System for analyzing sample liquids containing a position control unit
First Claim
1. A system for analyzing sample liquids by evaluating test elements with an analytical unit in which a test element to be analyzed is positioned by a holder in an analytical position relative to the analytical unit, the system comprising, a position control unit to check whether an analytical area of the test element is correctly positioned relative to the analytical unit wherein the position control unit comprises:
- (a) a light source to irradiate an area of the test element, (b) a detector to detect light reflected from the area, and (c) an evaluation unit, wherein the light source and detector are positioned relative to one another in such a manner that the light intensity of specularly reflected radiation from the test strip at the detector when the test element is correctly positioned is different from the light intensity of reflected radiation from the test element at the detector when it is incorrectly positioned, and the evaluation unit is adapted to recognize any faulty positioning on the basis of the light intensity at the detector.
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Accused Products
Abstract
System for analyzing sample liquids by evaluating test elements with an analytical unit (20) in which a test element (10) to be analyzed is positioned by a holder (21, 22, 120, 140) in an analytical position relative to the analytical unit and the system additionally comprises a position control unit to check whether an analytical area of the test element is correctly positioned relative to the analytical unit wherein the position control unit comprises a light source (30, 2) to irradiate an area of the test element and preferably the analytical area (11), a detector (31, 131) to detect light reflected from the area and an evaluation unit, and the light source and detector are positioned relative to one another in such a manner that the light intensity of specularly reflected radiation at the detector when the test element is correctly positioned is different from a light intensity when it is incorrectly positioned and the evaluation unit recognizes any faulty positioning on the basis of the light intensity at the detector.
In addition the invention concerns a method for sample analysis using a position control unit to check whether a test element is correctly positioned relative to an evaluation optics.
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Citations
14 Claims
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1. A system for analyzing sample liquids by evaluating test elements with an analytical unit in which a test element to be analyzed is positioned by a holder in an analytical position relative to the analytical unit, the system comprising, a position control unit to check whether an analytical area of the test element is correctly positioned relative to the analytical unit wherein the position control unit comprises:
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(a) a light source to irradiate an area of the test element, (b) a detector to detect light reflected from the area, and (c) an evaluation unit, wherein the light source and detector are positioned relative to one another in such a manner that the light intensity of specularly reflected radiation from the test strip at the detector when the test element is correctly positioned is different from the light intensity of reflected radiation from the test element at the detector when it is incorrectly positioned, and the evaluation unit is adapted to recognize any faulty positioning on the basis of the light intensity at the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A method for analyzing sample liquids comprising evaluating test elements using an analytical unit in which a position control unit is used to check whether an analytical area of the test element is positioned correctly relative to the analytical unit, irradiating an area of the test element by a light source, detecting radiation reflected from the area, recording a signal generated by the detecting step to check the position of the analytical area wherein the light source and detector are positioned relative to one another in such a manner that the intensity of radiation reflected from the test element and detected is different when the analytical area is correctly positioned than the intensity when it is incorrectly positioned, and indicating to a user whether the analytical area is positioned correctly relative to the analytical unit.
Specification