| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to extremely easily and highly accurately correct a wavelength deviation caused between a plurality of optical density meters using a multiple wavelength spectroscope, without requiring additional equipment such as a light source for calibration.SOLUTION: In a correction method for an optical density meter, which corrects a wavelength deviation caused between a plurality of optical density meters 1a to 1e using a multiple wavelength spectroscope, a common band pass filter 20 is arranged on the optical path of the multiple wavelength spectroscope in each of the optical density meters 1a to 1e, and the spectral transmittances Da to De of the band pass filter are measured. Also, the wavelength deviations &Dgr;Wa to &Dgr;We between the center wavelengths λa to λe indicated by the corresponding spectral transmittance data Da to De measured using the common band pass filter 20 are corrected for the corresponding optical density meters 1a to 1e. |
