Spectrometer

Abstract

The invention discloses a spectrometer. The spectrometer comprises a shell, an interferometer, a detector, a front light path element outside a cabin and a rear light path element outside the cabin. The shell is divided into a core bin and a non-core bin which are independent from each other, the interferometer is located in the core bin, and the interior of the core bin is communicated with the exterior of the core bin only through the optical window. The out-of-bin front light path element, the out-of-bin rear light path element and the detector are located in the non-core bin; light from the light source is emitted to the out-of-bin front light path element, emergent light of the out-of-bin front light path element is emitted to the interferometer from the corresponding optical window, and emergent light of the interferometer is emitted to the detector through the corresponding optical window and the out-of-bin rear light path element. Therefore, the interferometer and other core elements are located in the core bin and are not prone to being interfered by the external environment, the use scene of the spectrograph is not prone to being limited, and the performance of the spectrograph is not prone to being obviously reduced.

Description

Technical Field

[0001] This application relates to detection equipment, and in particular to spectrometers. Background Art

[0002] A spectrometer, for example, a Fourier Transform Infrared (FTIR) spectrometer, is a scientific instrument used to measure the emission, transmission, reflection, or absorption spectrum of a sample. It converts the light emitted by a light source into interference light through an interferometer component, then irradiates the interference light onto the sample, and a detector captures this interference light carrying sample information, or directly converts the light carrying sample information into interference light carrying sample information through the interferometer component and then is captured by the detector. The detector converts the interference light signal carrying sample information into an electrical signal and performs a Fourier transform via computer software to finally generate a spectrogram. Such an instrument is widely used in fields such as chemistry, materials science, and biomedicine to achieve functions such as detecting and analyzing molecular structures, compound compositions, and biomolecules.

[0003] The core component of a spectrometer is the interferometer in the interferometer component. An interferometer is a precision measuring instrument made based on the principle of light interference. By splitting, modulating, and combining light to form interference light, it can precisely measure lengths and minute changes in lengths, etc., and has a wide range of applications in modern science and technology; common interferometers include Michelson interferometers and Mach-Zehnder interferometers, etc. The core components of an interferometer usually include a beam splitter, a fixed mirror, and a moving mirror, etc. The beam splitter divides the incident near-infrared light into two beams, one beam is reflected to the fixed mirror, and the other beam is transmitted to the moving mirror; the fixed mirror is used to provide a fixed mirror optical path with a fixed length as a reference optical path; the moving mirror moves along the optical axis direction or swings perpendicular to the optical axis direction through precise mechanical drive (such as a precision motor or piezoelectric ceramics, etc.), changing the optical path of the moving mirror optical path.

[0004] However, the interferometer of the existing spectrometer, as the core component, is easily interfered by the external environment. Summary of the Invention

[0005] The purpose of this application is to disclose a spectrometer, and the interferometer of the spectrometer is not easily interfered by the external environment.

[0006] The present application discloses a spectrometer. The spectrometer includes a housing, an interferometer, a detector, an external front optical path element, and an external rear optical path element. The housing is partitioned into an independent core chamber and a non-core chamber. The interferometer is located in the core chamber, and the interior of the core chamber communicates with the exterior of the core chamber only through an optical window. The external front optical path element, the external rear optical path element, and the detector are located in the non-core chamber; light from a light source is incident on the external front optical path element, and the outgoing light of the external front optical path element is incident on the interferometer through the corresponding optical window. The outgoing light of the interferometer is incident on the detector through the corresponding optical window and the external rear optical path element.

[0007] In some embodiments, the non-core chamber is partitioned into an independent functional chamber and a circuit chamber; the light source, the external front optical path element, the external rear optical path element, and the detector are located in the functional chamber. All circuit boards of the spectrometer are located in the circuit chamber.

[0008] In some embodiments, the non-core chamber is partitioned into an independent functional chamber and a circuit chamber; the external front optical path element, the external rear optical path element, and the detector are located in the functional chamber; all circuit boards of the spectrometer include circuit boards located in the functional chamber and circuit boards located in the circuit chamber; or, all circuit boards of the spectrometer include circuit boards located in the core chamber and circuit boards located in the circuit chamber; or, all circuit boards of the spectrometer include circuit boards located in the core chamber, circuit boards located in the functional chamber, and circuit boards located in the circuit chamber.

[0009] In some embodiments, the sealing level of the functional chamber is equal to or lower than that of the core chamber, and the sealing level of the circuit chamber is lower than that of the functional chamber.

[0010] In some embodiments, when the sealing level of the functional chamber is lower than that of the core chamber, each optical window is hermetically provided with a window pane to physically isolate the core chamber and the functional chamber; or, when the sealing levels of the core chamber and the functional chamber are equal, the core chamber and the functional chamber communicate through the optical window.

[0011] In some embodiments, the chamber wall of the functional chamber includes a common wall and a non-common wall, and the common wall is also the chamber wall of the core chamber; the spectrometer includes an external optical interface, and the external optical interface is provided on the non-common wall.

[0012] In some embodiments, the wall of the circuit compartment includes a common wall and a non-common wall. The common wall is also the wall of the core compartment. The spectrometer includes an external electrical interface, and the external electrical interface is disposed on the non-common wall.

[0013] In some embodiments, the housing includes a bottom, and the spectrometer is placed on a tabletop through the bottom. The core compartment and the interferometer are located at the bottom of the housing.

[0014] In some embodiments, the functional compartment and the core compartment are stacked to form a combined compartment. The circuit compartment is located at the side of the combined compartment; alternatively, the circuit compartment is stacked with the combined compartment.

[0015] In some embodiments, the circuit compartment is physically isolated from the core compartment and the functional compartment.

[0016] In some embodiments, a plurality of docking connectors are provided on the wall of the core compartment. The circuit board in the circuit compartment is connected to the corresponding components in the core compartment and the corresponding components in the functional compartment through the corresponding docking connectors.

[0017] In some embodiments, a placement member for placing a desiccant is provided in the core compartment.

[0018] In some embodiments, the core compartment includes only one front folding mirror and one rear folding mirror. The front folding mirror reflects the light from the optical window to the interferometer. The rear folding mirror reflects the outgoing light of the interferometer so that the outgoing light of the interferometer exits the corresponding optical window.

[0019] For the spectrometer, the spectrometer adopts a compartmentalized design and includes an independent core compartment and a non-core compartment. At least the interferometer is located in the core compartment, and other components are located in the non-core compartment. In this way, core components such as the interferometer are not easily interfered by the external environment. These interferences include environmental vibration, external noise, air flow disturbance, temperature fluctuation, etc. These interferences will limit the actual application scenarios of the spectrometer. Especially for industrial scenarios with harsh environments, due to the interference of the external environment on the interferometer, the performance of the spectrometer (such as spectral signal-to-noise ratio, wavenumber repeatability, wavenumber accuracy, etc.) will be significantly degraded. However, the core components of the spectrometer in the present application are not easily interfered by the external environment. Therefore, the actual application scenarios of the spectrometer are not limited, and the performance of the spectrometer is not easily significantly degraded. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the compartmentalized design of the spectrometer of the present application;

[0021] Figure 2 is a perspective view of the spectrometer of the present application;

[0022] Figure 3 is Figure 2 the exploded view of the spectrometer shown;

[0023] Figure 4 is a schematic diagram of the spectrometer of the present application with part of the housing removed to show the distribution of components such as the interferometer inside the housing;

[0024] Figure 5 is Figure 3 the front view of Detailed Embodiment

[0025] Here, in conjunction with the accompanying drawings, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.

[0026] If there are terms in the embodiments of the present application that involve directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0027] See Figures 1 to 5, this application discloses a spectrometer. The spectrometer includes a Fourier transform near-infrared / mid-infrared / far-infrared / terahertz experimental spectrometer, a Fourier transform near-infrared process analyzer, a Fourier transform gas composition analyzer, a Fourier transform infrared vehicle-mounted spectrometer, a Fourier transform infrared microspectrometer, and other equipment related to Fourier transform infrared spectrometers. The spectrometer includes a housing 1, an interferometer 2, a detector 3, an external front optical path element 4, and an external rear optical path element 5. The interferometer 2 is usually a Michelson interferometer, and the Michelson interferometer can be selected from a plane mirror type with a translating moving mirror, a corner mirror type with a translating moving mirror, a corner mirror type with a rotating moving mirror, and a plane mirror type with a rotating moving mirror, etc. For the plane mirror type with a translating moving mirror Michelson interferometer, it includes a beam splitter, at least one fixed plane mirror, and at least one moving plane mirror; wherein, at least one moving plane mirror can translate along the optical axis direction. For the corner mirror type with a translating moving mirror Michelson interferometer, it includes a beam splitter, at least one fixed hollow retroreflective corner mirror, and at least one moving hollow retroreflective corner mirror; wherein, at least one moving hollow retroreflective corner mirror can translate along the optical axis direction. For the corner mirror type with a rotating moving mirror Michelson interferometer, it includes a beam splitter, at least two hollow retroreflective corner mirrors that are mirror-symmetrical with respect to the plane where the beam splitter is located, and optionally several plane mirrors; wherein, the two hollow retroreflective corner mirrors that are mirror-symmetrical with respect to the plane where the beam splitter is located can rotate with respect to the midpoint of their connection line. For the plane mirror type with a rotating moving mirror Michelson interferometer, it includes a beam splitter, at least a pair of plane mirror groups that are always parallel and can rotate as a whole, and optionally several fixed plane mirrors. In addition, the interferometer can also use a Mach–Zehnder interferometer, which includes two beam splitters and at least two plane mirrors; wherein, at least one plane mirror can translate along the optical axis direction. The external front optical path element 4, with the core chamber as a reference, is located outside the core chamber and is some optical elements that incident the light from the light source into the interferometer 2 inside the core chamber. For example, the external front optical path element includes a collimator 41 and a folding mirror. The collimator 41 is used to collimate the light from the light source, and the folding mirror turns the outgoing light of the collimator and then shoots it towards the interferometer 2. The collimator 41 can be a parabolic mirror, such as an off-axis parabolic mirror. In some scenarios where it is not necessary to change the light propagation direction, the external front optical path element 4 does not include a folding mirror, or, in cases where it is necessary to change the light propagation direction, due to reasons such as the cost and volume of the spectrometer, the external front optical path element 4 can only include one folding mirror. The "light from the light source" includes the following situations: a) The light source is located inside the spectrometer (for example, inside the function chamber described later), the light source is such as an infrared light source, etc., and the number of light sources is not limited; b) The light source is located outside the spectrometer, and the light source outside the spectrometer is input into the spectrometer through an external optical interface.

[0028] The post-optical path components 5 outside the cabin include some optical components located outside the core cabin and directing the outgoing light of the interferometer 2 towards the detector 3. For example, the post-optical path components 5 outside the cabin include a focusing mirror 51 and a folding mirror. The folding mirror deflects the outgoing light of the interferometer 2. The number of folding mirrors in the post-optical path components 5 outside the cabin is not limited either. In some scenarios where it is not necessary to change the direction of light propagation, the post-optical path components 5 outside the cabin do not include a folding mirror. Or, in cases where it is necessary to change the direction of light propagation, due to reasons such as the cost, stability, and volume of the spectrometer, the post-optical path components 5 outside the cabin can include only one folding mirror. The focusing mirror 51 focuses the deflected light, and the outgoing light of the focusing mirror 51 is directed towards the detector 3. The type of the detector 3 is not limited. For example, the detector 3 is an infrared detector.

[0029] The housing 1 is preferably made of a metal material, or other materials with metal properties can also be used. In this way, it is possible to better avoid interference from the external environment. For example, the influence of external vibrations on the components inside the housing 1. The structure of the housing 1 is not limited, and it is used to accommodate components such as the interferometer 2, the pre-optical path components 4 outside the cabin, the post-optical path components 5 outside the cabin, and the circuit board. For example, Figures 2 to 4 It is shown that the housing 1 includes a first housing 101, a second housing 102, a first partition 103, and a second partition 104. The first partition 103 divides the first housing 101, and the second partition 104 divides the first housing 101 and the second housing 102. In this way, the first partition 103, the second partition 104, and the first housing 101 correspondingly enclose independent core cabins 11 and functional cabins 12, and the second partition 104 and the second housing 102 enclose a circuit cabin 13. To more intuitively see the core cabin 11, the functional cabin 12, and the circuit cabin 13, they are marked on Figure 2 and Figure 3 the outside of the housing 1. Based on the technical concept of the spectrometer of the present application adopting a split-cabin design, and the core components such as the interferometer 2 or the interferometer 2 being located in an independent cabin (core cabin), in some embodiments, the circuit cabin 13 and the functional cabin 12 can be combined into one cabin. The functional cabin 12 can also be divided into two cabins according to the incoming light to the interferometer 2 and the outgoing light from the interferometer 2 to the detector 3. In short, the housing 1 of the present application includes at least two independent cabins.

[0030] In the present application, the housing is divided into independent core cabins 11 and non-core cabins (such as the aforementioned functional cabins 12 and circuit cabins 13). The core cabin 11 is used to accommodate core components (at least including the interferometer 2). See Figure 1 、 Figures 3 to 5, inside the core module 11, in addition to the interferometer 2, there are also a front folding mirror 21 and a rear folding mirror 22. The front folding mirror 21 deflects the incident light towards the input end of the interferometer 2 (that is, reflects the light from one of the optical windows 111 to the interferometer 2). The rear folding mirror 22 deflects the outgoing light of the interferometer 2 in a specific direction (that is, the rear folding mirror 22 emits the outgoing light of the interferometer 2 from the other optical window 111). If the incident light directed towards the interferometer 2 does not need to be deflected, the front folding mirror 21 does not need to be provided inside the core module 11. If the outgoing light of the interferometer 2 does not need to be deflected, the rear folding mirror 22 does not need to be provided inside the core module 11. Of course, the number of the front folding mirror 21 and the number of the rear folding mirror 22 are not limited. Considering factors such as cost, stability, and volume, there may be no folding mirrors inside the core module 11, or there may be only one front folding mirror 21 and one rear folding mirror 22 inside the core module 11 (that is, at most two folding mirrors). The non-core module houses other components except for the core components. The core and non-core are relative. There is at least one non-core module. For example, the external front optical path component 4, the external rear optical path component 5, the detector 3, etc. are located inside the non-core module.

[0031] The interior of the core module 11 is only connected to the outside of the core module 11 through the optical window 111. The outside here is not limited to the non-core module. The connection means that except for the incoming and outgoing light, other parts are not connected to the outside world. The number of optical windows is not limited. See Figure 1 , there are two optical windows 111. One optical window 111 allows the light from the external front optical path component 4 to enter the core module 11. Finally, the light is directed towards the interferometer 2. The other optical window 111 allows the outgoing light of the interferometer 2 to be emitted to the external rear optical path component 5 and then incident on the detector 3. In some cases, there can also be only one optical window, as long as the light can be directed towards the interferometer 2 and the outgoing light of the interferometer 2 can be emitted.

[0032] With the above settings, the spectrometer adopts a split-module design and includes an independent core module 11 and non-core module. At least the interferometer 2 is located inside the core module 11, and other components are located inside the non-core module. In this way, at least the interferometer 2 is not easily affected by the external environment. These interferences include environmental vibration, external noise, air flow disturbance, temperature fluctuation, etc. These interferences will limit the actual application scenarios of the spectrometer. Especially for industrial scenarios with harsh environments, due to the interferometer being affected by the external environment, the performance of the spectrometer (such as spectral signal-to-noise ratio, wavenumber repeatability, wavenumber accuracy, etc.) will be significantly reduced. However, the core components of the spectrometer in this application are not easily affected by the external environment. Therefore, the actual application scenarios of the spectrometer are not limited, and the performance of the spectrometer is not easily significantly reduced.

[0033] See Figure 1 , Figure 3 and Figure 4 , the non-core chamber is partitioned into an independent functional chamber 12 and a circuit chamber 13. The front optical path element 4 outside the chamber, the rear optical path element 5 outside the chamber, and the detector 3 are located in the functional chamber 12. Of course, the functional chamber 12 is not limited to the foregoing elements and also includes other elements (such as the circuit board for controlling the detector 3, etc.). One or more light sources can be installed in the functional chamber 12, and the light source can be an infrared light source. In some scenarios, the sample (the object to be measured or the object under test) can be located outside the spectrometer and does not participate in the refraction of the optical path inside the spectrometer. In this way, the test of the sample by the spectrometer is not limited by the position of the sample. Because in some scenarios, the sample participates in the refraction of the optical path of the optical path components and must be located between two plane mirrors, the position of the sample is limited. In some cases, the functional chamber 12 also houses a mounting component for mounting the sample to be measured. All the circuit boards 6 of the spectrometer are located in the circuit chamber 13. Or, all the circuit boards of the spectrometer include the following situations: a) There can be a small number of necessary circuit boards in the functional chamber 12, such as the circuit board for controlling the detector 3, etc., and the other circuit boards of the spectrometer are located in the circuit chamber 13; b) There are a small number of necessary circuit boards in the core chamber 11, such as the circuit board for controlling the interferometer 2, the control circuit board for controlling the laser diode, the laser detector circuit, and possibly the motion control circuit (for controlling the rotation of the interferometer, etc.); the other circuit boards of the spectrometer are located in the circuit chamber 13; c) Each of the functional chamber 12 and the core chamber 11 includes a small number of necessary circuit boards, and the other circuit boards are located in the circuit chamber 13.

[0034] With the above settings, since the spectrometer includes a core chamber 11, a functional chamber 12, and a circuit chamber 13, and the circuit chamber 13 houses at least part of the circuit boards, adopting a distributed layout is beneficial to modularization and facilitates the layout and maintenance of components, etc. For example, the core chamber 11 includes the interferometer 2 and the necessary circuit boards. Moreover, since the core chamber 11, the functional chamber 12, and the circuit chamber 13 are independent of each other, if the components in the core chamber 11 need to be repaired or adjusted, it will not affect other components, which is convenient for maintenance. The same principle applies to the components in the functional chamber 12 and the circuit chamber 13.

[0035] In some embodiments, the sealing level (such as the waterproof and dustproof level) of the functional compartment 12 is equal to or lower than that of the core compartment 11, and the sealing level of the circuit compartment 13 is lower than that of the functional compartment 12. That is to say, the core compartment 11 has the highest sealing level. For example, it reaches a sealing level (waterproof and dustproof level) above IP45. The sealing level of the circuit compartment 13 is lower than that of the functional compartment 12, including: a) The circuit compartment 13 has a sealing level, but the sealing level is lower than that of the functional compartment 12; b) The circuit compartment 13 does not have a sealing level, that is, there is no requirement for waterproof and dustproof, and not having a sealing level naturally means it is lower than that of the functional compartment 12.

[0036] With the above settings, the relationship between the above sealing levels, combined with the compartment design and at least part of the circuit boards being located in the circuit compartment 13 (the above three cases of a, b, c and all the circuit boards being located in the circuit compartment can be summarized as at least part of the circuit boards being located in the circuit compartment 13), through the combination of high and low sealing levels, can reduce the design volume of the high sealing level, which is beneficial to reducing the manufacturing cost of the spectrometer.

[0037] When the sealing level of the functional compartment 12 is lower than that of the core compartment 11, each optical window 111 is hermetically provided with a window pane (not marked in the figure). Through the window pane, the core compartment 11 and the functional compartment 12 are physically isolated.

[0038] With the above settings, by physically isolating the core compartment 11 and the functional compartment 12 through the window pane, the functional compartment 12 can adopt a lower sealing level. In this way, the design volume of the high sealing level is further reduced, which is more beneficial to reducing the manufacturing cost of the spectrometer. Moreover, after the window pane is set, the core compartment 11 is a completely enclosed cavity and is less likely to be interfered by the external environment.

[0039] Of course, when the sealing levels of the core compartment 11 and the functional compartment are equal, since both the core compartment 11 and the functional compartment 12 are sealed, the window pane may not be provided. In this way, the core compartment 11 and the functional compartment 12 communicate through the optical window 111.

[0040] See Figures 1 to 5, the wall of the function chamber 12 includes a common wall 121 and a non-common wall 122, and the common wall 121 is also the wall of the core chamber 11. In some embodiments, the function chamber 12 and the core chamber 11 may not have a common wall and are separate. The spectrometer includes an external optical interface 123, and the external optical interface 123 is disposed on the non-common wall 122. The external optical interface 123 is used to externally connect an optical structure with a specific function to output the light inside the spectrometer (such as infrared light) to the outside of the spectrometer and / or input the external light to be detected (such as infrared light) into the inside of the spectrometer. When there is one external optical interface 123, the external optical interface 123 can be connected to a fiber optic flange; when there are two external optical interfaces 123, the external optical interfaces 123 can be connected to a fiber optic flange, an attenuated total reflection (ATR) detection accessory, an integrating sphere detection accessory, a gas cell, etc. The number of external optical interfaces 123 is not limited to one.

[0041] With the above settings, by setting the external optical interface 123, the versatility of the spectrometer is improved. Moreover, since the function chamber 12 is independent of the core chamber 11 and the external optical interface 123 is disposed on the non-common wall 122, when using the external optical interface 123, core components such as the interferometer will not be exposed to the user's operation space. When the user operates at the external optical interface 123, there is no risk of touching the interferometer 2 and causing it to be out of adjustment. Furthermore, it will not cause the performance decline or even function loss of the spectrometer.

[0042] See Figure 1 , the wall of the circuit chamber 13 includes a common wall 131 and a non-common wall 132. The common wall 131 is also the wall of the core chamber 11. In some embodiments, the circuit chamber 13 and the core chamber 11 may not have a common wall and are separate. The spectrometer includes an external electrical interface 133. The external electrical interface 133 is disposed on the non-common wall 132. The external electrical interface 133 is used to provide an indicator light, a communication interface, a power supply interface, etc. for interacting with the user. The number of external electrical interfaces 133 is not limited to one.

[0043] With the above settings, by setting the external electrical interface 133, the versatility of the spectrometer is improved. Moreover, since the circuit chamber 13 is independent of the core chamber 11 and the external electrical interface 133 is disposed on the non-common wall 132, when using the external electrical interface 133, core components such as the interferometer 2 will not be exposed to the user's operation space. When the user operates at the external electrical interface 133, there is no risk of touching the interferometer 2 and causing it to be out of adjustment. Furthermore, it will not cause the performance decline or even function loss of the spectrometer.

[0044] See Figure 4 and in combination with Figure 3, the housing 1 includes a bottom 16, and the spectrometer is placed on a tabletop through the bottom 16; the core chamber 11 and the interferometer 2 are located at the bottom 16 of the housing.

[0045] With the above arrangement, since the core chamber 11 and the interferometer 2 are located at the bottom 16 of the housing 1, with the tabletop as a reference, core components such as the interferometer 2 are lower, and in this way, core components such as the interferometer 2 are less likely to be affected by the outside world and shake, etc.

[0046] See Figures 3 to 5 , the function chamber 12 and the core chamber 11 are stacked to form a combined chamber; the circuit chamber 13 is located at the side of the combined chamber. As another implementation manner, the circuit chamber 13 is stacked with the combined chamber, that is, the circuit chamber 13, the function chamber 12, and the core chamber 11 are stacked, and the stacking order is not limited.

[0047] With the above arrangement, through the above stacking arrangement, it is easier to place core components such as the core chamber 11 and the interferometer 2 at the bottom of the housing 1. In the case where the function chamber 12 and the core chamber 11 are stacked to form a combined chamber and the circuit chamber 13 is located at the side of the combined chamber, a drawer method can be adopted. For example, the aforementioned external chamber front optical path element 4, interferometer 2, detector 3, and external chamber rear optical path element 5, etc. are assembled on the first partition 103 and the second partition 104 to form an integral body, and this integral body is inserted into the housing 1 like closing a drawer, so as to facilitate the assembly of the spectrometer.

[0048] In some implementation manners, the circuit chamber 13 is physically isolated from the core chamber 11 and the function chamber 12.

[0049] With the above arrangement, through the physical isolation, it is easier to achieve the respective sealing levels of the core chamber 11, the function chamber 12, and the circuit chamber 13.

[0050] See Figure 1 , a plurality of docking connectors 112 are provided on the wall of the core chamber 11. The docking connector 112 is, for example, a docking circuit board. The circuit board in the circuit chamber 13 is connected to the corresponding components in the core chamber 11 and the corresponding components in the function chamber 12 through the corresponding docking connectors 112. In Figure 1 , the docking connector 112 realizes the electrical signal access of the circuit board placed in the function chamber 12 to the core chamber 11, and then the signal is accessed to the circuit board in the circuit chamber 13 through the docking connector 112 on the other side. The circuit board in the core chamber 11 is connected to the circuit board 6 in the circuit chamber 13 through the corresponding docking connector 112. Figure 1It shows the transmission of electrical signals between the core bin 11 and the circuit bin 13 and / or the transmission of electrical signals between the components in the circuit bin 13 through the plug-in connectors of the core bin 11 for the functional bin 12. In Figure 1 In it, the functional bin 12 and the circuit bin 13 do not have a common side wall. As another implementation manner, the functional bin 12 and the circuit bin 13 have a common side wall. At this time, the circuit board in the circuit bin 13 is connected to the corresponding components in the core bin 11 and the corresponding components (including the circuit board) in the functional bin 12 through the corresponding plug-in connectors 112. It further includes: at least one plug-in connector is arranged on the common side wall (common wall or public wall) of the functional bin 12 and the circuit bin 13, and the transmission of electrical signals between the components in the functional bin 12 and the circuit board in the circuit bin 13 is realized through this docking connector.

[0051] With the above settings, through the plug-in connectors 112, not only can the transmission of electrical signals between the functional bin 12, the core bin 11 and the circuit bin 13 be realized, but also the plug-in connectors 112 are easily connected to their respective bin walls in a sealed manner, and it is easy to achieve their respective sealing grades.

[0052] See Figure 3 and Figure 5 , a placement member 113 for placing desiccant is arranged in the core bin 11.

[0053] With the above settings, the core bin 11 can be dried by placing desiccant on the placement member 113. Only the core bin 11 is provided with the placement member 113 for placing desiccant, and there is no separate bin design from the spectrometer, and the entire internal space of the spectrometer is dried. Thus, compared with drying the area where the interferometer 2 is located, the dried area is reduced, which is beneficial to reducing the manufacturing cost of the spectrometer.

[0054] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A spectrometer, characterized in that, The spectrometer includes a housing, an interferometer, a detector, an external front optical path element, and an external rear optical path element; The housing is partitioned into an independent core chamber and a non-core chamber. The interferometer is located in the core chamber, and the interior of the core chamber communicates with the exterior of the core chamber only through an optical window; The external front optical path element, the external rear optical path element, and the detector are located in the non-core chamber; light from a light source is incident on the external front optical path element, and the outgoing light of the external front optical path element enters the interferometer through the corresponding optical window. The outgoing light of the interferometer enters the detector through the corresponding optical window and the external rear optical path element.

2. The spectrometer according to claim 1, characterized in that, The non-core chamber is partitioned into an independent functional chamber and a circuit chamber; the external front optical path element, the external rear optical path element, and the detector are located in the functional chamber; All circuit boards of the spectrometer are located in the circuit chamber.

3. The spectrometer according to claim 1, wherein The non-core chamber is partitioned into an independent functional chamber and a circuit chamber; the external front optical path element, the external rear optical path element, and the detector are located in the functional chamber; All circuit boards of the spectrometer include circuit boards located in the functional chamber and circuit boards located in the circuit chamber; Alternatively, all circuit boards of the spectrometer include circuit boards located in the core chamber and circuit boards located in the circuit chamber; Alternatively, all circuit boards of the spectrometer include circuit boards located in the core chamber, circuit boards located in the functional chamber, and circuit boards located in the circuit chamber.

4. The spectrometer according to claim 2 or 3, characterized in that, The sealing level of the functional chamber is equal to or lower than that of the core chamber, and the sealing level of the circuit chamber is lower than that of the functional chamber.

5. The spectrometer according to claim 4, characterized in that, When the sealing level of the functional chamber is lower than that of the core chamber, each optical window is hermetically provided with a window pane to physically isolate the core chamber and the functional chamber; Alternatively, when the sealing levels of the core chamber and the functional chamber are equal, the core chamber and the functional chamber communicate through the optical window.

6. The spectrometer according to claim 2, characterized in that, The chamber wall of the functional chamber includes a common wall and a non-common wall. The common wall is also the chamber wall of the core chamber; the spectrometer includes an external optical interface, and the external optical interface is provided on the non-common wall; And / or, the chamber wall of the circuit chamber includes a common wall and a non-common wall. The common wall is also the chamber wall of the core chamber. The spectrometer includes an external electrical interface; the external electrical interface is provided on the non-common wall.

7. The spectrometer according to claim 2, wherein The housing includes a bottom, and the spectrometer is placed on a tabletop through the bottom; the core chamber and the interferometer are located at the bottom of the housing.

8. The spectrometer according to claim 6, wherein The functional chamber and the core chamber are stacked to form a combined chamber; the circuit chamber is located on the side of the combined chamber; alternatively, the circuit chamber is stacked with the combined chamber.

9. The spectrometer according to claim 2, characterized in that, The circuit chamber is physically isolated from the core chamber and the functional chamber.

10. The spectrometer according to claim 8, characterized in that, A plurality of docking connectors are provided on the chamber wall of the core chamber; The circuit boards in the circuit chamber are connected to the corresponding components in the core chamber and the corresponding components in the functional chamber through the corresponding docking connectors.

11. The spectrometer according to claim 1, characterized in that, A placement member for placing a desiccant is provided inside the core bin.

12. The spectrometer according to claim 1, characterized in that, The core bin only includes a front folding mirror and a rear folding mirror; the front folding mirror reflects light from the optical window to the interferometer; the rear folding mirror reflects the outgoing light of the interferometer so that the outgoing light of the interferometer exits the corresponding optical window.

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