Adjustable slit device for spectrograph

Abstract

The invention discloses an adjustable slit device for a spectrograph, and belongs to the technical field of optical analysis instruments. According to the adjustable slit device for the spectrograph, the number of driving parts in the adjustable slit device for the spectrograph is effectively reduced by arranging the two sets of synchronous assemblies, and under the condition that the installation precision of the two sets of synchronous assemblies is guaranteed, the adjustable slit device for the spectrograph is more stable through synchronous movement of the two sets of synchronous assemblies. The size adjusting precision of the pinhole slit defined by the two sets of blades is effectively improved. In addition, a set of adjusting driving part is adopted to provide driving force, and errors and assembly errors caused by asynchronous movement of a plurality of driving parts in related technologies are effectively avoided. The adjustable slit device for the spectrograph is simple in structure, small in size and wide in application scene due to the fact that the number of the driving components is small, and meanwhile the adjustable slit device for the spectrograph is convenient to machine, low in cost and high in assembling quality.

Description

Technical Field

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

[0002] In an analytical instrument (spectrometer), in order to intercept monochromatic light within a certain wavelength range, a slit is required. The slit is mainly used in occasions such as spot processing, spectral processing, and light diffraction. Indexes such as the opening parallelism of the slit, the slit width, and the resolution directly affect the performance of the analytical instrument. Therefore, the slit plays a very important role in the instrument. In the optical path system of current analytical instruments, one type uses a fixed slit, such a slit limits the performance parameters of the instrument and cannot meet the needs of most customers; another type uses multiple slits with fixed widths and switches between them as needed during use, but the number of variable gears is limited and it is difficult to guarantee the repeat positioning accuracy; in addition, the volume of the electric adjustable slit drive mechanism of another type is relatively large, and when the slit width is small (for example, less than 0.1 mm), it is difficult to guarantee the processing or assembly quality of the slit mechanism. Summary of the Invention

[0003] An embodiment of this application provides an adjustable slit device for a spectrometer, which can solve the problem in the prior art that there is an urgent need for a slit device with an adjustable slit width and a relatively small volume of the slit drive mechanism. The technical solution is as follows: On the one hand, an adjustable slit device for a spectrometer is provided. The adjustable slit device for a spectrometer includes: A frame body, two first blades, two second blades, a first synchronization component, a second synchronization component, and an adjustment driving member; The frame body has an installation cavity; The two first blades are arranged in the installation cavity along a first direction. The first synchronization component is located in the installation cavity and is connected to both of the two first blades, and the first synchronization component is used to drive the two first blades to move synchronously towards each other or synchronously away from each other along the first direction; The two second blades are arranged in the installation cavity along a second direction. The two second blades and the two first blades are arranged in a stacked and crossed manner 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 respectively connected to the two first blades and the two second blades, and the second synchronization component is used to drive the two second blades to move synchronously towards each other or synchronously away from each other along the second direction; The adjustment driving member is mounted on the frame body, and the adjustment driving member 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.

[0004] Optionally, the second synchronization component includes: two first inclined sliding grooves oppositely arranged along the first direction on one of the second blades, two second inclined sliding grooves oppositely arranged along the first direction on the other second blade, two first positioning pins, and two second positioning pins; The two first inclined sliding grooves are correspondingly arranged with the two first blades and are in one-to-one correspondence with the two first positioning pins; the two second inclined sliding grooves are correspondingly arranged with the two first blades and are in one-to-one correspondence with the two second positioning pins; the first positioning pin passes through the corresponding first inclined sliding groove and is fixedly connected to the corresponding first blade; the second positioning pin passes through the corresponding second inclined sliding groove and is fixedly connected to the corresponding first blade; Wherein, when the two first blades move synchronously and towards each other along the first direction, it drives the first positioning pin to slide in the corresponding first inclined sliding groove and the second positioning pin to slide in the corresponding second inclined sliding groove, so as to drive the two second blades to move synchronously and towards each other; when the two first blades move synchronously and away from each other along the first direction, it drives the first positioning pin to slide in the corresponding first inclined sliding groove and the second positioning pin to slide in the corresponding second inclined sliding groove, so as to drive the two second blades to move synchronously and away from each other.

[0005] Optionally, the first inclined sliding groove and the second inclined sliding groove correspondingly arranged with the same first blade are symmetrically arranged with respect to the first direction, and the two first inclined sliding grooves are symmetrically arranged with respect to the second direction, and the two second inclined sliding grooves are symmetrically arranged with respect to the second direction; Wherein, the distance between the ends of the two first inclined sliding grooves in one of the second blades close to the other second blade is greater than the distance between the ends of the two first inclined sliding grooves away from the other second blade; the distance between the ends of the two second inclined sliding grooves in the other second blade close to one second blade is greater than the distance between the ends of the two second inclined sliding grooves away from one second blade. 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 extend along the first direction and are slidably connected to the frame body; the linkage rod is rotatably connected to the frame body, and the two ends of the linkage rod are respectively in contact with one end of the two sliding rods; one ends of the two first blades are respectively fixedly connected 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 another of the sliding rods to move along the first direction through the linkage rod, and the moving directions of the two sliding rods are opposite.

[0006] Optionally, the slide bar 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; 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.

[0007] 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 are correspondingly matched with the two first blades, and the first guide members extend along the first direction; the first blades are slidably connected with the corresponding first guide members; 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.

[0008] 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 bars away from the linkage rod, and the second drive portion is located on a side of the other slide bar away from the linkage rod; The first driving part comprises: a stepping motor, a differential head, a wedge block and a sphere, the output shaft of the stepping motor is connected to the differential head, and the differential head is installed on the frame; the inclined surface of the wedge block arranged toward the slide bar has an inclined strip-shaped slide groove, the sphere is in contact with the side wall of the strip-shaped slide groove and the end of the slide bar 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 ball head matched with the sphere; In which, the stepper motor is configured as follows: driving 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 unit 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.

[0009] Optionally, the second driving part includes an elastic element and an abutting part. The abutting part is connected to the frame body, and two ends of the elastic element are respectively in contact with the abutting part and one end of the other sliding rod away from the linkage rod.

[0010] Optionally, the frame body has sliding limit blocks fixed on the side wall of the installation cavity. The sliding limit blocks are located between the two sliding rods along the second direction. Two side surfaces of each sliding rod are respectively in contact with the side surface of the sliding limit block and the side wall of the installation cavity. Wherein, the end of the sliding rod that cooperates with the first driving part and is close to the first driving part has a first auxiliary sliding limit block. One side of the first auxiliary sliding limit block facing the sliding limit block has a first inclined surface. The sliding limit block has a second inclined surface arranged parallel to the first inclined surface, and there is an overlapping area between the first inclined surface and the second inclined surface; the end of the sliding rod that cooperates with the second driving part and is close to the linkage rod has a second auxiliary sliding limit block. One side of the second auxiliary sliding limit block facing the sliding limit block has a third inclined surface. 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.

[0011] Optionally, the adjustable slit device for the spectrometer further includes two first fine-tuning ball bolts that cooperate with two ends of one sliding rod, and two second fine-tuning ball bolts that cooperate with two ends of the other sliding rod. The axial directions of the first fine-tuning ball bolts and the second fine-tuning ball bolts are both parallel to the second direction. Wherein, the frame body has two first connection 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 connection holes; the frame body has two second connection 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 connection holes and are distributed at two ends of the other sliding rod along the first direction.

[0012] The beneficial effects brought by the technical solution provided by the embodiments of the present application at least include: By setting two sets of synchronization components, the number of driving components in the adjustable slit device for the spectrometer is effectively reduced. On the premise of ensuring the installation accuracy of the two sets of synchronization components, through the synchronous movement of the two sets of synchronization components, the adjustment accuracy of the size of the pinhole slit formed by the two sets of blades is effectively improved. In addition, by using a set of adjustment driving components to provide driving force, the errors caused by asynchronous movement of multiple driving components and assembly errors in the related art are effectively avoided. Moreover, the smaller number of driving components ensures that the overall volume of the adjustable slit device for the spectrometer is small, the applicable scenarios are wide, and 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 of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of an adjustable slit device for a spectrometer provided by an embodiment of the present application; Figure 2 is Figure 1 The front view of the adjustable slit device for the spectrometer shown; Figure 3 is Figure 1 The partial structural schematic diagram of the adjustable slit device for the spectrometer shown; Figure 4 It is a partial structural schematic diagram of another adjustable slit device for a spectrometer provided by an embodiment of the present application; Figure 5 is Figure 4 The front view of the adjustable slit device for the spectrometer shown; Figure 6 It is a partial structural schematic diagram of yet another adjustable slit device for a spectrometer provided by an embodiment of the present application; Figure 7 It is an exploded schematic diagram of a partial structure of an adjustable slit device for a spectrometer provided by an embodiment of the present application; Figure 8 It is an exploded schematic diagram of a partial structure of another adjustable slit device for a spectrometer provided by an embodiment of the present application; Figure 9 is Figure 8 The structural schematic diagram of the adjustable slit device for the spectrometer shown.

[0015] Among them, the frame body 100, the first blade 200, the second blade 300, the first synchronization component 400, the second synchronization component 500, the adjustment driving part 600, the installation cavity 101, the first inclined sliding groove 501, the second inclined sliding groove 502, the first positioning pin 503, the second positioning pin 504, the sliding rod 401, the linkage rod 402, the locking hole 401a, the positioning hole 401b, the first connection through hole 201, the second connection through hole 202, the positioning screw 700, the locking screw 800, the first guiding part 102, the second guiding part 103, the first guiding convex part 203, the second guiding convex part 301, the first driving part 601, the second driving part 602, the stepping motor A1, the differential head A2, the wedge block A3, the sphere A4, the strip-shaped sliding groove A31, the ball head A21, the elastic element 602a, the abutting part 602b, the sliding limiting block 104, the first auxiliary sliding limiting block 401c, the first inclined plane m1, the second inclined plane m2, the second auxiliary sliding limiting block 401d, the third inclined plane m3, the fourth inclined plane m4, the first fine-tuning ball plunger 900, the second fine-tuning ball plunger 1000, the first connection hole 105, the second connection hole 106.

[0016] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0017] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail in conjunction with the drawings.

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0020] The slit is the gateway for light to enter the spectrometer, and the size of the slit directly affects the light flux of the spectrometer. Widely adjustable slits have attracted increasing attention. However, limited by the precision of the slit mechanism, the size of the widely adjustable slit is generally relatively large, and the manufacturing and installation processes have high requirements and are relatively cumbersome. Under the condition of the rapid development of the optoelectronic field, miniaturized spectrometers are becoming the mainstream of the market. Currently, the adjustable slit devices used in spectrometers are difficult to meet the needs of miniaturized spectrometers. Therefore, a miniaturized and highly precise slit adjustment device needs to be designed.

[0021] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 FIG. Figure 2 is Figure 1 a schematic structural view of an adjustable slit device for a spectrometer provided by an embodiment of the present application, Figure 3 is Figure 1 a front view of the adjustable slit device for a spectrometer shown in

[0022] The housing 100 in the adjustable slit device for a spectrometer may have an installation cavity 101.

[0023] The two first blades 200 in the adjustable slit device for a spectrometer may be arranged in the installation cavity 101 of the housing 100 along a first direction f1. The first synchronization assembly 400 may be located in the installation cavity 101 of the housing 100 and connected to both of the two first blades 200, and the first synchronization assembly 400 may be used to drive the two first blades 200 to move synchronously towards each other or synchronously away from each other along the first direction f1.

[0024] The two second blades 300 in the adjustable slit device for a spectrometer may be arranged in the installation cavity 101 of the housing 100 along a second direction f2. The two second blades 300 may be arranged in a stacked and crossed manner with the two first blades 200 to form a square pinhole slit F. Here, the second direction f2 may be perpendicular to the first direction f1.

[0025] The second synchronization assembly 500 in the adjustable slit device for a spectrometer may be located in the installation cavity 101 of the housing 100 and connected to the two first blades 200 and the two second blades 300 respectively, and the second synchronization assembly 500 may be used to drive the two second blades 300 to move synchronously towards each other or synchronously away from each other along the second direction f2.

[0026] The adjusting driving member 600 in the adjustable slit device for a spectrometer can be mounted on the frame 100, and the adjusting driving member 600 can be configured to: drive the first synchronizing member 400 to move so as to drive the two first blades 200 to move, and simultaneously drive the two second blades 300 to move through the second synchronizing assembly 500.

[0027] Exemplarily, by integrating in the adjustable slit device for a spectrometer the first synchronizing assembly 400 connected to the two first blades 200 and the second synchronizing assembly 500 connected to the two first blades 200 and the two second blades 300. In this way, a set of adjusting driving members 600 is adopted to drive the first synchronizing assembly 400 to move so that the two first blades 200 approach or move away from each other to adjust the distance between the two first blades 200. Meanwhile, during the movement of the two first blades 200, the two second blades 300 are driven to approach or move away from each other through the second synchronizing assembly 500 to adjust the distance between the two second blades 300, thereby 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 a region with uniform energy distribution in the beam, and a spot with uniform energy distribution can be obtained more conveniently, meeting the requirements of beam shaping for beam shaping.

[0028] In the embodiment of the present application, by providing two sets of synchronizing assemblies, the number of driving components in the adjustable slit device for a spectrometer is effectively reduced. On the premise of ensuring the installation accuracy of the two sets of synchronizing assemblies, through the synchronous movement of the two sets of synchronizing assemblies, the adjustment accuracy of the size of the pinhole slit F formed by the two sets of blades is effectively improved. In addition, by using a set of adjusting driving members 600 to provide the driving force, the errors caused by the asynchronous movement of multiple driving components and the assembly errors in the related art are effectively avoided. And the smaller number of driving components ensures that the overall volume of the adjustable slit device for a spectrometer is small, the applicable scenarios are wide, and at the same time, the processing of the adjustable slit device for a spectrometer is convenient, the cost is low, and the assembly quality is high.

[0029] In summary, the embodiment of the present application provides an adjustable slit device for a spectrometer, which may include: a frame body, two first blades, two second blades, a first synchronization component, a second synchronization component, and an adjustment driving member. By providing two sets of synchronization components, the number of driving components in the adjustable slit device for the spectrometer is effectively reduced. On the premise of ensuring the installation accuracy of the two sets of synchronization components, through the synchronous movement of the two sets of synchronization components, the adjustment accuracy of the size of the pinhole slit formed by the two sets of blades is effectively improved. In addition, by using a set of adjustment driving members to provide driving force, the errors and assembly errors caused by the asynchronous movement of multiple driving components in the related art are effectively avoided. And the smaller number of driving components ensures that the overall volume of the adjustable slit device for the spectrometer is small, the applicable scenarios are wide, and 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.

[0030] Optionally, please refer to Figure 4 and Figure 5 , Figure 4 which is a partial structural schematic diagram of another adjustable slit device for a spectrometer provided by the embodiment of the present application. Figure 5 is Figure 4 a front view of the adjustable slit device for the spectrometer shown in. The second synchronization component 500 in the adjustable slit device for the spectrometer may include: two first inclined chutes 501 oppositely arranged along the first direction f1 on one second blade 300, two second inclined chutes 502 oppositely arranged along the first direction f1 on the other second blade 300, two first positioning pins 503, and two second positioning pins 504. The two first inclined chutes 501 are correspondingly arranged with the two first blades 200 and are in one-to-one correspondence with the two first positioning pins 503. The two second inclined chutes 502 are correspondingly arranged with the two first blades 200 and are in one-to-one correspondence with the two second positioning pins 504. Each first positioning pin 503 can pass through the corresponding first inclined chute 501 and be fixedly connected to the corresponding first blade 200. Each second positioning pin 504 can pass through the corresponding second inclined chute 502 and be fixedly connected to the corresponding first blade 200. Wherein, when the two first blades 200 move towards each other along the first direction f1, the first positioning pin 503 is driven to slide in the corresponding first inclined chute 501, and the second positioning pin 504 is driven to slide in the corresponding second inclined chute 502, so as to drive the two second blades 300 to move towards each other along the second direction f2. When the two first blades 200 move away from each other synchronously along the first direction f1, the first positioning pin 503 is driven to slide in the corresponding first inclined chute 501, and the second positioning pin 504 is driven to slide in the corresponding second inclined chute 502, so as to drive the two second blades 300 to move away from each other synchronously along the second direction f2.

[0031] For example, when the adjusting driving member 600 drives the first synchronization assembly 400 to move, driving the two first blades 200 to approach each other along the first direction f1, at the same time, during the process of driving the first positioning pin 503 and the second positioning pin 504 to slide in the corresponding first inclined chute 501 and the second inclined chute 502 respectively, the two second blades 300 are driven to approach each other along the second direction f2. When the adjusting driving member 600 drives the first synchronization assembly 400 to move, driving the two first blades 200 to move away from each other along the first direction f1, at the same time, during the process of driving the first positioning pin 503 and the second positioning pin 504 to slide in the corresponding first inclined chute 501 and the second inclined chute 502 respectively, the two second blades 300 are driven to move away from each other along the second direction f2. In this way, the structure of the second synchronization assembly 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, the applicable scenarios are wide, and 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.

[0032] In the present application, as Figure 5 shown, the first inclined chute 501 and the second inclined chute 502 correspondingly arranged with the same first blade 200 can be symmetrically arranged with respect to the first direction f1, and the two first inclined chutes 501 in one second blade 300 can be symmetrically arranged with respect to the second direction f2, and the two second inclined chutes 502 in the other second blade 300 can be symmetrically arranged with respect to the second direction f2. Among them, the distance between the ends of the two first inclined chutes 501 in one second blade 300 that are close to the other second blade 300 can be greater than the distance between the ends of the two first inclined chutes 501 that are away from the other second blade 300. The distance between the ends of the two second inclined chutes 502 in the other second blade 300 that are close to one second blade 300 can be greater than the distance between the ends of the two second inclined chutes 502 that are away from one second blade 300. Here, the first inclined chute 501 and the second inclined chute 502 correspondingly arranged with the same first blade 200 can be arranged along the second direction f2, and the first inclined chute 501 corresponding to one first blade 200 and the second inclined chute 502 corresponding to the other first blade 200 are parallel to each other.

[0033] It should be noted that the two ends of each first inclined chute 501 can be the two ends along the extension direction of the first inclined chute 501, and the first inclined chute 501 can be a straight chute. The two ends of each second inclined chute 502 can be the two ends along the extension direction of the second inclined chute 502, and the second inclined chute 502 can be a straight chute.

[0034] In the present application, the adjustable slit device for a spectrometer may further include: a double-hook backlash-eliminating tension spring (not shown in the figure), and both ends of the double-hook backlash-eliminating tension spring may be respectively fixed on two positioning pins connected to the same second blade 300, so as to further eliminate the positioning gap of the positioning pins to improve the installation accuracy and the movement accuracy of the second blade 300. Here, the positioning pins connected to the same second blade 300 may be the first positioning pin 503 or the second positioning pin 504.

[0035] Optionally, please refer to Figure 6 , Figure 6 is a partial structural schematic diagram of another adjustable slit device for a spectrometer provided by 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 may extend along the first direction f1 and be slidably connected to the frame 100. The linkage rod 402 may be rotatably connected to the frame 100, and both ends of the linkage rod 402 may respectively contact one end of the two slide bars 401. One end of the two first blades 200 may be respectively fixedly connected to the two slide bars 401. Among them, the adjustment driving member 600 may 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 driving member 600 drives one slide bar 401 to slide to the right, the slide bar 401 drives one end of the linkage rod 402 to rotate clockwise; thereby causing the other end of the linkage rod 402 to rotate clockwise to push the other slide bar 401 to slide to the left. It should be noted that the process of one slide bar 401 sliding to the left and then driving the other slide bar 401 to slide to the right through the linkage rod 402 is the same as the above process, which will not be elaborated here.

[0036] Exemplarily, please refer to Figure 7 , Figure 7It is an exploded schematic view of a partial structure of an adjustable slit device for a spectrometer provided by an embodiment of the present application. Each slide bar 401 may have a locking hole 401a and a positioning hole 401b arranged adjacent to each other. The first blade 200 correspondingly connected to the slide bar 401 may have a first connection through hole 201 coaxially arranged and communicated with the locking hole 401a, and a second connection through hole 202 coaxially arranged and communicated with the positioning hole 401b. The adjustable slit device for a spectrometer may further include: a positioning screw 700 and a locking screw 800. The positioning screw 700 may be sequentially inserted into the second connection through hole 202 and the positioning hole 401b, and the locking screw 800 may be sequentially inserted into the first connection through hole 201 and the locking hole 401a. In this case, by providing the locking hole 401a and the positioning hole 401b on the slide bar 401, thus, during the assembly process of the first blade 200 and the slide bar 401, the assembly positioning of the first blade 200 and the slide bar 401 is realized through the cooperation of the positioning screw 700 and the positioning hole 401b, ensuring the assembly accuracy of the two. In addition, the fastening connection between the first blade 200 and the slide bar 401 is realized through the cooperation of the locking screw 800 and the locking hole 401a.

[0037] In the embodiment of the present application, please refer to Figure 8 and Figure 9 , Figure 8 is an exploded schematic view of a partial structure of another adjustable slit device for a spectrometer provided by an embodiment of the present application, Figure 9 is Figure 8Schematic structural diagram of an adjustable slit device for a spectrometer. The frame body 100 may 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 may cooperate with the two first blades 200 correspondingly, and each first guide member 102 may extend along the first direction f1. Each first blade 200 may be slidably connected to the corresponding first guide member 102 in a matching manner. The frame body 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 may cooperate with the two second blades 300 correspondingly, and the second guide member 103 may extend along the second direction f2. Each second blade 300 may be slidably connected to the corresponding second guide member 103 in a matching manner. In this case, by providing two first guide members 102 and two second guide members 103 on the side wall of the installation cavity 101 of the frame body 100, the two first blades 200 are respectively slidably connected to the two first guide members 102 in a matching manner, and the two second blades 300 are respectively slidably connected to the two second guide members 103 in a matching manner. Thus, on the premise of ensuring the parallelism of the two first guide members 102, the two first blades 200 can be effectively ensured to move along the extension direction of the two first guide members 102, ensuring the operation accuracy. At the same time, on the premise of ensuring the parallelism of the two second guide members 103, the two second blades 300 can be effectively ensured to move along the extension direction of the two second guide members 103, ensuring the operation accuracy, and finally ensuring the adjustment accuracy of the pinhole slit F.

[0038] Exemplarily, as Figure 8 and Figure 9 shown, the first guide member 102 may be a first guide groove extending along the first direction f1. The end of the first blade 200 may have a first guide protrusion 203 that cooperates with the first guide groove. A part 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 the second direction f2. The end of the second blade 300 may have a second guide protrusion 301 that cooperates with the second guide groove. A part of the second guide protrusion 301 extends into the second guide groove and is slidably connected to the second guide groove.

[0039] Optionally, as Figure 8 and Figure 9As shown in the figure, the adjusting driving member 600 has a first driving portion 601 and a second driving portion 602. The first driving portion 601 can be located on one side of the slide bar 401 away from the linkage rod 402, and the second driving portion 602 can be located on the other side of the slide bar 401 away from the linkage rod 402. The first driving portion 601 can include: a stepping motor A1, a micrometer head A2, a wedge block A3, and a sphere A4. The output shaft of the stepping motor A1 can be connected to the micrometer head A2, and the micrometer head A2 can be mounted on the frame 100. The inclined surface of the wedge block A3 facing the slide bar 401 can have an inclined strip-shaped chute A31. The sphere A4 can be in contact with the side wall of the strip-shaped chute A31 and the end of the slide bar 401 respectively. The micrometer head A2 and the sphere A4 can be arranged along the second direction f2. The end of the micrometer head A2 close to the sphere A4 can have a spherical head A21 that cooperates with the sphere A4.

[0040] Among them, the stepping motor A1 can be configured to: drive the micrometer head A2 to move along the second direction f2 towards or away from the sphere A4 through the output shaft. The sphere A4 can be used to drive one slide bar 401 to slide, so as to drive the two first blades 200 and the two second blades 300 to move synchronously towards each other. The second driving portion 602 can be used to drive the other slide bar 401 to slide, so as to drive the two first blades 200 and the two second blades 300 to move synchronously away from each other.

[0041] For example, when it is necessary to reduce the area of the pinhole slit F, the stepping motor A1 rotates to drive the micrometer head A2 to move, so that the spherical head A21 at the end of the micrometer head A2 can push the sphere A4 to slide in the strip-shaped chute A31, and then push the slide bar 401 to slide to the right. That is, the linear motion of the micrometer head A2 is converted into the linear motion of the slide bar 401 through the wedge block A3 and the sphere A4. In addition, the stepping motor A1 and the micrometer head A2 cooperate to achieve the micron-level adjustment accuracy of the pinhole slit F through the control of the stepping angle of the stepping motor A1 and the pitch of the micrometer head A2. For example, a micrometer head A2 with a pitch of 0.1 mm and a stepping motor A1 of 1.8° can make the slit accuracy reach 0.5 um. The stepping motor A1 can be a closed-loop stepping motor, and the control of the closed-loop stepping motor is more accurate and the adjustment accuracy is higher.

[0042] It should be noted that when the first driving unit 601 is in a working state, the second driving unit 602 is in a stopped working state, that is, when the first driving unit 601 drives the first synchronization component 400 to move so that the two first blades 200 and the two second blades 300 move synchronously toward each other, the second driving unit 602 will not drive the first synchronization component 400 to move. When the second driving unit 602 is in a working state, the first driving unit 601 is in a stopped working state, that is, when the second driving unit 602 drives the first synchronization component 400 to move so that the two first blades 200 and the two second blades 300 move synchronously away from each other, the first driving unit 601 will not drive the first synchronization component 400 to move.

[0043] In this application, if Figure 8 and Figure 9 As shown, the second driving part 602 includes: an elastic element 602a and abutting member 602b, the butting member 602b can be connected to the frame 100, and the two ends of the elastic element 602a can respectively contact the butting member 602b and one end of another slide bar 401 away from the linkage rod 402. In this way, in the process of the two slide bars 401 driving the two first blades 200 to approach each other synchronously, one slide bar 401 moves toward the right side, and the other slide bar 401 moves toward the left side and applies pressure to the elastic element 602a so that the elastic element 602a is in a compressed state. When the area of ​​the pinhole slit F needs to be enlarged, the stepper motor A1 drives the differential head A2 to move in the direction away from the sphere, and at the same time the elastic element 602a exerts a force on the other slide bar 401 to move rightward. During the process of moving rightward, the other slide bar 401 is pushed to the left by the linkage rod 402, which cooperates with the first drive unit 601, and at the same time, the sphere A4 slides upward in the strip slide groove A31.

[0044] In the embodiments of the present application, Figure 8 and Figure 9As shown, the housing 100 may have a sliding limit block 104 fixed to the side wall of the installation cavity 101. The sliding limit block 104 may be located between two sliding rods 401 in the second direction f2. The two side surfaces arranged in the second direction f2 in each sliding rod 401 may be in contact with the side surface of the sliding limit block 104 and the side wall of the installation cavity 101 respectively. Among them, the end of the sliding rod 401 that cooperates with the first driving part 601 and is close to the first driving part 601 may have a first auxiliary sliding limit block 401c. One side of the first auxiliary sliding limit block 401c facing the sliding limit block 104 may have a first inclined surface m1. The sliding limit block 104 may have a second inclined surface m2 arranged parallel to the first inclined surface m1, and there may be an overlapping area between the first inclined surface m1 and the second inclined surface m2. The end of the sliding rod 401 that cooperates with the second driving part 602 and is close to the linkage rod 402 has a second auxiliary sliding limit block 401d. One side of the second auxiliary sliding limit block 401d facing the sliding limit block 104 has a third inclined surface m3. The sliding limit block 104 has a fourth inclined surface m4 arranged parallel to the third inclined surface m3, and there may be an overlapping area between the third inclined surface m3 and the fourth inclined surface m4.

[0045] In this case, by arranging the sliding limit block 104 on the side wall of the installation cavity 101 of the housing 100, arranging the first auxiliary sliding limit block 401c at the end of the sliding rod 401 that cooperates with the first driving part 601, and arranging the second auxiliary sliding limit block 401d at the end of the sliding rod 401 that cooperates with the second driving part 602. In this way, during the process of reducing the area of the pinhole slit F, the first inclined surface m1 on the first auxiliary sliding limit block 401c in one sliding rod 401 cooperates with the second inclined surface m2 in the sliding limit block 104 for limiting, and the third inclined surface m3 on the second auxiliary sliding limit block 401d in the other sliding rod 401 cooperates with the fourth inclined surface m4 in the sliding limit block 104 for limiting, which can prevent the adverse phenomenon of blade damage caused by excessive movement of the sliding rod 401.

[0046] It should be noted that, as Figure 8 and Figure 9 shown, the two side surfaces arranged in the second direction f2 in each sliding rod 401 may be in contact with the side surface of the sliding limit block 104 and the side wall of the installation cavity 101 respectively. That is to say, the sliding rod 401 may be located in the sliding space formed between the side surface of the sliding limit block 104 and the side wall of the installation cavity 101, and the sliding rod 401 forms a clearance fit with the sliding space.

[0047] Optionally, as Figure 6 and Figure 9As shown, the adjustable slit device for a spectrometer may further include: two first fine-tuning ball bolts 900 cooperating with one slide bar 401, and two second fine-tuning ball bolts 1000 cooperating with the other slide bar 401. The axial directions of the first fine-tuning ball bolts 900 and the second fine-tuning ball bolts 1000 may be parallel to the second direction f2. Wherein, the frame 100 may have two first connection holes 105 corresponding to the two first fine-tuning ball bolts 900. The two first fine-tuning ball bolts 900 may be respectively located in the two first connection holes 105 and slidably connected to the first connection holes 105. The frame 100 may have two second connection holes 106 corresponding to the two second fine-tuning ball bolts 1000. The two second fine-tuning ball bolts 1000 may be respectively located in the two second connection holes 106 and slidably connected to the second connection holes 106.

[0048] In this case, by providing two fine-tuning ball bolts cooperating with each slide bar 401 in the adjustable slit device for a spectrometer, the movement of the fine-tuning ball bolts relative to the frame 100 is realized by rotating the fine-tuning ball bolts, and thus the levelness of each slide bar 401 and the parallelism of the two slide bars 401 can be finely adjusted, further improving the adjustment accuracy of the pinhole slit F.

[0049] 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 driving member. By providing two sets of synchronization components, the number of driving components in the adjustable slit device for a spectrometer is effectively reduced. On the premise of ensuring the installation accuracy of the two sets of synchronization components, through the synchronous movement of the two sets of synchronization components, the adjustment accuracy of the size of the pinhole slit formed by the two sets of blades is effectively improved. In addition, by using one set of adjustment driving member to provide driving force, the errors caused by the asynchronous movement of multiple driving components and the assembly errors in the related art are effectively avoided. And the smaller number of driving components ensures that the overall volume of the adjustable slit device for a spectrometer is small, the applicable scenarios are wide, and at the same time, the processing of the adjustable slit device for a spectrometer is convenient, the cost is low, and the assembly quality is high.

[0050] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0051] The above are only the optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope 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 arranged in the installation cavity along a first direction, the first synchronization component is located in the installation cavity and is connected to the two first blades, and 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 installation 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 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.

2. The adjustable slit device for a spectrometer according to claim 1, characterized in that: The second synchronization component comprises: two first oblique sliding grooves arranged opposite to each other along the first direction on one of the second blades, two second oblique sliding grooves arranged opposite to each other along the first direction on the other of the second blades, two first positioning pins, and two second positioning pins; The two first inclined slots are arranged corresponding to the two first blades and correspond one-to-one with the two first positioning pins; the two second inclined slots are arranged 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 toward each other synchronously along the first direction, the first positioning pin is driven to slide in the corresponding first inclined groove, and the second positioning pin is driven to slide in the corresponding second inclined groove, so as to drive the two second blades to move toward each other synchronously; when the two first blades move away from each other synchronously along the first direction, the first positioning pin is driven to slide in the corresponding first inclined groove, and the second positioning pin is driven to slide in the corresponding second inclined groove, so as to drive the two second blades to move away from each other synchronously.

3. The adjustable slit device for a spectrometer according to claim 2, 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 of the second blades 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.

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

5. The adjustable slit device for a spectrometer according to claim 4, characterized in that: The slide bar has a locking hole and a positioning hole arranged adjacent to each other, 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.

6. The adjustable slit device for a spectrometer according to claim 4, 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 are correspondingly matched 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 are correspondingly matched 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.

7. The adjustable slit device for a spectrometer according to claim 4, characterized in that: The adjusting driving member comprises a first driving part and a second driving part, wherein the first driving part is located at a side of one of the sliding rods away from the linkage rod, and the second driving part is located at a side of the other sliding rod away from the linkage rod; The first driving part comprises: a stepping motor, a differential head, a wedge block and a sphere, the output shaft of the stepping motor is connected to the differential head, and the differential head is installed on the frame; the inclined surface of the wedge block arranged toward the slide bar has an inclined strip-shaped slide groove, the sphere is in contact with the side wall of the strip-shaped slide groove and the end of the slide bar 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 ball head matched with the sphere; In which, the stepper motor is configured as follows: driving 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 unit 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.

8. The adjustable slit device for a spectrometer according to claim 7, characterized in that: The second driving part comprises: 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 away from the linkage rod.

9. The adjustable slit device for a spectrometer according to claim 7, 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 slide bars along the second direction, and the two side surfaces of each slide bar are in contact with the side surface of the sliding limit block and the side wall of the installation cavity respectively; The end of the slide bar that cooperates with the first driving part for movement and is close to the first driving part has a first auxiliary sliding limit block, 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 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 there is an overlapping area between the third inclined surface and the fourth inclined surface.

10. The adjustable slit device for a spectrometer according to any one of claims 5 to 9, 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 slide bars, and two second fine-tuning bead bolts matched with two ends of another of the slide bars, 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; Among them, 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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