The essential components of a spectroradiometric system are as follows:
*Input optics that gather the electromagnetic radiation from the source (Diffusers, Lenses, Fiber optic light guides)
*An entrance slit, determines how much light will enter the spectrometer. A smaller slit with have greater resolution, but less overall sensitivity
*Order sorting filters for reduction of second-order effects
*Collimator directs the light to the Grating or prism
*A grating or prism for dispersion of the light
*Focusing optics to align the light onto the Detector
*A detector, CMOS sensor or CCD array
*A control and logging system to define data and store it.