SPECTROMETRIC INSTRUMENT

PROBLEM TO BE SOLVED: To attain low power consumption and a long life in a light source, while suppressing deterioration in measurement precision in a colorimeter, and also to improve measurement precision in a spectroscopic analyzer.SOLUTION: A spectrometric instrument includes: a light source 30; a light source drive part 10 including a power control part 12 for controlling the drive power of the light source; a measurement optical system 40 including a spectroscopic part 34 for dispersing light in accordance with each wavelength; a light reception part 50 (50') for receiving reflection light or transmission light from a sample 32 (32') being a measurement object, which passes through the measurement optical system, and converting the light into an electric signal; and a measurement part 60 for measuring light reception intensity corresponding to the wavelength of the light, based on the electric signal to be obtained from the light reception part. The power control part 12 changes power to be applied to the light source by association with the wavelength of the light in accordance with at least one among the spectroscopic characteristic of the light source, the spectroscopic characteristic of the measurement optical system, and the light reception sensitivity characteristic of the light reception part.