A lens array assembly structure

Abstract

This invention relates to the field of optical element fabrication technology. The invention discloses a lens array assembly structure, comprising: a lens unit, including a lens unit body and first protrusions respectively fixed to the front and rear sides of the lens unit body; the lens unit body is a plano-convex cylindrical lens; and multiple lens units arranged in a left-right direction to form a first lens array; and a clamping tool, having a first through hole and a first groove, the first groove for accommodating the lower end of the first protrusions; incident light passes through the lens units sequentially from top to bottom and through the first through hole. By providing first protrusions on the front and rear sides of the lens unit body and cooperating with the first groove in the clamping tool, this invention can stably position each lens unit, allowing multiple lens units to be arranged to form a lens array, thereby ensuring the overall optical consistency and assembly accuracy of the array.

Description

Technical Field

[0001] This invention relates to the field of optical element fabrication technology, and in particular to a lens array assembly structure. Background Technology

[0002] Both traditional spherical and cylindrical microlens arrays are manufactured using mainstream technologies aimed at fabricating micrometer- or millimeter-sized arrays on a common substrate in a single process. This monolithic manufacturing paradigm reveals significant limitations when dealing with macroscopic lens arrays that require larger dimensions and flexible unit numbers. In existing technologies, the arrangement and number of units in the lens array are fixed during manufacturing, making it impossible to flexibly adjust or subsequently expand according to application needs. Summary of the Invention

[0003] The present invention aims to improve at least one technical problem in the prior art.

[0004] This invention provides a lens array assembly structure that enables the rapid and precise assembly of lens units into a lens array using clamping tools.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: it is a lens array assembly structure, comprising:

[0006] The lens unit includes a lens unit body and first protrusions fixed to the front and rear sides of the lens unit body respectively. The lens unit body is a plano-convex cylindrical lens. The upper surface of the lens unit body is convex, and the left, right and lower surfaces of the lens unit body are all planar. Multiple lens units are arranged and combined in the left-right direction to form a first lens array.

[0007] The clamping tool is provided with a first through hole and a first groove. The first groove is used to accommodate the lower end of the first protrusion. Incident light passes through the lens unit from top to bottom and through the first through hole.

[0008] As a further improvement to the above technical solution, the lens array assembly structure also includes a set screw, the bottom surface of the first groove is provided with a second through hole, the inner wall of the second through hole is provided with a thread, and the set screw is threadedly installed in the second through hole.

[0009] As a further improvement to the above technical solution, along the front-back direction, the ratio of the length of the first protrusion to the length of the lens unit body is greater than or equal to 0.05 and less than or equal to 0.1.

[0010] As a further improvement to the above technical solution, the lens unit body and the first protrusion are an integral structure.

[0011] As a further improvement to the above technical solution, the surface roughness of the left and right sides of the lens unit body is less than 1 nm.

[0012] As a further improvement to the above technical solution, the width of the first protrusion gradually increases from bottom to top.

[0013] As a further improvement to the above technical solution, the longitudinal section of the first protrusion is an isosceles trapezoid, and the lower base angle of the isosceles trapezoid is greater than or equal to 40° and less than or equal to 50°.

[0014] As a further improvement to the above technical solution, the lens array assembly structure further includes an optical adhesive layer, which is located between the first groove and the first protrusion.

[0015] As a further improvement to the above technical solution, the lens unit body is a plano-concave cylindrical lens, the upper surface of the lens unit body is concave, and the left, right and lower surfaces of the lens unit body are all planar.

[0016] The lens array assembly structure also includes multiple lens spacer units. Each lens spacer unit includes a lens spacer unit body and second protrusions respectively fixed to the front and rear sides of the lens spacer unit body. The lens spacer body is a quadrangular prism structure.

[0017] A plurality of lens units and a plurality of lens spacers are combined along the left-right direction to form a second lens array. In the second lens array, the lens units and the lens spacers are arranged sequentially at intervals, and the difference in the number of lens units and the number of lens spacers is 1.

[0018] The clamping tool is further provided with a second groove for accommodating the lower end of the second protrusion.

[0019] As a further improvement to the above technical solution, the height of the lens unit body is greater than the height of the lens spacer body in the vertical direction, and the length of the lens unit body is equal to the length of the lens spacer body in the front-back direction.

[0020] This technical solution has at least the following beneficial effects: By setting first protrusions on the front and rear sides of the lens unit body and setting first grooves in conjunction with the clamping tool, each lens unit can be stably positioned, allowing multiple lens units to be arranged to form a lens array, thereby ensuring the overall optical consistency and assembly accuracy of the array. Existing technologies process the lens array as a whole, which is difficult to manufacture and has low maintainability. In this technical solution, individual lens units can be manufactured independently, the process is simpler, and the quality is easier to control. Even if individual units are damaged during manufacturing or use, they can be replaced individually, avoiding overall scrapping and significantly reducing usage and maintenance costs. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is an isometric view of an embodiment of the lens array assembly structure of the present invention.

[0023] Figure 2 This is an axonometric view of an embodiment of the lens unit of the present invention;

[0024] Figure 3 This is an isometric view of an embodiment of the clamping tool of the present invention;

[0025] Figure 4 This is a top view of an embodiment of the clamping tool of the present invention;

[0026] Figure 5 This is an isometric view of an embodiment of the second lens array of the present invention.

[0027] In the attached figures: 1-lens unit; 11-first protrusion; 12-lens unit body; 2-clamping tool; 21-first through hole; 22-first groove; 23-second through hole; 3-lens spacer unit; 31-second protrusion; 32-lens spacer unit body. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following is combined Figures 1 to 5 Embodiments of the present invention will be described.

[0030] Reference Figures 1 to 3 This embodiment relates to a lens array assembly structure, including:

[0031] Lens unit 1, the lens unit 1 includes a lens unit body 12 and a first protrusion 11 fixed on the front side and rear side of the lens unit body 12 respectively. The lens unit body 12 is a plano-convex cylindrical lens. The upper surface of the lens unit body 12 is convex. The left side surface, right side surface and lower surface of the lens unit body 12 are all planar. Multiple lens units 1 are arranged and combined in the left-right direction to form a first lens array.

[0032] The clamping tool 2 is provided with a first through hole 21 and a first groove 22. The first groove 22 is used to accommodate the lower end of the first protrusion 11. The incident light passes through the lens unit 1 from top to bottom and passes through the first through hole 21.

[0033] In this embodiment, by providing first protrusions 11 on both the front and rear sides of the lens unit body 12 and cooperating with the clamping tool 2 to provide first grooves 22, each lens unit 1 can be stably positioned, allowing multiple lens units 1 to be arranged to form a lens array, thereby ensuring the overall optical consistency and assembly accuracy of the array. Existing technologies process the lens array as a whole, which is difficult to manufacture and has low maintainability. In this embodiment, each lens unit 1 can be manufactured independently, making the process simpler and the quality easier to control. Even if individual units are damaged during manufacturing or use, they can be replaced individually, avoiding overall scrapping and significantly reducing usage and maintenance costs. Specifically, during installation, the lens unit 1 is moved by the first protrusions 11 to avoid damage to the lens body. First, the lens unit 1 is placed above the clamping tool 2, aligning the position of the first protrusions 11 with the first grooves 22. Then, the lens unit 1 is installed in the clamping tool 2, with the first protrusions 11 inserted into the first grooves 22. Multiple lens units 1 are installed as needed, with the left and right sides of the multiple lens units 1 abutting against each other to form a lens array. The clamping tool 2 is CNC machined to ensure precision. The lens unit 1 is manufactured using mature single-lens manufacturing technology, undergoing major processes such as precision forming of the lens blank, precision grinding, rough polishing, surface modification, fine polishing, and optical coating. This process mass-produces lens units 1 with consistent optical performance and a precisely positioned first protrusion 11. In use, incident light passes through the lens unit body 12 from top to bottom and continues through the first through hole 21 in the clamping tool 2.

[0034] Reference Figure 4 In some embodiments, the lens array assembly structure further includes a set screw, the bottom surface of the first groove 22 is provided with a second through hole 23, the inner wall of the second through hole 23 is provided with threads, and the set screw is threadedly installed in the second through hole 23.

[0035] In this embodiment, by threading the set screw into the second through hole 23, the vertical position of the first protrusion 11 can be finely adjusted, making the installation height of the lens unit 1 in the clamping tool 2 more precise. This structure can effectively compensate for manufacturing tolerances and assembly errors, thereby further improving the optical axis consistency and optical path stability of the lens array. Specifically, the set screw is threaded into the second through hole 23, and the top of the set screw can press upward against the lower surface of the first protrusion 11 of the lens unit 1. By screwing the set screw, the pressing position can be adjusted, so that the height of the lens unit 1 in the clamping tool 2 can be finely adjusted.

[0036] Reference Figure 2In some embodiments, the ratio of the length of the first protrusion 11 to the length of the lens unit body 12 in the front-back direction is greater than or equal to 0.05 and less than or equal to 0.1.

[0037] In this embodiment, the front and rear dimensions of the first protrusion 11 are manufactured according to this ratio, so that it can meet the structural strength requirements without interfering with the optical path. This proportional design ensures installation stability and avoids obstruction of the optical transmission area, thereby improving the optical efficiency of the lens array.

[0038] In some embodiments, the lens unit body 12 and the first protrusion 11 are an integral structure.

[0039] In this embodiment, the lens unit body 12 and the first protrusion 11 adopt an integrated structure and are manufactured by integral molding, which avoids the connection error that may occur in spliced ​​structures, significantly improves the positioning accuracy of the lens unit 1 during the clamping process, and has higher overall structural strength, making it less prone to loosening or displacement, which helps to improve the reliability and durability of the lens array.

[0040] Reference Figure 2 In some embodiments, the surface roughness of the left and right sides of the lens unit body 12 is less than 1 nm.

[0041] In this embodiment, by controlling the surface roughness of the left and right sides of the lens unit body 12 to less than 1 nanometer, and processing it into an ultra-smooth optical reference surface, the influence of sidewall scattering on the optical path can be significantly reduced, the imaging quality and beam stability of the lens array can be improved, and the fitting accuracy during array assembly can be improved, making the positioning of the lens unit 1 in the clamping tool 2 more reliable.

[0042] Reference Figure 2 In some embodiments, the width of the first protrusion 11 gradually increases from bottom to top.

[0043] In this embodiment, the shape design of the first protrusion 11 can enhance the clamping stability, making the position of the lens unit 1 in the first groove 22 more stable, and the inclined surface can guide the adjacent first protrusion 11 to automatically slide into the correct position.

[0044] Reference Figure 2 In some embodiments, the longitudinal section of the first protrusion 11 is an isosceles trapezoid, wherein the lower base angle of the isosceles trapezoid is greater than or equal to 40° and less than or equal to 50°.

[0045] In this embodiment, the longitudinal section of the first protrusion 11 is an isosceles trapezoid, which can enhance the limiting ability between the first protrusion 11 and the first groove 22. The angle design of the isosceles trapezoid provides a higher resistance to lateral slippage, which helps to ensure that the position of the lens unit 1 in the array is not shifted, thereby maintaining the optical alignment accuracy of the lens array.

[0046] In some embodiments, the lens array assembly structure further includes an optical adhesive layer located between the first groove 22 and the first protrusion 11.

[0047] In this embodiment, an optical adhesive layer is filled between the inner wall of the first groove 22 and the outer wall of the first protrusion 11. The optical adhesive layer can further fix the protrusion, reducing displacement caused by temperature changes or mechanical vibration. At the same time, the optical adhesive layer can absorb minor assembly deviations, improving the tightness, thereby enhancing the overall structural stability and optical path consistency of the lens array. The optical adhesive can be a UV-curable adhesive, epoxy adhesive, or a special adhesive with high light transmittance, and is applied between the first protrusion 11 and the first groove 22 by dispensing or other methods.

[0048] Reference Figure 5 In some embodiments, the lens unit body 12 is a plano-concave cylindrical lens, the upper surface of the lens unit body 12 is concave, and the left, right and lower surfaces of the lens unit body 12 are all planar.

[0049] The lens array assembly structure also includes multiple lens spacer units 3. Each lens spacer unit 3 includes a lens spacer unit body 32 and a second protrusion 31 fixed to the front and rear sides of the lens spacer unit body 32, respectively. The lens spacer body is a quadrangular prism structure.

[0050] A plurality of lens units 1 and a plurality of lens spacer units 3 are combined in a left-right direction to form a second lens array. In the second lens array, the lens units 1 and the lens spacer units 3 are arranged sequentially at intervals, and the difference in the number of lens units 1 and lens spacer units 3 is 1.

[0051] The clamping tool 2 is also provided with a second groove, which is used to accommodate the lower end of the second protrusion 31.

[0052] In this embodiment, the plano-convex cylindrical lens is replaced with a plano-concave cylindrical lens, and lens spacer units 3 are set at intervals to form a second lens array, thereby realizing the linear convergence or collimation function of the incident beam. By setting the second groove to position the second protrusion 31, the mechanical positioning accuracy of the spacer unit is ensured, so that the overall structure of the array remains regular, thereby improving the imaging or beam adjustment performance of the array.

[0053] In some embodiments, the height of the lens unit body 12 is greater than the height of the lens spacer body 32 in the vertical direction, and the length of the lens unit body 12 is equal to the length of the lens spacer body 32 in the front-back direction.

[0054] Reference Figure 5 In this embodiment, the height of the lens unit body 12 is designed to be greater than the height of the lens spacer body 32. At the same time, the lengths of the lens unit body 12 and the lens spacer body 32 in the front-to-back direction are equal, so that the lens unit 1 and the lens spacer 3 are combined with a uniform length, making the second lens array structure stable. The height difference is used to realize the needs of optical path adjustment or beam shaping.

[0055] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.

[0056] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0057] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

Claims

1. A lens array assembly structure characterized by comprising: The lens array assembly structure comprises: a lens unit (1) comprising a lens unit body (12) and a first protrusion (11) fixed on the front side and the back side of the lens unit body (12) respectively, the lens unit body (12) is a plano-concave cylindrical lens, the upper surface of the lens unit body (12) is a concave surface, and the left side surface, the right side surface and the lower surface of the lens unit body (12) are all planar surfaces; the lens array assembly structure further comprises a plurality of lens spacing units (3), each lens spacing unit (3) comprising a lens spacing unit body (32) and a second protrusion (31) fixed on the front side and the back side of the lens spacing unit body (32) respectively, and the lens spacing unit body is a quadrangular prism structure; a plurality of the lens units (1) and a plurality of the lens spacing units (3) are combined to form a second lens array along the left-right direction, in which the lens units (1) and the lens spacing units (3) are arranged alternately, and the number difference between the lens units (1) and the lens spacing units (3) is 1; a clamping tool (2) provided with a first through hole (21) and a first groove (22), the first groove (22) being used for accommodating the lower end of the first protrusion (11), and incident light passing through the lens units (1) from top to bottom and then passing through the first through hole (21); the clamping tool (2) is further provided with a second groove, and the second groove is used for accommodating the lower end of the second protrusion (31).

2. The lens array assembly structure according to claim 1, characterized by: The lens array assembly structure further comprises a jackscrew, the bottom surface of the first groove (22) is provided with a second through hole (23), the inner wall of the second through hole (23) is provided with a screw thread, and the jackscrew is screwed into the second through hole (23).

3. The lens array assembly structure according to claim 1, characterized by: Along the front-back direction, the ratio of the length of the first protrusion (11) to the length of the lens unit body (12) is greater than or equal to 0.05 and less than or equal to 0.

1.

4. The lens array assembly structure according to claim 1, characterized by: The lens unit body (12) and the first protrusion (11) are of an integrated structure.

5. The lens array assembly structure according to claim 1, characterized by: The surface roughness of the left side surface and the right side surface of the lens unit body (12) is less than 1 nm.

6. The lens array assembly structure according to claim 1, characterized by: The width of the first protrusion (11) gradually increases from bottom to top.

7. The lens array assembly structure according to claim 1, characterized by: The longitudinal section of the first protrusion (11) is an isosceles trapezoid, the lower base angle of the isosceles trapezoid is greater than or equal to 40° and less than or equal to 50°.

8. The lens array assembly structure according to claim 1, characterized by: The lens array assembly structure further comprises an optical adhesive layer between the first groove (22) and the first protrusion (11).

9. The lens array assembly structure according to claim 1, characterized by: Along the up-down direction, the height of the lens unit body (12) is greater than the height of the lens spacing unit body (32), and along the front-back direction, the length of the lens unit body (12) is equal to the length of the lens spacing unit body (32).

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