Wavelength shift correction system and wavelength shift correction method

A wavelength shift correction method for performing wavelength shift correction on a spectrometer to be subjected to wavelength shift correction, involving:

• a wavelength shift correction light source that emits wavelength shift correction light including a plurality of rays of wavelength shift correction emission-line light;
• and a spectrometer including a spectroscopic part that receives respective rays of dispersed spectral light obtained by dispersing incident light in accordance with wavelength with a plurality of photoelectric conversion elements arranged in a direction of dispersion, and outputs respective electrical signals corresponding to respective light intensities of the respective rays of dispersed spectral light, the spectrometer being the spectrometer to be subjected to wavelength shift correction,
• the wavelength shift correction method comprising:
• determining a wavelength shift correction time emission-line wavelength corresponding to reference wavelength shift correction emission-line light on a basis of respective electrical signals output from a plurality of photoelectric conversion elements that receive the plurality of rays of wavelength shift correction emission-line light when the wavelength shift correction light is measured as the incident light with the spectrometer to be subjected to wavelength shift correction, the reference wavelength shift correction emission-line light being set beforehand from the plurality of rays of wavelength shift correction emission-line light;
• and
• determining a wavelength variation from a difference between the determined wavelength shift correction time emission-line wavelength and a known emission-line wavelength of the reference wavelength shift correction emission line,
• wherein at least one of a plurality of photoelectric conversion elements that receive the plurality of rays of wavelength shift correction emission-line light receives a plurality of rays of wavelength shift correction emission-line light.