DD297240A5 - METHOD FOR MEASURING THE PUNCTUAL INCREASE OF REMISSIONS, REFLECTIONS AND TRANSMISSION SPECTROS BY MEANS OF ONLY ONE LED - Google Patents
METHOD FOR MEASURING THE PUNCTUAL INCREASE OF REMISSIONS, REFLECTIONS AND TRANSMISSION SPECTROS BY MEANS OF ONLY ONE LED Download PDFInfo
- Publication number
- DD297240A5 DD297240A5 DD34343390A DD34343390A DD297240A5 DD 297240 A5 DD297240 A5 DD 297240A5 DD 34343390 A DD34343390 A DD 34343390A DD 34343390 A DD34343390 A DD 34343390A DD 297240 A5 DD297240 A5 DD 297240A5
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- led
- reflection
- transmission
- pulse width
- reflectance
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000005540 biological transmission Effects 0.000 title description 2
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 230000005693 optoelectronics Effects 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 abstract description 10
- 238000000411 transmission spectrum Methods 0.000 abstract description 6
- 230000003595 spectral effect Effects 0.000 abstract 3
- 238000004737 colorimetric analysis Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 241001233242 Lontra Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
-
- 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
-
- 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
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
-
- 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
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4242—Modulated light, e.g. for synchronizing source and detector circuit
-
- 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
- G01N2201/062—LED's
- G01N2201/0621—Supply
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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur mesztechnischen Erfassung des punktualen Anstieges von Remissions-, Reflexions- und Transmissionsspektren. Das Verfahren kann sowohl in der Farbmesztechnik zur Ermittlung der gesuchten Spektren als auch in anderen Prozessen, bei denen die Kontrolle und/oder UEberwachung der spektralen Konstanz/Veraenderung von Materialien bedeutsam ist, eingesetzt werden. Erfindungsgemaesz wird der punktuale Anstieg von Remissions-, Reflexions- und Transmissionsspektren erfaszt, indem die von einer LED (10) ausgestrahlte Wellenlaenge durch Pulsbreitenmodulation des die LED (10) durchflieszenden Stromes If(t) veraendert wird, wobei die remittierten, reflektierten bzw. transmittierten Lichtimpulse der LED (10) von dem Empfaenger (11) in eine elektrische Groesze umgeformt und nur am Ende jedes Sendeimpulses der LED (10) fuer die weitere Bearbeitung uebernommen (MWUES) und bis zur naechsten Abfrage gespeichert (MWUEH) werden. Fig. 1{Remissionsspektrum; Reflexionsspektrum; Transmissionsspektrum; punktualer Anstieg; Pulsbreitenmodulation; Farbmesztechnik; spektrale Veraenderungen; spektrale Konstanz; LED}The invention relates to a method for mesztechnische detection of the punctual increase of reflectance, reflection and transmission spectra. The method can be used both in colorimetry for determining the spectra sought and in other processes in which the control and / or monitoring of the spectral constancy / change of materials is significant. According to the invention, the point increase in reflectance, reflection and transmission spectra is detected by varying the wavelength emitted by an LED (10) by pulse width modulation of the current If (t) flowing through the LED (10), the remitted, reflected or transmitted Light pulses of the LED (10) of the receiver (11) converted into an electrical Groesze and only at the end of each pulse of the LED (10) for further processing (MWUES) and stored until the next query (MWUEH). Fig. 1 {remission spectrum; Reflection spectrum; Transmission spectrum; point increase; Pulse width modulation; Farbmesztechnik; spectral changes; spectral constancy; LED}
Description
Hierzu 2 Seiten ZeichnungenFor this 2 pages drawings
Die Erfindung bezieht eich auf alle Anwendungsfalle, In denen mit Hilfe von LED Remissions·, Reflexions· und Trensmlsslonsspektren meßtechnisch erfaßt werden.The invention relates to all application cases in which measuring technology is detected by means of LED reflectance, reflection and separation spectra.
und Berechnung eines Remissionsgrades eine LED benötigt wird und zur originalgetreuen Darstellung des gesamten Spektrumseine sehr große Anzahl von LED's nötig ist.and calculating a degree of remission, an LED is needed and for the faithful representation of the entire spectrum, a very large number of LEDs is needed.
und Strahlungsempfängern geeignet.and radiation receivers.
charakterisieren.characterize.
mittels optoelektronischer Bauelemente.by means of opto-electronic components.
benötigten LED (10) mit einem pulsbreitenmodullerten Strom I = f (t) im Ampere-Bereich dergestalt durchflossen wird, daß diebekannte und bisher unerwünschte Kristallerwärmung, welche die Ursache für einen bevorzugten Ablauf vonrequired LED (10) is traversed with a pulse width modulated current I = f (t) in the ampere range in such a way that the known and previously undesirable crystal warming, which is the cause of a preferred expiration of
um mittels einer LED (10) die zu messende Probe mit η verschiedenen Wellenlängen zu bestrahlen und dadurch η Meßwerte desoptoelektronischen Ümpfängers (11) zur weiteren rechentechnischen Auswertung zur Verfügung zu stellen.to irradiate by means of an LED (10) the sample to be measured with η different wavelengths and thereby provide η measured values of the optoelectronic receiver (11) for further computational evaluation.
hervorgerufene Kristallerwärmung nicht zu irrevorsiblen Strukturveränderungen in der Kristallstruktur der LED (10) führt.caused crystal warming does not lead to irre-sensitive structural changes in the crystal structure of the LED (10).
Flg. 2: Schaltungstechnische Realisierung der Ansteuerung der LEO (10) und eynchrone Vorverarbeitung der durch den optoelektronischen Empfänger (11) empfangenen Meßwerte:Flg. 2: Circuit realization of the control of the LEO (10) and synchronous preprocessing of the measured values received by the optoelectronic receiver (11):
Der Taktgenerator (1) erzeugt eine Impulsfolge, welche durch den Impulsformer (2) In Ihrer Impulsbreite moduliert und Otter den LED-Treiber (3) de: LED (10) zugeführt wird.The clock generator (1) generates a pulse train, which is modulated by the pulse shaper (2) In their pulse width and Otter the LED driver (3) de: LED (10) is supplied.
Das Verzögerungsglied (4) gewährleistet eine Impulsbreitenabhängige Verkürzung des LED-Impulse, so daß das Ausgangesignal des optoelektronischen Empfängers (11), welches durch den Verstärker (6) vorverarbeitet wird, nur zum Ende jedes Sendeimpulses der LED (10) durch die Sample & Hold-Schaltung (7) übernommen (MWÜ ·> S) und für die ADU (8) bis zur Übernahme des nächsten Meßwertes zur Verfügung gestellt (MWÜ = H) wird. Über eine Schnittstelle zum Computer (9) werden die In der ADU gewandelten Werte zur weiteren rechentechnischen Auswertung an den Computer übergeben. Dieser steuert über die Schnittstelle zum Computer (9) den Logik-Dekoder (6), den Impulsformer (2) und das Verzögerungsglied (4), d. h. es Ist eine softwaremäßige Einstellung des Tastverhältnieses und der Impulsbreite des die LED (10) ansteuernden Signals möglich.The delay element (4) ensures a pulse width-dependent shortening of the LED pulses, so that the output signal of the optoelectronic receiver (11), which is preprocessed by the amplifier (6), only at the end of each transmission pulse of the LED (10) by the sample & hold Circuit (7) (MWÜ ·> S) and provided for the ADU (8) until the next measured value is taken over (MWÜ = H). Via an interface to the computer (9), the values converted in the ADU are transferred to the computer for further computational evaluation. This controls via the interface to the computer (9) the logic decoder (6), the pulse shaper (2) and the delay element (4), d. H. It is a software setting of Tastverhältnieses and the pulse width of the LED (10) driving signal possible.
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD34343390A DD297240A5 (en) | 1990-08-14 | 1990-08-14 | METHOD FOR MEASURING THE PUNCTUAL INCREASE OF REMISSIONS, REFLECTIONS AND TRANSMISSION SPECTROS BY MEANS OF ONLY ONE LED |
DE19914126678 DE4126678A1 (en) | 1990-08-14 | 1991-08-13 | Measuring technique for detecting pointwise increase of spectra - using pulse width modulation of wavelength radiated from single LED for remission, reflection and transmission spectra increase registration |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD34343390A DD297240A5 (en) | 1990-08-14 | 1990-08-14 | METHOD FOR MEASURING THE PUNCTUAL INCREASE OF REMISSIONS, REFLECTIONS AND TRANSMISSION SPECTROS BY MEANS OF ONLY ONE LED |
Publications (1)
Publication Number | Publication Date |
---|---|
DD297240A5 true DD297240A5 (en) | 1992-01-02 |
Family
ID=5620237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DD34343390A DD297240A5 (en) | 1990-08-14 | 1990-08-14 | METHOD FOR MEASURING THE PUNCTUAL INCREASE OF REMISSIONS, REFLECTIONS AND TRANSMISSION SPECTROS BY MEANS OF ONLY ONE LED |
Country Status (2)
Country | Link |
---|---|
DD (1) | DD297240A5 (en) |
DE (1) | DE4126678A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4338531A1 (en) * | 1993-11-11 | 1995-05-18 | Leica Lasertechnik | Device for multi-color illumination of preparations |
-
1990
- 1990-08-14 DD DD34343390A patent/DD297240A5/en not_active IP Right Cessation
-
1991
- 1991-08-13 DE DE19914126678 patent/DE4126678A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE4126678A1 (en) | 1992-03-12 |
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