Periscope optical lens assembly, lens module and electronic equipment

Abstract

The present application discloses a periscope optical lens group, a lens module, and an electronic device. The periscope optical lens group includes a first lens with positive refractive power, a first light reflection element, a second lens with positive refractive power, and third to sixth lenses with refractive power, which are sequentially arranged from the object side to the image side. The first lens is arranged in front of the first light reflection element so that the incident light passes through the first lens and then bends towards the optical axis direction and converges onto the first reflection surface of the first light reflection element, increasing the light incident amount of the periscope optical lens group. The periscope optical lens group also satisfies the conditional formula 1 < TL1 / TL2 < 1.25 (TL1 is the sum of the distances from the first reflection surface of the first light reflection element to the object side surface of the first lens and the object side surface of the second lens along the optical axis direction, and TL2 is the distance from the object side surface of the second lens to the image side surface of the sixth lens along the optical axis direction), further meeting the requirements of the miniaturization design of the periscope optical lens group while ensuring an increase in the light flux.

Description

Technical Field

[0001] The present application relates to the technical field of optical systems, and in particular to a periscope optical lens assembly, a lens module and an electronic device. Background Art

[0002] As electronic products such as mobile phones, drones, and tablets with miniaturized and ultra-thin designs become more and more popular among consumers, the size of the lens modules installed in electronic products also needs to be compressed to accommodate the terminal products. However, as the size of the lens modules is compressed, the imaging quality of the lens modules will be affected. A periscope lens module is a lens module that can perform optical zoom inside the fuselage. It mainly includes a reflection module and a lens module. The reflection module reflects the imaging light to a certain angle and then injects it into the lens module, which is used to focus and image. In related technologies, the periscope lens module has a small amount of light transmission, which makes the field of view of the periscope lens module small and the long-range shooting effect poor. Summary of the invention

[0003] The present application provides a periscope optical lens group, a lens module and an electronic device, which can meet the needs of high-definition shooting and long-range shooting on the basis of realizing a miniaturized design of the periscope optical lens group.

[0004] In a first aspect, an embodiment of the present application provides a periscope optical lens assembly, including a first lens, a first light reflecting element that folds the light path, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged in sequence from the object side to the image side; wherein:

[0005] The first lens has positive refractive power, and the object side surface of the first lens is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0006] The second lens has positive refractive power, and the object side surface of the second lens is convex at the near optical axis;

[0007] The third lens has a refractive power, and the object side surface of the third lens is a convex surface near the optical axis;

[0008] The fourth lens has a refractive power, and the object side surface of the fourth lens is a convex surface at the near optical axis, and the image side surface is a concave surface at the near optical axis;

[0009] The fifth lens has a refractive power, and the object side surface of the fifth lens is a concave surface at the near optical axis, and the image side surface is a convex surface at the near optical axis;

[0010] The sixth lens has a refractive power, and the object side surface of the sixth lens is a convex surface near the optical axis, and the image side surface is a concave surface near the optical axis;

[0011] The first light reflection element has a first reflection surface, and the periscope optical lens group further satisfies the conditional formula: 1 < TL1 / TL2 < 1.25 (1), where TL1 is the total distance from the first reflection surface of the first light reflection element to the object side surface of the first lens and the object side surface of the second lens along the optical axis direction, and TL2 is the distance from the object side surface of the second lens to the image side surface of the sixth lens along the optical axis direction.

[0012] Based on the periscope optical lens group of the embodiments of the present application, by reasonably matching the surface types of each lens and arranging the first lens with positive refractive power in front of the first light reflection element, the originally parallel incident light can be bent towards the optical axis direction after passing through the first lens and then converge on the first reflection surface of the first light reflection element, which can effectively shorten the volume of the entire periscope optical lens group and effectively increase the light input amount of the periscope optical lens group. The structures of the first lens, the first light reflection element, and the second lens also satisfy the above conditional formula (1) to control the distance between the first lens, the first light reflection element, and the second lens, meeting the requirements of the miniaturized design of the periscope optical lens group while ensuring an increase in the light flux of the entire periscope optical lens group.

[0013] In some exemplary embodiments, the included angle between the first reflection surface and the optical axis of the first lens is 45 degrees. The periscope optical lens group further includes a second light reflection element that deflects the optical path. The second light reflection element is located on the image side of the sixth lens, and the first reflection surface of the first light reflection element is parallel or perpendicular to the second reflection surface of the second light reflection element.

[0014] Based on the above embodiments, the light emitted from the first lens can be bent by 90 degrees and then projected onto the second lens in sequence. By setting the first reflection surface of the first light reflection element to be parallel or perpendicular to the second reflection surface of the second light reflection element, the direction of each beam of light emitted from the second light reflection element can be made parallel to the direction of incidence into the first lens, effectively reducing the installation space occupied by the periscope optical lens group while changing the optical path direction.

[0015] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.5 < ETL4 / CTL4 < 2.5 (2), where ETL4 is the thickness of the edge of the effective light passing aperture of the fourth lens along the direction parallel to the optical axis; CTL4 is the thickness of the center of the fourth lens on the optical axis.

[0016] Based on the above embodiments, by controlling the ratio of the two parameters of the thickness of the edge of the effective light passing aperture of the fourth lens along the direction parallel to the optical axis and the thickness of the center of the fourth lens on the optical axis to satisfy the above conditional formula (2), the optical path difference of the periscope optical lens group can be effectively balanced, enabling the central light and the marginal light passing through the fourth lens to converge near the image plane of the fourth lens, realizing the function of correcting field curvature, ensuring imaging stability, and also ensuring the forming yield rate of the fourth lens.

[0017] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.1mm -1 <FNO / EFL < 0.25mm -1 (3), where FNO is the f-number of the periscope optical lens group; EFL is the effective focal length of the periscope optical lens group.

[0018] Based on the above embodiments, the periscope optical lens group is prone to a small light transmission amount. Adjusting the f-number of the periscope optical lens group can provide sufficient light transmission amount for the periscope optical lens group to take pictures. At the same time, after controlling the ratio of the f-number of the periscope optical lens group and the effective focal length of the periscope optical lens group to an appropriate range, the requirements for high-quality and high-definition shooting can also be met. In this embodiment, by controlling the ratio of the f-number of the periscope optical lens group and the effective focal length of the periscope optical lens group to satisfy the above conditional formula (3), on the basis of meeting the requirements for improving the shooting image quality, the requirements for the miniaturized design of the periscope optical lens group can also be met.

[0019] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.2mm -1 <FNO / Imgh < 0.5mm -1 (4), where FNO is the f-number of the periscope optical lens group; Imgh is the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group.

[0020] Based on the above embodiments, on the basis of adjusting the f-number of the periscope optical lens group to meet the requirement of increasing the light transmission amount, it is also necessary to reasonably match the diagonal length of the effective pixel area for photosensing on the imaging surface of the periscope optical lens group to better meet the requirement of the clarity of the shooting picture. Therefore, by controlling the ratio of the f-number of the periscope optical lens group and the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group to satisfy the above conditional formula (4), the effective pixel area for photosensing on the imaging surface of the periscope optical lens group is large enough to receive all the light from the lens, and the periscope optical lens group can also obtain sufficient light transmission amount to meet the requirements of high-quality and high-definition shooting.

[0021] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 4 < F1 / EFL < 15 (5), where F1 is the focal length of the first lens and EFL is the effective focal length of the periscope optical lens group.

[0022] Based on the above embodiments, a first lens with a positive bending force is disposed in front of the first light reflection element, which can deflect the originally parallel vertically incident light toward the optical axis direction and then the light is incident on the first light reflection element and the lens group at the rear end, increasing the light input amount of the periscope optical lens group. By controlling the ratio of the focal length of the first lens to the effective focal length of the periscope optical lens group to satisfy the above conditional formula (5), it can ensure that the light from the object side is better converged on the imaging surface of the periscope optical lens group after passing through each lens, and can also ensure that the periscope optical lens group has a good light transmission amount.

[0023] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 1 < EFL / Imgh < 2.5 (6), where EFL is the effective focal length of the periscope optical lens group, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group.

[0024] Based on the above embodiments, increasing the effective focal length EFL of the periscope optical lens group and the diagonal length Imgh of the effective photosensitive area on the imaging surface of the periscope optical lens group can meet the requirements of long focal length and large image surface shooting of the periscope optical lens group, so as to obtain a higher resolution and clearer image quality. Further, by controlling the ratio of the two parameters EFL and Imgh to satisfy the above conditional formula (6), on the basis of meeting the shooting requirements, the miniaturization design requirements of the periscope optical lens group can also be met.

[0025] In some exemplary embodiments, the periscope optical lens group further includes a diaphragm disposed on the object side surface of the second lens, and the periscope optical lens group satisfies the conditional formula: 13 mm < DL * FNO < 18 mm (7), where DL is the diameter size of the effective light transmission aperture of the diaphragm; FNO is the aperture number of the periscope optical lens group.

[0026] Based on the above embodiments, by controlling the ratio of the diameter size DL of the effective light transmission aperture of the diaphragm to the aperture number FNO of the periscope optical lens group to satisfy the above conditional formula (7), the ratio of the two parameters DL and FNO can be adjusted to a suitable range to ensure that the periscope optical lens group has the best light transmission amount and image clarity.

[0027] In some exemplary embodiments, the periscope optical lens group further includes a diaphragm disposed on the object side surface of the second lens, and the periscope optical lens group satisfies the conditional formula: 0.5 < DL / Imgh < 0.8 (8), where DL is the diameter size of the effective light transmission aperture of the diaphragm, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group.

[0028] Based on the above embodiment, the diameter DL of the effective aperture of the aperture determines the light throughput of the entire periscope optical lens assembly, and the diagonal length Imgh of the effective photosensitive area on the imaging plane of the periscope optical lens assembly determines the image clarity and pixel size of the entire periscope optical lens assembly. By controlling DL and the ratio of the two parameters to satisfy the above conditional formula (8), it is possible to ensure that the periscope optical lens assembly has sufficient light throughput, thereby ensuring the clarity of the image obtained on the imaging plane.

[0029] In some exemplary embodiments, the periscope optical lens assembly satisfies the condition: 5mm 2 <(R5*R6) / (R5 / R6)<110mm 2 (9), wherein R5 is the curvature radius of the object side surface of the third lens, and R6 is the curvature radius of the image side surface of the third lens.

[0030] Based on the above embodiment, by controlling the two parameters of the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens to satisfy the above conditional formula (9), R5 and R6 can be adjusted to a suitable range, the optical path difference between the edge light and the paraxial light of the periscope optical lens group can be balanced, the field curvature and astigmatism can be corrected, and at the same time, the system sensitivity can be reduced and the assembly stability can be improved.

[0031] In a second aspect, an embodiment of the present application provides a lens module, comprising a photosensitive element and the periscope optical lens group as described above, wherein the photosensitive element is arranged in an imaging plane of the periscope optical lens group, wherein the periscope optical lens group is used to receive light reflected by the photographed object and project it to the photosensitive element, and the photosensitive element is used to convert the light into an image signal.

[0032] Based on the lens module provided in the embodiment of the present application, on the basis that the periscope optical lens group meets the requirements of high-definition shooting and miniaturized design, the lens module equipped with the periscope optical lens group as described above can also meet the requirements of high-definition shooting and miniaturized design, so that the lens module can be installed in a relatively narrow installation space, thereby improving the applicability of the lens module.

[0033] In a third aspect, an embodiment of the present application provides an electronic device, comprising a housing and a lens module as described above, wherein the lens module is installed in the housing.

[0034] Based on the electronic device provided in the embodiment of the present application, by installing the lens module as described above in the electronic device, the electronic device can also meet the high-definition shooting requirements, and the electronic device can also reduce the volume of the electronic device based on the lens module to meet the miniaturization design requirements of the electronic device.

[0035] The present application provides a periscope optical lens group, a lens module, and an electronic device. By reasonably matching the surface shapes of each lens and arranging the first lens with positive refractive power in front of the first light reflection element, the originally parallel incident light can be bent towards the optical axis direction after passing through the first lens and converge on the first light reflection element, effectively shortening the volume of the entire periscope optical lens group. Additionally, the light input amount of the periscope optical lens group can be increased to expand the field of view range, meeting the requirements for high-definition images and long-distance shooting. It is also set that the first lens, the first light reflection element, and the second lens satisfy the condition 1 < TL1 / TL2 < 1.25. While ensuring an increase in the light flux of the entire periscope optical lens group, it further meets the requirements for the miniaturized design of the periscope optical lens group, enabling the lens module and the electronic device equipped with the periscope optical lens group to also achieve high-definition shooting and miniaturized design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 Structural schematic diagram of the periscope optical lens group provided in Embodiment 1 of the present application;

[0038] Figure 2 Spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the periscope optical lens group provided in Embodiment 1 of the present application;

[0039] Figure 3 Structural schematic diagram of the periscope optical lens group provided in Embodiment 2 of the present application;

[0040] Figure 4 Spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the periscope optical lens group provided in Embodiment 2 of the present application;

[0041] Figure 5 Structural schematic diagram of the periscope optical lens group provided in Embodiment 3 of the present application;

[0042] Figure 6 Spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the periscope optical lens group provided in Embodiment 3 of the present application;

[0043] Figure 7 Structural schematic diagram of the periscope optical lens group provided in Embodiment 4 of the present application;

[0044] Figure 8A spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the periscope optical lens assembly provided in Example 4 of the present application;

[0045] Fig. 9 A schematic diagram of the structure of a periscope optical lens assembly provided in Embodiment 5 of the present application;

[0046] Fig.10 A spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the periscope optical lens assembly provided in Example 5 of the present application;

[0047] Fig.11 A schematic diagram of the structure of a periscope optical lens assembly provided in Example 6 of the present application;

[0048] Fig.12 The spherical aberration curve diagram, astigmatism curve diagram, and distortion curve diagram of the periscope optical lens assembly provided in Example 6 of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] like Figures 1 to 12 As shown, the embodiment of the present application provides a periscope optical lens group, including a first lens L1, a first light reflecting element F1 that folds the light path, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are arranged in sequence from the object side to the image side. The periscope optical lens group also includes an imaging surface IMG. The light from the object side passes through the first lens L1 and then enters the first light reflecting element F1. The light path is folded by the first light reflecting element F1 and then projected to the second lens L2, and then passes through the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 and then projected to the imaging surface IMG. The imaging surface IMG can be used to set optical elements. The light after passing through the sixth lens L6 can be received by the optical elements in the imaging surface IMG and converted into image signals. The optical elements then transmit the image signals to other control systems for image analysis and other processing.

[0051] The first light reflecting element F1 may be a prism with a right triangle cross section, the first incident surface S3 and the first exit surface S5 of the first light reflecting element F1 are respectively located on the surface where the right-angled side of the first light reflecting element F1 is located, the first reflection surface S4 is located on the surface where the hypotenuse is located, the first lens L1 is arranged toward the first incident surface S3, the second lens L2 is arranged toward the first exit surface S5, the angle between the first reflection surface S4 and the optical axis of the first lens L1 is 45 degrees, so that the light emitted from the first lens L1 can be bent 90 degrees on the first reflection surface S4 and then projected to the second lens L2. By setting the first light reflecting element F1 to change the direction of the light path, the zoom direction of the periscope optical lens group is converted into a direction perpendicular to the optical axis of the first lens L1, so that the horizontal zoom depth of the periscope optical lens group is converted into a vertical zoom depth, thereby saving the zoom space in the horizontal direction of the periscope optical lens group, and facilitating the installation of the periscope optical lens group in the lens module or electronic equipment to achieve the purpose of reducing the thickness of the lens module or electronic equipment.

[0052] The periscope optical lens assembly may further include a second light reflecting element F2 that causes the optical path to bend. The second light reflecting element F2 may also be selected to be a prism with a triangular cross-section. The second light reflecting element F2 also includes a second incident surface S16 and a second exit surface S18 located at two right-angled sides and a second reflection surface S17 located at the hypotenuse. The sixth lens L6 is arranged toward the second incident surface S16, and the imaging surface IMG is arranged toward the second exit surface S18. The second reflection surface S17 is parallel or perpendicular to the first reflection surface of the first light reflecting element F1, so that the direction in which each beam of light is emitted from the second light reflecting element F2 is parallel to the direction in which it is incident on the first lens L1. Specifically, the installation method of the second reflection surface S17 of the second light reflecting element F2 relative to the first reflection surface S4 of the first light reflecting element F1 can be selected according to the zoom depth requirement and the optical path conversion requirement.

[0053] The periscope optical lens assembly may further include an aperture stop disposed on the object side of the second lens L2. Further, the aperture stop may be disposed at the edge of the object side of the second lens L2 to ensure the light flux of each lens installed at the rear end of the second lens L2.

[0054] The first lens L1 has positive refractive power, and the object-side surface of the first lens L1 is convex at the near optical axis, and the image-side surface of the first lens L1 is concave at the near optical axis.

[0055] The second lens L2 has positive refractive power, and the object-side surface of the second lens L2 is convex at the near optical axis, and the image-side surface of the second lens L2 can be convex, concave or flat at the near optical axis.

[0056] The third lens L3 may have positive or negative refractive power, and the object-side surface of the third lens L3 is convex at the near optical axis, and the image-side surface of the third lens L3 may be convex, concave or flat at the near optical axis.

[0057] The fourth lens L4 may have a positive refractive power or a negative refractive power, and the object side surface of the fourth lens L4 is convex near the optical axis, and the image side surface is concave near the optical axis.

[0058] The fifth lens L5 may have a positive refractive power or a negative refractive power, and the object side surface of the fifth lens L5 is concave near the optical axis, and the image side surface is convex near the optical axis.

[0059] The sixth lens L6 may have a positive refractive power or a negative refractive power, and the object side surface of the sixth lens L6 is convex near the optical axis, and the image side surface is concave near the optical axis.

[0060] The periscope optical lens group also satisfies the conditional formula: 1 < TL1 / TL2 < 1.25 (1), where TL1 is the sum of the distances from the reflecting surface of the first light reflecting element F1 to the object side surface of the first lens L1 and the object side surface of the second lens L2 along the optical axis direction, and TL2 is the distance from the image side surface of the second lens L2 to the image side surface of the sixth lens L6 along the optical axis direction.

[0061] Based on the periscope optical lens group of the embodiment of the present application, by reasonably matching the lens surface types of each lens and arranging the first lens L1 with a positive refractive power in front of the first light reflecting element F1, the originally parallel incident light can be bent towards the optical axis direction after passing through the first lens L1 and converged on the first reflecting surface S4 of the first light reflecting element F1, which can effectively shorten the volume of the entire periscope optical lens group and effectively increase the light input amount of the periscope optical lens group. The periscope optical lens group is also set to satisfy the above conditional formula (1) to control the spacing among the first lens L1, the first light reflecting element F1, and the second lens L2, so as to meet the requirements of miniaturized design of the periscope optical lens group while ensuring an increase in the light flux of the entire periscope optical lens group. If TL1 / TL2 ≥ 1.25, although the requirements of system optical path conversion and light throughput can be met, it will make the structures of the first lens L1, the first light reflecting element F1, and the second lens L2 not compact enough, increasing the volume of the entire lens group, or making the lens group structure behind the first light reflecting element F1 too compact, resulting in a decline in imaging performance, and will also increase the sensitivity of the processing technology, thereby increasing the assembly difficulty and reducing the forming and assembly yield. If TL1 / TL2 ≤ 1, it will cause the overall structure of the periscope optical lens group to be too compact, making the space for placing the first light reflecting element F1 between the first lens L1 and the second lens L2 limited, increasing the assembly difficulty.

[0062] The periscope optical lens group further includes an infrared cut-off filter L7, which is disposed between the second light reflection element F2 and the imaging surface IMG. The light emitted from the second light reflection element F2 passes through the infrared cut-off filter L7 and then is projected into the imaging surface IMG. The infrared cut-off filter L7 can be used to filter out infrared light to prevent the infrared light from reaching the imaging surface IMG of the periscope optical lens group, thereby preventing the infrared light from interfering with imaging and enabling the finally obtained image to have good color reducibility.

[0063] In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 can all be aspherical lenses. The aspherical lens can have a better radius of curvature, can maintain good aberration correction ability, and the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, and the sixth lens L6 are all made of plastic materials that are easy to be processed into aspherical lenses. The lenses made of glass materials can have good light transmittance, and the first light reflection element F1, the second light reflection element F2, and the infrared cut-off filter L7 can also all be made of glass materials.

[0064] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.5 < ETL4 / CTL4 < 2.5 (2), where ETL4 is the thickness of the edge of the effective clear aperture of the fourth lens L4 along the direction parallel to the optical axis; CTL4 is the thickness of the center of the fourth lens L4 on the optical axis.

[0065] Based on the above embodiments, by controlling the ratio of the two parameters of the thickness of the edge of the effective clear aperture of the fourth lens L4 along the direction parallel to the optical axis to the thickness of the center of the fourth lens L4 on the optical axis to satisfy the above conditional formula (2), the optical path difference of the periscope optical lens group can be effectively balanced, so that the central light and the marginal light passing through the fourth lens L4 can converge near the image plane of the fourth lens L4, realizing the function of correcting field curvature, ensuring imaging stability, and also ensuring the molding yield of the fourth lens L4. If ETL4 / CTL4 < 0.5, the center of the fourth lens L4 is too thick relative to the edge, resulting in too large field curvature on the image side of the fourth lens L4. If ETL3 / CTL3 > 2.5, the center of the fourth lens L4 is too thin, reducing the processing and molding yield of the fourth lens L4.

[0066] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.1mm -1 <FNO / EFL < 0.25mm -1 (3), where FNO is the f-number of the periscope optical lens group; EFL is the effective focal length of the periscope optical lens group.

[0067] Based on the above embodiments, in a periscope optical lens group, it is easy to have a small light transmission amount. Adjusting the aperture number of the periscope optical lens group can provide sufficient light transmission amount for the shooting of the periscope optical lens group. At the same time, after controlling the ratio of the aperture number of the periscope optical lens group to the effective focal length of the periscope optical lens group within a suitable range, the requirements for high-quality and high-definition shooting can also be met. In this embodiment, by controlling the ratio of the aperture number of the periscope optical lens group and the effective focal length of the periscope optical lens group to meet the above conditional formula (3), on the basis of meeting the requirements for improving the shooting image quality, the requirements for the miniaturized design of the periscope optical lens group can also be met. If FNO / EFL≥0.25mm -1 , it means that the aperture number of the periscope optical lens group is too large and does not match the effective focal length of the periscope optical lens group, resulting in an impact on the shooting effect of the periscope optical lens group. If FNO / EFL≤0.1mm -1 , it will cause insufficient light transmission amount of the periscope optical lens group, resulting in a decrease in the clarity of the captured image.

[0068] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.2mm -1 <FNO / Imgh<0.5mm -1 (4), where FNO is the aperture number of the periscope optical lens group; Imgh is the diagonal length of the effective photosensitive area on the imaging surface IMG of the periscope optical lens group.

[0069] Based on the above embodiments, on the basis of adjusting the aperture number of the periscope optical lens group to meet the requirement of increasing the light transmission amount, it is also necessary to reasonably match the diagonal length of the effective pixel area for photosensing on the imaging surface IMG of the periscope optical lens group to better meet the requirement of the clarity of the captured image. Therefore, by controlling the ratio of the aperture number of the periscope optical lens group to the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group to meet the above conditional formula (4), the effective pixel area for photosensing on the imaging surface IMG of the periscope optical lens group is large enough to receive all the light from the lens, and it can also enable the periscope optical lens group to obtain sufficient light transmission amount to meet the requirements of high-quality and high-definition shooting. If FNO / Imgh≥0.5mm -1 , it will cause the aperture of the periscope optical lens group to be too large and too much stray light in the edge field of view, resulting in a decrease in the imaging clarity of the outer field of view and the appearance of local blurring. If FNO / Imgh≤0.2mm -1 , it will cause insufficient light transmission amount of the periscope optical lens group, affecting the shooting effect.

[0070] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 4<F1 / EFL<15(5), where F1 is the focal length of the first lens L1, and EFL is the effective focal length of the periscope optical lens group.

[0071] Based on the above embodiments, a first lens L1 with a positive bending force is arranged in front of the first light reflection element F1, which can deflect the originally parallel vertically incident light toward the optical axis direction and then the light enters the first light reflection element F1 and the lens group at the rear end, increasing the light input amount of the periscope optical lens group. By controlling the ratio of the focal length of the first lens L1 to the effective focal length of the periscope optical lens group to satisfy the above conditional formula (5), it can ensure that the light from the object side converges better on the imaging surface IMG of the periscope optical lens group after passing through each lens, and can also ensure that the periscope optical lens group has a good light transmission amount. If F1 / EFL ≤ 4, the optical length of the periscope optical lens group is too short, resulting in increased sensitivity of the periscope optical lens group and being not conducive to the convergence of light within the imaging surface IMG. If F1 / EFL ≥ 15, it will cause the focal length of the first lens L1 to be too large, being not conducive to the first lens L1 collecting the light from the object side and resulting in a decrease in the light transmission amount.

[0072] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 1 < EFL / Imgh < 2.5 (6), where EFL is the effective focal length of the periscope optical lens group, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface IMG of the periscope optical lens group.

[0073] Based on the above embodiments, increasing the effective focal length EFL of the periscope optical lens group and increasing the diagonal length Imgh of the effective photosensitive area on the imaging surface IMG of the periscope optical lens group can meet the requirements of long focal length and large imaging surface shooting of the periscope optical lens group to obtain a higher resolution and clearer picture quality. Further, by controlling the ratio of the two parameters EFL and Imgh to satisfy the above conditional formula (6), on the basis of meeting the shooting requirements, it can also meet the miniaturization design requirements of the periscope optical lens group. If EFL / Imgh ≥ 2.5, it will cause the effective focal length of the periscope optical lens group to be too large, resulting in too long total length of the periscope optical lens group and being not conducive to the miniaturization design of the periscope optical lens group. If EFL / Imgh ≤ 1, the effective focal length of the periscope optical lens group is too short, making it inconvenient to adjust the position of the imaging surface IMG to make all the light converge on the imaging surface IMG.

[0074] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 13 mm < DL*FNO < 18 mm (7), where DL is the diameter size of the effective light transmission aperture of the diaphragm; FNO is the aperture number of the periscope optical lens group.

[0075] Based on the above embodiments, by controlling the ratio of the diameter DL of the effective light-passing aperture of the diaphragm and the f-number FNO of the periscope optical lens group to satisfy the above conditional formula (7), the ratio of the two parameters DL and FNO can be adjusted to an appropriate range to ensure that the periscope optical lens group has the best light-passing amount and image clarity. When DL*FNO < 13 mm, the effective light-passing aperture of the diaphragm is too small, resulting in too little light-passing amount, which is not conducive to the convergence of light on the imaging surface IMG of the periscope optical lens group and generates a large amount of stray light, resulting in a decline in shooting quality. When DL*FNO > 18 mm, the effective light-passing aperture of the diaphragm is too large, and the light rays at the edge are not reasonably intercepted, resulting in too large field curvature and causing the edge of the finally imaged picture to be distorted.

[0076] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 0.5 < DL / Imgh < 0.8 (8), where DL is the diameter of the effective light-passing aperture of the diaphragm, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface IMG of the periscope optical lens group.

[0077] Based on the above embodiments, the diameter DL of the effective light-passing aperture of the diaphragm determines the light-passing amount of the entire periscope optical lens group, and the diagonal length Imgh of the effective photosensitive area on the imaging surface IMG of the periscope optical lens group determines the image clarity and pixel size of the entire periscope optical lens group. By controlling the ratio of DL and the two parameters to satisfy the above conditional formula (8), it can be ensured that the periscope optical lens group has sufficient light-passing amount, and further ensure the clarity of the image obtained within the imaging surface IMG. If DL / Imgh > 0.8, the image within the imaging surface IMG is overexposed and the brightness is too high, affecting the picture quality. If DL / Imgh < 0.5, it will cause insufficient light-passing amount of the periscope optical lens group, resulting in insufficient brightness of the light projected onto the imaging surface IMG, which is not conducive to the photosensitive element installed within the imaging surface IMG to sense light.

[0078] In some exemplary embodiments, the periscope optical lens group satisfies the conditional formula: 5 mm 2 <(R5*R6) / (R5 / R6) < 110 mm 2 (9), where R5 is the curvature radius of the object side surface of the third lens L3, and R6 is the curvature radius of the image side surface of the third lens L3.

[0079] Based on the above embodiments, by controlling the two parameters of the curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 to satisfy the above conditional formula (9), R5 and R6 can be adjusted to an appropriate range to balance the optical path difference between the marginal rays and the paraxial rays of the periscope optical lens group, correct the field curvature and astigmatism, and at the same time reduce the system sensitivity and improve the assembly stability. If (R5*R6) / (R5 / R6) > 110 mm 2This will cause the periscope optical lens group to have too large a field curvature. If (R5*R6) / (R5 / R6)<5mm 2 This will increase the sensitivity of the periscope optical lens system and reduce the production and assembly yield.

[0080] An embodiment of the present application also provides a lens module, including a photosensitive element and the periscope optical lens group as described above, wherein the photosensitive element is arranged in an imaging surface IMG of the periscope optical lens group, wherein the periscope optical lens group is used to receive light reflected by the photographed object and project it to the photosensitive element, and the photosensitive element is used to convert the light into an image signal.

[0081] Based on the lens module provided in the embodiment of the present application, on the basis that the periscope optical lens group meets the requirements of high-definition shooting and miniaturized design, the lens module equipped with the periscope optical lens group as described above can also meet the requirements of high-definition shooting and miniaturized design, so that the lens module can be installed in a relatively narrow installation space, thereby improving the applicability of the lens module.

[0082] An embodiment of the present application also provides an electronic device, including a housing and the lens module as described above, wherein the lens module is installed in the housing.

[0083] Based on the electronic device provided in the embodiment of the present application, by installing the lens module as described above in the electronic device, the electronic device can also meet the high-definition shooting requirements, and the electronic device can also reduce the volume of the electronic device based on the lens module to meet the miniaturization design requirements of the electronic device.

[0084] The following will refer to the accompanying drawings and tables to introduce the assembly structure of the periscope optical lens assembly of the present technical solution in various specific implementations and the corresponding implementation results in combination with specific numerical values.

[0085] The meanings of the symbols shown in the examples are as follows.

[0086] S1, S6, S8, S10, S12, S14, and S19 are the numbers of the object-side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the infrared cut-off filter L7, respectively; S2, S7, S9, S11, S13, S15, and S20 are the numbers of the image-side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the infrared cut-off filter L7, respectively; S3, S4, and S5 are the numbers of the first incident surface, the first reflecting surface, and the first exiting surface of the first light reflecting element F1, respectively; and S16, S17, and S18 are the numbers of the second incident surface, the second reflecting surface, and the second exiting surface of the second light reflecting element F2, respectively.

[0087] “k” represents the conic constant, and “A4”, “A6”, “A8”, …, and “A20” represent the 4th-order, 6th-order, 8th-order, …, and 20th-order aspheric coefficients respectively.

[0088] In the following tables showing conic constants and aspheric coefficients, numerical values ​​are expressed using exponential expressions with a base of 10. For example, "0.12E-05" means "0.12×(10 to the negative fifth power)" and "9.87E+03" means "9.87×(10 to the third power)".

[0089] In the optical imaging lens used in each embodiment, specifically, if the distance in the direction perpendicular to the optical axis H is set to "r", the paraxial curvature at the lens origin is set to "c" (the paraxial curvature c is the reciprocal of the upper lens curvature radius R, that is, c = 1 / R), the cone constant is set to "k", and the 4th, 6th, 8th, ..., i-th order aspheric coefficients are set to "A4", "A6", "A8", ..., "Ai" respectively, then the aspheric shape x is defined by the following mathematical formula 1.

[0090] Mathematical formula 1:

[0091]

[0092] Embodiment 1

[0093] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Figure 1 As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2. The reflecting surface of the first light reflecting element F1 is parallel to the reflecting surface of the second light reflecting element F2.

[0094] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the first lens L1 are convex on the circumference.

[0095] The second lens L2 has positive refractive power. The object side surface and the image side surface of the second lens L2 are both convex surfaces at the near optical axis. The object side surface and the image side surface of the second lens L2 are both convex surfaces on the circumference.

[0096] The third lens L3 has negative refractive power. The object side surface of the third lens L3 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the third lens L3 is convex on the circumference, and the image side surface is concave on the circumference.

[0097] The fourth lens L4 has negative refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the fourth lens L4 is convex on the circumference, and the image side surface is concave on the circumference.

[0098] The fifth lens L5 has positive refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. The object side surface of the fifth lens L5 is concave at the circumference, and the image side surface is convex at the circumference.

[0099] The sixth lens L6 has positive refractive power. The object side surface of the sixth lens L6 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the sixth lens L6 is convex on the circumference, and the image side surface is concave on the circumference.

[0100] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 1 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 1. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field of view of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness and focal length are all millimeters.

[0101] Table 1

[0102]

[0103]

[0104] According to the parameters in Table 1, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 2.

[0105] Table 2

[0106] Conditional expression Numeric Conditional expression Numeric TL1 / TL2 1.12 EFL / Imgh 2.03 ETL4 / CTL4 1.19 DL*FNO 14.81mm FNO / EFL <![CDATA[0.17mm -1 ]]> DL / Imgh 0.64 FNO / Imgh <![CDATA[0.35mm -1 ]]> (R5*R6) / (R5 / R6) <![CDATA[9.72mm 2 ]]> F1 / EFL 4.85

[0107] According to the results in Table 2, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0108] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 1 are shown in Table 3.

[0109] Table 3

[0110]

[0111]

[0112] Figure 2From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the first embodiment.

[0113] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 2 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.10 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0114] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Figure 2 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.025 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0115] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Figure 2 The distortion curve given in the middle right figure shows that the distortion rate is within ±0.30% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0116] according to Figure 2 It can be seen that the periscope optical lens assembly provided in the first embodiment can achieve good imaging effects.

[0117] Embodiment 2

[0118] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Figure 3 As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2, and the reflecting surface of the first light reflecting element F1 is perpendicular to the reflecting surface of the second light reflecting element F2.

[0119] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the first lens L1 is concave at the circumference, and the image side surface is convex at the circumference.

[0120] The second lens L2 has positive refractive power, the object side surface of the second lens L2 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the second lens L2 are convex on the circumference.

[0121] The third lens L3 has negative refractive power. The object side surface of the third lens L3 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the third lens L3 is convex on the circumference, and the image side surface is concave on the circumference.

[0122] The fourth lens L4 has negative refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the fourth lens L4 is convex on the circumference, and the image side surface is concave on the circumference.

[0123] The fifth lens L5 has positive refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. The object side surface of the fifth lens L5 is concave at the circumference, and the image side surface is convex at the circumference.

[0124] The sixth lens L6 has negative refractive power, the object side surface of the sixth lens L6 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the sixth lens L6 are convex on the circumference.

[0125] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 2 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 4. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field of view of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness and focal length are all millimeters.

[0126] Table 4

[0127]

[0128] According to the parameters in Table 4, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 5.

[0129] Table 5

[0130] Conditional expression Numeric Conditional expression Numeric TL1 / TL2 1.16 EFL / Imgh 2.10 ETL4 / CTL4 1.26 DL*FNO 16.34mm FNO / EFL <![CDATA[0.17mm -1 ]]> DL / Imgh 0.71 FNO / Imgh <![CDATA[0.35mm -1 ]]> (R5*R6) / (R5 / R6) <![CDATA[11.26mm 2 ]]> F1 / EFL 4.67

[0131] According to the results in Table 5, the calculated results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0132] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 2 are shown in Table 6.

[0133] Table 6

[0134] Surface number k A4 A6 A8 A10 S1 0.000E+00 -9.248E-05 -2.741E-06 -9.784E-08 -1.691E-09 S2 0.000E+00 8.024E-05 2.345E-07 -9.178E-08 -5.004E-09 S6 -4.567E-01 1.072E-03 4.478E-05 2.319E-06 -3.657E-07 S7 -9.900E+01 1.670E-04 -1.265E-04 4.681E-06 -1.407E-07 S8 8.803E-01 -2.447E-03 3.668E-04 -4.847E-05 2.697E-06 S9 -4.077E-02 -6.898E-03 1.335E-03 -9.413E-05 1.535E-05 S10 -4.306E+00 -2.207E-03 1.678E-03 -3.967E-04 2.776E-05 S11 1.307E+00 4.727E-03 1.817E-03 -3.831E-04 1.455E-05 S12 5.747E-01 1.088E-02 -2.767E-03 6.679E-04 -1.061E-04 S13 -2.882E+00 -8.540E-04 -7.384E-04 1.778E-04 -2.340E-05 S14 -4.217E+01 -1.122E-02 1.935E-03 -9.195E-05 5.368E-06 S15 -1.823E+01 -8.866E-03 8.182E-04 -5.213E-05 2.414E-07 Surface number A12 A14 A16 A18 A20 S1 -1.151E-10 -5.059E-12 -2.560E-13 0.000E+00 0.000E+00 S2 -2.055E-10 -1.621E-11 1.090E-13 0.000E+00 0.000E+00 S6 2.309E-08 1.171E-09 -5.569E-10 0.000E+00 0.000E+00 S7 -1.211E-08 1.592E-09 -1.342E-10 0.000E+00 0.000E+00 S8 1.699E-08 7.310E-09 5.668E-11 0.000E+00 0.000E+00 S9 8.450E-07 -1.453E-07 9.602E-08 0.000E+00 0.000E+00 S10 7.047E-07 1.326E-07 -6.343E-08 0.000E+00 0.000E+00 S11 6.649E-06 -5.862E-07 -2.170E-07 0.000E+00 0.000E+00 S12 1.547E-05 -3.923E-07 -1.385E-07 0.000E+00 0.000E+00 S13 2.696E-06 1.518E-07 -5.031E-08 0.000E+00 0.000E+00 S14 -1.686E-07 -2.876E-08 3.195E-09 0.000E+00 0.000E+00 S15 5.580E-07 -4.518E-08 6.738E-11 0.000E+00 0.000E+00

[0135] Figure 4From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the second embodiment.

[0136] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 4 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.10 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0137] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Figure 4 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0138] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Figure 4 The distortion curve given in the middle right figure shows that the distortion rate is within ±0.15% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0139] according to Figure 4 It can be seen that the periscope optical lens assembly provided in the second embodiment can achieve good imaging effects.

[0140] Embodiment 3

[0141] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Figure 5 As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2. The reflecting surface of the first light reflecting element F1 is parallel to the reflecting surface of the second light reflecting element F2.

[0142] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the first lens L1 is convex at the circumference, and the image side surface is concave at the circumference.

[0143] The second lens L2 has positive refractive power. The object side surface and the image side surface of the second lens L2 are both convex surfaces at the near optical axis. The object side surface of the second lens L2 is convex on the circumference, and the image side surface is concave on the circumference.

[0144] The third lens L3 has negative refractive power. The object side surface of the third lens L3 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the third lens L3 is convex on the circumference, and the image side surface is concave on the circumference.

[0145] The fourth lens L4 has negative refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the fourth lens L4 are concave on the circumference.

[0146] The fifth lens L5 has negative refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. The object side surface of the fifth lens L5 is concave at the circumference, and the image side surface is convex at the circumference.

[0147] The sixth lens L6 has positive refractive power. The object side surface of the sixth lens L6 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the sixth lens L6 is convex on the circumference, and the image side surface is concave on the circumference.

[0148] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 3 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 7. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field of view of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness, and focal length are all millimeters.

[0149] Table 7

[0150]

[0151]

[0152] According to the parameters in Table 7, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 8.

[0153] Table 8

[0154] Conditional expression Numeric Conditional expression Numeric TL1 / TL2 1.07 EFL / Imgh 1.84 ETL4 / CTL4 1.73 DL*FNO 14.42mm FNO / EFL <![CDATA[0.19mm -1 ]]> DL / Imgh 0.62 FNO / Imgh <![CDATA[0.35mm -1 ]]> (R5*R6) / (R5 / R6) <![CDATA[31.56mm 2 ]]> F1 / EFL 10.00

[0155] According to the results in Table 8, the calculated results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0156] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 3 are shown in Table 9.

[0157] Table 9

[0158] Surface number k A4 A6 A8 A10 S1 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 -5.394E-01 9.552E-04 6.895E-06 5.105E-06 -5.664E-07 S7 -9.900E+01 5.002E-04 -4.053E-05 7.173E-06 -7.384E-07 S8 1.633E-01 -2.829E-03 1.581E-04 -3.870E-05 8.136E-06 S9 -2.265E-01 -6.615E-03 1.527E-03 -1.081E-04 -4.767E-06 S10 -2.261E+01 -1.477E-03 1.957E-03 -3.684E-04 1.405E-05 S11 2.559E-01 8.527E-04 8.138E-04 -2.891E-04 -4.595E-06 S12 -4.738E-02 1.322E-02 -3.288E-03 8.367E-04 -1.316E-04 S13 -1.601E+00 -1.626E-03 -5.014E-04 1.479E-04 -2.141E-05 S14 -5.791E-01 -1.106E-02 1.531E-03 -1.182E-04 7.576E-06 S15 -9.392E+00 -5.724E-03 4.418E-04 4.193E-06 -1.971E-06 Surface number A12 A14 A16 A18 A20 S1 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S7 3.820E-08 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S8 -3.318E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S9 3.931E-08 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S10 -3.831E-10 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S11 4.816E-06 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S12 1.044E-05 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S13 1.394E-06 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S14 -1.678E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S15 2.151E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0159] Figure 6 From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the third embodiment.

[0160] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 6 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.05 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0161] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Figure 6 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.025 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0162] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Figure 6 The distortion curve given in the middle right figure shows that the distortion rate is within ±2.00% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0163] according to Figure 6 It can be seen that the periscope optical lens assembly provided in the third embodiment can achieve good imaging effect.

[0164] Embodiment 4

[0165] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Figure 7 As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2, and the reflecting surface of the first light reflecting element F1 is perpendicular to the reflecting surface of the second light reflecting element F2.

[0166] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the first lens L1 is concave at the circumference, and the image side surface is convex at the circumference.

[0167] The second lens L2 has positive refractive power, the object side surface of the second lens L2 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the second lens L2 are convex on the circumference.

[0168] The third lens L3 has negative refractive power. The object side surface and the image side surface of the third lens L3 are both convex surfaces at the near optical axis. The object side surface of the third lens L3 is convex on the circumference, and the image side surface is concave on the circumference.

[0169] The fourth lens L4 has positive refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the fourth lens L4 is convex on the circumference, and the image side surface is concave on the circumference.

[0170] The fifth lens L5 has negative refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. The object side surface of the fifth lens L5 is concave at the circumference, and the image side surface is convex at the circumference.

[0171] The sixth lens L6 has negative refractive power. The object side surface of the sixth lens L6 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the sixth lens L6 is convex on the circumference, and the image side surface is concave on the circumference.

[0172] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 4 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 10. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field of view of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness and focal length are all millimeters.

[0173] Table 10

[0174]

[0175]

[0176] According to the parameters in Table 10, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 11.

[0177] Table 11

[0178] Conditional expression Numeric Conditional expression Numeric TL1 / TL2 1.08 EFL / Imgh 2.12 ETL4 / CTL4 0.74 DL*FNO 15.66mm FNO / EFL <![CDATA[0.17mm -1 ]]> DL / Imgh 0.68 FNO / Imgh <![CDATA[0.35mm -1 ]]> (R5*R6) / (R5 / R6) <![CDATA[7.40mm 2 ]]> F1 / EFL 4.64

[0179] According to the results in Table 11, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0180] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 4 are shown in Table 12.

[0181] Table 12

[0182]

[0183]

[0184] Figure 8 From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fourth embodiment.

[0185] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 8 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.05 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0186] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Figure 8 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.02 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0187] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Figure 8 The distortion curve given in the middle right figure shows that the distortion rate is within ±0.15% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0188] according to Figure 8 It can be seen that the periscope optical lens assembly provided in the fourth embodiment can achieve good imaging effects.

[0189] Embodiment 5

[0190] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Fig. 9 As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2. The reflecting surface of the first light reflecting element F1 is parallel to the reflecting surface of the second light reflecting element F2.

[0191] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the first lens L1 is convex at the circumference, and the image side surface is concave at the circumference.

[0192] The second lens L2 has positive refractive power. The object side surface and the image side surface of the second lens L2 are both convex surfaces near the optical axis. The object side surface of the second lens L2 is convex on the circumference, and the image side surface is concave on the circumference.

[0193] The third lens L3 has negative refractive power. The object side surface of the third lens L3 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the third lens L3 is convex on the circumference, and the image side surface is concave on the circumference.

[0194] The fourth lens L4 has negative refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the fourth lens L4 is convex on the circumference, and the image side surface is concave on the circumference.

[0195] The fifth lens L5 has positive refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. The object side surface of the fifth lens L5 is convex on the circumference, and the image side surface is concave on the circumference.

[0196] The sixth lens L6 has positive refractive power. The object side surface of the sixth lens L6 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the sixth lens L6 is convex on the circumference, and the image side surface is concave on the circumference.

[0197] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 5 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 13. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field of view of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness, and focal length are all millimeters.

[0198] Table 13

[0199]

[0200] According to the parameters in Table 13, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 14.

[0201] Table 14

[0202]

[0203]

[0204] According to the results in Table 14, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0205] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 5 are shown in Table 15.

[0206] Table 15

[0207] Surface number k A4 A6 A8 A10 S1 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 -8.654E-01 7.279E-04 -3.553E-05 1.441E-06 2.556E-07 S7 9.900E+01 7.749E-04 -4.923E-05 6.993E-06 -6.343E-07 S8 -4.173E-02 -3.025E-03 2.431E-04 -5.100E-05 3.505E-06 S9 1.890E-02 -6.819E-03 1.316E-03 -1.595E-04 -3.259E-06 S10 -8.662E-01 -4.405E-04 2.032E-03 -3.676E-04 1.983E-05 S11 -3.119E-01 8.744E-04 1.292E-03 -3.401E-04 -7.476E-06 S12 -2.847E-02 1.282E-02 -3.287E-03 7.763E-04 -1.192E-04 S13 -1.803E+00 -1.531E-03 -6.402E-04 1.447E-04 -1.838E-05 S14 -4.071E-02 -1.081E-02 1.634E-03 -1.135E-04 6.175E-06 S15 -8.131E+00 -5.616E-03 5.638E-04 -3.827E-06 -1.534E-06 Surface number A12 A14 A16 A18 A20 S1 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S7 5.354E-08 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S8 -1.981E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S9 9.000E-15 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S10 1.100E-14 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S11 4.823E-06 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S12 1.045E-05 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S13 1.591E-06 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S14 -1.061E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S15 2.313E-07 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0208] Fig.10 From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fifth embodiment.

[0209] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.10 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.25 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0210] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Fig.10 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.08 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0211] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Fig.10 The distortion curve given in the middle right figure shows that the distortion rate is within ±2.5% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0212] according to Fig.10 It can be seen that the periscope optical lens assembly provided in Example 5 can achieve good imaging effects.

[0213] Embodiment 6

[0214] The structural diagram of the periscope optical lens assembly in this embodiment is shown in FIG. Fig.11As shown, the periscope optical lens assembly includes a first lens L1, a first light reflecting element F1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a second light reflecting element F2 and an infrared cut-off filter L7 which are arranged in sequence from the object side to the image side. The aperture is arranged at the edge of the object side of the second lens L2, and the reflecting surface of the first light reflecting element F1 is perpendicular to the reflecting surface of the second light reflecting element F2.

[0215] The first lens L1 has positive refractive power, the object side surface of the first lens L1 is convex at the near optical axis, the image side surface is concave at the near optical axis, the object side surface of the first lens L1 is convex at the circumference, and the image side surface is concave at the circumference;

[0216] The second lens L2 has positive refractive power. The object side surface and the image side surface of the second lens L2 are both convex surfaces near the optical axis. The object side surface of the second lens L2 is convex on the circumference, and the image side surface is concave on the circumference.

[0217] The third lens L3 has positive refractive power, the object side surface of the third lens L3 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the third lens L3 are convex on the circumference.

[0218] The fourth lens L4 has negative refractive power, the object side surface of the fourth lens L4 is convex at the near optical axis, the image side surface is concave at the near optical axis, and both the object side surface and the image side surface of the fourth lens L4 are concave on the circumference.

[0219] The fifth lens L5 has negative refractive power. The object side surface of the fifth lens L5 is concave at the near optical axis, and the image side surface is convex at the near optical axis. Both the object side surface and the image side surface of the fifth lens L5 are convex on the circumference.

[0220] The sixth lens L6 has positive refractive power. The object side surface of the sixth lens L6 is convex at the near optical axis, and the image side surface is concave at the near optical axis. The object side surface of the sixth lens L6 is convex on the circumference, and the image side surface is concave on the circumference.

[0221] The refractive index, Abbe number and focal length of the periscope optical lens assembly in Example 6 are all based on light with a wavelength of 587.56 nm, and the relevant parameters of the periscope optical lens assembly are shown in Table 16. Among them, EFL is the effective focal length of the periscope optical lens assembly, FNO represents the aperture value, FOV represents the maximum field angle of the periscope optical lens assembly, TTL is the distance from the object side of the first lens L1 to the imaging surface IMG on the optical axis, and the units of the curvature radius, thickness, and focal length are all millimeters.

[0222] Table 16

[0223]

[0224]

[0225] According to the parameters in Table 16, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment are shown in Table 17.

[0226] Table 17

[0227] Conditional expression Numeric Conditional expression Numeric TL1 / TL2 1.03 EFL / Imgh 1.87 ETL4 / CTL4 2.08 DL*FNO 14.84mm FNO / EFL <![CDATA[0.19mm -1 ]]> DL / Imgh 0.64 FNO / Imgh <![CDATA[0.35mm -1 ]]> (R5*R6) / (R5 / R6) <![CDATA[102.84mm 2 ]]> F1 / EFL 9.56

[0228] According to the results in Table 17, the calculation results of the numerical relationship between the relevant parameters of each lens of the periscope optical lens assembly in this embodiment respectively satisfy the conditional expressions (1) to (9) in a one-to-one correspondence.

[0229] The cone constant K and aspheric coefficient corresponding to the surface of each lens in Example 6 are shown in Table 18.

[0230] Table 18

[0231]

[0232]

[0233] Fig.12 From left to right in the figure are the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the sixth embodiment.

[0234] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.12 When the wavelengths given in the left figure are 650.00nm, 620.00nm, 587.56nm, 470.00nm and 450.00nm respectively, the focus shifts of different fields of view are all within ±0.08 mm, indicating that the spherical aberration of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0235] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the image height, in millimeters. Fig.12 The astigmatism curve given in the middle figure shows that when the wavelength is 587.56nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05 mm, indicating that the astigmatism of the periscope optical lens assembly in this embodiment is small and the imaging quality is good.

[0236] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the image height, in millimeters. Fig.12 The distortion curve given in the middle right figure shows that the distortion rate is within ±0.15% when the wavelength is 587.56nm, indicating that the distortion of the periscope optical lens assembly in this embodiment has been well corrected and the imaging quality is good.

[0237] according to Fig.12 It can be seen that the periscope optical lens assembly provided in Example 6 can achieve good imaging effects.

[0238] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0239] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A periscope optical lens assembly, characterized in that: The periscope optical lens group has six lenses with refractive powers. The six lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side. The periscope optical lens group has a first light reflection element that deflects the optical path, and the first light reflection element is disposed between the first lens and the second lens; wherein: The first lens has a positive refractive power, and the object side surface of the first lens is convex near the optical axis, and the image side surface is concave near the optical axis; The second lens has a positive refractive power, and the object side surface of the second lens is convex near the optical axis; The third lens has a refractive power, and the object side surface of the third lens is convex near the optical axis; The fourth lens has a refractive power, and the object side surface of the fourth lens is convex near the optical axis, and the image side surface is concave near the optical axis; The fifth lens has a refractive power, and the object side surface of the fifth lens is concave near the optical axis, and the image side surface is convex near the optical axis; The sixth lens has a refractive power, and the object side surface of the sixth lens is convex near the optical axis, and the image side surface is concave near the optical axis; The first light reflection element has a first reflection surface, and the periscope optical lens group also satisfies the conditional formula: 1<TL1 / TL2<1.25, where TL1 is the sum of the distances from the first reflection surface of the first light reflection element to the object side surface of the first lens and the object side surface of the second lens along the optical axis direction, and TL2 is the distance from the object side surface of the second lens to the image side surface of the sixth lens along the optical axis direction.

2. The periscope optical lens assembly according to claim 1, characterized in that: The included angle between the first reflection surface and the optical axis of the first lens is 45 degrees. The periscope optical lens group also includes a second light reflection element that deflects the optical path. The second light reflection element is located on the image side of the sixth lens, and the second reflection surface of the first light reflection element is parallel or perpendicular to the first reflection surface of the second light reflection element.

3. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group satisfies the conditional formula: 0.5<ETL4 / CTL4<2.5, where ETL4 is the thickness of the edge of the effective clear aperture of the fourth lens along the direction parallel to the optical axis; CTL4 is the thickness of the center of the fourth lens on the optical axis.

4. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group meets the condition: 0.1 mm -1 <FNO / EFL<0.25 mm -1 , wherein FNO is the aperture number of the periscope optical lens assembly; EFL is the effective focal length of the periscope optical lens assembly.

5. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group meets the condition: 0.2mm -1 <FNO / Imgh<0.5 mm -1 , wherein FNO is the aperture number of the periscope optical lens group; Imgh is the diagonal length of the effective photosensing area on the imaging plane of the periscope optical lens group.

6. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group satisfies the conditional formula: 4<F1 / EFL<15, where F1 is the focal length of the first lens, and EFL is the effective focal length of the periscope optical lens group.

7. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group satisfies the conditional formula: 1.84<EFL / Imgh<2.5, where EFL is the effective focal length of the periscope optical lens group, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group.

8. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group also includes a diaphragm disposed on the object side surface of the second lens. The periscope optical lens group satisfies the conditional formula: 13mm<DL*FNO<18 mm, where DL is the diameter of the effective clear aperture of the diaphragm; FNO is the f-number of the periscope optical lens group.

9. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group further includes a diaphragm disposed on the object side surface of the second lens, and the periscope optical lens group satisfies the conditional formula: 0.5 < DL / Imgh < 0.8, where DL is the diameter of the effective light transmission aperture of the diaphragm, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface of the periscope optical lens group.

10. The periscope optical lens assembly according to claim 1, characterized in that: The periscope optical lens group meets the condition: 5 mm 2 <(R5*R6) / (R5 / R6)<110 mm 2 , wherein R5 is the curvature radius of the object side of the third lens, and R6 is the curvature radius of the image side of the third lens.

11. A lens module, characterized in that: Comprising: The periscope optical lens group according to any one of claims 1-10; and A photosensitive element disposed within the imaging surface of the periscope optical lens group; Wherein, the periscope optical lens group is configured to receive light reflected by an object to be photographed and project the light onto the photosensitive element, and the photosensitive element is configured to convert the light into an image signal.

12. An electronic device, characterized in that: Comprising: The lens module according to claim 11; And A housing, wherein the lens module is mounted within the housing.

Images