DE10133808A1 - Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light - Google Patents

Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light

Info

Publication number
DE10133808A1
DE10133808A1 DE2001133808 DE10133808A DE10133808A1 DE 10133808 A1 DE10133808 A1 DE 10133808A1 DE 2001133808 DE2001133808 DE 2001133808 DE 10133808 A DE10133808 A DE 10133808A DE 10133808 A1 DE10133808 A1 DE 10133808A1
Authority
DE
Germany
Prior art keywords
light
medium
optical brighteners
receiver
appearance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE2001133808
Other languages
German (de)
Inventor
Ingmar Brumm
Wolfgang Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Colorpartner Entwicklung GmbH
Original Assignee
Colorpartner Entwicklung GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colorpartner Entwicklung GmbH filed Critical Colorpartner Entwicklung GmbH
Priority to DE2001133808 priority Critical patent/DE10133808A1/en
Publication of DE10133808A1 publication Critical patent/DE10133808A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry

Abstract

Device for investigating the intensity of light generated by optical brighteners in light reflecting media, e.g. paper (2) has one or more UV light emitting diodes (1) that can emit light of possibly varying wavelengths in the UV range and a receiver (3) for visible light that is reflected from the surface. From knowledge of the emission behavior of the LED and the reflection behavior of the medium, the reflection behavior of the medium for the UV component of light can be derived.

Description

Die Erfindung betrifft eine Messvorrichtung zur Bestimmung der Intensität von optischen Aufhellern in Proben. The invention relates to a measuring device for determining the intensity of optical brighteners in Rehearse.

Papiere z. B. beinhalten oft optische Aufheller, um dem Betrachter eine strahlend weisse Oberfläche zu präsentieren. Dabei werden Anteile der von der Strahlungsquelle abgestrahlten Ultraviolett (UV)- Energie frequenzverschoben als hauptsächlich Blau im sichtbaren Licht von der Messprobe (z. B. Papier) zurückgestrahlt. Dieser zusätzliche Blauanteil läßt die Probe weniger gelb, sondern mehr weiß erscheinen. Zusätze in der Probe, die die Energie des auftreffenden UV-Lichtes zum langwelligeren Bereich hin abstrahlen lassen, nennt man optische Aufheller. Papers e.g. B. often include optical brighteners to give the viewer a bright white surface showcase. In doing so, portions of the ultraviolet (UV) emitted by the radiation source are Frequency shifted as mainly blue in visible light from the measurement sample (e.g. Paper). This additional blue component leaves the sample less yellow but more white appear. Additives in the sample that convert the energy of the incident UV light to the longer wavelength Blowing the area out is called optical brighteners.

Nun ist es von großem Nutzen, die Stärke dieses Aufheller-Effektes bei den verschiedenen Proben zu messen, um dies z. B. beim Bedrucken zu berücksichtigen. Now it is very useful to increase the strength of this brightening effect in the different samples measure to this z. B. to consider when printing.

Neu bei der hier beschriebenen Methode ist, dies mit Hilfe von Leuchtdioden zu machen, die nur oder auch Energie im UV-Bereich abstrahlen (unerwünschte Abstrahlung wird hier durch entsprechende optische Filter zurückgehalten). Diese Strahlung trifft auf die Probe und wird von ihr entsprechend ihrer Reflexionseigenschaften reflektiert. Diese Reflektion wird mit einem Sensor (Einzelsensor oder Fotospektrometer) gemessen, der im Wesenlichen das von der Probe reflektierte sichtbare Licht misst. In Zusammenhang mit Spektralfotometern läßt sich so auch das spezifische Reflexionsverhalten des optischen Aufhellers untersuchen. What is new about the method described here is to do this with the help of light-emitting diodes that only or also emit energy in the UV range (unwanted radiation is here by appropriate optical filters retained). This radiation hits the sample and is correspondingly used by it reflected their reflective properties. This reflection is with a sensor (single sensor or Photospectrometer), which is essentially the visible light reflected from the sample measures. In connection with spectrophotometers, the specific can also be so Examine the reflection behavior of the optical brightener.

Die mit dem Sensor gemessene Intensität ist also ein Maß für die Intensität des optischen Aufhellers in der Probe, wenn die UV-Intensität der Leuchtdiode bekannt ist (z. B. aus technischen Daten oder durch Vergleichsmessungen). The intensity measured with the sensor is therefore a measure of the intensity of the optical brightener in the sample if the UV intensity of the LED is known (e.g. from technical data or by comparative measurements).

Claims (2)

1. Messgerät zur Bestimmung des Reflexionsverhaltens von optischen Aufhellern nach obiger Beschreibung mit einer oder mehreren UV-abstrahlenden Leuchtdioden (LEDs). 1. Measuring device for determining the reflection behavior of optical brighteners according to the above Description with one or more UV-emitting diodes (LEDs). 2. Messvorrichtung nach obiger Beschreibung und nach Anspruch 1 in Verbindung mit oder eingebaut in Densitometern und Spektralfotometern zur besseren Berücksichtigung der optischen Aufheller im Messergebnis. 2. Measuring device according to the above description and according to claim 1 in conjunction with or built into densitometers and spectrophotometers for better consideration of the optical brightener in the measurement result.
DE2001133808 2001-07-11 2001-07-11 Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light Withdrawn DE10133808A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001133808 DE10133808A1 (en) 2001-07-11 2001-07-11 Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001133808 DE10133808A1 (en) 2001-07-11 2001-07-11 Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light

Publications (1)

Publication Number Publication Date
DE10133808A1 true DE10133808A1 (en) 2003-02-06

Family

ID=7691471

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001133808 Withdrawn DE10133808A1 (en) 2001-07-11 2001-07-11 Quantitative determination of the effect of optical brighteners on the appearance of a medium using an UV light emitting diode light source and a receiver for measuring corresponding reflected visible light

Country Status (1)

Country Link
DE (1) DE10133808A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533606A1 (en) * 2003-11-19 2005-05-25 Kansai Paint Co., Ltd. Device and method for measuring ultraviolet light diffusely reflected from an object

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4699510A (en) * 1984-11-07 1987-10-13 Measurex Corporation Color sensor
DE19525566A1 (en) * 1995-07-13 1997-01-16 Byk Gardner Gmbh Method and device for the optical characterization of a surface
DE19617009A1 (en) * 1996-04-27 1997-11-06 Roland Man Druckmasch Photoelectric measuring device
US5748304A (en) * 1994-01-28 1998-05-05 Conrex Automation Oy Measuring instrument for reflectometric measurements
EP0871025A1 (en) * 1997-04-09 1998-10-14 VIPTRONIC SrL Densitometric and spectrometric measurement method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4699510A (en) * 1984-11-07 1987-10-13 Measurex Corporation Color sensor
US5748304A (en) * 1994-01-28 1998-05-05 Conrex Automation Oy Measuring instrument for reflectometric measurements
DE19525566A1 (en) * 1995-07-13 1997-01-16 Byk Gardner Gmbh Method and device for the optical characterization of a surface
DE19617009A1 (en) * 1996-04-27 1997-11-06 Roland Man Druckmasch Photoelectric measuring device
EP0871025A1 (en) * 1997-04-09 1998-10-14 VIPTRONIC SrL Densitometric and spectrometric measurement method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533606A1 (en) * 2003-11-19 2005-05-25 Kansai Paint Co., Ltd. Device and method for measuring ultraviolet light diffusely reflected from an object

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee