Panoramic ring lens and imaging system

Abstract

The application discloses a panoramic annular belt lens and an imaging system. The panoramic annular belt lens comprises a panoramic annular head unit and a subsequent lens group arranged from the object side to the image side. The panoramic annular head unit comprises a first lens and a second lens arranged in sequence from the object side to the image side, wherein the first lens is a meniscus lens with positive refractive power, and the second lens is a biconvex lens with positive refractive power; the convex surface of the first lens faces the object side, and the concave surface faces the image side; the subsequent lens group comprises a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, wherein the lenses in the third lens to the eighth lens form at least one group of cemented lens groups.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a panoramic ring-shaped lens and an imaging system. Background Art

[0002] The panoramic annular imaging system needs to complete the geometric transformation of objects within the ultra-large field of view onto the image sensor with a limited image surface at one time to obtain an annular area image with an ultra-large field of view.

[0003] The half field of view (FOV) is a key performance indicator for panoramic imaging systems. In surveillance, a wider FOV allows the camera to cover a larger area, reducing blind spots and improving safety. In virtual reality applications, a wider FOV provides a wider field of view, enhancing immersion and making users feel like they are in the virtual environment. In autonomous vehicles, a wider FOV provides a wider panoramic view of the vehicle's surroundings, helping the vehicle detect obstacles and pedestrians, improving driving safety.

[0004] In general, a wider field of view improves the practicality and efficiency of the panoramic annular imaging system, making it more advantageous in various application scenarios. This application provides a panoramic annular lens and imaging system. Compared with existing structures, the panoramic annular optical system of this application has a more compact structural design, better stray light control, and better workability, while further increasing the field of view of the annular imaging. Summary of the Invention

[0005] The present disclosure provides a panoramic annular lens and an imaging system to further increase the maximum field of view of annular imaging while ensuring a sufficient field of view angle range.

[0006] According to one aspect of the present application, a panoramic ring-shaped lens is provided, comprising: a panoramic ring-shaped head unit and a subsequent lens group arranged from the object side to the image side. The panoramic ring-shaped head unit comprises a first lens and a second lens arranged in sequence from the object side to the image side, wherein the first lens is a meniscus lens with positive optical power, and the second lens is a biconvex lens with positive optical power; the convex surface of the first lens faces the object side, and the concave surface faces the image side. The subsequent lens group comprises a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the image side. The lenses from the third lens to the eighth lens form at least one cemented lens group.

[0007] According to another aspect of the present application, a panoramic annular zone imaging system is provided, comprising the above panoramic annular zone lens and an image sensor, wherein the image sensor is located on the image side of the panoramic annular zone lens.

[0008] Therefore, the panoramic annular lens provided in this application can ensure that the panoramic annular imaging system using the panoramic annular lens has a more compact structural design, better stray light control and better processability, and has a larger field of view.

[0009] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0011] Figure 1 This is an optical structure diagram of the panoramic annular imaging system described in Example 1;

[0012] Figure 2 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 1;

[0013] Figure 3 is an MTF curve diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm;

[0014] Figure 4 is a standard spot diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm;

[0015] Figure 5 : This is a distortion diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm;

[0016] Figure 6 is an optical path difference diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm;

[0017] Figure 7 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm;

[0018] Figure 8 is a relative illumination curve of Example 1 under visible light 486-656nm;

[0019] Figure 9 This is an optical structure diagram of the panoramic annular imaging system described in Example 2;

[0020] Figure 10A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 2;

[0021] Figure 11 is an MTF curve diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm;

[0022] Figure 12 is a standard spot diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm;

[0023] Figure 13 This is a distortion diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm;

[0024] Figure 14 is an optical path difference diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm;

[0025] Figure 15 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm;

[0026] Figure 16 is a relative illumination curve of Example 2 under visible light 486-656nm;

[0027] Figure 17 This is an optical structure diagram of the panoramic annular imaging system described in Example 3;

[0028] Figure 18 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 3;

[0029] Figure 19 is an MTF curve diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm;

[0030] Figure 20 is a standard point diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm;

[0031] Figure 21 This is a distortion diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm;

[0032] Figure 22 is an optical path difference diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm;

[0033] Figure 23 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm;

[0034] Figure 24 is a relative illumination curve of Example 3 under visible light 486-656nm;

[0035] Figure 25 This is an optical structure diagram of the panoramic annular imaging system described in Example 4;

[0036] Figure 26 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 4;

[0037] Figure 27 is an MTF curve diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm;

[0038] Figure 28 is a standard spot diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm;

[0039] Figure 29 is a distortion diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm;

[0040] Figure 30 is an optical path difference diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm;

[0041] Figure 31 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm;

[0042] Figure 32 is a relative illumination curve of Example 4 under visible light 486-656nm;

[0043] Figure 33 This is an optical structure diagram of the snapshot panoramic annular imaging system described in Example 5;

[0044] Figure 34 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 5;

[0045] Figure 35 is an MTF curve graph of the panoramic annular imaging system described in Example 5 under visible light 486-656nm;

[0046] Figure 36 The snapshot is a standard spot diagram of the panoramic annular imaging system described in Example 5 under visible light 486-656nm;

[0047] Figure 37 This is a distortion diagram of the panoramic annular imaging system described in Example 5 under visible light 486-656nm;

[0048] Figure 38 is an optical path difference diagram of the panoramic annular imaging system described in Example 5 under visible light 486-656nm;

[0049] Figure 39 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 5 under visible light 486-656nm;

[0050] Figure 40 is a relative illumination curve of Example 5 under visible light 486-656nm;

[0051] Figure 41 This is an optical structure diagram of the panoramic annular imaging system described in Example 6;

[0052] Figure 42 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 6;

[0053] Figure 43 is an MTF curve graph of the panoramic annular imaging system described in Example 6 under visible light 486-656nm;

[0054] Figure 44 is a standard spot diagram of the panoramic annular imaging system described in Example 6 under visible light 486-656nm;

[0055] Figure 45 is a distortion diagram of the panoramic annular imaging system described in Example 6 under visible light 486-656nm;

[0056] Figure 46 is an optical path difference diagram of the panoramic annular imaging system described in Example 6 under visible light 486-656nm;

[0057] Figure 47 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 6 under visible light 486-656nm;

[0058] Figure 48 is a relative illumination curve of Example 6 under visible light 486-656nm;

[0059] Figure 49 This is an optical structure diagram of the panoramic annular imaging system described in Example 7;

[0060] Figure 50 A marking diagram of each surface along the optical path direction of the optical path snapshot in the panoramic annular imaging system described in Example 7;

[0061] Figure 51is an MTF curve graph of the panoramic annular imaging system described in Example 7 under visible light 486-656nm;

[0062] Figure 52 is a standard spot diagram of the panoramic annular imaging system described in Example 7 under visible light 486-656 nm;

[0063] Figure 53 is a distortion diagram of the panoramic annular imaging system described in Example 7 under visible light 486-656nm;

[0064] Figure 54 is an optical path difference diagram of the panoramic annular imaging system of Example 7 under visible light 486-656nm;

[0065] Figure 55 is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 7 under visible light 486-656 nm;

[0066] Figure 56 is a relative illumination curve of Example 7 under visible light 486-656nm;

[0067] Figure 57 This is an optical structure diagram of the panoramic annular imaging system described in Example 8;

[0068] Figure 58 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 8;

[0069] Figure 59 is an MTF curve graph of the panoramic annular imaging system described in Example 8 under visible light 486-656nm;

[0070] Figure 60 is a standard spot diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656 nm;

[0071] Figure 61 is a distortion diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm;

[0072] Figure 62 is an optical path difference diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm;

[0073] Figure 63 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm;

[0074] Figure 64 is a relative illumination curve of Example 8 under visible light 486-656nm;

[0075] Figure 65 This is a snapshot optical structure diagram of the panoramic annular imaging system described in Example 9;

[0076] Figure 66 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 9;

[0077] Figure 67 is an MTF curve graph of the panoramic annular imaging system described in Example 9 under visible light 486-656nm;

[0078] Figure 68 is a standard spot diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656 nm;

[0079] Figure 69 is a distortion diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656nm;

[0080] Figure 70 is an optical path difference diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656nm;

[0081] Figure 71 is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 9 under visible light 486-656 nm;

[0082] Figure 72 is a relative illumination curve of Example 9 under visible light 486-656nm;

[0083] Figure 73 This is an optical structure diagram of the panoramic annular imaging system described in Example 10;

[0084] Figure 74 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 10;

[0085] Figure 75 is an MTF curve graph of the panoramic annular imaging system described in Example 10 under visible light 486-656nm;

[0086] Figure 76 is a standard spot diagram of the panoramic annular imaging system described in Example 10 under visible light 486-656 nm;

[0087] Figure 77 is a distortion diagram of the panoramic annular imaging system described in Example 10 under visible light 486-656nm;

[0088] Figure 78is an optical path difference diagram of the snapshot panoramic annular imaging system described in Example 10 under visible light 486-656nm;

[0089] Figure 79 is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 10 under visible light 486-656 nm;

[0090] Figure 80 This is a relative illumination curve of Example 10 under visible light 486-656nm. DETAILED DESCRIPTION

[0091] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0092] In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present disclosure.

[0093] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present disclosure described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0094] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. DETAILED DESCRIPTION

[0096] Specifically, Figure 1 、 Figure 9 、 Figure 17 、Figure 25 、 Figure 33 、 Figure 41 、 Figure 49 、 Figure 57 、 Figure 65 、 Figure 73 Schematic diagrams of the panoramic annular imaging system according to embodiments 1 to 10 are shown respectively. The panoramic annular imaging system includes a panoramic annular lens.

[0097] As shown in the above figure, according to the first aspect of the present application, a panoramic ring-shaped lens is provided, which includes a panoramic ring-shaped head unit PAL and a subsequent lens group RL arranged from the object side to the image side.

[0098] The panoramic ring-shaped head unit consists of a first lens element (PAL1) and a second lens element (PAL2), arranged from the object side to the image side. First lens PAL1 is a positive meniscus lens, while second lens PAL2 is a positive biconvex lens. First lens PAL1 has its convex surface facing the object side and its concave surface facing the image side. The subsequent lens group consists of a third lens element (RL1), a fourth lens element (RL2), a fifth lens element (RL3), a sixth lens element (RL4), a seventh lens element (RL5), and an eighth lens element (RL6), arranged from the object side to the image side. Lenses RL1 through RL6 form at least one cemented lens group.

[0099] For example, reference Figure 9 、 Figure 17 、 Figure 25 、 Figure 33 、 Figure 41 、 Figure 49 and Figure 57 As shown, in Examples 1 to 8, the third lens RL1 and the fourth lens RL2 are cemented together to form a lens group, and the seventh lens RL5 and the eighth lens RL6 are cemented together to form a lens group.

[0100] refer to Figure 65 As shown, in Example 9, the third lens RL1 and the fourth lens RL2 are cemented together to form one lens group.

[0101] refer to Figure 73 As shown, in Example 10, the third lens RL1 and the fourth lens RL2 are cemented together to form a lens group, and the seventh lens RL5 and the eighth lens RL6 are cemented together to form a lens group.

[0102] Therefore, the panoramic annular lens provided by the present application can ensure that the panoramic annular imaging system using the panoramic annular lens has a larger field of view. Specifically, the minimum half field of view FOV of the panoramic annular imaging system using the panoramic annular lens is min Satisfy the condition: 40° <FOV min <55°.

[0103] Optionally, panoramic ring with head unit PAL total length TTL PAL The total length of the subsequent lens group RL is TTL RL Satisfy the conditions: Therefore, when the total length of the panoramic ring-belt lens head unit PAL is constant, the total length of the subsequent lens group RL is effectively limited, and the total length of the entire lens is compressed, which is conducive to the miniaturization, lightweight and low cost of the panoramic ring-belt optical lens.

[0104] Optionally, the mechanical semi-aperture D of the first lens PAL1 PAL1 Total length of the successor lens group with the panoramic ring lens TTL 后继镜组 Satisfy the conditions: Therefore, satisfying this conditional expression can effectively limit the aperture and mass of the lens of the panoramic ring belt head unit, ensuring that the center of gravity of the lens is not too concentrated at the upper end, which is beneficial to the processing, assembly and structural stability of the lens.

[0105] Optionally, the curvature radius R of the object-side surface of the first lens element PAL1 is A1 and the curvature radius R of the image-side surface of the first lens PAL1 A2 Satisfy the conditions: Satisfying this condition can, on the one hand, ensure that the object-side profile of the first lens element PAL1 is in a relatively reasonable state, making lens processing more reliable and easier to implement; on the other hand, it can reduce the degree of deflection of light incident on the first lens element PAL1 from the outside, which is beneficial to expanding the field of view of the imaging system and subsequently suppressing stray light.

[0106] Optionally, the mechanical semi-aperture D of the first lens PAL1 PAL1 and the mechanical semi-aperture D of the second lens PAL2 PAL2 Satisfy the conditions: Therefore, satisfying this conditional expression can ensure that the apertures of the two lenses of the panoramic ring-band head unit are matched within a reasonable range, which is conducive to the deflection of light with a large field of view angle, while also ensuring the machinability of the lens.

[0107] Optionally, the curvature radius R of the object side surface of the second lens (PAL2) A2 and the curvature radius R of the image side surface of the second lens (PAL2) A3 Satisfy the conditions: Therefore, satisfying this conditional expression can achieve a higher yield in the bonding process of the first lens (PAL1) and the second lens (PAL2), while also controlling the aperture of the second lens (PAL2) and ensuring a compact structure.

[0108] Optionally, the inner diameter D of the image-side reflective annulus of the second lens (PAL2) is A3内孔径 and the image side projection aperture D of the second lens (PAL2) A8 Satisfy the condition: 0.30<D A3内孔径 -D A8 <1.90. Therefore, satisfying this conditional expression can ensure that the reflective annular coating process of the second lens element (PAL2) on the image side has sufficient processing redundancy, reduce the processing difficulty, and at the same time control the possible transmitted stray light on this side.

[0109] In addition, reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 As shown, according to another aspect of the present application, a panoramic annular imaging system is provided. The system comprises any one of the panoramic annular lenses described above and an image sensor SEN. The image sensor SEN is located on the image side of the panoramic annular lens.

[0110] Optionally, the minimum half field of view FOV of the panoramic annular imaging system min Condition: 40° <FOV min <55°. Further preferably, the maximum half field of view FOV max Satisfy the condition: 110° <FOV max <120°. Therefore, satisfying this conditional expression can ensure a sufficient field of view angle range, further increasing the maximum field of view angle of the annular imaging, providing a larger object observation range for scene recognition services, and thus improving the observation efficiency of a single imaging.

[0111] Optionally, half the diagonal length ImgH of the effective pixel area on the imaging surface of the panoramic annular imaging system and the absolute value of the effective focal length |f| of the panoramic annular imaging system satisfy the conditional expression: Therefore, by satisfying this condition, a larger object range can be imaged onto the image plane through the panoramic annular imaging system while ensuring clear imaging, thereby improving the observation efficiency of single imaging to a certain extent and providing more effective object information.

[0112] Table 1 below shows relevant data of the panoramic annular imaging system described in Examples 1 to 10:

[0113] Table 1

[0114]

[0115] Example 1

[0116] Figure 11 This is an optical structure diagram of the panoramic annular imaging system described in Example 1; Figure 12 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 1; Figure 13 is an MTF (Modulation Transfer Function) curve of the panoramic annular imaging system described in Example 1 under visible light 486-656nm; Figure 14 is a standard spot diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm; Figure 15 : This is a distortion diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm; Figure 16 is an optical path difference diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm; Figure 17 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 1 under visible light 486-656nm; Figure 18 This is a relative illumination curve of Example 1 under visible light 486-656nm.

[0117] In addition, the following Table 2 shows the parameters of each optical surface of the panoramic annular imaging system described in Example 1:

[0118] Table 2

[0119]

[0120]

[0121] Example 2

[0122] Figure 19 This is an optical structure diagram of the panoramic annular imaging system described in Example 2; Figure 20 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 2; Figure 21 is an MTF curve diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm; Figure 22 is a standard spot diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm; Figure 23 This is a distortion diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm; Figure 24 is an optical path difference diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm; Figure 25 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 2 under visible light 486-656nm; Figure 26This is a relative illumination curve of Example 2 under visible light 486-656nm.

[0123] Example 3

[0124] Figure 27 This is an optical structure diagram of the panoramic annular imaging system described in Example 3; Figure 28 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 3; Figure 29 is an MTF curve diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm; Figure 30 is a standard point diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm; Figure 31 This is a distortion diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm; Figure 32 is an optical path difference diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm; Figure 33 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 3 under visible light 486-656nm; Figure 34 This is a relative illumination curve of Example 3 under visible light 486-656nm.

[0125] Example 4

[0126] Figure 35 This is an optical structure diagram of the panoramic annular imaging system described in Example 4; Figure 36 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 4; Figure 37 is an MTF curve diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm; Figure 38 is a standard spot diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm; Figure 39 is a distortion diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm; Figure 40 is an optical path difference diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm; Figure 41 is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 4 under visible light 486-656nm; Figure 42 This is a relative illumination curve of Example 4 under visible light 486-656nm.

[0127] Example 5

[0128] Figure 43 This is an optical structure diagram of the snapshot panoramic annular imaging system described in Example 5; Figure 44Label map of surfaces along the optical path direction for the panoramic ring belt imaging system described in Example 5; Figure 45 MTF plot for the panoramic ring belt imaging system described in Example 5 at visible light 486-656 nm; Figure 46 Spot diagram for the panoramic ring belt imaging system described in Example 5 at visible light 486-656 nm; Figure 47 Distortion plot for the panoramic ring belt imaging system described in Example 5 at visible light 486-656 nm; Figure 48 OPD plot for the panoramic ring belt imaging system described in Example 5 at visible light 486-656 nm; Figure 49 Lateral color plot for the panoramic ring belt imaging system described in Example 5 at visible light 486-656 nm; Figure 50 Relative illumination plot for Example 5 at visible light 486-656 nm.

[0129] Example 6

[0130] Figure 51 Optical layout for the panoramic ring belt imaging system described in Example 6; Figure 52 Label map of surfaces along the optical path direction for the panoramic ring belt imaging system described in Example 6; Figure 53 MTF plot for the panoramic ring belt imaging system described in Example 6 at visible light 486-656 nm; Figure 54 Spot diagram for the panoramic ring belt imaging system described in Example 6 at visible light 486-656 nm; Figure 55 Distortion plot for the panoramic ring belt imaging system described in Example 6 at visible light 486-656 nm; Figure 56 OPD plot for the panoramic ring belt imaging system described in Example 6 at visible light 486-656 nm; Figure 57 Lateral color plot for the panoramic ring belt imaging system described in Example 6 at visible light 486-656 nm; Figure 58 Relative illumination plot for Example 6 at visible light 486-656 nm.

[0131] Example 7

[0132] Figure 59 Optical layout for the panoramic ring belt imaging system described in Example 7; Figure 60 Label map of surfaces along the optical path direction for the panoramic ring belt imaging system described in Example 7; Figure 61 MTF plot for the panoramic ring belt imaging system described in Example 7 at visible light 486-656 nm; Figure 62 Spot diagram for the panoramic ring belt imaging system described in Example 7 at visible light 486-656 nm;Figure 63 is a distortion diagram of the panoramic annular imaging system described in Example 7 under visible light 486-656nm; Figure 64 is an optical path difference diagram of the panoramic annular imaging system of Example 7 under visible light 486-656nm; Figure 65 is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 7 under visible light 486-656 nm; Figure 66 This is a relative illumination curve of Example 7 under visible light 486-656nm.

[0133] Example 8

[0134] Figure 67 This is an optical structure diagram of the panoramic annular imaging system described in Example 8; Figure 68 A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 8; Figure 69 is an MTF curve graph of the panoramic annular imaging system described in Example 8 under visible light 486-656nm; Figure 70 is a standard spot diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656 nm; Figure 71 is a distortion diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm; Figure 72 is an optical path difference diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm; Face No. is a magnification chromatic aberration diagram of the panoramic annular imaging system described in Example 8 under visible light 486-656nm; Curvature Semi (mm) This is a relative illumination curve of Example 8 under visible light 486-656nm.

[0135] Example 9

[0136] Center Thickness (mm) This is a snapshot optical structure diagram of the panoramic annular imaging system described in Example 9; Refractive Index A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 9; Abbe Number is an MTF curve graph of the panoramic annular imaging system described in Example 9 under visible light 486-656nm; Effective Semi Aperture (mm) is a standard spot diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656 nm; STOP is a distortion diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656nm; INFINITY is an optical path difference diagram of the panoramic annular imaging system described in Example 9 under visible light 486-656nm; INFINITY is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 9 under visible light 486-656 nm;Figure 73 This is a relative illumination curve of Example 9 under visible light 486-656nm.

[0137] Table 3 below shows the parameters of the panoramic annular imaging system described in Example 9:

[0138] Table 3

[0139] Figure 74 Figure 75 Figure 76 Figure 77 Figure 78 Figure 79 A1 12.00～13.50 4.55 1.58～1.62 36～40 9.00～10.00 A2 18.30～20.30 5.48 1.63～1.69 49～53 9.00～10.00 A3 -7.60～-6.80 -5.48 1.0 5.50～6.30 A4 18.30～20.30 -4.55 1.58～1.62 36～40 4.50～5.00 A5 12.00～13.50 1.04 1.58～1.62 36～40 1.00～1.50 A6 -7.60～-6.80 3.51 1.0 1.50～2.00 A7 18.30～20.30 5.48 1.63～1.69 49～53 1.50～1.80 A8 -7.60～-6.80 2.48 1.40～1.60 B1 -2.80～-2.10 1.50 1.78～1.83 23～28 0.90～1.20 B2 4.00～4.90 1.30 1.58～1.62 57～61 1.10～1.40 B3 -4.60～-3.80 0.55 1.20～1.60 Figure 80 ​ 0.54 1.20～1.60 C1 18.00～23.00 1.72 1.83～1.87 28～32 1.40～1.80 C2 -9.10～-7.50 2.50 1.60～2.00 D1 7.80～9.20 1.30 1.58～1.62 54～58 1.70～2.10 D2 -19.00～-16.00 0.55 1.60～2.00 E1 2.50～3.50 0.93 1.70～1.76 53～57 1.40～1.80 E2 11.00～14.00 0.56 1.30～1.60 F1 110.00～127.00 0.54 1.89～1.95 19～23 1.00～1.30 F2 1.40～2.00 3.09 0.80～1.20 G1 ​ - 1.10～1.30

[0140] Example 10

[0141] ​ This is an optical structure diagram of the panoramic annular imaging system described in Example 10; ​ A marking diagram of each surface along the optical path in the panoramic annular imaging system described in Example 10; ​ is an MTF curve graph of the panoramic annular imaging system described in Example 10 under visible light 486-656nm; ​ is a standard spot diagram of the panoramic annular imaging system described in Example 10 under visible light 486-656 nm; ​ is a distortion diagram of the panoramic annular imaging system described in Example 10 under visible light 486-656nm; ​ is an optical path difference diagram of the snapshot panoramic annular imaging system described in Example 10 under visible light 486-656nm; ​ is a graph of magnification chromatic aberration of the panoramic annular imaging system described in Example 10 under visible light 486-656 nm; ​ This is a relative illumination curve of Example 10 under visible light 486-656nm.

[0142] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0143] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0144] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0145] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A panoramic ring lens, characterized in that: include: The panoramic ring head unit (PAL) and the subsequent lens group (RL) are arranged from the object side to the image side, among which, The panoramic ring belt head unit is composed of a first lens (PAL1) and a second lens (PAL2) arranged in sequence from the object side to the image side, wherein the first lens (PAL1) is a meniscus lens with positive optical power, and the second lens (PAL2) is a biconvex lens with positive optical power; the convex surface of the first lens (PAL1) faces the object side, and the concave surface faces the image side, and The subsequent lens group is composed of a third lens (RL1), a fourth lens (RL2), a fifth lens (RL3), a sixth lens (RL4), a seventh lens (RL5) and an eighth lens (RL6) arranged in sequence from the object side to the image side, wherein the lenses from the third lens (RL1) to the eighth lens (RL6) form at least one cemented lens group; The inner diameter of the reflection annulus on the image side of the second lens (PAL2) and the image side projection aperture of the second lens (PAL2) Satisfy the condition: 0.30< <1.

90.

2. The panoramic ring-shaped lens according to claim 1, characterized in that: Total length of the panoramic ring with head unit (PAL) and the total length of the subsequent lens group (RL) Satisfy the conditions: 0.32< <0.79。 3. The panoramic ring-shaped lens according to claim 1, characterized in that: The mechanical semi-aperture of the first lens (PAL1) and the total length of the subsequent lens group (RL) Satisfy the condition: 0.32< <0.

78.

4. The panoramic ring-shaped lens according to claim 1, characterized in that: The curvature radius of the object side surface of the first lens (PAL1) and the curvature radius of the image-side surface of the first lens (PAL1) Satisfy the condition: 0.39 < <0.

73.

5. The panoramic ring-shaped lens according to claim 1, characterized in that: The mechanical semi-aperture of the first lens (PAL1) and the mechanical half-aperture of the second lens (PAL2) Satisfy the condition: 1.30 < <2.

49.

6. The panoramic ring-shaped lens according to claim 1, characterized in that: The curvature radius of the object side surface of the second lens (PAL2) and the curvature radius of the image side surface of the second lens (PAL2) Satisfy the condition: 2.11 < <4.

78.

7. A panoramic annular imaging system, characterized in that: The invention comprises the panoramic ring-shaped lens according to any one of claims 1 to 6 and an image sensor (SEN), wherein the image sensor (SEN) is located on the image side of the panoramic ring-shaped lens.

8. The panoramic annular imaging system according to claim 7, characterized in that: The minimum half field of view angle of the panoramic annular imaging system Satisfy the condition: 40°< < 55°.

9. The panoramic annular imaging system according to claim 7, characterized in that: Half the diagonal length of the effective pixel area on the imaging surface of the panoramic annular imaging system and the absolute value of the effective focal length of the panoramic annular imaging system Satisfy the conditions: > 1.8.

Images