Periscopic lens

Abstract

The application relates to a periscopic lens comprising a lens barrel and first to sixth lenses arranged in order from the object side to the image side of the lens barrel, a reflector is located between the first and second lenses, and a bearing element group comprises a second bearing element abutting against the image side of the second lens and a third bearing element abutting against the image side of the third lens, the first lens has positive focal power, the positive focal power and the negative focal power of the second lens and the third lens are different, the fourth lens and / or the fifth lens has positive focal power, and the sixth lens has negative focal power. The curvature radiuses R1 and R2 of the object side and the image side of the first lens, the refractive index N1 of the first lens, the image side outer diameter D3m of the third bearing element, the object side inner diameter d3s of the third bearing element, the image side outer diameter D2m of the second bearing element and the object side inner diameter d2s of the second bearing element meet the following conditions: 1.25 lt; r1 / R2 * N1 is smaller than or equal to 1.5, 1.05 lt; (D3m-d3s) / (D2m-d2s) lt; and 2.70.

Description

Technical Field

[0001] This utility model relates to the field of periscope lens technology, and in particular to a periscope lens. Background Technology

[0002] In recent years, with the continuous advancement of technology and the continuous improvement of production capacity, the internal focusing periscope lens with the reflector in the center has gradually become a standard feature of flagship mobile phones.

[0003] Lenses in a lens typically consist of a light-transmitting body with a radius of curvature and a non-light-transmitting body surrounding the light-transmitting body. The light-transmitting bodies of multiple lenses form the structural core of the optical system, while the non-light-transmitting body is used to connect to the lens barrel and fix the light-transmitting body. The non-light-transmitting body also has at least an object-side surface, an image-side surface, and an outermost edge surface located on the entire lens. A chamfered surface is usually provided between the edge surface and the object-side surface, and between the edge surface and the image-side surface, to prevent cuts. For multiple lenses in a focusing lens group, the lens closer to the reflecting mirror is more likely to receive light with a high angle of incidence, and therefore, the light is more likely to enter the non-light-transmitting body. When light enters the non-light-transmitting body, it will inevitably be reflected on multiple inner surfaces of the non-light-transmitting body (object-side surface, image-side surface, edge surface, chamfered surface). If this light ultimately exits on the image side of the lens, it is likely to enter the image along with the effective light used for imaging, resulting in visible stray light in the image. Utility Model Content

[0004] Given the serious stray light problem in the images produced by existing periscope lenses, it is necessary to provide a new type of periscope lens.

[0005] A periscope lens, comprising:

[0006] The first lens tube has a first central axis;

[0007] The second lens tube has a second central axis that intersects with the first central axis;

[0008] The first lens group includes a first lens mounted on the first lens barrel. The first lens has positive optical power, and the object side and image side of the first lens are convex and concave, respectively.

[0009] A second lens group is mounted on the second lens barrel. The second lens group includes a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially and coaxially along the object-side end face to the image-side end face of the second lens barrel. The object-side surface of the second lens is convex, and the image-side surface of the third lens is concave. One of the second lens and the third lens has positive optical power, while the other has negative optical power. The fourth lens and / or the fifth lens has positive optical power, and the sixth lens has negative optical power.

[0010] A reflecting mirror, which is located between the first lens and the second lens and is arranged obliquely to the first central axis and the second central axis, is configured to reflect the light emitted from the image-side end face of the first lens barrel to the second lens; and

[0011] A bearing element group includes a second bearing element disposed on the image side of the second lens and abutting against the image-side surface of the second lens, and a third bearing element disposed on the image side of the third lens and abutting against the image-side surface of the third lens;

[0012] The following relationships are satisfied among the object-side curvature radius R1 of the first lens, the image-side curvature radius R2 of the first lens, the refractive index N1 of the first lens, the image-side outer diameter D3m of the third bearing element, the object-side inner diameter d3s of the third bearing element, the image-side outer diameter D2m of the second bearing element, and the object-side inner diameter d2s of the second bearing element:

[0013] 1.25 < R1 / R2 * N1 ≤ 1.5; and

[0014] 1.05 < (D3m - d3s) / (D2m - d2s) < 2.70.

[0015] With such a setting, in this application, a reflecting mirror is placed between the first lens and the second lens to achieve the function of redirecting the optical path in a periscope lens. By limiting the object-side curvature radius, the image-side curvature radius, and the refractive index of the first lens through the above conditional formula, the light incident amount is ensured, and the imaging image quality is guaranteed. The material of the first lens and the surface shapes on the object and image sides affect the optical path between the first lens, the reflecting mirror, and the second lens. Especially under the limitation of this conditional formula, light is likely to be reflected twice on the inner and outer surfaces of the second lens and the third lens, and stray light is likely to be generated when light enters the structural area (non-transmissive main body) at the edge of the lens. Based on this, by restricting the inner diameter dimensions of the second bearing element and the third bearing element, the internal reflection stray light generated by the second lens and the third lens can be blocked, thereby reducing the stray light risk and improving the image quality.

[0016] In one embodiment, the second lens barrel is slidably disposed on the image side of the first lens barrel along the optical axis, and the object distance range of the periscope lens is from infinity to 150 mm.

[0017] In one embodiment, the following relationships are satisfied among the effective focal length fa of the periscope lens in the infinity state, the axial distance Y1 from the intersection of the object-side surface of the first lens and the optical axis to the reflecting surface of the reflecting mirror, the axial distance X2 from the object-side surface of the second lens to the image-side surface of the sixth lens, and the maximum length X of the periscope lens along the second central axis: 0.65 < fa / (X2 + Y1) < 0.73, 19.45 mm < X < 21.40 mm.

[0018] In one embodiment, the maximum thickness B1 of the first lens barrel and the maximum thickness B2 of the object-side end face of the second lens barrel satisfy the following condition: 1.00 mm. <B1+B2≤1.45mm。

[0019] In one embodiment, the distance EP02 from the object-side end face of the second lens barrel to the object-side side face of the second support element along the optical axis, the spacing EP23 between the second support element and the third support element along the optical axis, the center thickness CT2 of the second lens, and the center thickness CT3 of the third lens satisfy the following: 0.90 < (EP02 + EP23) / (CT2 + CT3) < 1.20.

[0020] In one embodiment, the spacing EP23 between the second and third supporting elements along the optical axis, the center thickness CT3 of the third lens, the on-axis air gap T23 between the second and third lenses, and the maximum thickness CP2 of the second supporting element satisfy the following condition: 3.95 <EP23 / CT3+T23 / CP2≤11.20。

[0021] In one embodiment, the supporting element group further includes a fourth supporting element disposed on the image side of the fourth lens and abutting against the image side surface of the fourth lens;

[0022] The object-side inner diameter d2s of the second supporting element, the object-side outer diameter D4s of the fourth supporting element, and the image-side inner diameter d2m of the second supporting element satisfy the following relationship: 2.85 <d2s / (D4s-d2m)<3.50。

[0023] In one embodiment, the supporting element group further includes a fifth supporting element disposed on the image side of the fifth lens and abutting against the image side surface of the fifth lens;

[0024] The image-side outer diameter D5m of the fifth supporting element, the object-side inner diameter d5s of the fifth supporting element, the image-side outer diameter D4m of the fourth supporting element, and the object-side inner diameter d4s of the fourth supporting element satisfy the following condition: 0.70 < (D5m - d5s) / (D4m - d4s) < 1.65.

[0025] In one embodiment, the maximum height Lb of the second lens barrel along the second central axis, the distance EP34 between the third and fourth supporting elements along the optical axis, and the distance EP45 between the fourth and fifth supporting elements along the optical axis satisfy the following condition: 2.05 <Lb / (EP34+EP45)<3.30。

[0026] In one embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the image-side inner diameter d5m of the fifth bearing element, and the image-side inner diameter d3m of the third bearing element satisfy the following: 35.2≤f45 / |d5m-d3m|≤46.15.

[0027] In one embodiment, the object-side inner diameter d4s of the fourth bearing element, the object-side inner diameter d5s of the fifth bearing element, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy the following condition: 3.10mm < (d4s + d5s) / (N4 + N5) < 3.80mm.

[0028] In one embodiment, the distance EP34 between the third and fourth supporting elements along the optical axis and the center thickness CT4 of the fourth lens satisfy the following condition: 0.95. <EP34 / CT4≤1.20。

[0029] In one embodiment, the on-axis air gap T23 between the second lens and the third lens, the on-axis air gap T34 between the third lens and the fourth lens, the sum of the maximum thicknesses of all supporting elements between the second lens and the third lens ∑CP2, and the sum of the maximum thicknesses of all supporting elements between the third lens and the fourth lens ∑CP3 satisfy the following condition: 3.05 < (T23 + T34) / (∑CP2 + ∑CP3) ≤ 16.75. Attached Figure Description

[0030] Figure 1 A schematic diagram of the optical path for a periscope lens that satisfies R1 / R2*N1=1.28 and (D3m-d3s) / (D2m-d2s)=1.01;

[0031] Figure 2 A schematic diagram of the optical path for a periscope lens that satisfies R1 / R2*N1=1.28 and (D3m-d3s) / (D2m-d2s)=3.20;

[0032] Figure 3 A schematic diagram of the optical path in a periscope lens provided in this application;

[0033] Figure 4A for Figure 3 A schematic diagram showing the dimensions of the first barrel, first lens, and reflector in the periscope lens shown.

[0034] Figure 4B for Figure 3 A schematic diagram showing the dimensions of the second lens barrel, the second lens group, and the supporting element group in the periscope lens shown.

[0035] Figure 4C forFigure 3 A schematic diagram showing the dimensions of the periscope lens;

[0036] Figure 5A These are schematic diagrams of the periscope lens in working condition 1-1 when the object distance is infinite.

[0037] Figure 5B These are schematic diagrams of the periscope lens in working condition 1-1 at an object distance of 150mm.

[0038] Figure 6A These are schematic diagrams of the periscope lens in working conditions 1-2, when the object distance is infinite.

[0039] Figure 6B These are schematic diagrams of the periscope lens in working conditions 1-2 at an object distance of 150mm.

[0040] Figure 7A These are schematic diagrams of the periscope lens in working conditions 1-3, respectively, when the object distance is infinite.

[0041] Figure 7B These are schematic diagrams of the periscope lens in working conditions 1-3 at an object distance of 150mm.

[0042] Figure 8A This is an astigmatism curve of the periscope lens in Example 1 at an infinite object distance;

[0043] Figure 8B This is a distortion curve of the periscope lens in Example 1 when the object distance is infinite.

[0044] Figure 9A These are schematic diagrams of the periscope lens in working condition 2-1 when the object distance is infinite.

[0045] Figure 9B The diagram shows the structure of the periscope lens in working condition 2-1 at an object distance of 150mm.

[0046] Figure 10A These are schematic diagrams of the periscope lens in working condition 2-2 when the object distance is infinite.

[0047] Figure 10B The diagram shows the structure of the periscope lens in working condition 2-2 at an object distance of 150mm.

[0048] Figure 11A These are schematic diagrams of the periscope lens in working conditions 2-3, when the object distance is infinite.

[0049] Figure 11B The diagram shows the structure of the periscope lens in working conditions 2-3 at an object distance of 150mm.

[0050] Figure 12A This is the astigmatism curve of the periscope lens in Example 2 when the object distance is infinite;

[0051] Figure 12B This is a distortion curve of the periscope lens in Example 2 when the object distance is infinite.

[0052] Figure 13A These are schematic diagrams of the periscope lens in working condition 3-1 when the object distance is infinite.

[0053] Figure 13B These are schematic diagrams of the periscope lens in working condition 3-1 at an object distance of 150mm.

[0054] Figure 14A These are schematic diagrams of the periscope lens in working condition 3-2 when the object distance is infinite.

[0055] Figure 14B These are schematic diagrams of the periscope lens in working condition 3-2 at an object distance of 150mm.

[0056] Figure 15A These are schematic diagrams of the periscope lens in working condition 3-3 when the object distance is infinite.

[0057] Figure 15B These are schematic diagrams of the periscope lens in working condition 3-3 at an object distance of 150mm.

[0058] Figure 16A This is the astigmatism curve of the periscope lens in Example 3 when the object distance is infinite;

[0059] Figure 16B This is a distortion curve of the periscope lens in Example 3 when the object distance is infinite.

[0060] Figure 17A Test spot diagram for a periscope lens when R1 / R2*N1=1.28 and (D3m-d3s) / (D2m-d2s)=1.01;

[0061] Figure 17B Test spot diagram for a periscope lens when R1 / R2*N1=1.28 and (D3m-d3s) / (D2m-d2s)=1.08;

[0062] Figure 17C Test spot diagram for a periscope lens when R1 / R2*N1=1.28 and (D3m-d3s) / (D2m-d2s)=3.20.

[0063] Figure label:

[0064] P01, First lens barrel; P02, Second lens barrel; E1, First lens; E2, Second lens; E3, Third lens; E4, Fourth lens; E5, Fifth lens; E6, Sixth lens; P2, Second support element; P3, Third support element; P4, Fourth support element; P5, Fifth support element; P3b, Third auxiliary support element; P3c, Third auxiliary support element; P4b, Fourth auxiliary support element; P4c, Fourth auxiliary support element. Detailed Implementation

[0065] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0066] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0071] In recent years, with the continuous advancement of technology and the continuous improvement of production capacity, the internal focusing periscope lens with the reflector in the center has gradually become a standard feature of flagship mobile phones.

[0072] A lens in a lens typically consists of a light-transmitting main body and a non-light-transmitting main body surrounding it. The light-transmitting main bodies of multiple lenses constitute the structural core of the optical system, while the non-light-transmitting main body is used to connect to the lens barrel and fix the light-transmitting main body. The non-light-transmitting main body also has at least an object-side surface, an image-side surface, and an outermost edge surface located on the entire lens. A chamfered surface is usually provided between the edge surface and the object-side surface, and between the edge surface and the image-side surface, to prevent cuts. For multiple lenses in a focusing lens group, the lens closer to the reflecting mirror is more likely to receive light with a high angle of incidence, and therefore, the light is more likely to enter the non-light-transmitting main body. When light enters the non-light-transmitting main body, it will inevitably be reflected on multiple inner surfaces of the non-light-transmitting main body (object-side surface, image-side surface, edge surface, chamfered surface). If this light ultimately exits on the image side of the lens, it is likely to enter the image along with the effective light used for imaging, resulting in visible stray light in the image.

[0073] Therefore, it is necessary to provide a periscope lens that can eliminate stray light caused by internal reflections at the lens edge.

[0074] Please see Figure 3 , Figure 4A , Figure 4B , Figure 4C , Figure 3 This is a schematic diagram of the periscope lens in one embodiment of the present invention. Figure 4A for Figure 3 The diagram shows the dimensions of the first lens barrel P01, the first lens E1, and the reflecting mirror Rm in the periscope lens. Figure 4B for Figure 3 A schematic diagram showing the dimensions of the second lens barrel P02, the second lens group, and the supporting element group in the periscope lens. Figure 4C for Figure 3 The diagram showing the dimensions of the periscope lens is noteworthy. It's important to note that, besides... Figure 4C In addition to X representing the length of the periscope lens, Y and X in the other figures represent the extension directions of the first and second central axes, respectively. The periscope lens provided in this application includes two lens barrels, six lens elements, a reflector, and several supporting elements:

[0075] The first lens tube P01 has a first central axis;

[0076] The second lens tube P02 has a second central axis that intersects with the first central axis. In this application, an embodiment in which the first central axis and the second central axis are perpendicular is used for illustration.

[0077] The first lens group includes a first lens E1 mounted on the first lens barrel P01. The first lens E1 has positive optical power, and the object side and image side of the first lens E1 are convex and concave, respectively.

[0078] The second lens group is installed on the second lens barrel P02, including a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially and coaxially along the object-side end face to the image-side end face of the second lens barrel P02. The object-side surface of the second lens E2 is convex, and the image-side surface of the third lens E3 is concave. One of the second lens E2 and the third lens E3 has positive optical power and the other has negative optical power. The fourth lens E4 and / or the fifth lens E5 have positive optical power, and the sixth lens E6 has negative optical power. The outer edges of the second lens E2 to the sixth lens E6 abut against the stepped surface of the second lens barrel P02 to increase the stability of the connection between the lens and the lens barrel.

[0079] The mirror Rm is located between the first lens E1 and the second lens E2 and is arranged obliquely to the first central axis and the second central axis, for reflecting the light emitted from the image-side end face of the first lens barrel P01 to the second lens E2;

[0080] The bearing element group includes a total of four bearing elements from the second to the fifth. The second bearing element P2 is placed on the image side of the second lens E2 and abuts against the image-side surface of the second lens E2. The third bearing element P3 is placed on the image side of the third lens E3 and abuts against the image-side surface of the third lens E3. The fourth bearing element P4 is placed on the image side of the fourth lens E4 and abuts against the image-side surface of the fourth lens E4. The fifth bearing element P5 is placed on the image side of the fifth lens E5 and abuts against the image-side surface of the fifth lens E5;

[0081] To solve the problem of stray light in the image caused by light reflection at the edges of the lenses in this periscope lens, the following relationships are satisfied among the object-side curvature radius R1 of the first lens E1, the image-side curvature radius R2 of the first lens E1, the refractive index N1 of the first lens E1, the image-side outer diameter D3m of the third bearing element P3, the object-side inner diameter d3s of the third bearing element P3, the image-side outer diameter D2m of the second bearing element P2, and the object-side inner diameter d2s of the second bearing element P2:

[0082] 1.25 < R1 / R2 * N1 ≤ 1.5; and

[0083] 1.05 < (D3m - d3s) / (D2m - d2s) < 2.70.

[0084] In this application, the mirror Rm is placed between the first lens E1 and the second lens E2 to achieve the function of redirecting the optical path in the periscope lens. By limiting and constraining the object-side curvature radius, image-side curvature radius, and refractive index of the first lens E1 through the above conditional formula, the light input amount is ensured, and the imaging image quality is guaranteed. The material of the first lens (usually made of glass material) and the surface profiles on the object and image sides affect the optical path between the first lens E1, the mirror Rm, and the second lens E2. Especially under the limitation of the first conditional formula, light is likely to undergo secondary reflection on the inner and outer surfaces of the second lens E2 and the third lens E3, and stray light is likely to occur when light enters the structural area (non-transmissive main body) at the edge of the lens. Specifically, as Figure 1 and Figure 2 shown, Figure 1 FIG. is a schematic diagram of the lens optical path when the first lens E1, the second bearing element P2, and the third bearing element P3 satisfy the conditional formula R1 / R2 * N1 = 1.28 and (D3m - d3s) / (D2m - d2s) = 1.01; Figure 2 FIG. is a schematic diagram of the lens optical path when the first lens E1, the second bearing element P2, and the third bearing element P3 satisfy R1 / R2 * N1 = 1.28 and (D3m - d3s) / (D2m - d2s) = 3.20. Just asFigure 1 As shown in the optical path diagram, when conditional equation two exceeds the lower limit, the light entering the third lens E3 will be reflected multiple times on the inner surface of the non-lens body of the third lens 3E, and will eventually exit from the image side of the third lens E3 and enter the image; as Figure 2 As shown in the optical path diagram, when condition two exceeds the upper limit, the light is reflected on the image side of the second lens E2 and enters the non-transparent body of the second lens E2. After multiple reflections, it finally exits from the image side of the second lens E2 and arrives at the image sensor behind the lens together with the effective light in the lens. The aforementioned effective light is the light that passes through the transparent bodies of the first lens E1 to the sixth lens E6 in sequence without being reflected between the lenses. To address this internal reflection stray light problem, this application further restricts the relationship between the inner diameters of the object and image sides of the second support element P2 and the inner diameters of the object and image sides of the third support element P3 to prevent the generation and further transmission of this internal reflection stray light, ensuring that the light in the lens can only pass through the transparent bodies of the second and third lenses in sequence and arrive at the image sensor, thereby reducing the risk of stray light and improving image quality.

[0085] Please see Figures 17A-17C , Figure 17A and Figure 17C They are respectively Figure 1 and Figure 2 The test spot pattern of the periscope lens is shown below. Figure 17B The test spot pattern is shown for a periscope lens when R1 / R2*N1 = 1.28 and (D3m-d3s) / (D2m-d2s) = 1.08. A comparison shows that... Figure 17B The number of stray light spots in the test light spot diagram shown is significantly less than that of the number of stray light spots. Figure 17A and Figure 17C The number of stray light spots in the periscope lens is reduced. Therefore, when the periscope lens size is designed according to the two conditions provided in this application, the stray light in the test spot pattern is less while ensuring the brightness of the image, resulting in better image quality.

[0086] Optionally, in one embodiment provided in this application, the second lens barrel P02 is slidably disposed on the image side of the reflecting mirror Rm along the optical axis, and the object distance of the periscope lens ranges from infinity to 150mm. By adjusting the distance of the second lens barrel P02 relative to the reflecting mirror R and the first lens barrel P01, the distance between the first lens E1 and the second lens E2 on the optical axis can be adjusted to achieve the focal length adjustment of the entire periscope lens, thus completing the internal focusing function of the system. Specifically, the second lens barrel P02 has an outer ring surface and an inner ring surface, wherein the inner ring surface is stepped for corresponding abutment with each lens, thereby increasing the stability of the second lens group installation, while the outer ring surface is provided with a microstructure for connection with an external drive mechanism.

[0087] Optionally, in an embodiment provided by the present application, the effective focal length fa of the periscope lens in the infinite focus state, the axial distance Y1 from the intersection of the object side surface of the first lens E1 and the optical axis to the reflecting surface of the reflecting mirror Rm, the axial distance X2 from the object side surface of the second lens E2 to the image side surface of the sixth lens E6, and the maximum length X of the periscope lens along the second central axis satisfy: 0.65 < fa / (X2 + Y1) < 0.73, 19.45 mm < X < 21.40 mm. On the premise that the effective focal length f of the optical system meets the design specification requirements, light is incident through the first lens E1, and the optical path is changed through the reflecting mirror Rm. At the same time, the second lens barrel P02 realizes zooming to the infinite focus state through the displacement in the optical axis direction. At this time, it is necessary to satisfy 0.65 < fa / (X2 + Y1) < 0.73. This conditional formula can ensure the stability of the gap change of each lens group and ensure the mechanical reliability of the system. At the same time, the maximum length needs to satisfy 19.45 mm < X < 21.40 mm, making the lens tend to a miniaturized design, reducing the lens mass and the space occupation ratio of the lens in the opto-mechanical structure.

[0088] Optionally, in an embodiment provided by the present application, the maximum thickness B1 of the first lens barrel P01 and the maximum thickness B2 of the object side end face of the second lens barrel P02 satisfy: 1.00 mm < B1 + B2 ≤ 1.45 mm. By controlling the total thickness of the object side end face of the first lens barrel P01 and the second lens barrel P02, on the one hand, it provides a certain safety buffer space for the two lens groups (the first lens group is the first lens E1, and the second lens group is the second lens E2 to the sixth lens E6) during the zooming process (especially when the group gap is the smallest), preventing the second lens group from colliding between groups under the action of vibration, impact force, etc., that is, B1 + B2 ≤ 1.45; secondly, this thickness dimension is the bearing dimension during the lens assembly process, and B1 + B2 must satisfy > 1 to ensure the stability of the assembly of each lens during the assembly process, preventing component deformation after assembly caused by too small lens barrel thickness and affecting the imaging quality and reliability performance of the lens.

[0089] Optionally, in an embodiment provided by the present application, the axial distance EP02 from the object side end face of the second lens barrel P02 to the object side surface of the second bearing element P2, the axial distance EP23 between the second bearing element P2 and the third bearing element P3, the central thickness CT2 of the second lens E2, and the central thickness CT3 of the third lens E3 satisfy: 0.90 < (EP02 + EP23) / (CT2 + CT3) < 1.20. Through the constraint of this conditional formula, it can ensure that the thickness ratio and surface profile of the centers of the two lenses, the second lens E2 and the third lens E3, respectively, meet the existing processing design requirements of the lens, control the overall surface curvature of the lens within the range of the forming process requirements, improve the processing stability, and ensure the imaging quality of the lens.

[0090] Optionally, in an embodiment provided by the present application, the spacing distance EP23 between the second supporting element P2 and the third supporting element P3 along the optical axis direction, the central thickness CT3 of the third lens E3, the on-axis air gap T23 between the second lens E2 and the third lens E3, and the maximum thickness CP2 of the second supporting element P2 satisfy: 3.95 < EP23 / CT3 + T23 / CP2 ≤ 11.20. By constraining the non-transmissive body thickness (equivalent to EP23) and the central thickness of the third lens E3, the lens thickness ratio is controlled within a certain range, reducing the risk of lens forming and processing, thereby avoiding stray light and performance problems caused by poor lens processing; at the same time, the thickness of the second supporting element P2 can be adjusted through this conditional formula to change the air gap between the second lens E2 and the third lens E3, realizing lens field curvature adjustment, compensating for the deviation value between actual production and design, so as to obtain a higher on-axis MTF value and improve optical performance.

[0091] Optionally, in an embodiment provided by the present application, the object-side inner diameter d2s of the second supporting element P2, the object-side outer diameter D4s of the fourth supporting element P4, and the image-side inner diameter d2m of the second supporting element P2 satisfy: 2.85 < d2s / (D4s - d2m) < 3.50. Both the second supporting element P2 and the fourth supporting element P4 can use materials with light-shielding properties. Through this conditional constraint, not only can the designed illuminance of the optical system be satisfied, but the inner diameter design of the supporting element limits the incident range of light in this system, effectively blocking the stray light path generated by reflection of each lens, and eliminating the light with poor edge quality, reducing aberration, and thus obtaining a better shooting effect.

[0092] Optionally, in an embodiment provided by the present application, the image-side outer diameter D5m of the fifth supporting element P5, the object-side inner diameter d5s of the fifth supporting element P5, the image-side outer diameter D4m of the fourth supporting element P4, and the object-side inner diameter d4s of the fourth supporting element P4 satisfy: 0.70 < (D5m - d5s) / (D4m - d4s) < 1.65. Both the fourth supporting element P4 and the fifth supporting element P5 can use materials with light-shielding properties. By setting the ratio of the inner diameters of the above-mentioned supporting elements, the internal reflection stray light path generated by the fifth lens E5 can be effectively blocked, controlling the incident trend of effective light, and enabling the lens to obtain better imaging quality. At the same time, the reasonable setting of the supporting elements adjacent to the lens to support the non-transmissive body at the edge of the lens can also absorb part of the energy when the lens is impacted or vibrated, playing a certain protective role.

[0093] Optionally, in an embodiment provided by the present application, the maximum height Lb of the second lens barrel P02 along the second central axis, the distance EP34 between the third supporting element P3 and the fourth supporting element P4 along the optical axis direction, and the distance EP45 between the fourth supporting element P4 and the fifth supporting element P5 along the optical axis direction satisfy: 2.05 < Lb / (EP34 + EP45) < 3.30. By restricting the ratio of the supporting elements between the lenses to the total height of the lens barrel, the fourth lens E4 and the fifth lens E5 are evenly distributed along the second central axis. The periscope lens designed according to this conditional formula can reduce the height step difference during the assembly process, improve the assembly stability, and contribute to improving the product yield.

[0094] Optionally, in an embodiment provided by the present application, the combined focal length f45 of the fourth lens E4 and the fifth lens E5, the image-side inner diameter d5m of the fifth supporting element P5, and the image-side inner diameter d3m of the third supporting element P3 satisfy: 35.2 ≤ f45 / |d5m - d3m| ≤ 46.15. By restricting the ratio of the difference in the image-side inner diameters of the third supporting element P3 and the fifth supporting element P5 to the combined focal length of the fourth lens E4 and the fifth lens E5, not only can the surface curvatures of adjacent lenses be effectively controlled to make the lens surface profile smooth, but also the optical effective aperture is within a reasonable range, which is more conducive to the forming process of the lens. At the same time, the setting of the inner diameter of the supporting element can effectively control the light path between the fourth lens E4 and the fifth lens E5 and intercept non-imaging light, weakening the formation of stray light.

[0095] Optionally, in an embodiment provided by the present application, the object-side inner diameter d4s of the fourth supporting element P4, the object-side inner diameter d5s of the fifth supporting element P5, the refractive index N4 of the fourth lens E4, and the refractive index N5 of the fifth lens E5 satisfy: 3.10 mm < (d4s + d5s) / (N4 + N5) < 3.80 mm. By restricting the refractive indices of the fourth lens E4 and the fifth lens E5 and the inner diameters of the fourth and fifth supporting elements P5, under the conditions of meeting the lens focal length, surface curvature, forming thickness ratio, etc., the stray light path of the system can be effectively intercepted through the design of the inner diameter of the supporting element, especially for the internal light path of the flange structure of the fourth lens E4 and the fifth lens E5, which significantly improves the situation and reduces the stray light risk.

[0096] Optionally, in an embodiment provided by the present application, the distance EP34 between the third supporting element P3 and the fourth supporting element P4 along the optical axis direction and the central thickness CT4 of the fourth lens E4 satisfy: 0.95 < EP34 / CT4 ≤ 1.20. By restricting the ratio of EP34 to CT4, the overall shape and thickness distribution of the fourth lens E4 can be ensured to be uniform, avoiding irregular refraction of light when passing through the lens, which is beneficial to reducing imaging distortion and making light of different wavelengths focus on the same plane, thereby reducing the design chromatic aberration.

[0097] Optionally, in one embodiment provided in this application, the on-axis air gap T23 between the second lens E2 and the third lens E3, the on-axis air gap T34 between the third lens E3 and the fourth lens E4, the sum of the maximum thicknesses of all supporting elements between the second lens E2 and the third lens E3 (∑CP2), and the sum of the maximum thicknesses of all supporting elements between the third lens E3 and the fourth lens E4 (∑CP3) satisfy the following condition: 3.05 < (T23 + T34) / (∑CP2 + ∑CP3) ≤ 16.75. This conditional constraint ensures that the lenses within the second lens barrel P02 are uniformly distributed along the optical axis, guaranteeing the stability of the lenses in the second lens barrel P02 during assembly. On the one hand, it prevents collisions caused by assembly impact due to excessively small gaps between lenses; on the other hand, it avoids problems caused by accelerated airflow inside the lens due to excessively large gaps between lenses, which could lead to easier expansion or contraction of the lens when external temperatures change. This improves the reliability of the periscope lens and increases the stability of the lens imaging.

[0098] This application also provides a periscope lens, including two lens barrels, two lens groups, a reflecting mirror Rm, and several supporting elements:

[0099] The first lens tube P01 has a first central axis;

[0100] The second lens tube P02 has a second central axis that intersects with the first central axis;

[0101] The first lens group includes a first lens E1 mounted on the first lens barrel P01, and the first lens E1 has positive optical power;

[0102] The second lens group includes a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially and coaxially along the object-side end face to the image-side end face of the second lens barrel P02. One of the second lens E2 and the third lens E3 has positive optical power and the other has negative optical power. The absolute value of the effective focal length of the third lens E3 is less than or equal to the absolute value of the effective focal length of any one of the second lens E2, the fourth lens E4, the fifth lens E5, and the sixth lens E6. The fourth lens E4 and / or the fifth lens E5 have positive optical power, and the sixth lens E6 has negative optical power.

[0103] A reflecting mirror Rm, located between the first lens E1 and the second lens E2, is used to reflect light rays exiting through the image-side end face of the first lens barrel P01 toward the second lens E2; and

[0104] The support element group includes a second support element P2 placed on the image side of the second lens E2 and abutting against the image side surface of the second lens E2, a third support element P3 placed on the image side of the third lens E3 and abutting against the image side surface of the third lens E3, a fourth support element P4 placed on the image side of the fourth lens E4 and abutting against the image side surface of the fourth lens E4, and a fifth support element P5 placed on the image side of the fifth lens E5 and abutting against the image side surface of the fifth lens E5.

[0105] The effective focal length f3 of the third lens E3, the center thickness CT3 of the third lens E3, the distance EP34 between the third and fourth supporting elements P3 and P4 along the optical axis, the distance EP45 between the fourth and fifth supporting elements P4 and P5 along the optical axis, the object-side outer diameter D4s of the fourth supporting element P4, and the image-side outer diameter D3m of the third supporting element P3 satisfy the following:

[0106] 4.2 <f3 / (CT3-EP34)<7.3;

[0107] 1.95 < (EP34 + EP45) / EP34 < 3.00; and

[0108] 1.00 <D4s / D3m<1.30。

[0109] This configuration, through the constraints on the optical parameters of the third lens E3 and the distance between adjacent supporting elements in the aforementioned conditional formula, ensures that the overall shape of the lens is uniformly distributed along the perpendicular optical axis, and the lens thickness is rationally designed along the optical axis. This effectively reduces the curvature of the lens surface, lowers the risk of individual component molding failure, makes the actual lens processing surface more stable, obtains a smaller surface PV value, and has better surface eccentricity performance, reducing sensitivity during lens assembly and improving lens MTF performance. Simultaneously, the third lens E3 is located in the middle of the second lens barrel P02. Through the constraint on the ratio of the outer diameters of adjacent supporting elements in the conditional formula, it ensures that the assembly step difference of each lens is within a reasonable range of the assembly process, improving the mechanical strength and assembly stability of the lens. This avoids problems such as assembly deformation or even lens / barrel breakage due to excessive assembly step difference causing excessive stress on a certain lens in the second lens barrel P02 during assembly.

[0110] The following describes some specific, non-limiting examples of embodiments of this application in more detail with reference to the accompanying drawings. It is understood that any of the examples one through three described below is applicable to all embodiments of this application. In the three embodiments provided in this application, each embodiment includes three operating conditions. In all three conditions, the parameters of the lenses used for imaging (surface shape, radius of curvature, center thickness, material, conic coefficient, etc.) are the same, and the distance between the lenses is the same. The difference lies in the parameters (thickness, object-side inner diameter, image-side inner diameter, etc.) of the structures used for auxiliary imaging (lens barrel, spacer element).

[0111] For ease of description, in the following examples, OBJ represents the reflecting surface of the object, STO represents the surface of the aperture stop, f represents the effective focal length of the periscope lens, fa represents the effective focal length of the lens at infinity, fb represents the effective focal length of the lens at a 150mm object distance; fi represents the effective focal length of the i-th lens, i = 1, 2, 3, 4, 5, 6, Semi-FOVa represents half of the maximum field of view at infinity, and Semi-FOVa represents half of the maximum field of view at a 150mm object distance.

[0112] In addition, please refer to again Figure 3 Along the optical path from the object side to the image side, the functional surfaces along the ray path are sequentially designated as S1 to SN, where S1 represents the first functional surface along the direction of the optical path, and SN represents the Nth functional surface along the opposite direction of the optical path. Specifically, S1 and S2 represent the object-side and image-side surfaces of the first lens E1, respectively; S3 represents the reflecting surface of the mirror Rm; S4 and S5 represent the object-side and image-side surfaces of the second lens E2, respectively; S6 and S7 represent the object-side and image-side surfaces of the third lens E3, respectively; S8 and S9 represent the object-side and image-side surfaces of the fourth lens E4, respectively; S10 and S11 represent the object-side and image-side surfaces of the fifth lens E5, respectively; and S12 and S13 represent the object-side and image-side surfaces of the sixth lens E6, respectively.

[0113] The light path is explained as follows: the light emitted by the object passes through S1 and S2, is reflected by S3, and is emitted towards the second lens group. It then passes through S4 to S13 in sequence and arrives at the photosensitive chip behind the lens.

[0114] The quadric surfaces and aspherical surfaces involved in this patent still satisfy the following formula:

[0115]

[0116] In the above formula, x represents the distance vector from the aspherical surface at a height of h to the vertex of the aspherical surface along the optical axis, c represents the curvature, h represents the radial distance from the optical axis, k represents the conic coefficient, and Ai represents the i-th order constant.

[0117] In subsequent embodiments, the surface shape of a lens typically refers to the concavity or convexity of its paraxial region, which is the area near the optical axis. If the lens surface is convex and the location of that convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly known in the art, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface; for the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0118] In the accompanying drawings of the following embodiments, Y and X represent the extension directions of the first and second central axes of the periscope lens, respectively.

[0119] Specifically Figure 5A Taking the optical module in condition 1-1 of Embodiment 1 as an example, the surface data of each optical element in the optical module of Embodiment 1 represented in Table 1 are as follows: The radius of curvature of the object-side surface S4 of the second lens E2 is 4.4637, and the radius of curvature of the image-side surface S5 is -30.4133, which means that the object-side surface and the image-side surface of the second lens E2 are both convex. The radius of curvature of the object-side surface S6 of the third lens E3 is -316.0349, and the radius of curvature R of the image-side surface S7 is 3.4131, which means that the object-side surface and the image-side surface of the third lens E3 are both concave.

[0120] Example 1

[0121] like Figures 5A-7B As shown, this embodiment involves three working conditions: 1-1, 1-2, and 1-3. This application also shows structural schematic diagrams of the periscope lens under each working condition when the object distance is infinite and when the object distance is 150mm. In working conditions 1-1, 1-2, and 1-3, the parameters of the lens used for imaging (surface shape, radius of curvature, thickness, material, and conic coefficient) are the same, while the parameters of the lens barrel and multiple spacer elements used for auxiliary imaging (maximum thickness, inner diameter, and lens edge thickness) are at least partially different, as detailed in Table 8.

[0122] In this embodiment, the optical power and surface shape of the lenses are as follows: the positive and negative attributes of the optical power of the first lens E1 to the sixth lens E6 are positive, positive, negative, positive, positive, negative, respectively. The object side of the first lens E1 is convex and the image side is concave. The object side of the second lens E2 is convex and the image side is convex. The object side of the third lens E3 is concave and the image side is concave. The object side of the fourth lens E4 is convex and the image side is concave. The object side of the fifth lens E5 is concave and the image side is convex. The object side of the sixth lens E6 is convex and the image side is concave.

[0123] Figure 5A , 5B For the structure corresponding to working condition 1-1, the contact methods between each supporting element in the supporting element group and each lens in the second lens group are as follows: The object side and image side of the second supporting element P2 abut against the image side S5 of the second lens and the object side S6 of the third lens, respectively. The object side and image side of the third supporting element P3 abut against the image side S7 of the third lens and the object side S8 of the fourth lens, respectively. The object side and image side of the fourth supporting element P4 abut against the image side S9 of the fourth lens and the object side S10 of the fifth lens, respectively. The object side and image side of the fifth supporting element P5 abut against the image side S11 of the fifth lens and the object side S12 of the sixth lens, respectively. Figure 6A , 6B The corresponding working conditions 1-2 and Figure 7A , 7B The contact method of the supporting components in the corresponding working conditions 1-3 is the same as that in working condition 1-1, and will not be repeated here.

[0124] Table 1 provides the design data for the periscope lens in Example 1, and Table 2 provides the higher-order coefficient parameters of the aspherical surface in Table 1.

[0125] Table 1

[0126] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity Infinity | 150 S1 Asphere 14.4853 0.8000 1.814,41.0 -0.0487 S2 Asphere 18.1380 0.0000 -0.0064 Sphere Infinity 4.0000 S3 (reflection) Sphere Infinity 0.0000 Sphere Infinity 6.5477 Sphere Infinity 0|-1.2419 Sphere Infinity 1.0377 STO Sphere Infinity -1.0377 S4 Asphere 4.4637 2.3697 1.537,55.61 0.0044 S5 Asphere -30.4133 0.0400 0.4052 S6 Asphere -316.0349 0.9960 1.645,23.53 99.0000 S7 Asphere 3.5255 0.5629 -0.0006 S8 Asphere 3.4131 1.2952 1.619,25.93 -0.0003 S9 Asphere 5.7510 0.3356 0.0451 S10 Asphere -13.9833 1.8621 1.678,19.25 -0.0762 S11 Asphere -8.6517 0.2925 -0.0717 S12 Asphere 3.8992 0.8492 1.537,55.61 -0.0121 S13 Asphere 2.9115 3.6068 -1.0138 Sphere Infinity 0|1.2419 S14 Sphere Infinity 0.2100 1.518,64.2 S15 Sphere Infinity 0.3800 S16 Sphere Infinity

[0127] Table 2

[0128]

[0129]

[0130] Figure 8A This is an astigmatism curve of the periscope lens in Example 1 at an infinite object distance. Figure 8B This is a distortion curve of the periscope lens in Example 1 at an infinite object distance. According to... Figures 8A-8B It can be seen that the periscope lens in Example 1 can achieve good imaging quality.

[0131] Example 2

[0132] likeFigures 9A-11B As shown, this embodiment involves three working conditions: 1-1, 1-2, and 1-3. This application also shows structural schematic diagrams of the periscope lens under each working condition when the object distance is infinite and when the object distance is 150mm. In working conditions 2-1, 2-2, and 2-3, the parameters (surface shape, radius of curvature, thickness, material, and conic coefficient) of the lens used for imaging are the same, while the parameters of the lens barrel and multiple spacer elements used for auxiliary imaging are at least partially different, as detailed in Table 8.

[0133] In this embodiment, the optical power and surface shape of the lenses are as follows: the positive and negative attributes of the optical power of the first lens E1 to the sixth lens E6 are positive, positive, negative, positive, negative, negative, respectively. The object side of the first lens E1 is convex and the image side is concave. The object side of the second lens E2 is convex and the image side is convex. The object side of the third lens E3 is concave and the image side is concave. The object side of the fourth lens E4 is convex and the image side is convex. The object side of the fifth lens E5 is concave and the image side is convex. The object side of the sixth lens E6 is convex and the image side is concave.

[0134] Figure 9A , 9B For the structure corresponding to working condition 2-1, the contact methods between each supporting element in the supporting element group and each lens in the second lens group are as follows: The object side and image side of the second supporting element P2 abut against the image side S5 of the second lens and the object side S6 of the third lens, respectively. The object side and image side of the third supporting element P3 abut against the image side S7 of the third lens and the object side S8 of the fourth lens, respectively. The object side and image side of the fourth supporting element P4 abut against the image side S9 of the fourth lens and the object side S10 of the fifth lens, respectively. The object side and image side of the fifth supporting element P5 abut against the image side S11 of the fifth lens and the object side S12 of the sixth lens, respectively. Figure 10A , 10B The corresponding working condition 2-2 and Figure 11A , 11B The contact method of the supporting element in the corresponding working condition 2-3 is the same as that in working condition 2-1, and will not be described again here.

[0135] Table 3 provides the design data for the periscope lens in Example 2, and Table 4 provides the higher-order coefficient parameters of the aspherical surface in Table 1.

[0136] Table 3

[0137]

[0138]

[0139] Table 4

[0140] Face number A4 A6 A8 A10 A12 A14 A16 S4 3.75E-04 4.04E-04 -2.31E-04 8.43E-05 -1.93E-05 2.91E-06 -2.77E-07 S5 3.46E-02 -3.56E-02 1.97E-02 -6.60E-03 1.41E-03 -1.94E-04 1.67E-05 S6 3.84E-02 -3.95E-02 2.30E-02 -8.26E-03 1.91E-03 -2.87E-04 2.71E-05 S7 2.76E-02 -1.54E-02 9.04E-03 -3.79E-03 1.14E-03 -2.34E-04 3.07E-05 S8 1.91E-02 -2.57E-03 2.09E-03 -1.47E-03 6.46E-04 -1.64E-04 2.39E-05 S9 -2.04E-02 2.09E-02 -8.94E-03 1.87E-03 -4.95E-05 -5.66E-05 1.09E-05 S10 -5.28E-02 3.20E-02 -1.46E-02 4.31E-03 -8.28E-04 1.10E-04 -1.14E-05 S11 -3.16E-02 3.29E-02 -2.34E-02 1.07E-02 -3.23E-03 6.34E-04 -7.79E-05 S12 1.20E-02 3.82E-02 -3.28E-02 1.64E-02 -5.23E-03 1.07E-03 -1.34E-04 S13 3.69E-02 -6.40E-04 -1.59E-03 5.97E-04 -1.12E-04 1.21E-05 -7.41E-07 Face number A18 A20 S4 1.51E-08 -3.51E-10 S5 -8.18E-07 1.75E-08 S6 -1.46E-06 3.42E-08 S7 -2.29E-06 7.33E-08 S8 -1.87E-06 6.04E-08 S9 -7.77E-07 1.82E-08 S10 8.73E-07 -3.37E-08 S11 5.41E-06 -1.62E-07 S12 9.38E-06 -2.81E-07 S13 2.21E-08 -1.84E-10

[0141] Figure 12A This is an astigmatism curve of the periscope lens in Example 2 at an infinite object distance. Figure 12B This is a distortion curve of the periscope lens in Example 2 at an infinite object distance. According to... Figures 12A-12B It can be seen that the periscope lens in Embodiment 2 can achieve good imaging quality.

[0142] Example 3

[0143] like Figures 13A-15B As shown, this embodiment involves three working conditions: 1-1, 1-2, and 1-3. This application also shows structural schematic diagrams of the periscope lens under each working condition when the object distance is infinite and when the object distance is 150mm. In working conditions 3-1, 3-2, and 3-3, the parameters (surface shape, radius of curvature, thickness, material, and conic coefficient) of the lens used for imaging are the same, while the parameters of the lens barrel and multiple spacer elements used for auxiliary imaging are at least partially different, as detailed in Table 8.

[0144] In this embodiment, the optical power and surface shape of the lenses are as follows: the positive and negative attributes of the optical power of the first lens E1 to the sixth lens E6 are positive, negative, positive, negative, positive, negative, respectively. The object side of the first lens E1 is convex and the image side is concave. The object side of the second lens E2 is convex and the image side is concave. The object side of the third lens E3 is convex and the image side is concave. The object side of the fourth lens E4 is concave and the image side is convex. The object side of the fifth lens E5 is convex and the image side is concave. The object side of the sixth lens E6 is concave and the image side is convex.

[0145] Figure 13A , 13B For the structure corresponding to working condition 3-1, the supporting element group also includes a third auxiliary supporting element P3b and a third auxiliary supporting element P3c placed between the third supporting element P3 and the object side of the fourth lens E4, and a fourth auxiliary supporting element P4b and a fourth auxiliary supporting element P4c placed between the fourth supporting element P4 and the object side of the fifth lens E5. The contact method between each supporting element and each lens in the second lens group is as follows:

[0146] The object-side and image-side surfaces of the second supporting element P2 abut against the image-side surface S5 of the second lens and the object-side surface S6 of the third lens, respectively. The object-side surface of the third supporting element P3 abuts against the image-side surface S7 of the third lens, the object-side surface of the third auxiliary supporting element P3b abuts against the image-side surface of the third supporting element P3, and the object-side and image-side surfaces of the third auxiliary supporting element P3c abut against the image-side surface of the third auxiliary supporting element P3b and the object-side surface S8 of the fourth lens, respectively. The object-side surface of the fourth supporting element P4 abuts against the image-side surface S9 of the fourth lens, the object-side surface of the fourth auxiliary supporting element P4b abuts against the image-side surface of the fourth supporting element P4, and the object-side and image-side surfaces of the fourth auxiliary supporting element P4c abut against the fourth auxiliary supporting element P4b and the object-side surface S10 of the fifth lens, respectively. The object-side and image-side surfaces of the fifth supporting element P5 abut against the image-side surface S11 of the fifth lens and the object-side surface S12 of the sixth lens, respectively. Figure 14A , 14B The corresponding working condition 3-2 and Figure 15A , 15B The contact method of the supporting element in the corresponding working condition 3-3 is the same as that in working condition 3-1, and will not be described again here.

[0147] Table 5 shows the design data for the periscope lens in Example 3, and Table 6 shows the higher-order coefficient parameters of the aspherical surface in Table 1.

[0148] Table 5

[0149] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity Infinity | 150 S1 Asphere 6.7513 0.7045 1.489,70.42 0.0000 S2 Asphere 7.8655 0.0000 -1.8415 Sphere Infinity 4.0000 S3 (reflection) Sphere Infinity 0.0000 Sphere Infinity 4.6487 Sphere Infinity 1.3589|0.1288 STO Sphere Infinity -0.5368 S4 Asphere 4.8903 0.5994 1.679,19.24 0.0000 S5 Asphere 3.5187 0.1961 0.0000 S6 Asphere 3.9617 1.7000 1.546,56.14 0.0000 S7 Asphere 22.3008 0.9257 0.0000 S8 Asphere -4.5467 1.3509 1.679,19.4 0.0000 S9 Asphere -5.8090 0.0400 0.0000 S10 Asphere 2.7003 0.9319 1.537,55.61 -1.0000 S11 Asphere 3.6188 2.2821 0.0000 S12 Asphere -2.1333 0.4108 1.537,55.61 -1.0000 S13 Asphere -3.0618 0.2589|1.489 -1.0000 S14 Sphere Infinity 0.2100 1.518,64.2 S15 Sphere Infinity 3.8742 S16 Sphere Infinity

[0150] Table 6

[0151]

[0152]

[0153] Figure 16A This is an astigmatism curve of the periscope lens in Example 3 at an infinite object distance. Figure 16B This is a distortion curve of the periscope lens in Example 3 at an infinite object distance. According to... Figures 16A-16B It can be seen that the periscope lens in Embodiment 3 can achieve good imaging quality.

[0154] The optical parameters of Examples 1 to 3 are shown in Table 7:

[0155] Table 7

[0156] Optical parameters Example one Example two Example three Semi-FOVa (°) 10.296 16.040 9.344 Semi-FOVb (°) 9.1157 14.853 8.3839 fa (mm) 13.302 13.320 13.276 fb (mm) 13.113 13.129 13.086 f1 (mm) 80.50 80.32 80.68 f2 (mm) 7.43 7.47 -22.45 f3 (mm) -5.40 -5.08 8.54 f4 (mm) 11.19 8.41 -54.33 f5 (mm) 29.35 -1722.24 14.62 f6 (mm) -30.60 -100.91 -15.49

[0157] The structural black matter data corresponding to Examples 1 to 3 are shown in Table 8, unit (mm):

[0158] Table 8

[0159]

[0160]

[0161] The relationships satisfied by the data in Examples 1 to 3 are shown in Table 9:

[0162] Table 9

[0163] Conditional expression \ data 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 R1 / R2 * N1 1.45 1.45 1.45 1.50 1.50 1.50 1.28 1.28 1.28 (D3m-d3s) / (D2m-d2s) 1.44 1.88 1.43 1.49 1.85 1.78 1.08 2.68 1.08 B1+B2 1.10 1.45 1.16 1.02 1.11 1.10 1.02 1.03 1.05 (EP02+EP23) / (CT2+CT3) 1.11 1.14 1.19 1.12 1.10 1.11 0.93 0.93 0.93 d2s / (D4s-d2m) 2.95 2.96 2.88 3.08 3.10 3.06 3.49 3.41 3.38 fa / (X2+Y1) 0.78 0.78 0.78 0.78 0.78 0.78 0.99 0.99 0.99 (D5m-d5s) / (D4m-d4s) 0.97 0.96 0.97 0.94 0.94 0.94 1.60 0.75 0.73 Lb / (EP34+EP45) 2.89 2.91 3.00 3.26 3.18 3.18 2.07 2.07 2.06 EP23 / CT3+T23 / CP2 3.96 4.37 4.15 4.10 4.50 4.50 9.21 11.20 11.20 f45 / |d5m-d3m| 41.43 35.35 36.00 46.15 37.51 37.51 35.35 35.20 35.20 (d4s+d5s) / (N4+N5) 3.21 3.21 3.22 3.15 3.17 3.17 3.77 3.78 3.79 EP34 / CT4 1.17 1.20 1.15 0.98 1.03 1.02 1.18 1.18 1.18 (T23+T34) / (∑CP2+∑CP3) 13.70 16.75 15.07 12.63 15.44 15.44 3.07 3.19 3.28 f3 / (CT3-EP23) 4.73 4.71 4.72 4.22 4.24 4.24 7.10 7.28 7.22 (EP23+EP45) / EP34 2.41 2.35 2.46 2.99 2.85 2.88 1.97 1.98 1.98 D4s / D3m 1.01 1.26 1.01 1.01 1.25 1.26 1.03 1.03 1.03

[0164] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0165] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A periscope lens, characterized in that, Comprising: A first lens barrel having a first central axis; A second lens barrel having a second central axis intersecting the first central axis; A first lens group including a first lens mounted on the first lens barrel, the first lens having a positive optical power, and the object side and image side surfaces of the first lens being convex and concave respectively; A second lens group mounted on the second lens barrel, the second lens group including a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence along the object side end face to the image side end face of the second lens barrel and sharing the same optical axis, the object side surface of the second lens being convex, the image side surface of the third lens being concave, one of the second lens and the third lens having a positive optical power and the other having a negative optical power, the fourth lens and / or the fifth lens having a positive optical power, and the sixth lens having a negative optical power; A reflecting mirror disposed between the first lens and the second lens and inclined with respect to the first central axis and the second central axis for reflecting the light emitted from the image side end face of the first lens barrel to the second lens; And A bearing element group including a second bearing element disposed on the image side of the second lens and abutting against the image side surface of the second lens, and a third bearing element disposed on the image side of the third lens and abutting against the image side surface of the third lens; The following relationships are satisfied among the object side curvature radius R1 of the first lens, the image side curvature radius R2 of the first lens, the refractive index N1 of the first lens, the image side outer diameter D3m of the third bearing element, the object side inner diameter d3s of the third bearing element, the image side outer diameter D2m of the second bearing element, and the object side inner diameter d2s of the second bearing element: 1.25 < R1 / R2 * N1 ≤ 1.5; and 1.05 < (D3m - d3s) / (D2m - d2s) < 2.

70.

2. The periscope lens according to claim 1, characterized in that, The second lens barrel is slidably disposed on the image side of the reflecting mirror along the second central axis, and the object distance range of the periscope lens is from infinity to 150 mm.

3. The periscope lens according to claim 2, characterized in that, The following relationships are satisfied among the effective focal length fa of the periscope lens in the infinity state, the axial distance Y1 from the intersection point of the object side surface of the first lens and the optical axis to the reflecting surface of the reflecting mirror, the axial distance X2 from the object side surface of the second lens to the image side surface of the sixth lens, and the maximum length X of the periscope lens along the second central axis: 0.65 < fa / (X2 + Y1) < 0.73, 19.45 mm < X < 21.40 mm.

4. The periscope lens according to claim 1, characterized in that, The following relationship is satisfied between the maximum thickness B1 of the first lens barrel and the maximum thickness B2 of the object side end face of the second lens barrel: 1.00 mm < B1 + B2 ≤ 1.45 mm.

5. The periscope lens according to claim 1, characterized in that, The following relationship is satisfied among the axial distance EP02 from the object side end face of the second lens barrel to the object side surface of the second bearing element along the optical axis, the axial interval distance EP23 between the second bearing element and the third bearing element, the central thickness CT2 of the second lens, and the central thickness CT3 of the third lens: 0.90 < (EP02 + EP23) / (CT2 + CT3) < 1.

20.

6. The periscope lens according to claim 1, characterized in that, The following parameters are satisfied: the distance EP23 between the second and third supporting elements along the optical axis; the center thickness CT3 of the third lens; the on-axis air gap T23 between the second and third lenses; and the maximum thickness CP2 of the second supporting element. <EP23 / CT3+T23 / CP2≤11.20。 7. The periscope lens according to any one of claims 1 to 6, characterized in that, The supporting element group further includes a fourth supporting element disposed on the image side of the fourth lens and abutting against the image side surface of the fourth lens; The object-side inner diameter d2s of the second supporting element, the object-side outer diameter D4s of the fourth supporting element, and the image-side inner diameter d2m of the second supporting element satisfy the following relationship: 2.85 <d2s / (D4s-d2m)<3.50。 8. The periscope lens according to claim 7, characterized in that, The supporting element group further includes a fifth supporting element disposed on the image side of the fifth lens and abutting against the image side surface of the fifth lens; The image-side outer diameter D5m of the fifth supporting element, the object-side inner diameter d5s of the fifth supporting element, the image-side outer diameter D4m of the fourth supporting element, and the object-side inner diameter d4s of the fourth supporting element satisfy the following condition: 0.70 < (D5m - d5s) / (D4m - d4s) < 1.

65.

9. The periscope lens according to claim 8, characterized in that, The maximum height Lb of the second lens barrel along the second central axis, the distance EP34 between the third and fourth supporting elements along the optical axis, and the distance EP45 between the fourth and fifth supporting elements along the optical axis satisfy the following condition: 2.05 <Lb / (EP34+EP45)<3.30。 10. The periscope lens according to claim 8, characterized in that, The combined focal length f45 of the fourth lens and the fifth lens, the image-side inner diameter d5m of the fifth supporting element, and the image-side inner diameter d3m of the third supporting element satisfy the following condition: 35.2≤f45 / |d5m-d3m|≤46.

15.

11. The periscope lens according to claim 8, characterized in that, The object-side inner diameter d4s of the fourth support element, the object-side inner diameter d5s of the fifth support element, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy the following condition: 3.10mm < (d4s + d5s) / (N4 + N5) < 3.80mm.

12. The periscope lens according to claim 7, characterized in that, The distance EP34 between the third and fourth supporting elements along the optical axis and the center thickness CT4 of the fourth lens satisfy the following condition: 0.

95. <EP34 / CT4≤1.20。 13. The periscope lens according to claim 7, characterized in that, The on-axis air gap T23 between the second lens and the third lens, the on-axis air gap T34 between the third lens and the fourth lens, the sum of the maximum thicknesses of all supporting elements between the second lens and the third lens ∑CP2, and the sum of the maximum thicknesses of all supporting elements between the third lens and the fourth lens ∑CP3 satisfy the following condition: 3.05 < (T23 + T34) / (∑CP2 + ∑CP3) ≤ 16.75.

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