Patent ID: 8535609
Filing Date: 2013-09-17
Classification: G01N

Abstract:
1. A test element for the analytical investigation of a liquid sample, comprising: a carrier film having an elongated, strip-shaped form, the carrier film comprising: a test field secured to the flat side of the first light guide layer, the test field constructed and arranged to receive a liquid sample, wherein liquid sample components penetrate into the test field, the test field comprising: wherein the entry surface couples in primary light in such a manner that the first light guide layer provides a first light guide section for the light path of the primary light coupled into the first light guide layer from the entry surface toward the detection zone, the first light guide section running inside the first light guide layer along the longitudinal dimension of the carrier film; and wherein the secondary light is reflected from the detection zone and into the second light guide layer, and the second light guide layer is constructed and arranged to provide a second light guide section for the light path of the secondary light away from the detection zone, the second light guide section running along the longitudinal dimension of the carrier film and adjacent to the first light guide section.