DE19922782B4 - Apparatus and method for optical spectroscopy - Google Patents
Apparatus and method for optical spectroscopy Download PDFInfo
- Publication number
- DE19922782B4 DE19922782B4 DE1999122782 DE19922782A DE19922782B4 DE 19922782 B4 DE19922782 B4 DE 19922782B4 DE 1999122782 DE1999122782 DE 1999122782 DE 19922782 A DE19922782 A DE 19922782A DE 19922782 B4 DE19922782 B4 DE 19922782B4
- Authority
- DE
- Germany
- Prior art keywords
- resonator
- optical
- wavelength
- optical spectroscopy
- dependent
- 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.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title 1
- 238000004611 spectroscopical analysis Methods 0.000 title 1
- 230000001419 dependent effect Effects 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims 1
- 230000003595 spectral effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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
- G01J3/28—Investigating the spectrum
- G01J3/45—Interferometric spectrometry
- G01J3/453—Interferometric spectrometry by correlation of the amplitudes
Abstract
Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 17 des Patents
Description
Die
Erfindung betrifft einen Zusatz zu dem deutschen Patent
Erfindungsgemäß werden die im obengenannten Patent dargestellten interferometrischen Vorrichtungen derart ausgeführt oder weitergebildet, daß ein optischer Resonator entsteht. Dies hat zur Folge, daß die Vorrichtungen mehrfach genutzt wird und die resultierenden Interferenzen durch Überlagerung mehrerer, gegebenenfalls sehr vieler, Teilstrahlen gebildet werden. Eine derartige Überlagerung vieler Teilstrahlen zeigt, verglichen mit der entsprechenden Zweistrahl-Interferenz, gegebenenfalls sehr viel schärfere Minima bzw. Maxima der Intensität.According to the invention the interferometric devices shown in the aforementioned patent executed in such a way or further that one optical resonator arises. This has the consequence that the devices is used repeatedly and the resulting interference by overlay several, possibly very many, partial beams are formed. Such a superposition of many Partial beams shows, compared with the corresponding two-beam interference, possibly much sharper Minima or maxima of the intensity.
Bei geeigneter Bearbeitung der jeweiligen Meßwerte und/oder geeigneter Modulation der Phasenlage oder der Differenz der optischen Weglängen kann so eine entsprechend höhere Genauigkeit bzw. spektrale Auflösung erreicht werden.at suitable processing of the respective measured values and / or suitable Modulation of the phase angle or the difference of the optical path lengths can such a corresponding higher Accuracy or spectral resolution be achieved.
Die
technische Ausführung
des Resonators ist dabei von untergeordneter Bedeutung. Neben einfachen
Resonatoren mit nur zwei Bauelementen (
Besonders vorteilhaft sind Ausführungen bei denen mindestens ein Element des Resonators als wellenlängenabhängiges Element ausgeführt ist oder bei denen sich ein wellenlängenabhängiges Element im Inneren des Resonators befindet (oder beides).Especially advantageous embodiments in which at least one element of the resonator as a wavelength-dependent element accomplished or in which a wavelength-dependent element inside the Resonator is located (or both).
Die
Funktionsweise wird dargestellt anhand von
Der
Strahlteiler wird gebildet durch einen halbdurchlässigen Spiegel
S, der einen Teil des Lichtes reflektiert. Das wellenlängenabhängige Element
ist im Beispiel als Gitter G ausgeführt und derart dimensioniert und
angeordnet, daß Licht
einer bestimmten Wellenlänge λ zum Spiegel
S zurück
reflektiert wird [Gitterkonstante = λ/(2sin(φ))]. Der dort transmittierte
Teil interferiert mit dem vom Spiegel ursprünglich reflektierten Licht.The mode of operation is illustrated by
The beam splitter is formed by a semitransparent mirror S, which reflects part of the light. The wavelength-dependent element is designed in the example as a grid G and dimensioned and arranged such that light of a certain wavelength λ is reflected back to the mirror S [lattice constant = λ / (2sin (φ))]. The part transmitted there interferes with the light originally reflected by the mirror.
Abhängig von der Effizienz des Gitters und den Reflektions- bzw. Transmissionskoeffizienten des Spiegels treten mehrfachreflektierte Strahlen unterschiedlicher Intensität auf, welche die resultierenden Interferenzmuster in der oben dargestellten Weise beeinflussen.Depending on the efficiency of the grating and the reflection or transmission coefficients of the Mirror occur multiply reflected rays of different intensity on which the resulting interference patterns in the above Influence way.
Besonders
vorteilhaft kann es sein, Teile der Vorrichtung mit Hilfe von faseroptischen
Lichtleitern F zu realisieren (
In
einer weiteren Ausführung
(
Bei geeigneter Auswertung der Meßwerte abhängig von d können, insbesondere bei hoher Effizienz des Gitters G und hohem Reflektionskoeffizienten von S sehr hohe spektrale Auflösungen erzielt werden.at suitable evaluation of the measured values depends on d can, especially with high efficiency of the grating G and high reflection coefficient from S very high spectral resolutions be achieved.
Claims (6)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999122782 DE19922782B4 (en) | 1998-01-16 | 1999-05-18 | Apparatus and method for optical spectroscopy |
DE1999133291 DE19933291A1 (en) | 1998-01-16 | 1999-07-15 | Apparatus for detecting optical signals or generating optical signals by modulation of optical carriers |
JP2000618687A JP2002544553A (en) | 1999-05-18 | 2000-04-07 | Optical signal detection or generation device |
EP00925185A EP1181500A1 (en) | 1999-05-18 | 2000-04-07 | Device for detecting or generating optical signals |
PCT/EP2000/003144 WO2000070302A1 (en) | 1999-05-18 | 2000-04-07 | Device for detecting or generating optical signals |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19801469A DE19801469C2 (en) | 1998-01-16 | 1998-01-16 | Device for acquiring or generating optical signals |
DE1999122782 DE19922782B4 (en) | 1998-01-16 | 1999-05-18 | Apparatus and method for optical spectroscopy |
DE1999133291 DE19933291A1 (en) | 1998-01-16 | 1999-07-15 | Apparatus for detecting optical signals or generating optical signals by modulation of optical carriers |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19922782A1 DE19922782A1 (en) | 2000-11-23 |
DE19922782B4 true DE19922782B4 (en) | 2010-08-26 |
Family
ID=27218080
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1999122782 Expired - Lifetime DE19922782B4 (en) | 1998-01-16 | 1999-05-18 | Apparatus and method for optical spectroscopy |
DE1999133291 Ceased DE19933291A1 (en) | 1998-01-16 | 1999-07-15 | Apparatus for detecting optical signals or generating optical signals by modulation of optical carriers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1999133291 Ceased DE19933291A1 (en) | 1998-01-16 | 1999-07-15 | Apparatus for detecting optical signals or generating optical signals by modulation of optical carriers |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE19922782B4 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4533247A (en) * | 1981-09-03 | 1985-08-06 | International Standard Electric Corporation | Optical transmission system |
US5412474A (en) * | 1992-05-08 | 1995-05-02 | Smithsonian Institution | System for measuring distance between two points using a variable frequency coherent source |
DE19801469C2 (en) * | 1998-01-16 | 2001-05-17 | Campus Technologies Ag Zug | Device for acquiring or generating optical signals |
-
1999
- 1999-05-18 DE DE1999122782 patent/DE19922782B4/en not_active Expired - Lifetime
- 1999-07-15 DE DE1999133291 patent/DE19933291A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4533247A (en) * | 1981-09-03 | 1985-08-06 | International Standard Electric Corporation | Optical transmission system |
US5412474A (en) * | 1992-05-08 | 1995-05-02 | Smithsonian Institution | System for measuring distance between two points using a variable frequency coherent source |
DE19801469C2 (en) * | 1998-01-16 | 2001-05-17 | Campus Technologies Ag Zug | Device for acquiring or generating optical signals |
Also Published As
Publication number | Publication date |
---|---|
DE19922782A1 (en) | 2000-11-23 |
DE19933291A1 (en) | 2001-02-01 |
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Owner name: OPTEGON AG, CH Free format text: FORMER OWNER: CAMPUS TECHNOLOGIES AG, ZUG, CH |
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Representative=s name: LORENZ SEIDLER GOSSEL RECHTSANWAELTE PATENTANW, DE |
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