Apparatus for optoelectronic evaluation of test strips

US4509859A · kind A · utility

Inventors

• Ernst Markart · Munich, DE
• Reinhard Blumel · Puchheim, DE
• Holger Alfons Eggert · Bogen, DE

Key dates

• Filing date: Mar 22, 1982
• Grant date: Apr 9, 1985
• Expiry date: Mar 22, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/474
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Test apparatus for the optoelectronic evaluation of test paper strips such as are used, for example, for determining the blood sugar level, which apparatus may be calibrated in a simple and accurate manner. For dark calibration, there is provided in a position opposite the light source and the photosensor a reflector having a black reflector surface, with the space for receiving the test paper strip - as determined by the holding means - being located between the light source and the photosensor on the one hand and the reflector on the other hand. There are provided accuracy-improving means for the test paper-dependent calibration of the evaluation and display means and a bar code reader comprising a channel for passing therethrough a bar code strip, a light source for illuminating the bar code strip and a photosensor to scan the bar code pattern and having its output connected to the evaluation and display means (FIG. 1).