Method and apparatus for analyzing a dry-chemical test element

US7760346B2 · kind B2 · utility

Assignee

• Roche Diagnostics Operations, Inc. · US

Inventors

• Carlo Effenhauser · Weinheim, DE
• Erich Haendler · Lampertheim, DE
• Norbert Oranth · Vaterstetten, DE

Key dates

• Filing date: Sep 9, 2008
• Grant date: Jul 20, 2010
• Expiry date: Jan 20, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/8483
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method and an apparatus for analyzing a dry-chemical test element, in particular an immunological test element, wherein, in the method, a dry-chemical test element is analyzed by optical scanning, whereby measurement light beams leaving assay regions of the test element, which are loaded with one or more immobilized optically active substances, with a respective measurement light intensity are detected by a detector device. The method comprises the following steps: during the optical scanning of a first assay region, from which the measurement light beams leave with a first measurement light intensity, a first quantity of light from measurement light beams which impinges on the detector device and a working range of the detector device are adapted to one another by selecting scanning parameters according to a first set of scanning parameters, and during the optical scanning of a second assay region, from which the measurement light beams leave with a second measurement light intensity which differs from the first measurement light intensity, a second quantity of light from measurement light beams which impinges on the detector device and the working range…