Luminescence measurement device

The measuring device includes an, especially as a photo-multiplier formed, light detector (10), detecting a light incidenting on an aperture (36) of an input mask (18), and a positioning arrangement (14, 14') for the alignment of a test disk with respect to the input mask. The test disk includes a number of test chambers (20) which are preferably arranged in a matrix, and which comprises respectively an upper measuring aperture (24), whereby respectively one of the test chambers (20) is arrangement in a measuring position of the input mask aperture. A cross screening (42) engages with the test disk, aligns with the measuring aperture of the test chamber located in the measuring position, and separates it from the measuring apertures of the adjacent test chambers.