Collimator, interferometer and spectrometer

Abstract

The invention discloses a collimator, an interferometer and a spectrometer. The collimator comprises a light source module and a lens module. The light source module and the lens module are inserted in the first direction, an adjusting gap exists in the inserting position in the direction perpendicular to the first direction, a fixing structure is further arranged between the light source module and the lens module, and the light source module and the lens module are fixed into a whole through the fixing structure. One of the light source module and the lens module is moved in the first direction, the inserting length can be adjusted, then the distance between the light source and the lens in the first direction is adjusted, and the divergence angle of the light source is adjusted; the distance between the light source of the light source module and the lens of the lens module in the second direction perpendicular to the first direction can be adjusted due to the fact that the adjusting gap exists at the inserting position, and therefore the emergent angle of the light source can be adjusted. Therefore, the relative position of the light source module and the lens module in the three-dimensional space can be adjusted based on the arrangement, and the divergence angle and the emergent angle of the light source can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to a laser device, and particularly to a collimator, an interferometer, and a spectrometer. Background Art

[0002] The collimator includes a light source and a lens. Taking the light source as a laser diode as an example, the divergence angle of the light source refers to the angle at which the cross-section of the laser beam gradually increases as the propagation distance increases after the laser beam is emitted from the laser emitter. The emission angle of the light source refers to the angle between the laser beam and the emission normal after the laser beam is emitted from the laser emitter. The lens is used to collimate the emitted light beam of the light source.

[0003] However, those skilled in the art have found that it is not easy to adjust the divergence angle and the emission angle of the existing collimator. Summary of the Invention

[0004] The purpose of the present application is to disclose a collimator, an interferometer, and a spectrometer, and the collimator can easily adjust the divergence angle and the emission angle.

[0005] In a first aspect, the present application discloses a collimator. The collimator includes a light source module and a lens module. The light source module and the lens module are inserted into each other along a first direction, and there is an adjustment gap in a direction perpendicular to the first direction at the insertion position. A fixing structure is further provided between the light source module and the lens module, and the fixing structure fixes the light source module and the lens module as a whole.

[0006] In some embodiments, the fixing structure is formed by glue curing between the adjustment gaps.

[0007] In some embodiments, the light source module includes a light source module housing, the lens module includes a lens module housing, one of the lens module housing and the light source module housing includes a glue application groove distributed circumferentially, and the other includes an adhesive portion distributed axially, and the adhesive portion corresponds to the glue application groove one by one; when the glue application groove is arranged on the lens module housing, along the direction from the light source module to the lens module, the bottom edge of the glue application groove is flush with or higher than the bottom edge of the lens module housing; when the glue application groove is arranged on the light source module housing, along the direction from the light source module to the lens module, the top edge of the glue application groove is flush with or lower than the top edge of the light source module housing.

[0008] In some embodiments, the glue application groove and the adhesive portion form a glue application structure; an insertion structure is included between the light source module housing and the lens module housing; the insertion structure and the glue application structure are the same structure.

[0009] In some embodiments, the dispensing groove is disposed on the outer surface of one of the lens module housing and the light source module housing.

[0010] In some embodiments, the light source module includes a light source module housing, the lens module includes a lens module housing, and the light source module housing and the lens module housing are plugged through plugging structures uniformly distributed in the circumferential direction; at least part of the plugging structures include claws and claw grooves. The claws are disposed on one of the light source module housing and the lens housing and are uniformly distributed in the circumferential direction. The claw grooves are disposed on the other of the light source module housing and the lens housing and are uniformly distributed in the circumferential direction.

[0011] In some embodiments, the claw includes a through hole that communicates with the claw groove.

[0012] In some embodiments, the claw groove is a notch.

[0013] In some embodiments, the lens module includes a lens module housing, a fixing member, and a lens; the lens module housing includes a lens mounting cavity. The lens mounting cavity includes a mounting cavity bottom surface. The lens is located on the mounting cavity bottom surface; the fixing member is fixedly connected to the side surface of the lens mounting cavity and abuts against the lens.

[0014] In some embodiments, the fixing member is in threaded cooperation with the side surface of the lens mounting cavity to achieve the fixed connection.

[0015] In some embodiments, the lens includes a lens bottom surface, and both the lens bottom surface and the mounting cavity bottom surface of the lens mounting cavity are flat and parallel to the horizontal plane.

[0016] In some embodiments, the lens module includes a buffer member, the buffer member is located in the lens mounting cavity, and opposite ends of the buffer member in the depth direction of the lens mounting cavity respectively abut against the fixing member and the lens.

[0017] In some embodiments, the side surface of the lens mounting cavity includes a mounting cavity step; the fixing member includes a small section and a large section with unequal diameters; an intersection of the small section and the large section forms a fixing member step; the mounting cavity step abuts against the fixing member step to limit the fixing member.

[0018] In some embodiments, the light source module includes a light source module housing, a base, and a light source, wherein the light source is located in the light source module housing; the base is inserted into the light source module housing; the base is exposed relative to the light source module housing and includes a heat exchange structure for heat exchange between the light source inside the light source module housing and the outside of the light source module.

[0019] In some embodiments, the light source module includes a light source, and the light source is a laser diode.

[0020] In a second aspect, the present application discloses an interferometer. The interferometer includes any one of the aforementioned collimators.

[0021] In a third aspect, the present application discloses a spectrometer. The spectrometer includes any one of the aforementioned interferometers.

[0022] For the collimator, the interferometer, and the spectrometer, since the light source module housing and the lens module housing are inserted into each other in the first direction, by moving one of the light source module and the lens module in the first direction, the insertion length can be adjusted, and further, the distance between the light source and the lens in the first direction can be adjusted, so as to adjust the divergence angle of the light source; because there is an adjustment gap at the insertion position, the distance between the light source of the light source module and the lens of the lens module in the second direction perpendicular to the first direction can be adjusted, thereby realizing the adjustment of the emission angle of the light source. Therefore, based on the above settings, the relative position between the light source module and the lens module in the three-dimensional space can be adjusted, so as to conveniently adjust the divergence angle and the emission angle of the light source. Furthermore, through the insertion and clearance fit, the light source module and the lens module can be disassembled and assembled as independent modules, and repeated disassembly and assembly can be achieved. Description of the Drawings

[0023] Figure 1 is a schematic diagram of a collimator of the present application;

[0024] Figure 2 is Figure 1 a schematic diagram of the collimator shown at a first angle;

[0025] Figure 3 is Figure 1 a schematic diagram of the collimator shown at a second angle;

[0026] Figure 4 is Figure 1 a schematic diagram of the collimator shown at a third angle;

[0027] Figure 5 is Figure 1 an exploded view of the collimator shown;

[0028] Figure 6 is a cross-sectional view of the collimator of the present application. Detailed Embodiments

[0029] Here, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described in conjunction with the drawings. When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial direction, radial direction, circumferential direction, etc.), then such terms are only used to explain the relative positional relationship, movement condition, etc. between components in a specific posture (as shown in the drawings); if the specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0031] See Figures 1 to 6 , the present application discloses a collimator. The collimator includes a light source module 1 and a lens module 2. The light source module 1 includes a light source module housing 11. The material of the light source module housing 11 is not limited, for example, it is copper. The light source module housing 11 can be the outer shell of the light source module 1. In the case where the structure of the collimator is not the structure shown in the figure, the light source module housing 11 can also be other housings of the light source module 1, as long as the light source module housing 11 is used for assembling with the lens module 2 to achieve subsequent insertion. The light source module 1 includes components such as a light source 12 and a base 13. The light source 12 is, for example, a laser diode, an LED, etc. The lens module 2 includes a lens module housing 21. The material of the lens module housing 21 is not limited. For example, the material is copper. Similarly, the lens housing 21 can be the outer shell of the lens module 2 or other housings of the lens module 2, as long as it is used for assembling with the light source module 1. The lens module 2 further includes components such as a lens 22. The lens 22 is used to collimate the emitted light of the light source 12, and the structure is not limited, as long as it can achieve the collimation effect.

[0032] See Figures 1 to 6 , the light source module 1 and the lens module 2 are inserted into each other in a first direction (in this embodiment, the light source module housing 11 is inserted into the lens module housing 21). The first direction can be referred to as Figure 1 , Figure 5 and Figure 1 as shown by the arrow X direction in. Thus, by inserting the light source module 1 and the lens module 2 into each other, the distance between the two in the first direction (which can be understood as the axial direction) is adjusted. Furthermore, the divergence angle of the light source 12 is adjusted. There is an adjustment gap in the direction perpendicular to the first direction. The adjustment gap is shown as H in Figure 6 . The direction perpendicular to the first direction is as shown in Figure 1 , Figure 5 and Figure 6As shown by arrow Y and arrow Z, by adjusting the adjustment gap at the insertion part, the distance between the light source module 1 and the lens module 2 in the second direction (which can be understood as the radial direction) can be adjusted (for example, the adjustment gap H on one side becomes smaller), thereby adjusting the emission angle of the light source 12. A fixing structure is also provided between the light source module 1 and the lens module 2. After the divergence angle and the emission angle are adjusted to meet the requirements, the fixing structure fixes the light source module 1 and the lens module 2 into one body. Therefore, based on the function of the fixing structure, the fixing structure is not limited, as long as it can fix the light source module 1 and the lens module 2 into a whole.

[0033] As described above, since the light source module housing 11 and the lens module housing 21 are inserted into each other along the first direction, moving one of the light source module 1 and the lens module 2 in the first direction can adjust the insertion length, and further adjust the distance between the light source 12 and the lens 22 along the first direction, so as to adjust the divergence angle of the light source 12; because there is an adjustment gap at the insertion part, the distance between the light source 12 of the light source module 1 and the lens 22 of the lens module 2 in the second direction perpendicular to the first direction can be adjusted, thereby realizing the adjustment of the emission angle of the light source 12. Therefore, based on the above settings, the relative positions of the light source module 1 and the lens module 2 in the three-dimensional space can be adjusted (the relative positions in the three-dimensional space can be realized by a tooling), thereby conveniently adjusting the divergence angle and the emission angle of the light source 12. Moreover, through the above insertion and clearance fit, the light source module 1 and the lens module 2 can be disassembled and assembled as independent modules, and repeated disassembly and assembly can be realized.

[0034] Although the light source 12 in this application is a laser diode (or a laser), those skilled in the art can understand that the structure of the above collimator can be applied to any component that needs to adjust the divergence angle and the emission angle.

[0035] Figures 1 to 4 And Figure 6 It shows the insertion of the light source module housing 11 and the lens module housing 21. However, based on the function generated by the above insertion and the adjustment gap at the insertion part, any part between the light source module 1 and the lens module 2 can be inserted and there is an adjustment gap at the insertion part.

[0036] Based on the technical concept of the insertion of the light source module 1 and the lens module 2, the insertion structure for realizing the insertion of the two is not limited to the structure of the cooperation between the claw and the claw groove described later, and can also be a structure similar to the shaft inserted into the hole, or a structure similar to a hoop.

[0037] The fixed structure is formed by dispensing and curing at the adjustment gap. Thus, after the divergence angle and the exit angle are adjusted, the light source module 1 and the lens module 2 are fixed by glue, which is convenient for fixing and facilitates the assembly of the light source module 1 and the lens module 2.

[0038] See Figures 1 to 5 , the lens module housing 21 includes dispensing grooves 211 distributed circumferentially. The light source module housing 11 includes bonding portions 111 distributed circumferentially. The bonding portions 111 correspond to the dispensing grooves 211 one by one. In an alternative embodiment, it may be that the lens module housing 21 includes bonding portions 111 and the light source module housing 11 includes dispensing grooves 211. For dispensing only, the circumferential distribution of the dispensing grooves 211 and the circumferential distribution of the bonding portions 111 include: a) uneven distribution in the circumferential direction; b) uniform distribution. For example, in the case where the subsequent dispensing structure and the plugging structure are the same structure, the distribution is uniform. Whether the dispensing grooves 211 and the bonding portions 111 are evenly distributed or not, as long as the light source module 1 and the lens module 2 can be finally fixed together. See Figures 1 to 4 , when the dispensing grooves 211 are provided on the lens module housing 21, along the direction from the light source module 1 to the lens module 2 (that is, the upward direction in the figure), the bottom edge of the dispensing groove 211 is flush with the bottom edge of the lens module housing 21. The flushness can be seen as shown by the dashed box F in Figure 3 . In some other embodiments, if the dispensing grooves 211 are not notches or the like, the bottom edge of the dispensing groove 211 can be higher than the bottom edge of the lens module housing 21. When the dispensing grooves 211 are provided on the light source module housing 11, along the direction from the light source module 1 to the lens module 2, the top edge of the dispensing groove 211 is flush with or lower than the top edge of the light source module housing 11. This way can be understood by rotating the bonding portions 111 and the dispensing grooves 211 by 180 degrees respectively with the help of Figure 3 .

[0039] As set above, since when the dispensing grooves 211 are provided on the lens module housing 21, along the direction from the light source module 1 to the lens module 2, the bottom edge of the dispensing groove 211 is flush with or higher than the bottom edge of the lens module housing 21, in this way, the dispensing position is at a certain distance from the bottom edge, and the glue is not easy to flow into the inside of the collimator from the bottom edge of the lens module housing 21 (see the G position in Figure 3 ), avoiding the glue from affecting the performance of the components inside the collimator. The same principle applies to the case where the top edge of the dispensing groove is flush with or lower than the top edge of the light source module housing, which will not be elaborated here. Only in this case, the glue enters the inside of the collimator from the top edge of the light source module housing 11.

[0040] SeeFigures 1 to 5 , the dispensing groove 211 is provided on the outer surface of the lens module housing 21. When the dispensing groove 211 is provided on the light source module housing 11, the dispensing groove 211 is provided on the outer surface of the light source module housing 11.

[0041] With the above settings, the dispensing groove 211 is provided on the outer surface of the lens module housing 21, or the dispensing groove 211 is provided on the outer surface of the light source module housing 11. There is more operating space on the outer surface, which is convenient for dispensing and fixing the light source module 1 and the lens module 2.

[0042] In this application, the dispensing groove 211 and the bonding portion 111 constitute a dispensing structure; an insertion structure is included between the light source module housing 11 and the lens module housing 21; the insertion structure and the dispensing structure are the same structure.

[0043] With the above settings, since the dispensing structure and the insertion structure are the same structure, it is convenient for dispensing, and it is also convenient for fixing and assembling the light source module 1 and the lens module 2, and the structure of the collimator is also streamlined.

[0044] See Figures 1 to 6 , the light source module housing 11 and the lens module housing 21 are inserted through the insertion structure evenly distributed in the circumferential direction; at least part of the insertion structure includes a claw and a claw groove. In this application, since the insertion structure and the dispensing structure are the same structure, therefore, the claw is the bonding portion 111, and the claw groove is the dispensing groove 211. Those skilled in the art can understand that the functions realized by the insertion structure and the dispensing structure are different, and they may not be the same structure. In Figures 1 to 6 , the claws (bonding portions 111) are provided on the light source module housing 11 and are evenly distributed in the circumferential direction of the light source module housing 11. The claw grooves (dispensing grooves 211) are provided on the lens module housing 21 and are evenly distributed in the circumferential direction of the lens module housing 21. Three claws and three claw grooves are shown in the figure. As another implementation manner, it is also possible that the claws are provided on the lens module housing 21 and are evenly distributed in the circumferential direction of the lens module housing 21, and the claw grooves are provided on the light source module housing 11 and are evenly distributed in the circumferential direction of the light source module housing 11.

[0045] With the above settings, the insertion structure is formed by the circumferentially distributed claws and claw grooves. Only by inserting the claws into the claw grooves can the distance between the light source module 1 and the lens module 2 in the first direction be adjusted, and the adjustment gap between the claws and the claw grooves in the direction perpendicular to the first direction can also be adjusted. Thus, the assembly of the light source module 1 and the lens module 2 is simple and convenient.

[0046] See Figures 1 to 6, when the jaw (adhesive part 111) is arranged on the light source module housing 11, the light source module housing 11 includes a housing body 112 (see Figure 4 ), and the jaw protrudes towards the lens module 2 relative to the housing body 112. The jaw includes a through hole 1111, and the through hole 1111 communicates with the jaw groove (dispensing groove 211). Of course, when the jaw is arranged on the lens module housing 21, the jaw is also provided with a through hole 1111, and the through hole 1111 still communicates with the jaw groove.

[0047] With the above arrangement, by providing the through hole 1111 in the jaw, during the process of fixing the light source module 1 and the lens module 2, the glue in the jaw groove (dispensing groove 211) is extruded and will flow out from the through hole 1111, preventing the glue from flowing to the position 1110 between the side surface of the jaw and the side surface of the jaw groove (as Figure 3 shown) to the marked G, and then flowing to the light passing part inside the collimator, which affects the light emission of the light source of the collimator.

[0048] See Figures 1 to 5 , the jaw groove (dispensing groove 211) is a notch.

[0049] With the above arrangement, since the dispensing groove 211 is a notch, the structure is simple and it is also convenient for dispensing. The notch cooperates with the jaw, which is also beneficial to the positioning between the light source module 1 and the lens module 2 and facilitates the assembly of the light source module 1 and the lens module 2.

[0050] See Figure 5 and Figure 6 , the lens module 2 includes a lens module housing 21, a lens 22, and a fixing member 23. The lens module housing 21 includes a lens mounting cavity 212. The lens mounting cavity 212 includes a mounting cavity bottom surface 2121. The lens 22 is located on the mounting cavity bottom surface 2121. The fixing member 23 is fixedly connected to the side surface of the lens mounting cavity 212 and abuts against the lens 22. The structure for realizing the fixed connection is not limited to the threaded structure described later, and it can be a snap structure or the like. The abutment can be a direct abutment, or as Figure 6 such that the fixing member 23 indirectly abuts against the lens 22.

[0051] As described above, the lens 22 is first placed on the bottom surface 2121 of the lens installation cavity 212, so that the lens 22 is not suspended during the assembly process, and then the lens 22 can be installed in place on the bottom surface 2121 of the installation cavity by pressing the fixing member 23 against the lens 22. The assembly of the lens 22 is convenient, the operation of installing the lens 22 is also simple, and it is also conducive to accurately controlling the installation position of the lens 22. Furthermore, the lens 22 can be bonded without glue, and thus, there is no problem of poor glue bonding accuracy and difficult operation.

[0052] In some embodiments, the fixing member 23 is threadedly matched with the side surface of the lens mounting cavity 212 to achieve the fixed connection.

[0053] As set up above, the lens 22 can be more easily installed and removed through the threaded connection.

[0054] See also Figure 6 The lens 22 includes a lens bottom surface 221 , and the lens bottom surface 221 and the mounting cavity bottom surface 2121 of the lens mounting cavity 212 are both planes and parallel to the horizontal plane.

[0055] As configured above, since the lens bottom surface 221 and the mounting cavity bottom surface 2121 are both planes and parallel to the horizontal plane, the flatness of the lens bottom surface 221 and the mounting cavity bottom surface 2121 is ensured, so that the installation position of the lens 22 can be controlled more accurately.

[0056] See also Figure 5 and Figure 6 The lens module 2 includes a buffer 24. The structure of the buffer 24 is not limited to Figure 5 The buffer member 24 is located in the lens mounting cavity 212, and opposite ends of the buffer member 24 along the depth direction of the lens mounting cavity 212 are respectively in contact with the fixing member 23 and the lens 22. The material of the buffer member 24 is not limited, as long as it can play a buffering role, for example, it is made of a polymer material and has elasticity.

[0057] As described above, by providing the buffer 24, and with the opposite ends of the buffer 24 respectively abutting against the fixing member 23 and the lens 22, the buffer 24 can reduce the deformation caused by the pressure of the fixing member 23 on the lens 22, which helps to avoid the possible crushing of the lens 22.

[0058] See also Figure 5 and Figure 6, a side surface of the lens mounting cavity 212 includes a mounting cavity step 2122. The fixing member 23 includes a small section 231 and a large section 232 with unequal diameters. In this embodiment, the lens mounting cavity 212, the small section 231, and the large section 232 may all be cylindrical (such as cylindrical in the case of the aforementioned threaded connection), or may not be cylindrical. For example, they may be cubic (such as cubic in the case where the fixing member 23 is clamped with the lens mounting cavity 212). An intersection of the small section 231 and the large section 232 forms a fixing member step 233. Refer to Figure 6 , the mounting cavity step 2122 abuts against the fixing member step 233 to limit the fixing member 23.

[0059] With the above arrangement, by the mounting cavity step 2122 abutting against the fixing member step 233 to limit the fixing member 23, the moving distance of the fixing member 23 within the lens mounting cavity 212 can be controlled. Furthermore, it can avoid the lens 22 being excessively squeezed and deformed or damaged. Moreover, since the fixing member 23 includes the small section 231 and the large section 232, correspondingly, the lens mounting cavity 212 including the mounting cavity step 2122 also has cavities with unequal sizes. In this way, it is more conducive to pressing the buffer member 24 in place and pressing the lens 22 tightly. If both the fixing member 23 and the lens mounting cavity 212 are cylindrical, due to manufacturing tolerances and other reasons, the cross-section of the lens mounting cavity 212 will be approximately trapezoidal (or trumpet-shaped), which causes the buffer member 24 not to be pressed in place and unable to press the lens 22 tightly.

[0060] Refer to Figure 5 and Figure 6 , the light source module 1 includes a light source module housing 11, a light source 12, and a base 13. The light source 12 is located within the light source module housing 11. For example, the light source 12 can be sleeved into the light source module housing 11 so that the light source 12 is located within the light source module 1. The base 13 is inserted into the light source module housing 11. The base 13 is exposed relative to the light source module housing 11 and includes a heat exchange structure. There is no limit on how it is exposed as long as the subsequent heat exchange can be achieved. For example, a part of the base 13 can protrude from the light source module housing 11 as shown in the figure, and this part is located outside the light source module housing 11, or the base 13 can be located inside the light source module housing 11, but it can be in contact with the outside of the light source module housing 11 as long as the subsequent heat exchange can be ultimately achieved. The heat exchange structure is used for heat exchange between the light source 12 inside the light source module 1 and the outside of the light source module 1. Based on the function of the base 13, the base 13 is also called a heat sink.

[0061] With the above settings, by setting the heat exchange structure, the temperature inside the light source module 1 can be adjusted to control the temperature of the light source 12. For example, when the temperature inside the light source module 1 is higher than the temperature outside the collimator, the heat inside the collimator is dissipated to the outside of the collimator through the heat exchange structure. When the temperature inside the collimator is low, the heat outside the collimator is transferred to the inside of the collimator through the heat exchange structure. In short, by setting the heat exchange structure on the base 13, it is beneficial to ensure the stability of the temperature inside the collimator and achieve the temperature control of the light source 12.

[0062] There are various structures for realizing heat exchange. For example, the base 13 is made of a heat-conducting material, such as a heat-conducting metal. After using the heat-conducting material, the base 13 is equivalent to having a built-in heat exchange structure, making the structure of the base 13 simpler.

[0063] In some embodiments, the base 13 and the light source 12 are adhesively bonded with glue.

[0064] With the above settings, through adhesive bonding, and since the light source 12 is located inside the light source module housing 11, it is very easy to form these three components into a module, and the assembly is convenient.

[0065] In a second aspect, the present application discloses an interferometer. The interferometer includes any one of the foregoing collimators.

[0066] In a third aspect, the present application discloses a spectrometer. The spectrometer includes any one of the foregoing light source diodes.

[0067] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A collimator, characterized in that, The collimator includes a light source module and a lens module, where: The light source module and the lens module are inserted into each other along a first direction, and there is an adjustment gap in a direction perpendicular to the first direction at the insertion position. A fixing structure is also provided between the light source module and the lens module, and the fixing structure fixes the light source module and the lens module as a whole.

2. The collimator according to claim 1, characterized in that, The fixing structure is formed by glue curing located between the adjustment gaps.

3. The collimator according to claim 2, wherein The light source module includes a light source module housing, and the lens module includes a lens module housing. One of the lens module housing and the light source module housing includes glue grooves distributed circumferentially, and the other includes bonding parts distributed axially, and the bonding parts correspond to the glue grooves one by one; When the glue groove is provided on the lens module housing, along the direction from the light source module to the lens module, the bottom edge of the glue groove is flush with or higher than the bottom edge of the lens module housing; When the glue groove is provided on the light source module housing, along the direction from the light source module to the lens module, the top edge of the glue groove is flush with or lower than the top edge of the light source module housing.

4. The collimator according to claim 3, characterized in that, The glue groove and the bonding part constitute a glue application structure; there is an insertion structure between the light source module housing and the lens module housing; the insertion structure and the glue application structure are the same structure; And / or, the glue groove is provided on the outer surface of one of the lens module housing and the light source module housing.

5. The collimator according to claim 1, wherein The light source module includes a light source module housing, and the lens module includes a lens module housing. The light source module housing and the lens module housing are inserted through an insertion structure evenly distributed circumferentially; at least part of the insertion structure includes a claw and a claw groove; The claw is provided on one of the light source module housing and the lens housing, and is evenly distributed circumferentially; The claw groove is provided on the other of the light source module housing and the lens housing, and is evenly distributed circumferentially.

6. The collimator according to claim 5, characterized in that, The claw includes a through hole, and the through hole communicates with the claw groove; And / or, the claw groove is a notch.

7. The collimator according to claim 1, characterized in that, The lens module includes a lens module housing, a fixing member and a lens; the lens module housing includes a lens installation cavity; the lens installation cavity includes an installation cavity bottom surface, and the lens is located on the installation cavity bottom surface; the fixing member is fixedly connected to the side surface of the lens installation cavity and abuts against the lens.

8. The collimator according to claim 7, characterized in that, The fixing member is in threaded cooperation with the side surface of the lens installation cavity to achieve the fixed connection; And / or, the lens includes a lens bottom surface, and both the lens bottom surface and the installation cavity bottom surface of the lens installation cavity are flat surfaces and are both parallel to the horizontal plane.

9. The collimator according to claim 7, characterized in that, The lens module includes a buffer member, the buffer member is located in the lens installation cavity, and opposite ends of the buffer member along the depth direction of the lens installation cavity respectively abut against the fixing member and the lens.

10. The collimator according to claim 9, characterized in that, The side surface of the lens installation cavity includes an installation cavity step; the fixing member includes a small section and a large section with unequal diameters; the intersection of the small section and the large section constitutes a fixing member step; the installation cavity step abuts against the fixing member step to limit the fixing member.

11. The collimator according to claim 1, characterized in that, The light source module includes a light source module housing, a base, and a light source. Among them, the light source is located inside the light source module housing; the base is inserted into the light source module housing; The base is exposed relative to the light source module housing and includes a heat exchange structure, which is used for heat exchange between the light source inside the light source module housing and the outside of the light source module; And / or, the light source module includes a light source, and the light source is a laser diode.

12. An interferometer, characterized in that, The interferometer includes the collimator according to any one of claims 1 to 11.

13. A spectrometer, characterized in that, The spectrometer includes the interferometer according to claim 12.

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