Method and apparatus for detecting and preventing counterfeiting

• US 5,966,205 A
• Filed: 07/01/1997
• Issued: 10/12/1999
• Est. Priority Date: 07/01/1997
• Status: Expired due to Term

• Current Assignee: JJL Technologies, L.L.C., RPX Corporation
• Original Assignee: LJ Laboratories L.L.C.
• Inventors: Jung, Wayne D., Jung, Russell W., Loudermilk, Alan R.
• Primary Examiner(s): Kim, Robert H.
• Assistant Examiner(s): MERLINO, AMANDA H
• Application Number:
  US08/886,566
• Time in Patent Office: 833 Days
• Field of Search: 356/71
• US Class Current: 356/71
• CPC Class Codes: A61B 2560/0233 Optical standards
• CPC Class Codes: A61C 19/10 Supports for artificial teeth for transport or for comparison of the colour
• CPC Class Codes: G01J 3/513 having fixed filter-detector pairs
• CPC Class Codes: G01N 21/474 Details of optical heads therefor, e.g. using optical fibres
• CPC Class Codes: G01N 21/57 Measuring gloss
• CPC Class Codes: G07D 7/1205 Testing spectral properties
• CPC Class Codes: G07D 7/17 Apparatus characterised by positioning means or by means responsive to positioning

Abstract

Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of an object are disclosed. Perimeter receiver fiber optics are spaced apart from a source fiber optic and receive light from the surface of the object being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and/or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing prostheses based on measured data also is disclosed. Measured data also may be stored and/or organized as part of a data base. Such methods and implements are desirably utilized for purposes of detecting and preventing counterfeiting or the like.

Claims

1. A method for determining if an article is genuine, comprising the steps of:

forming on the article a first layer, the first layer having an outer surface and bulk material thereunder;

forming a second layer over the outer surface of the first layer, the second laver having an outer surface and bulk material thereunder, wherein the second layer is substantially semi-translucent;

measuring with a probe optical reflection properties of the outer surface of at least one of the first and second layers;

measuring with the probe optical properties of the bulk material of at least one of the first and second layers;

recording the measured optical properties and the measured optical reflection properties; and

determining if the article is genuine by subsequently measuring optical reflection properties and optical properties of the article and comparing the subsequently measured optical reflection properties and optical properties with the recorded optical reflection properties and optical properties.

2. The method of claim 1, wherein the probe comprises a plurality of source/receiver elements, wherein the source/receiver elements are arranged in one or more rings around a central source/receiver element.

3. The method of claim 2, wherein the source/receiver elements comprise fiber optic source/receiver elements.

4. The method of claim 1, wherein the probe includes at least two receivers, wherein at least one receiver has a first numerical aperture, where at least one receiver has a second numerical aperture, wherein the first numerical aperture is different from the second numerical aperture.

5. The method of claim 1, wherein light received by the probe is coupled to one or more sensing elements comprising light-to-frequency converters.

6. The method of claim 1, wherein optical properties are measured a predetermined distance from a location marker on the article.

7. The method of claim 6, wherein where the one or more locations are located on the article is not identified on the article.

8. The method of claim 1, wherein the determination is made based on one or more acceptance criteria.

9. The method of claim 8, wherein the acceptance criteria comprise a delta E value.

10. The method of claim 8, wherein the acceptance criteria comprise a threshold value.

11. The method of claim 1, wherein the article comprises an art work.

12. The method of claim 1, wherein the article comprises a painting.

13. The method of claim 1, wherein the article comprises a sculpture.

14. The method of claim 1, wherein the article comprises a passport.

15. The method of claim 1, wherein the article comprises a credit card.

16. The method of claim 1, wherein the article comprises a check.

17. The method of claim 1, wherein the article comprises a traveler'"'"'s check.

18. The method of claim 1, wherein the article comprises a security.

19. The method of claim 1, wherein the article comprises a stock certificate.

20. The method of claim 1, wherein the article comprises a bond.

21. The method of claim 1, wherein the article comprises currency.

22. The method of claim 1, wherein the article comprises a negotiable instrument.

23. The method of claim 1, wherein the measured optical properties include translucency, wherein measured spectral properties are adjusted based on the measured translucency.

24. The method of claim 1, wherein the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured gloss.

25. The method of claim 1, wherein the measured optical properties include translucency and the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured translucency and gloss.

26. The method of claim 1, wherein the probe includes at least one source that emits light on a first area of an outer surface of the article, wherein the probe includes at least one receiver that receives light reflected from a second area of the outer surface of the article, wherein the step of measuring optical properties of the bulk material includes at least one measurement taken when the first area does not intersect with the second area.

27. A method for determining if an article is genuine, comprising the steps of:

forming on the article a first layer and a subsurface pattern, the first layer having an outer surface and bulk material thereunder;

forming a second layer over the first layer, wherein the second layer is substantially semi-translucent, the second layer having an outer surface and bulk material thereunder;

measuring with a probe optical reflection properties of the outer surface of at least one of the first and second layers and/or measuring optical properties of the bulk material of at least one of the first and second layers;

measuring with the probe the subsurface pattern;

recording the measured optical properties and subsurface pattern;

determining if the article is genuine by subsequently measuring optical reflection properties and/or optical properties of the article and the subsurface pattern and comparing the measured optical reflection properties and/or optical properties and subsurface pattern with the recorded optical reflection properties and/or optical properties and subsurface pattern.

28. The method of claim 27, wherein the subsurface pattern is visible from the surface of the article.

29. The method of claim 27, wherein the subsurface pattern is substantially invisible from the surface of the article.

30. The method of claim 27, wherein the subsurface pattern comprises a bar code.

31. The method of claim 27, wherein the subsurface pattern is substantially of one color.

32. The method of claim 27, wherein the subsurface pattern is multicolored.

33. The method of claim 32, wherein the subsurface pattern comprises a bar code.

34. The method of claim 33, wherein the multicolored bar code contains multiple data fields.

35. The method of claim 27, wherein the probe comprises a plurality of source/receiver elements, wherein the source/receiver elements are arranged in one or more rings around a central source/receiver element.

36. The method of claim 35, wherein the source/receiver elements comprise fiber optic source/receiver elements.

37. The method of claim 27, wherein the probe includes at least two receivers, wherein at least one receiver has a first numerical aperture, where at least one receiver has a second numerical aperture, wherein the first numerical aperture is different from the second numerical aperture.

38. The method of claim 27, wherein light received by the probe is coupled to one or more sensing elements comprising light-to-frequency converters.

39. The method of claim 27, wherein optical properties are measured a predetermined distance from a location marker on the article.

40. The method of claim 39, wherein where the one or more locations are located on the article is not identified on the article.

41. The method of claim 27, wherein the determination is made based on one or more acceptance criteria.

42. The method of claim 41, wherein the acceptance criteria comprise a delta E value.

43. The method of claim 41, wherein the acceptance criteria comprise a threshold value.

44. The method of claim 27, wherein the article comprises an art work.

45. The method of claim 27, wherein the article comprises a painting.

46. The method of claim 27, wherein the article comprises a sculpture.

47. The method of claim 27, wherein the article comprises a passport.

48. The method of claim 27, wherein the article comprises a credit card.

49. The method of claim 27, wherein the article comprises a check.

50. The method of claim 27, wherein the article comprises a traveler'"'"'s check.

51. The method of claim 27, wherein the article comprises a security.

52. The method of claim 27, wherein the article comprises a stock certificate.

53. The method of claim 27, wherein the article comprises a bond.

54. The method of claim 27, wherein the article comprises currency.

55. The method of claim 27, wherein the article comprises a negotiable instrument.

56. The method of claim 27, wherein the measured optical properties include translucency, wherein measured spectral properties are adjusted based on the measured translucency.

57. The method of claim 27, wherein the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured gloss.

58. The method of claim 27, wherein the measured optical properties include translucency and the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured translucency and gloss.

59. The method of claim 27, wherein the probe includes at least one source that emits light on a first area of an outer surface of the article, wherein the probe includes at least one receiver that receives light reflected from a second area of the outer surface of the article, wherein the step of measuring optical properties of the bulk material includes at least one measurement taken when the first area does not intersect with the second area.

60. A method for determining if an article is genuine, comprising the steps of:

forming on the article a first layer with a geometric pattern, the first layer having an outer surface and bulk material thereunder;

forming a second layer over the first layer, wherein the second layer is substantially semi-translucent, the second layer having an outer surface and bulk material thereunder;

measuring with a probe optical reflection properties of the outer surface of at least one of the first and second layers and/or measuring optical properties of the bulk material of at least one of the first and second layers;

measuring with the probe the geometric pattern;

recording the measured optical reflection properties and/or optical properties and geometric pattern;

determining if the article is genuine by subsequently measuring optical reflection properties and/or optical properties of the article and the geometric pattern and comparing the subsequently measured optical reflection properties and/or optical properties and geometric pattern with the recorded optical reflection properties and/or optical properties and geometric pattern.

61. The method of claim 60, wherein the geometric pattern contains a plurality of codes that are accessed measuring the geometric pattern on a plurality of axes.

62. The method of claim 60, wherein the probe comprises a plurality of source/receiver elements, wherein the source/receiver elements are arranged in one or more rings around a central source/receiver element.

63. The method of claim 62, wherein the source/receiver elements comprise fiber optic source/receiver elements.

64. The method of claim 60, wherein the probe includes at least two receivers, wherein at least one receiver has a first numerical aperture, where at least one receiver has a second numerical aperture, wherein the first numerical aperture is different from the second numerical aperture.

65. The method of claim 60, wherein light received by the probe is coupled to one or more sensing elements comprising light-to-frequency converters.

66. The method of claim 60, wherein optical properties are measured a predetermined distance from a location marker on the article.

67. The method of claim 66, wherein where the one or more locations are located on the article is not identified on the article.

68. The method of claim 60, wherein the determination is made based on one or more acceptance criteria.

69. The method of claim 68, wherein the acceptance criteria comprise a delta E value.

70. The method of claim 68, wherein the acceptance criteria comprise a threshold value.

71. The method of claim 60, wherein the article comprises an art work.

72. The method of claim 60, wherein the article comprises a painting.

73. The method of claim 60, wherein the article comprises a sculpture.

74. The method of claim 60, wherein the article comprises a passport.

75. The method of claim 60, wherein the article comprises a credit card.

76. The method of claim 60, wherein the article comprises a check.

77. The method of claim 60, wherein the article comprises a traveler'"'"'s check.

78. The method of claim 60, wherein the article comprises a security.

79. The method of claim 60, wherein the article comprises a stock certificate.

80. The method of claim 60, wherein the article comprises a bond.

81. The method of claim 60, wherein the article comprises currency.

82. The method of claim 60, wherein the article comprises a negotiable instrument.

83. The method of claim 60, wherein the measured optical properties include translucency, wherein measured spectral properties are adjusted based on the measured translucency.

84. The method of claim 60, wherein the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured gloss.

85. The method of claim 60, wherein the measured optical properties include translucency and the measured optical reflection properties include gloss, wherein measured spectral properties are adjusted based on the measured translucency and gloss.

86. The method of claim 60, wherein the probe includes at least one source that emits light on a first area of an outer surface of the article, wherein the probe includes at least one receiver that receives light reflected from a second area of the outer surface of the article, wherein the step of measuring optical properties of the bulk material includes at least one measurement taken when the first area does not intersect with the second area.