DE4109521A1 - Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver - Google Patents

Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver

Info

Publication number
DE4109521A1
DE4109521A1 DE4109521A DE4109521A DE4109521A1 DE 4109521 A1 DE4109521 A1 DE 4109521A1 DE 4109521 A DE4109521 A DE 4109521A DE 4109521 A DE4109521 A DE 4109521A DE 4109521 A1 DE4109521 A1 DE 4109521A1
Authority
DE
Germany
Prior art keywords
sample
light
single receiver
reflected light
spectral photometer
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.)
Ceased
Application number
DE4109521A
Other languages
German (de)
Inventor
Johannes Dr Ing Fleischer
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.)
SAEGER MANFRED DIPL ING
Original Assignee
SAEGER MANFRED DIPL ING
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 SAEGER MANFRED DIPL ING filed Critical SAEGER MANFRED DIPL ING
Priority to DE4109521A priority Critical patent/DE4109521A1/en
Publication of DE4109521A1 publication Critical patent/DE4109521A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • 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
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/504—Goniometric colour measurements, for example measurements of metallic or flake based paints
    • 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
    • G01N21/55—Specular reflectivity
    • 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
    • G01N2021/4704—Angular selective
    • G01N2021/4711—Multiangle measurement
    • 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
    • G01N2021/4764—Special kinds of physical applications
    • G01N2021/4771—Matte surfaces with reflecting particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06146—Multisources for homogeneisation, as well sequential as simultaneous operation

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The photometer comprises a pcb (3), and light-emitting transmitters (2) positioned at various locations so that the sample is illuminated at various angles. A single receiver (1) measures the light reflected at a specific angle of reflection to form a measurement of colour. USE/ADVANTAGE - Measuring colours of samples, e.g. coated by lacquer giving metallic and pearl glaze effects. Cheaper and quicker since set of monochromators is not required nor does sample have to be moved.

Description

Die Erfindung betrifft ein Mehrwinkel-Spektralfotometer gemäß dem Oberbegriff des Hauptanspruchs.The invention relates to a multi-angle spectrophotometer according to the Preamble of the main claim.

Solche Spektralfotometer sind an sich bekannt.Such spectrophotometers are known per se.

Bei der einen Sorte dieser bekannten Geräte wird die Probe mit einem einzigen Sender blitzförmig beleuchtet, der einen bestimmten Winkel zur Probe aufweist. Gleichzeitig wird mittels mehrerer Empfänger das reflektierte Licht der Probe beobachtet.In one type of this known device, the sample with a single transmitter illuminated in a flash, which is at a certain angle Has sample. At the same time, the reflected is by means of several receivers Sample light observed.

Die andere Art von Spektralfotometern weist nur einen einzigen Sender und einen einzigen Empfänger auf. Hierbei wird zur Erzeugung verschiedener Meßgeometrien die Probe geschwenkt. Dies ist insoweit nachteilig, als bei Messung mit mehreren Empfängern aus mehreren Auftreffwinkeln gleichzeitig für jeden Winkel ein kompletter Monochromator zur Verfügung gestellt werden muß. Wegen der mechanischen Neupositionierung der Probe können ferner Meßfehler auftreten und ist die Messung arbeitsintensiv und zeitraubend.The other type of spectrophotometer has only one transmitter and a single recipient. This is used to generate various Geometry the sample swiveled. This is disadvantageous insofar as Measurement with several receivers from several angles of incidence at the same time a complete monochromator is provided for every angle must become. Because of the mechanical repositioning of the sample furthermore measurement errors occur and the measurement is labor intensive and time consuming.

Allen Geräten gemeinsam ist der Nachteil, daß sämtliche Monochromatoren untereinander gleich sein müssen und auch nicht verschiedenartig altern oder driften dürfen. Wegen der hohen Kosten der Monochromatoren und aus räumlichen Gründen ist die Zahl der Winkel meist auf drei Auftreffwinkel beschränkt.The disadvantage of all devices is that all monochromators must be identical to each other and not age differently or allowed to drift. Because of the high cost of monochromators and for spatial reasons, the number of angles is usually at three angles of incidence limited.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Spektralfotometer gemäß dem Oberbegriff des Hauptanspruchs einfacher und erheblich billiger so auszugestalten, daß die Messungen gleichwohl äußerst schnell erfolgen können.The invention has for its object a generic Spectrophotometer according to the preamble of the main claim easier and much cheaper to design so that the measurements nevertheless extremely can be done quickly.

Diese Aufgabe wird bei einem gattungsgemäßen Spektralfotometer gemäß dem Oberbegriff des Hauptanspruchs erfindungsgemäß durch dessen kennzeichnende Merkmale gelöst. This task is carried out in accordance with a generic spectrophotometer the preamble of the main claim according to the invention characteristic features solved.  

Erfindungsgemäß wird die Probe aus mehreren Auftreffwinkeln nacheinander mittels der Sender beleuchtet und mittels eines einzigen Empfängers das von der Probe reflektierte Licht gemessen. Da die Messungen sehr schnell erfolgen, ist die Gesamtzeit bei aufeinanderfolgenden Messungen durch aufeinanderfolgendes Senden von Lichtblitzen durch die Sender sehr gering, zum Beispiel 2 Sekunden bei acht Messungen. Ferner wird nur ein einziger teurer Empfänger, der vorzugsweise als Monochromator ausgebildet ist, benötigt. Die Sender können als Lampen in maximal zwei Ebenen angeordnet sein, so daß ein Einbau in einfacher Weise auf der Platine einer gedruckten Schaltung möglich ist. Hierbei können problemlos acht Lampen oder mehr eingesetzt werden.According to the invention, the sample is taken from several angles of incidence one after the other illuminated by means of the transmitter and by means of a single receiver light reflected from the sample is measured. Because the measurements are very quick the total time for successive measurements is complete consecutive transmission of flashes of light by the transmitters very low, for example 2 seconds for eight measurements. Furthermore, only one expensive receiver, which is preferably designed as a monochromator, needed. The transmitters can be arranged as lamps in a maximum of two levels be so that an installation in a simple manner on the printed circuit board Circuit is possible. Here, eight lamps or more can easily be used be used.

Zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Appropriate refinements and developments of the invention are in marked the subclaims.

Ein bevorzugtes Ausführungsbeispiel ist im schematischen Querschnitt in der Zeichnung dargestellt. Dort ist eine insgesamt mit 4 bezeichnete Probe vorgesehen. Mit Abstand über dieser Probe ist eine insgesamt mit 3 bezeichnete Platine als gedruckte Schaltung vorgesehen, auf der an verschiedenen Orten Sender 2 vorgesehen sind, so daß die Probe unter verschiedenen, strichpunktiert angedeuteten Winkeln beleuchtbar ist.A preferred embodiment is shown in schematic cross section in the drawing. There is a sample designated 4 in total. At a distance above this sample there is a printed circuit board, generally designated 3 , on which transmitters 2 are provided at different locations, so that the sample can be illuminated at different angles indicated by dash-dotted lines.

Ferner ist ein einziger Empfänger 1 vorgesehen, der das von der Probe 4 reflektierte Licht auch in einem bestimmten Reflexionswinkel mißt. Aufgrund dieser Mesung kann dann die Farbe gemessen werden.Furthermore, a single receiver 1 is provided, which also measures the light reflected by the sample 4 at a certain angle of reflection. The color can then be measured on the basis of this measurement.

Claims (4)

1. Mehrwinkel-Spektralfotometer, vorzugsweise zum Messen der Farbe von Proben, beispielsweise mit Metallic- und Perlglanzeffekten bei Lackschichten, wobei das von der Probe reflektierte Licht bei verschiedenen Winkeln zwischen das lichtabgebendem Sender und das reflektierte Licht aufnehmendem Empfänger gemessen und danach die Farbe bestimmt wird, dadurch gekennzeichnet, daß eine Vielzahl von Sendern (2) in verschiedenen Auftreffwinkeln mit Bezug auf die Probe (4) und daß nur ein einziger Empfänger (1) in einem definierten Winkel zur Probe (4) vorgesehen ist.1. Multi-angle spectrophotometer, preferably for measuring the color of samples, for example with metallic and pearlescent effects in lacquer layers, the light reflected by the sample being measured at different angles between the light-emitting transmitter and the reflected light-receiving receiver, and then the color is determined , characterized in that a plurality of transmitters ( 2 ) at different angles of incidence with respect to the sample ( 4 ) and that only a single receiver ( 1 ) is provided at a defined angle to the sample ( 4 ). 2. Fotometer nach Anspruch 1, dadurch gekennzeichnet, daß die Sender (2) in einer oder zwei Ebenen angeordnet sind. 2. Photometer according to claim 1, characterized in that the transmitters ( 2 ) are arranged in one or two levels. 3. Fotometer nach Anspruch 2, dadurch gekennzeichnet, daß die Sender auf einer Platine einer gedruckten Schaltung (3) angeordnet sind.3. Photometer according to claim 2, characterized in that the transmitters are arranged on a circuit board of a printed circuit ( 3 ). 4. Fotometer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Empfänger (1) als Monochromator ausgebildet ist.4. Photometer according to one of claims 1 to 3, characterized in that the receiver ( 1 ) is designed as a monochromator.
DE4109521A 1990-08-31 1991-03-22 Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver Ceased DE4109521A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4109521A DE4109521A1 (en) 1990-08-31 1991-03-22 Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4027694 1990-08-31
DE4109521A DE4109521A1 (en) 1990-08-31 1991-03-22 Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver

Publications (1)

Publication Number Publication Date
DE4109521A1 true DE4109521A1 (en) 1991-10-10

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Family Applications (1)

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DE4109521A Ceased DE4109521A1 (en) 1990-08-31 1991-03-22 Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver

Country Status (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571118A1 (en) * 1992-05-18 1993-11-24 Xerox Corporation Densitometer for measuring toner area coverage in a xerographic printer
US6891617B2 (en) 2002-09-18 2005-05-10 E.I. Du Pont De Nemours And Company Aspecular multi-angle protractor for evaluating a surface containing metallic particles
CN103884659A (en) * 2014-02-20 2014-06-25 南京邮电大学 Angular resolution micro-nano spectrum analysis device
CN106501267A (en) * 2016-10-18 2017-03-15 凌云光技术集团有限责任公司 Linear light source device and system for surface defects detection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571118A1 (en) * 1992-05-18 1993-11-24 Xerox Corporation Densitometer for measuring toner area coverage in a xerographic printer
US6891617B2 (en) 2002-09-18 2005-05-10 E.I. Du Pont De Nemours And Company Aspecular multi-angle protractor for evaluating a surface containing metallic particles
CN103884659A (en) * 2014-02-20 2014-06-25 南京邮电大学 Angular resolution micro-nano spectrum analysis device
CN103884659B (en) * 2014-02-20 2016-03-02 南京邮电大学 Angular resolution micro-nano spectral analysis device
CN106501267A (en) * 2016-10-18 2017-03-15 凌云光技术集团有限责任公司 Linear light source device and system for surface defects detection

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Legal Events

Date Code Title Description
8181 Inventor (new situation)

Free format text: FLEISCHER, JOHANNES, DR.-ING., 1000 BERLIN, DE

8141 Disposal/no request for examination
8110 Request for examination paragraph 44
8170 Reinstatement of the former position
8125 Change of the main classification

Ipc: G01J 3/42

8131 Rejection