Method and apparatus for detecting and preventing counterfeiting

• US 6,249,339 B1
• Filed: 02/07/2000
• Issued: 06/19/2001
• Est. Priority Date: 07/01/1997
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: LJ Laboratories L.L.C.
• Inventors: Jung, Wayne D., Jung, Russell W., Loudermilk, Alan R.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): MERLINO, AMANDA H
• Application Number:
  US09/500,199
• Time in Patent Office: 498 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 whether an object is genuine, comprising the steps of:

measuring optical properties of the object at one or more locations with a probe, at least one of the one or more locations having a first region of material that is translucent or semitranslucent, wherein the measured optical properties include one or more properties not readily discernible from a visual inspection of the object, and wherein the probe includes at least one source that emits light on an outer surface of the object, wherein the probe includes at least one receiver that receives light from the object, wherein the measuring step generates optical characteristics data based on spectral characteristics of a second region of material that is under the first region of material; and

comparing the measured optical properties with recorded optical properties, wherein based on the comparison a determination is made whether the object is genuine.

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 the optical properties are measured a predetermined distance from a location marker on the object.

7. The method of claim 1, wherein where the one or more locations are located on the object is not identified on the object.

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 object comprises an art work.

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

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

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

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

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

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

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

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

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

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

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

23. The method of claim 1, wherein the object comprises a document on which a pigment-containing material is deposited, wherein the recorded optical properties are measured after the pigment-containing material is deposited, wherein the optical properties are measured at a time subsequent to the rime when the pigment-containing material is deposited.

24. The method of claim 23, wherein the pigment-containing material comprises paint.

25. The method of claim 23, wherein the pigment-containing material comprises ink.

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

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

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

29. A method for determining whether an object is genuine, comprising the steps of:

measuring optical properties of the object at one or more locations with a probe, at least one of the one or more locations having a first region of material that is translucent or semitranslucent, wherein the measured optical properties include a plurality of measurements including at least a first measurement when the probe is a first distance from the object and at least a second measurement when the probe is a second distance from the object and at least one measurement based on spectral characteristics of a second region of material that is under the first region of material; and

comparing the measured optical properties with recorded optical properties, wherein based on the comparison a determination is made whether the object is genuine.

30. The method of claim 29, wherein the probe includes at least one source that emits light on a first area of an outer surface of the object, wherein the probe includes at least one receiver that receives light reflected from a second area of the outer surface of the object, wherein the measuring step includes at least one measurement taken when the first area does not intersect with the second area.

31. The method of claim 29, wherein the plurality of measurements include measurements wherein the probe and the object are moving relative to each other.

32. The method of claim 29, 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.

33. The method of claim 32, wherein the source/receiver elements comprise fiber optic source/receiver elements.

34. The method of claim 29, 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.

35. The method of claim 29, wherein light received by the probe is coupled to one or more sensing elements comprising light-to-frequency converters.

36. The method of claim 29, wherein the optical properties are measured a predetermined distance from a location marker on the object.

37. The method of claim 29, wherein where the one or more locations are located on the object is not identified on the object.

38. The method of claim 29, wherein the determination is made based on one or more acceptance criteria.

39. The method of claim 38, wherein the acceptance criteria comprise a delta E value.

40. The method of claim 38, wherein the acceptance criteria comprise a threshold value.

41. The method of claim 29, wherein the object comprises an art work.

42. The method of claim 29, wherein the object comprises a painting.

43. The method of claim 29, wherein the object comprises a sculpture.

44. The method of claim 29, wherein the object comprises a passport.

45. The method of claim 29, wherein the object comprises a credit card.

46. The method of claim 29, wherein the object comprises a check.

47. The method of claim 29, wherein the object comprises a traveler'"'"'s check.

48. The method of claim 29, wherein the object comprises a security.

49. The method of claim 29, wherein the object comprises a stock certificate.

50. The method of claim 29, wherein the object comprises a bond.

51. The method of claim 29, wherein the object comprises currency.

52. The method of claim 29, wherein the object comprises a negotiable instrument.

53. The method of claim 29, wherein the object comprises a document on which a pigment-containing material is deposited, wherein the recorded optical properties are measured after the pigment-containing material is deposited, wherein the optical properties are measured at a time subsequent to the time when the pigment-containing material is deposited.

54. The method of claim 53, wherein the pigment-containing material comprises paint.

55. The method of claim 53, wherein the pigment-containing material comprises ink.

56. The method of claim 29, wherein the measured optical properties include translucency, wherein measured spectral properties are adjusted based on the measured translucency.

57. The method of claim 29, wherein the measured optical properties include gloss, wherein measured spectral properties are adjusted based on the measured gloss.

58. The method of claim 29, wherein the measured optical properties include translucency and gloss, wherein measured spectral properties are adjusted based on the measured translucency and gloss.