Antenna for combined RFID optical imager

• US 7,631,809 B2
• Filed: 01/25/2007
• Issued: 12/15/2009
• Est. Priority Date: 01/25/2007
• Status: Active Grant

• Current Assignee: Novanta Corporation (Novanta Inc.)
• Original Assignee: Jadak, LLC (Novanta Inc.)
• Inventors: Mott, Peter Earl
• Primary Examiner(s): Lee; Michael G
• Assistant Examiner(s): GUDORF, LAURA A
• Application Number:
  US11/627,047
• Publication Number:
  US 20080180215A1
• Time in Patent Office: 1,055 Days
• Field of Search: 235/440
• US Class Current: 235/440
• CPC Class Codes: G06K 7/0004 Hybrid readers
• CPC Class Codes: G06K 7/10009 sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

An antenna for use in connection with a combined RFID reader and optical imager. A printer circuit board having a wire loop positioned thereon and a hole formed therethrough is positioned in combination with an optical imager so that the imaging element of the optical imager may capture images through the hole. In addition, illuminating elements, such as LEDs may be provided on the printed circuit board to provide external or additional illumination of target objects. By positioning the antenna and optical imager in such a manner, the space required to implement optical imaging and RFID capabilities is improved and optical imaging and RFID interrogation may be more easily directed at a single object. In addition, extra illumination may be easily provided for improved imaging.

Claims

1. A combined RFID reading and optical imaging system, comprising:

a microcontroller positioned on a first substrate;

an optical imager positioned on said first substrate and interconnected to said microcontroller;

an RFID unit positioned on said first substrate and interconnected to said microcontroller;

a second substrate having an antenna positioned thereon, wherein said second substrate includes a hole formed through an intermediate portion thereof and said antenna is interconnected to said RFID unit, and

wherein said optical imager is positioned to capture images through said hole.

2. The system of claim 1, further comprising an illumination source positioned on said antenna.

3. The system of claim 2, wherein said illumination source is interconnected to said optical imager.

4. The system of claim 3, wherein said illumination source comprises at least one light emitting diode.

5. The system of claim 3, wherein said illumination source comprises at least one bank of light emitting diodes.

6. The system of claim 4, wherein said imager includes a second, on-board illumination source.

7. The system of claim 1, wherein said antenna comprises at least one wire loop.

8. A method of providing RFID reading and optical imaging from a single module comprising an antenna positioned on a substrate having a hole formed there through, an optical imager, and an RFID unit, said method comprising the steps of:

positioning an object in proximity to said module;

capturing an image of said object through said hole in said substrate using said optical imager; and

interrogating said object using said RFID unit.

9. The method of claim 8, wherein said module further comprises an illumination source positioned on said antenna.

10. The method of claim 9, further comprising the step of illuminating said object prior to the step of capturing an image of said object.