A modular assembly lens

Abstract

This utility model discloses a modularly assembled lens, comprising a first lens barrel assembly, a second lens barrel assembly, and an aperture structure assembly. The lens barrel assembly can be fitted with double cemented positive lenses to form a first lens group, or serve as a lensless mounting tube; multiple first lens barrel assemblies can be freely combined and matched; the aperture assembly has threads at both ends adapted to the lens barrel, and a built-in aperture controls the amount of light entering and the depth of field; based on the above components, three types of lenses can be assembled: a mounting tube, aperture, and second lens group to achieve a standard 100mm focal length; two lens groups and an aperture to form a short-focal-length symmetrical lens with a focal length <200mm; and two second lens groups, an aperture, a mounting tube, and a first lens to form a multi-lens fine-tuning short-focal-length lens with a focal length <300mm. The lens is fixed by a clamping ring to ensure coaxial stability, and a convex ring on the first lens barrel can connect to external components, making it suitable for photography, optics teaching, and science popularization scenarios.

Description

Technical Field

[0001] This utility model relates to the field of photographic lenses, specifically to a modular assembly lens. Background Technology

[0002] In the field of optical imaging, the lens, as a core optical component, directly determines image quality, application scenarios, and the range of applicable users through its structural design. Currently, existing optical lenses, depending on their application scenarios, mainly face the following technical status and problems:

[0003] Currently, photography enthusiasts and professional photographers need to equip themselves with separate prime lenses of different focal lengths to meet the needs of different shooting scenarios, such as everyday framing, wide-angle landscape shooting, and close-up shooting. The focal length and optical parameters of integrated lenses are fixed at the factory, which usually requires carrying and configuring lenses of different focal lengths; while zoom lenses have been developed, they are usually bulky and heavy, and cannot be disassembled.

[0004] In optical education, existing teaching lenses are primarily used to demonstrate basic optical knowledge such as lens imaging principles and the effect of aperture on imaging. However, their technical solutions have significant limitations: Most existing teaching aids are fixed structures (e.g., integrating the lens with the lens barrel) or only provide static displays of a single lens group. Students cannot observe the effects of changes in the number of lenses, lens spacing, and aperture size on imaging by disassembling and reassembling components. They can only understand optical principles through formula derivation (e.g., the formula for calculating the focal length of a lens group), making it difficult to visualize abstract theories and resulting in poor teaching effectiveness. Traditional teaching aids cannot conduct comparative experiments with different component combinations (e.g., comparing the imaging differences between a single lens and two lenses, or the effect of the presence or absence of an extension tube on focal length). Students cannot verify optical laws through hands-on operation. Furthermore, the teaching aids are limited in function, only demonstrating a single knowledge point, failing to meet the needs of multi-dimensional optical principle teaching and restricting the expansion of teaching scenarios. Existing popular science lenses struggle to balance the relationship between cost, image quality, and safety.

[0005] In summary, existing optical lenses have significant technical shortcomings in terms of portability, functionality, adaptability for teaching, applicability to popular science, and scalability. They cannot meet the needs of photography, education, popular science, and general optical equipment for low-cost, highly flexible, easy-to-operate, and expandable lens structures. Therefore, there is an urgent need for a new lens structure that can solve the above problems. Summary of the Invention

[0006] To address the aforementioned issues, this utility model provides a modular assembly lens, aiming to break through the limitations of traditional lenses' single function and fixed form through modular design. It offers a low-cost, highly adaptable lens solution for three core scenarios: photography enthusiasts, optical education, and optical science popularization. With "low cost, high flexibility, and ease of operation" as its core principles, and through designs that "mechanical modularization ensures accuracy," "optical combination enables multiple focal lengths," and "standardized interfaces expand functionality," it solves the traditional pain points of "multiple lens burden" in photography, "theoretical abstraction" in education, and "high barriers to entry" in science popularization. Furthermore, it provides a new direction for the "lightweighting, reusability, and scenario-based application" of optical equipment, possessing both practical value and technological innovation significance.

[0007] The working principle of this utility model is as follows: The lens assembly in this utility model is a double cemented positive lens. After the diverging light rays from the object side pass through the positive lens, they will be deflected in the direction of the optical axis and finally form a real image on the image side (which is imaged on the photosensitive element during photography). The bonding of the two lenses can eliminate the "chromatic aberration" of a single lens, that is, eliminate the color fringing caused by the different refraction angles of different wavelengths of light, and improve the image clarity. The aperture is located in the middle of the optical system of the assembled lens barrel. The first lens barrel assembly, multiple sets of second lens barrel assemblies, and one aperture assembly are connected by threaded connections, limiting rings, and fixing rings to ensure strict alignment of the optical axes of all lenses and apertures, providing a foundation for clear imaging. Centered on a 100mm cemented doublet positive lens, the combined focal length of the lens group can be changed by adding or removing lenses (e.g., 1, 2, 3) and adjusting the lens spacing in the connecting tube assembly. This allows for multi-scene adaptation from standard focal length to short focal length to finely adjustable short focal length. Simultaneously, the centrally located aperture controls the amount of light and depth of field, ensuring image quality. Furthermore, the convex ring interface on the first lens barrel can connect to external components such as zoom tubes, further extending the focal length adjustment capability and adapting to different shooting equipment. Combining the portability of "modular assembly and disassembly" and the multi-functionality of "multi-focal length combination," this lens ultimately meets the needs of photography enthusiasts, optical education, science popularization, and other scenarios.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] (1) Compact size and flexible portability. This utility model realizes the combination of multiple focal length lenses through multiple combinations of individual modules. Due to the lightweight and small size and weight of the single device, photography enthusiasts do not need to carry heavy equipment. They can switch between standard focal length (100mm), short focal length (such as 66.6mm), and finely adjustable short focal length to meet the needs of various scenarios such as daily shooting, landscape, and close-up, and lower the threshold of multi-lens photography.

[0010] (2) Lowering the threshold for optical cognition. Popular science in optics is often limited by the high price and closed structure of professional lenses, which cannot be disassembled for observation; simple lens groups also lack a stable structure, resulting in blurry images. The lens of this utility model has the characteristics of modular reusability, low cost, easy operation, and clear imaging. It can be used as a popular science teaching tool to allow students to assemble and observe the images by hand, stimulate their interest in optics, and promote the popularization of scientific knowledge.

[0011] (3) The role of concrete and visual optical teaching. Optical principles such as "the relationship between the number of lenses and the focal length" and "the effect of aperture on depth of field" are often taught in traditional teaching by formula derivation and two-dimensional diagrams, which are difficult for students to understand intuitively. This lens allows students to directly observe changes in imaging effects, such as shortening the focal length and reducing aberrations, by "assembling different structures by hand". This transforms abstract concepts such as "focal length calculation" and "aberration control" into "touchable and observable" practices, greatly improving teaching efficiency. Attached Figure Description

[0012] Figure 1 A schematic diagram of the basic modular unit structure of a modularly assembled lens;

[0013] Figure 2 A three-dimensional cross-sectional schematic diagram of the basic modular unit structure of a modularly assembled lens;

[0014] Figure 3 A three-dimensional structural view of the first lens barrel assembly;

[0015] Figure 4 A three-dimensional structural diagram of the aperture structure assembly;

[0016] Figure 5 This is a three-dimensional structural view of the second lens barrel assembly;

[0017] Figure 6 A schematic diagram of the structure of the first lens group formed after the lens is installed on the first lens barrel assembly;

[0018] Figure 7 A schematic diagram of the structure of the second lens group formed after installing a lens with its convex surface facing the image side into the second lens barrel assembly;

[0019] Figure 8 A schematic diagram of the structure of the second lens group formed after installing a lens with its convex surface facing the object side into the second lens barrel assembly;

[0020] Figure 9 This is a schematic diagram of the assembly structure of the assembled lens in Example 2;

[0021] Figure 10 This is a three-dimensional cross-sectional view of the assembled lens in Example 2;

[0022] Figure 11 This is a perspective view of the assembled lens in Example 2;

[0023] Figure 12 This is a schematic diagram of the assembly structure of the assembled lens in Example 3;

[0024] Figure 13 This is a three-dimensional cross-sectional view of the assembled lens in Example 3;

[0025] Figure 14 This is a perspective view of the assembled lens in Example 3;

[0026] Figure 15 This is a schematic diagram of the assembly structure of the assembled lens in Example 4;

[0027] Figure 16 This is an exploded view of the assembly structure of the assembled lens in Example 4;

[0028] Figure 17 This is a three-dimensional cross-sectional view of the assembled lens in Example 4;

[0029] Figure 18 This is a perspective view of the assembled lens in Example 4.

[0030] Reference numerals: 1—First lens barrel assembly, 11—First lens group, 2—Second lens barrel assembly, 21—Second lens group, 3—Aperture structure assembly, 31—Aperture, 4—Lens assembly, 5—Pressure ring, 6—Protruding ring. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] A modular lens assembly comprises a first lens barrel assembly 1, a second lens barrel assembly 2, and an aperture structure assembly 3. The first lens barrel assembly 1 has an internal thread at one end and an external thread at the other, allowing a lens assembly 4 to be inserted through one end to form a first lens group 11. At least one second lens barrel assembly 2 has an internal thread at one end and an external thread at the other, allowing a lens assembly 4 to be inserted through one end to form a second lens group 21. The aperture structure assembly 3 is a thin cylindrical structure with an aperture 31 internally mounted in the center. Its front and rear ends are respectively provided with external and internal threads that are compatible with the internal and external threads of the first and second lens barrel assemblies 1 and 2, respectively, allowing the first lens group 11 and at least one second lens group 21 to be mounted at opposite ends of the aperture structure assembly 3 to form the assembled lens. The optical axes of all lens assemblies 4 are strictly aligned. The lens assembly 4 is a cemented doublet positive lens with a focal length of 100mm.

[0034] The first lens barrel assembly 1 serves two functions: forming the first lens group 11 (with a lens) and acting as a connecting tube (without a lens); similarly, the second lens barrel assembly 2 also serves two functions: forming the first lens group 11 (with a lens) and acting as a connecting tube (without a lens); both of them have the same internal and external thread combination at both ends, which can realize mutual front and rear assembly; the aperture structure assembly 3 also has corresponding screw hole structures at both ends that are adapted to internal and external threads, and the three can be combined and installed together.

[0035] During assembly, the first lens barrel assembly 1 and the second lens barrel assembly 2 have a lens limiting ring at one end and a movable clamping ring 5 at the other end to facilitate the insertion of the lens assembly 4. The clamping ring 5 can press the lens assembly 4 along its edge into the lens barrel assembly. When multiple lens barrel assemblies are assembled, the clamping ring 5 can be pressed down. The outermost lens group also needs to be tightened with the externally threaded clamping ring 5 to prevent it from coming out. When installing or removing the lens assembly 4, the clamping ring 5 needs to be unscrewed, the lens assembly 4 needs to be inserted or removed, and then the clamping ring 5 needs to be screwed back on.

[0036] Therefore, it is possible to realize an aperture structure component 3, with several connecting tube components or lens groups installed at both ends to form the required assembled lens structure.

[0037] Example 2: Based on Example 1, the first lens structure that can be assembled by this lens assembly is as follows: the first lens barrel assembly 1 does not place the lens assembly 4, but serves as a connecting barrel assembly and is connected to one end of the aperture structure assembly 3. The other end of the aperture structure assembly 3 is connected to and installed with the second lens group 21. The convex surface of the lens assembly 4 of the second lens group 21 faces the object side, thereby realizing a lens with a focal length consistent with the lens focal length.

[0038] During operation:

[0039] 1. Component preparation:

[0040] Connector: 1 set, first lens barrel assembly 1, without lens, clamping ring 5 has been reset;

[0041] Aperture 31 assembly: 1 set, aperture structure assembly 3 in normal aperture 31 condition;

[0042] The second lens group 21:1 set consists of a double cemented positive lens already installed in the second lens barrel assembly 2, with the convex surface of the lens facing the object, and the clamping ring 5 installed in place;

[0043] 2. Assemble sequentially (according to the optical axis: object side → image side):

[0044] Step 1: Connect the receiver tube to the aperture 31 assembly;

[0045] Hold the internally threaded end of the first lens barrel assembly 1, which serves as the connector, and align it with the externally threaded object end of the aperture structure assembly 3. Rotate the connector until the end faces of the two components are in contact. At this time, the clamping ring 5 inside the connector is pressed tightly by the end face of the aperture 31 assembly without any looseness.

[0046] Step 2: Connect the aperture 31 assembly to the second lens group 21;

[0047] Hold the internally threaded end (image-side end) of the aperture structure component 3 and align it with the externally threaded object-side end of the second lens group 21. Rotate the second lens group 21 until the end faces of the two components are in contact, and the clamping ring 5 inside the second lens group 21 is pressed by the end face of the aperture 31 component.

[0048] At this point, the overall structure is as follows: object side → first lens barrel assembly 1 (without lens) → aperture structure assembly 3 → second lens group 21 (second lens barrel assembly 2 with lens and convex surface facing the object side) → image side.

[0049] 3. Fixing and Calibration:

[0050] Screw the externally threaded washer clockwise into the image-side external thread of the second mirror group 21 until the end face of the washer fits against the clamping ring 5 inside the second mirror group 21.

[0051] 4. Functional verification:

[0052] Connect the camera body (via an adapter ring or by direct mounting), photograph a standard target board, and observe whether the image is clear (without obvious color difference or edge distortion) and whether the focal length is close to 100mm (verified by calculating the image size of the target board).

[0053] A 100mm focal length assembled lens is obtained. The entire system is equivalent to a simple optical system of "1 positive lens + 1 aperture 31": object-side rays first pass through aperture 31 (controlling the amount of light entering), and then enter the positive lens; the positive lens converges the diverging object-side rays, ultimately forming a clear real image on the image-side sensor. Because it contains only 1 positive lens, the total focal length of the system = the focal length of a single lens (100mm), achieving a "standard focal length consistent with the lens focal length", suitable for shooting in general scenes.

[0054] Example 3: The second lens structure that can be assembled with this lens assembly is: a first lens group 11, an aperture structure assembly 3, and a second lens group 21 are combined and installed together. The lens assemblies 4 of both the first lens group 11 and the second lens group 21 have convex surfaces facing away from the aperture 31. This allows for a lens with a focal length less than the sum of the focal lengths of the two lenses. The internal dimensions of the first lens barrel assembly 1 and the second lens barrel assembly 2 are identical. The aperture 31 of the aperture structure assembly 3 is positioned centrally, making the lens assemblies 4 of the first lens group 11 and the second lens group 21 symmetrical with respect to the aperture 31.

[0055] Based on Embodiment 2, the difference is that a lens assembly 4 is installed inside the first lens barrel assembly 1.

[0056] The system comprises a single first lens group 11, an aperture structure assembly 3, and a single second lens group 21, forming two positive lenses in a symmetrically arranged short focal length imaging system. Both lenses have convex surfaces facing away from the aperture 31, and their barrel specifications are identical, with equal distances from the lenses to the aperture 31, creating a "symmetrical structure." The "converging effect" of the two positive lenses, combined with the symmetrical layout, optimizes aberrations: according to the lens group formula, the combination of two 100mm positive lenses (assuming a spacing d=50mm) results in a total focal length ≈ 66.6mm (far less than 100mm and also less than the sum of focal lengths of 200mm), achieving "short focal length imaging." Short focal lengths are suitable for wide-angle framing, such as landscape photography.

[0057] Example 4: The third type of lens structure that can be assembled with this lens is: along the optical axis, from the object side to the image side, a first lens group 11 with two lens assemblies 4 facing away from the aperture 31, an aperture structure assembly 3, a barrel assembly without lens assembly 4, and a second lens group 21 with lens assembly 4 facing away from the aperture 31, forming a combined lens. This can achieve a lens with a focal length less than the sum of the focal lengths of the three lenses.

[0058] This embodiment can be seen as a combination of embodiments 2 and 3. The specific structure is as follows: a first lens group 11, a second lens barrel assembly 2, an aperture structure assembly 3, and two second lens groups 21, with a total of 3 positive lenses. The "strong convergence and superposition" of the 3 positive lenses, combined with the "spacing adjustment" of the lens barrel, achieves more flexible focal length control. The convergence effect of the 3 positive lenses is stronger than that of the 2 lenses, and the total focal length is further shortened (e.g., the total focal length may be reduced to below 50mm), which is suitable for wider-angle scenes.

[0059] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A modular assembly lens characterized by include: The first lens barrel assembly (1) has an internal thread at least at one end, which allows the lens assembly (4) to be inserted from the opening at one end to form the first lens group (11). The second lens barrel assembly (2), at least one set, has an internal thread at one end and an external thread at the other end, and can insert the lens assembly (4) from the barrel opening at one end to form the second lens group (21); The aperture structure assembly (3) has a thin cylindrical structure with an aperture (31) installed in the middle. The front and rear ends are respectively provided with external threads and internal threads that can be matched with the internal and external threads of the first lens barrel assembly (1) and the second lens barrel assembly (2), so that the first lens group (11) and at least one set of second lens groups (21) can be installed at both ends of the aperture structure assembly (3) to form an assembled lens.

2. The modular assembly lens according to claim 1, characterized in that: The lens assembly (4) is a cemented doublet positive lens with a focal length of 100mm.

3. The modular assembly lens according to claim 2, wherein: The first lens barrel assembly (1) does not have a lens assembly (4) placed on it. Instead, it serves as a receiving barrel assembly and is connected to one end of the aperture structure assembly (3). The other end of the aperture structure assembly (3) is connected to the second lens group (21), and the convex surface of the lens assembly (4) of the second lens group (21) faces the object.

4. The modular assembly lens according to claim 2, wherein: A first lens group (11), an aperture structure assembly (3), and a second lens group (21) are assembled together. The lens assemblies (4) of the first lens group (11) and the second lens group (21) are both convex and face away from the aperture (31).

5. The modular assembly lens according to claim 4, characterized in that: The first lens barrel assembly (1) and the second lens barrel assembly (2) have the same internal dimensions. The aperture (31) of the aperture structure assembly (3) is set in the center position, so that the lens assembly (4) of the first lens group (11) and the second lens group (21) are symmetrical with respect to the aperture (31).

6. The modular assembly lens according to claim 3, wherein: Along the optical axis, from the object side to the image side, there are two sets of lens assemblies (4), the first lens group (11) with the convex surface facing away from the aperture (31), the aperture structure assembly (3), the tube assembly without lens assembly (4), and the second lens group (21) with the convex surface facing away from the aperture (31), forming a combined lens.

7. A modular assembly lens according to any one of claims 1-6, characterized in that: The first lens barrel assembly (1) and the second lens barrel assembly (2) are provided with a lens limiting ring at one end and a movable clamping ring (5) at the other end; the clamping ring (5) can press the lens assembly (4) along the edge into the lens barrel assembly.

8. The modular assembly lens according to claim 7, characterized in that: A raised ring (6) is provided on the outer wall of the first lens barrel assembly (1). The raised ring (6) has an external thread on its side for docking with the internal thread of the zoom barrel or other lens.

Images