Patent ID: 7688429
Filing Date: 2010-03-30
Classification: G01N

Abstract:
1. Device ( 1 ) for the analysis or absorption measurement of a small quantity of a liquid medium ( 2 ) using light ( 3 ), which is guided through the medium ( 2 ) and then can be detected or analyzed photometrically, spectrophotometrically, fluorometrically, or spectrofluorometrically, wherein the device ( 1 ) comprises a receiving point ( 4 ) area at a top thereof for depositing or applying the medium ( 2 ) in drops, a light inlet ( 5 ) oriented horizontally and located underneath the receiving point ( 4 ) in a housing ( 6 ), and a first device ( 7 ) located downstream of the light inlet ( 5 ) and defining a beam path for guiding the light received by the light inlet ( 5 ) upwards towards the receiving point ( 4 ), the device ( 1 ) has a reflector ( 8 ), which is attached detachably above the receiving point ( 4 ) opposite from the beam path extending from the light inlet; the reflector ( 8 ) has a defined spacing from the receiving point ( 4 ), which is filled or can be filled by the medium ( 2 ) at least in an area aligned with the beam path of the first device ( 7 ); and a second device ( 9 ) is provided for guiding the light coming from the reflector ( 8 ) towards a detector, a light guide or light-guiding fiber bundle ( 10 ) is arranged for guiding the light towards the receiving point ( 4 ) from the first device ( 7 ) and a light guide or a fiber bundle ( 11 ) for guiding the light coming from the reflector ( 8 ) and the sample is arranged between the receiving point ( 4 ) and the second device ( 9 ), optics ( 12 ) comprising at least one convergent lens, which bundles the light and which is coupled optically with at least one of the light guide for guiding the light towards the receiving point ( 4 ) or the light guide for guiding the light coming from the reflector ( 8 ), is provided underneath the receiving point ( 4 ) for the medium ( 2 ), and the receiving point ( 4 ) is an area recess on the toy side of the device ( 1 ) underneath the reflector ( 8 ) and is formed by a boundary of the optics ( 12 ) facing the receiving point, wherein the boundary of the optics ( 12 ) is recessed relative to a toy side ( 13 ) of a holder for the optics ( 12 ).