CN117990659A - Spectrum detection device - Google Patents

Abstract

The embodiment of the application provides a spectrum detection device, which comprises a light source generator, a plurality of optical fiber probes, a multi-core optical fiber and an analysis component, wherein the optical fiber probes are respectively connected with the light source generator, and light rays emitted by the light source generator are emitted from the optical fiber probes; one end of the multi-core optical fiber is respectively connected with a plurality of optical fiber probes, the other end of the multi-core optical fiber comprises a plurality of ports which are arranged along a first direction, and the ports are in one-to-one correspondence with the optical fiber probes; the analysis component is respectively connected with the ports to respectively receive the spectrum information acquired by the optical fiber probe through the ports, and the analysis component is used for respectively generating spectrum sub-images according to the spectrum information sent by the ports. The spectrum detection device provided by the embodiment of the application can detect a plurality of different substances of one sample or a plurality of samples at the same time, and improves the timeliness and the analysis efficiency of detection.

Description

Spectrum detection device

Technical Field

The application relates to the technical field of optical detection, in particular to a spectrum detection device.

Background

Scattering occurs when light impinges on a substance. When scattering occurs, most of the scattered light does not change in wavelength, and scattering in which the wavelength does not change is called Rayleigh scattering; the wavelength of a small fraction of the scattered light increases or decreases, and the scattering of this wavelength change is called raman scattering and its corresponding spectrum is called raman spectrum. The raman spectrum belongs to the vibration spectrum of molecules, and can be used as a "fingerprint" for identifying a substance because the object to be detected can be qualitatively analyzed by detecting the raman spectrum of the substance.

With the continuous improvement of market demands, in the fields of biopharmaceuticals, chemical online and the like, a spectrum detection device based on raman spectrum is generally required to detect different positions of one sample or a plurality of samples so as to obtain a plurality of raman spectrograms corresponding to different samples or different positions of the same sample. In the prior art, the spectrum detection device is usually single-point detection, only one position of one sample can be detected at a time, raman spectrograms corresponding to a plurality of samples or a plurality of positions cannot be output at the same time, and the detection efficiency is low.

Disclosure of Invention

The spectrum detection device provided by the application can detect a plurality of different positions of one sample or a plurality of samples at the same time, and improves the timeliness and analysis efficiency of detection.

An embodiment of a first aspect of the present application provides a spectrum detection apparatus, including a light source generator, a plurality of optical fiber probes, a multi-core optical fiber, and an analysis component, where the plurality of optical fiber probes are respectively connected to the light source generator, and light emitted by the light source generator is emitted from the optical fiber probes; one end of the multi-core optical fiber is respectively connected with a plurality of optical fiber probes, the other end of the multi-core optical fiber comprises a plurality of ports which are arranged along a first direction, and the ports are in one-to-one correspondence with the optical fiber probes; the analysis component is respectively connected with the ports to respectively receive the spectrum information acquired by the optical fiber probe through the ports, and the analysis component is used for respectively generating spectrum sub-images according to the spectrum information sent by the ports.

According to an embodiment of the first aspect of the present application, the analysis assembly includes a spectrometer and a light sensing element, the spectrometer is connected to the optical fiber probe through a multi-core optical fiber, the spectrometer is disposed corresponding to the light sensing element, and the spectrometer is configured to receive the spectral information collected by the optical fiber probe and transmit the spectral information to the light sensing element, so that the spectral information forms spectral sub-images on the light sensing element along the second direction respectively.

According to any one of the foregoing embodiments of the first aspect of the present application, the light sensing element is configured to sequentially arrange a plurality of spectral sub-images along a first direction to form a spectral image.

According to any one of the foregoing embodiments of the first aspect of the present application, the first spectral sub-images are ordered in the first direction into a first order L1, the first ports are ordered in the first direction into a second order L2, l1=l2, the plurality of spectral sub-images include the first spectral sub-images, the plurality of ports include the first ports, and the photo-sensing element is configured to generate the first spectral sub-images according to the spectral information sent by the first ports.

According to any one of the foregoing embodiments of the first aspect of the present application, the multicore optical fiber includes an optical fiber bundle and a plurality of branch optical fibers that are disposed independently of each other, one ends of the plurality of branch optical fibers are respectively connected to the optical fiber bundle, and the other ends of the plurality of branch optical fibers are respectively connected to the plurality of optical fiber probes in one-to-one correspondence, and one end of the optical fiber bundle includes a plurality of ports arranged along the first direction.

According to any one of the foregoing embodiments of the first aspect of the present application, the optical fiber probe includes a plurality of optical lenses, the plurality of optical lenses includes a first lens, a second lens, and a filter, the light-emitting direction of the first lens is opposite to the light-emitting direction of the second lens, the filter is capable of filtering and refracting a first light emitted from the first lens and transmitting a second light to the second lens, the first light and the second light have different wavelengths, the first light is a light emitted from the light source generator, and the second light is collected by the branch optical fiber.

According to any of the foregoing embodiments of the first aspect of the present application, one end of the optical fiber bundle is connected to each of the branch optical fibers and collects the second light collected by each of the branch optical fibers, and the ports are respectively in one-to-one correspondence with the branch optical fibers and connected to the spectrometer.

According to any one of the embodiments of the first aspect of the present application, the spectrometer includes a first lens, a transmission grating and a second lens arranged along the optical path direction, the first lens collimates the second light and then emits a plurality of third light through the transmission grating, and the third light is emitted to the light sensing element through the second lens and imaged along the second direction.

According to any of the foregoing embodiments of the first aspect of the present application, the light sensing element further includes a cooling element for reducing the temperature of the light sensing element.

According to any of the preceding embodiments of the first aspect of the present application, each of the branch optical fibers comprises at least one optical fiber.

In the spectrum detection device provided by the embodiment of the application, the spectrum detection device comprises a light source generator, a plurality of optical fiber probes, a multi-core optical fiber and an analysis component, wherein light rays emitted by the light source generator can be emitted from each optical fiber probe, the light rays can be irradiated to different samples or different positions of the same sample at the same time, and spectrum information of different samples and/or different positions is collected through the optical fiber probes; the collected spectrum information is transmitted to ports arranged along a first direction through multi-core optical fibers, wherein each port corresponds to different optical fiber probes one by one, so that the spectrum information of different samples and/or different positions is/are arranged at each port; the analysis component analyzes the spectral information collected at the different ports to generate spectral sub-images. Therefore, the spectrum detection device can analyze a plurality of samples or a plurality of points of one sample at the same time by only using one analysis component, thereby improving the timeliness and the detection efficiency of the spectrum detection device and reducing the equipment cost.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings in which like or similar reference characters designate the same or similar features.

FIG. 1 is a schematic diagram of a spectrum detection apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a multi-core optical fiber according to an embodiment of the present application;

FIG. 3 is a schematic top view of an analysis assembly according to one embodiment of the present application;

FIG. 4 is an image of a light sensing element according to one embodiment of the present application;

FIG. 5 is a schematic diagram of a fiber optic probe according to one embodiment of the present application;

FIG. 6 is a schematic diagram of a light source generator according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another light source generator according to an embodiment of the present application.

Reference numerals illustrate:

100. a spectrum detection device; x, a first direction; y, second direction;

10. A light source generator; 11. a laser; 12. a third lens; 13. a second mirror; 20. an optical fiber probe; 21. a first lens; 21a, a first ray; 22. a second lens; 22a, a second ray; 231. a first mirror; 232. a dichroic mirror; 24. a bandpass filter; 25. a long-pass filter; 26. an objective lens; 30. a multi-core optical fiber; 31. an optical fiber bundle; 311. a port; 32. branching optical fibers; 40. an analysis component; 41. a spectrometer; 411. a first lens; 412. a transmission grating; 413. a second lens; 42. a light sensing member; 50. a laser fiber; 60. raman signal fiber.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

For a better understanding of the present application, a spectrum sensing apparatus according to an embodiment of the present application will be described in detail with reference to fig. 1 to 7.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a spectrum detection apparatus according to an embodiment of the application; fig. 2 is a schematic structural diagram of a multicore fiber according to an embodiment of the present application.

An embodiment of the first aspect of the present application provides a spectrum detection apparatus 100, where the spectrum detection apparatus 100 includes a light source generator 10, a plurality of optical fiber probes 20, a multi-core optical fiber 30, and an analysis component 40, and the plurality of optical fiber probes 20 are respectively connected to the light source generator 10, and light emitted by the light source generator 10 is emitted from the optical fiber probes 20; one end of the multi-core optical fiber 30 is respectively connected with a plurality of optical fiber probes 20, and the other end of the multi-core optical fiber 30 comprises a plurality of ports 311 which are arranged along the first direction X, and the ports 311 are in one-to-one correspondence with the optical fiber probes 20; the analysis component 40 is respectively connected with the ports 311 to respectively receive the spectrum information collected by the fiber probe 20 through the ports 311, and the analysis component 40 is used for respectively generating spectrum sub-images according to the spectrum information sent by the ports 311.

As shown in fig. 1 and 2, in an embodiment of the present application, the light source generator 10 may serve as a light emitting source of the entire spectrum sensing apparatus 100. Optionally, the light source generator 10 may be arranged in multiple manners, for example, the light source generator 10 may be arranged into multiple lasers 11, and each laser 11 is connected to a different optical fiber probe 20, so that a light source with high light intensity and continuous light source can be provided for each optical fiber probe 20, so that more stable spectrum information can be obtained, and the detection accuracy of the spectrum detection device 100 is improved; it is also possible to arrange only one laser 11 with higher power in the light source generator 10, and arrange a plurality of optical lenses along the light path direction of the light emitted by the laser 11, split the light emitted by the laser 11 into a plurality of light beams through the optical lenses, and respectively emit each light beam from different optical fiber probes 20, so that only one laser 11 is required to be arranged to obtain a plurality of light sources, thereby saving the equipment cost.

In the embodiment of the present application, the light source generator 10 can provide a continuous and stable light source for the spectrum detection device 100, where the wavelength and type of the light source can be selected according to the actual requirement, the specific type and specific wavelength of the light source are not limited in the art, and the light source generator 10 can provide a light source with a narrow line width, stable frequency and stable power, and the application is not repeated herein.

In one example, taking the raman excitation light emitted by the light source generator 10 as an illustration, the spectrum detection apparatus 100 may further include a plurality of laser fibers 50, and optionally, fiber interfaces may be disposed on the fiber optic probes 20 correspondingly, where each fiber optic probe 20 is connected to a different laser fiber 50 and the light source generator 10 respectively through the fiber interfaces.

Optionally, a plurality of optical lenses may be disposed in the optical fiber probe 20, and an optical aperture may be disposed on the optical fiber probe 20, and the light emitted by the light source generator 10 is transmitted to the optical lenses through the laser optical fiber 50, and then collimated by the optical lenses, and emitted from the optical aperture and irradiated onto the inspected object, so as to excite the inspected object to emit raman light, the optical lenses collect the raman light excited by the inspected object, and then transmit the collected raman light to the analysis component 40 for analysis to obtain a raman spectrum image, thereby completing raman detection of the inspected object. The raman light collected by the fiber optic probe 20 is spectral information, and the sample to be detected may be a solid, gas or liquid sample.

In these alternative embodiments, each fiber optic probe 20 is capable of simultaneously performing spectral detection on a different sample or at a different location on the same sample, thereby improving the timeliness of spectral detection by the spectral detection device 100.

The multi-core optical fiber 30 is an optical fiber containing multiple cores in a single package, and the first direction X is taken as a vertical direction for example to describe the setting mode of the multi-core optical fiber 30, for example, one end of the multi-core optical fiber 30 may be set to be a plurality of raman signal optical fibers 60 which are discretely arranged, and the raman signal optical fibers 60 are connected with the optical fiber probes 20 to be used for collecting spectrum information collected by the optical fiber probes 20, wherein the number of the raman signal optical fibers 60 is consistent with that of the optical fiber probes 20, each raman signal optical fiber 60 corresponds to each port 311 in the multi-core optical fiber 30, so that the spectrum information collected by each optical fiber probe 20 can be analyzed at the corresponding port 311, and thus, the spectrum information collected by each optical fiber probe 20 can be analyzed to obtain raman spectra of different samples or different positions of the same sample, so that different ports 311 and different optical fiber probes 20 are in one-to-one correspondence, and the accuracy of the spectrum detection device 100 is improved.

In the embodiment of the present application, the analysis component 40 is respectively connected to each port 311 of the multi-core optical fiber 30, so that the spectral information collected by each port 311 can be collected and analyzed, that is, the spectral detection device 100 can respectively set the spectral information collected by different samples or different positions of the same sample at different channels, one port 311 corresponds to one channel, further, the spectral information of different channels is analyzed and imaged along the direction of the channel, that is, a spectral sub-image is obtained along the second direction Y, and further, the spectral sub-image is analyzed to obtain raman spectral diagrams of different samples or different positions of the same sample, so that the same set of analysis component 40 can perform simultaneous measurement analysis on the spectral information obtained by different optical fiber probes 20, and the analysis efficiency of the spectral detection device 100 is improved. The second direction Y is the direction marked in fig. 4, and the second direction Y may be changed along with the change of the direction of the imaged image, which is not limited by the present application. In these alternative embodiments, the spectral sub-images obtained at the analysis different ports 311 can be imaged at different heights along the first direction X, and the spectral sub-images are imaged along the same direction, i.e., the second direction Y, facilitating subsequent analysis and de-spectra, thereby improving the efficiency of the spectral detection apparatus 100 in analyzing the spectral sub-images.

In the spectrum detection apparatus 100 provided by the embodiment of the present application, the spectrum detection apparatus 100 includes a light source generator 10, a plurality of optical fiber probes 20, a multi-core optical fiber 30 and an analysis component 40, wherein, light rays emitted by the light source generator 10 can be emitted from each optical fiber probe 20, and the light rays can be simultaneously irradiated to different samples and/or different positions, and spectrum information of the different samples and/or different positions is collected by the optical fiber probes 20; the collected spectrum information is transmitted to ports 311 arranged along the first direction X through the multi-core optical fiber 30, wherein each port 311 corresponds to a different optical fiber probe 20 one by one, and thus, the spectrum information of different samples and/or different positions is provided at each port 311; the analysis component 40 analyzes the spectral information collected at the different ports 311 to generate spectral sub-images. Therefore, the spectrum detection device 100 of the application can analyze a plurality of samples or a plurality of points of one sample at the same time by only using one analysis component 40, thereby improving the timeliness and the detection efficiency of detection and reducing the equipment cost.

Referring to fig. 3 to 5 in combination, fig. 3 is a schematic structural diagram of an analysis assembly according to an embodiment of the present application; FIG. 4 is a schematic diagram of the internal structure of an analysis assembly according to one embodiment of the present application; fig. 5 is an image of a photo sensor provided in an embodiment of the application.

In some alternative embodiments, the analysis assembly 40 includes a spectrometer 41 and a light sensing element 42, the spectrometer 41 is connected to the optical fiber probe 20 through the multi-core optical fiber 30, the spectrometer 41 is disposed corresponding to the light sensing element 42, and the spectrometer 41 is configured to receive the spectral information collected by the optical fiber probe 20 and send the spectral information to the light sensing element 42, so that the spectral information forms spectral sub-images on the light sensing element along the second direction Y, respectively.

In these alternative embodiments, as shown in fig. 4 and 5, the spectrometer 41 may be a raman spectrometer, an infrared spectrometer, etc., and the present application is not limited to the specific type of spectrometer 41, and will be described below by taking a raman spectrometer as an example. The light sensing element 42 may be an area array CCD camera. In an embodiment, the photosensitive mode of the CCD camera may be a back-side camera, and the back-side camera has higher sensitivity than the front-side camera, so that the imaging speed of the CCD camera can be increased, and further the detection time of the spectrum detection device 100 can be shortened, especially when the long-time laser irradiation is not allowed for some biological samples, the spectrum detection device 100 capable of shortening the detection time of the spectrum detection device 100 has a stronger measurement advantage. The above-mentioned changes and modifications to the photosensitive mode of the CCD camera do not deviate from the principle and scope of the present application, and should be limited in the scope of protection of the present application.

Alternatively, the size of the pixels of the CCD camera may be 1024×256, 1024×512, 2048×256, etc., and a person skilled in the art may select the pixels according to actual needs, and, for example, if the size of the pixels is 1024×256, if there are three optical fiber probes 20, 256 pixels along the vertical direction of the light sensing element 42, that is, the first direction X, are divided into three regions, each region corresponds to the spectral information collected by one port 311, where the spectral information emitted by each port 311 disposed along the first direction X passes through the spectrometer 41 and then impinges on the pixel corresponding to the position of the CCD camera, and the raman light with different wavelengths, that is, the spectral information passes through the spectrometer 41 and impinges on the pixel corresponding to the CCD camera in the second direction Y, so as to obtain the pixel data, that is, the spectral sub-image, and the spectral sub-image is analyzed to obtain the corresponding raman spectral image. Each region, i.e., each port 311, finally outputs a raman spectrum, where each raman spectrum represents the spectral information collected by each optical fiber probe 20, so that the spectral information of three optical fiber probes 20 can be detected simultaneously, and if the number of probes is increased, the pixels along the longitudinal direction are equally divided into the number of regions corresponding to the number of optical fiber probes 20, i.e., the number of ports 311, according to the length of the CCD camera along the longitudinal direction, i.e., the first direction X.

In these alternative embodiments, only one spectrometer 41 and one light sensing element 42 are needed to analyze the spectrum information of multiple samples or different positions of the same sample in real time, so as to realize the low-cost multi-point spectrum detection and further improve the detection efficiency and timeliness of the spectrum detection device 100.

As shown in fig. 3 and 4, in some alternative embodiments, the light sensing element 42 is configured to sequentially align a plurality of spectral sub-images along the first direction X to form a spectral image.

In these alternative embodiments, the spectral information emitted from each port 311 passes through the spectrometer 41 and then impinges on the light sensing element 42, and the raman light with different wavelengths, i.e., the spectral information, passes through the spectrometer 41 and then impinges on the light sensing element 42 at different horizontal positions, i.e., in the second direction Y, to generate different spectral sub-images. Since the ports 311 are arranged at different heights along the first direction, the spectral sub-images generated by the light sensing element 42 are also correspondingly arranged at different heights along the first direction X of the light sensing element 42, and then the spectral sub-images can be analyzed, so as to obtain corresponding raman spectrograms, i.e., spectral images. In these alternative embodiments, the spectral sub-images are imaged in one direction, facilitating subsequent analysis and de-spectra, improving the efficiency with which the spectral detection device 100 analyzes spectral information to obtain spectral images.

In some alternative embodiments, the first spectral sub-images are ordered in a first order L1 along the first direction X, the first ports are ordered in a second order L2 along the first direction X in a plurality of ports 311, l1=l2, the plurality of spectral sub-images comprise the first spectral sub-images, the plurality of ports 311 comprise the first ports, and the light sensing element 42 is configured to generate the first spectral sub-images according to the spectral information transmitted by the first ports.

In the embodiment of the present application, the first direction X may be a longitudinal direction of the light sensing element 42, so the first direction X may be changed along with the arrangement direction of the light sensing element 42, and the present application is not limited to a specific direction of the first direction X, as long as it intersects with the second direction Y. The included angle between the first direction X and the second direction Y is not limited, and the two directions are not parallel.

In these alternative embodiments, the arrangement order of the plurality of spectral sub-images generated by each port 311 in the first direction X, that is, the longitudinal direction of the light sensing member 42, is the same as the arrangement order of the plurality of ports 311 in the first direction X, so that the subsequent spectral sub-images can be directly analyzed in order, so that different samples or spectral images at different positions of the same sample collected by each fiber probe 20 corresponding to each port 311 can be obtained, and since the arrangement order of the ports 311 is the same as the arrangement order of the spectral sub-images, it is convenient for the subsequent user to sort the obtained spectral images, thereby improving the efficiency and accuracy of the detection of the spectral detection device 100.

As shown in fig. 2, in some alternative embodiments, the multi-core optical fiber 30 includes an optical fiber bundle 31 and a plurality of branch optical fibers 32 disposed independently of each other, one ends of the plurality of branch optical fibers 32 are respectively connected to the optical fiber bundle 31, and the other ends of the plurality of branch optical fibers 32 are respectively connected to the plurality of optical fiber probes 20 in a one-to-one correspondence manner, and one end of the optical fiber bundle 31 includes a plurality of ports 311 aligned along the first direction X.

In these alternative embodiments, each of the branch optical fibers 32 is connected to a different fiber probe 20 for transmitting the spectral information collected by the different fiber probes 20, wherein the number of branch optical fibers 32 corresponds to the number of fiber probes 20, and the greater the number of fibers of each branch optical fiber 32, the higher the transmission efficiency, as will be appreciated by those skilled in the art.

Illustratively, the plurality of branch optical fibers 32 are collected by the optical fiber bundles 31, and each port 311 on each optical fiber bundle 31 corresponds to a different branch optical fiber 32, so that different samples collected by different optical fiber probes 20 or different spectrum information at different positions of the same sample can be distinguished, and the detection accuracy of the spectrum detection device 100 is improved.

Referring to fig. 5 in combination, fig. 5 is a schematic structural diagram of a fiber optic probe according to an embodiment of the present application.

In some alternative embodiments, the fiber optic probe 20 includes a plurality of optical lenses, the plurality of optical lenses including a first lens 21, a second lens 22, and a filter, the light exiting direction of the first lens 21 is opposite to the light exiting direction of the second lens 22, the filter is capable of filtering and refracting a first light ray 21a exiting from the first lens 21 and transmitting a second light ray 22a to the second lens 22, the first light ray 21a and the second light ray 22a have different wavelengths, the first light ray 21a is a light ray emitted from the light source generator 10, and the second light ray 22a is collected by the branch optical fiber 32.

In these alternative embodiments, as shown in fig. 5, the first lens 21 is a collimating lens, and the laser light emitted from the light source generator 10 is transmitted to the focal plane of the collimating lens via the laser fiber 50 to collimate the laser light; the plurality of optical lenses further include a bandpass filter 24 and a long-pass filter 25, and the laser beam collimated by the first lens 21 can be filtered by the bandpass filter 24 to remove rayleigh scattered light and stray light in the laser beam, and the stray light mainly comes from spontaneous radiation of the light source generator 10. The filter according to the embodiment of the present application includes a dichroic mirror 232 and a first reflecting mirror 231, the laser beam filtered by the bandpass filter 24 can be refracted onto the dichroic mirror 232 by the first reflecting mirror 231, the dichroic mirror 232 refracts the laser beam onto the objective lens 26 to focus, and the focused laser beam is emitted from the light outlet hole of the optical fiber probe 20 and irradiates onto the inspected object, thereby exciting the inspected object to emit raman light, i.e., spectral information. Wherein the first lens 21, the bandpass filter 24 and the first reflecting mirror 231 are coaxially arranged in this order. The light path direction of the laser light passing through the first lens 21, the bandpass filter 24, the first reflecting mirror 231, the dichroic mirror 232, and the objective lens 26 in this order is a first light path, and the first light ray 21a is a light ray emitted along the first light path.

In the embodiment of the present application, the dichroic mirror 232 uses a filter having an incident angle of 45 degrees. Of course, the dichroic mirror 232 may be a filter having an incident angle of other angles, for example, about 5 degrees, and may reflect the laser wavelength and transmit light having a wavelength longer than the laser wavelength when the light is incident at the angle.

In the embodiment of the present application, the raman light emitted by the inspected object can be collected and collimated by the objective lens 26, and because the filtering characteristic of the dichroic mirror 232 can transmit the raman light with a wavelength longer than that of the emitted laser light, the dichroic mirror 232 can transmit the collimated raman light to the long-pass filter 25 to remove the rayleigh scattered light in the raman light, the raman light filtered by the long-pass filter 25 is collected by the second lens 22, and the collected raman light is transmitted to the analysis component 40 for raman detection through the raman signal fiber 60 and the multicore fiber 30. In embodiments of the present application, the second lens 22 is a focusing lens, alternatively, an achromatic lens may be used as the focusing lens. The second lens 22 focuses and ultimately transmits the raman light into the analysis assembly 40, and it will be readily understood by those skilled in the art that the second lens 22 can also be other lenses, such as a coupling lens, so long as the raman light filtered by the long pass filter 25 can be collected, and the present application is not limited thereto. The long-pass filter 25 has a higher reflectivity for the laser wavelength and a higher transmittance for light having a wavelength longer than the laser wavelength; the long-pass filter 25 can also be replaced by a notch filter, which has a higher reflectivity only for the light of the laser wavelength, and a higher transmissivity for the light of other wavelengths, and the incident angle is determined according to the use requirement.

Alternatively, the long-pass filter 25 and the second lens 22 are coaxially disposed in order. The optical path direction of the raman light sequentially passing through the objective lens 26, the dichroic mirror 232, the long-pass filter 25, and the second lens 22 is a second optical path, wherein the second light 22a is a light emitted along the second optical path, and the wavelength of the second light 22a is longer than the wavelength of the first light 21 a. The bandpass filter 24 and the long-pass filter 25 cooperate to meet the requirement of blocking Rayleigh light, so that optical elements used in the optical fiber probe 20 are reduced, the cost of the optical fiber probe 20 is reduced, and the miniaturization of the optical fiber probe 20 is facilitated.

In some alternative embodiments, one end of the optical fiber bundle 31 is connected to each of the branch optical fibers 32 and collects the second light ray 22a collected by each of the branch optical fibers 32, and a plurality of ports 311 are respectively connected to the branch optical fibers 32 in a one-to-one correspondence, and the ports 311 are connected to the spectrometer 41.

In these alternative embodiments, one end of the optical fiber bundle 31 is connected to each of the branch optical fibers 32, and each of the branch optical fibers 32 is arranged in a concentrated manner within the optical fiber bundle 31, each of the branch optical fibers 32 being disposed in one-to-one correspondence with a respective port 311, each port 311 representing a branch optical fiber 32 of one of the fiber probes 20. The ports 311 are directly connected with the spectrometers 41, and the spectrometer 41 performs imaging analysis on the branch optical fibers 32 of each port 311 to obtain a spectral image, i.e. a Raman spectrogram, of the corresponding optical fiber probe 20, so that the same spectrometer 41 can perform simultaneous measurement and analysis on different optical fiber probes 20, and the detection efficiency and the detection timeliness of the spectrum detection device 100 are improved; and each port 311 corresponds to each branch optical fiber 32 one by one, so that different samples collected by different optical fiber probes 20 or different spectrum information at different positions of the same sample can be distinguished, and the detection accuracy of the spectrum detection device 100 is further improved.

As shown in fig. 3 and 4, in some alternative embodiments, the spectrometer 41 includes a first lens 411, a transmission grating 412 and a second lens 413 disposed along the optical path direction, where the first lens 411 collimates the second light 22a and then emits a plurality of third light rays through the transmission grating 412, and the third light rays are emitted onto the light sensing element 42 through the second lens 413 and imaged along the second direction Y.

In these alternative embodiments, the first lens 411 is a collimating lens group and the second lens 413 is a focusing lens group, wherein the first lens 411 may comprise a collimating lens and the second lens 413 may comprise a focusing lens.

In one possible embodiment of the present application, the first lens 411 includes a collimating lens, where the collimating lens is used to collect raman scattered light, shield stray light, and provide stable input with high signal-to-noise ratio to subsequent optical elements after collimating the spectral information collected by the multi-core optical fiber 30, i.e., the raman light; the transmission grating 412 can disperse and decompose the raman scattered light collimated by the first lens 411 into a plurality of third light rays with different wavelengths; the second lens 413 includes a focusing lens capable of focusing the third light onto the light sensing element 42 for imaging.

In the embodiment of the present application, the linearly arranged ports 311 guide raman light (spectrum information) into the spectrometer 41, the light emitted from the branch optical fibers 32 with different heights will strike the pixels at the corresponding height positions of the light sensing element 42, and the light with different wavelengths in the raman light passes through the transmission grating 412 and strikes the pixels at different horizontal positions, that is, images are formed in the second direction Y, so that the pixel data can be processed in a line manner, and the spectrum images at the different ports 311, that is, the raman spectrograms, are obtained.

In some alternative embodiments, light sensing element 42 further includes a cooling element for reducing the temperature of light sensing element 42.

In these alternative embodiments, the refrigerating element may be a TEC (Thermo Electric Cooler, semiconductor refrigerator), and in one embodiment, the CCD chip in the light sensing element 42 may be cooled to-60 to-80 ℃ by the refrigerating element, so that noise generated by the light sensing element 42 during operation can be reduced, and the light sensing element 42 can obtain better signal quality. It is easy to understand that the present application is not limited to a specific arrangement mode and specific refrigeration temperature of the refrigeration member, and those skilled in the art can set different types of refrigeration members and different refrigeration temperatures according to actual needs.

In some alternative embodiments, each branch optical fiber 32 includes at least one optical fiber.

In these alternative embodiments, the number of fibers of the branch optical fiber 32 can characterize the transmission efficiency of the optical fiber, with the greater the number of fibers, the higher the transmission efficiency of the optical fiber. Optionally, the number of optical fibers of each branch optical fiber 32 may be the same, so as to ensure that the transmission efficiency of the spectrum information collected by each optical fiber probe 20 is the same, thereby ensuring that samples of the same batch can be processed simultaneously, and improving the timeliness of detection by the spectrum detection device 100; of course, the number of the optical fibers of the branch optical fibers 32 may be different, so that raman spectra of the same sample at different times can be measured, and the applicability of the spectrum detection apparatus 100 is improved. The above-described variations and modifications in the number of optical fibers 32 should not depart from the spirit and scope of the present application and are intended to be within the scope of the present application.

Referring to fig. 6 and fig. 7 in combination, fig. 6 is a schematic structural diagram of a light source generator according to an embodiment of the present application; fig. 7 is a schematic diagram of another light source generator according to an embodiment of the present application.

In some alternative embodiments, the light source generator 10 includes several lasers 11, and several lasers 11 are respectively connected to different fiber probes 20 in a one-to-one correspondence.

As shown in fig. 6, the laser 11 may alternatively be one or more selected from a solid state laser, a gas laser, a liquid laser, and a semiconductor laser, thereby providing a stable light source for the fiber probe 20. Specifically, in the embodiment of the present application, the laser 11 may be laser diodes, and the laser light emitted by each laser diode transmits the laser light into the fiber optic probe 20 through the laser fiber 50, so as to excite the sample to be tested to generate raman light.

In these alternative embodiments, the laser 11 can provide a powerful and continuous light source for each fiber optic probe 20, so that a more stable and better quality spectral image can be obtained, and the accuracy of the detection by the spectral detection device 100 can be improved.

As shown in fig. 7, in some alternative embodiments, the light source generator 10 includes one laser 11, n third lenses 12 and n second mirrors 13, a part of light emitted from the laser 11 is transmitted to the next third lens 12 through the third lenses 12, another part of light sequentially passes through the reflection of the third lens 12 and the reflection of the second mirrors 13 to the next third lens 12, and the light emitted from the laser 11 finally exits from the nth third lens 12 and the nth second mirrors 13 and becomes 2n light beams, each of which exits from the different fiber optic probes 20.

Alternatively, the third lens 12 is a half-reflecting half-lens, and the third lens 12 is capable of transmitting half of the light rays and refracting the other half of the light rays, thereby becoming two light rays.

In these alternative embodiments, the light emitted by the laser 11 is split into several light beams by the third lens 12 and the second mirror 13, and each light beam is emitted from the different fiber probes 20, so that only one laser 11 needs to be arranged to obtain several light sources, and the cost of the device is greatly saved.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.

Claims (10)

1. A spectral detection device, the spectral detection device comprising:

A light source generator;

the optical fiber probes are respectively connected with the light source generator, and light rays emitted by the light source generator are emitted from the optical fiber probes;

The multi-core optical fiber comprises a plurality of multi-core optical fibers, wherein one end of each multi-core optical fiber is connected with a plurality of optical fiber probes, the other end of each multi-core optical fiber comprises a plurality of ports which are arranged along a first direction, and the ports are in one-to-one correspondence with the optical fiber probes;

The analysis component is respectively connected with the ports so as to respectively receive the spectrum information acquired by the optical fiber probe through the ports, and the analysis component is used for respectively generating spectrum sub-images according to the spectrum information sent by the ports.

2. The spectral detection device according to claim 1, wherein the analysis assembly comprises a spectrometer and a light sensing member, the spectrometer is connected with the optical fiber probe through the multi-core optical fiber, the spectrometer is arranged corresponding to the light sensing member, and the spectrometer is configured to receive the spectral information collected by the optical fiber probe and transmit the spectral information to the light sensing member, so that the spectral information forms the spectral sub-image on the light sensing member along a second direction respectively.

3. The spectral detection apparatus according to claim 2, wherein the light sensing member is configured to sequentially arrange a plurality of the spectral sub-images along the first direction to form a spectral image.

4. The spectral detection apparatus according to claim 2, wherein the ordering of the first spectral sub-image in the first direction is a first order L1, the ordering of the first port in the first direction is a second order L2, l1=l2, the plurality of spectral sub-images including the first spectral sub-image, the plurality of ports including the first port, the light sensing element being configured to generate the first spectral sub-image from the spectral information transmitted by the first port.

5. The spectrum sensing device according to claim 2, wherein the multi-core optical fiber comprises an optical fiber bundle and a plurality of branch optical fibers which are arranged independently of each other, one ends of the plurality of branch optical fibers are respectively connected with the optical fiber bundle, the other ends of the plurality of branch optical fibers are respectively connected with the plurality of optical fiber probes in one-to-one correspondence, and one end of the optical fiber bundle comprises a plurality of ports arranged along the first direction.

6. The spectroscopic apparatus according to claim 5, wherein the optical fiber probe includes a plurality of optical lenses including a first lens, a second lens, and a filter, the light exiting direction of the first lens being opposite to the light exiting direction of the second lens, the filter being capable of filtering and refracting a first light exiting from the first lens and transmitting a second light to the second lens, the first light and the second light having different wavelengths, the first light being a light emitted from the light source generator, the second light being collected by the branching optical fiber.

7. The spectral detection apparatus according to claim 6, wherein one end of the optical fiber bundle is connected to each of the branch optical fibers and collects the second light collected by each of the branch optical fibers, a plurality of the ports are respectively in one-to-one correspondence with the branch optical fibers, and the ports are connected to the spectrometer.

8. The spectral detection device of claim 7, wherein the spectrometer comprises a first lens, a transmission grating and a second lens arranged along the direction of the optical path, the first lens collimates the second light and then emits a plurality of third light through the transmission grating, and the third light is emitted onto the light sensing element through the second lens and imaged along the second direction.

9. The spectroscopic apparatus as set forth in claim 2 wherein the light sensing member further comprises a cooling member for reducing the temperature of the light sensing member.

10. The spectroscopic detection device of claim 5 wherein each of the branch optical fibers comprises at least one optical fiber.