Radio frequency identification reader with illuminated field of view

• US 9,135,477 B2
• Filed: 07/23/2008
• Issued: 09/15/2015
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Inventors: Stern, Miklos, Nair, Chandra, Johnson, Eric M.
• Primary Examiner(s): SMALL, NAOMI J
• Application Number:
  US12/220,335
• Publication Number:
  US 20100019882A1
• Time in Patent Office: 2,610 Days
• Field of Search: 340/572.1, 340/10.3, 235/439, 235/435, 235/472.01, 235/454
• US Class Current: 1/1
• CPC Class Codes: G06K 2207/1011 Aiming
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10386 the interrogation device being of the portable or hand-handheld type, e.g. incorporated in ubiquitous hand-held devices such as PDA or mobile phone, or in the form of a portable dedicated RFID reader
• CPC Class Codes: G06K 7/10544 by scanning of the records by radiation in the optical part of the electromagnetic spectrum
• CPC Class Codes: G06K 7/10732 Light sources

Abstract

A radio frequency identification (RFID) reader for, and method of, reading an RFID tag to obtain data, includes an RFID module supported by a housing and including an antenna for propagating an electromagnetic field over a field of view, as well as an illuminator supported by the housing for visibly illuminating the field of view to enable an operator to see the illuminated field of view and whether the RFID tag is within the illuminated field of view.

Claims

1. A radio frequency identification (RFID) reader for reading an RFID tag to obtain data, comprising:

a housing;

an RFID module supported by the housing and including an antenna for propagating an electromagnetic field over a field of view; and

an illuminator supported by the housing for visibly illuminating substantially all of the field of view over which the electromagnetic field propagates to enable an operator to see the illuminated field of view and whether the RFID tag is within the illuminated field of view, wherein the illuminator is configured to provide visible light over a solid, conical angle substantially matching a solid, conical angle of the field of view of the RFID module.

2. The reader of claim 1, wherein the illuminator includes a laser for generating a visible laser beam, and a scanner for scanning the visible laser beam in a scan pattern over the illuminated field of view;

and wherein the laser and the scanner are components of a laser scanning module supported by the housing and operative for electro-optically reading indicia.

3. The reader of claim 1, wherein the illuminator includes one of an aiming light source for generating a visible aiming light beam, and an illumination light source for generating visible illumination light;

and wherein the one of the aiming light source and the illumination light source is a component of an imaging module supported by the housing and operative for electro-optically reading indicia.

4. The reader of claim 1, wherein the illuminator includes an illumination light source for generating visible illumination light, and an optical element for optically modifying the visible illumination light to entirely cover the illuminated field of view.

5. The reader of claim 1, and a trigger mechanism supported by the housing and manually actuatable by the operator to initiate actuation of the illuminator and the RFID module.

6. The reader of claim 5, and a controller operatively connected to the trigger mechanism, the illuminator and the RFID module, for controlling the illuminator and the RFID module for simultaneous operation in response to actuation of the trigger mechanism.

7. The reader of claim 1, and a switch supported by the housing, for manually switching the illuminator between on and off states.

8. The reader of claim 1, wherein the housing has a handle to be held by the operator in a handheld mode of operation, and a base for supporting the housing on a support surface during a hands-free mode of operation.

18. The reader of claim 1, wherein the illuminator comprises a plurality of optical and electrical components collectively configured to provide visible light to substantially all of the field of view over which the electromagnetic field propagates, and wherein the plurality of optical and electrical components are configured based upon a type of the antenna.

19. The reader of claim 18, wherein the illuminator is disposed within an imaging module, and the reader further comprising a laser scanning module comprising a laser for scanning a laser beam for electro-optically reading indicia.

9. A radio frequency identification (RFID) reader for reading an RFID tag to obtain data, comprising:

RFID means for propagating an electromagnetic field over a field of view; and

means for visibly illuminating substantially all of the field of view over which the electromagnetic field propagates to enable an operator to see the illuminated field of view and whether the RFID tag is within the illuminated field of view, wherein the means for visibly illuminating is configured to provide visible light over a solid, conical angle substantially matching a solid, conical angle of the field of view of the RFID means.

10. A radio frequency identification (RFID) method of reading an RFID tag to obtain data, comprising the steps of:

propagating an electromagnetic field over a field of view of an antenna of an RFID module; and

visibly illuminating substantially all of the field of view over which the electromagnetic field propagates with an illuminator to enable an operator to see the illuminated field of view and whether the RFID tag is within the illuminated field of view, wherein the field of view is visibly illuminated with visible light over a solid, conical angle substantially matching a solid, conical angle of the field of view of the RFID module.

11. The method of claim 10, wherein the illuminating step is performed by generating a visible laser beam with a laser, and scanning the visible laser beam with a scanner in a scan pattern over the illuminated field of view;

and providing the laser and the scanner as components of a laser scanning module operative for electro-optically reading indicia.

12. The method of claim 10, wherein the illuminating step is performed by generating one of a visible aiming light beam with an aiming light source, and visible illumination light with an illumination light source;

and providing the one of the aiming light source and the illumination light source as a component of an imaging module operative for electro-optically reading indicia.

13. The method of claim 10, wherein the illuminating step is performed by generating visible illumination light with an illumination light source, and optically modifying the visible illumination light with an optical element to entirely cover the illuminated field of view.

14. The method of claim 10, and manually actuating a trigger mechanism by the operator to initiate actuation of the illuminator and the RFID module.

15. The method of claim 14, and controlling the illuminator and the RFID module for simultaneous operation in response to actuation of the trigger mechanism.

16. The method of claim 10, and manually switching the illuminator between on and off states.

17. The method of claim 10, and supporting the illuminator and the RFID module with a housing, and configuring the housing with a handle to be held by the operator in a handheld mode of operation, and configuring the housing with a base for supporting the housing on a support surface during a hands-free mode of operation.