Long range optical reader

• US 20040035933A1
• Filed: 05/19/2003
• Published: 02/26/2004
• Est. Priority Date: 06/11/2002
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Izzo, John, Havens, William H., Hennick, Robert J., Robinson, Michael
• Granted Patent: US 7,090,132 B2
• Time in Patent Office: Days
• US Class Current: 235/454
• CPC Class Codes: G06K 7/10584 Source control
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10801 Multidistance reading
• CPC Class Codes: G06K 7/10861 sensing of data fields affixed to objects or articles, e.g. coded labels postal sorting B07C3/14, conveying articles B65G47/48
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: H05K 1/116 Lands, clearance holes or other lay-out details concerning the surrounding of a via
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence
• CPC Class Codes: H05K 2201/09072 Hole or recess under component or special relationship between hole and component
• CPC Class Codes: H05K 2201/09463 Partial lands, i.e. lands or conductive rings not completely surrounding the hole landless plated-through hole or via H05K2201/09545
• CPC Class Codes: H05K 2201/0949 Pad close to a hole, not surrounding the hole if used for surface mounting H05K1/114
• CPC Class Codes: H05K 2201/09645 Patterning on via walls; Plural lands around one hole
• CPC Class Codes: H05K 2201/09809 Coaxial layout reduction of cross-talk, noise or interference by printed shielding conductors for shielding around a single via or around a group of vias H05K1/0222
• CPC Class Codes: H05K 2201/10121 Optical component, e.g. opto-electronic component
• CPC Class Codes: H05K 3/244 Finish plating of conductors, especially of copper conductors, e.g. for pads or lands selective plating methods H05K3/243; finish plating of conductors made by printing techniques H05K3/246; solder as finish H05K3/3457, e.g. by plating H05K3/3473

Abstract

An optical reader including an image sensor, imaging optics, a short range aiming assembly, and a long range aiming assembly. The short range aiming assembly may comprise a plurality of LEDs. The long range aiming assembly may comprise a laser diode assembly which projects an aiming pattern that is readily visible at reading distances of several feet. The optical reader can be configured so that long range aiming assembly is enabled or disabled depending upon a present operating condition.

Claims

1. An optical reader comprising:

a substrate, the substrate defining an opening;

electrical circuitry disposed on the substrate, the electrical circuitry including;

a first annular solder pad disposed about the opening;

a second annular solder pad disposed about the opening, the second annular solder pad disposed concentrically with respect to the first annular solder pad;

a third annular solder pad disposed about the opening, the third annular solder pad disposed concentrically with respect to the first annular solder pad and the second annular solder pad; and

a laser diode coupled to the substrate, the laser diode including;

a first electrical lead coupled to the first annular solder pad;

a second electrical lead coupled to the second annular solder pad; and

a third electrical lead coupled to the third annular solder pad.

2. The optical reader of claim 1 wherein the substrate includes a first surface;

wherein the first annular solder pad is disposed on said first surface;

wherein the second annular solder pad is disposed on said first surface; and

wherein the third annular solder pad is disposed on said first surface.

3. The optical reader of claim 2 wherein the substrate is a printed circuit board.

4. An optical reader comprising:

a substrate, the substrate defining an opening;

a first arcuate solder pad coupled to the substrate, the first arcuate solder pad disposed proximate to the opening;

a second arcuate solder pad coupled to the substrate, the second arcuate solder pad disposed proximate to the opening;

a third arcuate solder pad coupled to the substrate, the third arcuate solder pad disposed proximate to the opening;

wherein the first arcuate solder pad is electrically insulated from the second arcuate solder pad;

wherein the first arcuate solder pad is electrically insulated from the third arcuate solder pad; and

wherein the second arcuate solder pad is electrically insulated from the third arcuate solder pad.

5. An optical reader comprising:

a substrate, the substrate defining an opening;

electrical circuitry disposed on the substrate, the electrical circuitry including;

a first solder pad disposed proximate to the opening;

a second solder pad disposed proximate to the opening; and

a third solder pad disposed proximate to the opening;

a laser diode coupled to the electrical circuitry, the laser diode including;

a first electrical lead coupled to the first solder pad;

a second electrical lead coupled to the second solder pad; and

a third electrical lead coupled to the third solder pad;

6. The optical reader of claim 5 wherein the opening is a circular opening.

7. The optical reader of claim 6 wherein the first solder pad is a first annular solder pad disposed concentrically with respect to the opening;

wherein the second solder pad is a second annular solder pad disposed concentrically with respect to the first annular solder pad; and

wherein the third solder pad is a third annular solder pad disposed concentrically with respect to the first annular solder pad and the second annular solder pad.

8. An optical reader comprising:

a first substrate, said first substrate having a first surface and a second surface (204);

an illumination assembly coupled to said second surface, said illumination assembly including at least two light emitting diodes;

an illuminating lens assembly coupled to said illumination assembly, said illuminating lens assembly including two lenses, said illuminating lens assembly defining an aperture;

an imaging assembly coupled to said illumination assembly, said imaging assembly having an imaging axis, said imaging axis laying on a first plane, said imaging assembly including a plurality of photodetectors;

a targeting lens (224) coupled to said first surface (202); and

a laser diode assembly (226) coupled to said first surface (202), said laser diode assembly (226) configured to emit a laser beam (228), said laser beam propagating along an axis (230), sad laser diode assembly (226) disposed such that said laser beam (228) is directed through said targeting lens (224).

9. The optical reader of claim 8 wherein said second surface includes a mounting surface.

10. The optical reader of claim 9 wherein said laser diode assembly is coupled to said mounting surface

11. The optical reader of claim 8 wherein said targeting lens is a negative lens.

12. The optical reader of claim 11 wherein said negative lens is a planoconcave lens.

13. The optical reader of claim 11 wherein said negative lens is a biconcave lens.

14. The optical reader of claim 11 wherein said negative lens is a diverging concavoconvex lens.

15. The optical reader of claim 8 wherein said targeting lens is a positive lens.

16. The optical reader of claim 15 wherein said positive lens is a biconvex lens.

17. The optical reader of claim 15 wherein said positive lens is a planoconvex lens.

18. The optical reader of claim 15 wherein said positive lens is a converging concavoconvex lens.

19. The optical reader of claim 8 wherein said targeting lens is a diffractive lens.

20. The optical reader of claim 8 wherein said targeting lens is an anamorphic lens.

21. The optical reader of claim 8 wherein said plurality of photodetectors are disposed to form a linear array.

22. The optical reader of claim 8 wherein said plurality of photodetectors are disposed to form a two-dimensional array.

23. The optical reader of claim 8 wherein second surface defines a laser diode assembly mounting surface, wherein said laser diode assembly includes a first mounting surface slideably engageable with said laser diode assembly mounting surface.

24. The optical reader of claim 23 wherein said laser diode assembly is selectively rotatable about a predetermined axis.

25. The optical reader of claim 23 wherein said laser diode assembly mounting surface includes a concave surface and said mounting surface includes a convex surface engageable with said concave surface.

26. The optical reader of claim 15 wherein said convex surface has a first radius of curvature;

and wherein said concave surface has said first radius of curvature.

27. The optical reader of claim 25 further including a clamping pad engageable with said laser diode assembly.

28. The optical reader of claim 27 wherein said laser diode assembly further includes a concave surface

29. An optical reader comprising:

a first substrate, said first substrate having a first surface and a second surface;

a light source configured to emit a beam of light propagating along an axis, said light source coupled to said first surface;

an illumination assembly coupled to said second surface, said illumination assembly including at least two light emitting diodes;

an imaging assembly coupled to said illumination assembly, said imaging assembly having an imaging axis, said imaging axis laying on a first plane, said imaging assembly including a plurality of photodetectors; and

an illuminating lens assembly coupled to said illumination assembly, said illuminating lens assembly, said illuminating lens assembly defining an aperture, said illuminating lens assembly including;

an illumination diffuser;

a first reflective surface disposed in the path of the beam of light thereby directing the beam of light along a first predetermined path;

a second reflective surface disposed in said first predetermined path thereby directing the laser beam along a second predetermined path; and

a diffractive element disposed is said second predetermined path, said diffractive element disposed to receive the beam of light whereby said diffractive element modifies the direction of propagation of the beam of light.

30. The optical reader of claim 29 wherein said light source is a laser.

31. The optical reader of claim 29 wherein said light source is a laser diode.

32. The optical reader of claim 29 wherein said second reflective surface is disposed parallel to said first reflective surface.

33. The optical reader of claim 29 wherein said diffractive element includes a beam splitter.

34. The optical reader of claim 29 wherein said diffractive element includes a prism.

35. An optical reader comprising:

a first substrate, said first substrate having a first surface and a second surface;

an illumination assembly coupled to said second surface, said illumination assembly including a first light source and a second light source;

an illuminating lens assembly defining an aperture and including two lenses, said illuminating lens assembly coupled to said illumination assembly;

an imaging assembly coupled to said illumination assembly, said imaging assembly having an imaging axis, said imaging axis laying on a first plane, said imaging assembly including a plurality of photodetectors;

a targeting lens coupled to said first surface; and

a third light source configured to supply a beam of light propagating along an axis, said light source coupled to said first surface and disposed such that the beam of light is directed through said targeting lens.

36. The optical reader of claim 35 wherein said third light source includes a laser.

37. The optical reader of claim 35 wherein said third light source includes a laser diode.

38. An optical reader comprising:

a first substrate, said first substrate having a first surface and a second surface;

a first light source configured to emit a beam of light propagating along an axis, said light source coupled to said first surface;

an illumination assembly coupled to said second surface, said illumination assembly including a second light source and a third light source;

an imaging assembly coupled to said illumination assembly, said imaging assembly having an imaging axis, said imaging axis laying on a first plane, said imaging assembly including a plurality of photodetectors; and

an illuminating lens assembly coupled to said illumination assembly, said illuminating lens assembly, said illuminating lens assembly defining an aperture, said illuminating lens assembly including;

an illumination diffuser disposed to diffuse light from said second light source and said third light source in a predetermined manner.

a first reflective surface disposed in the path of the beam of light thereby directing the beam of light along a first predetermined path;

a second reflective surface disposed in said first predetermined path thereby directing the beam of light along a second predetermined path; and

a targeting lens disposed to receive the beam of light, whereby said targeting lens modifies the cross sectional shape of the beam of light.

39. The optical reader of claim 38 wherein said plurality of photodetectors are disposed about an axis parallel to the photosensitive elements of each of said plurality of photodetectors.

40. The optical reader of claim 39 wherein said plurality of photodetectors are disposed so as to form a one-dimensional array.

41. An optical reader for reading an encoded image, the optical reader comprising:

a long range target illumination assembly, said long range target illumination assembly including a first optical path;

a short range target illumination assembly, said short range target illumination assembly including a second optical path;

an image acquisition assembly, said image acquisition assembly including;

a third optical path; and

a horizontal axis;

wherein the optical reader is configured to capture an image of a optical target; and

wherein the encoded image lies in a first plane.

42. The optical reader of claim 41 wherein said long range target illumination assembly is selectively operable to provide a first visible indicia of the orientation of the image acquisition assembly.

43. The optical reader of claim 42 wherein said short range target illumination assembly is selectively operable to provide a second visible indicia of the location of the orientation of the image acquisition assembly.

44. The optical reader of claim 43 wherein said image sensor includes a plurality of photodetectors disposed so as to form a linear array of photodetectors.

45. The optical reader of claim 44 wherein said first visible indicia is a bar of light parallel to said horizontal axis.

46. The optical reader of claim 44 wherein said first visible indicia is a bar of light at an angle to said horizontal axis.

47. The optical reader of claim 46 wherein said first visible indicia is a bar of light perpendicular to said horizontal axis.

48. The optical reader of claim 44 wherein said second visible indicia is a bar of light parallel to said horizontal axis.

49. The optical reader of claim 48 wherein said second visible indicia is a bar of light at an angle to said horizontal axis.

50. The optical reader of claim 49 wherein said second visible indicia is a bar of light perpendicular to said horizontal axis.

51. The optical reader of claim 44 wherein said first visible indicia is a plurality of dots.

52. The optical reader of claim 51 wherein said plurality of dots are disposed proximate to a display axis.

53. The optical reader of claim 52 wherein said display axis is parallel to said horizontal axis.

54. The optical reader of claim 53 wherein said display axis is perpendicular to said horizontal axis.