Integrated coupling lens

Abstract

The utility model provides an integrated coupling lens which comprises a lens base body, the lens base body is provided with a light inlet face and a light outlet face, the light inlet face is provided with a plurality of spherical lenses arranged in an array mode, the lens base body is further provided with a reflecting face, the reflecting face is used for receiving light paths from all the spherical lenses and conducting total reflection on the light paths, and the reflecting face is used for reflecting the light paths from all the spherical lenses. The light-emitting surface is provided with a refraction plane used for refracting all paths of light which is totally reflected. The integrated coupling lens integrates an array lens and a reflecting prism on a traditional light path, a lens base body can be designed to be of a square structure, the side vertical angle of the lens base body is controllable, the assembling angle and the assembling position are easy to strictly control, meanwhile, the distance precision from a spherical lens of an array to a reflecting surface can be determined by means of an injection molding technology, and the precision of the distance between the spherical lens and the reflecting surface is improved. The problems that limiting from a traditional array silicon lens to a reflecting prism is difficult and the assembling tolerance of the reflecting prism is large are solved, the assembling technological process is greatly simplified, the assembling tolerance is reduced, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical device technology, and specifically relates to an integrated coupling lens. Background Technology

[0002] In recent years, the accelerated global digitalization process has driven explosive growth in applications such as online education, remote work, real-time video medical consultations, and large-scale live streaming. Simultaneously, the rapid development of AI has placed enormous demands on high computing power. These scenarios rely on high-bandwidth, low-latency data transmission capabilities, prompting data center switching capacity to rapidly iterate from 100G / 200G to 400G / 800G. To adapt to the demands of high-density fiber optic cabling, optical modules are evolving towards miniaturization, high integration, and ultra-high speed.

[0003] Against this backdrop, most CWDM module receivers currently adopt an outsourced integrated component solution or purchase loose components such as substrates, blocks, array silicon lenses, and reflective prisms to assemble themselves to complete wavelength division multiplexing. Both solutions require a large layout space and have very high assembly requirements. Utility Model Content

[0004] The purpose of this invention is to provide an integrated coupling lens that can at least solve some of the defects existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated coupling lens includes a lens substrate with an incident light surface and an exit light surface. The incident light surface is provided with a plurality of spherical lenses arranged in an array. The lens substrate is also provided with a reflecting surface for receiving the light paths from each of the spherical lenses and subjecting them to total internal reflection. The exit light surface is provided with a refractive plane for refracting the total internally reflected light paths.

[0007] Furthermore, the side of the lens substrate is provided with a first groove that is recessed inward therein, and the spherical lens is arranged in the first groove.

[0008] Furthermore, the spherical lens is provided with an anti-reflective coating.

[0009] Furthermore, the side of the lens substrate is provided with a second groove that is recessed inward therein, and the reflecting surface is located inside the second groove.

[0010] Furthermore, the reflective surface is arranged at an angle, and its angle of inclination is greater than Brewster's angle for total internal reflection of the material.

[0011] Furthermore, there is a vertical section between the upper end of the reflecting surface and the upper surface of the lens substrate, and a horizontal section between the lower end of the reflecting surface and the side end face of the lens substrate.

[0012] Furthermore, the bottom of the lens substrate is provided with a third groove that is recessed inward therein, and the refractive plane is located in the third groove.

[0013] Furthermore, the lens substrate is integrally injection molded from resin material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention provides an integrated coupling lens that combines a traditional optical array lens and a reflecting prism. The lens substrate can be designed as a square structure, allowing for controllable lateral tilt angles. The sides can directly adhere to the substrate sidewall, and the bottom can be placed directly on the substrate surface, facilitating strict control over assembly angles and positions. This solves the problem of large assembly tolerances in existing reflecting prisms. Furthermore, by relying on injection molding to determine the distance accuracy between the array's spherical lens and the reflecting surface, it solves the problem of difficult positioning of existing array silicon lenses to the reflecting prism. Through the structural design of this integrated coupling lens, the assembly process is greatly simplified, assembly tolerances are reduced, and manufacturing efficiency is improved.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first-view structure of the integrated coupling lens of this utility model;

[0018] Figure 2 This is a schematic diagram of the second-view structure of the integrated coupling lens of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal optical path transmission of the integrated coupling lens of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Lens substrate; 2. Spherical lens; 3. First groove; 4. Refractive plane; 5. Third groove; 6. Reflecting surface; 7. Second groove; 8. Vertical section; 9. Horizontal section; 10. Detector. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "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 accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides an integrated coupling lens, including a lens substrate 1. The lens substrate 1 has an incident light surface and an exit light surface. The incident light surface is provided with a plurality of spherical lenses 2 arranged in an array. The number of spherical lenses 2 corresponds one-to-one with the number of incident light paths, and the distance between each spherical lens 2 corresponds to the optical spacing between each light path. The spherical lenses 2 are used to converge the corresponding incident light paths. The lens substrate 1 is also provided with a reflective surface 6 for receiving the light paths converged from each of the spherical lenses 2 and performing total internal reflection on them. The exit light surface is provided with a refractive plane 4. Each light path that has been totally reflected by the reflective surface 6 is incident on the refractive plane 4. After refraction by the refractive plane 4, each refracted light is incident on a detector 10 outside the lens substrate 1. In this embodiment, by designing an array of spherical lenses 2, a reflecting surface 6, and a refractive plane 4 on the lens substrate 1, the array lenses and reflecting prisms in the traditional single-mode wavelength division multiplexing optical path are integrated onto a single lens substrate, which greatly simplifies the layout space. Moreover, the positional relationship between each spherical lens 2, reflecting surface 6, and refractive plane 4 on the lens substrate 1 is relatively fixed by design, which greatly simplifies the assembly process of the array lenses and reflecting prisms in the traditional single-mode wavelength division multiplexing optical path, reduces assembly tolerance, and improves product manufacturing efficiency.

[0026] Specifically, in this embodiment, the lens substrate 1 is integrally injection molded from PEI resin material, which can be mass-produced, greatly reducing costs and improving production efficiency; at the same time, the distance accuracy between the array spherical lens 2 and the reflecting surface 6 can be determined by the injection molding process, solving the problem of difficult positioning of the traditional array silicon lens to the reflecting prism.

[0027] In one specific implementation, the lens substrate 1 is designed in a roughly cuboid structure, which allows its lateral droop angle to be controlled, its side edges to be directly attached to the side wall of the mounting substrate, and its bottom to be placed directly on the surface of the mounting substrate. This makes it easy to strictly control the assembly angle and position, and solves the problem of large assembly tolerances in traditional reflective prisms.

[0028] In an optimized implementation, the lens substrate 1 has a first groove 3 recessed into its side, and the spherical lens 2 is arranged in the first groove 3. The sidewall of the first groove 3 surrounds the spherical lens 2, thus protecting the spherical lens 2.

[0029] Preferably, an anti-reflective coating can be provided on the spherical lens 2 to increase the optical power of the incident light entering the lens substrate 1.

[0030] In an optimized implementation, the lens substrate 1 has a second groove 7 recessed inward on its side surface. The reflecting surface 6 is located inside the second groove 7, and the reflecting surface 6 is surrounded by the sidewall of the second groove 7, thus protecting it. Specifically, in this embodiment, the second groove 7 is formed by the side of the lens substrate 1 opposite to the side where the spherical lens 2 is located, recessed inward. Furthermore, to facilitate the processing of the reflecting surface 6, the second groove 7 can be made to penetrate the upper surface of the lens substrate 1, meaning the upper surface of the lens substrate 1 is open at the second groove.

[0031] Specifically, the reflective surface 6 is arranged at an angle within the second groove 7, and its angle of inclination is greater than Brewster's angle for total internal reflection of the material, so as to ensure that the incident light is totally internally reflected at the reflective surface 6.

[0032] In an optimized configuration, a vertical section 8 is provided between the upper end of the reflective surface 6 and the upper surface of the lens substrate 1, and a horizontal section 9 is provided between the lower end of the reflective surface 6 and the side end face of the lens substrate 1. The design of the vertical section 8 and the horizontal section 9 ensures that there is a distance between the reflective surface 6 in the second groove 7 and the corresponding open side face of the lens substrate 1, thereby reducing the risk of damage to the reflective surface 6 caused by the open design and further improving the protection of the reflective surface 6.

[0033] In an optimized implementation, the bottom of the lens substrate 1 is provided with a third groove 5 that is recessed inward therein. The refractive plane 4 is located in the third groove 5. The sidewall of the third groove 5 surrounds the refractive plane 4, thus protecting it. At the same time, the design of the third groove 5 also leaves a space for light refraction between the refractive plane 4 and the bottom surface of the lens substrate 1, so that the bottom surface of the lens substrate 1 can be directly attached to the surface of the external component without the need for an additional support structure at the bottom of the lens substrate 1.

[0034] In summary, the integrated coupling lens provided by this invention integrates the array lens and reflecting prism in a traditional optical path. Furthermore, the lens substrate can be designed as a square structure, allowing for controllable lateral tilt angles. The sides can directly adhere to the substrate sidewall, and the bottom can be placed directly on the substrate surface, facilitating strict control over assembly angles and positions. This solves the problem of large assembly tolerances in existing reflecting prisms. Simultaneously, the injection molding process is used to determine the distance accuracy between the array's spherical lens and the reflecting surface, resolving the difficulty in positioning existing array silicon lenses to the reflecting prism. Through the structural design of this integrated coupling lens, the assembly process is greatly simplified, assembly tolerances are reduced, and manufacturing efficiency is improved.

[0035] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this invention.

Claims

1. An integrated coupling lens, characterized by: The lens includes a lens substrate with an incident light surface and an exit light surface. The incident light surface is provided with a plurality of spherical lenses arranged in an array. The lens substrate is also provided with a reflecting surface for receiving the light paths from each of the spherical lenses and subjecting them to total internal reflection. The exit light surface is provided with a refractive plane for refracting the total internally reflected light paths.

2. The integrated coupling lens of claim 1, wherein: The lens substrate has a first groove recessed into its side, and the spherical lens is arranged in the first groove.

3. The integrated coupling lens of claim 1, wherein: The spherical lens is provided with an anti-reflective coating.

4. The integrated coupling lens of claim 1, wherein: The lens substrate has a second groove recessed into its side, and the reflecting surface is located inside the second groove.

5. The integrated coupling lens of claim 4, wherein: The reflective surface is arranged at an angle greater than Brewster's angle for total internal reflection of the material.

6. The integrated coupling lens of claim 5, wherein: The upper end of the reflecting surface has a vertical section between it and the upper surface of the lens substrate, and the lower end of the reflecting surface has a horizontal section between it and the side end face of the lens substrate.

7. The integrated coupling lens of claim 1, wherein: The bottom of the lens substrate is provided with a third groove that is recessed inward therein, and the refractive plane is located in the third groove.

8. The integrated coupling lens of claim 1, wherein: The lens substrate is integrally injection molded from resin material.

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