Patent AT-E40008-T1: [Translated] DEVICE FOR MEASUREMENT OF FLUORESCENCE, TUBACITY, LUMINESCENCE OR ABSORPTION.

The invention is concerned with equipment by means of which it is possible to measure the fluorescence, luminescence, turbidity, and absorption of a liquid sample. The sample is placed in a cylindrical cuvette provided with a transparent bottom. The light is passed into the cuvette by means of optical fibres along the centre axis of the cuvette. The equipment additionally includes an optical system whose optical axis coincides with the centre axis of the cuvette, as well as a light detector. It is an essential feature of the equipment that a substantially equal proportion of the light departing from each volume element of the sample is collected for detection, by means of the total reflection from the walls of the cuvette, through the optical system to the light detector, and that the optical system also collimates the light passed into the cuvette.