| 摘要 |
The invention relates to a bi-directional reflectance distribution measuring instrument (1) comprising a light source (3) illuminating a sample (2) at a pre-determinable elevation angle a, and a light receiver (4) which can be displaced in relation to the source and is used to receive the light from the sample. According to the invention, the light receiver comprises a plurality of receiver elements (4a, 4b) for the simultaneous detection of a wide coverage angle a', and at least the light source or the light receiver can be displaced about an axis (6) which is generally perpendicular to the sample. |
