DE102018213855A1 - Spectrometer device for spectrally analyzing light from an analysis object and method for operating a spectrometer device for spectrally analyzing light from an analysis object - Google Patents

Abstract

The present invention provides a spectrometer device (10) for spectrally analyzing light (L) from an analysis object (AO), comprising: a first optical imaging device (1a) with which an image (B) of the analysis object (AO) in an image plane (3 ) can be mapped; a spectrometer device (S) with a diffuser element (4), a spectral element (7), and a detector device (5), light rays of light (L) being scatterable on the diffuser element (4) and from the scattered light beams with the spectrometer device (S ) a wavelength spectrum of the light (L) can be generated; an image selection device (2) which is arranged in the image plane (3) and on which the image (B) can be imaged, the image (B) which can be imaged on the image selection device (2) by the image selection device (2) into several partial areas (T1 , T2, ..., Tn) can be subdivided, a partial image (B1, B2, ..., Bn) of the analysis object (AO) being able to be represented with at least one of the partial areas (T1, T2, ..., Tn) and in operation of the partial area (T1, T2, ..., Tn) the light (L) from the partial image (B1, B2, ..., Bn) can be directed onto the diffuser element (4); and a control device (SE) by means of which the operation of the partial areas (T1, T2, ..., Tn) can be switched on and / or off simultaneously and / or at different times and each partial area (T1, T2, ..., Tn ) position information in image (B) can be assigned.

Description

The present invention relates to a spectrometer device for spectrally analyzing light from an analysis object and a method for operating a spectrometer device for spectrally analyzing light from an analysis object.

State of the art

In optical spectroscopy, conventional monochromators and spectrometers offer possibilities for the investigation and characterization of a wide variety of samples. More recently, there has been a trend towards miniaturization of these devices typically found in the laboratory, right up to options for integrating such devices into mobile telephones or other consumer electronics devices. In order to extract spectral information from incident light, there are basically two opposite approaches that differ mainly in the number of detectors to be used. The first approach corresponds to the spatial multiplexing of the information followed by the acquisition with a multi-channel detector. An example of this is the classic laboratory spectrometer, in which the incident light can be dispersed via a grating, which corresponds to spatial multiplexing and can then be detected by a multi-channel detector, for example a Si imager (CCD or CMOS). In such a case, the incoming information I (λ) on a function I (x) displayed.

A further possibility for extracting spectral information from incident light is temporal multiplexing, which advantageously corresponds to the use of a monochromator and a sequential detection, for example with a single-channel detector. An example of a miniaturized spectroscopy system based on this principle can be built with a tunable Fabry-Perot interferometer (FPI) followed by a photodiode. The FPI represents a tunable optical filter that transmits only a narrow spectral range from the incident spectrum. The transmission wavelength can be changed over time, for example via a control voltage, so that different wavelengths are transmitted at different times. The multiplexing therefore takes place in time, that is, the incoming information I (λ) becomes a function I (t) mapped and can by a known context λ (t) can be calculated back to the spectrum. Systems and components that are based on this principle have been described in the scriptures, for example JP2015165266A (Seiko Epson), US9329360 (Sintef), EP2480867A1 (VTT). These technologies typically use single-channel detectors and are therefore also in spectral ranges other than the range that can be detected by silicon technology
inexpensively applicable. InGaAs photodiodes are ideal for detecting light in the near infrared spectral range. The fact that only a single-channel detector is used means that the increase in costs in comparison to silicon photodiodes is justifiable.

In the in WO2015015493A2 describes a spectrometer based on an array of interference filters of different central wavelength, which is based on a directional randomization of incident radiation at an opt. Diffuser based, as well as on the angle-dependent transmission through the filter array. The transmitted spectrally sorted light is imaged on an imager chip via a lens array.

Disclosure of the invention

The present invention provides a spectrometer device for spectrally analyzing light from an analysis object according to claim 1 and a method for operating a spectrometer device for spectrally analyzing light from an analysis object according to claim 9.

Preferred developments are the subject of the dependent claims.

Advantages of the invention

The idea on which the present invention is based is to provide a spectrometer device for spectrally analyzing light from an analysis object and a method for operating a spectrometer device for spectrally analyzing light from an analysis object, hyperspectral images with a non-imaging static spectrometer and an evaluation with reduced Computational effort and can also be advantageously reconstructed in a miniaturization and thus realizable.

According to the invention, the spectrometer device for spectrally analyzing light from an analysis object comprises a first optical imaging device with which an image of the analysis object can be imaged in an image plane; a spectrometer device with a diffuser element, a spectral element, and a detector device, light beams of the light being scatterable on the diffuser element and a wavelength spectrum of the light being able to be generated from the scattered light beams with the spectrometer device; an image selection device which is arranged in the image plane and on which the image can be imaged, the image which can be imaged on the image selection device being divided into a plurality by the image selection device Sub-areas can be subdivided, with a sub-image of the analysis object being able to be represented with at least one of the sub-areas and the light from the sub-image being able to be directed onto the diffuser element during operation of the sub-area; and a control device by means of which the operation of the partial areas can be switched on and / or off simultaneously and / or at different times and position information in the image can be assigned to each partial area.

A possible simultaneous activation of partial areas of the image selection device advantageously corresponds to an addition of the spectral information of these partial areas within the spectrometer device. A possible activation of the partial area at different times advantageously corresponds to a sequential recording of separate spectra for each partial area. In the context of the present invention, light can generally be understood to mean electromagnetic radiation which can be in the visible wavelength range but also outside the visible wavelength range. The light thus advantageously designates electromagnetic radiation which can be emitted by the analysis object and also that electromagnetic radiation which can be emitted by the light source on the analysis object.
One aspect to be considered in this connection is advantageously the spatial resolution of such measurement methods, which, for example, can no longer be present in the case of an FPI with a subsequent single-channel detector or a static spectrometer with a diffuser. However, this defect can be remedied by using an imager chip in conjunction with an FPI and imaging optics.
The analysis object can be a body or a liquid. The first optical imaging device can comprise a lens, for example.

The diffuser element advantageously serves as an element for randomizing the light from the partial images, location information for light of the partial image incident on the detector element being able to be destroyed by the diffuser element.

The described spectrometer device can advantageously be used to record a hyperspectral image with non-imaging means of the spectrometer device, and by using the (static) components of the spectrometer device, the spectrometer device can advantageously be used as a robust hyperspectral camera.
A partial area in operation advantageously maps the partial image of this partial area onto the spectrometer device or a second imaging device. If the sub-area is switched off, it is possible that advantageously no light is emitted by it in the direction of the spectrometer device (transmitted or reflected) and advantageously not detected by the spectrometer device. Several sections can be switched on or off at the same time or the relevant sections can be switched on or off one after the other or in groups. The position information advantageously corresponds to the information at which point in the image the partial image that can be represented by the partial area is located. The position information can advantageously be determined and / or stored / be and be reconstructed by a control device or signal processing device. It is also possible for the image selection device with the partial areas to comprise an arrangement of small mirrors which can be adjusted in their angle of attack. In the case of the activated partial area, the light can then be reflected in the direction of the spectrometer device; in the case of a deactivated partial area, the light can be reflected in another direction and does not reach the spectrometer device. The direction in which the light is emitted can also play a role here. The sub-area can therefore be switched on when it is oriented such that the light is directed to the spectrometer device, and can be switched off when it directs the light away from the spectrometer device.

With regard to the image selection device, the subareas advantageously comprise a delimited area within an image area of the image that can be represented in the image plane. The surf of the delimited area can advantageously result from a continuous transition of the transmission or reflection at the partial area into the adjacent partial area, which can advantageously represent a smooth transition. Furthermore, a partial area can also designate a discrete area separated by a binary transition.

The information contained in the spectra can be evaluated and allows conclusions to be drawn, e.g. on the nutrient content in Essen, material identification and much more.As a rule, this is done algorithmically using chemometric data analysis methods, e.g. a main component analysis, a linear discriminant analysis, followed by a regression or a classification. These methods extract small, relevant portions from the full spectral information and make their statements based on these small parts of the spectrum. Accordingly, the majority of the spectral information recorded by the pixels can advantageously be dispensed with and measurement time can be saved, since advantageously only the parts of the information required for the algorithms from the relevant relevant pixels can be recorded with a longer integration time instead of including all the pixels all irrelevant areas. The term spectrum advantageously corresponds to a light intensity over the wavelength.

According to a preferred embodiment of the spectrometer device, the detector device comprises a plurality of spatially arranged pixels.

The detector device can consequently comprise a plurality of spatially arranged pixels, wherein a spectrum of the light incident on the spectrometer device can advantageously be reconstructed by means of the measured intensities at the pixels.
According to a preferred embodiment of the spectrometer device, it comprises a signal processing device, by means of which the wavelength spectrum can be evaluated.

The signal processing device can advantageously receive and process a signal from the detector element based on the wavelength spectrum, for example filtering or forming an integral. Furthermore, the signal processing device itself can also function as a control unit for the components of the spectrometer device.

According to a preferred embodiment of the spectrometer device, a reflection or a transmission can be generated on the image selection device for each partial area, by means of which the partial image can be transferred from the partial area to the spectrometer device.

During operation of the partial area, this light can radiate onto the spectrometer device by transmission or reflection, advantageously straight or at an angle to the original direction of incidence of the light from the analysis object.

According to a preferred embodiment of the spectrometer device, it comprises a second optical imaging device which is arranged between the image selection device and the diffuser element and with which at least one partial image can be imaged on the diffuser element.

The second optical imaging device can advantageously be shaped like the first optical imaging device or differ from it. The second optical imaging device can advantageously comprise a lens. In other words, the second optical imaging device can image the image selection device on the diffuser element or at least concentrate or focus the light from the partial areas onto an aperture of the detector device, advantageously not imaging.

According to a preferred embodiment of the spectrometer device, the spectral element comprises a grating or an interference filter. For example, the interference filter comprises a linearly variable filter.

According to a preferred embodiment of the spectrometer device, the spectral element comprises a birefringent element.

The birefringent element advantageously generates an angle-dependent phase difference between coherent partial beams, for example from one or more partial areas, and comprises, for example, a Savart polariscope or a Wollaston prism, which can also be followed by further optics towards the detector device.

According to a preferred embodiment of the spectrometer device, it comprises an imaging imaging system, by means of which an additional image of the analysis object can be generated.

The imaging imaging system can itself advantageously also comprise a detector, for example a camera, for example in a mobile phone. In cameras and smartphone cameras, a device or algorithm for facial recognition or the recognition of other objects in the image is advantageously included (feature tracking), by means of which the imaging imaging system can implement focusing and recognition on a specific and selected feature in the image.

The additional image advantageously includes position information from individual areas in the image and / or movement information and can be recordable over a period of time.

According to the invention, in the method for operating a spectrometer device for spectrally analyzing light from an analysis object, a spectrometer device according to the invention is provided; imaging an image of the analysis object in an image plane on the image selection device by means of the first optical imaging device; dividing the image into several partial areas with the image selection device, with at least one of the partial areas representing a partial image of the analysis object and displaying at least one partial image on the diffuser element, the operation of the partial areas being switched on and / or off by the control device. In a further method step, the light is scattered from the at least one partial area on the diffuser element; and in a further method step, generating a wavelength spectrum of the light from the at least one partial area by the spectrometer device.
The method is also advantageously characterized by the features mentioned in connection with the spectrometer device and vice versa.

Due to the scattering on the diffuser element, position information from the partial areas can advantageously be lost and a homogeneous angle distribution and illumination of the spectrometer device can be achieved. When the device is switched on and off, and the detector device can always be active, it is advantageously scanned over the relevant or all partial areas in chronological order and location-dependent wavelength spectra (so-called hyperspectral data cubes) are generated.

According to a preferred embodiment of the method, the wavelength spectrum is generated by means of a detector device at a plurality of spatially arranged pixels of the detector device.

According to a preferred embodiment of the method, the wavelength spectrum is evaluated by the signal processing device.

According to a preferred embodiment of the method, partial areas to be analyzed by the spectrometer device are activated by the control device and the remaining partial areas are switched inactive and position information in the image is assigned to each partial area.

The position information enables precise localization of the partial image belonging to the respective partial area in the image of the analysis object.

According to a preferred embodiment of the method, only one sub-area or a plurality of sub-areas that can be analyzed simultaneously are activated in succession.

According to a preferred embodiment of the method, an additional image is generated by the analysis object with the imaging imaging system and position information of the partial areas is compared with the additional image, image information for identifying partial areas of the image to be analyzed is determined and / or a change in position of the analysis object is recognized and taken into account.

The identification and recognition of the change in position is advantageously carried out with regard to the additional image.

According to a preferred embodiment of the method, the imaging imaging system generates a selection of sub-areas of the image to be analyzed and activates them by the control device.

According to a preferred embodiment of the method, a movement of the analysis object is recognized in the image by the imaging imaging system and the selection of the sub-areas to be analyzed is aligned with this movement.

In the method, advantageously only an image section of the image relevant for data analysis can be recognized and selected. For this purpose, the image selection device can advantageously be controlled accordingly and corresponding partial areas can be activated. The data generated by the imaging imaging system can advantageously be used to recognize image changes occurring during the recording and to actively track the partial areas to be switched to actively change the image, whereby advantageously the exposure time and, for example, the time of the object analysis in the relevant partial image area can be extended.

By operating several sub-areas simultaneously, it can advantageously be selected whether a signal-to-noise ratio or a spatial resolution should be increased when analyzing the image. In the case of inhomogeneous samples, the selection of a relevant image area for the spectral analysis can advantageously achieve a reduction or even suppression of interference signals from the irrelevant image area. Furthermore, the computing power required for the spectral analysis can advantageously be reduced.

Further features and advantages of embodiments of the invention will become apparent from the following description with reference to the accompanying drawings.

list of figures

The present invention is explained in more detail below with reference to the exemplary embodiments given in the schematic figures of the drawing.

• 1 eine schematische Darstellung der Spektrometervorrichtung gemäß eines Ausführungsbeispiels der vorliegenden Erfindung;
• 2 eine schematische Darstellung der Spektrometervorrichtung gemäß eines weiteren Ausführungsbeispiels der vorliegenden Erfindung;
• 3 eine schematische Darstellung von Teilbereichen des Bildes an der Bildselektionseinrichtung;
• 4 eine schematische Darstellung von Teilbereichen des Bildes an der Bildselektionseinrichtung;
• 5 eine schematische Darstellung von Teilbereichen des Bildes an der Bildselektionseinrichtung; und
• 6 eine Abfolge von Verfahrensschritten gemäß eines Ausführungsbeispiels der vorliegenden Erfindung.

Show it:

• 1 a schematic representation of the spectrometer device according to an embodiment of the present invention;
• 2 a schematic representation of the spectrometer device according to a further embodiment of the present invention;
• 3 a schematic representation of partial areas of the image on the image selection device;
• 4 a schematic representation of partial areas of the image on the image selection device;
• 5 a schematic representation of partial areas of the image on the image selection device; and
• 6 a sequence of method steps according to an embodiment of the present invention.

In the figures, the same reference symbols designate the same or functionally identical elements.

1 shows a schematic representation of the spectrometer device according to an embodiment of the present invention.

The spectrometer device 10 for spectral analysis of a light L from an analysis object AO comprises a first optical imaging device 1a , for example a lens or a lens system with which an image B of the analysis object AO is reproducible; and a spectrometer device S with a diffuser element 4 and a detector device 5 , being on the diffuser element 4 Rays of light L are scatterable and from the scattered light beams with the spectrometer device S a wavelength spectrum of light L can be generated and the detector device 5 can comprise a plurality of spatially arranged pixels (not shown), with the pixels each having a different wavelength of light L can be detectable. The spectrometer device 10 comprises an image selection device 2 which in the image plane 3 is arranged and on which the picture B can be mapped, this on the image selection device 2 imageable image B through the image selection device 2 in several areas T1 to Tn can be subdivided, with a sub-image in each case with at least one of the subregions B1 to Bn of the analysis object AO the light can be displayed and when the subarea is in operation L from the drawing file to the diffuser element 4 is steerable. The spectrometer device 10 further comprises a control device SE , by means of which the operation of the subareas T1 until Tn can be switched on and / or off at the same time and / or at different times, and each partial area has position information in the image B is assignable.

A detailed view of the spectrometer device S is in a lower area of the 1 shown. Here is the arrangement of the detector device 5 and diffuser element 4 to see, with a spectral element between these two 7 can be arranged. The spectrometer device 10 can also have a second optical imaging device 1b , for example, a lens, which between the image selection device 2 and the diffuser element 4 can be arranged, and with which at least one partial image on the diffuser element 4 can be mapped.

At the image selection device 2 can be for any sub-area T1 to Tn a reflection RE or a transmission TA on the image selection device 2 are generated, by means of which the partial image from the partial area is applied to the spectrometer device S can be transferred. Here, the partial area is advantageous from the control device SE activated. The spectrometer device S and, if present, also the second optical imaging device 1b , for example from the analysis object AO seen from behind the image selection device 2 be arranged so that light under transmission TA can fall from the partial areas onto the spectrometer device S, or in front of the image selection device 2 be arranged at a certain angle of reflection of the partial areas, so that light under reflection RE from the sub-areas to the spectrometer device S can fall. It may also be possible to use two spectrometer devices S to provide, one behind the image selection device 2 and one in front of the image selection device 2 located. It may also be possible that some sub-areas are in transmission TA act and others in reflection and two spectrometer devices S can analyze spectra at the same time.

The position information of the partial areas can advantageously be used to draw a conclusion on the position dependencies of the measured spectra. An imaging capability of the spectrometer lost by the diffuser element can advantageously be restored in time by the position information and the image information of the image of the analysis object and hyperspectral images can be made possible again without an image of the analysis object having to be present in an input aperture of the spectrometer.

The image selection device 2 can, for example, an LCD matrix (for the transmission of the partial areas) or a switchable micromirror array (digital light processor, DLP to reflect the sub-areas). The transmitted or reflected light can advantageously be directed through the second imaging device to an entrance aperture of the spectrometer device. The spectrometer device is advantageously not imaging, but the image selection device advantageously defines position information relating to the image of the analysis object for each partial area.

2 shows a schematic representation of the spectrometer device according to a further embodiment of the present invention.

The arrangement of the elements in the spectrometer device according to the 2 corresponds to that of 1 , this in the 2 another imaging system 9 , such as a camera (e.g. Camera in the mobile phone, Si imager), by means of which an additional image For example, from the analysis object AO directly from the incident light L can be generated and compared with the position information of the partial areas. When the analysis object moves in the image, other sub-areas can be activated or deactivated accordingly. In this way, an efficiency of the spectrometer device can be increased, since advantageously only relevant sub-areas, which represent the analysis object, can be active and advantageously only spectra from these sub-areas contribute to the analysis. The advantage of the imaging imaging system 9 Detected changes in the analysis object (its position) can, for example, be taken into account and corrected in a later data evaluation, for example by mapping the generated spectra to a specific feature in the image (analysis object). The control unit SE can also be advantageous with the imaging imaging system 9 be connected and control this to record the intermediate image. The imaging imaging system 9 may include imaging optics, such as a lens, and recording electronics (camera, imager). The control unit SE can use the information from the imaging imaging system 9 compare with the spectra and the position information of the partial areas and switch the relevant partial areas accordingly, since the control unit SE can advantageously be connected to the spectrometer device and the image selection device at the same time.

3 shows a schematic representation of partial areas of the image on the image selection device.

The subareas T1 . T2 , etc. and others can, for example, divide the image like a grid into rectangular, in particular square, partial images. The analysis object AO can have a certain feature in a certain sub-picture Bn. A partial area can be outside the analysis object, wherever the partial images can also extend Ti . T1 etc. around an environment of the analysis object AO represent. Individual sub-areas can be created by a repetitive circuit process, for example triggered by the control unit and carried out by the image selection device Ti one after the other (arrow representation in the right image; the right image corresponds to the grid from the left image) can be activated and deactivated again until all sub-areas or at least the sub-areas that contain the analysis object AO represent, have sent light for spectral analysis. In this way, the hyperspectral image can advantageously be built up successively, as a result of which hyperspectral imaging can be achieved.

4 shows a schematic representation of partial areas of the image on the image selection device.

The light from the sub-areas Ti the image selection device and the analysis object AO can advantageously be radiated simultaneously from several partial areas onto the spectrometer device. The right picture of the 4 has sub-areas with the same numbers, which illustrates that these sub-areas can advantageously be active at the same time. The left picture shows a screening of the subareas over the picture of the analysis object. The right picture shows a grid of the partial areas, advantageously belonging to the left picture. The selection of the partial areas, which can advantageously be activated by the control device for forwarding the light, can advantageously be made randomly or on the basis of a defined selection, which is based on color information of the individual partial areas available or recognized in image Bn, for example by means of the additional image of the imaging imaging system. In this case, the approximation can advantageously be selected such that those subareas which can have similar color information (for example based on their color values red, green and blue), advantageously also similar or the same spectral signatures, can be activated at the same time. Alternatively, known segmentation algorithms can be used or methods of machine learning, in particular neural networks, in order to identify specific regions of the analysis object which are to be analyzed by the spectrometer device. As a result, a number of spectra to be recorded and generated can advantageously be significantly reduced.

Furthermore, it is advantageously possible for multivariate data analysis or chemometry to be carried out for evaluating the wavelength spectra, for example by means of the signal processing device. Data sets for multivariate data analysis, which are stored locally in the signal processing device or in an internal or external memory of the spectrometer device, can advantageously be used here. For this purpose, for example, communication (internet, wireless) with a database is also possible. Since the multivariate data analysis and / or chemometry can advantageously require a high degree of homogeneity of the sample to be analyzed, i.e. the analysis object, this can be taken into account in the activation of partial areas and several partial areas with the same spectral information to be expected can be activated simultaneously. Conversely, there may be samples in which several individual components of the sample may be present, for example a pizza or a dish in the case of a food analysis. It is also possible for chemometric assessment models to be available for individual components of a sample and for spectral information advantageously also for these components can be used, for example in the case of equality, to activate the corresponding partial areas simultaneously. In the case of an inhomogeneous sample, however, it is possible that the signal to be assessed is overlaid by a background that cannot be assessed. In the case of a complete hyperspectral image to be generated, an image section can be cut out, for example by the control unit, and the spectral information of the relevant section can be extracted by averaging spectral data. However, only the relevant area of the sample or image section can be directly spectrally analyzed. For this purpose, the image selection device, advantageously the active switching of the partial areas, can be controlled, for example, also dynamically during the generation of the wavelength spectra, by means of the additional image of the imaging imaging system of the sample or the analysis object, which is advantageously present in parallel (in time). The relevant image section can advantageously be recognized by object or pattern recognition, which is included, for example, as software by the imaging imaging system.

5 shows a schematic representation of partial areas of the image on the image selection device.

In the left image, a rasterization of partial areas of an image of an analysis object AO is shown, and in the right image a selection of relevant partial areas Ta of the analysis object AO, for a section of the image, which can be analyzed separately. By activating only the relevant sub-areas Ta, only the spectral information of this image section is advantageously recorded, which is advantageously sufficient for many applications and is advantageously much more resource-efficient than recording a full hyperspectral image and only then selecting the data from the relevant image section. It is also possible for a pattern and / or object recognition from the imaging system to be used to identify and correct external interference, such as a camera shake for a mobile phone. Object tracking, for example recognizable by appropriate software and / or hardware in the imaging system and / or the control device, can be used to dynamically readjust the relevant subareas, with the subareas being switched into active or inactive into which the analysis object is currently moving or moved out. A possible exposure time can thereby advantageously be increased many times over, and the signal-to-noise ratio (SNR) can thus be significantly improved.

The spectrometer device can advantageously be designed as a micro spectrometer.

6 shows a sequence of method steps according to an embodiment of the present invention.

The method for operating a spectrometer device for spectrally analyzing light from an analysis object is provided ( S1 ) a spectrometer device according to the invention; a mapping ( S2 ) an image of the analysis object in an image plane on the image selection device by means of the first optical imaging device; a dividing ( S3 ) of the image into a number of sub-areas with the image selection device, with at least one of the sub-areas displaying a sub-picture of the analysis object and imaging at least one sub-picture on the diffuser element, the operation of the sub-areas being switched on and / or off by the control device. Spreading is also carried out ( S4 ) the light from the at least one partial area on the diffuser element; and creating ( S5 ) a wavelength spectrum of the light from the at least one partial area through the spectrometer device.

Although the present invention has been completely described above on the basis of the preferred exemplary embodiment, it is not restricted thereto, but rather can be modified in many ways.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2015165266 A [0003]
• US 9329360 [0003]
• WO 2015015493 A2 [0004]

Claims (16)

A spectrometer device (10) for spectrally analyzing a light (L) from an analysis object (AO), comprising: - A first optical imaging device (1a) with which an image (B) of the analysis object (AO) can be imaged in an image plane (3); - A spectrometer device (S) with a diffuser element (4), a spectral element (7), and a detector device (5), light rays of the light (L) being scatterable on the diffuser element (4) and from the scattered light beams with the spectrometer device ( S) a wavelength spectrum of the light (L) can be generated; - an image selection device (2) which is arranged in the image plane (3) and on which the image (B) can be reproduced, the image (B) which can be reproduced on the image selection device (2) being divided into a plurality of subareas (2) by the image selection device (2) T1, T2, ..., Tn) can be subdivided, a partial image (B1, B2, ..., Bn) of the analysis object (AO) being able to be represented with at least one of the partial areas (T1, T2, ..., Tn) and in an operation of the partial area (T1, T2, ..., Tn) the light (L) from the partial image (B1, B2, ..., Bn) can be directed onto the diffuser element (4); and - A control device (SE), by means of which the operation of the partial areas (T1, T2, ..., Tn) can be switched on and / or off simultaneously and / or at different times and each partial area (T1, T2, ..., Tn ) position information in image (B) can be assigned. Spectrometer device (10) according to Claim 1 , in which the detector device (5) comprises a plurality of spatially arranged pixels. Spectrometer device (10) according to Claim 1 or 2 which comprises a signal processing device (8) by means of which the wavelength spectrum can be evaluated. Spectrometer device (10) according to one of the Claims 1 to 3 , in which a reflection (RE) or a transmission (TA) can be generated on the image selection device (2) for each sub-area (T1, T2, ..., Tn), by means of which the sub-image from the sub-area can be applied to the spectrometer device (S) is transferable. Spectrometer device (10) according to one of the Claims 1 to 4 which comprises a second optical imaging device (1b) which is arranged between the image selection device (2) and the diffuser element (4) and with which at least one partial image can be imaged on the diffuser element (4). Spectrometer device (10) according to one of the Claims 1 to 5 , wherein the spectral element (7) comprises a grating or an interference filter. Spectrometer device (10) according to one of the Claims 1 to 5 , wherein the spectral element (7) comprises a birefringent element. Spectrometer device (10) according to one of the Claims 1 to 7 which comprises an imaging imaging system (9), by means of which an additional image (ZB) of the analysis object (AO) can be generated. Method for operating a spectrometer device (10) for spectrally analyzing light (L) from an analysis object (AO), comprising the steps: - Providing (S1) a spectrometer device (10) according to one of the Claims 1 to 8th ; - imaging (S2) an image (B) of the analysis object (AO) in an image plane (3) on the image selection device (2) by means of the first optical imaging device (1a); - Subdivide (S3) the image (B) into a number of sub-areas (T1, T2, ..., Tn) with the image selection device (2), with a sub-image comprising at least one of the sub-areas (T1, T2, ..., Tn) (B1, B2, ..., Bn) of the analysis object (AO) and depicting at least one partial image on the diffuser element (4), the operation of the partial areas (T1, T2, ..., Tn) is switched on and / or off; - Scattering (S4) of the light (L) from the at least one partial area (T1, T2, ..., Tn) on the diffuser element (4); and - generating (S5) a wavelength spectrum of the light (L) from the at least one partial region (T1, T2, ..., Tn) by the spectrometer device (S). Procedure according to Claim 9 The wavelength spectrum is generated (S5) by means of a detector device (5) at a plurality of spatially arranged pixels of the detector device (5). Procedure according to Claim 9 or 10 , in which the wavelength spectrum is evaluated by the signal processing device (8). Procedure according to one of the Claims 9 to 11 , in which sub-areas to be analyzed by the spectrometer device (T1, T2, ..., Tn) are activated by the control device (SE) and the other sub-areas are switched inactive and each sub-area (T1, T2, ..., Tn) is given position information in the picture (B). Procedure according to Claim 12 , in which only one sub-area (T1, T2, ..., Tn) or several sub-areas (T1, T2, ..., Tn) that can be analyzed simultaneously are activated. Procedure according to one of the Claims 9 to 13 , in which an additional image (ZB) of the analysis object (AO) with the imaging imaging system (9) is generated and position information of the sub-areas (T1, T2, ..., Tn) is compared with the additional image (ZB), image information for identifying sub-areas (T1, T2, ..., Tn) of the image is determined and / or a change in position of the analysis object (AO) is recognized and taken into account. Procedure according to Claim 14 , in which a selection of sub-areas (T1, T2, ..., Tn) of the image (B) to be analyzed is generated with the imaging imaging system (9) and these are activated by the control device (SE). Procedure according to Claim 15 , in which a movement of the analysis object (AO) is recognized by the imaging imaging system (9) in the image (B) and the selection of the sub-areas to be analyzed (T1, T2, ..., Tn) is aligned with this movement.

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