Equipment for measurement and evaluation of hygroscopic fibrous materials such as paper or card, includes spectrometer and sensor measuring ambient conditions

摘要

Spectrometric equipment (10, 12) determines a spectrum from the material under investigation. This is complemented by a detection and evaluation unit (11) and at least one sensor detecting an ambient condition. The spectrometric unit is suitable for molecular spectroscopy. It operates in the: near, middle or far infra red. It is based on: nuclear resonance spectroscopy, fluorescence spectroscopy, Raman spectroscopy, terahertz pulsed imaging spectroscopy, ultra short time spectroscopy, laser spectroscopy or their combinations. An independent claim is included for the corresponding method.