The way I understand it: the SPD provides information about the distribution of light energy at each wavelength, while the detector result provides a single value that represents the total amount of light energy detected by the sensor. The SPD is used to calculate the detector result by integrating the SPD over the entire wavelength range of the detector.
The way I understand it: the SPD provides information about the distribution of light energy at each wavelength, while the detector result provides a single value that represents the total amount of light energy detected by the sensor. The SPD is used to calculate the detector result by integrating the SPD over the entire wavelength range of the detector.