CA2188487C - System and method of improving the signal to noise ratio of bar code and indicia scanners that utilize fluorescent inks - Google Patents
System and method of improving the signal to noise ratio of bar code and indicia scanners that utilize fluorescent inks Download PDFInfo
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- CA2188487C CA2188487C CA002188487A CA2188487A CA2188487C CA 2188487 C CA2188487 C CA 2188487C CA 002188487 A CA002188487 A CA 002188487A CA 2188487 A CA2188487 A CA 2188487A CA 2188487 C CA2188487 C CA 2188487C
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- indicia
- ink
- code
- lighting
- phosphorescent
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/80—Recognising image objects characterised by unique random patterns
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/12—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using a selected wavelength, e.g. to sense red marks and ignore blue marks
Abstract
A bar code and/or indicia scanning method that is able to determine what light was emitted from an upper layer invisible bar code and/or upper layer invisible indicia and what light was reflected back to the detector from avisible lower layer bar code and/or visible lower layer indicia. The detecting is "blind" to the spectra of the excitation source. Rather than differentiate between the exciter and emitter in the spectral domain, this invention differentiates between the exciter and the emitter in the time domain. The latency and persistence of the phosphorescent pigments of the invisible ink are used so that the detected signal is only the signal emitted by the upper layer invisible ink after the light source is turned off. Illumination and detection are synchronized to reduce the effects of reflection to zero so that the detector need not be chosen to be blind to the exciter. The foregoing is particularly suited to LED and laser illumination where the light source may be easily turned on and off.
Description
,,..... E-252 218~~.$7 SYSTEM AND METHOD OF IMPROVING THE SIGNAL TO NOISE RATIO
OF BAR CODE AND INDICIA SCANNERS THAT UTILIZE FLUORESCENT
INKS
Field of the Invention s The invention relates generally to the field of detecting information that was printed on documents and more particularly to detecting bar codes and indicia that have been printed on documents with fluorescent inks.
Background of the Invention Bar codes have been used in a wide variety of applications as a io source for information. Typically bar codes are used at a point-of-sale terminal in merchandising for pricing and inventory control. Bar codes are also used in controlling personnel access systems, mailing systems, and in manufacturing for work-in process and inventory control systems, etc. The bar codes themselves represent alphanumeric characters by series of is adjacent stripes of various widths, i.e. the universal product code.
A bar code is a set of binary numbers. It consists of black bars and white spaces. A wide black bar space signifies a one and a thin black bar or space signifies a zero. The binary numbers stand for decimal numbers or letters. There are several different kinds of bar codes. In each one, a 2o number, letter or other character is formed by a certain number or bars and spaces.
Bar code reading systems or scanners have been developed to read bar codes. The bar code may be read by having a light beam translated across the bar code and a portion of the light illuminating the bar code is 2s reflected and collected by a scanner. The intensity of the reflected light is proportional to the reflectance of the area illuminated by the light beam.
Thus, the scanners read the difference between the light and dark bars by l __ 2 __ ,.
OF BAR CODE AND INDICIA SCANNERS THAT UTILIZE FLUORESCENT
INKS
Field of the Invention s The invention relates generally to the field of detecting information that was printed on documents and more particularly to detecting bar codes and indicia that have been printed on documents with fluorescent inks.
Background of the Invention Bar codes have been used in a wide variety of applications as a io source for information. Typically bar codes are used at a point-of-sale terminal in merchandising for pricing and inventory control. Bar codes are also used in controlling personnel access systems, mailing systems, and in manufacturing for work-in process and inventory control systems, etc. The bar codes themselves represent alphanumeric characters by series of is adjacent stripes of various widths, i.e. the universal product code.
A bar code is a set of binary numbers. It consists of black bars and white spaces. A wide black bar space signifies a one and a thin black bar or space signifies a zero. The binary numbers stand for decimal numbers or letters. There are several different kinds of bar codes. In each one, a 2o number, letter or other character is formed by a certain number or bars and spaces.
Bar code reading systems or scanners have been developed to read bar codes. The bar code may be read by having a light beam translated across the bar code and a portion of the light illuminating the bar code is 2s reflected and collected by a scanner. The intensity of the reflected light is proportional to the reflectance of the area illuminated by the light beam.
Thus, the scanners read the difference between the light and dark bars by l __ 2 __ ,.
2 ~ ~84~7 reading the absences of reflected light This light is converted into an electric current signal and then the signal is decoded.
Bar codes have been affixed to many different types of documents, so that they may be read by a machine, thereby reducing labor costs.
s Documents that include bar codes and/or indicia have been issued by governmental agencies, financial institutions, brokerage houses, etc., that authorize the holder of such documents to perform authorized tasks or grant rights to the holder of such a document. Examples of such documents are drivers licenses, entry access badges, identification cards, etc.
io Bar codes and indicia have been printed on documents with transparent or invisible inks in order to place additional information on the documents and/or to make it more difficult to counterfeit the document. A
lower layer bar code and/or lower layer indicia may be printed on a document with a fluorescent ink or a conventional ink and a upper layer bar code and/or is upper layer indicia may be printed on top of the lower layer bar code and/or lower layer indicia with a invisible fluorescent ink or a conventional ink.
The lower layer bar code andlor indicia is read during one period of time and the upper layer bar code and/or indicia is read during another period of time.
One of the problems encountered by the prior art is that the 2o background printing effects the signal to noise ratio of the detection of the invisible printing of the upper layer bar code and/or indicia. The reason for the above is that the detectors that are utilized to detect the emitted signal from the invisible ink of the upper layer bar code and/or upper indicia detect spurious reflections of the illuminated light source. Thus, the detectors have 2s difficulty in determining what light was emitted from the upper layer invisible bar code and/or upper layer invisible indicia and what light was reflected back to the detector from the visible lower layer bar code and/or visible lower layer indicia.
Another problem encountered by the prior art is that paper as well as 3o conventional color inks often contain fluorescent brightners which when ,,,.,, __ 3 __ 2 ~ 8 8 4-~?
illuminated by an excitation source for the purpose of reading the printed material fluoresce and obscure the signal from the invisible ink signal. Thus, it is difficult to read the upper layer invisible bar code and/or upper layer invisible indicia and the visible lower layer bar code and/or visible lower layer indicia, since the signal coming from the upper layer invisible ink is mixed with the background fluorescent signal.
Summary of the Invention This invention overcomes the disadvantages of the prior art by providing a bar code and/or indicia scanner detector that is able to determine io what light was emitted from the upper layer invisible bar code and/or upper layer invisible indicia and what light was reflected back to the detector from the visible lower layer bar code and/or visible lower layer indicia. The detector and source are chosen such that the scanner detector is "blind" to the spectra of the excitation source. Rather than differentiate between the is exciter and emitter in the spectral domain, this invention differentiates between the exciter and the emitter in the time domain. The latency and persistence of the phosphorescent pigments of the invisible ink are used so that the detected signal is only the signal emitted by the upper layer invisible ink after the light source is turned off. Illumination and detection are 2o synchronized to reduce the effects of reflection to zero so that the detector need not be chosen to be blind to the exciter. The foregoing is particularly suited to LED and laser illumination where the light source may be easily and instantaneously strobed.
This invention also makes it more difficult to counterfeit informational 2s material that is part of, affixed to or printed on an object. The foregoing may be accomplished by: printing alphanumeric material on an object with a normal colored ink: printing a first portion of a symbol and/or code on an object with a fluorescent ink; printing a second portion of a symbol and/or code on an object with a phosphorescent ink; and reading the portions of the __ 4 __ object that were printed with different inks. The reason why the above is true is that the informational material is more difficult to counterfeit. The human eye is unable to distinguish between informational material printed with a fluorescent ink and informational material printed with phosphorescent ink.
It is an aspect of the present invention to provide a method for differentiating between signals radiated or emitted by one or more inks that are affixed to or are printed on an object in order to supply information to an observer and appear to the human eye to be a single image, said method includes the steps of:
a) supplying light to one or more inks, wherein at least one of the inks is phosphorescent and is invisible to the human eye;
b) removing the light supplied in step a);
c) synchronizing detection of the light emitted or radiated by the ink with the removal of the light emitted or radiated from the inks; and d) detecting each of the signals emitted or radiated by the inks during different time intervals resulting from the latency and persistence of phosphorescent materials in the inks.
It is yet another aspect of the present invention to provide a method for detecting a code and/or indicia that are affixed to or are printed on an object in order to supply information to an observer, said method includes the steps of:
turning on a light source to illuminate a code and/or indicia;
turning off the light source that illuminated the code andlor indicia;
synchronizing the turning off of the light source with the detection of the light emitted or radiated by the code and or indicia with the removal of the light; and detecting the code and/or indicia resulting from the latency and persistence of the code and/or indicia.
Brief Description of the Drawings Fig. 1 is a block diagram of the apparatus of this invention;
Fig..2 is a drawing of informational material that is printed with a normal coloured ink, i.e. black ink, a fluorescent ink and a phosphorescent ink;
Fig. 3 is a graph of the amplitude of the visible and invisible inks vs. time detector 15 and light source 13 is turned on and off; and Fig. 4 is a timing diagram of the time in which detector 15 is turned on and off and the detected signals are detected.
. 21 88487 -- 4a --Detailed Description of the Preferred Embodiment .
Referring now to the drawings in detail and more particularly to Fig. 1, the reference character 11 represents a substrate that has informational material affixed thereto. The informational material was printed on substrate 11 with a phosphorescent ink 12.
Phosphorescent inks containing 5% YPV-Ytterium phosphovanadate Europium doped Y
(P,V) 04 or 5% Ytterium OxySulfide Europium doped Y202S:Eu in water are examples of ink 12. In k12 is illuminated by a light source 13. Source 13 may be a lamp, light emitting diode, laser, or xenon flash lamp, etc. Light source 13 is coupled to light source drive electronics 14. Drive electronics 14 supplies power to excite light source 13 and source 13 when activated causes ink 12 to phosphoresce. Electronics 14 may be the driver manufactured by Motorola or the CZEU101 driver manufactured by Solitron. Detector 15 detects the light emitted by ink 12. Detector 15 may be a charged coupled device, phototransistor array or photomultiplier, etc.
,.-. 2188487__5__ Detector 15 is coupled to detector electronics 16. Electronics 16 supplies power and proper electrical voltage for detector 15. Detector 15 may be the TC211 detector manufactured by Texas Instruments and detection electronics 16 may be the model no. SN28846DW CCD driver manufactured s by Texas Instruments. Detection electronics 16 is coupled to timing control electronics 18 and signal processor 19. Timing control electronics 18 synchronizes drive electronics 14 with detection electronics 16 so that electronics 16 will detect light emitted from ink 12 when light source 13 is turned off. Timing control electronics 18 may be the 80486 microprocessor io manufactured by Intel. Signal processor 19 is coupled to decoding processor 20. Signal processor 19 extracts the signal detected by detector 15 and decoding processor 20 decodes the extracted signal. Signal processor 19 may be the 80386 manufactured by Intel and decoding processor 20 may be the model no. HBCR 2210 or the HBCR221 decoding processor is manufactured by Hewlett Packard.
Fig. 2 is a drawing of informational material that is printed with a normal colored ink, a fluorescent ink and a phosphorescent ink. The informational material may be in the form of postal indicia 24. Postal indicia 24 contains a dollar amount 25, the date 26 that the postal indicia was affixed Zo to a mail piece, the place the mail piece was mailed from 27, the postal meter serial number 16, and a bar code 29. Portions of indicia 24 are printed with a colored ink. Other portions of indicia 24 are printed with a fluorescent ink and the remaining portions of indicia 24 are printed with a phosphorescent ink.
Fig. 3 is a graph of the amplitude of the visible ink signal 21, the 2s invisible fluorescent ink signal 22 and the invisible phosphorescent ink signal 23 vs. the time detector 15 and light source 13 of Fig. 1 are turned on and off. The invisible and visible ink signals will be able to be detected by detector 15 when they have a amplitude that is able to be detected by detector 15 and the invisible and visible ink signals will not be able to be 3o detected by detector 15 when they have a amplitude that is not able to be .~. __6__ ~ 1 g84~7 detected by detector 15. A background check will normally be performed on detector 15 (Fig. 4) during the interval of time befinreen t-, and t-2. Light source 13 will be turned on and have its maximum amplitude at time to and light source 13 will be turned off and detector 15 will be looking at the emitted s signal at time t,. Detector 15 will not be looking for the emitted signal at time t2. Thus, during the interval of time between t, and tz , the invisible ink signals 22 and 23 will be able to be detected by detector 15 and the visible ink signal 21 will not be able to be detected by detector 15. If detector 15 is looking for a emitted signal during the interval of time between t3 and t4, detector 15 will io only be able to detect the phosphorescent ink signal 23.
The above specification describes a new and improved method for differentiating between signals radiated or emitted by normal visible inks, invisible fluorescent inks and invisible phosphorescent inks. It is realized that the above description may indicate to those skilled in the art additional ways is in which the principles of this invention may be used without departing from the spirit. It is, therefore, intended that this invention be limited only by the scope of the appended claims.
Bar codes have been affixed to many different types of documents, so that they may be read by a machine, thereby reducing labor costs.
s Documents that include bar codes and/or indicia have been issued by governmental agencies, financial institutions, brokerage houses, etc., that authorize the holder of such documents to perform authorized tasks or grant rights to the holder of such a document. Examples of such documents are drivers licenses, entry access badges, identification cards, etc.
io Bar codes and indicia have been printed on documents with transparent or invisible inks in order to place additional information on the documents and/or to make it more difficult to counterfeit the document. A
lower layer bar code and/or lower layer indicia may be printed on a document with a fluorescent ink or a conventional ink and a upper layer bar code and/or is upper layer indicia may be printed on top of the lower layer bar code and/or lower layer indicia with a invisible fluorescent ink or a conventional ink.
The lower layer bar code andlor indicia is read during one period of time and the upper layer bar code and/or indicia is read during another period of time.
One of the problems encountered by the prior art is that the 2o background printing effects the signal to noise ratio of the detection of the invisible printing of the upper layer bar code and/or indicia. The reason for the above is that the detectors that are utilized to detect the emitted signal from the invisible ink of the upper layer bar code and/or upper indicia detect spurious reflections of the illuminated light source. Thus, the detectors have 2s difficulty in determining what light was emitted from the upper layer invisible bar code and/or upper layer invisible indicia and what light was reflected back to the detector from the visible lower layer bar code and/or visible lower layer indicia.
Another problem encountered by the prior art is that paper as well as 3o conventional color inks often contain fluorescent brightners which when ,,,.,, __ 3 __ 2 ~ 8 8 4-~?
illuminated by an excitation source for the purpose of reading the printed material fluoresce and obscure the signal from the invisible ink signal. Thus, it is difficult to read the upper layer invisible bar code and/or upper layer invisible indicia and the visible lower layer bar code and/or visible lower layer indicia, since the signal coming from the upper layer invisible ink is mixed with the background fluorescent signal.
Summary of the Invention This invention overcomes the disadvantages of the prior art by providing a bar code and/or indicia scanner detector that is able to determine io what light was emitted from the upper layer invisible bar code and/or upper layer invisible indicia and what light was reflected back to the detector from the visible lower layer bar code and/or visible lower layer indicia. The detector and source are chosen such that the scanner detector is "blind" to the spectra of the excitation source. Rather than differentiate between the is exciter and emitter in the spectral domain, this invention differentiates between the exciter and the emitter in the time domain. The latency and persistence of the phosphorescent pigments of the invisible ink are used so that the detected signal is only the signal emitted by the upper layer invisible ink after the light source is turned off. Illumination and detection are 2o synchronized to reduce the effects of reflection to zero so that the detector need not be chosen to be blind to the exciter. The foregoing is particularly suited to LED and laser illumination where the light source may be easily and instantaneously strobed.
This invention also makes it more difficult to counterfeit informational 2s material that is part of, affixed to or printed on an object. The foregoing may be accomplished by: printing alphanumeric material on an object with a normal colored ink: printing a first portion of a symbol and/or code on an object with a fluorescent ink; printing a second portion of a symbol and/or code on an object with a phosphorescent ink; and reading the portions of the __ 4 __ object that were printed with different inks. The reason why the above is true is that the informational material is more difficult to counterfeit. The human eye is unable to distinguish between informational material printed with a fluorescent ink and informational material printed with phosphorescent ink.
It is an aspect of the present invention to provide a method for differentiating between signals radiated or emitted by one or more inks that are affixed to or are printed on an object in order to supply information to an observer and appear to the human eye to be a single image, said method includes the steps of:
a) supplying light to one or more inks, wherein at least one of the inks is phosphorescent and is invisible to the human eye;
b) removing the light supplied in step a);
c) synchronizing detection of the light emitted or radiated by the ink with the removal of the light emitted or radiated from the inks; and d) detecting each of the signals emitted or radiated by the inks during different time intervals resulting from the latency and persistence of phosphorescent materials in the inks.
It is yet another aspect of the present invention to provide a method for detecting a code and/or indicia that are affixed to or are printed on an object in order to supply information to an observer, said method includes the steps of:
turning on a light source to illuminate a code and/or indicia;
turning off the light source that illuminated the code andlor indicia;
synchronizing the turning off of the light source with the detection of the light emitted or radiated by the code and or indicia with the removal of the light; and detecting the code and/or indicia resulting from the latency and persistence of the code and/or indicia.
Brief Description of the Drawings Fig. 1 is a block diagram of the apparatus of this invention;
Fig..2 is a drawing of informational material that is printed with a normal coloured ink, i.e. black ink, a fluorescent ink and a phosphorescent ink;
Fig. 3 is a graph of the amplitude of the visible and invisible inks vs. time detector 15 and light source 13 is turned on and off; and Fig. 4 is a timing diagram of the time in which detector 15 is turned on and off and the detected signals are detected.
. 21 88487 -- 4a --Detailed Description of the Preferred Embodiment .
Referring now to the drawings in detail and more particularly to Fig. 1, the reference character 11 represents a substrate that has informational material affixed thereto. The informational material was printed on substrate 11 with a phosphorescent ink 12.
Phosphorescent inks containing 5% YPV-Ytterium phosphovanadate Europium doped Y
(P,V) 04 or 5% Ytterium OxySulfide Europium doped Y202S:Eu in water are examples of ink 12. In k12 is illuminated by a light source 13. Source 13 may be a lamp, light emitting diode, laser, or xenon flash lamp, etc. Light source 13 is coupled to light source drive electronics 14. Drive electronics 14 supplies power to excite light source 13 and source 13 when activated causes ink 12 to phosphoresce. Electronics 14 may be the driver manufactured by Motorola or the CZEU101 driver manufactured by Solitron. Detector 15 detects the light emitted by ink 12. Detector 15 may be a charged coupled device, phototransistor array or photomultiplier, etc.
,.-. 2188487__5__ Detector 15 is coupled to detector electronics 16. Electronics 16 supplies power and proper electrical voltage for detector 15. Detector 15 may be the TC211 detector manufactured by Texas Instruments and detection electronics 16 may be the model no. SN28846DW CCD driver manufactured s by Texas Instruments. Detection electronics 16 is coupled to timing control electronics 18 and signal processor 19. Timing control electronics 18 synchronizes drive electronics 14 with detection electronics 16 so that electronics 16 will detect light emitted from ink 12 when light source 13 is turned off. Timing control electronics 18 may be the 80486 microprocessor io manufactured by Intel. Signal processor 19 is coupled to decoding processor 20. Signal processor 19 extracts the signal detected by detector 15 and decoding processor 20 decodes the extracted signal. Signal processor 19 may be the 80386 manufactured by Intel and decoding processor 20 may be the model no. HBCR 2210 or the HBCR221 decoding processor is manufactured by Hewlett Packard.
Fig. 2 is a drawing of informational material that is printed with a normal colored ink, a fluorescent ink and a phosphorescent ink. The informational material may be in the form of postal indicia 24. Postal indicia 24 contains a dollar amount 25, the date 26 that the postal indicia was affixed Zo to a mail piece, the place the mail piece was mailed from 27, the postal meter serial number 16, and a bar code 29. Portions of indicia 24 are printed with a colored ink. Other portions of indicia 24 are printed with a fluorescent ink and the remaining portions of indicia 24 are printed with a phosphorescent ink.
Fig. 3 is a graph of the amplitude of the visible ink signal 21, the 2s invisible fluorescent ink signal 22 and the invisible phosphorescent ink signal 23 vs. the time detector 15 and light source 13 of Fig. 1 are turned on and off. The invisible and visible ink signals will be able to be detected by detector 15 when they have a amplitude that is able to be detected by detector 15 and the invisible and visible ink signals will not be able to be 3o detected by detector 15 when they have a amplitude that is not able to be .~. __6__ ~ 1 g84~7 detected by detector 15. A background check will normally be performed on detector 15 (Fig. 4) during the interval of time befinreen t-, and t-2. Light source 13 will be turned on and have its maximum amplitude at time to and light source 13 will be turned off and detector 15 will be looking at the emitted s signal at time t,. Detector 15 will not be looking for the emitted signal at time t2. Thus, during the interval of time between t, and tz , the invisible ink signals 22 and 23 will be able to be detected by detector 15 and the visible ink signal 21 will not be able to be detected by detector 15. If detector 15 is looking for a emitted signal during the interval of time between t3 and t4, detector 15 will io only be able to detect the phosphorescent ink signal 23.
The above specification describes a new and improved method for differentiating between signals radiated or emitted by normal visible inks, invisible fluorescent inks and invisible phosphorescent inks. It is realized that the above description may indicate to those skilled in the art additional ways is in which the principles of this invention may be used without departing from the spirit. It is, therefore, intended that this invention be limited only by the scope of the appended claims.
Claims (16)
1. A method for differentiating between signals radiated or emitted by one or more inks that are affixed to or are printed on an object in order to supply information to an observer and appear to the human eye to be a single image, said method includes the steps of:
a) supplying light to one or more inks, wherein at least one of the inks is phosphorescent and is invisible to the human eye;
b) removing the light supplied in step a);
c) synchronizing detection of the light emitted or radiated by the ink with the removal of the light emitted or radiated from the inks; and d) detecting each of the signals emitted or radiated by the inks during different time intervals resulting from the latency and persistence of phosphorescent materials in the inks.
a) supplying light to one or more inks, wherein at least one of the inks is phosphorescent and is invisible to the human eye;
b) removing the light supplied in step a);
c) synchronizing detection of the light emitted or radiated by the ink with the removal of the light emitted or radiated from the inks; and d) detecting each of the signals emitted or radiated by the inks during different time intervals resulting from the latency and persistence of phosphorescent materials in the inks.
2. The method of claim 1, wherein the lighting step further includes:
lighting matter produced by a fluorescent ink; and lighting matter produced by the phosphorescent ink.
lighting matter produced by a fluorescent ink; and lighting matter produced by the phosphorescent ink.
3. The method of claim 2, wherein the lighting step further includes:
lighting matter produced by a normal ink.
lighting matter produced by a normal ink.
4. The method of claim 1, wherein the lighting step further includes:
lighting matter produced by a normal ink; and lighting matter produced by the phosphorescent ink.
lighting matter produced by a normal ink; and lighting matter produced by the phosphorescent ink.
5. The method of claim 4, wherein the lighting step further includes:
lighting matter produced by a fluorescent ink.
lighting matter produced by a fluorescent ink.
6. The method of claim 1, wherein the lighting step further includes:
lighting matter produced by a normal ink; and lighting matter produced by a fluorescent ink.
lighting matter produced by a normal ink; and lighting matter produced by a fluorescent ink.
7. The method of claim 6, wherein the lighting step further includes:
lighting matter produced by the phosphorescent ink.
lighting matter produced by the phosphorescent ink.
8. The method of claim 1, further including the step of:
decoding the emitted and/or radiated signal in order to determine what information is being supplied by the inks.
decoding the emitted and/or radiated signal in order to determine what information is being supplied by the inks.
9. A method for detecting a code and/or indicia that are affixed to or are printed on an object in order to supply information to an observer, said method includes the steps of:
turning on a light source to illuminate a code and/or indicia;
turning off the light source that illuminated the code and/or indicia;
synchronizing the turning off of the light source with the detection of the light emitted or radiated by the code and or indicia with the removal of the light; and detecting the code and/or indicia resulting from the latency and persistence of the code and/or indicia.
turning on a light source to illuminate a code and/or indicia;
turning off the light source that illuminated the code and/or indicia;
synchronizing the turning off of the light source with the detection of the light emitted or radiated by the code and or indicia with the removal of the light; and detecting the code and/or indicia resulting from the latency and persistence of the code and/or indicia.
10. The method of claim 9, further including the step of: printing the code and/or indicia with a phosphorescent ink.
11. The method of claim 9, further including the step of: printing a portion of the code and/or indicia with a phosphorescent ink.
12. The method of claim 9, further including the step of:
printing a portion of the code and/or indicia with a phosphorescent ink; and printing a portion of the code and/or indicia with a phosphorescent ink, normal visible ink, a invisible fluorescent ink, and a invisible phosphorescent.
printing a portion of the code and/or indicia with a phosphorescent ink; and printing a portion of the code and/or indicia with a phosphorescent ink, normal visible ink, a invisible fluorescent ink, and a invisible phosphorescent.
13. The method of claim 9, further including the step of:
printing a upper level code over a lower level code.
printing a upper level code over a lower level code.
14. The method of claim 9, further including the step of printing a upper level indicia over a lower level indicia.
15. The method of claim 9, further including the step of:
printing a upper level code over a lower level indicia.
printing a upper level code over a lower level indicia.
16. The method of claim 9, further including the step of printing a upper level indicia over a lower level code.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/553,730 US5861618A (en) | 1995-10-23 | 1995-10-23 | System and method of improving the signal to noise ratio of bar code and indicia scanners that utilize fluorescent inks |
| US08/553,730 | 1995-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2188487A1 CA2188487A1 (en) | 1997-04-24 |
| CA2188487C true CA2188487C (en) | 2000-03-28 |
Family
ID=24210512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002188487A Expired - Fee Related CA2188487C (en) | 1995-10-23 | 1996-10-22 | System and method of improving the signal to noise ratio of bar code and indicia scanners that utilize fluorescent inks |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5861618A (en) |
| EP (1) | EP0770969B1 (en) |
| CA (1) | CA2188487C (en) |
| DE (1) | DE69631504T2 (en) |
Families Citing this family (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6232124B1 (en) | 1996-05-06 | 2001-05-15 | Verification Technologies, Inc. | Automated fingerprint methods and chemistry for product authentication and monitoring |
| US5996893A (en) * | 1997-10-28 | 1999-12-07 | Eastman Kodak Company | Method and apparatus for visually identifying an area on a photograph or image where digital data is stored |
| US6669093B1 (en) * | 1997-12-19 | 2003-12-30 | Telxon Corporation | Hand-held dataform reader having multiple target area illumination sources for independent reading of superimposed dataforms |
| US6123263A (en) * | 1998-01-29 | 2000-09-26 | Meta Holdings Corporation | Hand held dataform reader having strobing ultraviolet light illumination assembly for reading fluorescent dataforms |
| US6354501B1 (en) * | 1998-11-18 | 2002-03-12 | Crossoff Incorporated | Composite authentication mark and system and method for reading the same |
| US6177683B1 (en) * | 1998-11-25 | 2001-01-23 | C2It, Inc. | Portable viewer for invisible bar codes |
| US6490030B1 (en) | 1999-01-18 | 2002-12-03 | Verification Technologies, Inc. | Portable product authentication device |
| US6209933B1 (en) | 1999-04-19 | 2001-04-03 | Daimlerchrysler Corporation | Trunk release handle |
| US6354502B1 (en) | 1999-04-23 | 2002-03-12 | Primera Technology, Inc. | Continuous color tone infrared detected barcodes |
| US6353479B1 (en) * | 1999-06-29 | 2002-03-05 | Hewlett-Packard Company | Media-type encoding and print mode selection |
| US6402986B1 (en) | 1999-07-16 | 2002-06-11 | The Trustees Of Boston University | Compositions and methods for luminescence lifetime comparison |
| US6775381B1 (en) | 1999-07-19 | 2004-08-10 | Eastman Kodak Company | Method and apparatus for editing and reading edited invisible encodements on media |
| US6542622B1 (en) | 1999-08-30 | 2003-04-01 | Eastman Kodak Company | Methods and articles for determining invisible ink print quality |
| US6688525B1 (en) | 1999-09-22 | 2004-02-10 | Eastman Kodak Company | Apparatus and method for reading a coded pattern |
| US6512580B1 (en) | 1999-10-27 | 2003-01-28 | Verification Technologies, Inc. | Method and apparatus for portable product authentication |
| US20030112423A1 (en) * | 2000-04-24 | 2003-06-19 | Rakesh Vig | On-line verification of an authentication mark applied to products or product packaging |
| US20040000787A1 (en) * | 2000-04-24 | 2004-01-01 | Rakesh Vig | Authentication mark for a product or product package |
| US7124944B2 (en) * | 2000-06-30 | 2006-10-24 | Verification Technologies, Inc. | Product packaging including digital data |
| WO2002002301A1 (en) | 2000-06-30 | 2002-01-10 | Verification Technologies Inc. | Copy-protected optical media and method of manufacture thereof |
| US6638593B2 (en) | 2000-06-30 | 2003-10-28 | Verification Technologies, Inc. | Copy-protected optical media and method of manufacture thereof |
| US7660415B2 (en) * | 2000-08-03 | 2010-02-09 | Selinfreund Richard H | Method and apparatus for controlling access to storage media |
| US20030062422A1 (en) * | 2001-09-10 | 2003-04-03 | Fateley William G. | System and method for encoded spatio-spectral information processing |
| US20040046874A1 (en) * | 2001-11-15 | 2004-03-11 | Ming-Kai Tse | Miniaturized photosensing instrumentation system |
| US7044386B2 (en) * | 2002-02-05 | 2006-05-16 | William Berson | Information encoding on surfaces by varying spectral emissivity |
| US20050084645A1 (en) * | 2002-02-07 | 2005-04-21 | Selinfreund Richard H. | Method and system for optical disc copy-protection |
| WO2003105075A1 (en) * | 2002-06-07 | 2003-12-18 | Trustees Of Boston University | System and methods for product and document authentication |
| EP1380982A1 (en) * | 2002-07-08 | 2004-01-14 | Sicpa Holding S.A. | Method and device for coding articles |
| US20040023397A1 (en) * | 2002-08-05 | 2004-02-05 | Rakesh Vig | Tamper-resistant authentication mark for use in product or product packaging authentication |
| US20040118931A1 (en) * | 2002-09-26 | 2004-06-24 | Selinfreund Richard H. | Authentication of items using transient optical state change materials |
| DE10252628A1 (en) * | 2002-11-11 | 2004-05-19 | Forschungszentrum Jülich GmbH | Procedure to encode information using fluorescent colors to print encoded data |
| US20060203700A1 (en) * | 2003-02-06 | 2006-09-14 | Verification Technologies, Inc. | Method and system for optical disk copy-protection |
| US7422158B2 (en) * | 2003-10-24 | 2008-09-09 | Pitney Bowes Inc. | Fluorescent hidden indicium |
| US7407195B2 (en) * | 2004-04-14 | 2008-08-05 | William Berson | Label for receiving indicia having variable spectral emissivity values |
| US8110281B2 (en) * | 2004-07-02 | 2012-02-07 | 3Dtl, Inc. | Systems and methods for creating optical effects on media |
| DE102004046618A1 (en) * | 2004-09-25 | 2006-03-30 | Robert Bosch Gmbh | Circuit arrangement for analog / digital conversion |
| US7651031B2 (en) * | 2004-10-25 | 2010-01-26 | William Berson | Systems and methods for reading indicium |
| US7621451B2 (en) | 2005-01-14 | 2009-11-24 | William Berson | Radio frequency identification labels and systems and methods for making the same |
| US7619520B2 (en) * | 2005-01-14 | 2009-11-17 | William Berson | Radio frequency identification labels and systems and methods for making the same |
| US7728726B2 (en) * | 2005-01-14 | 2010-06-01 | William Berson | Radio frequency identification labels |
| US7931413B2 (en) * | 2005-01-14 | 2011-04-26 | William Berson | Printing system ribbon including print transferable circuitry and elements |
| US7878615B2 (en) * | 2005-12-14 | 2011-02-01 | Pitney Bowes Inc. | System and method for detecting defective ink jet nozzles |
| US8833691B1 (en) | 2007-12-21 | 2014-09-16 | Georgia-Pacific Consumer Products Lp | Product, dispenser and method of dispensing product |
| AU2008345678A1 (en) * | 2007-12-21 | 2009-07-09 | Georgia-Pacific Consumer Products Lp | Product, dispenser and method of dispensing product |
| JP2015527898A (en) * | 2012-06-29 | 2015-09-24 | ケイ‐フィー システム ゲーエムベーハー | Single dose capsule with identifier inside |
| AU2014283278B2 (en) * | 2013-06-19 | 2016-06-30 | K-Fee System Gmbh | Single serve capsule having a fluorescent and/or phosphorescent identifier |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3483388A (en) * | 1964-09-02 | 1969-12-09 | Burroughs Corp | Apparatus for generating signals indicative of the persistence characteristics of substances made radiant by energizing radiation |
| US4058732A (en) * | 1975-06-30 | 1977-11-15 | Analytical Radiation Corporation | Method and apparatus for improved analytical fluorescent spectroscopy |
| JPS56127277A (en) * | 1980-03-10 | 1981-10-05 | Nec Corp | Automatic discriminator for pattern of fluorescent and phosphorescent color materials |
| ES503112A0 (en) * | 1980-05-30 | 1982-04-01 | Gao Ges Automation Org | IMPROVEMENTS IN THE MANUFACTURE OF CURRENCY AND SIMI-LARES PAPER |
| US4480177A (en) * | 1981-02-18 | 1984-10-30 | Allen Milton F | Currency identification method |
| US5367148A (en) * | 1986-04-18 | 1994-11-22 | Cias, Inc. | Counterfeit detection using ID numbers with at least one random portion |
| US4791310A (en) * | 1986-10-02 | 1988-12-13 | Syracuse University | Fluorescence microscopy |
| US4983817A (en) * | 1989-03-01 | 1991-01-08 | Battelle Memorial Institute | Background compensating bar code readers |
| GB8910424D0 (en) * | 1989-05-05 | 1989-06-21 | Sunman Robert P | Security label |
| US5109153A (en) * | 1990-04-17 | 1992-04-28 | Johnsen Edward L | Flash imaging and voidable articles |
| US5210411A (en) * | 1990-06-29 | 1993-05-11 | Hitachi Maxell, Ltd. | Detection mark and method and apparatus for detecting mark |
| US5331140A (en) * | 1992-04-02 | 1994-07-19 | Xerox Corporation | Code reading systems |
| JPH06149578A (en) * | 1992-10-30 | 1994-05-27 | Nec Corp | Fuzzy inference device |
| CA2123456C (en) * | 1993-05-24 | 1998-09-15 | William Berson | Document authentication system utilizing a transparent label |
| US5418855A (en) * | 1993-09-27 | 1995-05-23 | Angstrom Technologies, Inc. | Authentication system and method |
| US5502304A (en) * | 1994-12-01 | 1996-03-26 | Pitney Bowes Inc. | Bar code scanner for reading a visible ink and a luminescent invisible ink |
| US5525798A (en) * | 1994-12-01 | 1996-06-11 | Pitney Bowes Inc. | Bar code scanner for reading a lower layer luminescent invisible ink that is printed below a upper layer luminescent invisible ink |
| US5542971A (en) * | 1994-12-01 | 1996-08-06 | Pitney Bowes | Bar codes using luminescent invisible inks |
| US5554842A (en) * | 1994-12-22 | 1996-09-10 | Pitney Bowes Inc. | Luminescent facing marks for enhanced postal indicia discrimination |
-
1995
- 1995-10-23 US US08/553,730 patent/US5861618A/en not_active Expired - Lifetime
-
1996
- 1996-10-22 CA CA002188487A patent/CA2188487C/en not_active Expired - Fee Related
- 1996-10-23 EP EP96117004A patent/EP0770969B1/en not_active Expired - Lifetime
- 1996-10-23 DE DE69631504T patent/DE69631504T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0770969A2 (en) | 1997-05-02 |
| DE69631504D1 (en) | 2004-03-18 |
| EP0770969B1 (en) | 2004-02-11 |
| EP0770969A3 (en) | 2001-04-25 |
| US5861618A (en) | 1999-01-19 |
| CA2188487A1 (en) | 1997-04-24 |
| DE69631504T2 (en) | 2004-09-23 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |