spectral range 

of a spectrometer
https://doi.org/10.1351/goldbook.08288
Wavelength range for which a spectrometer can be used.
Note:
Spectral range depends essentially on the radiation source, the optical components of the wavelength selector, and the detector.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 674 (https://doi.org/10.1515/pac-2019-0203)