| Zugriffsnummer | 38459 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Novel recording and calculation method for fast and simultaneous determination of the nonuniformity of blackbody radiators and of IR camera systems |
| Autor(in); Institution |
Gutschwager, Berndt; 7.3, Detektorradiometrie und Strahlungsthermometrie, PTB-Berlin
König, Sebastian; 7.3, Detektorradiometrie und Strahlungsthermometrie, PTB-Berlin
Hollandt, Jörg; 7.3, Detektorradiometrie und Strahlungsthermometrie, PTB-Berlin
|
| Quelle/Jahr | Temperatur 2017 : Fachtagung PTB Institut Berlin, 17./18. Mai 2017:(2017), 63 - 69 |
| Herausgeber(in) |
PTB Braunschweig und Berlin
|
| ISBN | 978-3-944659-04-6 |
| Verlag | Braunschweig [u.a.]: Physikalisch-Technische Bundesanstalt |
| Konferenzangaben | Fachtagung Temperatur 2017, Berlin, 17-18, Mai, 2017, Deutschland |
| Zusammenfassung | A novel method has been developed at PTB for the determination of the nonuniformity of imaging systems in a broad spectral range, using a radiation source whose distribution of the radiant intensity or of the radiance temperature is unknown or nonuniform with regard to is surface. This method can be applied quickly when using radiation sources with generally random areal distribution of the radiance or of the radiance temperature; however, it requires this distribution to be stable for a sufficient period of time during the imaging process. The method described here is based on the acquisition of several (at least three) images of a radiation source by means of an imaging system and with appropriate line and column shift of the images following the first one. The results of the investigation of the nonuniformity of the radiance distribution of the radiation source and the nonuniformity of the responsivity of the imaging system are provided subsequently by a computing algorithm which is adapted to the individual application. Hereby, the results can be stated as a relative change (a change that is proportional to the radiance) or as a change in the radiance temperature in IR camera systems and IR radiation sources. Industrial IR cameras for different spectral ranges and various commercial IR surface radiators are usually used to determine the nonuniformity of the intensity distribution or of the responsivity distribution of the instruments within a wide temperature range. We will present examples of practical results of this novel recording and calculation method. |
