Calibration, Characterization and Use of Array Spectroradiometers
|Publication Date:||1 January 2019|
This report is primarily concerned with measurements in the visible range of the electromagnetic spectrum, 360 nm to 830 nm, unless otherwise stated within the text.
It deals with common designs of array spectroradiometers in use at the time of writing. Hyper - spectral, multi-spectral and similar imaging devices are not specifically covered in this report except in a very general sense where the technologies overlap.
One of the key parts of an array spectroradiometer is the dispersive element in the spectral dispersing system. Most commonly this component will be a diffraction grating; however it is also possible to use other mechanisms such as a prism or an interference filter wedge. Due to the overwhelming predominance of a diffraction grating as the dispersive element in array spectroradiometers, this report will assume its use.
Hybrid scanning/array spectrographs are available and although these are mostly used in applications other than spectroradiometry there are some exceptions. If the grating moves or may be changed during use, these processes add an extra layer of complexity that is not covered by this report. This report will only cover array spectroradiometers with fixed gratings.