Lens optical switching device, mobile phone protection shell and mobile phone high-definition shooting system

Abstract

The invention discloses a lens optical switching device, a mobile phone protection shell and a mobile phone high-definition shooting system.The lens optical switching device comprises a lens barrel, a first lens unit, a second lens unit, a third lens unit and a fourth lens unit, the lens barrel is provided with a first end and a second end which are opposite, the first end is used for being detachably connected with a lens switching ring, and the second end is used for being detachably connected with the mobile phone protection shell; the object side surface of the first lens unit is a plane, the image side surface of the first lens unit is a convex surface, the second lens unit is arranged in the lens barrel and is spaced from the first lens unit, the object side surface of the second lens unit is a plane, and the image side surface of the second lens unit is a concave surface. According to the technical scheme, the mobile phone can be compatible with a professional camera lens, and the purpose of high-quality photographing on the mobile phone is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic and video equipment, and particularly relates to a lens optical adapter, a mobile phone case, and a high-definition mobile phone shooting system. Background Art

[0002] With the popularization of smart phones, the shooting function has become an indispensable part of people's daily lives. Whether taking photos or shooting videos, the mobile phone camera has become an important tool for many people to record and share their lives. However, despite the significant progress made in the hardware and software of modern smart phones, especially in image processing technology, there are still some limitations in long-distance shooting, high magnification, and the imaging effect in complex scenes. For users who pursue high-quality photography, especially when performing professional photography such as telephoto and macro photography, the built-in camera of the mobile phone often fails to achieve an imaging effect comparable to that of a professional camera.

[0003] To make up for this deficiency, related technologies usually install accessories such as magnification lenses behind the mobile phone camera to improve the shooting ability.

[0004] However, if one wants to achieve high-definition shooting at a long distance through a mobile phone, a specially designed mobile phone lens is usually required. The shooting distance and shooting effect of these lenses are still limited, and they cannot be directly compatible with professional camera lenses, unable to give full play to the advantages of professional lenses, resulting in the inability to make full use of the high performance and imaging ability of professional camera lenses. Summary of the Invention

[0005] The main object of the present invention is to propose a lens optical adapter, aiming to solve the problem that the mobile phone camera cannot be compatible with professional camera lenses.

[0006] To achieve the above object, the present invention proposes a lens optical adapter, which is applied to a high-definition mobile phone shooting system. The high-definition mobile phone shooting system includes a mobile phone case and a lens adapter ring. The mobile phone case is used for installing a mobile phone, and the lens adapter ring is used for connecting a camera lens. The lens optical adapter includes:

[0007] A lens barrel having opposite first and second ends. The first end is used for detachably connecting to the lens adapter ring, and the second end is used for detachably connecting to the mobile phone case;

[0008] A first lens unit disposed inside the lens barrel. The object side of the first lens unit is a plane, and the image side of the first lens unit is a convex surface;

[0009] A second lens unit disposed inside the lens barrel and spaced apart from the first lens unit. The object side of the second lens unit is a plane, and the image side of the second lens unit is a concave surface.

[0010] In some embodiments, the first lens unit and the second lens unit are sequentially arranged at intervals along a first direction;

[0011] The first lens unit includes:

[0012] A first lens group having a positive optical power, the object side of the first lens assembly being a plane and the image side being a convex surface;

[0013] A second lens group disposed on the image side of the first lens group and spaced apart from the first lens group, the second lens group having a negative optical power, the object side of the second lens group being a concave surface and the image side being a convex surface;

[0014] The second lens unit includes:

[0015] A third lens group having a positive optical power, the object side of the third lens group being a plane and the image side being a convex surface;

[0016] A fourth lens group having a positive optical power, the object side of the fourth lens group being a convex surface and the image side being a plane;

[0017] A fifth lens group, the second lens group having a negative optical power, the object side of the fifth lens group being a convex surface and the image side of the fifth lens assembly being a concave surface.

[0018] In some embodiments, the first lens unit is composed of two lens groups, and the second lens unit is composed of three lens groups;

[0019] Wherein, the sum of the number of lenses of the first lens unit and the second lens unit is five;

[0020] Or, the sum of the number of lenses of the first lens unit and the second lens unit is eleven.

[0021] In some embodiments, the first lens group includes a first lens, a second lens, a third lens, and a fourth lens arranged in sequence from the object side to the image side;

[0022] Wherein, the object side of the first lens is a plane and the image side is a convex surface with a radius of curvature of R1;

[0023] The object side of the second lens is a concave surface with a radius of curvature of R2 and the image side is a convex surface with a radius of curvature of R3;

[0024] The object side of the third lens is a concave surface with a radius of curvature of R4 and the image side is a plane;

[0025] The object side of the fourth lens is a concave surface with a radius of curvature of R5, and the image side is a convex surface with a radius of curvature of R6;

[0026] Wherein, the first lens, the second lens, the third lens and the fourth lens are arranged in close contact in sequence; the effective optical diameters of the first lens, the second lens, the third lens and the fourth lens are OD1 < OD2 < OD3 < OD4 in sequence.

[0027] In some embodiments, the second lens group includes a fifth lens, and the fifth lens is arranged at an interval from the fourth lens;

[0028] Wherein, the object side of the fifth lens is a concave surface with a radius of curvature of R7, the image side is a convex surface with a radius of curvature of R8, the effective optical diameter of the fifth lens is OD5, and OD5 > OD4.

[0029] In some embodiments, the third lens group includes a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side;

[0030] Wherein, the object side of the sixth lens is a plane, and the image side is a concave surface with a radius of curvature of R9; the effective optical diameter of the sixth lens is OD6;

[0031] The object side of the seventh lens is a plane, and the image side is a concave surface with a radius of curvature of R10; the effective optical diameter of the seventh lens is OD7, and OD7 is equal to OD6;

[0032] The object side of the eighth lens is a convex surface with a radius of curvature of R11, the image side is a convex surface with a radius of curvature of R12, the effective optical diameter of the eighth lens is OD8, and OD8 is equal to OD7;

[0033] Wherein, the object side of the sixth lens is arranged at an interval from the image side of the fifth lens, and the sixth lens, the seventh lens and the eighth lens are arranged in close contact.

[0034] In some embodiments, the fourth lens group includes a ninth lens, the object side of the ninth lens is a convex surface with a radius of curvature of R13, the image side of the ninth lens is a plane, the object side of the ninth lens is in close contact with the image side of the eighth lens, and the effective optical diameter of the ninth lens is smaller than the effective optical diameter of the eighth lens.

[0035] In some embodiments, the fifth lens group is a cemented lens, the object side of the cemented lens is a convex surface, the image side of the cemented lens is a concave surface, the cemented lens is configured to focus the light beam on the same plane, and the effective optical diameter of the fifth lens group is smaller than the effective optical diameter of the fourth lens group.

[0036] The present invention further provides a mobile phone protective case, which includes the lens optical adapter device as described in the foregoing embodiment. The mobile phone protective case includes a first mounting portion and a second mounting portion. The first mounting portion is used for sleeving the mobile phone, and the second mounting portion is connected to the second end of the lens barrel by means of a thread or a buckle.

[0037] The present invention further also provides a mobile phone high-definition shooting system, which includes a mobile phone, a camera lens, and also includes the mobile phone protective case as described in the foregoing embodiment.

[0038] The beneficial effects of the technical solution of the present invention are as follows: By combining the first lens unit and the second lens unit in the lens optical adapter device, the problem of incompatibility between the mobile phone lens and the professional camera lens in the related art is solved. The first lens unit is configured with a planar object side and a convex image side, and is used for preliminary focusing and controlling the light incident angle of the light beam, ensuring the accuracy of light introduction during the shooting process. The concave image side of the second lens unit further receives and processes the light beam emitted by the first lens unit, and is used for controlling high-order aberrations, improving the shooting image quality. In this way, not only can the imaging quality in complex scenes such as telephoto and macro be ensured, but also the advantages of the camera lens can be fully utilized, improving the professional performance of the mobile phone photography system, enabling the mobile phone to be compatible with the professional camera lens, and achieving the goal of high-quality photography on the mobile phone. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the overall structure of the lens optical adapter device in an embodiment of the present invention;

[0040] Figure 2 It is a front view of the lens optical adapter device in an embodiment of the present invention;

[0041] Figure 3 It is Figure 2 the section at A-A in

[0042] Figure 4 It is Figure 3 the section at another perspective in

[0043] Figure 5 It is an exploded view of the lens optical adapter device in an embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the overall structure of the mobile phone high-definition shooting system in an embodiment of the present invention.

[0045] Explanation of the Reference Numerals in the Drawings:

[0046] 10. Lens optical adapter device;

[0047] 100. Mobile phone protective case; 101. First mounting portion; 102. Second mounting portion;

[0048] 200, lens adapter ring;

[0049] 300, lens optical adapter device;

[0050] 301, lens barrel; 301a, first end; 301b, second end;

[0051] 310, first lens unit;

[0052] 311, first lens group; G1, first lens; G2, second lens; G3, third lens; G4, fourth lens;

[0053] 312, second lens group;

[0054] 320, second lens unit;

[0055] 330, third lens group; G6, sixth lens; G7, seventh lens; G8, eighth lens;

[0056] 340, fourth lens group;

[0057] 350, fifth lens group;

[0058] 400, mobile phone case; 401, first mounting part; 402, second mounting part;

[0059] F mobile phone; 500, camera lens; 600, lens adapter ring.

[0060] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0061] Next, the solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0062] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0063] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element present at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present at the same time.

[0064] In addition, in the present invention, the descriptions involving "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] Related technologies usually enhance the shooting ability by adding accessories such as magnification lenses behind the mobile phone camera. However, if one wants to achieve high-definition shooting at a long distance through a mobile phone, a specially designed mobile phone lens is usually required. The shooting distance and shooting effect of these lenses are still limited, and they cannot be directly compatible with professional camera lenses, unable to fully utilize the advantages of professional lenses, resulting in the inability to make full use of the high performance and imaging capabilities of professional camera lenses. The existing mobile phone lens adapter rings on the market only provide mechanical connections and lack necessary optical correction elements, resulting in serious imaging distortion, blurring, chromatic aberration and other problems when the professional lens is connected to the mobile phone, and an ideal shooting effect cannot be obtained. Therefore, this embodiment proposes an optical adapter device that can effectively connect a professional camera lens and a mobile phone to enhance the professional performance of mobile phone photography. Specifically, reference can be made to Figures 1 to 3 In an embodiment of the present invention, a lens optical adapter device 300 is proposed, which is applied to a mobile phone high-definition shooting system. The mobile phone high-definition shooting system includes a mobile phone protective case 100 and a lens adapter ring 200. The mobile phone protective case 100 is used for installing the mobile phone, and the lens adapter ring 200 is used for connecting the camera lens 500. The lens optical adapter device 300 includes:

[0066] A lens barrel 301, the lens barrel 301 has opposite first end 301a and second end 301b. The first end 301a is used for detachably connecting with the lens adapter ring 200, and the second end 301b is used for detachably connecting with the mobile phone protective case 100;

[0067] A first lens unit 310, which is disposed inside the lens barrel 301. The object side surface of the first lens unit 310 is a plane, and the image side surface of the first lens unit 310 is a convex surface;

[0068] The second lens unit 320 is disposed within the lens barrel 301 and is spaced apart from the first lens unit 310. The object side surface of the second lens unit 320 is a flat surface, and the image side surface of the second lens unit 320 is a concave surface.

[0069] In this embodiment, the lens barrel 301 is a hollow cylindrical structure and can be made of aluminum alloy, stainless steel, or high-strength engineering plastic, featuring light weight and durability. The lens barrel 301 can be provided with lens mounting structures inside, such as positioning grooves, fixing rings, and shock pads, to ensure that each lens unit is firmly mounted and accurately aligned with the optical axis. Further, the inner wall of the lens barrel 301 can be subjected to anti-reflection treatment to effectively prevent internal reflection and scattered light, avoiding the influence of stray light on the imaging quality. In addition, standard threaded interfaces are provided at both ends of the lens barrel 301. The first end 301a adopts the threaded specifications of a common camera lens 500 bayonet, and the second end 301b is matched with the connection thread of the dedicated mobile phone protective case 100.

[0070] The first lens unit 310 is mounted within the lens barrel 301 and is located near the first end 301a, i.e., the object side surface. The object side surface of the first lens unit 310 is a flat surface, which can reduce the distortion of incident light and ensure that the light emitted from the professional lens enters the adapter device with the minimum distortion rate. The image side surface of the first lens unit 310 is a convex structure, mainly used for initially focusing light and controlling the divergence angle of the light beam to make it suitable for the receiving characteristics of the mobile phone camera.

[0071] The second lens unit 320 is mounted within the lens barrel 301 and is located near the second end 301b, i.e., the image side surface. The object side surface of the second lens unit 320 is designed as a flat surface, which is used to receive the light processed by the first lens unit 310 and maintain the accuracy of the light beam transmission. The image side surface of the second lens unit 320 is a concave structure, mainly used for compensating the spherical aberration introduced by the first lens unit 310 and simultaneously controlling the matching degree between the imaging plane and the mobile phone camera sensor to ensure a clear imaging effect.

[0072] During use, the user first connects the first end 301a of the optical lens adapter device to the lens adapter ring 200, and then mounts a professional camera lens 500 (such as various models of lenses of brands like Canon, Nikon, and Sony) on the lens adapter ring 200. Then, the second end 301b of the optical lens adapter device is connected to the dedicated mobile phone protective case 100, and finally, the mobile phone is installed within the mobile phone protective case 100 to complete the assembly of the entire system.

[0073] When light passes through a professional lens and enters the optical path of this adapter device, it is as follows: First, the light passes through the lens adapter ring 200 and enters the interior of the lens barrel 301, reaching the planar object side of the first lens unit 310. Since professional camera lenses 500 are designed for larger sensors, the image plane they project is much larger than that of a mobile phone camera sensor. Therefore, an optical system is required for adjustment. After passing through the planar object side of the first lens unit 310, the light encounters the convex image side, at which point the light is preliminarily focused, and the divergence angle of the light beam is controlled within a range suitable for the mobile phone camera to receive.

[0074] Subsequently, the light processed by the first lens unit 310 continues to advance and reaches the planar object side of the second lens unit 320. This planar design ensures the accuracy of light beam transmission and reduces additional aberrations that may occur during transmission. When the light passes through the second lens unit 320 and exits through its concave image side, the light beam is further corrected, especially for compensating higher-order aberrations, while precisely adjusting the imaging plane to the same position as the focus plane of the mobile phone camera sensor. Finally, the optically adjusted light enters the mobile phone camera to form a clear image.

[0075] The beneficial effects of the technical solution of the present invention are as follows: By the combined design of the first lens unit 310 and the second lens unit 320 in the lens optical adapter device 300, the problem of incompatibility between the mobile phone lens and the professional camera lens 500 in the related art is solved. Specifically, the first lens unit 310 is configured with a planar object side and a convex image side for preliminary focusing and controlling the light incident angle of the light beam, ensuring the accuracy of light introduction during the shooting process. The concave image side design of the second lens unit 320 further receives and processes the light beam emitted by the first lens unit 310 to control higher-order aberrations and improve the shooting image quality.

[0076] The lens optical adapter device 300 of the present invention realizes the effective connection between the professional camera lens 500 and the mobile phone camera, breaking through the limitations of traditional mobile phone photography. Users can use various professional-level wide-angle, telephoto, macro, etc. lenses for mobile phone photography creation, significantly improving the performance of the mobile phone in different shooting scenarios. Especially in an environment with insufficient light, by using a large-aperture professional lens, the low-light shooting ability of the mobile phone is significantly improved.

[0077] In addition, the device has a simple structure and is convenient to use. Without a complex debugging process, it can achieve professional-level shooting effects. It can not only ensure the imaging quality in complex scenarios such as telephoto and macro, but also make full use of the advantages of the camera lens 500 to improve the professional performance of the mobile phone photography system.

[0078] Continue to refer to Figure 3 and Figure 4, in this embodiment, the first lens unit 310 and the second lens unit 320 are sequentially arranged at intervals along the first direction;

[0079] The first lens unit 310 includes:

[0080] A first lens group 311, the first lens group 311 has a positive optical power, the object side of the first lens group 311 is a plane, and the image side of the first lens group 311 is a convex surface;

[0081] A second lens group 312, which is arranged on the image side of the first lens group 311 and is spaced from the first lens group 311. The second lens group 312 has a negative optical power, the object side of the second lens group 312 is a concave surface, and the image side of the second lens group 312 is a convex surface;

[0082] The second lens unit 320 includes:

[0083] A third lens group 330, the third lens group 330 has a positive optical power, the object side of the third lens group 330 is a plane, and the image side of the third lens group 330 is a convex surface;

[0084] A fourth lens group 340, the fourth lens group 340 has a positive optical power, the object side of the fourth lens group 340 is a convex surface, and the image side of the fourth lens group 340 is a plane;

[0085] A fifth lens group 350, the second lens group 312 has a negative optical power, the object side of the fifth lens group 350 is a convex surface, and the image side of the fifth lens group 350 is a concave surface.

[0086] In this embodiment, the first lens unit 310 and the second lens unit 320 are sequentially arranged at intervals along the first direction to form a complete optical system for realizing the optical matching between the professional camera lens 500 and the mobile phone camera.

[0087] The first lens unit 310 includes the first lens group 311 and the second lens group 312 arranged in sequence. These two lens groups work together and are mainly responsible for initially receiving and processing the light from the professional camera lens 500.

[0088] The first lens group 311 has a positive optical power, which means it has a converging effect on the incident light. The object side of the first lens group 311 is designed as a plane, and this design can reduce the distortion of the incident light and ensure that the light emitted from the professional lens can enter the adapter device with the minimum distortion rate. The image side of the first lens group 311 is a convex surface, and this structure enables the light passing through the plane object side to start to produce a converging effect, preparing for subsequent optical path processing.

[0089] The second lens group 312 is disposed on the image side of the first lens group 311 and is spaced apart from the first lens group 311 to ensure sufficient optical path distance between the two lens groups, facilitating the spatial propagation and modulation of light. The second lens group 312 has a negative focal power and diverges light, which forms an optical compensation for the converging effect of the first lens group 311. The object side of the second lens group 312 is concave, used to receive the light converged by the first lens group 311 and start to diverge and adjust it. The image side of the second lens group 312 is convex, and this hyperbolic design (concave-convex structure) forms a negative lens group, mainly used to correct spherical aberration and chromatic aberration, and at the same time control the exit angle of the light beam.

[0090] The second lens unit 320 is composed of three lens groups, namely the third lens group 330, the fourth lens group 340, and the fifth lens group 350. These three lens groups are arranged in sequence to form a complex optical modulation system, which is mainly responsible for adjusting the light and making it match the sensor characteristics of the mobile phone camera.

[0091] The third lens group 330 has a positive focal power and converges light. The object side of the third lens group 330 is flat, facilitating the reception of the light processed by the first lens unit 310 and reducing additional optical path disturbances. The image side of the third lens group 330 is convex, and this structural design makes the light converge again and start the second stage of optical modulation.

[0092] The fourth lens group 340 has a positive focal power and continues the converging trend of the third lens group 330, further strengthening the light converging effect. The object side of the fourth lens group 340 is convex, forming an optical coupling with the convex image side of the third lens group 330 to enhance the converging ability. The image side of the fourth lens group 340 is flat, and this design makes the converging light beam maintain a good phase plane when leaving the fourth lens group 340, reducing wavefront aberration.

[0093] The fifth lens group 350 has a negative focal power and diverges light. The object side of the fifth lens group 350 is convex, receiving the light converged by the previous two lens groups. The image side of the fifth lens group 350 is concave, and this structure forms a typical negative lens, which makes a final adjustment to the light beam in the last stage of the optical path, mainly used to accurately control the focal plane position to make it accurately match the sensor plane of the mobile phone camera, and at the same time compensate for the remaining aberrations in the system.

[0094] After the light passes through the professional lens, it passes through the lens adapter ring 200 and enters the interior of the lens barrel 301, reaching the first lens group 311 of the first lens unit 310. Since the object side of the first lens group 311 is a plane, the light hardly undergoes refraction changes, and the original imaging information is maintained. When the light passes through the convex image side of the first lens group 311, it begins to converge, and the beam angle begins to deflect toward the optical axis.

[0095] Then, the light rays that have been initially converged continue to move forward and reach the concave object side of the second lens group 312. At this point, the light rays begin to diverge moderately due to the effect of the negative lens, and this divergence is mainly used to correct spherical aberration and chromatic aberration, while controlling the field of view. When the light rays pass through the convex image side of the second lens group 312, the light beams are further adjusted so that their divergence is controlled within an appropriate range, preparing for subsequent optical path processing.

[0096] After leaving the first lens unit 310, the light enters the second lens unit 320 and first reaches the flat object side of the third lens group 330. The design of the flat object side ensures the stability of the light beam transmission and reduces the introduction of additional distortion. When the light passes through the convex image side of the third lens group 330, a converging effect is generated again, and the light beam angle is deflected toward the optical axis again.

[0097] Next, the light enters the convex object side of the fourth lens group 340, and the convergence effect is further enhanced. When the light passes through the flat image side of the fourth lens group 340, the highly converged light beam leaves the fourth lens group 340 in a good phase plane state, ready for the final optical adjustment.

[0098] Finally, the light reaches the convex object side of the fifth lens group 350, and is finally adjusted at the critical stage of imaging. When the light passes through the concave image side of the fifth lens group 350, it is moderately diverged by the negative lens. This final divergence accurately controls the position of the focal plane, so that the imaging plane is accurately matched with the sensor of the mobile phone camera, and at the same time compensates for the remaining aberrations in the entire optical system.

[0099] Through the coordination of these five groups of lenses, the light emitted by the professional camera lens 500 undergoes proper optical modulation and ultimately forms a high-quality image on the sensor of the mobile phone camera that is clear, color-accurate, and has no obvious distortion, thus achieving the matching of the professional lens and the mobile phone camera system.

[0100] Continue reading Figure 3 In this embodiment, the first lens unit 310 is composed of two lens groups, and the second lens unit 320 is composed of three lens groups;

[0101] The sum of the number of lenses of the first lens unit 310 and the second lens unit 320 is five;

[0102] Alternatively, the sum of the number of lenses in the first lens unit 310 and the second lens unit 320 is eleven.

[0103] In this embodiment, the first lens unit 310 is composed of two lens groups, and the second lens unit 320 is composed of three lens groups. This combination design forms a complete optical adapter system. Specifically, the first lens unit 310 includes the aforementioned first lens group 311 and second lens group 312, and the second lens unit 320 includes a third lens group 330, a fourth lens group 340, and a fifth lens group 350.

[0104] Regarding the specific lens number configuration, this embodiment provides two methods. For example, the sum of the number of lenses in the first lens unit 310 and the second lens unit 320 is five. In this configuration, each lens group is basically composed of a single lens, forming a simple optical system. This configuration is suitable for application scenarios with high requirements for volume and cost, and can achieve lightweight and compact structure while ensuring basic optical performance.

[0105] In another embodiment, the sum of the number of lenses in the first lens unit 310 and the second lens unit 320 is eleven. In this configuration, some lens groups can adopt compound lens designs, such as doublet or triplet lenses, to form a more complex optical system. This configuration is suitable for professional application scenarios with high requirements for imaging quality, and can more effectively correct various optical aberrations, including chromatic aberration, spherical aberration, coma, and astigmatism, etc., to provide higher-quality imaging effects.

[0106] Users can choose a suitable configuration according to actual needs for the two solutions. The first solution is simple and economical, suitable for daily shooting; the second solution has excellent performance, suitable for professional photography creation. Regardless of which configuration is selected, the optical adapter device of the present invention can effectively achieve the optical matching between the professional camera lens 500 and the mobile phone camera, and greatly improve the professional performance of the mobile phone photography system.

[0107] Refer to Figure 3 and Figure 4 In this embodiment, the first lens group 311 includes a first lens G1, a second lens G2, a third lens G3, and a fourth lens G4 arranged in sequence from the object side to the image side;

[0108] Among them, the object side surface of the first lens G1 is a plane, and the image side surface is a convex surface with a curvature radius of R1; the plane object side design enables the light from the professional lens to directly enter the system without being interfered by additional refraction, maintaining the original imaging information. The convex image side then begins to perform preliminary convergence modulation on the light.

[0109] The object side of the second lens G2 is a concave surface with a radius of curvature of R2, and the image side is a convex surface with a radius of curvature of R3; this concave-convex structure forms a typical negative lens, which is mainly used to correct chromatic aberration and spherical aberration.

[0110] The object side of the third lens G3 is a concave surface with a radius of curvature of R4, and the image side is a flat surface; the concave object side continues to modulate the light, while the flat image side ensures that the light leaves in a good phase state.

[0111] The object side of the fourth lens G4 is a concave surface with a radius of curvature of R5, and the image side is a convex surface with a radius of curvature of R6; the light is finely adjusted again, for example, compensating for the light at the edge of the field of view.

[0112] Among them, the first lens G1, the second lens G2, the third lens G3, and the fourth lens G4 are arranged closely in sequence; an optical assembly without gaps is formed, reducing interface reflection and scattering and improving optical efficiency. The effective optical diameters of the first lens G1, the second lens G2, the third lens G3, and the fourth lens G4 are OD1 < OD2 < OD3 < OD4 in sequence (for example, OD1 = 10mm, OD2 = 15mm, OD3 = 20mm, OD4 = 25mm). This gradually increasing diameter design ensures that the light beam will not be limited by the aperture during propagation and guarantees the imaging quality of the edge field of view.

[0113] In terms of the radius of curvature, in this embodiment, the magnitudes of the radii of curvature are R1 < R2 < R3 < R4 < R5 < R6 in sequence. This progressive increase in the radius of curvature configuration has important optical significance.

[0114] For example, assume the specific values are: R1 = 10mm, R2 = 15mm, R3 = 20mm, R4 = 25mm, R5 = 30mm, R6 = 35mm. In this configuration, the light is first significantly refracted through the surface with strong curvature (R1), and then undergoes gradually weakened refraction effects (R2 to R6), achieving a smooth transition of the light, effectively reducing the accumulation effect of aberration, and showing excellent control over higher-order aberrations.

[0115] Another example, if another set of parameters is adopted: R1 = 8mm, R2 = 12mm, R3 = 18mm, R4 = 24mm, R5 = 32mm, R6 = 40mm. In this configuration, the strong refraction effect on the front surface and the weak refraction effect on the rear surface form a greater contrast, which is suitable for controlling the peripheral light of a large-aperture professional lens and improving the resolution of the edge field of view.

[0116] This progressive arrangement of the radius of curvature forms a refractive power distribution from strong to weak, enabling light to be appropriately refracted at different surfaces and achieving an ideal light path control effect. This design is suitable for the situation where it is necessary to re-project the image of a professional camera lens with a large field of view onto a smaller mobile phone sensor, and it can effectively maintain the field of view range of the original image while controlling various aberrations.

[0117] Refer to Figures 3 to 5 , in this embodiment, the second lens group 312 includes a fifth lens, and the fifth lens is arranged at an interval from the fourth lens G4;

[0118] Among them, the object side surface of the fifth lens is a concave surface with a radius of curvature of R7, the image side surface is a convex surface with a radius of curvature of R8, the effective optical diameter of the fifth lens is OD5, and OD5 > OD4.

[0119] In this embodiment, the second lens group 312 includes a fifth lens, and this lens is arranged at an interval from the fourth lens G4 of the aforementioned first lens group 311. In this way, an air gap is created, enabling light to have an appropriate propagation distance between the two lens groups, which is beneficial to the shaping and modulation of the light beam. The existence of this air gap provides an additional design freedom for the entire optical system.

[0120] The object side surface of the fifth lens is a concave surface with a radius of curvature of R7, and the image side surface is a convex surface with a radius of curvature of R8. This concave-convex structure forms a typical negative lens, which can diverge and modulate the light beam passing through the first lens group 311, control the convergence angle of the light, correct the spherical aberration and chromatic aberration introduced by the first lens group 311, and at the same time adjust the position of the imaging plane to match the subsequent light path; in addition, it can also expand the effective field of view and increase the imaging coverage range.

[0121] It is particularly worth noting that the effective optical diameter of the fifth lens is OD5, and it satisfies the relationship of OD5 > OD4. From the perspective of ray tracing, when the light beam passes through the first lens group 311, due to the diverging effect of the negative lens, the diameter of the light beam will increase. Therefore, the fifth lens needs to have a larger effective optical diameter to fully receive all the light rays emitted by the first lens group 311 and avoid the light beam being truncated, resulting in vignetting or veiling glare effects.

[0122] For example, a set of specific parameters are adopted: OD4 = 15mm, OD5 = 18mm, R7 = 40mm, R8 = 45mm. In this configuration, as the core component of the second lens group 312, the 3mm diameter margin of the fifth lens is sufficient to receive the marginal rays, ensuring a vignetting-free imaging of the entire field of view. At the same time, the curvature configuration of R7 and R8 forms a moderate negative optical power, precisely modulating the light beam of the first lens group 311.

[0123] In terms of material selection, the fifth lens can be made of optical glass with a high dispersion ratio (such as the SF series), which can more effectively correct the chromatic aberration of the system and improve the color reproduction ability of the imaging.

[0124] Generally speaking, in this embodiment, the design of the second lens group 312 and the first lens group 311 form an organic optical whole. The two work together to jointly achieve the goal of converting the imaging characteristics of the professional camera lens 500 into the optical characteristics suitable for a mobile phone camera.

[0125] Continue to refer to Figures 3 to 5 , in this embodiment, the third lens group 330 includes a sixth lens G6, a seventh lens G7, and an eighth lens G8 arranged in sequence from the object side to the image side;

[0126] Among them, the object side surface of the sixth lens G6 is a plane, and the image side surface is a concave surface with a curvature radius of R9; the effective optical diameter of the sixth lens G6 is OD6; the design of the plane object side enables the light from the second lens group 312 to enter the third lens group 330 with the smallest interface change, reducing interface reflection and scattering. The concave image side then performs a preliminary negative refraction modulation on the incident light beam and starts to finely control the propagation path of the light.

[0127] The object side surface of the seventh lens G7 is a plane, and the image side surface is a concave surface with a curvature radius of R10; the effective optical diameter of the seventh lens G7 is OD7, and OD7 is equal to OD6; it forms an optical continuity with the sixth lens G6, and the two consecutive plane-concave structures form a strengthened negative lens combination. It is particularly worth noting that the effective optical diameter of the seventh lens G7 is OD7, and OD7 is equal to OD6. This equal-diameter design indicates that the two lenses are completely matched in the radial dimension, which is beneficial to optical processing and assembly, and also ensures that the light beam will not produce an accidental diaphragm effect due to the change in the lens size during the transmission process.

[0128] The object side surface of the eighth lens G8 is a convex surface with a curvature radius of R11, and the image side surface is a convex surface with a curvature radius of R12. The effective optical diameter of the eighth lens G8 is OD8, and OD8 is equal to OD7; the double-convex structure forms a typical positive lens, which is used to converge and modulate the divergent light beam generated by the first two lenses, so that the light path returns to the expected propagation direction. The effective optical diameter of the eighth lens G8 is OD8, and OD8 is equal to OD7. This three-lens equal-diameter design forms a unity in the radial dimension, providing good structural stability and optical consistency for the entire third lens group 330.

[0129] In terms of lens arrangement, the object side of the sixth lens G6 is spaced from the image side of the fifth lens, and this spacing creates an air gap between the second lens group 312 and the third lens group 330, serving as an important demarcation point in the optical system. The sixth lens G6, the seventh lens G7, and the eighth lens G8 are closely arranged to form a gapless compound lens group. This close arrangement design reduces interface reflection, improves light transmittance, and also enhances the mechanical stability of the lens group.

[0130] Furthermore, two consecutive negative lenses (the sixth lens G6 and the seventh lens G7) can effectively control spherical aberration and chromatic aberration. Specifically for the beam that has been preliminarily modulated by the second lens group 312, the aberration distribution can be further optimized. Secondly, the last positive lens (the eighth lens G8) moderately converges the diverging beam, providing suitable incident conditions for the subsequent lens group.

[0131] The design of this compound lens group has remarkable features in patent technology. On the one hand, the close arrangement design of three lenses with equal diameters simplifies the processing and assembly difficulties and reduces the manufacturing cost; on the other hand, the "two negative and one positive" optical configuration provides good aberration balancing ability, ensuring the imaging quality of the entire optical adapter device.

[0132] Continue to refer to Figures 3 to 5 , in this embodiment, the fourth lens group 340 includes a ninth lens. The object side of the ninth lens is a convex surface with a radius of curvature of R13, the image side of the ninth lens is a plane, the object side of the ninth lens is in close contact with the image side of the eighth lens G8, and the effective optical diameter of the ninth lens is smaller than that of the eighth lens G8.

[0133] In this embodiment, the fourth lens group 340 adopts a simple single-lens structure, including the ninth lens. The object side of the ninth lens is a convex surface with a radius of curvature of R13, and the image side is a plane, forming a typical positive lens whose main optical function is to converge the beam.

[0134] It should be noted that the object side of the ninth lens is in close contact with the image side of the eighth lens G8. First, the air gap between the two lenses is eliminated, reducing interface reflection and scattering and improving optical efficiency. Secondly, this close arrangement design makes the eighth lens G8 and the ninth lens actually form a compound positive lens group, and they work together to precisely control the convergence of light.

[0135] In addition, the effective optical diameter of the ninth lens is smaller than that of the eighth lens G8. On the one hand, it can reduce the influence of marginal stray light on the imaging quality, optimize the depth-of-field performance, and improve the resolution of the central area. On the other hand, it can reduce the optical burden of the subsequent lens group, simplify the system design, and also control the field of view angle to make it more suitable for the receiving characteristics of the mobile phone camera.

[0136] This design with a smaller optical diameter actually enables the ninth lens to play a dual role of a lens and a diaphragm in the optical system, both refracting and modulating the light rays and controlling the beam diameter.

[0137] Refer to Figure 3 and Figure 4 In this embodiment, the fifth lens group 350 is a cemented lens. The object side of the cemented lens is convex, the image side is concave, and the cemented lens is configured to focus the light beam on the same plane. The effective optical diameter of the fifth lens group 350 is smaller than that of the fourth lens group 340.

[0138] In this embodiment, the fifth lens group 350 adopts a cemented lens structure, which is composed of two lenses (such as marked as G10 and G11) tightly bonded by optical glue. The object side of the cemented lens is convex, and the image side is concave, forming a typical "convex-concave" structure. This cemented lens is located at the last position of the entire optical adapter device and is directly installed closest to the mobile phone, being the last optical element before the light enters the mobile phone camera.

[0139] First of all, the cemented lens design can effectively correct chromatic aberration. For example, when two lenses adopt optical materials with different refractive indices and dispersion rates, an excellent achromatic aberration effect can be achieved. Secondly, the "convex-concave" structure forms a special optical combination with both converging and diverging optical characteristics, which can accurately control the final imaging plane of the light rays.

[0140] It should be noted that the fifth lens group 350 is specifically configured to focus the light beam on the same plane, ensuring that the light rays emitted from the professional camera lens 500 and modulated by the previous lens groups can finally form a clear image on the sensor plane of the mobile phone camera. This planar focusing ability is decisive for eliminating field curvature and ensuring uniform clarity within the entire field of view.

[0141] In addition, the effective optical diameter of the fifth lens group 350 is smaller than that of the fourth lens group 340, which can control the range of the light beam entering the mobile phone camera, avoid the aberration and stray light caused by the marginal light rays, and improve the imaging quality of the central area. In other words, as the last optical element, the fifth lens group 350 acts as a "tuner", which makes a final fine adjustment to the light rays processed by all the previous lens groups, ensuring that the output light beam of the entire optical adapter device perfectly matches the receiving characteristics of the mobile phone camera.

[0142] The present invention further provides a mobile phone case 100, which includes the lens optical adapter device 300 of the foregoing embodiment. The specific structure of the lens optical adapter device 300 refers to the above embodiment. Since the mobile phone case 100 adopts all the technical solutions of the above all embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. The mobile phone case 100 includes a first mounting portion 101 and a second mounting portion 102. The first mounting portion 101 is used for sleeving the mobile phone, and the second mounting portion 102 is connected to the second end 301b of the lens barrel 301 by threads or a snap connection.

[0143] Refer to Figure 6 , in this embodiment, the mobile phone case 100 includes two main parts: a first mounting portion 101 and a second mounting portion 102. The first mounting portion 101 is designed as a housing structure for sleeving the mobile phone, which can firmly accommodate and protect the mobile phone while ensuring the normal operation and use of the mobile phone. The second mounting portion 102 is specifically designed for connecting to the second end 301b of the lens barrel 301, supporting a quick and stable connection through means such as threads or a snap connection.

[0144] In this way, users can easily connect and use a professional lens while protecting the mobile phone. When the user needs to perform professional photography, only need to connect the professional camera lens 500 to the first end 301a of the lens barrel 301 through the lens adapter ring 200, and then connect the second end 301b of the lens barrel 301 to the second mounting portion 102 of the mobile phone case 100. The entire system is simple to assemble, intuitive to operate, and does not require a complex debugging process.

[0145] Since the mobile phone case 100 adopts all the technical solutions of the above all embodiments, it inherits all the technical advantages and effects of the foregoing optical adapter device, including the perfect optical matching between the professional lens and the mobile phone camera, high-quality imaging effects, and effective control of various aberrations, etc. This enables the mobile phone equipped with this case to achieve a photography effect close to that of a professional camera, greatly expanding the application scenarios and creative possibilities of mobile phone photography.

[0146] The present invention further provides a high-definition mobile phone shooting system, which includes a mobile phone, a camera lens 500, and the mobile phone case 100 of the foregoing embodiment.

[0147] Continuing to refer to Figure 6 , in this embodiment, the high-definition mobile phone shooting system includes three core components: a mobile phone, a camera lens 500, and the mobile phone case 100 (which has integrated the lens optical adapter 300) described in detail in the foregoing embodiment. These three components cooperate with each other to form a complete high-quality photography system.

[0148] As the core computing and display platform of the entire system, the mobile phone provides basic functions such as image processing, storage, preview, and sharing. The system design is compatible with mainstream smartphone models on the market to meet the needs of most users.

[0149] The camera lens 500 part makes full use of existing professional photography resources. The system is compatible with a variety of professional camera lenses 500 of different brands and specifications, including but not limited to common wide-angle, standard, telephoto, and macro lenses, etc. This open and compatible design concept enables users to flexibly select the most suitable lens according to different shooting scenarios, greatly expanding the expressiveness and creative space of mobile phone photography.

[0150] The mobile phone case 100 (including the lens optical adapter 300) is the key bridge connecting the mobile phone and the professional lens. Through a precisely designed optical system, it solves the optical matching problem between the two, ensuring high-quality and stable imaging.

[0151] When these three components are used in combination, the user only needs to install the mobile phone in the case and connect the required professional lens to the system through the adapter to start shooting. The entire system is compact, lightweight, easy to carry, and the operation is simple and intuitive.

[0152] Through this highly integrated system design, professional photography technology is brought into the field of mobile devices, providing users with a photography experience close to that of professional cameras.

[0153] The above are only partial or preferred embodiments of the present invention. Whether in terms of text or drawings, they cannot limit the scope of protection of the present invention. Any equivalent structural transformation made using the content of the specification and drawings of the present invention under the overall concept of the present invention, or any direct / indirect application in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A lens optical adapter device, applied to a mobile phone high-definition shooting system, the mobile phone high-definition shooting system comprises a mobile phone protective shell and a lens adapter ring, the mobile phone protective shell is used to install the mobile phone, and the lens adapter ring is used to connect the camera lens, characterized in that: The lens optical switching device comprises: A lens barrel, the lens barrel having a first end and a second end opposite to each other, the first end being used for detachably connecting to the lens adapter ring, and the second end being used for detachably connecting to the mobile phone protective shell; A first lens unit is disposed in the lens barrel, wherein the object side surface of the first lens unit is a flat surface, and the image side surface of the first lens unit is a convex surface; The second lens unit is arranged in the lens barrel and spaced apart from the first lens unit. The object side surface of the second lens unit is a plane surface, and the image side surface of the second lens unit is a concave surface.

2. The lens optical adapter device according to claim 1, characterized in that: The first lens unit and the second lens unit are sequentially spaced apart along a first direction; The first lens unit comprises: a first lens group, the first lens group having positive optical power, the object side surface of the first lens assembly being a flat surface, and the image side surface of the first lens assembly being a convex surface; A second lens group is arranged on the image side of the first lens group and is spaced apart from the first lens group, the second lens group has negative optical power, the object side of the second lens group is a concave surface, and the image side of the second lens group is a convex surface; The second lens unit comprises: a third lens group, the third lens group having positive refractive power, the object side surface of the third lens group being a flat surface, and the image side surface of the third lens group being a convex surface; a fourth lens group, wherein the fourth lens group has positive refractive power, the object side surface of the fourth lens group is a convex surface, and the image side surface of the fourth lens group is a flat surface; The fifth lens group, the second lens group has negative optical power, the object side surface of the fifth lens group is convex, and the image side surface of the fifth lens group is concave.

3. The lens optical switching device according to claim 2 or 1, characterized in that: The first lens unit is composed of two lens groups, and the second lens unit is composed of three lens groups; The sum of the numbers of lenses of the first lens unit and the second lens unit is five; or the sum of the numbers of lenses of the first lens unit and the second lens unit is eleven.

4. The lens optical adapter device according to claim 2, characterized in that: The first lens group includes a first lens, a second lens, a third lens and a fourth lens arranged in sequence from the object side to the image side; The object side surface of the first lens is a plane, and the image side surface is a convex surface with a curvature radius of R1; The object side surface of the second lens is a concave surface with a curvature radius of R2, and the image side surface is a convex surface with a curvature radius of R3; The object side surface of the third lens is a concave surface with a curvature radius of R4, and the image side surface is a flat surface; The object side surface of the fourth lens is a concave surface with a curvature radius of R5, and the image side surface is a convex surface with a curvature radius of R6; The first lens, the second lens, the third lens and the fourth lens are arranged closely in sequence; the effective optical diameters of the first lens, the second lens, the third lens and the fourth lens are OD1 <OD2<OD3<OD4。 5. The lens optical adapter device according to claim 4, characterized in that: The second lens group includes a fifth lens, and the fifth lens is spaced apart from the fourth lens; The object side surface of the fifth lens is a concave surface with a curvature radius of R7, the image side surface is a convex surface with a curvature radius of R8, the effective optical diameter of the fifth lens is OD5, and OD5>OD4.

6. The lens optical adapter device according to claim 5, characterized in that: The third lens group includes a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side; The object side surface of the sixth lens is a plane, and the image side surface is a concave surface with a curvature radius of R9; the effective optical diameter of the sixth lens is OD6; The object side surface of the seventh lens is a plane, and the image side surface is a concave surface with a curvature radius of R10; the effective optical diameter of the seventh lens is OD7, and OD7 is equal to OD6; The object side surface of the eighth lens is a convex surface with a curvature radius of R11, the image side surface is a convex surface with a curvature radius of R12, the effective optical diameter of the eighth lens is OD8, ​​and OD8 is equal to OD7; The object side surface of the sixth lens is spaced apart from the image side surface of the fifth lens, and the sixth lens, the seventh lens and the eighth lens are closely attached.

7. The lens optical adapter device according to claim 6, characterized in that: The fourth lens group includes a ninth lens, the object side surface of the ninth lens is a convex surface with a curvature radius of R13, the image side surface of the ninth lens is a plane, the object side surface of the ninth lens is in close contact with the image side surface of the eighth lens, and the effective optical diameter of the ninth lens is smaller than the effective optical diameter of the eighth lens.

8. The lens optical adapter device according to claim 2, characterized in that: The fifth lens group is a cemented lens, the object side surface of the cemented lens is convex, the image side surface of the cemented lens is concave, the cemented lens is configured to focus the light beams on the same plane, and the effective optical diameter of the fifth lens group is smaller than the effective optical diameter of the fourth lens group.

9. A mobile phone protective case, characterized in that: It comprises the lens optical adapter device as described in any one of claims 1 to 8, wherein the mobile phone protective shell comprises a first mounting portion and a second mounting portion, the first mounting portion is used to fit the mobile phone, and the second mounting portion is connected to the second end of the lens barrel by a thread or a snap.

10. A mobile phone high-definition shooting system, comprising a mobile phone and a camera lens, characterized in that: Also includes the mobile phone protective case as claimed in claim 9.

Images