both sets of experiments band offset data for the lead chalcogenide-europium chalcogenide heterojunction are derived. The results are compared with the data obtained from a linear interpolation of the band structures between those of the binaries.}, language = {en} } @article{GaertnerKlattLooseetal.2004, author = {G{\"a}rtner, R. and Klatt, P. and Loose, Harald and Lutz, Norbert and M{\"o}llmann, Klaus-Peter and Pinno, Frank and Muilwijk, F. and Kalz, S. and Stoppiglia, H.}, title = {New Aluminium Radiation Thermometry}, series = {In: Aluminium : international journal for industry, research and application Vol. 80 (2004), S. 642-647}, journal = {In: Aluminium : international journal for industry, research and application Vol. 80 (2004), S. 642-647}, issn = {0002-6689}, pages = {642 -- 647}, year = {2004}, language = {en} } @inproceedings{OgwuHellwigDohertyetal.2005, author = {Ogwu, Abraham and Hellwig, Thomas and Doherty, Saul and Haddow, David and M{\"o}llmann, Klaus-Peter and Placido, Frank}, title = {Surface characterisation and surface measurements on Boron Phosphide films prepared by PECVD}, series = {In: Window and dome technologies and materials IX : 28 - 29 March 2005, Orlando, Florida, USA ; [held as part of the SPIE Defense \& Security Symposium] / sponsored and publ. by SPIE, the International Society for Optical Engineering. Cooperating organizations: Ball Aerospace \& Technologies Corporation (USA) ... Randal W. Tustison, chair/ed. - Bellingham, Wash. : SPIE, 2005. - (Proceedings // SPIE, International Society for Optical Engineering : P, ISSN 0038-7355 ; 5786). - ISBN 0-8194-5771-X}, booktitle = {In: Window and dome technologies and materials IX : 28 - 29 March 2005, Orlando, Florida, USA ; [held as part of the SPIE Defense \& Security Symposium] / sponsored and publ. by SPIE, the International Society for Optical Engineering. Cooperating organizations: Ball Aerospace \& Technologies Corporation (USA) ... Randal W. Tustison, chair/ed. - Bellingham, Wash. : SPIE, 2005. - (Proceedings // SPIE, International Society for Optical Engineering : P, ISSN 0038-7355 ; 5786). - ISBN 0-8194-5771-X}, pages = {130 -- 136}, year = {2005}, language = {en} } @article{VollmerMoellmannSchlichting2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter and Schlichting, Hans Joachim}, title = {Double pane windows—elastic deformations, gas thermodynamics, thermal and optical phenomena}, series = {In: European Journal of Physics 35 (2014) 4, 045023}, journal = {In: European Journal of Physics 35 (2014) 4, 045023}, doi = {10.1088/0143-0807/35/4/045023}, year = {2014}, abstract = {Double pane windows are common objects which can enrich physics teaching at undergraduate level at least in five different fields. First, having sealed inner spaces filled with gas, one can discuss gas law problems upon changes of pressure and/or temperature. Second, when discussing temperature differences between inside and outside, one needs to take into account the associated heat transfer mechanisms which define the pane temperatures, enclosing the gas. Third, using elastic properties of the glass, one may treat deformations of the window panes upon those changes or additional manually applied external pressure. Fourth, the reflective properties of glass combined with the pane deformations result in concave or convex mirrors, which when illuminated by the Sun, may lead to focal points on projection areas such as facing houses. Fifth, such areas receive an increased irradiance which leads to associated thermal effects. Starting from the most obvious daily life phenomenon, the fascinating caustics of reflected sunlight on streets or walls, all of these double pane window phenomena are investigated experimentally as well as theoretically.}, language = {en} } @article{VollmerMoellmann2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Schnelles Verblassen leuchtender Spuren}, series = {In: Physik in unserer Zeit 45 (2014) 5, 252-253}, journal = {In: Physik in unserer Zeit 45 (2014) 5, 252-253}, doi = {10.1002/piuz.201490088}, pages = {252 -- 253}, year = {2014}, abstract = {Wohl jeder, der schon einmal mit Physik zu tun hatte, kennt die meist gr{\"u}nlichen Leuchtspuren von Oszillographen. Sie erm{\"o}glichen es, zeitabh{\"a}ngige Signale zu visualisieren und quantitativ auszumessen, insbesondere auch dann, wenn die Ph{\"a}nomene sehr schnell ablaufen. Die Reaktionsdynamik der leuchtenden Phosphore auf den Bildschirmen wird mit Hochgeschwindigkeits-Videos deutlich sichtbar.}, language = {de} } @article{VollmerMoellmann2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Wenn es knallt und kracht}, series = {In: Physik in unserer Zeit 45 (2014) 3, 148-149}, journal = {In: Physik in unserer Zeit 45 (2014) 3, 148-149}, doi = {10.1002/piuz.201490046}, pages = {148 -- 149}, year = {2014}, abstract = {An die Knallgasprobe erinnert sich wohl noch jeder aus dem Chemieunterricht. Die Zeitskala, auf der Wasserstoff und Sauerstoff reagieren h{\"a}ngt davon ab, ob die beiden Reaktionsgase zu Beginn getrennt oder gemischt vorliegen. Dies zeigt sich deutlich in Hochgeschwindigkeits-Aufnahmen von Experimenten, bei denen Luftballons entweder mit reinem Wasserstoff oder aber mit Knallgas gef{\"u}llt werden.}, language = {de} } @article{VollmerMoellmann2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Achtung Solarofen : Kaustiken von Hochhausverglasungen}, series = {In: Physik in unserer Zeit 45 (2014) 3, 134-139}, journal = {In: Physik in unserer Zeit 45 (2014) 3, 134-139}, doi = {10.1002/piuz.201401360}, pages = {134 -- 139}, year = {2014}, abstract = {Konkav gew{\"o}lbte Glasfassaden von Großbauten k{\"o}nnen bei ung{\"u}nstiger Orientierung zur Sonne zum Brennspiegel werden. Unfreiwillig ber{\"u}hmt gewordene Beispiele sind das Vdara-Hotel in Las Vegas und das "Walkie-Talkie"-Hochhaus in London. Dieser Effekt tritt auch nur an bestimmten Tagen bei passendem Sonnenstand auf. Da die Fassaden keine perfekten Parabolspiegel sind, produzieren sie keinen scharfen Brennpunkt, sondern aufgeweitete Brennflecke, sogenannte Kaustiken. Trotzdem k{\"o}nnen dort hohe Bestrahlungsst{\"a}rken auftreten. Simulationen und Experimente mit Modellen best{\"a}tigen dies.}, language = {de} } @article{VollmerMoellmann2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Das farbenpr{\"a}chtige Glitzern frischen Schnees}, series = {In: Physik in unserer Zeit 45 (2014) 2, 97-98}, journal = {In: Physik in unserer Zeit 45 (2014) 2, 97-98}, doi = {10.1002/piuz.201490031}, pages = {97 -- 98}, year = {2014}, abstract = {Regenb{\"o}gen, Halos, Koronen, Himmelsfarben - es gibt eine Vielzahl farbenpr{\"a}chtiger Ph{\"a}nomene in der Natur, verursacht durch Reflexion, Brechung oder allgemein gesprochen durch Streuung des Lichts an Wassertropfen, Eiskristallen oder Aerosolen. Das farbige Glitzern einer Schneeschicht scheint zun{\"a}chst anderer Natur zu sein, l{\"a}sst sich aber auf analoge Weise erkl{\"a}ren.}, language = {de} } @article{VollmerMoellmann2014, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Physikalische Zauberei : die Kette im Ring}, series = {In: Physik in unserer Zeit 45 (2014) 1, 44-45}, journal = {In: Physik in unserer Zeit 45 (2014) 1, 44-45}, doi = {10.1002/piuz.201490004}, pages = {44 -- 45}, year = {2014}, abstract = {Ein einfacher physikalischer Zaubertrick besteht darin, eine Kette {\"u}ber den Handr{\"u}cken zu legen und danach von unten einen Ring {\"u}ber die Kette zu schieben. Der Ring kann entweder von der zweiten Hand oder der die Kette haltenden Hand gehalten werden. Er wird sodann losgelassen und soll (mit einem Knoten) in der Kette h{\"a}ngen bleiben.}, language = {de} } @inproceedings{PinnoMoellmannVollmer2013, author = {Pinno, Frank and M{\"o}llmann, Klaus-Peter and Vollmer, Michael}, title = {Moisture detection at building walls using evaporative cooling}, series = {In: InfraMation proceedings. - Vol. 14 (2013)}, booktitle = {In: InfraMation proceedings. - Vol. 14 (2013)}, year = {2013}, language = {en} } @inproceedings{MoellmannVollmer2013, author = {M{\"o}llmann, Klaus-Peter and Vollmer, Michael}, title = {Einfache Charakterisierung der zeitlichen und r{\"a}umlichen Aufl{\"o}sung von W{\"a}rmebildkameras}, series = {In: Temperatur 2013 : Fachtagung ; PTB Institut Berlin, 5./6. Juni 2013 ; [Verfahren und Ger{\"a}te in der Temperatur- und Feuchtemesstechnik ; Tagungsband] / [Hrsg.: Physikalisch-Technische Bundesanstalt, Braunschweig und Berlin]. Fachl. Mittr{\"a}ger: VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA), Fachgebiet 2.50: Temperatur und Feuchte. - Braunschweig [u.a.] : Physikalisch-Techn. Bundesanst., 2013. - ISBN 3-9810021-8-0}, booktitle = {In: Temperatur 2013 : Fachtagung ; PTB Institut Berlin, 5./6. Juni 2013 ; [Verfahren und Ger{\"a}te in der Temperatur- und Feuchtemesstechnik ; Tagungsband] / [Hrsg.: Physikalisch-Technische Bundesanstalt, Braunschweig und Berlin]. Fachl. Mittr{\"a}ger: VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA), Fachgebiet 2.50: Temperatur und Feuchte. - Braunschweig [u.a.] : Physikalisch-Techn. Bundesanst., 2013. - ISBN 3-9810021-8-0}, pages = {137 -- 142}, year = {2013}, language = {de} } @inproceedings{VollmerMoellmann2013, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {The magic of the invisible: using IR imaging in physics education}, series = {In: InfraMation proceedings / Infrared Training Center. - Vol. 14 (2013)}, booktitle = {In: InfraMation proceedings / Infrared Training Center. - Vol. 14 (2013)}, year = {2013}, language = {en} } @article{VollmerMoellmann2013, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {Characterization of IR cameras in student labs}, series = {In: European journal of physics 34 (2013) 6,}, journal = {In: European journal of physics 34 (2013) 6,}, doi = {doi:10.1088/0143-0807/34/6/S73}, pages = {S73 -- S90}, year = {2013}, abstract = {The content of a student lab course is described which deals with characterization of the most important parameters governing the performance of infrared cameras. In detail, the parameters describing the temperature resolution, spatial resolution and time resolution of commercial IR cameras are analysed using simple lab experiments. Understanding the respective performance of the system is the prerequisite for applying infrared thermal imaging to quantitative measurements in physics and technology.}, language = {en} } @article{MoellmannVollmer2013, author = {M{\"o}llmann, Klaus-Peter and Vollmer, Michael}, title = {Fourier transform infrared spectroscopy in physics laboratory courses}, series = {In: European journal of physics 34 (2013) 6, S123-S137}, journal = {In: European journal of physics 34 (2013) 6, S123-S137}, doi = {doi:10.1088/0143-0807/34/6/S123}, pages = {S123 -- S137}, year = {2013}, abstract = {nfrared spectrometry is one of the most important tools in the field of spectroscopic analysis. This is due to the high information content of spectra in the so-called spectroscopic fingerprint region, which enables measurement not only of gases, but also of liquids and solids. Today, infrared spectroscopy is almost completely dominated by Fourier transform infrared (FTIR) spectroscopy. FTIR spectroscopy is able to detect minute quantities in the ppm and ppb ranges, and the respective analyses are now standard tools in science as well as industry. Therefore FTIR spectroscopy should be taught within the standard curriculum at university to physicists and engineers. Here we present respective undergraduate laboratory experiments designed for students at the end of their third year. Experiments deal first with understanding the spectrometer and second with recording and analysing spectra. On the one hand, transmission spectra of gases are treated which relate to environmental analytics (being probably the most prominent and well-known examples), and on the other hand, the focus is on the transmission and reflection spectra of solids. In particular, silicon wafers are studied—as is regularly done in the microelectronics industry—in order to characterize their thickness, oxygen content and phonon modes.}, language = {en} } @article{VollmerMoellmann2013, author = {Vollmer, Michael and M{\"o}llmann, Klaus-Peter}, title = {James Bond und die zerplatzenden Christbaumkugeln}, series = {Physik in unserer Zeit 44 (2013) 6, 304-306}, journal = {Physik in unserer Zeit 44 (2013) 6, 304-306}, doi = {10.1002/piuz.201390109}, pages = {304 -- 306}, year = {2013}, abstract = {Rohe Eier oder wassergef{\"u}llte Christbaumkugeln platzen beim Eindringen des Projektils einer Luftpistole. Dieser Vorgang l{\"a}sst sich einfach durch die sehr geringe Kompressibilit{\"a}t des Wassers und eine damit verbundene starke Druckerh{\"o}hung erkl{\"a}ren (Physik in unserer Zeit 2013, 44(5), 251). Eine genaue Analyse aller Vorg{\"a}nge sollte aber auch Fragen beantworten wie: Spielen vorhandene Luftblasen in der Fl{\"u}ssigkeit eine Rolle? Wie lange dauert es bis zum Aufplatzen, und muss die wassergef{\"u}llte Kugel eigentlich fest verschlossen sein?}, language = {de} } @article{GrossmannMoellmannVollmer2015, author = {Großmann, Michael and M{\"o}llmann, Klaus-Peter and Vollmer, Michael}, title = {Artificially generated halos: rotating sample crystals around various axes}, series = {Appield Optics 54 (2015) 4, B97-B106}, journal = {Appield Optics 54 (2015) 4, B97-B106}, doi = {10.1364/AO.54.000B97}, pages = {B97 -- B106}, year = {2015}, abstract = {Abstract So far experiments with artificial halos from single transparent crystals have suffered from the lack of apparatus that allows simultaneous rotation around two and three axes. A new setup is presented which overcomes these restrictions by combining electrical as well as pneumatic concepts. This enables reproducible experiments of the most common halos observed in nature and for the first time artificial ring halos from single hexagons rotating around three axes simultaneously. In addition, an old qualitative halo demonstration based on perceived colors of rotating colored areas whose contours represent scattering plots has been reinvestigated and the usually nonsaturated color of artificial parhelia was visualized using a crossed prism method. These new experiments are discussed in the context of all known artificial halo experiments. © 2014 Optical Society of America}, language = {en} }