| 摘要 |
Apparatus for measuring the absorption of transparent samples (11, 31, 41) (e.g. precious stones) consisting of a radiation source (13, 43), a device (14, 44, 54) (e.g. Ulbricht sphere) for multiple reflection without a privileged direction, and a photometric measuring device (15d, 46) (e.g. diode row spectrometer), the sample (11, 31, 41) being arranged in the device (14, 44, 54) for multiple reflection without a privileged direction, or between it and the photometric measuring device (15d, 46), and being diffusely illuminated. …<IMAGE>… |
