Patent ID: 8107075

Claim:
An optical characteristic measuring apparatus for measuring optical characteristics of a measurement target, the optical characteristic measuring apparatus comprising: an optical system including first and second carrier retarders formed by irrotational high-order retardation plates and having retardations being known and differing from each other, the optical system causing light including a predetermined band component to be incident on the measurement target through a first polarizer and the first carrier retarder and causing the light modulated by the measurement target to be incident on light-receiving/spectroscopic means through the second carrier retarder and a second polarizer; and calculation means for performing a spectrum extraction process of extracting a plurality of spectral peaks from a frequency spectrum obtained by analyzing a light intensity signal detected by the light-receiving/spectroscopic means, and an optical characteristic element calculation process of calculating an optical characteristic element representing the optical characteristics of the measurement target based on the spectral peaks and the retardations of the first and second carrier retarders.