Adjustable slit device for spectrometer

Abstract

The present application discloses an adjustable slit device for a spectrometer, which belongs to the technical field of optical analysis instruments. The adjustable slit device for a spectrometer effectively reduces the number of driving components in the adjustable slit device for a spectrometer by setting two sets of synchronization components. While ensuring the installation accuracy of the two sets of synchronization components, the size adjustment accuracy of the pinhole slit formed by the two sets of blades is effectively improved through the synchronous movement of the two sets of synchronization components. In addition, a set of adjustment driving parts is used to provide driving force, which effectively avoids the errors and assembly errors caused by the asynchronous movement of multiple driving parts in the related art. The smaller number of driving parts ensures that the overall volume of the adjustable slit device for the spectrometer is small and can be adapted to a wider range of scenarios. At the same time, the processing of the adjustable slit device for the spectrometer is convenient, the cost is low, and the assembly quality is high.

Description

Technical Field

[0001] The present application relates to the technical field of optical analysis instruments, and in particular to an adjustable slit device for a spectrometer. Background Art

[0002] In analytical instruments (spectrometers), monochromatic light within a certain wavelength range must pass through a slit. Slits are primarily used in applications such as spot processing, spectral processing, and light diffraction. Parameters such as the slit's opening parallelism, slit width, and resolution directly impact the performance of the analytical instrument. Therefore, slits play a crucial role in the instrument. Currently, optical systems in analytical instruments employ two methods: one employs a fixed slit, which limits the instrument's performance parameters and is unsuitable for most customers; another employs multiple slits of fixed width, which are switched between as needed during use. This method has limited variable positions and makes repeatable positioning accuracy difficult to guarantee; and the other employs electrically adjustable slit transmission mechanisms, which are bulky and difficult to guarantee in machining or assembly quality when the slit width is small (e.g., less than 0.1 mm). Summary of the Invention

[0003] The present invention provides an adjustable slit device for a spectrometer. This solves the problem in the prior art of urgently needing a slit device with adjustable slit width and a compact slit transmission mechanism. The technical solution is as follows:

[0004] In one aspect, an adjustable slit device for a spectrometer is provided, the adjustable slit device for a spectrometer comprising:

[0005] A frame, two first blades, two second blades, a first synchronization component, a second synchronization component and an adjustment drive member;

[0006] The frame has a mounting cavity;

[0007] The two first blades are located in the mounting cavity and arranged along a first direction. The first synchronization component is located in the mounting cavity and is connected to the two first blades. The first synchronization component is used to drive the two first blades to move synchronously toward each other or synchronously away from each other along the first direction.

[0008] The two second blades are arranged in the mounting cavity along a second direction, the two second blades are stacked and cross-arranged with the two first blades to form a square pinhole slit, and the second direction is perpendicular to the first direction;

[0009] The second synchronization component is located in the installation cavity and is connected to the two first blades and the two second blades respectively, and the second synchronization component is used to drive the two second blades to move synchronously toward each other or synchronously away from each other along the second direction;

[0010] The adjusting drive is mounted on the frame, and is configured to: drive the first synchronization component to move so as to drive the two first blades to move, and synchronously drive the two second blades to move through the second synchronization component.

[0011] Optionally, the second synchronization assembly includes: two first oblique sliding grooves arranged opposite to each other along the first direction on one second blade, two second oblique sliding grooves arranged opposite to each other along the first direction on another second blade, two first positioning pins, and two second positioning pins;

[0012] The two first inclined slots are correspondingly provided with the two first blades and correspond one-to-one with the two first positioning pins; the two second inclined slots are correspondingly provided with the two first blades and correspond one-to-one with the two second positioning pins; the first positioning pin passes through the corresponding first inclined slot and is fastened to the corresponding first blade; the second positioning pin passes through the corresponding second inclined slot and is fastened to the corresponding first blade;

[0013] When the two first blades move synchronously toward each other along the first direction, the first positioning pin is driven to slide in the corresponding first oblique groove, and the second positioning pin is driven to slide in the corresponding second oblique groove, so as to drive the two second blades to move synchronously toward each other; when the two first blades move synchronously away from each other along the first direction, the first positioning pin is driven to slide in the corresponding first oblique groove, and the second positioning pin is driven to slide in the corresponding second oblique groove, so as to drive the two second blades to move synchronously away from each other.

[0014] Optionally, the first oblique groove and the second oblique groove corresponding to the same first blade are symmetrically arranged about the first direction, and the two first oblique grooves are symmetrically arranged about the second direction, and the two second oblique grooves are symmetrically arranged about the second direction;

[0015] Among them, the distance between the ends of the two first oblique grooves in one second blade close to the other second blade is greater than the distance between the ends of the two first oblique grooves away from the other second blade; the distance between the ends of the two second oblique grooves in the other second blade close to the one second blade is greater than the distance between the ends of the two second oblique grooves away from the one second blade.

[0016] Optionally, the first synchronization component includes: two sliding rods arranged along the second direction, and a linkage rod distributed on one side of the two sliding rods, the sliding rods extending along the first direction and being slidably connected to the frame; the linkage rod is rotatably connected to the frame, and two ends of the linkage rod are respectively in contact with one end of the two sliding rods; one end of the two first blades is respectively fastened to the two sliding rods;

[0017] The adjusting driving member is used to drive one of the sliding rods to move along the first direction, and drives the other sliding rod to move along the first direction through the linkage rod, and the movement directions of the two sliding rods are opposite.

[0018] Optionally, the slide rod has a locking hole and a positioning hole arranged adjacent to each other, and the first blade has a first through hole coaxially arranged and connected to the locking hole, and a second through hole coaxially arranged and connected to the positioning hole;

[0019] The slit engraving device further includes: a positioning screw and a locking screw, wherein the positioning screw is sequentially inserted into the second through hole and the positioning hole; and the locking screw is sequentially inserted into the first through hole and the locking hole.

[0020] Optionally, the frame has two first guide members arranged along the second direction on the side wall of the installation cavity, the two first guide members correspondingly cooperate with the two first blades, and the first guide members extend along the first direction; the first blades cooperate with the corresponding first guide members to be slidably connected;

[0021] The frame has two second guide members arranged along the first direction on the side wall of the installation cavity, the two second guide members correspond to the two second blades, and the second guide members extend along the second direction; the second blades are slidably connected with the corresponding second guide members.

[0022] Optionally, the adjustment drive member has a first drive portion and a second drive portion, the first drive portion is located on a side of one of the slide rods away from the linkage rod, and the second drive portion is located on a side of the other slide rod away from the linkage rod;

[0023] The first driving unit includes: a stepper motor, a differential head, a wedge and a sphere, the output shaft of the stepper motor is connected to the differential head, and the differential head is mounted on the frame; the inclined surface of the wedge facing the slide rod has an inclined strip-shaped slide groove, the sphere contacts the side wall of the strip-shaped slide groove and the end of the slide rod respectively, the differential head and the sphere are arranged along the second direction, and the end of the differential head close to the sphere has a spherical head that cooperates with the sphere;

[0024] In which, the stepper motor is configured to: drive the differential head to move along the second direction close to the sphere or away from the sphere through the output shaft; the sphere is used to drive one of the slide rods to slide, so as to drive the two first blades and the two second blades to move toward each other synchronously; the second driving part is used to drive another slide rod to slide, so as to drive the two first blades and the two second blades to move away from each other synchronously.

[0025] Optionally, the second driving part includes: an elastic element and a supporting member, the supporting member is connected to the frame, and two ends of the elastic element are respectively in contact with the supporting member and one end of the other sliding rod facing away from the linkage rod.

[0026] Optionally, the frame has a sliding limit block fixed on a side wall of the mounting cavity, the sliding limit block is located between the two sliding rods along the second direction, and two side surfaces of each of the sliding rods are in contact with a side surface of the sliding limit block and a side wall of the mounting cavity respectively;

[0027] In which, the sliding rod that cooperates with the first driving part for movement has a first auxiliary sliding limit block at its end near the first driving part, the first auxiliary sliding limit block has a first inclined surface on the side facing the sliding limit block, the sliding limit block has a second inclined surface arranged parallel to the first inclined surface, and the first inclined surface and the second inclined surface have an overlapping area; the sliding rod that cooperates with the second driving part for movement has a second auxiliary sliding limit block at its end near the linkage rod, the second auxiliary sliding limit block has a third inclined surface on the side facing the sliding limit block, the corner of the sliding limit block has a fourth inclined surface arranged parallel to the third inclined surface, and the third inclined surface and the fourth inclined surface have an overlapping area.

[0028] Optionally, the adjustable slit device for the spectrometer further includes: two first fine-tuning bead bolts matched with two ends of one of the sliding rods, and two second fine-tuning bead bolts matched with two ends of the other sliding rod, wherein the axial directions of the first fine-tuning bead bolts and the second fine-tuning bead bolts are both parallel to the second direction;

[0029] In which, the frame body has two first connecting holes corresponding to the two first fine-tuning ball bolts, and the two first fine-tuning ball bolts are respectively located in the two first connecting holes; the frame body has two second connecting holes corresponding to the two second fine-tuning ball bolts, and the two second fine-tuning ball bolts are respectively located in the two second connecting holes, and are distributed at the two ends of the other sliding rod along the first direction.

[0030] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0031] By providing two sets of synchronization components, the number of driving components in the adjustable slit device for the spectrometer is effectively reduced. While ensuring the installation accuracy of the two sets of synchronization components, the synchronous movement of the two sets of synchronization components effectively improves the size adjustment accuracy of the pinhole slit formed by the two sets of blades. In addition, the use of a set of adjustment drive components to provide driving force effectively avoids the errors and assembly errors caused by the asynchronous movement of multiple drive components in the related art. The smaller number of drive components ensures that the overall size of the adjustable slit device for the spectrometer is small and can be adapted to a wider range of scenarios. At the same time, it makes the processing of the adjustable slit device for the spectrometer convenient, low-cost, and high-quality assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 1 is a schematic structural diagram of an adjustable slit device for a spectrometer provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 A front view of an adjustable slit assembly for a spectrometer is shown;

[0035] Figure 3 yes Figure 1 A schematic diagram of a portion of the structure of an adjustable slit device for a spectrometer is shown;

[0036] Figure 4 This is a partial structural diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application;

[0037] Figure 5 yes Figure 4 A front view of an adjustable slit assembly for a spectrometer is shown;

[0038] Figure 6 This is a partial structural diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application;

[0039] Figure 7 1 is an exploded schematic diagram of a partial structure of an adjustable slit device for a spectrometer provided in an embodiment of the present application;

[0040] Figure 8 This is a partial exploded schematic diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application;

[0041] Figure 9 yes Figure 8 The figure shows a schematic structural diagram of an adjustable slit device for a spectrometer.

[0042] Among them, the frame 100, the first blade 200, the second blade 300, the first synchronization component 400, the second synchronization component 500, the adjustment drive member 600, the installation cavity 101, the first inclined slide 501, the second inclined slide 502, the first positioning pin 503, the second positioning pin 504, the slide rod 401, the linkage rod 402, the locking hole 401a, the positioning hole 401b, the first connecting through hole 201, the second connecting through hole 202, the positioning screw 700, the locking screw 800, the first guide member 102, the second guide member 103, and the first guide protrusion 203 , the second guide protrusion 301, the first drive part 601, the second drive part 602, the stepping motor A1, the differential head A2, the wedge block A3, the sphere A4, the strip slide A31, the ball head A21, the elastic element 602a, the abutment 602b, the sliding limit block 104, the first auxiliary sliding limit block 401c, the first inclined plane m1, the second inclined plane m2, the second auxiliary sliding limit block 401d, the third inclined plane m3, the fourth inclined plane m4, the first fine-tuning ball bolt 900, the second fine-tuning ball bolt 1000, the first connecting hole 105, and the second connecting hole 106.

[0043] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0047] The slit is the gateway for light to enter a spectrometer, and its size directly affects the spectrometer's luminous flux. Adjustable-width slits are gaining increasing attention. However, due to the precision limitations of the slit mechanism, these slits are typically large, requiring complex and demanding manufacturing and installation processes. With the rapid development of the optoelectronics field, miniaturized spectrometers are becoming increasingly mainstream. Current adjustable slit devices used in spectrometers struggle to meet the demands of smaller spectrometers, necessitating the design of a compact and highly precise slit adjustment device.

[0048] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 is a structural diagram of an adjustable slit device for a spectrometer provided in an embodiment of the present application, Figure 2 yes Figure 1 A front view of an adjustable slit device for a spectrometer is shown. Figure 3 yes Figure 1 The adjustable slit device for a spectrometer may include a frame 100 , two first blades 200 , two second blades 300 , a first synchronization component 400 , a second synchronization component 500 , and an adjustment drive 600 .

[0049] The frame 100 used in the adjustable slit device of the spectrometer may have a mounting cavity 101 .

[0050] The two first blades 200 in the adjustable slit device for a spectrometer can be positioned within the mounting cavity 101 of the frame 100 and arranged along a first direction f1. The first synchronization assembly 400 can be positioned within the mounting cavity 101 of the frame 100 and connected to both first blades 200. The first synchronization assembly 400 can be configured to drive the two first blades 200 to synchronously move toward or away from each other along the first direction f1.

[0051] The two second blades 300 in the adjustable slit device for a spectrometer can be located in the mounting cavity 101 of the frame 100 and arranged along the second direction f2. The two second blades 300 can be stacked and cross-arranged with the two first blades 200 to form a square pinhole slit F. Here, the second direction f2 can be perpendicular to the first direction f1.

[0052] The second synchronization component 500 in the adjustable slit device of the spectrometer can be located in the installation cavity 101 of the frame 100 and connected to the two first blades 200 and the two second blades 300 respectively, and the second synchronization component 500 can be used to drive the two second blades 300 to move synchronously toward each other or synchronously away from each other along the second direction f2.

[0053] The adjustment drive 600 in the adjustable slit device for the spectrometer can be installed on the frame 100, and the adjustment drive 600 can be configured to: drive the first synchronization component 400 to move to drive the two first blades 200 to move, and synchronously drive the two second blades 300 to move through the second synchronization component 500.

[0054] For example, a first synchronization component 400 connected to the two first blades 200 and a second synchronization component 500 connected to the two first blades 200 and the two second blades 300 are integrated into an adjustable slit device for a spectrometer. Thus, a set of adjustment drive members 600 is used to drive the first synchronization component 400 to move the two first blades 200 closer to or farther from each other, thereby adjusting the distance between the two first blades 200. Simultaneously, during the movement of the two first blades 200, the second synchronization component 500 is used to drive the two second blades 300 closer to or farther from each other, thereby adjusting the distance between the two second blades 300 and, in turn, adjusting the size of the pinhole slit F. When the adjustable slit device for a spectrometer is integrated into an analytical instrument, the expanded laser beam passing through the pinhole slit F can intercept an area in the beam with uniform energy distribution, more conveniently obtaining a light spot with uniform energy distribution, and meeting the requirements of beam shaping.

[0055] In the embodiment of the present application, by providing two sets of synchronization components, the number of driving components in the adjustable slit device for the spectrometer is effectively reduced. While ensuring the installation accuracy of the two sets of synchronization components, the synchronous movement of the two sets of synchronization components effectively improves the size adjustment accuracy of the pinhole slit F surrounded by the two sets of blades. In addition, the use of a set of adjustment drive members 600 to provide driving force effectively avoids the errors and assembly errors caused by the asynchronous movement of multiple driving components in the related art. The smaller number of driving components ensures that the overall volume of the adjustable slit device for the spectrometer is small and can be adapted to a wider range of scenarios. At the same time, the processing of the adjustable slit device for the spectrometer is convenient, the cost is low, and the assembly quality is high.

[0056] In summary, the embodiment of the present application provides an adjustable slit device for a spectrometer, which may include: a frame, two first blades, two second blades, a first synchronization component, a second synchronization component, and an adjustment drive. By providing two sets of synchronization components, the number of drive components in the adjustable slit device for the spectrometer is effectively reduced. While ensuring the installation accuracy of the two sets of synchronization components, the size adjustment accuracy of the pinhole slit formed by the two sets of blades is effectively improved through the synchronous movement of the two sets of synchronization components. In addition, a set of adjustment drive components is used to provide driving force, which effectively avoids the errors and assembly errors caused by the asynchronous movement of multiple drive components in the related art. The smaller number of drive components ensures that the overall volume of the adjustable slit device for the spectrometer is small and adaptable to a wider range of scenarios. At the same time, the processing of the adjustable slit device for the spectrometer is convenient, the cost is low, and the assembly quality is high.

[0057] Optional, please refer to Figure 4 and Figure 5 , Figure 4 : is a partial structural diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application, Figure 5 yes Figure 4 A front view of an adjustable slit device for a spectrometer is shown. The second synchronization component 500 in the adjustable slit device for a spectrometer may include: two first oblique chutes 501 arranged opposite to each other along the first direction f1 on one second blade 300, two second oblique chutes 502 arranged opposite to each other along the first direction f1 on another second blade 300, two first locating pins 503, and two second locating pins 504. The two first oblique chutes 501 are arranged corresponding to the two first blades 200 and have a one-to-one correspondence with the two first locating pins 503, and the two second oblique chutes 502 are arranged corresponding to the two first blades 200 and have a one-to-one correspondence with the two second locating pins 504. Each first locating pin 503 can pass through the corresponding first oblique chutes 501 to be fastened to the corresponding first blade 200, and each second locating pin 504 can pass through the corresponding second oblique chutes 502 to be fastened to the corresponding first blade 200. When the two first blades 200 move toward each other along the first direction f1, the first positioning pin 503 is driven to slide in the corresponding first oblique groove 501, and the second positioning pin 504 is driven to slide in the corresponding second oblique groove 502, thereby driving the two second blades 300 to move toward each other along the second direction f2. When the two first blades 200 move synchronously away from each other along the first direction f1, the first positioning pin 503 is driven to slide in the corresponding first oblique groove 501, and the second positioning pin 504 is driven to slide in the corresponding second oblique groove 502, thereby driving the two second blades 300 to move synchronously away from each other along the second direction f2.

[0058] For example, when the adjusting drive member 600 drives the first synchronization component 400 to move and drive the two first blades 200 toward each other along the first direction f1, it also drives the first positioning pin 503 and the second positioning pin 504 to slide in the corresponding first inclined slot 501 and the second inclined slot 502, respectively, and drives the two second blades 300 toward each other along the second direction f2. When the adjusting drive member 600 drives the first synchronization component 400 to move and drive the two first blades 200 away from each other along the first direction f1, it also drives the first positioning pin 503 and the second positioning pin 504 to slide in the corresponding first inclined slot 501 and the second inclined slot 502, respectively, and drives the two second blades 300 away from each other along the second direction f2. In this way, the structure of the second synchronization component 500 is simple and compact. While ensuring the adjustment accuracy of the pinhole slit F, the overall volume of the adjustable slit device for the spectrometer is small, and it is adaptable to a wide range of scenarios. At the same time, the processing of the adjustable slit device for the spectrometer is convenient, low in cost, and high in assembly quality.

[0059] In this application, if Figure 5 As shown, the first oblique groove 501 and the second oblique groove 502 corresponding to the same first blade 200 can be symmetrically arranged about the first direction f1, and the two first oblique grooves 501 in one second blade 300 can be symmetrically arranged about the second direction f2, and the two second oblique grooves 502 in another second blade 300 can be symmetrically arranged about the second direction f2. The distance between the ends of the two first oblique grooves 501 in one second blade 300 that are closer to the other second blade 300 can be greater than the distance between the ends of the two first oblique grooves 501 that are away from the other second blade 300. The distance between the ends of the two second oblique grooves 502 in another second blade 300 that are closer to the one second blade 300 can be greater than the distance between the ends of the two second oblique grooves 502 that are away from the one second blade 300. Here, the first inclined groove 501 and the second inclined groove 502 corresponding to the same first blade 200 can be arranged along the second direction f2, and the first inclined groove 501 corresponding to one first blade 200 and the second inclined groove 502 corresponding to another first blade 200 are parallel to each other.

[0060] It should be noted that the two ends of each first inclined chute 501 may be two ends along the extension direction of the first inclined chute 501, and the first inclined chute 501 may be a linear chute. The two ends of each second inclined chute 502 may be two ends along the extension direction of the second inclined chute 502, and the second inclined chute 502 may be a linear chute.

[0061] In the present application, the adjustable slit device for the spectrometer may further include a double-hook anti-backlash tension spring (not shown), the ends of which may be fixed to two locating pins connected to the same second blade 300, further eliminating the positioning gap between the locating pins to improve the installation accuracy and the movement accuracy of the second blade 300. Here, the locating pin connected to the same second blade 300 may be the first locating pin 503 or the second locating pin 504.

[0062] Optional, please refer to Figure 6 , Figure 6 It is a partial structural diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application. The first synchronization component 400 in the adjustable slit device for a spectrometer may include: two slide bars 401 arranged along the second direction f2, and a linkage rod 402 distributed on one side of the two slide bars 401, each slide bar 401 can extend along the first direction f1 and be slidably connected to the frame 100. The linkage rod 402 can be rotatably connected to the frame 100, and the two ends of the linkage rod 402 can respectively contact one end of the two slide bars 401, and one end of the two first blades 200 can be respectively fastened to the two slide bars 401. Among them, the adjustment drive member 600 can be used to drive one slide bar 401 to move along the first direction f1, and drive the other slide bar 401 to move along the first direction f1 through the linkage rod 402, and the moving directions of the two slide bars 401 are opposite. In this case, when the adjustment drive member 600 drives one slide bar 401 to slide rightward, the slide bar 401 drives one end of the linkage bar 402 to rotate clockwise; this in turn causes the other end of the linkage bar 402 to rotate clockwise, pushing the other slide bar 401 to slide leftward. It should be noted that the process of one slide bar 401 sliding leftward, and then driving the other slide bar 401 to slide rightward via the linkage bar 402, is the same as described above and will not be repeated here.

[0063] For examples, please refer to Figure 7 , Figure 71 is an exploded schematic diagram of a partial structure of an adjustable slit device for a spectrometer provided in an embodiment of the present application. Each slide rod 401 may have a locking hole 401a and a positioning hole 401b arranged adjacent to each other, and the first blade 200 correspondingly connected to the slide rod 401 may have a first connecting through-hole 201 arranged coaxially with and in communication with the locking hole 401a, and a second connecting through-hole 202 arranged coaxially with and in communication with the positioning hole 401b. The adjustable slit device for a spectrometer may also include: a positioning screw 700 and a locking screw 800. The positioning screw 700 can be inserted into the second connecting through-hole 202 and the positioning hole 401b in sequence, and the locking screw 800 can be inserted into the first connecting through-hole 201 and the locking hole 401a in sequence. In this case, by providing a locking hole 401a and a positioning hole 401b on the slide bar 401, during the assembly process of the first blade 200 and the slide bar 401, the positioning screw 700 cooperates with the positioning hole 401b to achieve the assembly positioning of the first blade 200 and the slide bar 401, thereby ensuring the assembly accuracy of the two. In addition, the locking screw 800 cooperates with the locking hole 401a to achieve a tight connection between the first blade 200 and the slide bar 401.

[0064] In the examples of this application, please refer to Figure 8 and Figure 9 , Figure 8 1 is a partial exploded schematic diagram of another adjustable slit device for a spectrometer provided in an embodiment of the present application. Figure 9 yes Figure 8The schematic diagram of the structure of the adjustable slit device for a spectrometer is shown. The frame 100 can have two first guide members 102 arranged along the second direction f2 on the side wall of the installation cavity 101. The two first guide members 102 can be matched with the two first blades 200, and each first guide member 102 can extend along the first direction f1. Each first blade 200 can be slidably connected with the corresponding first guide member 102. The frame 100 has two second guide members 103 arranged along the first direction f1 on the side wall of the installation cavity 101. The two second guide members 103 can be matched with the two second blades 300, and the second guide members 103 can extend along the second direction f2. Each second blade 300 can be slidably connected with the corresponding second guide member 103. In this case, by disposing two first guide members 102 and two second guide members 103 on the side walls of the mounting cavity 101 of the frame 100, the two first blades 200 are respectively slidably connected to the two first guide members 102, and the two second blades 300 are respectively slidably connected to the two second guide members 103. In this way, while ensuring the parallelism of the two first guide members 102, the two first blades 200 can be effectively guaranteed to move along the extension direction of the two first guide members 102, ensuring the accuracy of operation. At the same time, while ensuring the parallelism of the two second guide members 103, the two second blades 300 can be effectively guaranteed to move along the extension direction of the two second guide members 103, ensuring the accuracy of operation, and ultimately ensuring the adjustment accuracy of the pinhole slit F.

[0065] For example, Figure 8 and Figure 9 As shown, the first guide member 102 may be a first guide groove extending along a first direction f1, and the end of the first blade 200 may have a first guide protrusion 203 that cooperates with the first guide groove. A portion of the first guide protrusion 203 extends into the first guide groove and is slidably connected to the first guide groove. The second guide member 103 may be a second guide groove extending along a second direction f2, and the end of the second blade 300 may have a second guide protrusion 301 that cooperates with the second guide groove. A portion of the second guide protrusion 301 extends into the second guide groove and is slidably connected to the second guide groove.

[0066] Optional, such as Figure 8 and Figure 9As shown, the adjustment drive member 600 includes a first drive portion 601 and a second drive portion 602. The first drive portion 601 can be located on the side of one slide rod 401 facing away from the linkage rod 402, and the second drive portion 602 can be located on the side of the other slide rod 401 facing away from the linkage rod 402. The first drive portion 601 can include: a stepper motor A1, a differential head A2, a wedge A3, and a sphere A4. The output shaft of the stepper motor A1 can be connected to the differential head A2, which can be mounted on the frame 100. The inclined surface of the wedge A3 facing the slide rod 401 can include an inclined strip-shaped groove A31. The sphere A4 can contact the sidewalls of the strip-shaped groove A31 and the end of the slide rod 401, respectively. The differential head A2 can be arranged with the sphere A4 along the second direction f2. The end of the differential head A2 near the sphere A4 can include a spherical head A21 that mates with the sphere A4.

[0067] The stepper motor A1 can be configured to drive the micrometer head A2 via its output shaft to move in a second direction f2 toward or away from the sphere A4. The sphere A4 can be used to drive a slide bar 401 to slide, thereby driving the two first blades 200 and the two second blades 300 to move synchronously toward each other. The second drive unit 602 can be used to drive another slide bar 401 to slide, thereby driving the two first blades 200 and the two second blades 300 to move synchronously away from each other.

[0068] For example, when the area of ​​the pinhole slit F needs to be adjusted to a smaller size, the stepper motor A1 rotates to drive the differential head A2 to move, so that the ball head A21 at the end of the differential head A2 can push the sphere A4 to slide in the strip slide A31, and then push the slide bar 401 to slide to the right, that is, the linear motion of the differential head A2 is converted into the linear motion of the slide bar 401 through the wedge A3 and the sphere A4. In addition, the stepper motor A1 and the differential head A2 cooperate to achieve micron-level adjustment accuracy of the pinhole slit F through the step angle of the stepper motor A1 and the pitch control of the differential head A2. For example, by selecting a differential head A2 with a pitch of 0.1mm and a stepper motor A1 with a pitch of 1.8°, the slit accuracy can reach 0.5um. The stepper motor A1 can be a closed-loop stepper motor, which has more precise control and higher adjustment accuracy.

[0069] It should be noted that when the first drive unit 601 is in an operating state, the second drive unit 602 is in a stopped state, that is, when the first drive unit 601 drives the first synchronization component 400 to move so that the two first blades 200 and the two second blades 300 all move synchronously toward each other, the second drive unit 602 will not drive the first synchronization component 400 to move. When the second drive unit 602 is in an operating state, the first drive unit 601 is in a stopped state, that is, when the second drive unit 602 drives the first synchronization component 400 to move so that the two first blades 200 and the two second blades 300 all move synchronously away from each other, the first drive unit 601 will not drive the first synchronization component 400 to move.

[0070] In this application, if Figure 8 and Figure 9 As shown, the second driving portion 602 includes an elastic element 602a and a supporting member 602b. The supporting member 602b can be connected to the frame 100. The two ends of the elastic element 602a can respectively contact the supporting member 602b and the end of the other slide rod 401 facing away from the linkage rod 402. In this way, when the two slide rods 401 drive the two first blades 200 to move synchronously toward each other, one slide rod 401 moves toward the right, while the other slide rod 401 moves toward the left and applies pressure to the elastic element 602a, causing the elastic element 602a to be in a compressed state. When the area of ​​the pinhole slit F needs to be increased, the stepper motor A1 drives the differential head A2 to move in the direction away from the sphere. At the same time, the elastic element 602a exerts a force on the other slide bar 401 to move to the right. In the process of moving to the right, the other slide bar 401 pushes the slide bar 401 that cooperates with the first drive part 601 to move to the left through the linkage rod 402, while causing the sphere A4 to slide upward in the strip slide groove A31.

[0071] In the embodiments of this application, Figure 8 and Figure 9As shown, the frame 100 may have a sliding limit block 104 fixed on the side wall of the installation cavity 101, and the sliding limit block 104 may be located between the two slide bars 401 along the second direction f2. The two side surfaces of each slide bar 401 arranged along the second direction f2 may respectively contact the side surface of the sliding limit block 104 and the side wall of the installation cavity 101. The end of the slide bar 401 that moves in coordination with the first driving part 601 and close to the first driving part 601 may have a first auxiliary sliding limit block 401c, and the side of the first auxiliary sliding limit block 401c facing the sliding limit block 104 may have a first inclined surface m1, and the sliding limit block 104 may have a second inclined surface m2 arranged parallel to the first inclined surface m1, and the first inclined surface m1 and the second inclined surface m2 may have an overlapping area. The sliding rod 401 that cooperates with the second driving part 602 has a second auxiliary sliding limit block 401d at the end close to the linkage rod 402. The second auxiliary sliding limit block 401d has a third inclined surface m3 on the side facing the sliding limit block 104. The sliding limit block 104 has a fourth inclined surface m4 arranged parallel to the third inclined surface m3. The third inclined surface m3 and the fourth inclined surface m4 may have an overlapping area.

[0072] In this case, by providing a sliding stopper 104 on the side wall of the mounting cavity 101 of the frame 100, a first auxiliary sliding stopper 401c is provided at the end of the slide bar 401 that cooperates with the first driving unit 601, and a second auxiliary sliding stopper 401d is provided at the end of the slide bar 401 that cooperates with the second driving unit 602. In this way, when the area of ​​the pinhole slit F is reduced, the first inclined surface m1 of the first auxiliary sliding stopper 401c in one slide bar 401 cooperates with the second inclined surface m2 in the sliding stopper 104 to limit the position, and the third inclined surface m3 of the second auxiliary sliding stopper 401d in the other slide bar 401 cooperates with the fourth inclined surface m4 in the sliding stopper 104 to limit the position, thereby preventing the slide bar 401 from excessively moving and causing damage to the blade.

[0073] It should be noted that if Figure 8 and Figure 9 As shown, the two side surfaces of each sliding rod 401 arranged along the second direction f2 can respectively contact the side surface of the sliding limit block 104 and the side wall of the mounting cavity 101. In other words, the sliding rod 401 can be located in the sliding space enclosed between the side surface of the sliding limit block 104 and the side wall of the mounting cavity 101, and the sliding rod 401 forms a clearance fit with the sliding space.

[0074] Optional, such as Figure 6 and Figure 9As shown, the adjustable slit device for the spectrometer may also include: two first fine-tuning bead bolts 900 that cooperate with one slide rod 401, and two second fine-tuning bead bolts 1000 that cooperate with the other slide rod 401. The axial directions of the first fine-tuning bead bolts 900 and the second fine-tuning bead bolts 1000 may be parallel to the second direction f2. In which, the frame 100 may have two first connecting holes 105 corresponding to the two first fine-tuning bead bolts 900, and the two first fine-tuning bead bolts 900 may be respectively located in the two first connecting holes 105 and slidably connected to the first connecting holes 105. The frame 100 may have two second connecting holes 106 corresponding to the two second fine-tuning bead bolts 1000, and the two second fine-tuning bead bolts 1000 may be respectively located in the two second connecting holes 106 and slidably connected to the second connecting holes 106.

[0075] In this case, by setting two fine-tuning ball bolts that cooperate with each sliding rod 401 in the adjustable slit device used for the spectrometer, the fine-tuning ball bolts can be rotated to achieve movement of the fine-tuning ball bolts relative to the frame 100, thereby enabling fine-tuning of the horizontality of each sliding rod 401 and the parallelism of the two sliding rods 401, thereby further improving the adjustment accuracy of the pinhole slit F.

[0076] In summary, the embodiment of the present application provides an adjustable slit device for a spectrometer, which may include: a frame, two first blades, two second blades, a first synchronization component, a second synchronization component, and an adjustment drive. By providing two sets of synchronization components, the number of drive components in the adjustable slit device for the spectrometer is effectively reduced. While ensuring the installation accuracy of the two sets of synchronization components, the size adjustment accuracy of the pinhole slit formed by the two sets of blades is effectively improved through the synchronous movement of the two sets of synchronization components. In addition, a set of adjustment drive components is used to provide driving force, which effectively avoids the errors and assembly errors caused by the asynchronous movement of multiple drive components in the related art. The smaller number of drive components ensures that the overall volume of the adjustable slit device for the spectrometer is small and adaptable to a wider range of scenarios. At the same time, the processing of the adjustable slit device for the spectrometer is convenient, the cost is low, and the assembly quality is high.

[0077] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0078] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An adjustable slit device for a spectrometer, characterized in that: include: A frame, two first blades, two second blades, a first synchronization component, a second synchronization component and an adjustment drive member; The frame has a mounting cavity; The two first blades are located in the mounting cavity and arranged along a first direction. The first synchronization component is located in the mounting cavity and is connected to the two first blades. The first synchronization component is used to drive the two first blades to move synchronously toward each other or synchronously away from each other along the first direction. The two second blades are arranged in the mounting cavity along a second direction, the two second blades are stacked and cross-arranged with the two first blades to form a square pinhole slit, and the second direction is perpendicular to the first direction; The second synchronization component is located in the installation cavity and is connected to the two first blades and the two second blades respectively, and the second synchronization component is used to drive the two second blades to move synchronously toward each other or synchronously away from each other along the second direction; The adjusting drive member is mounted on the frame, and is configured to: drive the first synchronization component to move so as to drive the two first blades to move, and synchronously drive the two second blades to move through the second synchronization component; The second synchronization assembly includes: two first oblique sliding grooves arranged opposite to each other along the first direction on one second blade, two second oblique sliding grooves arranged opposite to each other along the first direction on the other second blade, two first positioning pins, and two second positioning pins; The two first inclined slots are provided corresponding to the two first blades and correspond one-to-one with the two first positioning pins; the two second inclined slots are provided corresponding to the two first blades and correspond one-to-one with the two second positioning pins; the first positioning pin passes through the corresponding first inclined slot and is fastened to the corresponding first blade; the second positioning pin passes through the corresponding second inclined slot and is fastened to the corresponding first blade; When the two first blades move synchronously toward each other along the first direction, the first positioning pin is driven to slide in the corresponding first oblique groove, and the second positioning pin is driven to slide in the corresponding second oblique groove, so as to drive the two second blades to move synchronously toward each other; when the two first blades move synchronously away from each other along the first direction, the first positioning pin is driven to slide in the corresponding first oblique groove, and the second positioning pin is driven to slide in the corresponding second oblique groove, so as to drive the two second blades to move synchronously away from each other.

2. The adjustable slit device for a spectrometer according to claim 1, characterized in that: The first oblique groove and the second oblique groove corresponding to the same first blade are symmetrically arranged about the first direction, and the two first oblique grooves are symmetrically arranged about the second direction, and the two second oblique grooves are symmetrically arranged about the second direction; Among them, the distance between the ends of the two first oblique grooves in one second blade close to the other second blade is greater than the distance between the ends of the two first oblique grooves away from the other second blade; the distance between the ends of the two second oblique grooves in the other second blade close to the one second blade is greater than the distance between the ends of the two second oblique grooves away from the one second blade.

3. The adjustable slit device for a spectrometer according to claim 1 or 2, characterized in that: The first synchronization component includes: two sliding rods arranged along the second direction, and a linkage rod distributed on one side of the two sliding rods, the sliding rods extending along the first direction and being slidably connected to the frame; the linkage rod is rotatably connected to the frame, and two ends of the linkage rod are respectively in contact with one end of the two sliding rods; one end of the two first blades is respectively fastened to the two sliding rods; The adjusting driving member is used to drive one of the sliding rods to move along the first direction, and drives the other sliding rod to move along the first direction through the linkage rod, and the movement directions of the two sliding rods are opposite.

4. The adjustable slit device for a spectrometer according to claim 3, characterized in that: The slide rod has a locking hole and a positioning hole arranged adjacent to each other, and the first blade has a first connecting through hole coaxially arranged and connected to the locking hole, and a second connecting through hole coaxially arranged and connected to the positioning hole; The adjustable slit device for the spectrometer further includes: a positioning screw and a locking screw, wherein the positioning screw is sequentially inserted into the second connecting through hole and the positioning hole; and the locking screw is sequentially inserted into the first connecting through hole and the locking hole.

5. The adjustable slit device for a spectrometer according to claim 3, characterized in that: The frame has two first guide members arranged along the second direction on the side wall of the installation cavity, the two first guide members correspondingly cooperate with the two first blades, and the first guide members extend along the first direction; The first blade is slidably connected with the corresponding first guide member; The frame has two second guide members arranged along the first direction on the side wall of the installation cavity, the two second guide members correspondingly cooperate with the two second blades, and the second guide members extend along the second direction; The second blade is slidably connected with the corresponding second guide member.

6. The adjustable slit device for a spectrometer according to claim 3, characterized in that: The adjustment drive member comprises a first drive portion and a second drive portion, wherein the first drive portion is located on a side of one of the slide bars away from the linkage bar, and the second drive portion is located on a side of the other slide bar away from the linkage bar; The first driving unit includes: a stepper motor, a differential head, a wedge and a sphere, the output shaft of the stepper motor is connected to the differential head, and the differential head is mounted on the frame; the inclined surface of the wedge facing the slide rod has an inclined strip-shaped slide groove, the sphere contacts the side wall of the strip-shaped slide groove and the end of the slide rod respectively, the differential head and the sphere are arranged along the second direction, and the end of the differential head close to the sphere has a spherical head that cooperates with the sphere; In which, the stepper motor is configured to: drive the differential head to move along the second direction close to the sphere or away from the sphere through the output shaft; the sphere is used to drive one of the slide rods to slide, so as to drive the two first blades and the two second blades to move toward each other synchronously; the second driving part is used to drive another slide rod to slide, so as to drive the two first blades and the two second blades to move away from each other synchronously.

7. The adjustable slit device for a spectrometer according to claim 6, characterized in that: The second driving part includes an elastic element and a supporting member, the supporting member is connected to the frame, and two ends of the elastic element are respectively in contact with the supporting member and one end of the other sliding rod facing away from the linkage rod.

8. The adjustable slit device for a spectrometer according to claim 6, characterized in that: The frame body has a sliding limit block fixed on the side wall of the installation cavity, the sliding limit block is located between the two sliding rods along the second direction, and the two side surfaces of each sliding rod are in contact with the side surface of the sliding limit block and the side wall of the installation cavity respectively; The sliding rod that moves in cooperation with the first driving part has a first auxiliary sliding limit block at its end near the first driving part, the first auxiliary sliding limit block has a first inclined surface on a side facing the sliding limit block, the sliding limit block has a second inclined surface arranged parallel to the first inclined surface, and the first inclined surface and the second inclined surface have an overlapping area; The sliding rod that cooperates with the second driving part has a second auxiliary sliding limit block at its end near the linkage rod, and the second auxiliary sliding limit block has a third inclined surface on the side facing the sliding limit block, and the corner of the sliding limit block has a fourth inclined surface arranged parallel to the third inclined surface, and there is an overlapping area between the third inclined surface and the fourth inclined surface.

9. The adjustable slit device for a spectrometer according to any one of claims 4 to 8, characterized in that: The adjustable slit device for the spectrometer further includes: two first fine-tuning bead bolts matched with two ends of one of the sliding rods, and two second fine-tuning bead bolts matched with two ends of the other sliding rod, wherein the axial directions of the first fine-tuning bead bolts and the second fine-tuning bead bolts are both parallel to the second direction; In which, the frame body has two first connecting holes corresponding to the two first fine-tuning ball bolts, and the two first fine-tuning ball bolts are respectively located in the two first connecting holes; the frame body has two second connecting holes corresponding to the two second fine-tuning ball bolts, and the two second fine-tuning ball bolts are respectively located in the two second connecting holes, and are distributed at the two ends of the other sliding rod along the first direction.

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