| 摘要 |
PURPOSE:To perform two reflection measurements without changing the positions of a light source and a light detector, by providing four windows in the same plane including an optical axis in an integrating sphere, with one window as a light inputting window, another window as a light emitting window, and the remaining two windows as sample windows. CONSTITUTION:In an integrating sphere, four windows Wi, Wo, Ws1, and Ws2 are provided. In the case of Ro/d measurement, a sample S is placed at the window Ws1 facing the light inputting window Wi. A white plate Sw is placed on the other sample window Ws2. Then, the light, which is inputted from the light inputting window Wi, is directly inputted to the sample S in the vertical direction. The component of the light reflected by the mirror surface of the sample S is emitted out of the integrating sphere through the light inputting window Wi. Only the diffused component of the reflected light repeats the reflection in the integrating sphere and is inputted to a light detector D through the light emitting window Wo. In the case of Rd/o measurement, the white plate Sw is placed at the sample window Ws1, and the sample S is paced at the sample window Ws2 facing the light emitting window Wo. |
