METHODS FOR ILLUMINATING BARCODES

• US 20080105748A1
• Filed: 09/18/2007
• Published: 05/08/2008
• Est. Priority Date: 09/19/2006
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Microscan Systems Inc (Omron Corporation)
• Inventors: Lei, Ming
• Granted Patent: US 7,886,979 B2
• Time in Patent Office: Days
• US Class Current: 235/462.42
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning

Abstract

Certain exemplary embodiments can comprise a method, which can comprise obtaining an image of a barcode. The image can be obtained via a barcode reader. The barcode reader can comprise a camera. The camera can define a camera axis. The barcode reader can comprise a lighting module that comprises set of lighting elements that emit light.

Claims

1. A method comprising:

obtaining an image of a two dimensional direct part marking barcode, said image obtained via a barcode pistol grip barcode reader that comprises a camera, said camera defining a camera axis, said barcode reader comprising an on-axis lighting module that comprises first set of light emitting diodes (LEDs) having a first emitted color, said on-axis lighting module adapted to direct light on an on-axis lighting direction that is approximately collinear with said camera axis, said barcode reader comprising an off-axis lighting module that is substantially mirror-less, filter-less, and lens-less, a distance between said off-axis lighting module and said camera adjustable, said off-axis lighting module comprising a second set of LEDs having a second emitted color, said off-axis lighting module adapted to direct light in an off-axis lighting direction that intersects said camera axis at an adjustable angle, said adjustable angle less than approximately fifty five degrees, said barcode reader adapted to obtain a decodable image at a distance between approximately one inch and approximately four inches from said two dimensional direct part marking barcode.

2. The method of claim 1, further comprising:

obtaining an object comprising said two dimensional direct part marking barcode.

3. The method of claim 1, further comprising:

transmitting said image to a processor adapted to decode said image.

4. The method of claim 1, further comprising:

via a wireless transceiver, transmitting information regarding said image to an information device.

5. The method of claim 1, further comprising:

via a network, transmitting said image to an information device from said barcode reader.

6. The method of claim 1, wherein said first emitted color is substantially red.

7. The method of claim 1, wherein said off-axis lighting module comprises a first subset of LEDs and a second subset of LEDs, said first subset of LEDs directed at a different angle relative to said camera axis from said second subset of LEDs, a light controller comprised by said barcode reader adapted to obtain a first sequential image of said direct part marking barcode with said direct part marking barcode illuminated by only said first subset of LEDs, said light controller adapted to obtain a second sequential image of said direct part marking barcode with said direct part marking barcode illuminated by only said second subset of LEDs.

8. The method of claim 1, wherein said off-axis lighting module comprises a plurality of subsets of LEDs, each subset of said plurality of subsets of LEDs adapted to direct light energy that intersects said camera axis at a distinct angle relative to said camera axis, each said distinct angle less than approximately fifty five degrees, a light controller comprised by said barcode reader adapted to obtain a set of sequential images of said direct part marking barcode, each image of said set of sequential images obtained with said direct part marking barcode illuminated by only one subset of LEDs of said plurality of subsets of LEDs.

9. The method of claim 1, wherein said second emitted color is substantially white.

10. The method of claim 1, wherein said second emitted color is substantially green.

11. The method of claim 1, wherein said barcode reader comprises a trigger on said pistol grip, said trigger adapted to cause at least said first set of LEDs to illuminate.

12. The method of claim 1, wherein said barcode reader is adapted to receive said off-axis lighting module at any of a plurality of locations.

13. The method of claim 1, wherein said barcode reader is adapted to obtain a decodable image at a distance approximately two inches from said two dimensional direct part marking barcode.

14. The method of claim 1, wherein said off-axis lighting module is attached as a part of a body of said camera.

15. The method of claim 1, wherein a distance between said off-axis lighting module and said camera is adjustable.

16. A method comprising:

obtaining an image of a two dimensional direct part marking barcode, said image obtained via a barcode pistol grip barcode reader that comprises a camera, said camera defining a camera axis, said barcode reader comprising an on-axis lighting module that comprises first set of light emitting diodes (LEDs) having a first emitted color, said on-axis lighting module adapted to direct light on an on-axis lighting direction that is approximately collinear with said camera axis, said barcode reader comprising an off-axis lighting module that is substantially mirror-less, filter-less, and lens-less, a distance between said off-axis lighting module and said camera adjustable, said off-axis lighting module comprising a second set of LEDs having a second emitted color, said off-axis lighting module adapted to direct light in an off-axis lighting direction that intersects said camera axis at an adjustable angle, said adjustable angle less than approximately fifty five degrees, said off-axis lighting module comprising a plurality of subsets of LEDs, each subset of said plurality of subsets of LEDs adapted to direct light energy that intersects said camera axis at a distinct angle relative to said camera axis, each said distinct angle less than approximately fifty five degrees, a light controller comprised by said barcode reader adapted to obtain a set of sequential images of said direct part marking barcode, each image of said set of sequential images obtained with said direct part marking barcode illuminated by only one subset of LEDs of said plurality of subsets of LEDs.

17. The method of claim 16, further comprising:

directing said on-axis lighting module in a direction approximately perpendicular to a surface comprising said two dimensional direct part marking barcode.

18. The method of claim 16, further comprising:

decoding said image based upon a camera image.

19. The method of claim 16, further comprising:

decoding said image, said image based upon a camera image obtained from an illumination of said two dimensional direct part marking barcode by said off-axis lighting module.

20. The method of claim 16, further comprising:

decoding said image, said image based upon a camera image obtained from an illumination of said two dimensional direct part marking barcode by both said on-axis lighting module and said off-axis lighting module.

21. The method of claim 16, further comprising:

directing said on-axis lighting module in a direction that is substantially non-perpendicular to a surface comprising said two dimensional direct part marking barcode.

22. A machine-readable medium comprising machine instructions for activities comprising:

obtaining an image of a two dimensional direct part marking, said image obtained via a barcode pistol grip barcode reader that comprises a camera, said camera defining a camera axis, said barcode reader comprising an on-axis lighting module that comprises first set of light emitting diodes (LEDs) having a first emitted color, said on-axis lighting module adapted to direct light on an on-axis lighting direction that is approximately collinear with said camera axis, said barcode reader comprising an off-axis lighting module that is substantially mirror-less, filter-less, and lens-less, said off-axis lighting module comprising a second set of LEDs having a second emitted color, said off-axis lighting module adapted to direct light in an off-axis lighting direction that intersects said camera axis at an adjustable angle, said adjustable angle less than approximately fifty five degrees, said barcode reader adapted to obtain a decodable image at a distance between approximately one inch and approximately four inches from said two dimensional direct part marking barcode.