Patent ID: 6088117
Filing Date: 2000-07-11
Classification: G01J,G01N

Abstract:
A reflection characteristic measuring apparatus comprising:an integrating sphere formed with an illumination aperture, a sample aperture, and a reception aperture;an illuminator which supplies illumination light into the integrating sphere through the illumination aperture;a light receptor which receives light reflected from a sample placed at the sample aperture through the reception aperture to generate light reception data;an apparent reflectance calculator which calculates an apparent reflectance of the sample based on the generated light reception data;a storage unit which stores coefficients for rendering a linear combination of an apparent reflectance and N-th power (N is 2 or more integer) of the apparent reflectance closer to a true reflectance of the sample under a given illumination condition; anda true reflectance calculator which calculates a true reflectance of the sample under the given illumination condition by multiplying the terms of the linear combination of an apparent reflectance and N-th power (N is 2 or more integer) of the apparent reflectance by the coefficients stored in the storage unit, respectively.