Miniature linear light spot module and 3D scanning equipment

Abstract

The utility model provides a miniature linear light spot module and 3D scanning equipment. The miniature linear light spot module comprises a laser compression ring, a laser diode, a first bearing part, a collimating focus lens, a second bearing part, a linear light spot shaping lens and a shell which are coaxially assembled in sequence, a first inner circular groove, a second inner circular groove and a third inner circular groove are formed in the first bearing part; the first inner circular groove is used for fixing a laser diode; the third inner circular groove is used for fixing a second bearing part; the second inner circular groove is used for fixing the collimating focus lens; a fourth inner circular groove and a fifth inner circular groove are formed in the second bearing part; the fourth inner circular groove is used for being matched with the second inner circular groove to fix the collimating focus lens. The fifth inner circular groove is used for fixing a linear light spot shaping lens; and the laser diode, the first bearing piece and the second bearing piece are packaged by the laser compression ring and the shell. According to the invention, the overall size of the module is effectively reduced, high integration is realized, and meanwhile, the stability and accuracy of optical path transmission are ensured.

Description

Technical Field

[0001] This application belongs to the field of 3D scanning technology, and particularly relates to a micro linear light spot module and a 3D scanning device. Background Art

[0002] In the current application of 3D scanning technology, a significant technical bottleneck is the inherent volume of the linear light spot module, which hinders the further miniaturization and lightweight process of 3D scanning devices. Therefore, existing 3D scanning models are often large in size and heavy in weight, which is particularly inconvenient in specific application scenarios such as fine scanning inside holes and scanning of small objects, greatly limiting their application scope and popularity.

[0003] Specifically at the structural design level, the current practice is to install key components such as lasers and lenses separately and assemble them into an overall module through relatively traditional methods such as threaded connections. This design not only leads to a significant increase in the overall volume of the module, lacking the necessary compactness, but also makes the entire installation process complex and cumbersome, involving precise alignment and fixation of numerous components, further increasing the cost and difficulty of manufacturing and maintenance.

[0004] Due to the non-reducibility of the volume of the linear light spot module and the non-optimization of the existing structural design, current 3D scanning devices face many challenges in terms of miniaturization, portability, and application in specific fields, and urgently require technological innovation and structural optimization to break through these limitations. Summary of the Utility Model

[0005] To overcome the problems existing in the related technologies, the embodiments of this application provide a micro linear light spot module and a 3D scanning device, effectively reducing the overall size of the module, achieving a high degree of integration, and at the same time ensuring the stability and accuracy of the optical path transmission.

[0006] This application is implemented through the following technical solutions:

[0007] In a first aspect, the embodiments of this application provide a micro linear light spot module, including a laser retainer ring, a laser diode, a first carrier, a collimating and focusing lens, a second carrier, a linear light spot shaping mirror, and a housing, which are coaxially assembled in sequence;

[0008] Inside the first carrier, there are a first inner circular groove, a second inner circular groove, and a third inner circular groove; the first inner circular groove is located on the side close to the laser diode and is used to fix the laser diode; the third inner circular groove is located on the side close to the linear light spot shaping mirror and is used to fix the second carrier; the second inner circular groove is located between the first inner circular groove and the third inner circular groove and is used to fix the collimating and focusing lens;

[0009] Inside the second carrier, a fourth inner circular groove and a fifth inner circular groove are provided; the fourth inner circular groove is located on the side close to the laser diode and is used to cooperate with the second inner circular groove to fix the collimating and focusing lens; the fifth inner circular groove is located on the side close to the housing and is used to fix the line spot shaping lens.

[0010] The laser diode, the first carrier and the second carrier are encapsulated by the laser press ring and the housing.

[0011] In one embodiment, the inner diameter of the first inner circular groove is the same as the outer diameter of the cap of the laser diode; the cap of the laser diode is fitted with the first inner circular groove to fix the laser diode.

[0012] The inner diameter of the second inner circular groove is the same as the outer diameter of the cylindrical part of the collimating and focusing lens; the collimating and focusing lens includes a spherical part and a cylindrical part; the width of the second inner circular groove is the same as the width of the cylindrical part of the collimating and focusing lens; the spherical part of the collimating and focusing lens is located in the third inner circular groove.

[0013] The inner diameter of the third inner circular groove is larger than the inner diameter of the second inner circular groove; the inner diameter of the first inner circular groove is larger than the inner diameter of the second inner circular groove.

[0014] In one embodiment, the inner diameter of the fourth inner circular groove is smaller than the outer diameter of the cylindrical part of the collimating and focusing lens, and the fourth inner circular groove presses on the spherical part of the collimating and focusing lens.

[0015] The inner diameter of the fifth inner circular groove is the same as the outer diameter of the line spot shaping lens.

[0016] In one embodiment, the outer diameter of the cylinder where the fourth inner circular groove is located is less than or equal to the inner diameter of the third inner circular groove.

[0017] In one embodiment, the line spot shaping lens is a Powell prism.

[0018] In one embodiment, a diaphragm hole is provided on the second carrier, and the diaphragm hole is coaxial with the fifth inner circular groove; the front end of the line spot shaping lens is fixed in the diaphragm hole.

[0019] In one embodiment, the laser press ring, the laser diode, the first carrier, the collimating and focusing lens, the second carrier, the line spot shaping lens and the housing are all symmetric parts.

[0020] In one embodiment, female buckles are symmetrically arranged on the outside of the first carrier, and male buckles are symmetrically arranged on the outside of the second carrier, and the female buckles and the male buckles form a snap structure.

[0021] In one embodiment, the housing is a stepped cylindrical structure, including a first cylinder and a second cylinder; the outer diameter of the first cylinder is smaller than the outer diameter of the second cylinder.

[0022] The laser press ring and the first cylinder cooperate to encapsulate the laser diode, the first carrier and the second carrier.

[0023] In a second aspect, an embodiment of the present application provides a 3D scanning device, which applies the micro linear light spot module as described in the first aspect.

[0024] The beneficial effects of the embodiments of the present application compared with the prior art are as follows:

[0025] In the embodiments of the present application, by coaxially assembling components such as a laser press ring, a laser diode, a first carrier, a collimating and focusing lens, a second carrier, a linear light spot shaping mirror, and a housing, the overall size of the module is effectively reduced, high integration is achieved, and at the same time, the stability and accuracy of the optical path transmission are ensured, the loss and deviation of light during transmission are reduced, and the quality of the light spot is improved. First, use the first carrier and the second carrier to install and fix each optical element, and then use the secondary packaging of the laser press ring and the housing. Since the cap structure is relatively thin, using an external structure to protect the cap structure again not only protects the internal optical elements from the influence of the external environment, but also improves the seismic resistance and durability of the module. At the same time, the structure is more concise, making the volume of the overall sensor module more compact and enabling it to be used in some special fields; after the laser and the optical path are integrated into a whole, it can be used as a basic module.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 is an axonometric exploded view of a micro linear light spot module provided by an embodiment of the present application;

[0029] Figure 2 is an internal exploded view of a micro linear light spot module provided by an embodiment of the present application;

[0030] Figure 3 is a front internal view of a micro linear light spot module provided by an embodiment of the present application;

[0031] Figure 4 is provided by an embodiment of the present application Figure 3 top view;

[0032] Figure 5 is provided by an embodiment of the present application Figure 3 left view;

[0033] Figure 6 is a front view of a micro linear light spot module provided by an embodiment of the present application;

[0034] Figure 7 is a schematic diagram of the linear light spot formed by the micro linear light spot module provided by an embodiment of the present application. Detailed implementation manners

[0035] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0036] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0037] It should also be understood that the term "and / or" used in the specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0038] As used in the specification of the present application and the appended claims, the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In addition, in the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0040] References to "one embodiment" or "some embodiments" in the description of this application mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0041] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0042] Figure 1 is an axonometric exploded view of a micro linear light spot module provided by an embodiment of this application, Figure 2 is an exploded view of the inside of a micro linear light spot module provided by an embodiment of this application, Figure 3 is a front view of the inside of a micro linear light spot module provided by an embodiment of this application, Figure 4 is provided by an embodiment of this application Figure 3 top view of Figure 5 is provided by an embodiment of this application Figure 3 left view of Figure 6 is a front view of a micro linear light spot module provided by an embodiment of this application, Figure 7 is a schematic diagram of the linear light spot formed by the micro linear light spot module provided by an embodiment of this application. Referring to Figures 1 to 7 , the micro linear light spot module includes a laser retainer ring 100, a laser diode 200, a first carrier 300, a collimating and focusing lens 400, a second carrier 500, a linear light spot shaping lens 600, and a housing 700 that are coaxially assembled in sequence.

[0043] Exemplarily, the collimating and focusing lens 400 is used to collimate and focus the light emitted by the laser diode 200, and then the collimated light spot is shaped into a linear light spot by the linear light spot shaping lens 600.

[0044] A first inner circular groove H1, a second inner circular groove H2, and a third inner circular groove H3 are provided inside the first carrier 300; the first inner circular groove H1 is located on the side close to the laser diode 200 and is used to fix the laser diode 200; the third inner circular groove H3 is located on the side close to the linear light spot shaping lens 600 and is used to fix the second carrier 500; the second inner circular groove H2 is located between the first inner circular groove H1 and the third inner circular groove H3 and is used to fix the collimating and focusing lens 400.

[0045] Inside the second carrier 500, a fourth inner circular groove H4 and a fifth inner circular groove H5 are provided; the fourth inner circular groove H4 is located on the side close to the laser diode 200 and is used to cooperate with the second inner circular groove H2 to fix the collimating and focusing lens 400; the fifth inner circular groove H5 is located on the side close to the housing 700 and is used to fix the line spot shaping lens 600.

[0046] The laser press ring 100 and the housing 700 encapsulate the laser diode 200, the first carrier 300, and the second carrier 500.

[0047] In this embodiment, by coaxially assembling (the entire module has a unified center line) each component of the laser press ring 100, the laser diode 200, the first carrier 300, the collimating and focusing lens 400, the second carrier 500, the line spot shaping lens 600, and the housing 700, the overall size of the module is effectively reduced, realizing a high degree of integration. At the same time, the stability and accuracy of the optical path transmission are ensured, reducing the loss and deviation of light during transmission and improving the quality of the light spot. First, use the first carrier 300 and the second carrier 500 to install and fix each optical element, and then use the secondary encapsulation of the laser press ring 100 and the housing 700. Because the cap structure itself is relatively thin, using an external structure to protect the cap structure again not only protects the internal optical elements from the influence of the external environment, but also improves the seismic resistance and durability of the module. At the same time, the structure is more concise, making the volume of the overall sensor module more compact and enabling it to be used in some special fields; after the laser and the optical path are integrated into a whole, it can be used as a basic module.

[0048] In one embodiment, the inner diameter of the first inner circular groove H1 is the same as the outer diameter L1 of the cap of the laser diode 200; the cap of the laser diode 200 is fixed to the first inner circular groove H1 to cooperate and fix the laser diode 200.

[0049] It should be noted that, for the sake of clear and concise expression, in this embodiment, each inner circular groove and the inner diameter of each inner circular groove are represented by the same symbol. For example, H1 indicates the first inner circular groove and represents the inner diameter size of the first inner circular groove.

[0050] The inner diameter of the second inner circular groove H2 is the same as the outer diameter L2 of the cylindrical part of the collimating and focusing lens 400, and the collimating and focusing lens 400 is placed in the second inner circular groove H2; the collimating and focusing lens 400 includes a spherical part and a cylindrical part; the width W1 of the second inner circular groove H2 is the same as the width W2 of the cylindrical part of the collimating and focusing lens 400; the spherical part of the collimating and focusing lens 400 is located in the third inner circular groove H3.

[0051] The inner diameter of the third inner circular groove H3 is greater than the inner diameter of the second inner circular groove H2; the inner diameter of the first inner circular groove H1 is greater than the inner diameter of the second inner circular groove H2.

[0052] In one embodiment, the inner diameter of the fourth inner circular groove H4 is smaller than the outer diameter of the cylindrical portion of the collimating focusing mirror 400, the outer diameter L3 of the cylinder where the fourth inner circular groove H4 is located is larger than the outer diameter L2 of the cylindrical portion of the collimating focusing mirror 400, and the fourth inner circular groove H4 presses on the spherical portion of the collimating focusing mirror 400.

[0053] The inner diameter of the fifth inner circular groove H5 is the same as the outer diameter L4 of the line spot shaping mirror 600.

[0054] Exemplarily, the installation of the line spot shaping mirror 600 has extremely high requirements for position and also has relatively high requirements for the size of the incident light spot. Now, the line spot shaping mirror 600 is matched one-to-one with the collimating focusing mirror 400, and suitable bearing spaces are designed for the line spot shaping mirror 600 and the collimating focusing mirror 400 respectively to prevent deviation. After that, the laser is installed, and after adjusting the light spot, in the subsequent assembly process by the customer, the flexibility is higher, and there is no need to consider too many assembly difficulty factors and structural interference factors.

[0055] In one embodiment, the outer diameter L3 of the cylinder where the fourth inner circular groove H4 is located is less than or equal to the inner diameter of the third inner circular groove H3.

[0056] In one embodiment, the line spot shaping mirror 600 is a Powell prism. The Powell prism can convert the laser beam into a linear beam with uniform light density and good stability. The generated linear beam has excellent linearity, which is crucial for a scanning system that requires precise linear positioning.

[0057] In one embodiment, a diaphragm hole 501 is provided on the second carrier 500, and the diaphragm hole 501 is coaxial with the fifth inner circular groove H5; the front end of the line spot shaping mirror 600 is fixed in the diaphragm hole 501.

[0058] In one embodiment, the laser holder 100, the laser diode 200, the first carrier 300, the collimating focusing mirror 400, the second carrier 500, the line spot shaping mirror 600, and the housing 700 are all symmetric parts.

[0059] Exemplarily, as Figure 3 and Figure 5 shown, the center lines where the two pins of the laser diode 200 are located are symmetrically arranged on both sides of the center line of the entire module (the center line of the entire module coincides with the optical axis of the entire module). Two V-shaped opening grooves and a first rectangular groove are provided on the base that connects the two pins of the laser diode 200 to the cap, all of which are used for fixing with the laser holder 100.

[0060] Second rectangular grooves are symmetrically provided around the first carrier 300 and the second carrier 500. After the first carrier 300 and the second carrier 500 fix the laser diode 200, the collimating and focusing mirror 400, and the line spot shaping mirror 600, the whole is assembled into the housing 600 through the second rectangular grooves for fixation. Then, the laser press ring 100 and the housing 600 are integrally encapsulated to form the entire micro line spot module, as Figure 6 shown.

[0061] In one embodiment, female fasteners are symmetrically arranged on the outer side of the first carrier 300, and male fasteners are symmetrically arranged on the outer side of the second carrier 500. The female fasteners and the male fasteners form a snap structure. The connection and fixation are realized through the cooperation of the male fasteners and the female fasteners, improving the convenience of assembly and ensuring the stability of the connection at the same time.

[0062] In one embodiment, the housing 700 is a stepped cylindrical structure, including a first cylinder and a second cylinder, as Figure 6 shown; the outer diameter of the first cylinder is smaller than the outer diameter of the second cylinder.

[0063] The laser press ring 100 and the first cylinder cooperate to encapsulate the laser diode 200, the first carrier 300, and the second carrier 500.

[0064] It can be seen that for a micro line spot module of the present utility model, by connecting each component coaxially, the overall size of the module is significantly reduced, realizing a high degree of integration. This design makes the module more compact, facilitating installation and use in a limited space, and is particularly suitable for some special fields with strict requirements on volume. This design ensures the stability and accuracy of the optical path transmission, reduces the loss and deviation of light during transmission, and thus improves the quality of the light spot. This is particularly important for application scenarios that require high-precision light spots, such as laser scanning.

[0065] Using the carrier for primary encapsulation and using the laser press ring and the housing for secondary encapsulation not only protects the internal optical components from the external environment but also improves the seismic resistance and durability of the module. This design extends the service life of the module and reduces the performance degradation caused by external environmental factors.

[0066] By designing a suitable bearing space for the line spot shaping mirror and the collimating and focusing mirror and performing one-to-one matching, the spot position can be flexibly adjusted during the assembly process, reducing the assembly difficulty and the risk of structural interference. This provides higher flexibility for customers and allows for customized adjustment according to actual needs.

[0067] Using a Powell prism as a line spot shaper, the laser beam can be converted into a straight beam with uniform light density and good stability. This beam has excellent straightness, which is crucial for scanning systems that require precise straight-line positioning. The first carrier and the second carrier are connected and fixed through a snap structure, which improves the assembly convenience and ensures the connection stability. This design reduces the assembly difficulty and cost, and improves the production efficiency. The overall design structure is concise, reducing unnecessary components and complexity, thereby reducing the manufacturing cost. At the same time, the compact structure also makes the module more portable and easy to carry, facilitating transportation and installation.

[0068] In one embodiment, the present application provides a 3D scanning device that applies the micro line spot module as described in the above embodiment.

[0069] The micro line spot module with high precision and high stability can ensure the accuracy and reliability of the scanning data, thereby improving the scanning quality and providing strong support for subsequent data processing and analysis. The fast scanning and flexible adjustment methods enable the 3D scanning device to complete tasks faster and improve work efficiency. In addition, the compact structure also facilitates the rapid deployment and movement of the device in different scenarios. Due to the characteristics of high precision, high stability and flexibility of the module, the 3D scanning device can be applied to more application scenarios, such as cultural relic protection, e-commerce, 3D printing, industrial inspection and the metaverse. The application of the micro line spot module can promote the continuous innovation and development of 3D scanning technology, providing new ideas and methods for the research and application in related fields.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A micro line spot module, characterized in that: It includes a laser pressure ring, a laser diode, a first bearing member, a collimating and focusing lens, a second bearing member, a line spot shaping lens and a housing which are coaxially assembled in sequence; A first inner circular groove, a second inner circular groove and a third inner circular groove are arranged inside the first carrier; the first inner circular groove is located on a side close to the laser diode and is used to fix the laser diode; the third inner circular groove is located on a side close to the line spot shaping lens and is used to fix the second carrier; the second inner circular groove is located between the first inner circular groove and the third inner circular groove and is used to fix the collimating and focusing lens; A fourth inner circular groove and a fifth inner circular groove are provided inside the second carrier; the fourth inner circular groove is located on a side close to the laser diode and is used to cooperate with the second inner circular groove to fix the collimating and focusing lens; the fifth inner circular groove is located on a side close to the housing and is used to fix the line spot shaping lens; The laser pressure ring and the housing encapsulate the laser diode, the first carrier and the second carrier.

2. The micro linear spot module according to claim 1, characterized in that: The inner diameter of the first inner circular groove is the same as the outer diameter of the tube cap of the laser diode; the tube cap of the laser diode cooperates with the first inner circular groove to fix the laser diode; The inner diameter of the second inner circular groove is the same as the outer diameter of the cylindrical part of the collimating and focusing mirror; the collimating and focusing mirror includes a spherical part and a cylindrical part; the width of the second inner circular groove is the same as the width of the cylindrical part of the collimating and focusing mirror; the spherical part of the collimating and focusing mirror is located in the third inner circular groove; The inner diameter of the third inner circular groove is larger than the inner diameter of the second inner circular groove; the inner diameter of the first inner circular groove is larger than the inner diameter of the second inner circular groove.

3. The micro linear spot module according to claim 1, characterized in that: The inner diameter of the fourth inner circular groove is smaller than the outer diameter of the cylindrical portion of the collimating and focusing lens, and the fourth inner circular groove is pressed on the spherical portion of the collimating and focusing lens; The inner diameter of the fifth inner circular groove is the same as the outer diameter of the linear spot shaping mirror.

4. The micro linear spot module according to claim 1, characterized in that: The outer diameter of the cylinder where the fourth inner circular groove is located is smaller than or equal to the inner diameter of the third inner circular groove.

5. The micro linear spot module according to claim 1, characterized in that: The line spot shaping mirror is a Powell prism.

6. The micro linear spot module according to claim 1, characterized in that: The second carrier is provided with an aperture hole, which is coaxial with the fifth inner circular groove; the front end of the line spot shaping mirror is fixed in the aperture hole.

7. The micro linear spot module according to any one of claims 1 to 6, characterized in that: The laser pressure ring, the laser diode, the first carrier, the collimating and focusing mirror, the second carrier, the line spot shaping mirror and the housing are all symmetrical parts.

8. The micro linear spot module according to any one of claims 1 to 6, characterized in that: The outer side of the first bearing member is symmetrically provided with female buckles, and the outer side of the second bearing member is symmetrically provided with male buckles, and the female buckles and the male buckles form a snap-fit ​​structure.

9. The micro linear spot module according to any one of claims 1 to 6, characterized in that: The housing is a stepped cylindrical structure, comprising a first cylinder and a second cylinder; the outer diameter of the first cylinder is smaller than the outer diameter of the second cylinder; The laser pressure ring and the first cylinder cooperate to package the laser diode, the first carrier and the second carrier.

10. A 3D scanning device, characterized in that: A micro linear spot module as described in any one of claims 1 to 9 is used.

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