Miniature multi-line laser module

Abstract

The utility model provides a miniature multi-line laser module. The miniature multi-line laser module comprises a laser, a collimating focus lens, a Powell prism and a diffractive optical element. The device further comprises an integrated middle seat and a shell. The integrated middle seat is provided with a first mounting position for mounting the transmitting end of the laser, the collimating focus lens and the Powell prism; and the shell is provided with a second mounting position for mounting the combination body of the integrated middle seat, the laser, the collimating focus lens and the Powell prism and the diffractive optical element. According to the miniature multi-line laser module provided by the utility model, each optical device is easier to install, the reduction of the overall size can be ensured, and the applicability is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of line spot modules, and in particular relates to a miniature multi-line laser module. Background Art

[0002] A multi-line laser module is a compact device that integrates a micro laser and related optical elements. It can generate multiple parallel laser lines to form a line spot. This module is often used in 3D scanning scenarios.

[0003] In the prior art, a multi-line laser module usually includes a laser and a variety of optical elements. In order to facilitate the installation of the laser and the various optical elements, a cylindrical holder for fixing them is respectively provided on the periphery of the laser and the various optical elements, and then each cylindrical holder is separately installed in the housing, and is usually connected with threads. This involves the linear propagation of light, and the independent installation of each optical element has high installation requirements, many parts, and is not easy to install. Moreover, this structure will increase the distance between each optical element and the distance from the optical element to the laser due to the addition of the cylindrical holder. In the 3D scanning scenario, due to the large size of the multi-line laser module, the size of the 3D scanner cannot be reduced again, which makes the size of the 3D scanning model also large. Moreover, in some special working environments, such as scanning in holes, scanning small parts, etc., the adaptability will deteriorate. Utility Model Content

[0004] The embodiment of the present utility model provides a miniature multi-line laser module, which aims to solve the problem that the existing multi-line laser module is difficult to install and has a large size.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a miniature multi-line laser module, including a laser, a collimating and focusing lens, a Powell prism and a diffractive optical element, and also including an integrated intermediate seat and a housing; the integrated intermediate seat has a first mounting position for placing the emitting end of the laser, the collimating and focusing lens and the Powell prism; the housing has a second mounting position for placing the combination of the integrated intermediate seat, the laser, the collimating and focusing lens and the Powell prism and the diffractive optical element.

[0006] In a possible implementation, the collimating and focusing lens is located between the Powell prism and the laser.

[0007] In one possible implementation, one end of the integrated intermediate seat is provided with a first stepped hole for placing the laser emitting end and the collimating and focusing lens, and the other end is provided with a slot for placing the Powell prism, and the first stepped hole is connected to the slot; the first stepped hole and the slot are combined to form the first mounting position.

[0008] In one possible implementation, the first stepped hole has a large-diameter portion and a small-diameter portion; the large-diameter portion of the first stepped hole is used to accommodate the laser emitting end; the small-diameter portion of the first stepped hole is connected to the slot and is used to accommodate the collimating focusing lens.

[0009] In a possible implementation, the integrated intermediate seat is a cylindrical structure, and the diameter of the integrated intermediate seat is smaller than the diameter of the laser tail end.

[0010] In one possible implementation, one end of the housing is provided with a second stepped hole for placing the combination of the integrated intermediate seat, the laser, the collimating focusing lens and the Powell prism, and the other end is provided with a placement groove for placing the diffraction optical element, and the second stepped hole is connected to the placement groove; the second stepped hole and the placement groove are combined to form the second mounting position.

[0011] In one possible implementation, the second stepped hole has a large-diameter portion and a small-diameter portion; the large-diameter portion of the second stepped hole is used to accommodate the laser tail end; the small-diameter portion of the second stepped hole is connected to the placement groove for accommodating the integrated intermediate seat.

[0012] In this implementation, the integrated intermediate mount ensures that the laser, collimating and focusing lens, and Powell prism are preferentially positioned in the first mounting position, reducing the number of parts and the spacing between them. The housing provides a second mounting position that ensures the placement of the integrated intermediate mount, laser, collimating and focusing lens, and Powell prism assembly, while also ensuring the placement of the diffractive optical element. This structure facilitates the installation of the various optical components while also minimizing the overall size and enhancing applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the explosion structure of a miniature multi-line laser module provided by an embodiment of the present utility model;

[0014] Figure 2 A schematic diagram of the structure of the assembly of a laser, a collimating and focusing lens, and a Powell prism in a miniature multi-line laser module provided by an embodiment of the present utility model;

[0015] Figure 3 A schematic cross-sectional view of a micro multi-line laser module according to an embodiment of the present invention;

[0016] Description of reference numerals:

[0017] 10. Laser; 20. Collimating focusing lens; 30. Powell prism; 40. Diffractive optical element; 50. Integrated intermediate seat; 51. First stepped hole; 60. Housing; 61. Second stepped hole. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Please also refer to Figures 1 to 3 The miniature multi-line laser module provided by the present invention is now described. The miniature multi-line laser module includes a laser 10, a collimating and focusing lens 20, a Powell prism 30, and a diffractive optical element 40. It also includes an integrated intermediate base 50 and a housing 60. The integrated intermediate base 50 has a first mounting position for the emission end of the laser 10, the collimating and focusing lens 20, and the Powell prism 30. The housing 60 has a second mounting position for the integrated intermediate base 50, the laser 10, the collimating and focusing lens 20, the Powell prism 30, and the diffractive optical element 40.

[0020] Compared to the prior art, the miniature multi-line laser module provided in this embodiment features an integrated intermediate base 50 that ensures that the laser 10, collimating and focusing lens 20, and Powell prism 30 are preferentially positioned in the first mounting position, reducing the number of components and the spacing between them. The housing 60 provides a second mounting position that ensures the placement of the integrated intermediate base 50, laser 10, collimating and focusing lens 20, and Powell prism 30, while also ensuring the placement of the diffractive optical element 40. This structure facilitates the installation of the various optical components while also minimizing the overall size and enhancing applicability.

[0021] This miniature multi-line laser module can effectively reduce the size of 3D scanners. In addition, this structure is not only used in 3D scanners, but can also be used in other devices that use line spot work.

[0022] In some embodiments, the collimating lens 20 and the Powell prism 30 can be used as follows: Figure 1 and Figure 2 The structure shown. Figure 1 and Figure 2 The collimating and focusing lens 20 is located between the Powell prism 30 and the laser 10 .

[0023] The laser 10 can be a diode laser 10, and the collimating and focusing lens 20 combines the functions of a collimating lens and a focusing lens, capable of both collimating the light beam and focusing it to a specific location. By precisely controlling the propagation path and focal point of the light beam, the performance and efficiency of the optical system are improved. The collimating and focusing lens 20 accurately transmits the light beam to the Powell prism 30, which is used to expand the laser beam into a uniform linear laser.

[0024] In addition, to further enhance understanding, optical diffraction elements can be used to split laser beams, turning one laser beam into multiple laser beams. This technology is existing and will not be described in detail here.

[0025] In some embodiments, the integrated intermediate seat 50 may be used as follows Figure 1 and Figure 2 The structure shown. Figure 1 and Figure 2 One end of the integrated intermediate seat 50 is provided with a first stepped hole 51 for accommodating the emitting end of the laser 10 and the collimating and focusing lens 20, and the other end is provided with a slot for accommodating the Powell prism 30. The first stepped hole 51 is connected to the slot. The first stepped hole 51 and the slot together form a first mounting position.

[0026] The provision of the first stepped hole 51 and the slot ensures that the collimating and focusing lens 20 and the Powell prism 30 are fixedly positioned at both ends of the integrated intermediate base 50, thereby reducing the difficulty of their placement and facilitating the precise and convenient installation of the optical components. The first stepped hole 51 can accommodate collimating and focusing lenses 20 and laser 10 emitters of varying sizes, thereby ensuring their axial position is fixed.

[0027] The Powell prism 30 typically has a pointed end, so the bottom of the slot can be tapered to fit the pointed end. The slot is connected to the small-diameter portion of the first stepped hole 51 via a connecting hole. The diameter of the connecting hole must be smaller than the diameter of the small-diameter portion of the first stepped hole 51.

[0028] In addition, in this embodiment, the emitting end of the laser 10 , the collimating and focusing lens 20 , and the Powell prism 30 can be bonded together using glue.

[0029] In some embodiments, the first stepped hole 51 may be formed as follows: Figure 1 and Figure 2 The structure shown. Figure 1 and Figure 2 The first stepped hole 51 has a large-diameter portion and a small-diameter portion. The large-diameter portion of the first stepped hole 51 can accommodate the emitting end of the laser 10. The small-diameter portion of the first stepped hole 51 is connected to the slot and can accommodate the collimating and focusing lens 20.

[0030] The small-diameter portion of the first stepped hole 51 is located inside the large-diameter portion thereof. This structure ensures that the collimating and focusing lens 20, which has a smaller diameter, can be placed in the small-diameter portion of the first stepped hole 51. Since the outer diameter of the emitting end of the laser 10 is generally larger than the diameter of the collimating and focusing lens 20, the emitting end of the laser 10 can be placed in the large-diameter portion of the first stepped hole 51.

[0031] In some embodiments, the integrated intermediate seat 50 may be used as follows Figure 1 and Figure 2 The structure shown. Figure 1 and Figure 2 The integrated intermediate seat 50 has a cylindrical outer structure, and the diameter of the integrated intermediate seat 50 is smaller than the diameter of the tail end of the laser 10.

[0032] The cylindrical integrated intermediate seat 50 is easy to manufacture and is also convenient for opening the first stepped hole 51 and the slot. The diameter of the emitting end of the laser 10 is usually smaller than the diameter of the tail end. Therefore, making the diameter of the integrated intermediate seat 50 smaller than the diameter of the tail end of the laser 10 can ensure that the size of the integrated intermediate seat 50 is reduced, and then the size of the outer shell 60 can be reduced. This effectively ensures that the overall size is reduced, the structure is simple, and it is also easy to connect and install.

[0033] In some embodiments, the housing 60 may be formed as follows: Figure 1 and Figure 3 The structure shown. Figure 1 and Figure 3 One end of the housing 60 is provided with a second stepped hole 61 for mounting the assembly of the integrated intermediate base 50, the laser 10, the collimating and focusing lens 20, and the Powell prism 30. The other end is provided with a placement groove for mounting the diffractive optical element 40. The second stepped hole 61 is connected to the placement groove. The second stepped hole 61 and the placement groove together form a second mounting position.

[0034] The second stepped hole 61 can ensure that the combination of the integrated intermediate seat 50, the laser 10, the collimating and focusing lens 20 and the Powell prism 30 can be placed, while the placement groove can ensure that the diffraction optical element 40 can be placed.

[0035] In this embodiment, the integrated intermediate seat 50 and the laser 10 can be bonded to the second stepped hole 61 by glue. The diffractive optical element 40 can be bonded to the mounting groove by glue, and the mounting groove can be a groove body adapted to the diffractive optical element 40.

[0036] In some embodiments, the second stepped hole 61 may be formed as follows: Figure 3 The structure shown. Figure 3The second stepped hole 61 has a large diameter portion and a small diameter portion. The large diameter portion of the second stepped hole 61 can accommodate the tail end of the laser 10. The small diameter portion of the second stepped hole 61 is connected to the placement groove and can accommodate the integrated intermediate seat 50.

[0037] An annular platform is formed between the large-diameter portion and the small-diameter portion of the second stepped hole 61, which can ensure that the laser 10 is limited in the length direction of the shell 60, thereby ensuring the stability of the assembly of the integrated intermediate seat 50, laser 10, collimating focusing lens 20 and Powell prism 30.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A miniature multi-line laser module, comprising a laser, a collimating focusing lens, a Powell prism and a diffractive optical element, characterized in that: It also includes an integrated intermediate seat and an outer shell; the integrated intermediate seat has a first mounting position for placing the emitting end of the laser, the collimating and focusing lens, and the Powell prism; the outer shell has a second mounting position for placing the combination of the integrated intermediate seat, the laser, the collimating and focusing lens, the Powell prism, and the diffraction optical element.

2. The micro multi-line laser module according to claim 1, wherein: The collimating and focusing lens is located between the Powell prism and the laser.

3. The micro multi-line laser module according to claim 2, wherein: One end of the integrated intermediate seat is provided with a first stepped hole for accommodating the laser emitting end and the collimating and focusing lens, and the other end is provided with a slot for accommodating the Powell prism, and the first stepped hole is connected to the slot; the first stepped hole and the slot are combined to form the first mounting position.

4. The micro multi-line laser module according to claim 3, wherein: The first stepped hole has a large-diameter portion and a small-diameter portion; the large-diameter portion of the first stepped hole is used to accommodate the laser emitting end; the small-diameter portion of the first stepped hole is connected to the slot and is used to accommodate the collimating focusing lens.

5. The micro multi-line laser module according to any one of claims 1 to 4, characterized in that: The integrated intermediate seat is a cylindrical structure, and the diameter of the integrated intermediate seat is smaller than the diameter of the tail end of the laser.

6. The micro multi-line laser module according to claim 5, wherein: One end of the housing is provided with a second stepped hole for placing the combination of the integrated intermediate seat, the laser, the collimating focusing lens and the Powell prism, and the other end is provided with a placement groove for placing the diffraction optical element, and the second stepped hole is connected to the placement groove; the second stepped hole and the placement groove are combined to form the second mounting position.

7. The micro multi-line laser module according to claim 6, wherein: The second stepped hole has a large-diameter portion and a small-diameter portion; the large-diameter portion of the second stepped hole is used for accommodating the tail end of the laser; the small-diameter portion of the second stepped hole is connected to the placement groove for accommodating the integrated intermediate seat.

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