Optical readhead and method of using the same

• US 8,586,911 B2
• Filed: 10/21/2009
• Issued: 11/19/2013
• Est. Priority Date: 10/21/2008
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Micinski, Russell J, Dosmann, Andrew J., Charlton, Steven C
• Primary Examiner(s): Gaworecki, Mark R
• Application Number:
  US13/125,126
• Publication Number:
  US 20110198487A1
• Time in Patent Office: 1,490 Days
• Field of Search: 250/252.1, 356/51, 356/432, 702/40, 702/85
• US Class Current: 250/252.1
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: G01N 2021/8494 Measuring or storing parameters of the band
• CPC Class Codes: G01N 2021/8645 using multidetectors, detector array
• CPC Class Codes: G01N 21/274 Calibration, base line adjustment, drift correction
• CPC Class Codes: G01N 21/8483 Investigating reagent band test-element handling not specific to a test method G01N33/4875; analytical elements specific to chemical analysis of biological material G01N33/52; autometer with reagent band G01N35/04
• CPC Class Codes: G01N 2201/12746 Calibration values determination
• CPC Class Codes: G01N 27/4163 checking the operation of, or calibrating, the measuring apparatus G01N27/3274, G01N27/4175 and G01N33/0006 take precedence
• CPC Class Codes: G01N 33/48771 Coding of information, e.g. calibration data, lot number

Abstract

A method of determining auto-calibrating information of a test sensor includes providing an optical read head that includes a light source, a light guide and a detector. The read head forms an opening that is sized to receive a test sensor. The detector includes a linear-detector array or single detector. A test sensor is provided having apertures formed therein. The test sensor is placed in the opening of the optical read head. Light is transmitted from the light source through the apertures. The light transmitted through the apertures using the detector or detecting the absence of light being transmitted through the test sensor using the detector is detected. The detected light or the absence of detected light information from the detector is used to determine the auto-calibration information of the test sensor.

Claims

1. A method of determining auto-calibrating information of a test sensor, the method comprising the acts of:

providing an optical read head, the optical read head including a light source, a light guide and a detector, the optical read head forming an opening that is sized to receive a test sensor, the optical read head having a thickness of from about 0.1 inch to about 0.2 inch;

placing the test sensor in the opening of the optical read head;

transmitting light from the light source to the test sensor;

detecting the light transmitted through the test sensor or detecting the absence of light being transmitted through the test sensor using the detector; and

using the detected light or the absence of detected light information from the detector to determine the auto-calibration information of the test sensor.

2. The method of claim 1 wherein the detector is a linear-detector array.

3. The method of claim 1 wherein the detector is a single detector.

4. The method of claim 1 wherein the optical read head has a thickness of from 0.125 to 0.175 inch.

5. The method of claim 1 wherein the path of light from the light source to the test sensor is a three-dimensional path.

6. The method of claim 5 wherein the light guide has first surface and a second surface to assist in directing the light from the light source.

7. The method of claim 6 wherein the first surface of the light guide is at approximately a 45 degree angle relative to the incoming light from the light source and the second surface assists in redirecting the light in a generally vertical direction.

8. The method of claim 1 wherein the path of light from the light source to the test sensor is a two-dimensional path.

9. The method of claim 1 wherein the light guide includes a plurality of light guides.

10. The method of claim 9 wherein the light guides are placed adjacent to each other and angled with respect to the incoming light.

11. The method of claim 1 wherein the light guide transmits the light from an initially generally horizontal direction and redirects the light in a generally vertical direction onto the test sensor.

12. The method of claim 1 wherein the light guide transmits the light from an initially generally horizontal direction and redirects the light in a generally perpendicular direction in the same plane and then redirects the light in a generally vertical direction.

13. The method of claim 1 wherein the test sensor is an optical test sensor.

14. A method of determining auto-calibrating information of a test sensor, the method comprising the acts of:

providing an optical read head, the optical read head including a light source, a light guide and a detector, the optical read head forming an opening that is sized to receive a test sensor, the optical read head having a thickness of from about 0.1 inch to about 0.2 inch;

placing the test sensor in the opening of the optical read head;

transmitting light from the light source to the test sensor;

detecting the light transmitted through the test sensor or detecting the absence of light being transmitted through the test sensor using the detector; and

using the detected light or the absence of detected light information from the detector to determine the auto-calibration information of the test sensor,

wherein the test sensor has a plurality of apertures formed therein, wherein the light is transmitted from the light source through the plurality of apertures and wherein the light transmitted through the plurality of apertures or the absence of light being transmitted through the test sensor is detected.

15. A method of determining auto-calibrating information of a test sensor, the method comprising the acts of:

providing an optical read head, the optical read head including a light source, a light guide and a detector, the optical read head forming an opening that is sized to receive a test sensor, the optical read head having a thickness of from about 0.1 inch to about 0.2 inch;

placing the test sensor in the opening of the optical read head;

transmitting light from the light source to the test sensor;

detecting the light transmitted through the test sensor or detecting the absence of light being transmitted through the test sensor using the detector; and

using the detected light or the absence of detected light information from the detector to determine the auto-calibration information of the test sensor,

wherein the test sensor is an electrochemical test sensor.

16. A method of using an optical read head with a test sensor, the method comprising the acts of:

providing an optical read head, the optical read head including a light source, a light guide and a detector, the optical read head forming an opening that is sized to receive a test sensor, the optical read head having a thickness of less than about 0.2 inch;

placing the test sensor in the opening of the optical read head;

placing a fluid sample on the test sensor;

transmitting light from the light source to the test sensor;

detecting the light transmitted through the test sensor or detecting the absence of light being transmitted through the test sensor using the detector; and

using the detected light or the absence of detected light information to assist in determining information related to the test sensor.

17. The method of claim 16 wherein the optical read has a thickness of from 0.1 to 0.2 inch.

18. The method of claim 17 wherein the optical read has a thickness of from 0.125 to 0.175 inch.

19. The method of claim 16 wherein the path of light from the light source to the test sensor is a three-dimensional path.

20. The method of claim 19 wherein the light guide has first surface and a second surface to assist in directing the light from the light source, the first surface of the light guide is at approximately a 45 degree angle relative to the incoming light from the light source and the second surface assists in redirecting the light in a generally vertical direction.

21. The method of claim 16 wherein the path of light from the light source to the test sensor is a two-dimensional path.

22. The method of claim 16 wherein the light guide transmits the light from an initially generally horizontal direction and redirects the light in a generally vertical direction onto the test sensor.

23. The method of claim 16 wherein the light guide transmits the light from an initially generally horizontal direction and redirects the light in a generally perpendicular direction in the same plane and then redirects the light in a generally vertical direction.

24. A method of using an optical read head with a test sensor, the method comprising the acts of:

providing an optical read head, the optical read head including a light source, a light guide and a detector, the optical read head forming an opening that is sized to receive a test sensor, the optical read head having a thickness of less than about 0.2 inch;

placing the test sensor in the opening of the optical read head;

placing a fluid sample on the test sensor;

transmitting light from the light source to the test sensor;

detecting the light transmitted through the test sensor or detecting the absence of light being transmitted through the test sensor using the detector; and

using the detected light or the absence of detected light information to assist in determining information related to the test sensor,

wherein the test sensor has a plurality of apertures formed therein, wherein the light is transmitted from the light source through the plurality of apertures and wherein the light transmitted through the plurality of apertures or the absence of light being transmitted through the test sensor is detected.