WO2019029907A2

WO2019029907A2 - Spectometric measuring device and method for analysing a medium using a spectrometric measuring device

Info

Publication number: WO2019029907A2
Application number: PCT/EP2018/067743
Authority: WO
Inventors: Marion Hermersdorf; Ralf Noltemeyer; Martin HUSNIK; Florian Michel; Benedikt Stein; Christoph Schelling
Original assignee: Robert Bosch Gmbh
Priority date: 2017-08-09
Filing date: 2018-07-02
Publication date: 2019-02-14
Also published as: WO2019029907A3; DE102018204837A1; EP3665453A2

Abstract

The invention relates to a spectrometric measuring device (100) designed to record spectrometric data of solids and fluids, comprising a receiving device (102), designed to receive a medium (104') to be examined, a miniature spectrometer (101) being designed to record the spectrometric data of the medium (104'). The miniature spectrometer (101) comprises: an illumination unit (1010) designed to irradiate the medium (104') with electromagnetic radiation (1010'); and - a detector unit (1011) designed to detect a radiation portion (1011") of the electromagnetic radiation (1010'), said portion emanating from the medium (104'), - the miniature spectrometer (101) comprising the illumination unit (1010) and the detector unit (1011) being provided on a first side (1021) of the receiving device (102) and - a coupling structure (1030) being provided on the second side (1022) of the receiving device (102), lying opposite the first side (1021), said coupling structure being designed to couple at least the radiation portion (1011") of the electromagnetic radiation (1010') emanating from the illumination unit (1010) into an optical waveguide (1031). The optical waveguide (1031) is designed to direct the radiation portion (1011") from the second side (1022) to the detector unit (1011) on the first side (1021).

Description

description

title

A spectrometric measuring device and method for analyzing a medium using a spectrometric measuring device

State of the art

US 5909280 A describes a microspectrometer which comprises a monolithically integrated light source and a monolithically integrated detector. The microspectrometer is used as part of a sensor system that is suitable for testing both solids and liquids. The

Microspectrometer includes a Fabry-Perot interferometer as a spectral element and a chamber into which the medium to be examined can be introduced via a channel. The light source and the detector are disposed on opposite sides of the chamber.

Core and advantages of the invention

The invention relates to a spectrometric measuring device, a method for analyzing a medium using a spectrometric

Measuring device and a computer program product.

Spectral information of a medium can be from one of the medium

coming electromagnetic radiation, for example from one of the medium emitted, reflected, transmitted and / or scattered

electromagnetic radiation, obtained by these

electromagnetic radiation, for example from a spectrometer

recorded and evaluated. A spectral element, such as a grating spectrometer, Fabry-Perot interferometer, transmission filter / linear Variable filters or Fourier transform spectrometers may in this case be arranged between a light source and the medium to be examined and / or between the medium and a detector. To record spectrometric data of the medium to be examined, among other things, a transmission measurement or a reflection measurement can be carried out. In transmission measurements, electromagnetic radiation is transmitted from the medium to be examined, the transmitted

electromagnetic radiation has spectral information about the medium. The transmitted electromagnetic radiation can

Wavelength are selectively detected and give information about the spectral composition of the medium. In reflection measurements, electromagnetic radiation is reflected by the medium to be examined, the reflected electromagnetic radiation having spectral information about the medium. The reflected electromagnetic radiation can be detected wavelength-selective and provide information about the spectral composition of the medium.

Fluids, i. Liquids, gases and mixtures of liquids and gases reflect in part only a small portion of an electromagnetic radiation impinging on the fluid, a larger proportion of that on the fluid

incident electromagnetic radiation is transmitted by the fluid. Thus, only a small part of the electromagnetic radiation, which comprises spectral information about the medium, is reflected.

An advantage of the invention with the features of the independent claims is that spectral information of both solids and fluids with a high signal strength and thus with high accuracy and

Reliability can be detected. As a result, the reliability of a spectral analysis of the medium can be increased and the

Applications of the spectrometric measuring device can be extended. Furthermore, the spectrometric measuring device has an improved mechanical and metrological robustness.

This is achieved with a spectrometric measuring device which is used to acquire spectrometric data of both solids and fluids "receiving" here means that the medium can be arranged for example in the receiving device or can be introduced into the receiving device

Miniaturspektrometer, which is used to acquire the spectrometric data of the

Medium, comprises a lighting unit which is adapted to irradiate the medium with an electromagnetic radiation and a detection unit which is adapted to detect a coming from the direction of the medium radiation portion of the electromagnetic radiation. The spectrometric measuring device is characterized in that the miniature spectrometer on a first side of the

Receiving device is arranged and that on one of the first side opposite the second side of the receiving device a

Einkoppelstruktur is arranged. The coupling-in structure is set up to couple at least one radiation component of the electromagnetic radiation coming from the illumination unit into an optical waveguide, wherein the optical waveguide is set up to guide the radiation component from the second side to the detection unit, wherein the detection unit is arranged on the first side. One advantage is that even with undesired changes in the measuring geometry, the measuring geometry being an arrangement of the measuring geometry

Includes miniature spectrometer relative to the coupling structure, still reliable spectrometric data can be detected. The spectrometric

Measuring device is robust against changes in the measuring geometry. Another advantage is that the spectrometric measuring device a

provides reproducible measuring geometry. In particular, the distance between the miniature spectrometer and the coupling-in structure and an alignment of the miniature spectrometer and the coupling-in structure relative to one another are predetermined by the spectrometric measuring device. Thus, measurement errors, for example due to incorrect alignment of the

Miniaturspektrometers relative to the coupling structure, can be avoided or reduced and thereby the reliability of the acquired spectrometric data can be increased. This will also allow an untrained or untrained user to easily

perform meaningful spectrometric measurement. Another advantage is that unwanted measurement artifacts by skillful choice of measurement geometry can be suppressed. For example, measurement artifacts can arise when the spectrometer is held at an angle that is unfavorable to the measurement relative to the sample. For example, due to an unfavorable relative orientation between the miniature spectrometer and the sample, only a small proportion of the electromagnetic radiation to be detected can be detected in the

Miniature spectrometer occur so that a large portion of the signal is lost or it is mainly detected only direct reflection, which does not include information about the interior of the sample. A clever one

Measuring geometry is characterized here by the fact that much diffuse

electromagnetic radiation but preferably no direct reflection in the

Miniature spectrometer arrives.

In one embodiment, the receiving device comprises a holding structure with an opening. One advantage is that the support structure defines a region in which the medium can be arranged to acquire the spectrometric data of the medium. The holding structure may, for example, enclose a circular opening. For example, the holding structure may be annular. Alternatively or additionally, the opening can be rectangular, polygonal, etc., or have any desired shape.

Advantageously, for example, a vessel in which the medium is arranged, are introduced into the opening. The support structure can be the vessel and thus the medium in the beam path between the

Miniature spectrometer and the coupling structure hold. Another advantage is that a simple introduction of the medium in the spectrometric

Measuring device and a simple removal of the medium from the spectrometric measuring device can be made possible by the user.

According to another embodiment, the spectrometric

Measuring device The miniature spectrometer and the miniature spectrometer can be integrated into the support structure. One advantage is that the miniature spectrometer can be reliably maintained at a known spacing and orientation relative to the launching structure so that, for example, user application errors such as placement of the miniature spectrometer at a position unsuitable for detection of the spectrometric data can be reduced , According to a further embodiment, the receiving device may have a positioning device. For example, the holding structure may comprise the positioning device. The positioning device is set up to position the miniature spectrometer on the first side of the recording device and to connect the optical waveguide to the detection unit in such a way that the radiation fraction of the electromagnetic radiation guided in the optical waveguide is guided into the detection unit.

Advantageously, therefore, application errors by a user, such as the placement of the miniature spectrometer at one for the

Detection of the spectrometric data inappropriate position, reduced or avoided. For example, the miniature spectrometer can be designed as a mobile terminal, which can be placed on the first side of the spectrometric measuring device. The positioning device may, for example, a mark, a depression, a projection, etc. or a

Combination thereof, which allows the user to arrange the

Miniature spectrometer can facilitate. The positioning device can furthermore be set up to use miniature spectrometers at the

Mounting device to fix. An advantage is that thus during the measurement, changing the position of the miniature spectrometer relative to

Einkoppelstruktur can be avoided and thus the reliability of the measurement results can be increased.

In one embodiment, the medium comprises a fluid in a vessel or a solid in a vessel, wherein the opening is adapted to

Receive vessel in the beam path of the miniature spectrometer between the first side and the second side. Solid bodies may include, for example, powders, granules, etc., or mixtures thereof. Fluids can

For example, liquids, gases, etc. or mixtures thereof. Furthermore, the medium may comprise a mixture of solids and fluids. An advantage is that the vessel is easy to insert and

Removing the medium in or out of the recording device allows. Furthermore, it can thus be prevented that the spectrometric

Measuring device and the medium come into direct contact with each other and contamination of the spectrometric measuring device can be avoided. As a result, multiple measurements of different media can be performed one after the other with high reliability without mutual interference. A dimension of the opening may be adaptable in one embodiment. The

Dimension may include, for example, a diameter, a circumference, a length, a height, a width, etc. of the opening. For example, a surface of the holding structure facing the opening may be covered at least in sections with a flexible and / or elastic material. Care is taken to ensure that the optical beam path remains adjusted.

Alternatively or additionally, a lamellar structure may be arranged at least in sections on the inner surface of the holding structure facing the opening, wherein the dimension of the opening depends on an adjustment of the lamellar structure. For example, a lamellar structure may include at least a first movable fin element, wherein a first region of the movable fin element is fixedly connected to the support structure and a second region of the movable fin element has an adjustable angle to the support structure. By varying the adjustable angle, the opening can be made smaller or larger. An advantage is that thus the

Opening to the medium or to the vessel in which the medium is arranged, can be adjusted so that the medium or the vessel can be held securely and firmly in the beam path between the miniature spectrometer and the coupling structure.

The adjustment of the lamellar structure, for example by means of

Stepper motors take place, which are covered by the spectrometric measuring device. For example, the stepper motor can adjust the adjustable angle. One advantage is that the dimension of the opening can be adapted to the medium or to the vessel.

In one embodiment, the coupling-in structure and the optical waveguide can be integrated into the holding structure. That is, the coupling structure and / or the optical waveguides can be at least partially or completely embedded in the support structure or arranged on the support structure. An advantage is that the spectrometric measuring device thus has a compact construction and a mechanical and metrological robustness.

In one embodiment, a diffuser can be arranged or arranged in the beam path between the illumination unit and the receiving device. The diffuser can allow an approximately homogeneous illumination of the medium. For example, a directional diffuser can be used for this purpose. An advantage is that thus the reliability of the spectrometric data can be increased. Alternatively or additionally, a light source which radiates over a wide angular range and which differs from the light source

Lighting unit is used to be used for irradiation of the medium.

In one embodiment, a spectral element can be arranged or arrangeable in the beam path between the illumination unit and the recording device and / or can be encompassed by the detection unit. The spectral element enables a wavelength-selective measurement of the

Radiation component.

A method for analyzing the medium, wherein the medium both a

Solid as well as a liquid can be, using the

spectrometric measuring device, comprising the steps:

• Arrange the media in the recording device of the

spectrometric measuring device,

Irradiating the medium with the electromagnetic radiation,

• Detecting the coming from the direction of the medium

Radiation component and

• Spectral evaluation of the coming from the direction of the medium

Radiation component for analysis of the medium.

The method is characterized in that the radiation component coupled into the optical waveguide after passing through the medium and the

Detecting is performed in the detection unit. An advantage is that with this method both solids and fluids can be examined spectrometrically. Another advantage is that the analysis of the medium only in small Depending on the measurement geometry depends and thus the analysis of the medium can be done with a high reliability.

In an embodiment, in the step of arranging the medium in the receiving device, the dimension of the opening can be adjusted, wherein the

Setting as a function of a dimension of the medium or

Vessel is done. One advantage is that thus the medium for the measurement can be arranged securely and firmly in the opening. Brief description of the drawings

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. Same

Reference numerals in the figures designate the same or equivalent elements.

Show it

Fig. 1 is a plan view of a spectrometric measuring device in one

Cross section according to an embodiment,

2 is a side view of a spectrometric measuring device according to a

Embodiment, which on a vessel in which a medium

is placed, arranged,

3 shows a section of a plan view of a spectrometric measuring device according to an embodiment on which a mobile terminal is arranged; FIG. 4 shows a section of a plan view of a spectrometric measuring device according to an embodiment comprising a miniature spectrometer; to a spectrometric measuring device according to an embodiment, wherein in an opening a holding structure is arranged a lamellar structure,

6 is a plan view of a spectrometric measuring device in one

Cross section according to an embodiment, wherein a diffuser in

Beam path is arranged,

7 is a flowchart of a method for analyzing a medium according to an embodiment and 8 shows a flowchart of a method for analyzing a medium according to a further exemplary embodiment.

Embodiments of the invention

In Fig. 1 is a plan view of a spectrometric measuring device 100 is shown in a cross section. The spectrometric measuring device 100 is set up to acquire spectrometric data of solids and fluids. In FIG. 1, a receiving device 102 is adapted to receive a medium 104 'to be examined. The receiving device 102 in this exemplary embodiment comprises a holding structure 102 'with an opening 102 ". In the opening 102", the medium 104' or a vessel 104 "can be arranged, in which the medium 104 'is arranged For example, a depression in the support structure 102 'or through the support structure 102' through hole are understood. For example, the medium 104 'may comprise a powder, a granulate, a liquid, a gas or a mixed form of the aforementioned. The vessel 104 "may be, for example, a bottle, a test tube or another vessel 104" suitable for receiving the medium 104 '. However, it is not necessary for the medium 104 'to be located in a vessel 104 ", for example, the spectrometric measuring device 100 may be at least partially immersed or introduced into the medium 104' such that the medium 104 'may enter the opening 102". 1, the holding structure 102 'is of annular design in the region of the opening 102. The holding structure 102' may be formed, for example, of a material transparent to the electromagnetic radiation 1010 'coming from a lighting unit 1010. The opening 102' here has a circular shape Cross-section on. For example, the diameter of the opening may range from 1 centimeter (cm) to 15 cm, including the diameters of 1 cm and 15 cm, or less than 1 cm and / or greater than 15 cm. The opening 102 "is not limited to a circular cross-section, but may for example be rectangular, elliptical or otherwise shaped.

For example, the opening 102 "may be adapted to the vessel 104 used for the measurement. Possible dimensions of the opening 102 "are in the range of a few centimeters, for example, the opening 102" is designed to accommodate bottles, test tubes, cuvettes, etc. The support structure may be formed, for example, of a plastic. On a first side 1021 of the recording device 102, a miniature spectrometer 101 is arranged. The miniature spectrometer 101 is a spectrometer which

In the centimeter range, in particular in the range of less than 10 cm and more than 1 cm or less. For example, the microspectrometer is greater than 1 cm ³ and less than 1000 cm ³ . Alternatively or additionally, the

Microspectrometer also be less than 1 cm ³ and greater than 0.01 cm ³ . Alternatively or additionally, the microspectrometer may also be smaller than 100 cm ³ and larger than 0.01 cm ³ . The miniature spectrometer 101 is adapted to radiation properties as a function of the wavelength of the detected electromagnetic

The miniature spectrometer 101 comprises a lighting unit 1010, which is set up to irradiate the medium 104 'with the electromagnetic radiation 1010. Further, the miniature spectrometer 101 comprises a detection unit 101 1, which is adapted to Direction of the medium coming radiation fraction 101 1 "of

electromagnetic radiation 1010 'to detect. The lighting unit 1010 and the detection unit 101 1 may be arranged, for example, in a housing. The miniature spectrometer 101 is arranged in FIG. 1 on an outer surface 1023 of the support structure 102 'facing away from the opening 102 "

Miniature spectrometer 101 may in this case be integrated into holding structure 102 'and thus included in spectrometric measuring device 100. Alternatively or additionally, the miniature spectrometer 101 can be placed on the support structure 102 'or detachably mounted on the support structure 102'. The illumination unit 1010 may include a light source. The light source may be, for example, an incandescent lamp, a thermal emitter, a laser, one or more light emitting diodes (LED),

LEDs with phosphor coating, plasma radiation sources, etc. include. The illumination unit 1010 and / or the detection unit 101 1 may comprise a spectral element. The spectral element may be, for example, a Fabry-Perot interferometer, a grating spectrometer, a transmission filter, a static or moving Fourier transformation spectrometer, or another

include wavelength-selective filters. The detection unit 101 1 may be

Detector element or a detector array comprising a plurality of detector elements comprise. As a detector element, a radiation sensor, for example based on silicon (Si), germanium (Ge), germanium on silicon, indium gallium arsenide (InGaAs), lead selenite (PbSe) can be used. As radiation sensors are suitable for example, photodiodes or bolometers. Radiation sensors may output an electrical signal depending on a property of the electromagnetic radiation impinging on the radiation sensor, which is a measure of the radiation property. Radiation sensors can measure, for example, an intensity or an energy flux density of the radiation component 101 1 ".

On one of the first side 1021 opposite second side 1022 of

Receiving device 102, a coupling structure 1030 is arranged. The

Einkoppelstruktur 1030 is adapted to at least a portion (101 1 ") of the coming of the illumination unit 1010 electromagnetic radiation 1010 'in one

Coupling optical fiber 1031. The optical waveguide 1031 is adapted to the coupled radiation portion 101 1 "from the second side 1022 to

Detection unit 101 1 on the first page 1021 to conduct. In Fig. 1 is the

Optical waveguide 1031 disposed on the outer surface 1023 of the support structure 102 '. Alternatively or additionally, the optical waveguide 1031 can be at least partially or completely embedded in the support structure 102 'or arranged on an inner surface 1024 of the support structure 102' facing the opening 102 "

Optical waveguide 1031 is connected to detection unit 101 1 in such a way that the radiation fraction 101 1 "guided in optical waveguide 1031 can be guided into the detection unit and can be detected there.

Optical waveguide can be used as an optical waveguide 1031, the diameter of which may be, for example, from 50 inclusive to 1000 inclusive μηη or may be greater than 1000 μηη. Alternatively or in addition, a bundle of several optical waveguides can also be used as the optical waveguide 1031. The

For example, optical fiber 1031 may be made of glass, doped glass, plastics such as

Polymer be formed. For example, a waveguide can also be used as optical waveguide 1031. The coupling into the detection unit takes place

for example with a focusing element between optical fiber 1031 and detection unit (e.g., collimating lens or optics imprinted directly on the fiber).

The medium 104 'is arranged in the beam path of the miniature spectrometer 101 between the first side 1021 and the second side 1022. Under the beam path of the miniature spectrometer 101, the geometric course of the

electromagnetic radiation 1010 ', 101 1 "from the illumination unit 1010 to Einkoppelstruktur 1030 and from the coupling structure 1030 to the detection unit 101 1 understood. The length of a path of the electromagnetic radiation 1010 'through the medium 104' may be adjusted by selecting a diameter of the opening 102 "and / or by selecting a dimension of the vessel 104" and thus a thickness of the medium 104 'to be penetrated. In one embodiment, the material from which the support structure 102 'is formed and the material from which the vessel 104''is formed have a similar index of refraction, thereby advantageously allowing radiation losses at the interface between

Support structure 102 'and vessel 104 "can be reduced or avoided Furthermore, the electromagnetic radiation coming from the illumination unit 1010 can

1010 'can be adapted to the shape of the vessel 104 "to avoid radiation losses, for example, by skillfully selected materials and flexible optical components., For example, skilfully chosen materials can be understood to mean air-free transparent and elastic materials motorized adjustable or electrically adjustable components, such as micromirrors, by means of which a propagation direction of the electromagnetic radiation 1010 ', 101 1 "can be adjusted. Another example of flexible optical

Components are, for example, diffractive optical elements

2 shows a side view of the spectrometric measuring device 100 according to an exemplary embodiment, wherein the spectrometric measuring device 100 is arranged on the vessel 104 '' The vessel 104 '' is introduced into the opening 102 'of the holding structure 102' Vessel 104 "designed as a bottle in which the medium 104 'is arranged. Depending on the size of the

The optical waveguide 1031 is in this case arranged on the outer surface 1023 of the support structure 102 'The miniature spectrometer 101 may be fixedly arranged on the support structure 102' or be formed as an independent device, which can be arranged or fastened on the support structure 102 '

Miniaturspektrometer 101 in a mobile terminal 108, for example, a

Smartphone, a spectrometer or a handheld spectrometer, be integrated, which can be inserted accurately into the spectrometric measuring device 100 and / or which can be arranged at a predetermined position of the support structure 102 '. FIG. 3 shows an exemplary embodiment in which the mobile terminal 108 comprising the miniature spectrometer 101 can be arranged by means of a positioning device 107 at a predetermined position of the holding structure 102 '. The support structure 102 'has in Fig. 3 on a projection 107', on which the mobile

Terminal 108 can be arranged so that the miniature spectrometer 101 at the predetermined position, here the first side 1021 of the support structure 102 ', can be positioned. The predefined position is chosen such that the radiation component 101 1 "can be coupled into the optical waveguide 1031 by means of the coupling-in structure 1030.

In Fig. 4, the positioning device 107 is formed as a recess in the support structure 102 '. The miniature spectrometer 101 or the mobile terminal 108, which comprises the miniature spectrometer 101, can be arranged precisely in the recess 107 "and can thus be located at a predetermined position of the

Arrange holding structure 102 '. As a result, slippage of the miniature spectrometer 101 can be avoided. The miniature spectrometer 101 may also be fixed to the

Support structure 102 'are connected, wherein it is inserted, for example, during manufacture in the recess 107 "and connected to the support structure 102'.

The mobile terminal 108 may include a computing unit configured to process signals or data, a memory unit configured to store signals or data, a communication interface for reading and / or outputting data, and a display unit configured to receive information and / or to display measurement results. The arithmetic unit may include, for example, a processor or a microcontroller. The communication interface can be designed to read in or output data wirelessly and / or by line. For example, the mobile terminal 108 may be a smartphone in the storage unit of which a software application (app) may be stored, or where the app may be downloadable or available online. The app can be set up to perform a measurement by means of the spectrometric measuring device 100. The measurement results or results of a spectrometric evaluation of the measurement results can be output to the user via a display unit of the mobile terminal 108, for example. Possible display units are, for example, displays or Speaker by means of which optical, haptic or acoustic outputs can be made.

In Fig. 5, the miniature spectrometer 101 is exemplified as part of the support structure 102 '. Alternatively or additionally, the miniature spectrometer 101 may also be formed separately or as part of a mobile terminal as described above. The support structure 102 'encloses the opening 102 "here annular

Haltestruktur 102 'is interrupted in the region of the predetermined position, wherein the miniature spectrometer 101 is integrated in the region of the predetermined position in the support structure 102'. No material of the support structure 102 'is arranged between the miniature spectrometer 101 and the vessel 104 "In this case, the vessel 104" is surrounded by a lamellar structure 109, the lamellar structure 109 being located on a surface of the support structure 102 facing the opening 102 " , ie, the inner surface 1024. A dimension of the opening 102 "is adaptable in this embodiment. By attaching the lamellar structure 109 on the inner surface 1024, for example, a circumference, a diameter, a shape, etc. of the opening 102 "can be adapted to a dimension of the vessel 104". Thus, it is possible to simply arrange the spectrometric measuring device 100 on the vessel 104 "The lamellar structure 109 in FIG

Lamella elements 109 '. The lamellar elements 109 'can be designed, for example, as movable structural elements which are firmly connected to the support structure 102' in a first region and which can have a second region whose angle 109 'is adjustable relative to the support structure 102' 5 are shown by curved directional arrows on one of the lamellar elements 109 'in FIG

Lamella elements 109 'can be formed, for example, from an elastic material. Upon insertion of the vessel 104 "into the opening 102", the lamellar elements 109 'may be pressed towards the support structure 102' such that the diameter of the opening 102 "increases relative to the diameter of the opening 102" prior to insertion of the vessel 104 " The opening 102 "thus depends on an adjustment of the lamellar structure 109. In one

In the exemplary embodiment, the lamellar structure 109 can be adjusted by means of stepper motors. Alternatively or additionally, the setting of the lamellar structure can also be done manually. For example, the adjustable angle 109 "of the lamellar elements 109 'can be adjusted in each case relative to the support structure 102'. so that the dimension of the opening 102 "as closely as possible to the size of the vessel 104" can be adjusted. The stepping motors of the lamellar elements 109 'can be controlled by means of a control unit, wherein the control unit can be integrated in the miniature spectrometer 101 or, when using a mobile terminal 108 with mini spectrometer 101, in the mobile terminal 108

The control unit transmits electrical signals to the stepping motors, which can be used to adjust the angles 109. The operation of the control unit by a user can take place, for example, via a display screen, for example as a touchscreen.

In Fig. 6 is a plan view of the spectrometric measuring device 100 in one

Cross section according to an embodiment shown. A diffuser 1091 is arranged in the beam path of the miniature spectrometer 101. In this

Embodiment, the positioning device 107 is formed as a projection 107 ', on which the miniature spectrometer 101 is arranged, or to which the mobile terminal 108 can be arranged. The diffuser 1091 is here in the

Positioning integrated. Alternatively or additionally, the diffuser 1091 may be integrated in the support structure 102 'or in the miniature spectrometer 101. The electromagnetic radiation 1010 'coming from the illumination unit 1010 may be initially formed by one or more optical components, i. In this exemplary embodiment, it is possible with the aid of the diffuser 1091 to homogenize the angular distribution or the intensity distribution of the electromagnetic radiation 1010 'and thus to allow a uniform irradiation of the medium 104'. For this example, a directional diffuser 1091 can be used. Alternatively or additionally, it is possible to use a light source which radiates over a wide angular range and which can be encompassed by the illumination unit 1010. In the embodiment shown in FIG. 6, the medium 104 'without a vessel 104 "is arranged in the opening 102". The medium 104 'can also be arranged in a vessel 104 "as described above

Illuminating unit 1010 coming electromagnetic radiation 1010 ', which is formed by the diffuser 1091, enters the medium 104' through the support structure 102 'and is at least partially transmitted by the medium 104'. The transmitted electromagnetic radiation impinges on the coupling-in structure 1030, which is arranged on the second side 1022 of the holding structure 102 '. The

Coupling structure 1030 couples the radiation portion 101 1 "in the optical waveguide 1031 on. The radiation component 101 1 "is guided by the optical waveguide 1031 into the detection unit 101 1 and detected there, Between the optical waveguide 1031 and the detection unit 101 1 optical imaging elements, such as

For example, optical lenses / converging lenses or light guiding optics 1032, are arranged. As already described above, the lighting unit

1010 and / or the detection unit 101 1 comprise a spectral element to enable the detection of spectrometric data. For example, the spectral element may be arranged between the illumination unit 1010 and the recording device 102.

Alternatively or additionally, in a exemplary embodiment not shown here, a diffuser 1091 can be arranged or arranged in the beam path between the illumination unit 1010 and the receiving device 102. Alternatively or additionally, in an embodiment not shown here in the beam path between the receiving device 102 and the detection unit 101 1 an optical

Imaging element 1092 arranged or be arranged.

FIG. 7 shows a method 200 for analyzing a medium 104 'using the spectrometric measuring apparatus 100 as a flow chart, the method comprising the steps of arranging 201 the medium 104' in the receiving apparatus

102 of the spectrometric measuring apparatus 100, irradiating 202 of the medium 104 'with the electromagnetic radiation 1010', detecting 203 of the radiation component 101 1 "coming from the direction of the medium 104 'and spectral evaluation 204 of the radiation component 101 1" coming from the direction of the medium for analyzing the Medium 104 'includes. The radiation component 101 1 "couples into the optical waveguide 1031 after passing through the medium 104 'and is guided by the optical waveguide 1031 for detection 203 into the detection unit 101 1. The medium 104' can be arranged, for example, in a vessel 104" and into the opening 102 "of the holding structure 102. Detecting 203 of the radiation component 101 1" can be carried out in the detection unit 101 1 as described above. in the

Step of the spectral evaluation 204, a detection signal 203 'is evaluated, which comprises the spectrometric data, the detection signal 203' resulting from the detection 203 of the radiation component 101 1 "The spectrometric data can comprise, for example, a spectrum or sections of a spectrum the spectrometric data one Intensity curve, which is plotted over the wavelength, the time or the location, or a course of an electrical signal. The

Detection signal 203 'may include, for example, an electrical signal.

For example, spectral information can be determined from the detection signal 203 'by means of a computer algorithm and reference data stored in a memory, for example reference spectra or spectral excerpts. The spectral evaluation 204 can take place in the miniature spectrometer 101, in the mobile terminal 108 and / or in an evaluation unit, for example a cloud, arranged externally with respect to the miniature spectrometer 101. The result of the spectral evaluation 204 can be output to a user, for example in the form of an optical, haptic or acoustic output. The result of the spectral evaluation 204, i. a spectral information of the medium 104 'may be, for example, information about a chemical composition of the medium 104', a presence and / or a concentration of at least one chemical in the medium 104 'or an identification of the medium 104'.

In Fig. 8, in the step of arranging 201 the medium 104 'in the

Recording device 102, the dimension of the opening 102 "set 2010, wherein the setting 2010 in dependence of a dimension of the medium 104 'or a vessel 104", in which the medium 104' is arranged takes place.

The placing 201 of the medium 104 'in the receiving device 102 can be done for example by a user. For example, the

spectrometric measuring device 100 are at least partially immersed in the medium 104 'or the medium 104' can be introduced into the vessel 104 "and the vessel 104" can be introduced into the receiving device 102 together with the medium. For this purpose, for example, the spectrometric measuring device 100 can be arranged on the vessel 104 "The control of the spectrometric measuring device 100 can take place via a smartphone plugged into the recording device 102 as a control module or a separate control module, which can comprise a screen, for example Start a measurement via the control module and / or adjust the dimension of the opening 102 "as described above to the vessel 104" or the medium 104 '.

For example, an app can be installed on the smartphone, wherein the app performs an implementation of the method 200 for analyzing the medium 104 " Use of the spectrometric measuring device 100 can enable. Furthermore, the app may provide clues to the user to assist him in performing the method 200.

With the spectrometric measuring device 100 or the method 200 for analyzing the medium 104 ', for example, the following liquids can be examined. The liquids may be disposed in vessels 104 "which may be introduced into the spectrometric measuring device 100, the medium 104 'may be introduced into the spectrometric measuring device 100 or the spectrometric measuring device 100 may be immersed in the liquids." Vessels 104 "are preferably at least partially transparent in the range of the electromagnetic radiation 1010 'used. For example, a ratio of ethanol to methanol in a liquid, origin and / or purity of olive oils, quality and / or ingredients of wines or sparkling wines, sugar content and / or ingredients of fruit juices, or contamination of water can be determined.

Claims

claims

1 . A spectrometric measuring device (100) adapted for detecting spectrometric data of solids and fluids, comprising

A pickup device (102) adapted to receive a medium (104 ') to be examined, wherein a miniature spectrometer (101) is arranged to acquire the spectrometric data of the medium (104'), the

Miniature Spectrometer (101)

• comprises a lighting unit (1010) which is adapted to irradiate the medium (104 ') with an electromagnetic radiation (1010') and

A detection unit (101 1), which is set up to detect a radiation portion (101 1 ") of the electromagnetic radiation (1010 ') coming from the direction of the medium (104'),

characterized in that

The miniature spectrometer (101), comprising the illumination unit (1010) and the detection unit (101 1), is arranged on a first side (1021) of the recording device (102) and

On one of the first side (1021) opposite second side (1022) of the receiving device (102) a coupling structure (1030) is arranged, which is adapted to at least the radiation component (101 1 ") of the illumination unit (1010) coming electromagnetic Radiation (1010 ') into an optical waveguide (1031) coupled, wherein the optical waveguide (1031) is adapted to the radiation portion (101 1 ") from the second side (1022) to the detection unit (101 1) on the first side (1021) to lead.

2. Spectrometric measuring device (100) according to claim 1, characterized in that the receiving region (102) comprises a holding structure (102 ') having an opening (102 ").

3. spectrometric measuring device (100) according to claim 2, characterized in that the spectrometric measuring device (100) comprises the miniature spectrometer (101) and the miniature spectrometer (101) in the support structure (102 ') is integrated.

4. spectrometric measuring device (100) according to one of the preceding

Claims, characterized in that the receiving device (102) has a positioning device (107) which is adapted to the

Miniature spectrometer (101) on the first side (1021) of the receiving device (102) to position and to connect the optical waveguide (1031) with the detection unit (101 1) such that in the optical waveguide (1031) guided

electromagnetic radiation (101 1 ") in the detection unit (101 1) is guided.

5. spectrometric measuring device (100) according to one of the preceding

Claims, characterized in that the medium (104 ') comprises a fluid in a vessel (104 ") or a solid in a vessel (104") and in that the opening (102 ") is adapted to move the medium (104') in the beam path of the miniature spectrometer (101) between the first side (1021) and the second side (1022).

6. The spectrometric measuring device (100) according to any one of claims 2 to 5, characterized in that a dimension of the opening (102 ") is adaptable.

7. spectrometric measuring device (100) according to claim 6, characterized in that on one of the opening (102 ") facing surface (1024) of the support structure (102 ') at least partially a lamellar structure (109) is arranged, wherein the dimension of the opening (102 ") depends on an adjustment of the lamellar structure (109).

8. A spectrometric measuring device (100) according to claim 7, characterized in that the spectrometric measuring device (100) comprises a stepping motor which is adapted to adjust the lamellar structure (109).

9. Spectrometric measuring device (100) according to one of claims 2 to 8, characterized in that the holding structure (102 ') surrounds the opening (102 ") in an annular manner.

10. spectrometric measuring device (100) according to one of claims 2 to 9, characterized in that the coupling structure (1030) and the optical waveguide (1031) in the support structure (102 ') are integrated.

1 1. Spectrometric measuring device (100) according to one of the preceding

Claims, characterized in that in the beam path between the

Lighting unit (1010) and the receiving device (102) a diffuser (1091) is arranged or can be arranged.

12. Spectrometric measuring device (100) according to one of the preceding

Claims, characterized in that in the beam path between the

Lighting unit (1010) and the receiving device (102) is arranged a spectral element and / or that the detection unit (101 1) comprises a spectral element.

13. Method (200) for analyzing a medium using a

A spectrometric measuring device (100) according to any one of the preceding claims, wherein the method (200) comprises the steps

Arranging (201) the medium (104 ') in the receiving device (102) of the spectrometric measuring device (100),

Irradiating (202) the medium (104 ') with the electromagnetic radiation (1010'),

• Detecting (203) of the coming from the direction of the medium (104 ')

Radiation component (101 1 ") and

Spectral evaluation (204) of the direction of the medium (104 ')

for the analysis of the medium (104 '), characterized in that the radiation component (101 1 ") after a passage through the medium (104') couples into the optical waveguide (1031) and for detecting (203 ) is guided into the detection unit (101 1).

14. The method of claim 13 for analyzing a medium (104 ') using a spectrometric measuring device (100) according to one of claims 6 to 8, characterized in that in the step of arranging (201) the medium (104 ') in the receiving device (102) the dimension of the opening (102 ") is set (2010), the setting (2010) being dependent on a dimension of the medium ( 104 ') takes place.

15. Computer program product for carrying out the method (200) for

Analysis of a medium (104 ') according to one of claims 13 or 14.