Patent ID: 7791722

Claim:
A spectrophotometer comprising: a) a first optical system for delivering light from a light source to a sample; b) a light detector for detecting light from the sample; c) a second optical system for introducing the light from the sample to the light detector; d) a wavelength dispersion element provided in at least one of the first optical system and the second optical system; e) a driving unit for driving the wavelength dispersion element; f) a computational processor for sampling, at predetermined sampling intervals, a light detection signal from the light detector after a driving operation of the wavelength dispersion element by the driving unit is halted, for analog/digital (A/D) converting the sampled signal, and for performing a computational processing of the A/D converted signal; and g) a vibration convergence determiner for determining, based on a light detection signal processed by the computational processor, that a vibration generated in the wavelength dispersion element due to the driving operation is converged.