DE10308883A1 - Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors - Google Patents
Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors Download PDFInfo
- Publication number
- DE10308883A1 DE10308883A1 DE2003108883 DE10308883A DE10308883A1 DE 10308883 A1 DE10308883 A1 DE 10308883A1 DE 2003108883 DE2003108883 DE 2003108883 DE 10308883 A DE10308883 A DE 10308883A DE 10308883 A1 DE10308883 A1 DE 10308883A1
- Authority
- DE
- Germany
- Prior art keywords
- harriott
- cell
- coupling
- photodiode
- light
- 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- Withdrawn
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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/004—Systems comprising a plurality of reflections between two or more surfaces, e.g. cells, resonators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
- G02B19/0023—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors) at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
- G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0085—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with both a detector and a source
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (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)
- Optical Measuring Cells (AREA)
Abstract
Description
Die Erfindung betrifft eine Harriott-Zelle, in die Lichtstrahlen ein- und auszukoppeln sind. Innerhalb der Zelle tritt in der Regel eine Mehrfachreflexion auf, so dass beispielsweise eine Absorptions-Messstrecke mehrfach von den Lichtstrahlen durchlaufen werden kann. Solche Zellen werden zur Verlängerung des optischen Weges genutzt, um weglängenabhängige Effekte auf kleinem Raum zu verwirklichen.The invention relates to a Harriott cell, into and out of the light rays. Inside the cell there is usually multiple reflection, so for example the absorption beams are traversed several times by the light beams can. Such cells are used to extend the optical path used for path length-dependent effects to realize in a small space.
Harriott-Zellen werden in der Absorptionsspektroskopie als Mehrwegzellen zur Verlängerung des Absorptionsweges eingesetzt. Eine Harriott-Zelle besteht im Wesentlichen aus zwei beabstandeten und gegeneinander ausgerichteten Hohlspiegeln, deren Kontur sehr unterschiedlich, beispielsweise sphärisch ausgebildet sein kann. Die Zelle wird zur Mehrfachreflexion der Lichtstrahlen verwendet. Hierzu ist eine Einkoppelung und eine Auskoppelung des Lichtes in und aus der Harriott-Zelle notwendig. Dies wird bisher durch eine Öffnung in einem der Spiegel bewerkstelligt. Somit muss zumindest eine Bohrung in einen der Spiegel eingebracht werden. Diese Öffnung erschwert die Herstellung der Harriott-Zelle. In der Regel muss die Öffnung durch ein optisches Fenster verschlossen werden. Zur Vermeidung von Interferenzen und anderen optischen Störeffekten muss dieses Fenster geeignete Eigenschaften aufweisen. Das Fenster muss beispielsweise keilförmig sein oder geeignete Antireflexionsbeschichtungen tragen. Um eine zweite Öffnung zu vermeiden, wird die Ein- und Auskoppelung in der Regel durch dasselbe Fenster vorgenommen. Die hierdurch bedingte geometrische Anordnung der gesendeten und empfangenen Strahlen erhöht die Baulänge des Systems, da sich beide Strahlengänge in der Nähe der Öffnung schneiden und Laser und Detektor nicht unendlich klein auslegbar sind.Harriott cells are used in absorption spectroscopy as reusable cells to extend the Absorption path used. A Harriott cell essentially exists from two spaced and mutually aligned concave mirrors, whose contour is very different, for example spherical can be. The cell becomes a multiple reflection of the light rays used. This involves coupling and uncoupling the light necessary in and out of the Harriott cell. So far this is done through an opening accomplished in one of the mirrors. So at least one hole in one of the mirrors can be inserted. This opening makes production difficult the Harriott cell. As a rule, the opening must be through an optical window be closed. To avoid interference and others optical interference effects this window has suitable properties. The window has to for example, be wedge-shaped or wear suitable anti-reflective coatings. To open a second one avoidance, the coupling in and out is usually done by the same Window made. The resulting geometrical arrangement the transmitted and received beams increases the overall length of the system, since both are beam paths nearby the opening cut and laser and detector cannot be designed infinitely small are.
Der Erfindung liegt die Aufgabe zugrunde, eine vereinfachte Harriott-Zelle bereitzustellen, die mit einem einfachen und kompakten Aufbau eine zufriedenstellende Ein- und Auskoppelung der Lichtstrahlen aufweist.The invention has for its object a to provide simplified Harriott cell with a simple and compact structure a satisfactory coupling and decoupling which has rays of light.
Die Lösung dieser Aufgabe geschieht durch die Merkmalskombination des Anspruchs 1. Vorteilhafte Ausgestaltungen können den Unteransprüchen entnommen werden.This task is solved by the combination of features of claim 1. Advantageous refinements can taken from the dependent claims become.
Die Erfindung ermöglicht den Verzicht auf Öffnungen oder Fenster in einem Spiegel der Harriott-Zelle. Damit werden besondere Vereinfachungen und ein kompakter Aufbau des Systems erzielt. Eine weiterhin notwendige Ein- und Auskoppeleinheit wird nicht wie bisher außerhalb und an einem Spiegel der Harriott-Zelle angebracht, sondern in die Harriott-Zelle verlagert. Somit geschieht die Ein- und Auskoppelung der Lichtstrahlen unmittelbar innerhalb des Volumens der Harriott-Zelle. Dies kann sowohl direkt geschehen, indem eine Lichtquelle und ein Empfänger, beispielsweise ein Photodetektor, insbesondere eine Photodiode im Volumen der Harriott-Zelle untergebracht werden. Neben der direkten oder unmittelbaren Einbringung der Lichtquelle und des Detektors besteht die Möglichkeit, Lichtquelle und Detektor außerhalb der Harriott-Zelle zu platzieren und die Lichtstrahlen über im Volumen der Harriott-Zelle befindliche Spiegel, Prismen oder optische Elemente, die über Lichtquellenleiter versorgt werden, ein- bzw. auszukoppeln. Die hauptsächliche Ein- bzw. Auskoppelrichtung geht somit nicht mehr durch einen Spiegel hindurch, sondern ist so ausgerichtet, dass die Einkoppeleinheiten zwischen den Spiegeln der Harriott-Zelle positioniert sind.The invention makes it possible to dispense with openings or window in a mirror of the Harriott cell. This makes it special Simplifications and a compact structure of the system achieved. One continues the necessary coupling and decoupling unit will not be outside as before and attached to a mirror of the Harriott cell, but in the Harriott cell relocated. The coupling and decoupling thus takes place the rays of light immediately within the volume of the Harriott cell. This can both done directly by a light source and a receiver, for example a photodetector, in particular a photodiode in the volume of the Harriott cell be accommodated. In addition to the direct or immediate contribution the light source and the detector there is the possibility of light source and Detector outside the Harriott cell to place and the rays of light across in the volume of the Harriott cell mirrors, prisms or optical elements located above light source conductors are supplied, couple in or out. The main one The coupling or decoupling direction no longer goes through a mirror through, but is oriented so that the coupling units positioned between the mirrors of the Harriott cell.
Wesentliche durch die Erfindung erzielbare Vorteile bestehen im Wegfall von komplizierten Bearbeitungen der Spiegel, die eine Ein-/Auskoppelöffnung nach dem Stand der Technik aufweisen müssen. Die insgesamt erzielbare, kompaktere Bauweise öffnet neue Konstruktionsmöglichkeiten, da eine Ein- /Auskoppeleinheit direkt in der Harriott-Zelle untergebracht ist.Essential advantages achievable by the invention exist in the absence of complicated machining of the mirrors, which has a coupling / decoupling opening according to the state of the art. The total achievable more compact design opens new design options, there is a coupling / decoupling unit is housed directly in the Harriott cell.
Im Folgenden werden anhand von schematischen, die Erfindung nicht einschränkenden Figuren Ausführungsbeispiele beschrieben:In the following, schematic, not limiting the invention Figures exemplary embodiments described:
Es wird ausgegangen von einem allgemein bekannten
Stand der Technik, der in
In einer vorteilhaften Ausgestaltung
kann entsprechend
Die für optoelektrische Bauelemente jeweils notwendige Kabelverbindungen sind in den Figuren insgesamt nicht dargestellt.The one for optoelectric components necessary cable connections are in total in the figures not shown.
Die
In
Eine weitere vorteilhafte Ausgestaltung
ist in
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003108883 DE10308883A1 (en) | 2003-02-28 | 2003-02-28 | Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003108883 DE10308883A1 (en) | 2003-02-28 | 2003-02-28 | Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10308883A1 true DE10308883A1 (en) | 2004-09-23 |
Family
ID=32891805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003108883 Withdrawn DE10308883A1 (en) | 2003-02-28 | 2003-02-28 | Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10308883A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015022494A1 (en) * | 2013-08-14 | 2015-02-19 | Duvas Technologies Limited | Multipass spectroscopic absorption cell |
DE202022101831U1 (en) | 2022-04-06 | 2022-05-30 | CS INSTRUMENTS GmbH & Co. KG | Optical measuring cell |
DE102022108236A1 (en) | 2022-04-06 | 2023-10-12 | CS INSTRUMENTS GmbH & Co. KG | Optical measuring cell |
-
2003
- 2003-02-28 DE DE2003108883 patent/DE10308883A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015022494A1 (en) * | 2013-08-14 | 2015-02-19 | Duvas Technologies Limited | Multipass spectroscopic absorption cell |
US9933355B2 (en) | 2013-08-14 | 2018-04-03 | Duvas Technologies Limited | Multipass spectroscopic absorption cell |
DE202022101831U1 (en) | 2022-04-06 | 2022-05-30 | CS INSTRUMENTS GmbH & Co. KG | Optical measuring cell |
DE102022108236A1 (en) | 2022-04-06 | 2023-10-12 | CS INSTRUMENTS GmbH & Co. KG | Optical measuring cell |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6178041B1 (en) | Device for coupling the radiation of short-pulse lasers in an optical beam path of a microscope | |
DE3012184C2 (en) | ||
DE2745940B2 (en) | Optical transmission body | |
EP0053324B2 (en) | Optical branching device | |
DE3230570A1 (en) | TRANSMITTER AND RECEIVER FOR A FIBER OPTICAL SENSOR SYSTEM | |
DE3519995C2 (en) | ||
DE19610138A1 (en) | Reading lamp system for passenger aircraft | |
DE102007030880A1 (en) | Object scene detecting device for use in guided missile, has separation lens comprising prism coupled with optical fibers that are optically connected with emitter unit and detector unit, respectively | |
DE102004017493B4 (en) | Optical communication system and open space optical communication device | |
EP0660106B1 (en) | Device with spectrophotometer and optical fibers | |
DE19648074B4 (en) | An optical device for reducing the feedback of scattered light rays to a signal transmission fiber, process for its manufacture, and its use in optical devices | |
DE10308883A1 (en) | Harriott cell for absorption spectroscopy has light entry and exit unit with laser diode and photodiode pair between facing concave mirrors | |
DE102005010557B4 (en) | Optical Multiplexer / Demultiplexer | |
DE102006040813B4 (en) | Laser scanner with transmitting and receiving device | |
DE19740316A1 (en) | Automobile lamp unit | |
DE10028375B4 (en) | laser device | |
DE10021379A1 (en) | Optical measuring arrangement, in particular for measuring the layer thickness | |
DE19840935B4 (en) | End piece for optical fibers | |
DE69914511T2 (en) | OPTICAL IMAGING SYSTEM | |
EP3614130A1 (en) | Device for determining optical properties of samples | |
EP0540715A1 (en) | Optical sensor | |
DE60200139T2 (en) | Device with reduced loss due to back reflection | |
DE19904461C2 (en) | Arrangement for the contactless transmission of data | |
DE3111743A1 (en) | Transmitting and receiving device for optical radiation | |
DE10002106A1 (en) | Combined light source and analysis system for spectrometer uses fiber optic coupler to combine light sources in the range from UV to IR |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |