Spectrometer

Abstract

The invention discloses a spectrometer. The spectrometer comprises a substrate module and a housing, the housing comprises a cavity, and the substrate module is assembled in the cavity and comprises a substrate and a plurality of core optical elements mounted on the substrate. Therefore, under the condition that the substrate module is not assembled with the shell, the substrate module is located outside the shell, on one hand, the operation space is large, assembling and debugging of all the core optical elements and self-inspection of the core optical elements are facilitated, on the other hand, the assembling condition of all the core optical elements is convenient to inspect, mistaken assembling or neglected assembling can be avoided, and the assembling efficiency is improved. After the condition of wrong assembly or neglected assembly and the like is confirmed, the substrate module is arranged in the cavity, in addition, the substrate and the plurality of core optical elements are integrated into a whole, and the whole is arranged in the cavity, so that the assembly of all parts of the spectrograph is facilitated.

Description

Technical Field

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

[0002] A spectrometer is a scientific instrument used to measure the emission, transmission, reflection, or absorption spectra of samples. It converts the light emitted by a light source into interference light through an interferometer module, and then makes the interference light irradiate on the sample. The detector module captures this interference light carrying sample information, or directly converts the light carrying sample information into interference light carrying sample information through the interferometer module and then is captured by the detector module. The detector module converts the interference light signal carrying sample information into an electrical signal and performs 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 above-mentioned spectrometer generally includes a housing and multiple core optical components. The core optical components are components used to achieve core functions. For example, a fiber optic coupling interface module, a collimation module, an interferometer, a focusing module, and a detector module. During the assembly process of the above-mentioned components, there are situations of missing or misassembling components in the above-mentioned spectrometer. Summary of the Invention

[0004] The purpose of this application is to disclose a spectrometer, which is beneficial to reducing the situations of missing or misassembling core optical components.

[0005] This application discloses a spectrometer. The spectrometer includes a substrate module and a housing. The housing includes a cavity, and the substrate module is assembled in the cavity and includes a substrate and multiple core optical components mounted on the substrate.

[0006] In some embodiments, the multiple core optical components include a collimation module, an interferometer module, a focusing module, and a detector module.

[0007] In some embodiments, the cavity is separated by the substrate into a core cavity and a functional cavity. The housing includes a cover plate. The cover plate and the core cavity enclose a core chamber, and the cover plate and the functional cavity enclose a functional chamber; the core chamber and the functional chamber are physically isolated. The core chamber and the functional chamber are physically isolated; the interferometer module is included in the core chamber; the collimation module, the focusing module, and the detector module are included in the functional chamber.

[0008] In some embodiments, the spectrometer includes a bottom, and the spectrometer is placed on a tabletop through the bottom; the interferometer module is located at the bottom of the spectrometer.

[0009] In some embodiments, the core chamber is provided with a placement member for placing a desiccant.

[0010] In some embodiments, among the core chamber and the functional chamber, at least the wall thickness of the core chamber is not less than 6 mm.

[0011] In some embodiments, the plurality of core optical elements are distributed on opposite sides of the substrate.

[0012] In some embodiments, the substrate module enters and exits the cavity in a push-pull drawer manner.

[0013] In some embodiments, the housing includes a carrier table for carrying the substrate module; the spectrometer includes a substrate heat insulation member located between the carrier table and the substrate module.

[0014] In some embodiments, the housing includes a housing main body and a cover plate; the housing main body is in a through shape with opposite openings; the cover plate covers one of the openings to enclose the cavity.

[0015] In some embodiments, the housing includes a cover plate that hermetically covers the cavity to form a receiving cavity for receiving the substrate module, and the spectrometer includes a cavity wall heat insulation member that covers the cavity wall of the receiving cavity to insulate the interior and exterior of the receiving cavity.

[0016] In some embodiments, the cavity wall of the cavity includes a plurality of heat insulation member mounting grooves; there are a plurality of housing heat insulation members, and each heat insulation member mounting groove is provided with a housing heat insulation member.

[0017] For the spectrometer, since the substrate module includes a substrate and a plurality of core optical elements are mounted on it, in this way, when the substrate module is not assembled with the housing, the substrate module is located outside the housing. On the one hand, the operating space is large, which is convenient for the assembly, debugging of each core optical element and the self-inspection of the core optical elements. On the other hand, it is convenient to check the assembly situation of the core optical elements, which is beneficial to avoid misassembly or missing assembly. After confirming that there is no misassembly or missing assembly, etc., the substrate module is then installed into the cavity. In addition, after integrating the substrate and the plurality of core optical elements into a whole and installing this whole into the cavity, it is convenient for the assembly between the components of the spectrometer. Description of the Drawings

[0018] Figure 1 is an exploded view of the spectrometer of the present application, and the core optical elements are not shown schematically on the substrate;

[0019] Figure 2 is a schematic diagram of the substrate module of the present application assembled in the housing;

[0020] Figure 3 is Figure 2 an exploded view of the substrate module and the housing shown;

[0021] Figure 4 is a schematic diagram of an assembly composed of the housing and related components of the present application;

[0022] Figure 5 is a schematic diagram of the substrate module of the present application;

[0023] Figure 6 is an exploded view of the spectrometer of the present application without including the substrate module and the circuit chamber assembly. Specific Embodiments

[0024] Here, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0025] If there are terms related to directional indications or positional relationships in the embodiments of the present application (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 motion conditions between components in a certain 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, terms such as "first" and "second" 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.

[0026] See Figures 1 to 5 , the present application discloses a spectrometer. The spectrometer includes a substrate module 1 and a housing 2. Some spectrometers further include a circuit chamber assembly 9, and the circuit chamber assembly includes a circuit chamber and a circuit board located in the circuit chamber. The circuit board is connected to related optical elements on the substrate module 1 to transmit electrical signals and realize the functions of the spectrometer. In other embodiment modes, the spectrometer does not include the circuit chamber assembly 9, and related circuit boards, etc. are placed in the function chamber 202. The housing 2 includes a cavity 211, and the substrate module 1 is assembled in the cavity 211. The substrate module 1 includes a substrate 11 and a plurality of core optical elements assembled on the substrate 11. Figures 1 to 3 and Figure 5 indicate that there is only one substrate 11, Figure 1All the core optical elements shown are assembled on a substrate 11. As an alternative, there can also be two substrates 11. Some core optical elements are assembled on one substrate 11, and some other core optical elements are assembled on the other substrate 11. The core optical elements are optical elements that implement the core functions or important optical elements. Figure 2 , Figure 3 and Figure 5 Schematically show that the multiple core optical elements include a fiber optic coupling interface module 101, a collimation module 102, a coupling and turning module 103, an interferometer module 104, an output coupling and turning module 105, a focusing module 106, and a detector module 107. The fiber optic coupling interface module 101 is used to couple the detected light into the collimation module 102. In the case where the way the spectrometer obtains light is changed, the spectrometer may not include the fiber optic coupling interface module 101. For example, the spectrometer includes a light source inside. The collimation module 102 is used to collimate the light, and the outgoing light of the collimation module 102 is directed towards the interferometer module 104. The structure of the collimation module 102 is not limited as long as it can collimate the light. For example, the collimation module 102 includes a parabolic mirror. The coupling and turning module 103 is used to change the direction of the outgoing light of the collimation module 102 so that the outgoing light of the collimation module 102 is directed towards the interferometer module 104. The interferometer module 104 is not limited. For example, the interferometer module 104 includes a Michelson interferometer or a Mach–Zehnder interferometer, etc. The output coupling and turning module 105 is used to change the direction of the outgoing light of the interferometer module 104 so that the outgoing light of the interferometer module 104 finally reaches the detector module 107. In the case where it is not necessary to change the propagation direction of the light, the multiple core optical elements do not include the coupling and turning module 103 and / or the output coupling and turning module 105. In some cases, the multiple core optical elements also include a turning module located between the collimation module 102 and the coupling and turning module 103, and / or a turning module located between the focusing module 106 and the output coupling and turning module 105. The turning module is used to change the propagation direction of the light.

[0027] With the above settings, since the substrate module 1 includes the substrate 11 and multiple core optical elements are installed, in this way, when the substrate module is not assembled with the housing, the substrate module 1 is located outside the housing 2. On the one hand, there is a large operating space, which is convenient for the assembly, debugging of each core optical element and the self-inspection of the core optical elements. On the other hand, it is convenient to check the assembly situation of each core optical element, which is beneficial to avoiding misassembly or missing assembly. In addition, after integrating the substrate 11 and multiple core optical elements into a whole, loading this whole into the cavity 211 is convenient for the assembly between the components of the spectrometer.

[0028] The Figure 2 and Figure 3 with Figure 1 , Figure 4 andFigure 6 By comparison, the cavity 211 is separated by the substrate 11 into a core cavity 2111 and a functional cavity 2112. At this time, it can be considered that the housing main body 21 and the cover plate 23 enclose the cavity 211, the partition plate 22 (cover plate) and the core cavity 2111 enclose the core bin 201, and the partition plate 22 (cover plate) and the functional cavity 2112 enclose the functional bin 202. Of course, in the figure, a cover plate (partition plate 22) covers an opening of the housing main body 21 to enclose the functional bin and the core bin. In some other embodiments, two cover plates may respectively cover the upper and lower parts of the opening to enclose the core bin and the functional bin. Figures 1 to 6 The complete core bin 201 and functional bin 202 cannot be marked in the figure. Therefore, in this embodiment, the core bin 201 is marked at the component part (core cavity 2111) of the core bin 201, and the functional bin 202 is marked at the component part (functional cavity 2112) of the functional bin 202. Based on the function of the partition plate 22, the partition plate 22 can be one piece or two pieces. The partition plate 22 is actually also a cover plate, but it is named because it separates the functional bin 202 and the circuit bin. In this way, Figure 1 it can be considered that the spectrometer includes a housing main body 21 and two cover plates. The core bin 201 and the functional bin 202 are physically isolated by a sealing ring; there is no limitation on how to physically isolate. In some embodiments, the sealing ring includes a substrate sealing ring 12. The substrate sealing ring 12 is located at the edge of the substrate 11. After the substrate module 1 is assembled into the cavity 211 and the partition plate 22 is covered, the sealing effect of the substrate sealing ring 12 isolates the core bin and the functional bin. In some other embodiments, the sealing ring further includes a partition plate sealing ring 13 and a cover plate sealing ring 14. The partition plate sealing ring 13 seals between the housing main body 21 and the partition plate 22, and the cover plate sealing ring 14 seals between the housing main body 21 and the cover plate 23, thereby further sealing the cavity 211. Of course, other structures can be used to seal between the housing main body 21 and the partition plate 22 and between the housing main body 21 and the cover plate 23. The core bin 201 includes the interferometer module 104. When the spectrometer includes an input folding module 103 and an output folding module 105, the core bin 201 further includes the input folding module 103 and the output folding module 105. In short, the core bin 201 includes the more core components among the multiple core optical elements. The functional bin 202 includes the collimating module 102, the focusing module 106, and the detector module 107. When the spectrometer includes a fiber input interface module 101, the functional bin 202 further includes the fiber input interface module 101.

[0029] With the above settings, the substrate 11 divides the cavity 211 into a core cavity 2111 and a functional cavity 2112. The partition plate and the core cavity enclose a core chamber 201, and, together with the functional cavity, enclose a functional chamber 202. The core chamber 201 and the functional chamber 202 are physically isolated by a sealing ring, so that the core chamber 201 and the functional chamber 202 are non - communicating and independent chambers, which is beneficial to preventing the exchange of impurities (such as dust) between the core chamber 201 and the functional chamber 202. Thus, it is beneficial to avoid the influence of impurities on the performance of optical elements such as the interferometer module 104. Based on the role of the physical isolation between the core chamber and the functional chamber, the physical isolation is not limited to the sealing ring method, and a fitting structure, sealant, etc. can be used, as long as it is beneficial to avoid the exchange of impurities between the core chamber and the functional chamber.

[0030] See Figure 2 and Figure 3 , the spectrometer (which can be considered as the housing 2) includes a bottom 24. The spectrometer is placed on the tabletop through the bottom 24; the core chamber and the interferometer module 104 are located at the bottom 24 of the spectrometer (housing 2).

[0031] With the above settings, since the core chamber and the interferometer module 104 are located at the bottom 24 of the spectrometer (housing 2), with reference to the tabletop, components such as the interferometer module 104 (in some cases, including the coupling - in folding module 103 and the coupling - out folding module 105) are lower. In this way, components such as the interferometer module 104 are less likely to be affected by the outside and shake, etc.

[0032] See Figure 1 , Figure 4 and Figure 6 , in the spectrometer, the core chamber 201 is provided with a placement member 212 for placing a desiccant. The spectrometer also includes a mounting hole sealing ring 214 and a mounting hole flange 215. The core chamber includes a mounting hole 210. The placement member 212 passes through the mounting hole 210 and is connected to the mounting hole flange 215. The mounting hole flange 215 can be connected to the wall of the core chamber 201 in any structure. The mounting hole sealing ring 214 is located between the wall of the core chamber 201 and the mounting hole flange 215 to seal the mounting hole 210.

[0033] With the above settings, by placing a desiccant in the placement member 212, the core chamber 201 can be dried. Only the core chamber 201 is provided with a placement member 212 for placing a desiccant, compared with a spectrometer without a compartment design that dries the entire internal space of the spectrometer, and thus dries the area where the interferometer module 104 is located, the drying area is reduced, which is beneficial to reducing the manufacturing cost of the spectrometer.

[0034] In some embodiments, in the core chamber 201 and the functional chamber 202, at least the wall thickness of the core chamber 201 is not less than 6 mm. In the above embodiments, the thicknesses of the housing main body 21, the partition 22, and the cover plate 23 are each not less than 6 mm. For the entire spectrometer, the wall thicknesses of other parts can be less than 6 mm, and at least the wall thickness of the core chamber is not less than 6 mm.

[0035] With the above arrangement, since at least the wall thickness of the core chamber 201 is not less than 6 mm, the thickness of the core chamber 201 (or the thickness of the core chamber and the functional chamber) is relatively thick, which can effectively reduce the tendency of the internal temperature of the spectrometer to fluctuate with the external temperature.

[0036] See Figure 4 and Figure 5 , the multiple core optical elements are distributed on the opposite sides of the substrate 11, so as to Figure 5 For reference, the interferometer module 104, the coupling-in folding module 103, and the coupling-out folding module 105 are located on the back surface of the substrate 11, and the fiber optic coupling-in interface module 101, the collimating module 102, the focusing module 106, and the detector 108 are located on the front surface of the substrate 11.

[0037] With the above arrangement, by distributing the multiple core optical elements on the opposite sides of the substrate 11, compared with the case where the multiple core optical elements are located on the same side of the substrate 11, it is beneficial to shorten the length of the optical path, and furthermore, the volume of the spectrometer will be relatively small.

[0038] Compare Figure 2 and Figure 3 , the substrate module 1 enters and exits the cavity 211 in a push-pull manner. The directions of entry and exit are shown by the arrows R and r in Figure 3 . That is to say, the substrate module 1 can be assembled into the cavity 211 and withdrawn from the cavity 211 like a push-pull drawer. This method can be that the substrate module 1 enters and exits the cavity 211 in a sliding manner. For example, a slide rail can be provided on the carrier table described later so that the substrate module 1 can enter and exit the cavity 211 in a sliding manner, or a chute can be provided on the inner wall of the cavity 211, and the edge of the substrate 11 slides in the chute so that the substrate module 1 enters and exits the cavity 211. In some other ways, the substrate module 1 can also be in direct contact with the carrier table 213 to push the substrate module 1 into and out of the cavity 211.

[0039] With the above arrangement, since the substrate module 1 enters and exits the cavity 211 in a push-pull drawer manner, it is more convenient for the substrate module 1 to be assembled and debugged with the housing 2.

[0040] See Figures 2 to 4, the housing 2 includes a carrier table 213 for carrying the substrate module 1. The housing body 21 is shown in the figure to be provided with the carrier table 213. In some embodiments, the partition 22 and the cover plate 23 may also be provided with the carrier table 213. The spectrometer includes a substrate heat insulator 3, and the substrate heat insulator 3 is located between the carrier table 213 and the substrate module 1.

[0041] There are two paths for the heat of the housing 2 to be transferred to the optical elements on the substrate 11. One path is through the air in the cavity 211, and the other is through the contact between the substrate 11 and the housing 2 (such as the contact with the carrier table 213 as described above). With the above settings, since the substrate heat insulator 3 is located between the carrier table 213 and the substrate module 1, the heat insulation effect of the substrate heat insulator 3 is beneficial to reducing the heat transfer of the housing 2 to the substrate 11, and the heat transfer from the air in the housing 2 to the substrate module 1 is slow. Eventually, it is beneficial to reduce the heat transfer of the housing 2 to the optical elements (or the substrate module 1) on the substrate 11, which is beneficial to avoiding the performance degradation of the optical elements due to overheating and meeting the requirements of the optical elements for thermal stability.

[0042] See Figure 1 and Figure 4 , the housing 2 includes a housing body 21, a partition 22, and a cover plate 23. The housing body 21 is in a through shape and includes opposite openings. The partition 22 is also a cover plate, but it is named because it separates the housing 2 from the circuit compartment 9. The cover plate 23 covers one of the openings to enclose the cavity 211. In one way, as shown in the figure, the cover plate 23 and the housing body 21 are independent of each other and are assembled to achieve the covering and enclose the cavity 211. In some other embodiments, the cover plate 23 and the housing body 21 are integrally formed to achieve the covering and enclose the cavity 211. The partition 22 covers the other opening. In some embodiments, the cover plate 23 and the partition 22 are hermetically connected to the housing body 21. There is no limitation on how to achieve the hermetic connection. As described above, the hermetic connection is achieved through the partition seal ring 13 and the cover plate seal ring 14 respectively. In addition, Figure 1 It is shown that the partition 22 is also provided with two partition connection windows 221. Each partition connection window 221 is provided with a plug-in connector 222 and a partition gasket 223, and the electrical signal transmission between the components in the functional compartment and the circuit board in the circuit compartment is realized through the plug-in connector. The connection window 221 is sealed through the gasket. In addition, the spectrometer further includes an optical fiber flange 25. The cover plate 23 includes a cover plate connection window 230. The optical fiber flange 25 and the cover plate 23 are sealed through the cover plate seal ring 231. The optical fiber flange 25 and the coupled optical fiber interface module 104 are inserted into each other, and the optical fiber interface 1041 of the coupled optical fiber interface module 104 is inserted into the optical fiber flange 25 and is sealed through two interface gaskets 232.

[0043] With the above settings, the housing includes a housing main body 21 and a cover plate 23. The cover plate 23 and the housing main body 21 enclose the cavity 211. In this way, the structure of the cavity 211 is simple. Also, since the housing main body 21 is in a through shape, the substrate module 1 can be assembled from both openings, and the assembly of the substrate module 1 and the housing 2 is convenient.

[0044] See Figure 4 , the housing 2 includes a partition plate 22 (which is also a cover plate, but in this application, there is also an independent circuit chamber, so for the sake of distinction, it is called the partition plate 22). The partition plate 22 (cover plate) hermetically covers the cavity 211 to form a receiving cavity for receiving the substrate module 1. The spectrometer includes a cavity wall heat insulation member 4. The cavity wall heat insulation member 4 covers the cavity wall of the receiving cavity to insulate the inside and the outside of the receiving cavity. That is, the cavity wall heat insulation member 4 covers at least one of the housing main body 21, the partition plate 22, and the cover plate 23 at a preset position. The material of the housing heat insulation member 4 is not limited. For example, it can be heat-insulating cotton.

[0045] With the above settings, by using the cavity wall heat insulation member 4 to insulate the inside and the outside of the receiving cavity, it is beneficial to prevent the heat outside the spectrometer from being transferred into the receiving cavity, and effectively reduce the tendency of the internal temperature of the spectrometer to fluctuate with the external temperature. Based on the above functions of the cavity wall heat insulation member 4, the cavity wall heat insulation member 4 can cover the entire inner wall or a part of the inner wall of the receiving cavity. The covered part is not limited as long as it can play the above heat insulation role.

[0046] See Figure 6 , the housing 2 includes a heat insulation member installation groove 220. The heat insulation member installation groove 220 is shown on the partition plate 22, but is not limited to the partition plate 22, and can also be on the housing main body 21 and the cover plate 23. There are multiple cavity wall heat insulation members 4, and each cavity wall heat insulation member 4 is arranged in each heat insulation member installation groove 220.

[0047] With the above settings, since the heat insulation member installation groove 220 is provided with the cavity wall heat insulation member 4 and is arranged on the cavity wall, in this way, on the premise of ensuring the heat insulation of the spectrometer, by providing the heat insulation member installation groove 220, it is beneficial to reduce the weight of the spectrometer.

[0048] 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 substrate module and a housing. The housing includes a cavity, and the substrate module is assembled in the cavity and includes a substrate and a plurality of core optical elements mounted on the substrate.

2. The spectrometer according to claim 1, wherein The plurality of core optical elements include a collimation module, an interferometer module, a focusing module, and a detector module.

3. The spectrometer according to claim 2, wherein The cavity is separated by the substrate into a core cavity and a functional cavity; the housing includes a cover plate. The cover plate and the core cavity enclose a core chamber, and the cover plate and the functional cavity enclose a functional chamber. The core chamber and the functional chamber are physically isolated; the interferometer module is included in the core chamber; the collimation module, the focusing module, and the detector module are included in the functional chamber.

4. The spectrometer according to claim 2, wherein, The spectrometer includes a bottom, and the spectrometer is placed on a tabletop through the bottom; the interferometer module is located at the bottom of the spectrometer. And / or, the core chamber is provided with a placement member for placing a desiccant.

5. The spectrometer according to claim 3, wherein Among the core chamber and the functional chamber, at least the wall thickness of the core chamber is not less than 6 mm.

6. The spectrometer according to claim 1, characterized in that, The plurality of core optical elements are distributed on opposite sides of the substrate. And / or, the substrate module enters and exits the cavity in a push-pull drawer manner.

7. The spectrometer according to claim 1, characterized in that, The housing includes a carrier for carrying the substrate module; the spectrometer includes a substrate heat insulator, and the substrate heat insulator is located between the carrier and the substrate module.

8. The spectrometer according to claim 1, characterized in that, The housing includes a housing body and a cover plate; the housing body is in a through shape and has opposite openings; the cover plate covers one of the openings to enclose the cavity.

9. The spectrometer according to claim 1, wherein The housing includes a cover plate, and the cover plate hermetically covers the cavity to form a receiving cavity for receiving the substrate module. The spectrometer includes a cavity wall heat insulator, and the cavity wall heat insulator covers the cavity wall of the receiving cavity to insulate the interior and the exterior of the receiving cavity.

10. The spectrometer according to claim 9, characterized in that, The cavity wall of the cavity includes a plurality of heat insulator mounting grooves; there are a plurality of cavity wall heat insulators, and each heat insulator mounting groove is provided with a cavity wall heat insulator.

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