9 Light sources for non-medical use, namely, tunable light sources for quality control, industrial metrology, product characterization, product inspection, product sorting; scientific instrumentation, plasmonics, metamaterials, and optical characterization, in particular for spectroscopy and spectrophotometry; light sources for non-medical use, namely, a tunable filter for controlling the spectral properties of the output from a light source for quality control, industrial metrology, product characterization, product inspection, product sorting; scientific instrumentation, plasmonics, metamaterials, and optical characterization, in particular for spectroscopy and spectrophotometry; broadband light sources, supercontinuum light sources, lasers, laser amplifiers, lasers providing single-mode output and optical fiber based light sources; monitoring systems including light sources for non-medical use, in particular tunable light sources, and structural components thereof, for quality control, industrial metrology, product characterization, product inspection, product sorting; analysis systems including light sources for non-medical use, in particular tunable light sources, and structural components thereof, for scientific instrumentation, plasmonics, metamaterials, and optical characterization, in particular for spectroscopy and spectrophotometry; components for modifying and controlling the output of a light source, in particular filters for modifying the spectral properties of a broadband spectrum provided by a light source; detectors for detecting broadband light signals; Graphical User Interface (GUI) software for controlling a tunable light source, in particular a tunable broadband or supercontinuum light source; graphical user interface software for controlling the spectral filters of a tunable light source