| 摘要 |
PROBLEM TO BE SOLVED: To quantitatively measure the gloss caused by the surface properties of an object to be inspected such as hair, the skin, a fiber or cloth on the basis of the intensity of regularly reflected light and the intensity of irregularly reflected light. SOLUTION: When a regular reflection light source L1 and an irregular reflection light source L2 are successively allowed to light, the difference between the intensities of irradiation lights of the respective light sources L1, L2 is measured by the calibration light receiving element DC arranged at a measuring point P and, next, when an object to be inspected is placed at the measuring point and the light sources L1, L2 are successively allowed to light, the intensity of regularly reflected light and the intensity of irregularly reflected light are measured by the measuring light receiving element Dm arranged on the reflected light axis X3 of the irradiation light of the regular reflection light source L1 and, since the intensities of the respective reflected lights are corrected on the basis of the difference between them, a measuring error is not almost generated.
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