Periscope lens

Abstract

The present application relates to a periscope lens, which includes a lens barrel, a prism, a lens group, and a spacer element group. The lens barrel has an object-side end face and an image-side end face. The prism is placed on the object side of the lens barrel for reflecting light. The lens group includes first to sixth lenses arranged in sequence from the object-side end face to the image-side end face and coaxial. The optical powers of the second to third lenses are positive, negative, and negative in sequence. The spacer element group includes first to fifth spacer elements corresponding to the image sides of the first to fifth lenses in sequence. Based on the structure of the periscope lens barrel, the third to fifth lenses and the third to fifth spacer elements satisfy the relational expressions: 0.33 ≤ (T34 + T45) / L ≤ 0.37; 0.10 ≤ (d4m - d3s) / d3m < 0.85, 0.29 < (d5s - d3m) / d4s < 0, which can meet the requirements of lens miniaturization and reduction of stray light in the image.

Description

Technical Field

[0001] The present invention relates to the technical field of periscope lenses, and particularly to a periscope lens. Background Art

[0002] With the development of the trends of high performance, high quality and ultra-thinness in mobile phones, higher requirements are also put forward for mobile phone camera technology. The proportion of the use of telephoto lenses in mobile phone cameras is also increasing, and the requirements for the zoom ratio and aperture of telephoto lenses are also getting higher. At the same time, to meet the requirement of small size, the use of prisms is becoming more and more extensive. However, while ensuring the amount of light required for imaging under the current size conditions of lenses with prisms, the light is likely to reach the edge area of the lens after reflection, and this part of the light will have abnormal reflection and generate stray light in the edge area of the lens. To solve such stray light problems, a common technical solution is to proportionally enlarge the size of the lens so that the light is away from the edge of the lens. However, this is contrary to the development direction of lens miniaturization, and the cost of the product is also relatively high. Summary of the Invention

[0003] Based on the fact that the existing periscope telephoto lenses are severely restricted by the product size, resulting in serious stray light problems in actual use, it is necessary to provide a periscope lens.

[0004] A periscope lens, comprising:

[0005] A lens barrel having an object-side end face and an image-side end face;

[0006] A lens group mounted on the lens barrel, the lens group including a first lens with a focal power, a second lens with a positive focal power, a third lens with a negative focal power, a fourth lens with a negative focal power, a fifth lens with a focal power, and a sixth lens with a focal power, which are arranged in sequence from the object-side end face to the image-side end face and are coaxially arranged;

[0007] An interval element group mounted on the lens barrel, the interval element group including a first interval element placed on the image side of the first lens and abutting against the image side face of the first lens, a second interval element placed on the image side of the second lens and abutting against the image side face of the second lens, a third interval element placed on the image side of the third lens and abutting against the image side of the third lens, a fourth interval element placed on the image side of the fourth lens and abutting against the image side of the fourth lens, a fifth interval element placed on the image side of the fifth lens and abutting against the image side face of the fifth lens; and

[0008] A prism placed on the object side of the lens barrel and having a reflecting surface, the reflecting surface being inclined with respect to the optical axis of the lens group and the angle between the normal line of the reflecting surface and the optical axis of the lens group being an acute angle;

[0009] The air gap T34 between the third lens and the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the object-side inner diameter d3s of the third spacer element, the image-side inner diameter d3m of the third spacer element, the object-side inner diameter d4s of the fourth spacer element, the image-side inner diameter d4m of the fourth spacer element, and the object-side inner diameter d5s of the fifth spacer element satisfy the following:

[0010] 0.33 ≤ (T34 + T45) / L ≤ 0.37;

[0011] 0.10 ≤ (d4m - d3s) / d3m < 0.85; and

[0012] 0.29 < (d5s - d3m) / d4s < 0.6.

[0013] With such settings, firstly, the integrated structure of the prism replaces the existing lens group for realizing reflection and convergence functions, which is beneficial to promoting the miniaturization of the lens; secondly, by controlling the ratio of the air gap between the third lens, the fourth lens and the fifth lens on the optical axis to the total length of the lens within a reasonable range, the light path inside the lens can be effectively guaranteed, and the light utilization rate can be improved; however, due to the too large air gap between the third, fourth and fifth lenses, the light is more likely to reach the edge of the lens when passing through these three lenses. Especially for the fourth lens in the middle, there is more stray light generated before and after the light is refracted by the fourth lens. By controlling the inner diameters of the third spacer element and the fourth spacer element, on the premise of not blocking the effective light, the internal reflection stray light generated inside the fourth lens and the stray light generated by the refraction on the inner side surface of the spacer element are reduced as much as possible, thereby reducing the adverse effect of the stray light on the picture.

[0014] In one embodiment, the prism further has an incident surface and an exit surface located on both sides of the reflection surface. Both the incident surface and the exit surface are spherical surfaces. The incident surface is a convex surface and the exit surface is a concave surface. The axial distance Y from the intersection of the incident surface and the optical axis to the image side surface of the sixth lens satisfies: 23.90 mm < Y < 24.15 mm.

[0015] In one embodiment, the maximum height L of the lens barrel and the effective focal length f of the periscope lens satisfy: 0.35 < L / f < 0.51.

[0016] In one embodiment, the air gap T34 between the third lens and the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the maximum thickness CP3 of the third spacer element, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.30 < (T34 + T45) / (CP3 + CP4) < 4.75.

[0017] In one embodiment, the sign attributes of the optical power of the first lens and the sixth lens are the same, and the sign attributes of the optical power of the fifth lens and the sixth lens are different;

[0018] For the effective focal length f5 of the fifth lens, the object-side inner diameter d5s of the fifth spacer element, and the object-side inner diameter d4s of the fourth lens, the following is satisfied: 4.5 < |f5 / (d5s - d4s)| < 11.85, preferably 4.5 < |f5 / (d5s - d4s)| < 7.05.

[0019] In one embodiment, for the effective focal length f3 of the third lens, the air gap T34 on the optical axis between the third lens and the fourth lens, and the object-side inner diameter d3s of the third spacer element, the following is satisfied: -2.15 mm -1 < f3 / T34 / d3s < -1.00 mm -1 。

[0020] In one embodiment, for the axial spacing distance EP12 between the first spacer element and the second spacer element, the axial spacing distance EP23 between the second spacer element and the third spacer element, and the central thickness CT2 of the second lens, the following is satisfied: 1.40 < (EP12 + EP23) / CT2 < 2.05.

[0021] In one embodiment, for the sum ∑CP1 of the maximum thicknesses of all spacer elements between the first lens and the second lens, the air gap T12 on the optical axis between the first lens and the second lens, the maximum thickness CP2 of the second spacer element, and the air gap T23 on the optical axis between the second lens and the third lens, the following is satisfied: 5.55 < ∑CP1 / T12 + CP2 / T23 < 12.15, preferably 5.55 < ∑CP1 / T12 + CP2 / T23 < 7.00.

[0022] In one embodiment, for the maximum thickness CP2 of the second spacer element, the axial spacing distance EP23 between the second spacer element and the third spacer element, and the central thickness CT3 of the third lens, the following is satisfied: 1.85 < (CP2 + EP23) / CT3 < 2.75.

[0023] In one embodiment, for the object-side inner diameter d0s of the lens barrel and the object-side inner diameter d1s of the first spacer element, the following is satisfied: 1.00 < d0s / d1s < 1.41.

[0024] In one embodiment, for the image-side inner diameter d0m of the lens barrel and the image-side outer diameter D5m of the fifth spacer element, the following is satisfied: 1.05 ≤ d0m / D5m ≤ 1.10.

[0025] In one embodiment, the maximum thickness CP4 of the fourth spacer element, the spacing distance EP45 between the fourth spacer element and the fifth spacer element along the optical axis direction, and the effective focal length f5 of the fifth lens satisfy: -0.22 ≤ (CP4 + EP45) / f5 ≤ 0.20 and (CP4 + EP45) ≠ 0.

[0026] In one embodiment, the minimum aperture d0smin of the lens barrel on the object side and the inner diameter d3s of the third spacer element on the object side satisfy: 0.85 < d0smin / d3s < 1.30. Description of the Drawings

[0027] Figure 1 Schematic structural diagram of a periscope lens in an embodiment provided by the present application;

[0028] Figure 2 is Figure 1 Schematic diagram of the dimension markings of the middle lens barrel, lens group and spacer element group;

[0029] Figure 3A Schematic structural diagram of the periscope lens in Condition 1-1;

[0030] Figure 3B Schematic structural diagram of the periscope lens in Condition 1-2;

[0031] Figure 3C Schematic structural diagram of the periscope lens in Condition 1-3;

[0032] Figure 4A Distortion curve graph of the periscope lens in Embodiment 1;

[0033] Figure 4B Magnification chromatic aberration curve graph of the periscope lens in Embodiment 1;

[0034] Figure 5A Schematic structural diagram of the periscope lens in Condition 2-1;

[0035] Figure 5B Schematic structural diagram of the periscope lens in Condition 2-2;

[0036] Figure 5C Schematic structural diagram of the periscope lens in Condition 2-3;

[0037] Figure 6A Distortion curve graph of the periscope lens in Embodiment 2;

[0038] Figure 6B Magnification chromatic aberration curve graph of the periscope lens in Embodiment 2;

[0039] Figure 7A It is a schematic structural diagram of a periscope lens in operating condition 3-1;

[0040] Figure 7B It is a schematic structural diagram of a periscope lens in operating condition 3-2;

[0041] Figure 7C It is a schematic structural diagram of a periscope lens in operating condition 3-3;

[0042] Figure 8A It is a distortion curve graph of the periscope lens in Embodiment 3;

[0043] Figure 8B It is a longitudinal chromatic aberration curve graph of the periscope lens in Embodiment 3;

[0044] Figure 9A It is a test spot diagram of a periscope lens when (T34 + T45) / L = 0.34, (d4m - d3s) / d3m = 0.08, and (d5s - d3m) / d4s = 0.2;

[0045] Figure 9B It is a test spot diagram of a periscope lens when (T34 + T45) / L = 0.34, (d4m - d3s) / d3m = 0.1, and (d5s - d3m) / d4s = 0.3;

[0046] Figure 9C It is a test spot diagram of a periscope lens when (T34 + T45) / L = 0.34, (d4m - d3s) / d3m = 0.87, and (d5s - d3m) / d4s = 0.62.

[0047] Reference numerals:

[0048] E1, the first lens; E2, the second lens; E3, the third lens; E4, the fourth lens; E5, the fifth lens; E6, the sixth lens; P0, the lens barrel; P1, the first spacer element; P1b, the first auxiliary spacer element; P2, the second spacer element; P3, the third spacer element; P4, the fourth spacer element; P5, the fifth spacer element; P5b, the fifth auxiliary spacer element. Detailed implementation manners

[0049] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0052] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0054] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate 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 intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0055] With the development of the trend of high performance, high quality and ultra-thin of mobile phones, higher requirements are also put forward for mobile phone camera technology. The proportion of the use of telephoto lenses in mobile phone cameras is also increasing, and the requirements for the zoom ratio and aperture of telephoto lenses are also getting higher and higher. At the same time, to meet the requirement of small size, the use of prisms is becoming more and more extensive. However, under the current size conditions of the lens with a prism, while ensuring the amount of light required for imaging, the light is easily reflected to reach the edge area of the lens after reflection, and this part of the light will undergo abnormal reflection and generate stray light in the edge area of the lens. To solve the problem of stray light such as internal stray light in the lens, a common technical solution is to expand the size of the lens in proportion to keep the light away from the edge of the lens, but this is contrary to the development direction of lens miniaturization, and the cost of the product is also relatively high.

[0056] Based on this, it is necessary to provide a periscope lens that can reduce stray light while ensuring imaging quality.

[0057] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the periscope lens in an embodiment provided by this application. Figure 2 For Figure 1Schematic diagram of the size markings of the middle barrel P0, the lens group, and the spacer element group. A periscope lens provided in the present application includes a barrel P0, a prism P, a lens group mounted on the barrel P0, and a spacer element group mounted on the barrel P0. The barrel P0 has an object-side end face and an image-side end face, and its inner wall is stepped. The prism P is placed on the object side of the barrel P0 and has a reflecting surface. The reflecting surface is arranged obliquely to the optical axis of the lens group, and the included angle between the normal of the reflecting surface and the optical axis of the lens group is an acute angle, so as to realize the transfer of the optical path. In addition, the prism P can replace the existing lens group for realizing reflection and convergence functions, which is beneficial to promoting the miniaturization of the lens. The lens group includes a first lens E1 with a focal power, a second lens E2 with a positive focal power, a third lens E3 with a negative focal power, a fourth lens E4 with a negative focal power, a fifth lens E5 with a focal power, and a sixth lens E6 with a focal power, which are arranged in sequence from the object-side end face to the image-side end face and are coaxial. The spacer element group includes a first spacer element P1 placed on the image side of the first lens E1 and abutting against the image-side surface of the first lens E1, a second spacer 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 spacer element P3 placed on the image side of the third lens E3 and abutting against the image-side of the third lens E3, a fourth spacer element P4 placed on the image side of the fourth lens E4 and abutting against the image-side of the fourth lens E4, and a fifth spacer element P5 placed on the image side of the fifth lens E5 and abutting against the image-side surface of the fifth lens E5. Based on the structure of the periscope lens, the air gap T34 between the third lens E3 and the fourth lens E4 on the optical axis, the air gap T45 between the fourth lens E4 and the fifth lens E5 on the optical axis, the object-side inner diameter d3s of the third spacer element P3, the image-side inner diameter d3m of the third spacer element P3, the object-side inner diameter d4s of the fourth spacer element P4, the image-side inner diameter d4m of the fourth spacer element P4, and the object-side inner diameter d5s of the fifth spacer element P5 satisfy:

[0058] 0.33 ≤ (T34 + T45) / L ≤ 0.37;

[0059] 0.10 ≤ (d4m - d3s) / d3m < 0.85; and

[0060] 0.29 < (d5s - d3m) / d4s < 0.6.

[0061] Based on the constraints of the above three conditional expressions, by controlling the ratio of the air gap between the third lens E3, the fourth lens E4 and the fifth lens E5 on the optical axis to the total length of the lens within a reasonable range, the trend of the light in the lens can be effectively guaranteed and the utilization rate of the light can be improved; however, if the air gap between the third lens E3, the fourth lens E4 and the fifth lens is too large, the light is more likely to reach the edge of the lens after passing through these three lenses, especially for the fourth lens E4 located in the middle, the light will generate more stray light before and after being refracted by the fourth lens E4. By controlling the shapes of the third spacing element P3, the fourth spacing element P4 and the fifth spacing element P5 by conditional expressions 2 and 3, the internal reflected stray light generated in the fourth lens E4 and the stray light refracted on the inner side surface of the spacing element can be reduced as much as possible without blocking the effective light, thereby reducing the adverse effect of the stray light on the picture.

[0062] Specifically, Figures 9A - 9C As shown, Figure 9A This is a schematic diagram of the light spot of the lens test when the conditions (T34+T45) / L=0.34, (d4m-d3s) / d3m=0.08, (d5s-d3m) / d4s=0.2 are met. Figure 9B This is a schematic diagram of the light spot of the lens test when the conditions (T34+T45) / L=0.34, (d4m-d3s) / d3m=0.1, (d5s-d3m) / d4s=0.3 are met. Figure 9C This is a schematic diagram of the light spot of the lens test when the conditional formula (T34+T45) / L=0.34, (d4m-d3s) / d3m=0.87, (d5s-d3m) / d4s=0.62 is met. By comparing the three light spot diagrams, we can see that Figure 9A The spot area is larger and more diffuse. Figure 9C The light spot energy is larger and more concentrated. Figure 9B The test results of the representative lens are good, that is to say, controlling the values ​​of (T34+T45) / L, (d4m-d3s) / d3m and (d5s-d3m) / d4s within the conditional range provided in this application can significantly reduce the amount of stray light, thereby obtaining a better imaging effect. Figure 9AThe reason for the internal stray light is as follows: when the inner aperture of the third spacer element P3 is relatively large, and the inner diameters of the fourth spacer element P4 and the fifth spacer element P5 remain unchanged, the marginal rays refracted by the third lens E3 will be reflected when hitting the object side surface of the fourth lens E4 and return to the marginal structure area of the third lens E3. After multiple reflections on the inner surface of the marginal area of the third lens E3, they will exit from the image side of the third lens E3 and reach the photosensitive chip behind the lens together with the effective rays, thus generating internal reflection stray light. In other words, in this case, the stray light is formed within the marginal structure area of the third lens E3, and the third spacer element P3 cannot effectively block the formation and continuous transmission of this internal reflection stray light. The fourth spacer element P4 and the fifth spacer element P5 also cannot effectively block the continuous transmission of this internal reflection stray light, resulting in interference of this internal reflection stray light on the image. Figure 9C The reason for the internal stray light is as follows: when the inner aperture of the third spacer element P3 is relatively small, the inner aperture of the fourth spacer element P4 is relatively small, and the inner aperture of the fifth spacer element P5 is relatively large, the marginal rays refracted by the third lens E3 and the fourth lens E4 will hit the inner side surface of the fourth spacer element P4 and be reflected to form stray light. This part of the stray light will not be blocked by the fifth spacer element P5 and the subsequent spacer elements when further passing through the fifth lens E5, and thus will reach the photosensitive chip behind the lens together with the effective rays and form an image, resulting in a decrease in image quality. In other words, in this case, the stray light is formed on the inner surface of the fourth spacer element P4, and the fifth spacer element P5 cannot effectively block the continuous transmission of this internal reflection stray light, resulting in interference of this stray light on the image. As Figure 9B shown, by controlling the inner diameters of the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 within a reasonable range according to the conditional formula provided in this application, it is possible to ensure the effective rays required for imaging and block the excess rays at the edges of the lens, thereby reducing the risk of lens stray light.

[0063] Optionally, in an embodiment provided in this application, the prism P further has an incident surface and an exit surface located on both sides of the reflection surface. Both the incident surface and the exit surface are spherical surfaces. The incident surface is a convex surface and the exit surface is a concave surface. The axial distance Y from the intersection point of the incident surface and the optical axis to the image side surface of the sixth lens E6 satisfies: 23.90 mm < Y < 24.15 mm. By setting the optical power prism P with a convex incident surface and a concave exit surface, the object-side light ray aperture can be effectively reduced without changing the system aperture size, thereby reducing the screen occupation ratio. Satisfying the conditional formula 23.90 mm < Y < 24.15 mm can better improve the performance while keeping the overall structure compact when the focal length is fixed.

[0064] Optionally, in an embodiment provided by the present application, the maximum height L of the lens barrel P0 and the effective focal length f of the periscope lens satisfy: 0.35 < L / f < 0.51. Through the constraint of the above conditional formula, the length of the lens body can be controlled on the premise of ensuring performance parameters, thereby reducing the overall length and height of the module integration, and realizing the functions of being thin, light, and miniaturized.

[0065] Optionally, in an embodiment provided by the present application, the air gap T34 on the optical axis between the third lens E3 and the fourth lens E4, the air gap T45 on the optical axis between the fourth lens E4 and the fifth lens E5, the maximum thickness CP3 of the third spacer P3, and the maximum thickness CP4 of the fourth spacer P4 satisfy: 1.30 < (T34 + T45) / (CP3 + CP4) < 4.75. Based on the constraint of this conditional formula, by controlling the air gap on the optical axis between the third lens E3, the fourth lens E4, and the fifth lens E5 and the thickness of the spacer elements therebetween, the divergence angle and convergence ability of the marginal rays can be controlled, ensuring better imaging quality and marginal brightness; it can also ensure that the bending degrees of the third lens E3 and the fifth lens E5 are not too large, ensuring the processability of the lens, and at the same time effectively controlling the stray light generated by the fourth lens E4, improving the clarity of the picture.

[0066] Optionally, in an embodiment provided by the present application, the positive and negative attributes of the optical power of the first lens E1 and the sixth lens E6 are the same, and the positive and negative attributes of the optical power of the fifth lens E5 and the sixth lens E6 are different; for the effective focal length f5 of the fifth lens E5, the object-side inner diameter d5s of the fifth spacer P5, and the object-side inner diameter d4s of the fourth lens E4, they satisfy: 4.5 < |f5 / (d5s - d4s)| < 11.85. Through the constraint of this conditional formula, the first lens E1 and the sixth lens E6 have the same positive and negative attributes of optical power, and the fifth lens E5 and the sixth lens E6 have different positive and negative attributes of optical power, which can ensure the balanced light path trend of the system, make the lens aperture differences not large, and thus improve the overall assembly performance; based on the conditional formula 4.5 < |f5 / (d5s - d4s)| < 11.85, by controlling the optical power of the fifth lens E5, the height of the tail-end light rays can be effectively controlled, and by controlling the object-side inner diameter of the fifth spacer P5, it is beneficial to improve the imaging quality at the edge and reduce stray light. The preferred range of this conditional formula is 4.5 < |f5 / (d5s - d4s)| < 7.05.

[0067] Optionally, in an embodiment provided by the present application, the effective focal length f3 of the third lens E3, the air gap T34 on the optical axis between the third lens E3 and the fourth lens E4, and the object-side inner diameter d3s of the third spacer P3 satisfy: -2.15 mm -1 < f3 / T34 / d3s < -1.00 mm-1 Through the constraint of this conditional formula, controlling the ratio of the effective focal length of the third lens E3 to the air gap between the third lens E3 and the fourth lens E4 on the optical axis within a reasonable range can control the exit angle of light on the image side of the third lens E3, ensure a reasonable bending angle of the image side surface of the third lens E3, improve the lens processability. At the same time, by controlling the object-side inner diameter of the third spacer element P3, the formation of stray light of the third lens E3 can be controlled, unnecessary light passing can be reduced, and the imaging quality of the edge can also be improved.

[0068] Optionally, in an embodiment provided by the present application, the distance EP12 between the first spacer element P1 and the second spacer element P2 along the optical axis direction, the distance EP23 between the second spacer element P2 and the third spacer element P3 along the optical axis direction, and the central thickness CT2 of the second lens E2 satisfy: 1.40 < (EP12 + EP23) / CT2 < 2.05. Based on the constraint of this conditional formula, it helps to control the effective diameter difference between the first lens E1 and the second lens E2 and the thickness ratio of the second lens E2, ensure the forming process of the second lens E2, ensure the structural rationality of the two lenses, thereby improving the overall forming process and assembly stability of the lens and enhancing the yield of the system.

[0069] Optionally, in an embodiment provided by the present application, the sum ∑CP1 of the maximum thicknesses of all spacer elements between the first lens E1 and the second lens E2, the air gap T12 between the first lens E1 and the second lens E2 on the optical axis, the maximum thickness CP2 of the second spacer element P2, and the air gap T23 between the second lens E2 and the third lens E3 on the optical axis satisfy: 5.55 < ∑CP1 / T12 + CP2 / T23 < 12.15. Based on the constraint of the above conditional formula, the thickness of the second lens E2 can be controlled within a suitable range to ensure the forming stability of the lens; ensure that the deflection angles of light before and after the second lens E2 are not too large, reducing the sensitivity of the system; at the same time, it can indirectly control the edge thickness of the third lens E3 and make the light pass through the third lens E3 smoothly, ensuring the processability and thickness ratio of the molds of the two lenses, thereby being beneficial to the surface shape stability after the two lenses are formed, and ultimately contributing to the improvement of the lens quality. Optionally, the present application also provides a first auxiliary spacer element P1b (with a maximum thickness CP1b along the optical axis direction) between the first lens E1 and the second lens E2. The two ends of this spacer element are respectively abutted against the image side surface of the first spacer element P1 and the object side surface of the second lens E2, so that it can not only further fix the relative position of the second lens E2, but also block the edge of the second lens E2 to avoid the generation of stray light due to multiple reflections after light enters the edge of the second lens E2. The preferred range of this conditional formula is 5.55 < ∑CP1 / T12 + CP2 / T23 < 7.00.

[0070] Optionally, in an embodiment provided by the present application, the maximum thickness CP2 of the second spacer element P2, the spacing distance EP23 between the second spacer element P2 and the third spacer element P3 along the optical axis direction, and the central thickness CT3 of the third lens E3 satisfy: 1.85 < (CP2 + EP23) / CT3 < 2.75. Based on the constraints of the above conditional formula, the central thickness of the third lens E3 can be ensured to be within a reasonable range, the thickness ratio of the third lens E3 is restricted, the lens forming process is guaranteed, and at the same time, the edge thickness of the fourth lens E4 can be indirectly controlled and the light can pass through the fourth lens E4 smoothly, ensuring the processability and thickness ratio of the two lenses, thus being beneficial to the surface shape stability after the two lenses are formed, and ultimately contributing to the improvement of the lens quality.

[0071] Optionally, in an embodiment provided by the present application, the object-side inner diameter d0s of the lens barrel P0 and the object-side inner diameter d1s of the first spacer element P1 satisfy: 1.00 < d0s / d1s < 1.41. Based on the constraints of this conditional formula, controlling the object-side inner diameter of the lens barrel P0 can effectively ensure the aperture size of the lens, make the light input of the system sufficient, improve the overall light input of the optical system, so that this telephoto lens can also obtain good shooting clarity at night; at the same time, it can also restrict the formation of stray light, reduce the entry of excess light into the system, and improve the imaging quality.

[0072] Optionally, in an embodiment provided by the present application, the image-side inner diameter d0m of the lens barrel P0 and the image-side outer diameter D5m of the fifth spacer element P5 satisfy: 1.05 ≤ d0m / D5m ≤ 1.10. Through the constraints of this conditional formula, it is possible to avoid the excessive exit angle of light after passing through the sixth lens E6, thereby reducing the stray light caused by the secondary reflection of light on the image-side end face of the lens barrel P0, and at the same time restricting the outer dimension of the lens barrel P0 to ensure the miniaturization of the lens.

[0073] Optionally, in an embodiment provided by the present application, the maximum thickness CP4 of the fourth spacer element P4, the spacing distance EP45 between the fourth spacer element P4 and the fifth spacer element P5 along the optical axis direction, and the effective focal length f5 of the fifth lens E5 satisfy: -0.22 ≤ (CP4 + EP45) / f5 ≤ 0.20 and (CP4 + EP45) ≠ 0. By restricting the focal length of the fifth lens E5, the light height and light throughput of the system light entering the sixth lens E6 from the fifth lens E5 can be controlled, the effective diameter difference between the fifth lens E5 and the sixth lens E6 can be improved, and the light height difference can be reasonably controlled. Combining with the restriction of the edge thickness of the fifth lens E5, the forming difficulty of the fifth lens E5 can be reduced and the assembly stability of the fifth lens E5 and the front and rear lenses can be improved, thus ensuring the overall structural stability.

[0074] Optionally, in an embodiment provided by the present application, the minimum aperture d0smin of the lens barrel P0 on the object side and the inner diameter d3s of the third spacer element P3 on the object side satisfy: 0.85 < d0smin / d3s < 1.30. Based on the constraint of this conditional expression, the tendency of the light direction to change when passing through the first lens E1, the second lens E2, and the third lens E3 can be made smoother, avoiding the situation of too large a light deflection angle in the optical system, which is beneficial to reducing the sensitivity of the optical system, improving the lens processability, and at the same time ensuring smooth light transition and system stability.

[0075] The present application also provides a periscope lens, including:

[0076] A lens barrel P0, having an object-side end face and an image-side end face;

[0077] A prism P, placed on the object side of the lens barrel P0 and having a reflecting surface for reflecting light towards the object-side end face;

[0078] A lens group, mounted on the lens barrel P0, the lens group includes a first lens E1 arranged in sequence from the object-side end face to the image-side end face and coaxial, a second lens E2 with a positive focal power, a third lens E3 with a negative focal power, a fourth lens E4 with a negative focal power, a fifth lens E5, and a sixth lens E6; and

[0079] A spacer element group, mounted on the lens barrel P0, the spacer element group includes a first spacer element P1 placed on the image side of the first lens E1 and abutting against the image-side surface of the first lens E1, a second spacer 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 spacer 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 spacer element P4 placed on the image side of the fourth lens E4 and abutting against the image-side surface of the fourth lens E4, a fifth spacer element P5 placed on the image side of the fifth lens E5 and abutting against the image-side surface of the fifth lens E5;

[0080] The maximum height L of the lens barrel P0, the effective focal length f of the periscope lens, the air gap T34 between the third lens E3 and the fourth lens E4 on the optical axis, the air gap T45 between the fourth lens E4 and the fifth lens E5 on the optical axis, the maximum thickness CP3 of the third spacer element P3, and the maximum thickness CP4 of the fourth spacer element P4 satisfy:

[0081] 0.35 < L / f < 0.51; and

[0082] 1.30 < (T34 + T45) / (CP3 + CP4) < 4.75.

[0083] The present invention realizes a long focal length by setting a prism and reasonably distributing the optical power of the lenses to shorten the overall length. Further, the ratio of the maximum height of the lens barrel of the lens group to the effective focal length is restricted. While ensuring the effective focal length of the lens, the length of the entire lens is controlled, thereby reducing the overall length and height after module integration. However, due to performance requirements, the air gaps between some lenses are relatively large. On the one hand, it is not conducive to the lens support, and on the other hand, the excessive thickness of the lens edge will affect the lens processability. By restricting the air gaps between the third, fourth, and fifth lenses and the thickness of the spacer elements, the divergence angle of the light at the lens edge can be controlled and the light converging ability of the lens can be improved, ensuring good imaging quality and edge brightness. At the same time, the maximum thicknesses of the third and fourth spacer elements are reasonably set to ensure the overall curvature of the third, fourth, and fifth lenses and guarantee the lens processability.

[0084] Some specific but non-limiting examples of the embodiments of the present application will be described in more detail below with reference to the accompanying drawings. It can be understood that any one of the following Examples 1 to 3 is applicable to all embodiments of the present application. In the three embodiments given in the present application, each embodiment includes three working conditions. The parameters (surface type, radius of curvature, central thickness, material, conic coefficient, etc.) of the lenses used for imaging are the same, and the distances between the lenses are the same. The difference lies in the parameters (thickness, object-side inner diameter, image-side inner diameter, etc.) of the structures (lens barrel, spacer element) used for assisting imaging.

[0085] For the convenience of description, in the following examples, OBJ represents the object plane of the lens, STO represents the surface of the aperture stop, f represents the effective focal length of the periscope lens, fi represents the effective focal length of the i-th lens, i = 1, 2, 3, 4, 5, 6, Semi-FOV represents half of the maximum field of view angle, and FNO represents the aperture size of the periscope lens.

[0086] In addition, please refer again to Figure 1 , the surface numbers of the functional surfaces passed by the light along the reverse direction of the optical path are sequentially defined as S1 to SN, where S1 represents the surface number of the first functional surface passed by the light along the reverse direction of the optical path, and SN represents the surface number of the N-th functional surface passed by the light along the reverse direction of the optical path. Specifically, S1, S2, and S3 respectively represent the incident surface, reflection surface, and exit surface of the prism P, S4 and S5 respectively represent the object side surface and image side surface of the first lens E1, S6 and S7 respectively represent the object side surface and image side surface of the second lens E2, S8 and S9 respectively represent the object side surface and image side surface of the third lens E3, S10 and S11 respectively represent the object side surface and image side surface of the fourth lens E4, S12 and S13 respectively represent the object side surface and image side surface of the fifth lens E5, and S14 and S15 respectively represent the object side surface and image side surface of the sixth lens E6.

[0087] The optical path is explained as follows: The light rays emitted by the object enter the prism from S1, are reflected by S2, and exit from S3, and then pass through S4 to S15 in sequence and reach the photosensitive chip behind the lens.

[0088] The aspheres involved in this patent satisfy the following formula:

[0089]

[0090] In the above formula, x represents the sagitta, which is the distance from the vertex of the aspheric surface to the position at a height of h along the optical axis direction of the aspheric surface, c represents the curvature, h represents the radial distance from the optical axis, k represents the conic constant, and Ai represents the i-th order constant.

[0091] In the embodiments provided below, the concave and convex directions of the object side and the image side of each lens are referenced to the lens itself. Please refer to Figure 3A , taking the fourth lens E4 and the fifth lens E5 arranged in sequence from the object to the image as an example. If the concave and convex type of the surface of the fourth lens E4 is convex on the object side and concave on the image side, it means that: the object side of the fourth lens E4 gradually moves away from the fifth lens E5 from the edge to the center of the lens, and the image side of the fourth lens E4 gradually moves away from the fifth lens from the edge to the center of the lens.

[0092] Please refer to Figure 2 , Figure 2 shows a schematic diagram of the dimension marking of an optical imaging lens of the present application, Figure 2 in which parameters such as d1s, d3s, d3m, d4s, d4m, d5s, D5m, d0s, d0m, CP1, EP12, CP2, EP23, CP3, CP4, EP45, L, CP4, EP45, etc. are marked to clearly and intuitively understand the meaning of the parameters. For the convenience of describing the surface shape of the optical imaging lens and specific lenses, these parameters will no longer be shown in the subsequent description of specific embodiments. Embodiment

[0093] As Figures 3A to 3C shown, this embodiment involves three working conditions: 1-1, 1-2, and 1-3. Figure 3A is a schematic diagram of the structure of the periscope lens in working condition 1-1, Figure 3B is a schematic diagram of the structure of the periscope lens in working condition 1-2, Figure 3C is a schematic diagram of the structure of the periscope lens in working condition 1-3. In working conditions 1-1, 1-2, and 1-3, the parameters (surface shape, radius of curvature, thickness, material, and conic constant) of the lenses for imaging are the same, while the parameters (maximum thickness, inner diameter, lens edge thickness) of the lens barrels and multiple spacer elements for assisting imaging are at least partially different. See Table 8 for details.

[0094] Specifically, in this embodiment, the optical powers and the surface concavity / convexity types of the lenses in the lens group are as follows. The positive / negative attributes of the optical powers of the first lens E1 to the sixth lens E6 are in sequence: positive, positive, negative, negative, negative, positive. The first lens E1 has a convex object side and a concave image side, the second lens E2 has a convex object side and a convex image side, the third lens E3 has a convex object side and a concave image side, the fourth lens E4 has a convex object side and a concave image side, the fifth lens E5 has a concave object side and a convex image side, and the sixth lens E6 has a convex object side and a convex image side.

[0095] In this embodiment, except for the first spacer element P1 in the spacer element group, the object side and the image side of the remaining spacer elements are respectively abutted against two adjacent lenses. In this embodiment, between the first lens E1 and the second lens E2, there are provided, in sequence from the object to the image, the first spacer element P1 and the first auxiliary spacer element P1b. The object side and the image side of the first spacer element P1 are respectively abutted against the first lens E1 and the first auxiliary spacer element P1b, and the image side surface of the first auxiliary spacer element P1b is abutted against the object side surface of the second lens E2.

[0096] Table 1 gives the design data of the lenses in the periscope lens of the first embodiment, and Table 2 gives the aspheric coefficients of a total of twelve surfaces from S4 to S15. In the table, S16 and S17 respectively represent the object side surface and the image side surface of the filter, and S18 represents the receiving surface of the sensor.

[0097] Table 1

[0098]

[0099] Table 2

[0100]

[0101] After simulation tests, the results are as Figure 4A and Figure 4B shown. Figure 4A is the distortion curve graph of the periscope lens in the first embodiment, Figure 4B is the longitudinal chromatic aberration curve graph of the periscope lens in the first embodiment. According to Figures 4A to 4B it can be known that the periscope lens of the first embodiment can achieve good imaging quality. Embodiment

[0102] As Figures 5A to 5C shown, this embodiment relates to three working conditions: 2-1, 2-2, and 2-3. Figure 5A is the structural schematic diagram of the periscope lens in the working condition 2-1, Figure 5B is the structural schematic diagram of the periscope lens in the working condition 2-2, Figure 5CIt is a schematic structural diagram of the periscope lens in working condition 2-3. In working conditions 2-1, 2-2, and 2-3, the parameters (surface type, radius of curvature, thickness, material, and conic coefficient) of the lenses for imaging are the same, while the parameters of the lens barrel and multiple spacer elements for assisting imaging are at least partially different. See Table 8 for details.

[0103] Specifically, in this embodiment, the optical power and surface concavity / convexity types of each lens in the lens group are as follows. The positive / negative attributes of the optical power of the first lens E1 to the sixth lens E6 are in turn: positive, positive, negative, negative, negative, positive. The first lens E1 has a convex object side and a concave image side, the second lens E2 has a convex object side and a convex image side, the third lens E3 has a convex object side and a concave image side, the fourth lens E4 has a convex object side and a concave image side, the fifth lens E5 has a concave object side and a convex image side, and the sixth lens E6 has a convex object side and a convex image side. In this embodiment, except for the first spacer element P1 and the fifth spacer element P5 in the spacer element group, the object side and image side of the remaining spacer elements are respectively abutted against two adjacent lenses. In this embodiment, between the first lens E1 and the second lens E2, the first spacer element P1 and the first auxiliary spacer element P1b are provided in sequence from the object to the image. The object side and image side of the first spacer element P1 are respectively abutted against the first lens E1 and the first auxiliary spacer element P1b, and the image side surface of the first auxiliary spacer element P1b is abutted against the object side surface of the second lens E2. Between the fifth lens E5 and the sixth lens E6, the fifth spacer element P5 and the fifth auxiliary spacer element P5b are provided in sequence from the object to the image. The object side and image side of the fifth spacer element P5 are respectively abutted against the fifth lens E5 and the fifth auxiliary spacer element P5b, and the image side of the fifth auxiliary spacer element P5b is abutted against the object side surface of the sixth lens E6.

[0104] Table 3 gives the design data of the lenses in the periscope lens in the second embodiment, and Table 4 gives the aspheric coefficients of a total of twelve surfaces from S4 to S15. In the table, S16 and S17 respectively represent the object side surface and the image side surface of the filter placed on the image side of the lens barrel P0, and S18 represents the receiving surface of the sensor placed on the image side of the filter.

[0105] Table 3

[0106]

[0107] Table 4

[0108]

[0109] After simulation tests, the results are as Figure 6A and Figure 6B shown. Figure 6A is the distortion curve graph of the periscope lens in the second embodiment, Figure 6B is the longitudinal chromatic aberration curve graph of the periscope lens in the second embodiment. According to Figures 6A to 6B it can be seen that the periscope lens in the second embodiment can achieve good imaging quality. Embodiment

[0110] As shown Figures 7A to 7C in the figure, this embodiment involves three working conditions: 3-1, 3-2, and 3-3. Figure 7A FIG. is a schematic structural diagram of the periscope lens in working condition 3-1. Figure 7B FIG. is a schematic structural diagram of the periscope lens in working condition 3-2. Figure 7C FIG. is a schematic structural diagram of the periscope lens in working condition 3-3. In working conditions 3-1, 3-2, and 3-3, the parameters (surface type, radius of curvature, thickness, material, and conic coefficient) of the lenses for imaging are the same, while the parameters of the lens barrel and multiple spacer elements for assisting imaging are at least partially different. See Table 8 for details.

[0111] Specifically, in this embodiment, the optical power and surface concavity / convexity types of each lens in the lens group are as follows. The positive / negative attributes of the optical power of the first lens E1 to the sixth lens E6 are in turn: negative, positive, negative, negative, positive, negative. The first lens E1 has a convex object side and a concave image side, the second lens E2 has a convex object side and a concave image side, the third lens E3 has a convex object side and a concave image side, the fourth lens E4 has a concave object side and a convex image side, the fifth lens E5 has a convex object side and a convex image side, and the sixth lens E6 has a concave object side and a concave image side. In this embodiment, except for the first spacer element P1 in the spacer element group, the object side and image side of the remaining spacer elements are respectively in contact with two adjacent lenses. In this embodiment, between the first lens E1 and the second lens E2, there are successively arranged a first spacer element P1 and a first auxiliary spacer element P1b from the object side to the image side. The object side and image side of the first spacer element P1 are respectively in contact with the first lens E1 and the first auxiliary spacer element P1b, and the image side surface of the first auxiliary spacer element P1b is in contact with the object side surface of the second lens E2.

[0112] Table 5 gives the design data of the lenses in the periscope lens in the third embodiment, and Table 6 gives the aspheric coefficients of a total of twelve surfaces from S4 to S15. In the table, S16 and S17 respectively represent the object side surface and image side surface of the filter placed on the image side of the lens barrel P0, and S18 represents the receiving surface of the sensor placed on the image side of the filter.

[0113] Table 5

[0114]

[0115] Table 6

[0116]

[0117] After simulation tests, the results are as shown Figure 8A and Figure 8B in the figure. Figure 8A FIG. is the distortion curve graph of the periscope lens in the third embodiment. Figure 8B FIG. is the longitudinal chromatic aberration curve graph of the periscope lens in the third embodiment. According to Figures 8A to 8BIt can be seen that the periscope lens of the third embodiment can achieve good imaging quality.

[0118] The optical parameters of the first to third embodiments are shown in Table 7:

[0119] Table 7

[0120]

[0121] The corresponding structural black object data of the first to third embodiments are shown in Table 8:

[0122] Table 8

[0123]

[0124] The relationships satisfied by the data of the first to third embodiments are shown in Table 9:

[0125] Table 9

[0126]

[0127] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0128] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A periscope lens, characterized in that: include: A lens barrel having an object side end surface and an image side end surface; A lens group, mounted on the lens barrel, comprising a first lens with optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with negative optical power, a fifth lens with optical power, and a sixth lens with optical power, which are arranged in sequence from the object side end face to the image side end face and arranged on a common optical axis; a spacer element group, mounted on the lens barrel, the spacer element group comprising a first spacer element disposed on the image side of the first lens and abutting against the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and abutting against the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and abutting against the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and abutting against the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and abutting against the image side surface of the fifth lens; as well as a prism, disposed on the object side of the lens barrel and having a reflective surface, wherein the reflective surface is arranged obliquely to the optical axis of the lens group and an angle between a normal line of the reflective surface and the optical axis of the lens group is an acute angle; The air gap T34 between the third lens and the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the object side inner diameter d3s of the third spacer element, the image side inner diameter d3m of the third spacer element, the object side inner diameter d4s of the fourth spacer element, the image side inner diameter d4m of the fourth spacer element, and the object side inner diameter d5s of the fifth spacer element satisfy the following conditions: 0.33≤(T34+T45) / L≤0.37; 0.10≤(d4m-d3s) / d3m<0.85; and 0.29<(d5s-d3m) / d4s<0.

6.

2. The periscope lens according to claim 1, characterized in that: The prism also has an incident surface and an exit surface located on both sides of the reflecting surface, the incident surface and the exit surface are both spherical surfaces, the incident surface is convex, and the exit surface is concave, and the axial distance Y from the intersection of the incident surface and the optical axis to the image side surface of the sixth lens satisfies: 23.90 mm <Y<24.15mm。 3. The periscope lens according to any one of claim 1 or claim 2, characterized in that: The maximum height L of the lens barrel and the effective focal length f of the periscope lens satisfy the following conditions: 0.35 <L / f<0.51。 4. The periscope lens according to any one of claims 1 or 2, characterized in that: An air gap T34 on the optical axis between the third lens and the fourth lens, an air gap T45 on the optical axis between the fourth lens and the fifth lens, a maximum thickness CP3 of the third spacing element, and a maximum thickness CP4 of the fourth spacing element satisfy the following: 1.30<(T34+T45) / (CP3+CP4)<4.

75.

5. The periscope lens according to any one of claim 1 or claim 2, characterized in that: The positive and negative properties of the optical power of the first lens and the optical power of the sixth lens are the same, and the positive and negative properties of the optical power of the fifth lens and the optical power of the sixth lens are different; The effective focal length f5 of the fifth lens, the object side inner diameter d5s of the fifth spacing element, and the object side inner diameter d4s of the fourth lens satisfy the following relationship: 4.5<|f5 / (d5s-d4s)|<11.

85.

6. The periscope lens according to any one of claim 1 or claim 2, characterized in that: The effective focal length f3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis, and the object side inner diameter d3s of the third spacing element satisfy: -2.15 mm -1 <f3 / T34 / d3s<-1.00mm -1 .

7. The periscope lens according to claim 1, characterized in that: The spacing distance EP12 between the first spacing element and the second spacing element along the optical axis, the spacing distance EP23 between the second spacing element and the third spacing element along the optical axis, and the center thickness CT2 of the second lens satisfy: 1.40<(EP12+EP23) / CT2<2.

05.

8. The periscope lens according to claim 1, characterized in that: The sum of the maximum thicknesses ∑CP1 of all spacing elements between the first lens and the second lens, the air gap T12 between the first lens and the second lens on the optical axis, the maximum thickness CP2 of the second spacing element, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 5.55<∑CP1 / T12+CP2 / T23<12.

15.

9. The periscope lens according to claim 1, characterized in that: The maximum thickness CP2 of the second spacer element, the spacing distance EP23 between the second spacer element and the third spacer element along the optical axis, and the center thickness CT3 of the third lens satisfy the following: 1.85<(CP2+EP23) / CT3<2.

75.

10. The periscope lens according to any one of claims 7 to 9, characterized in that: The object side inner diameter d0s of the lens barrel and the object side inner diameter d1s of the first spacing element satisfy: 1.00 <d0s / d1s<1.41。 11. The periscope lens according to any one of claims 7 to 9, characterized in that: The image side inner diameter d0m of the lens barrel and the image side outer diameter D5m of the fifth spacer element satisfy the following: 1.05≤d0m / D5m≤1.

10.

12. The periscope lens according to any one of claims 7 to 9, characterized in that: The maximum thickness CP4 of the fourth spacer element, the spacing distance EP45 between the fourth spacer element and the fifth spacer element along the optical axis, and the effective focal length f5 of the fifth lens satisfy: -0.22≤(CP4+EP45) / f5≤0.20, and (CP4+EP45) / f5≠0.

13. The periscope lens according to any one of claims 7 to 9, characterized in that: The minimum aperture d0smin of the lens barrel on the object side and the inner diameter d3s of the third spacing element on the object side satisfy the following conditions: 0.85 <d0smin / d3s<1.30。

Images