CN217718216U

CN217718216U - Optical module

Info

Publication number: CN217718216U
Application number: CN202221685258.6U
Authority: CN
Inventors: 张鹤腾; 黄林祥; 顾菲; 郎海涛
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-01
Anticipated expiration: 2032-07-01

Abstract

The application provides an optical module, includes: a light source assembly including a light source; an optical assembly comprising a first lens in a light emission optical path of the light source; and an adjustment assembly having an adjustment portion, wherein the adjustment portion is configured to adjust at least one of a distance from the light source assembly in an optical axis direction of the first lens, a position of the light source in a plane perpendicular to the optical axis direction, an inclination of the light source in a direction perpendicular to the optical axis direction, and a rotation of the light source around the optical axis direction, respectively.

Description

Optical module

Technical Field

The present disclosure relates to the field of active lens assembly and optical module assembly, and more particularly, to an optical module assembly structure.

Background

In order to obtain better picture quality, strict requirements on alignment precision among components of the optical module need to be met, and along with the increase of sensitivity of an optical system, the difficulty of system installation and adjustment is increased. The structure precision of products is generally guaranteed through the machining precision of controlling each optical assembly to current optical module product, guarantees the precision of module through equipment tool or manual technology to reject nonconforming product through the detection to finished product image quality, finally realize the management and control of product quality.

However, optical module products in the prior art have some problems, when sensitive items of an optical system are coupled with each other (such as the inclination and eccentric coupling of the LED lamp beads), the inclination of the lamp beads can be affected by adjusting eccentricity, and after conventional installation and adjustment are completed, the optical module products are directly fixed by glue, so that the reliability requirement and the installation and adjustment precision cannot be met. A new type of tuning solution is therefore needed to solve this problem.

It should be understood that the statements in this background section merely provide an aid in understanding the technical solutions disclosed herein and are not necessarily prior art to the filing date of the present application.

SUMMERY OF THE UTILITY MODEL

In one embodiment, the adjustment portion includes at least one of a screw pair, a guide structure, and a ball joint structure.

In one embodiment, the debug component comprises: a first barrel having an accommodating space, the first lens being disposed in the space of the first barrel; and one end of the connecting piece is connected to the first lens barrel, the other end of the connecting piece is connected to the light source component, and the first lens is positioned in a light emitting light path of the light source.

In one embodiment, the first barrel has a first thread structure, the connecting member has a second thread structure, and the first thread structure and the second thread structure are lockingly engaged to form a first thread pair, so that the connecting member is connected to the first barrel through the first thread pair, wherein the adjusting portion includes the first thread pair for adjusting a distance of the first lens from the light source assembly in an optical axis direction thereof and restricting a tilt of the first lens toward a direction perpendicular to the optical axis direction.

In one embodiment, the connecting member and the first barrel form a first guide structure by at least one of a smooth cambered surface fit or a flat surface fit, wherein the adjusting portion includes the first guide structure for adjusting a distance of the first lens from the light source assembly in an optical axis direction thereof and limiting a tilt of the first lens toward a direction perpendicular to the optical axis direction.

In one embodiment, the light source assembly further comprises: the first light source fixing part is connected with the connecting piece and is provided with a first arc surface, and the first arc surface is positioned on one side of the first light source fixing part, which is far away from the connecting piece; and the second light source fixing part is provided with a second arc surface matched with the first arc surface, so that the second light source fixing part forms a spherical hinge connecting structure with the first light source fixing part through smooth arc surface matching, wherein the adjusting part further comprises the spherical hinge connecting structure, the spherical hinge connecting structure is used for adjusting the inclination of the light source towards the direction vertical to the optical axis direction and/or adjusting the rotation of the light source around the optical axis direction, and the light source is positioned on one side of the second light source fixing part facing the first lens and extends into the second light source fixing part.

In one embodiment, the optical assembly further comprises: a second lens; and the assembly further comprises: and the second lens barrel is provided with an accommodating space and is arranged in the accommodating space in the second lens barrel, wherein the second lens barrel is connected to the first lens barrel so that the second lens is positioned in a light emitting optical path of the light source.

In one embodiment, the first lens barrel further has a third thread structure, the second lens barrel further has a fourth thread structure, and the third thread structure and the fourth thread structure form a second thread pair, so that the first lens barrel and the second lens barrel are connected by the second thread pair, wherein the adjusting portion further includes the second thread pair, and the second thread pair is used for adjusting a distance of the second lens from the light source assembly in the optical axis direction and limiting a tilt of the second lens toward a direction perpendicular to the optical axis direction.

In one embodiment, the first barrel and the second barrel form a second guiding structure by at least one of a smooth cambered surface fit or a flat surface fit, wherein the adjusting portion further includes the second guiding structure, and the second guiding structure is configured to adjust a distance of the second lens from the light source assembly in an optical axis direction thereof and limit a tilt of the second lens toward a direction perpendicular to the optical axis direction.

In one embodiment, the first light source fixing part and the connecting member are connected to each other by a first coupling structure including at least one of a screw connection structure and a welding structure, wherein the adjusting part further includes the first coupling structure for defining a position of the light source within a plane perpendicular to the optical axis direction.

In one embodiment, in a state where the first light source fixing part is connected to the connector, a plane of the first light source fixing part facing the first lens and a plane of the connector facing the second light source fixing part are attached to each other.

In one embodiment, the maximum fit tolerance of the first barrel to the connector is 0.030mm.

In one embodiment, the maximum fit tolerance of the first barrel to the second barrel is 0.030mm.

In one embodiment, the first guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the direction of the optical axis.

In one embodiment, the second guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the optical axis direction.

In one embodiment, the first part of the connector and the first part of the first barrel cooperate to form the first guide structure, and the coaxiality of the first part of the connector and the first part of the first barrel is not more than 0.01mm.

In one embodiment, the second part of the first barrel and the first part of the second barrel cooperate with each other to form the second guiding structure, and the coaxiality of the second part of the first barrel and the first part of the second barrel is not more than 0.01mm.

In one embodiment, the first arc surface and the second arc surface are segments of a spherical surface, and the diameter of the sphere on which the first arc surface is located and the diameter of the sphere on which the second arc surface is located do not differ by more than 0.1mm.

In one embodiment, the threaded connection includes at least one of a screw connection, a bolt connection, and a stud connection.

In one embodiment, adhesive is dispensed between the first thread structure and the second thread structure, and between the third thread structure and the fourth thread structure, for fixing the relative positions of the first barrel and the connecting member, and the first barrel and the second barrel, respectively.

In one embodiment, the second arc surface is fixed to the first arc surface by means of spot gluing.

In one embodiment, the light source is fixed to the second light source fixing portion by a dispensing fixing method.

In one embodiment, the second lens comprises a plurality of lenses, and each of the plurality of lenses is in a light emission optical path of the light source.

The application provides an optical module can have following at least one beneficial effect:

according to some embodiments of the application, the influence caused by glue contraction and creep can be eliminated, and the reliability of the product is improved;

according to some embodiments of the application, heat generated by the lamp bead/light source or the chip can be transferred to the outside through heat conduction, so that the product performance is improved; and

according to some embodiment of this application, carry out the split through the dress accent degree of freedom with between each part of optical module, reduced the dress and transferred the degree of difficulty, can make each part can both closely laminate after the dress is transferred to can support each other fixedly, improve manual dress and transfer precision and dress and transfer efficiency to a great extent.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a schematic diagram of an optical module according to the prior art;

FIG. 2 is a schematic diagram of an optical module according to an embodiment of the present disclosure;

FIG. 3 is an enlarged schematic view of a first guide structure according to an embodiment of the present application;

FIG. 4 is a schematic view of a light source rotating with a ball-and-socket joint structure according to an embodiment of the present application;

FIG. 5 is a schematic diagram of adhesive distribution at a threaded connection in an optical module according to an embodiment of the present disclosure; and

FIG. 6 is a schematic diagram illustrating another distribution of adhesive at a threaded connection in an optical module according to an embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present description, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not indicate any limitation on the features, and do not particularly indicate any precedence order. Thus, a first thread structure discussed in this application may also be referred to as a second thread structure, and vice versa, without departing from the teachings of this application.

In the drawings, the thickness, size, and shape of the components have been slightly adjusted for convenience of explanation. The figures are purely diagrammatic and not drawn to scale. For example, the thickness of the first light source fixing part illustrated in the drawings in the present application is not in proportion to actual production. As used herein, "substantially", "about" and similar terms are used as table-approximating terms and not as table-degree terms, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

It will be further understood that terms such as "comprising," "including," "having," "including," and/or "containing" are used in this specification to specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including engineering and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a schematic structural diagram of an optical module 100 according to the prior art. As shown in fig. 1, the optical module 100 may have a first collimating component 110, a second collimating component 120, and a light source assembly 130. The first collimating part 110 and the second collimating part 120 are both composed of a barrel and a collimating lens, and the light source assembly 130 is composed of a light source and a light source fixing part. The first collimating component 110 and the second collimating component 120, and the second collimating component 120 and the light source assembly 130 are all adhesively connected by glue 140.

The inventor of the present application finds that, under the condition that the sensitive items of the optical system are coupled to each other, the two collimating lenses and the light source in the optical module 100 are sensitive, whereas the installation and adjustment method in the prior art generally adopts suspended installation and adjustment, and although the installation and adjustment accuracy can meet the requirements, some problems exist. Firstly, the assembly and adjustment mode has no structural support, all stress is provided by glue, the shrinkage deformation of the glue is uncontrollable, the glue can creep with the increase of time, and the position change of parts caused by the shrinkage and creep of the glue is unpredictable, so that the requirement on assembly and adjustment precision cannot be met; secondly, the components are not in direct contact, so that the heat dissipation is difficult; thirdly, after the reliability test, the precision of the optical module can not meet the requirement, and the reliability of the module is poor.

To the drawback that present optical module exists, this application provides an optical module, can improve or solve above-mentioned problem partially at least.

An optical module according to an exemplary embodiment of the present disclosure may include a light source assembly, an optical assembly, and a tuning assembly. The light source component comprises a light source; the optical assembly includes a first lens; the adjusting assembly has an adjusting portion operable to at least one of adjust a distance of the first lens from the light source assembly in an optical axis direction thereof, adjust a position of the light source in a plane perpendicular to the optical axis direction, adjust an inclination of the light source toward a direction perpendicular to the optical axis direction, and adjust a rotation of the light source about the optical axis direction. The existence of regulating part can be a plurality of with the required installation and debugging degree of freedom split of optical module to adjust respectively, do benefit to and reduce the installation and debug the degree of difficulty and promote the installation and debug the precision. Illustratively, the adjustment portion may include a threaded pair, a guide structure, a ball-and-socket joint structure, or any combination thereof.

In an exemplary embodiment, the adjustment assembly includes a first barrel and a connector. The first lens barrel is provided with an accommodating space, and the first lens is arranged in the first lens barrel. One end of the connecting piece is connected to the first lens barrel, the other end of the connecting piece is connected to the light source component, and the first lens is positioned in a light emitting light path of the light source. When the lens barrel is adjusted, the displacement of the first lens in the optical axis direction (namely, the degree of freedom in the z direction) can be adjusted by adjusting the relative position between the connecting piece and the first lens barrel; after the adjustment is completed, the relative position of the connecting member and the first barrel is defined, and thereby the position of the first lens disposed within the first barrel is also defined. The other end of the connecting piece is connected to the light source component, and when the connecting piece is assembled and adjusted, the relative positions of the light source component and the connecting piece can be adjusted to limit the position of the light source component on a plane perpendicular to the optical axis direction (namely, the degree of freedom perpendicular to the z direction and including the degrees of freedom in the x direction and the y direction); after the adjustment is completed, the relative positions of the coupling member and the light source assembly are defined. The degree of freedom through with optical module needs the installation and transfers carries out the split, is favorable to reducing the installation and transfers the degree of difficulty, simultaneously each part closely laminates after the installation is transferred to can support each other fixedly, improve the efficiency of manual installation and transfer precision and installation and transfer to a great extent.

It should be noted that the optical module assembly scheme provided by the present application is also applicable to alignment assembly of chips or other devices having transmitting and/or receiving capabilities, for example, the light source in the optical module of the present application can be simply replaced by a chip, and other structures are not changed, and at least one of the above-described advantages can also be obtained.

In an exemplary embodiment, the first barrel has a first thread structure, the connecting member has a second thread structure at one end, the second thread structure is in locking fit with the first thread structure to form a first thread pair, and the connecting member and the first barrel can be connected through the first thread pair. The adjusting part comprises the first thread pair. When the lens is adjusted, the relative displacement of the first lens barrel and the connecting piece in the optical axis direction (namely the z direction) can be adjusted by adjusting the threaded fit between the first threaded structure and the second threaded structure of the connecting piece, and meanwhile, the inclination of the first lens towards the direction (comprising the x direction and the y direction) vertical to the optical axis direction can be limited by the existence of the first threaded pair; after the adjustment is completed, the relative position of the first barrel and the link is defined, and thus the position of the first lens is defined. Through above-mentioned screw-thread fit, the split of the first lens degree of freedom in the optical axis direction when can realizing the dress and transferring is favorable to reducing the dress and transfers the degree of difficulty to avoid to a certain extent the dress and transfer slope in x direction and y direction.

In an exemplary embodiment, the light source assembly further includes a first light source fixing part and a second light source fixing part. The first light source fixing part is connected with the connecting piece and is provided with a first arc surface, and the first arc surface is positioned on one side of the first light source fixing part, which is far away from the connecting piece; the second light source fixing part is provided with a second arc surface matched with the first arc surface, so that the second light source fixing part and the first light source fixing part form a spherical hinge connecting structure through smooth arc surface matching. The adjusting part comprises the spherical hinge connecting structure. When the light source is adjusted, the rotation of the light source around the optical axis (namely, the freedom degree of rotation around the z direction) and the position of the light source in the direction (including the x direction and the y direction) vertical to the optical axis direction (namely, the freedom degree in the x direction and the y direction) can be adjusted through the spherical hinge connection structure. At this time, the light source is located on one side of the second light source fixing part facing the first lens and extends into the second light source fixing part. Upon completion of the set-up, the relative positions of the first and second arc surfaces are defined. The existence of the spherical hinge structure can realize the splitting of the freedom degree of the light source in the x direction, the y direction and the direction of rotating around the z during the installation and adjustment, is favorable for reducing the installation and adjustment difficulty, and improves the manual installation and adjustment efficiency and precision.

In an exemplary embodiment, the connector and the first barrel form the first guide structure by at least one of a smooth cambered or flat surface fit. The adjusting part may include the first guide structure, which may be located at a side of a screw coupling structure formed by the first screw structure and the second screw structure, which is close to the light source. The first guide structure may be used to adjust and limit the displacement of the first lens in the optical axis direction (i.e., the degree of freedom in the z-direction) during and after the adjustment, respectively, and the presence of the first guide structure may also limit the tilt of the first lens in directions perpendicular to the optical axis direction (including the x-direction and the y-direction). The maximum distance of the first guide structure from the optical axis of the first lens may be smaller than the maximum distance of the first thread pair from the optical axis of the first lens. The first guide structure can further improve the installation and adjustment precision of the first lens barrel and the connecting piece in the z direction, and avoid the installation and adjustment inclination of the first lens barrel and the connecting piece in the x direction and the y direction.

In an exemplary embodiment, the optical assembly may further include a second lens having an accommodating space and a second barrel in which the second lens is mounted. The first lens barrel is further provided with a third thread structure, the second lens barrel is further provided with a fourth thread structure matched with the third thread structure, the third thread structure and the fourth thread structure are in locking fit to form a second thread pair, and the second lens barrel is connected with the first lens barrel through the second thread pair. The adjustment portion includes a second pair of threads. The first thread structure may be located on an outer wall of the first barrel, and the third thread structure may be located on an inner wall of the first barrel. The second lens may include a plurality of lenses, each of the plurality of lenses being located in a light emitting optical path of the light source. In the adjusting stage, the relative displacement of the second lens barrel and the first lens barrel can be adjusted through the second thread pair, and then the position of the second lens in the optical axis direction is adjusted. Meanwhile, the presence of the second screw pair can also restrict the tilt of the second lens toward the direction perpendicular to the optical axis direction (including the x direction and the y direction). After the adjustment is completed, the relative position of the second lens barrel and the first lens barrel will be defined, and the position of the second lens will also be defined. Through the second thread pair, the splitting of the degree of freedom of the second lens in the optical axis direction can be realized during the installation and adjustment, and the reduction of the installation and adjustment difficulty is facilitated.

In an exemplary embodiment, the first barrel and the second barrel form the second guide structure by at least one of a smooth cambered fit or a flat fit. The adjusting part comprises the second guide structure. The second guide structure may be located at a side of a screw connection structure formed by the third screw structure and the fourth screw structure, which is close to the light source. The maximum distance of the second guide structure from the optical axis of the second lens may be smaller than the maximum distance of the second thread pair from the optical axis of the second lens in this embodiment. The second guiding structure can be used to adjust and limit the displacement of the second lens in the optical axis direction (i.e. the degree of freedom in the z-direction) respectively during and after the adjustment. The second guide structure can further limit the inclination of the second lens in the x direction and the y direction, improve the adjustment precision of the first lens barrel and the second lens barrel in the z direction, and avoid the adjustment inclination in the x direction and the y direction.

In an exemplary embodiment, the first light source fixing part and the connector are connected to each other by a first coupling structure. The adjustment portion includes the first connection structure. The first coupling structure includes at least one of a threaded connection structure and a welded structure. The threaded connection structure may include at least one of a screw connection structure, a bolt connection structure, and a stud connection structure. Under the connection state of the first light source fixing part and the connecting piece, the plane of the first light source fixing part facing the first lens is attached to the plane of the connecting piece facing the second light source fixing part. During adjustment, the position of the first light source fixing part in a plane perpendicular to the optical axis direction can be adjusted (namely, the freedom degrees in the x direction and the y direction are adjusted), and after the adjustment is finished, the first light source fixing part and the connecting part are in a plane fit state in a threaded connection mode. The adjustment mode separates the degrees of freedom among different components, and reduces the adjustment difficulty.

In an exemplary embodiment, the maximum fitting tolerance of the first barrel and the connector is 0.030mm, and the maximum fitting tolerance of the first barrel and the second barrel is also 0.030mm. In other words, the maximum fitting tolerance between the two portions constituting the first guide structure is 0.030mm, and the maximum fitting tolerance between the two portions constituting the second guide structure is also 0.030mm. The maximum fit tolerance between the first lens barrel and the connecting piece and between the first lens barrel and the second lens barrel is controlled within a certain range, so that the inclination of the assembled parts can be reduced.

In an exemplary embodiment, the first guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the optical axis direction. The length of the first guide structure in the optical axis direction is controlled in a longer range, and the first lens barrel and the connecting piece are favorable for further reducing the inclination of the first lens barrel and the connecting piece in the x direction and the y direction in the assembling and adjusting process.

In an exemplary embodiment, the second guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the optical axis direction. The length of the second guide structure in the optical axis direction is controlled in a longer range, which is beneficial to further reducing the inclination of the first lens barrel and the second lens barrel in the x direction and the y direction in the process of adjustment.

In an exemplary embodiment, the first part of the connecting member and the first part of the first barrel cooperate with each other to form a first guiding structure, and the coaxiality of the first part of the connecting member and the first part of the first barrel is not more than 0.01mm, which is beneficial to reducing the inclination of the first barrel and the connecting member in the x direction and the y direction during the assembling and adjusting process.

In an exemplary embodiment, the second part of the first barrel and the first part of the second barrel cooperate with each other to form a second guiding structure, and the coaxiality of the second part of the first barrel and the first part of the second barrel is not more than 0.01mm, which is beneficial to reducing the inclination of the first barrel and the second barrel in the x direction and the y direction during the assembling and adjusting process.

In an exemplary embodiment, the first arc surface and the second arc surface are segments of a spherical surface, and the diameter of the sphere on which the first arc surface is located differs from the diameter of the sphere on which the second arc surface is located by no more than 0.1mm. The difference value between the two diameters is controlled within a reasonable range, so that the adjustment of the degree of freedom in the x direction, the y direction and the rotation direction around the z axis is facilitated, and the alignment and adjustment precision of the light source is improved.

In an exemplary embodiment, adhesive glue is dispensed between the first thread form and the second thread form, and between the third thread form and the fourth thread form. The fixing of the threaded connection part is bonded and reinforced through the adhesive, so that the stability of the connection position can be further improved.

In an exemplary embodiment, the second arc surface is fixed to the first arc surface by dispensing, so that the relative displacement between the first arc surface and the second arc surface is eliminated, and the alignment of the light source is ensured.

In an exemplary embodiment, the light source is fixed to the second light source fixing portion by dispensing, so as to ensure the stability and alignment of the light source.

However, it will be understood by those skilled in the art that the number, shape, size and position of the first to fourth thread structures, the first and second guide structures, the first and second lenses, the first and second components constituting the optical module may be varied to obtain the various results and advantages described in the present specification without departing from the claimed technical solution. For example, although the first and second lenses are described as an example in the embodiment, the present application is not limited to including the first and second lenses, and may include a larger number of lenses and the like if necessary.

Specific examples of the optical module applicable to the above embodiments are further described below with reference to the drawings.

Examples

Fig. 2 is a schematic structural diagram of an optical module 200 according to an embodiment of the present disclosure, and fig. 2 is an enlarged schematic view of a part of the structure in fig. 1. As shown in fig. 1, the optical module 200 may include an optical assembly 210, a light source assembly 230, and a conditioning assembly 220. The light source assembly 230 includes a light source 233; the optical assembly 210 includes a first lens 211 and a second lens 212; the assembly 220 has an adjustment portion that may include a first guide structure 260, a second guide structure 270, a first thread pair 280, a second thread pair 290, a first coupling structure 250, and a ball-and-socket joint structure 300. The adjustment assembly 220 may include a first barrel 241, a second barrel 242, and a connector 240.

The first barrel 241 and the second barrel 242 each have an accommodating space, the first lens 211 is mounted in the accommodating space of the first barrel 241, and the second lens 212 is mounted in the accommodating space of the second barrel 242; one end (e.g., one end in the z direction) of the connecting member 240 is connected to the first barrel 241, and the other end (e.g., one end in the z direction) is connected to the light source assembly 230; the light source assembly 230 includes a light source 233, and further, includes an LED light source. The first lens barrel 241 and the light source assembly 230 are connected by the connecting piece 240, so that the influence caused by glue shrinkage and creep in a glue connection mode can be eliminated, and the reliability of a product can be improved.

In other embodiments, the structure shown at 233 in FIG. 2 may be a chip or other device having transmitting and/or receiving capabilities.

In some embodiments, the first barrel 241 has a first thread structure 2111, one end (end along the z direction) of the connecting member 240 has a second thread structure 2212, and the second thread 2212 is matched with the first thread structure 2111 and forms a first thread pair 280 by locking and fixing, so that the connecting member 240 and the second barrel 241 can form a connection by the locking and fixing of the second thread structure 2212 and the first thread structure 2111. Through the first thread pair 280, the splitting of the freedom degree of the first lens in the z direction during the assembling and adjusting can be realized, the assembling and adjusting difficulty is favorably reduced, and the assembling and adjusting inclination in the x direction and the y direction is avoided to a certain extent.

Fig. 3 is an enlarged schematic view of the first guiding structure 260 according to an embodiment of the present application. Referring to fig. 2 and 3, the outer wall of the first barrel 241 has at least one of a smooth arc surface or a smooth plane, the inner wall of the first barrel 241 has a smooth arc surface/a smooth plane which is the same as the smooth arc surface/the smooth plane on the outer wall of the first barrel 241 and is fitted with each other, and the first part of the first barrel 241 and the first part of the connecting member 240 form the first guiding structure 260 through the mutually fitted smooth arc surface/the mutually fitted smooth plane. It is understood that a smooth curved surface is a surface that curves a flat surface to a certain curvature, the smooth curved surface not having both a concave surface and a convex surface. The smooth cambered surface cooperation that this application adopted is for example the cooperation between the cylindric cambered surface.

The first guide structure 260 may be located on one side of the first thread pair 280 formed by the first thread structure 2111 and the second thread structure 2212 in the z-direction. Exemplarily, the maximum distance of the first guide structure 260 from the optical axis of the first lens 212 may be smaller than the maximum distance of the first thread pair 280 from the optical axis of the first lens 212 in the present embodiment. The length of the first guide structure 260 along the z direction may be 1.3-3 mm, the coaxiality of the mating segment thereof is within 0.01mm, and the maximum tolerance of the mating segment thereof is 0.03mm. The presence of the first guide structure 260 may further improve the alignment accuracy of the first barrel 241 and the connecting member 240 in the z direction, and may further avoid the alignment tilt in the x direction and the y direction.

Fig. 4 is a schematic view of the light source 233 rotating with the ball-and-socket joint structure 300 according to an embodiment of the present application. As shown in fig. 2 and 4, the light source assembly 230 further includes a light source 233, a first light source fixing portion 231, and a second light source fixing portion 232. The first light source fixing part 231 is connected with the connecting member 240 and has a first arc surface 2311, which is located on a side of the first light source fixing part away from the connecting member, i.e., on a side along the z-direction; the second light source fixing part 232 has a second arc surface 2322 adapted to the first arc surface, so that the second light source fixing part 232 forms a spherical hinge connection with the first light source fixing part 231 through a smooth arc surface fit. At this time, the light source 233 is located at a side of the second light source fixing portion 232 facing the first lens 212 and extends into the second light source fixing portion. Due to the spherical hinge connecting structure 300, the light source 233 can be disassembled in the freedom degrees in the x direction, the y direction and the direction rotating around the z direction during assembly and adjustment, the assembly and adjustment difficulty is reduced, and the manual assembly and adjustment efficiency and precision are improved.

In some embodiments, the first arc surface 2311 and the second arc surface 2322 may be segments of a spherical surface, and the diameter of the sphere on which the first arc surface 2311 is located and the diameter of the sphere on which the second arc surface 2322 is located may be the same or similar, and the difference between the diameters may not exceed 0.1mm.

When the light source assembly 232 is assembled and adjusted, the application of the spherical hinge connecting structure 300 ensures the degree of freedom of the light source 233 around the z-axis direction, so that the light source 233 can be adjusted in position around the z-axis direction; the freedom of the light source 233 in the x-tilt and y-tilt directions is also secured, and the light source 233 can be rolled along the smooth arc surface of the second light source fixing part 232 within the first light source fixing part 231, so that the adjustment in the x-tilt and y-tilt directions can be performed.

With reference to fig. 2, in a connection state of the first light source fixing portion 231 and the connection member 240, a plane of the first light source fixing portion 231 close to the first lens 212 is attached to a plane of the connection member 240 close to the light source 233. The first light source fixing part 231 and the connection member 240 may be connected by a first coupling structure 250, and the first coupling structure 250 includes at least one of a screw connection structure and a welding structure. The screw connection structure may include at least one of a bolt connection structure, a stud connection structure, and a screw connection structure shown in fig. 2. After the first light source fixing portion 231 is disposed to be attached to the plane of the connection member 240 and the position of the light source 233 in the x-direction and the y-direction is adjusted, the position thereof may be defined by screwing/welding between the first light source fixing portion 231 and the connection member 240.

In some embodiments, the first barrel 241 further has a third thread structure 2113, and the second barrel 242 further has a fourth thread structure 2411 that mates with the third thread structure 2113, the third thread structure 2113 and the fourth thread structure 2411 lockingly mating to form the second thread pair 290. And the second barrel 242 is coupled with the first barrel 241 by screw-fitting. The first screw structure 2111 may be located at an outer wall (one side in the x direction) of the first barrel 241, and the third screw structure 2113 may be located at an inner wall (one side in the x direction) of the first barrel 241. The presence of second thread pair 290 allows for a resolution of the adjustment freedom of second lens 212 in the z-direction, thereby facilitating a reduction in the difficulty of adjustment and avoiding to some extent its inclination in the x-and y-directions.

In some embodiments, the second portion of first barrel 241 and the first portion of second barrel 242 form second guiding structure 270 by at least one of a smooth cambered surface fit or a flat surface fit. The second guiding structure 270 may be located on a side of the second thread pair 290 near the light source 233. Illustratively, the maximum distance of the second guide structure 270 from the optical axis of the second lens 212 may be smaller than the maximum distance of the second thread pair 290 of the present embodiment from the optical axis of the second lens 212. The length of the second guide structure 270 in the z direction may be 1.3 to 3mm, the coaxiality of the mating segment thereof is within 0.01mm, and the maximum tolerance of the mating segment thereof is 0.03mm. The presence of the second guiding structure 270 can further improve the alignment accuracy of the second barrel 242 and the second barrel 241 in the z direction, and avoid the alignment inclination of the system in the x direction and the y direction.

It will be appreciated that the air space between the components of the optical module 200 can be ensured by the screw fit and the guide structure, and the presence of the guide structure can also improve the problems of lens tilt (including x-direction tilt and y-direction tilt) caused by the large screw fit clearance. In addition, the first guide structure 260 and/or the second guide structure 270 may provide freedom in the z direction and the z-direction for the adjustment process of the optical lens 200. And further defines the tilt of the first lens 212 and/or the second lens 242 in the x-direction and the y-direction. The existence of the second guiding structure 270 can provide mechanical support for the components (e.g., the second barrel 242, the second barrel 241) in the optical module 200, and eliminate the influence caused by glue shrinkage and creep, thereby improving the reliability of the product.

First thread pair 280 and first guide 260 may cooperate to provide freedom of simultaneous z-direction adjustment of first lens 211 and second lens 212 during adjustment. In addition, second thread pair 290 and second guiding structure 260 may together ensure the freedom of adjustment of second lens 212 in the z-direction.

Fig. 5 is a schematic diagram of the distribution of the adhesive 310 at the threaded connection according to an embodiment of the present application. As shown in connection with fig. 2 and 5, an adhesive 310 is applied between the first thread structure 2111 and the second thread structure 2212, and between the third thread structure 2113 and the fourth thread structure 2411. Illustratively, the thread connection may be coated with the adhesive 310 in a whole circle, and after the curing and shrinking of the adhesive 310, the overall deformation of the adhesive is less than 2%, and the bonding force is greater than 4Mpa. The adhesive glue 310 may comprise a UV curable glue. The adhesive 310 is distributed over the entire circumference to secure sufficient adhesive force.

In other embodiments of the present application, the distribution of the adhesive 311 between the first and

second thread structures

2111 and 2212, and at the threaded connection between the third and

fourth thread structures

2113 and 2411 is shown in fig. 6. The adhesive 311 is symmetrically distributed along four sections of the circumference of the threaded connection. The four-section symmetrical dispensing can save the glue consumption and can offset the stress change caused by glue shrinkage. Similarly, the fixing manner of the light source 233 on the second light source fixing portion 232 includes dispensing fixing.

In some embodiments, the second lens 212 may include a plurality of lenses, each of which is located in the light emitting optical path of the light source 233. The first lens 211 and the second lens 212 may be collimating lenses.

For example, in order to ensure that the sidewalls of the first barrel 241/the second barrel 242 are not easily deformed, the first barrel 241/the second barrel 242 may be made of a harder metal, such as stainless steel (SUS 303) and brass (C3604). The material of each of the first and second light

source fixing parts

231 and 232 may be metal, such as aluminum alloy (a 6061), stainless steel (SUS 303), or the like. Meanwhile, in order to ensure that the second arc surface 2322 can rotate freely on the first arc surface 2311, the roughness of the joint of the formed spherical hinge connecting structure 300 is smaller than 1.6um, the joint of the spherical hinge is coated with heat conducting paste, the heat conducting coefficient of the heat conducting paste is larger than 8, the heat conducting paste plays a role in lubrication and heat conduction, and the heat dissipation of the optical module 200 can be improved. The components of the optical module 200 are in contact with each other, which is beneficial to guiding the heat generated by the light source 233 to the outside through heat conduction.

It can be understood that, in the present embodiment, the degree of freedom that needs to be adjusted in the process of assembling and adjusting the optical module 200 is split into the first guiding structure 260, the second guiding structure 270, the first screw pair 280, the second screw pair 290, the first coupling structure 250 between the connecting piece 240 and the light source assembly 230, the spherical hinge coupling structure 300, and the like, so that a plurality of components can be adjusted for different degrees of freedom, the difficulty in assembling and adjusting alignment among the components of the system is reduced, and the efficiency and accuracy of assembling and adjusting (especially manual assembling and adjusting) are improved.

The above description is only an embodiment of the present application and an illustration of the technical principles applied. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the technical idea. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. An optical module, comprising:

a light source assembly including a light source;

an optical assembly comprising a first lens in a light emission optical path of the light source; and

the adjusting component is provided with an adjusting part,

the adjusting part is used for adjusting at least one of the distance between the first lens and the light source component in the optical axis direction of the first lens, the position of the light source in a plane perpendicular to the optical axis direction, the inclination of the light source towards the direction perpendicular to the optical axis direction and the rotation of the light source around the optical axis direction.

2. The optical module of claim 1 wherein the adjustment portion comprises at least one of a threaded pair, a guide structure, and a ball and socket joint structure.

3. The optical module of claim 1, wherein the alignment assembly comprises:

a first barrel having an accommodation space, the first lens being disposed in the space of the first barrel; and

and one end of the connecting piece is connected to the first lens barrel, the other end of the connecting piece is connected to the light source component, and the first lens is positioned in a light emitting light path of the light source.

4. The optical module of claim 3, wherein the first barrel has a first thread structure, the connector has a second thread structure, and the first thread structure and the second thread structure are lockingly engaged to form a first thread pair such that the connector and the first barrel are connected by the first thread pair,

wherein the adjustment portion comprises the first thread pair,

the first thread pair is used for adjusting the distance between the first lens and the light source component in the optical axis direction of the first lens and limiting the inclination of the first lens towards the direction perpendicular to the optical axis direction.

5. The optical module of claim 4, wherein the connector and the first barrel form a first guiding structure by at least one of a smooth cambered fit or a flat fit,

wherein the adjustment portion includes the first guide structure,

the first guide structure is used for adjusting the distance between the first lens and the light source component in the optical axis direction of the first lens and limiting the inclination of the first lens towards the direction perpendicular to the optical axis direction.

6. The optical module of claim 3, wherein the light source module further comprises:

the first light source fixing part is connected with the connecting piece and is provided with a first arc surface, and the first arc surface is positioned on one side of the first light source fixing part, which is far away from the connecting piece; and

a second light source fixing part having a second arc surface fitted with the first arc surface so that the second light source fixing part forms a spherical hinge coupling structure with the first light source fixing part through smooth arc surface fitting,

wherein the adjusting part further comprises the spherical hinge coupling structure,

the spherical hinge coupling structure is used for adjusting the inclination of the light source towards the direction vertical to the optical axis direction and/or adjusting the rotation of the light source around the optical axis direction,

the light source is positioned on one side of the second light source fixing part facing the first lens and extends into the second light source fixing part.

7. The optical module of claim 4 wherein the optical assembly further comprises:

a second lens; and

the installation and adjustment assembly further comprises:

a second lens barrel having an accommodating space, the second lens being disposed in the accommodating space of the second lens barrel,

wherein the second barrel is connected to the first barrel such that the second lens is in a light emitting optical path of the light source.

8. The optical module of claim 7, wherein the first barrel further has a third thread structure, the second barrel further has a fourth thread structure, and the third thread structure and the fourth thread structure form a second thread pair such that the first barrel and the second barrel are connected by the second thread pair,

wherein the adjustment portion further comprises the second thread pair,

the second thread pair is used for adjusting the distance between the second lens and the light source component in the optical axis direction and limiting the inclination of the second lens towards the direction perpendicular to the optical axis direction.

9. The optical module of claim 8, wherein the first barrel and the second barrel form a second guiding structure by at least one of a smooth cambered fit or a flat fit,

wherein the adjustment portion further comprises the second guide structure,

the second guide structure is used for adjusting the distance between the second lens and the light source component in the optical axis direction of the second lens and limiting the inclination of the second lens towards the direction perpendicular to the optical axis direction.

10. The optical module of claim 6, wherein the first light source fixing portion and the connecting member are connected to each other by a first coupling structure, the first coupling structure including at least one of a screw connection structure and a soldering structure,

wherein the adjusting portion further includes the first coupling structure for defining a position of the light source within a plane perpendicular to the optical axis direction.

11. The optical module of claim 10, wherein a plane of the first light source fixing portion facing the first lens and a plane of the connector facing the second light source fixing portion are attached to each other in a state where the first light source fixing portion is connected to the connector.

12. The optical module of claim 3, wherein the maximum fit tolerance of the first barrel to the connector is 0.030mm.

13. The optical module of claim 9, wherein the maximum fit tolerance of the first barrel to the second barrel is 0.030mm.

14. The optical module of claim 5 wherein the first guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the direction of the optical axis.

15. The optical module of claim 9 wherein the second guide structure has a minimum length of 1.3mm and a maximum length of 3mm in the direction of the optical axis.

16. The optical module of claim 5, wherein the first portion of the connector and the first portion of the first barrel cooperate to form the first guiding structure, and wherein the first portion of the connector and the first portion of the first barrel are not coaxial more than 0.01mm.

17. The optical module of claim 9, wherein the second portion of the first barrel and the first portion of the second barrel cooperate to form the second guiding structure, and wherein the coaxiality of the second portion of the first barrel and the first portion of the second barrel is not more than 0.01mm.

18. The optical module of claim 6 wherein the first and second arcuate surfaces are segments of a spherical surface, the first arcuate surface lying on a sphere having a diameter that differs from the diameter of the second arcuate surface by no more than 0.1mm.

19. The optical module of claim 10 wherein the threaded connection includes at least one of a screw connection, a bolt connection, and a stud connection.

20. The optical module according to claim 8, wherein an adhesive is disposed between the first and second screw structures and between the third and fourth screw structures for fixing the relative positions of the first and second barrels and the connecting member, respectively.

21. The optical module of claim 6, wherein the second arcuate surface is secured to the first arcuate surface by a spot-on-fix.

22. The optical module as claimed in claim 6, wherein the light source is fixed to the second light source fixing portion by a spot-gluing method.

23. The optical module of claim 7 wherein the second lens comprises a plurality of lenses, and each of the plurality of lenses is in a light emission optical path of the light source.