System for reading optical indicia

• US 7,322,526 B1
• Filed: 12/13/2005
• Issued: 01/29/2008
• Est. Priority Date: 08/31/1988
• Status: Expired due to Fees

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Koenck, Steven E.
• Primary Examiner(s): Frech; Karl D.
• Application Number:
  US11/302,454
• Time in Patent Office: 777 Days
• Field of Search: 235/462.45, 235/462.46, 235/462.47, 235/462.1, 235/462.11, 235/462.08, 235/462.09, 235/462.2, 235/462.21, 23547201- 3
• US Class Current: 235/462.45
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence

Abstract

A portable hand-held reader unit includes a photosensor array interiorly of the unit and optics for focusing an image of indicia of information contained on and occupying a predetermined area on a label exteriorly of the reader unit. The reader unit further includes a flashable light source such as a xenon flash tube which is disposed in a ring-like manner about the optical field of view of the reader unit. A marker source which in a preferred embodiment comprise four light sources such as photo diodes or laser diodes, for example, are peripherally disposed interiorly of the reader unit laterally adjacent the photosensor array or in another embodiment at the four corners of the photosensor array. Light emitted from the light sources is projected through the optics of the reader unit peripherally of the field of view of the reader unit as marker beams which impinge a surface toward which the reader unit may be pointed in marker spots peripherally of the predetermined area. When the impinging marker spots of light bracket the information indicia on the label and the xenon tube is flashed, the instantaneous illumination of the label transfers an image of the information indicia onto the photosensor array within the reader unit from where the information may be stored within memory or transferred by communication links to a central processor.

Claims

1. In a portable optical reader system,

(a) a hand-held optical reader unit having an optical system for focusing at an interior region of the unit an optical image of information comprising discernible indicia disposed within a predetermined area of information external of the reader unit wherein said hand-held optical reader unit having a longitudinal optical axis;

(b) an area array of photosensor elements disposed at said interior region of said unit where the optical image of information is to be focused for receiving the optical image of information from the predetermined area;

(c) a decoder remote from said hand-held optical reader unit for decoding discernible indicia disposed within optical image of information from said predetermined area;

(d) a communication link between said hand-held optical reader and said decoder for communicating optical image information received by said area array of photosensor elements; and

(e) a light source for illuminating the exterior region exterior of the hand-held optical reader unit and including the predetermined area of information, such that a complete image of the information within the predetermined area is focused onto said area array of photosensor elements wherein said light source is a flashable light source said flashable light source means including an illuminator disposed in a ring configuration about said longitudinal optical axis.

2. In a portable optical reader system,

(a) a hand-held optical reader unit having an optical system for focusing at an interior region of the unit an optical image of information comprising discernible indicia disposed within a predetermined area of information external of the reader unit wherein said hand-held optical reader unit having a longitudinal optical axis;

(b) an area array of photosensor elements disposed at said interior region of said unit where the optical image of information is to be focused for receiving the optical image of information from the predetermined area;

(c) a decoder remote from said hand-held optical reader unit for decoding discernible indicia disposed within optical image of information from said predetermined area;

(d) a communication link between said hand-held optical reader and said decoder for communicating optical image information received by said area array of photosensor elements; and

(e) a light source for illuminating the exterior region exterior of the hand-held optical reader unit and including the predetermined area of information, such that a complete image of the information within the predetermined area is focused onto said area array of photosensor elements wherein said light source is a flashable light source said flashable light source means including an illuminator disposed in a ring configuration about said longitudinal optical axis said flashable illuminator being in the form of a ring-type xenon flash tube.