A middle-magnification integrated lens and an imaging device

Abstract

The present application relates to the field of optics, in particular to a middle magnification integrated lens, the middle magnification integrated lens is sequentially composed of a first fixed lens group with positive focal length, a first variable magnification lens group with negative focal length, a diaphragm, a second variable magnification lens group with positive focal length, a focusing lens group with negative focal length and a second fixed lens group with positive focal length from the object plane side to the image plane side; the middle magnification integrated lens satisfies the following conditional expressions: 10 < ft / fw < 15; fno < 4.8; wherein, ft is the focal length of the middle magnification integrated lens in a telephoto state, fw is the focal length of the middle magnification integrated lens in a wide-angle state, and fno is the aperture number of the middle magnification integrated lens. On the basis of realizing the middle magnification integrated lens, the brightness of the middle magnification integrated lens in the telephoto state can be greatly increased, and the experience of the user is improved; meanwhile, through the effect of three-group linkage, the volume of the middle magnification integrated lens is reduced, and the miniaturization of the middle magnification integrated lens is realized.

Description

Technical Field

[0001] This invention relates to the field of optics, specifically to a medium-magnification integrated lens and imaging device. Background Technology

[0002] An integrated lens is a highly integrated optical component designed for fields such as industrial monitoring and machine vision. It integrates the lens with components such as sensors to achieve compact and efficient imaging.

[0003] Currently, integrated lenses are mainly concentrated in the range of medium magnification zoom lenses. They usually need to take into account various factors such as the lens's imaging capabilities, chromatic aberration, distortion, and size. However, this also leads to a larger size for integrated lenses, resulting in an excessively long zoom range and consequently lower brightness. Summary of the Invention

[0004] This invention addresses existing technical problems by providing a medium-magnification integrated lens. In addition to achieving a medium-magnification integrated lens, it significantly increases the brightness of the lens in telephoto mode, enhancing the user experience. Furthermore, through the effect of three-group linkage, it reduces the size of the medium-magnification integrated lens, achieving miniaturization.

[0005] The technical solution provided by this invention is as follows: A medium-magnification integrated lens, wherein the medium-magnification integrated lens is composed of, from the object plane side to the image plane side, a first fixed lens group with positive optical power, a first zoom lens group with negative optical power, an aperture stop, a second zoom lens group with positive optical power, a focusing lens group with negative optical power, and a second fixed lens group with positive optical power. The first zoom lens group, the second zoom lens group, and the focusing lens group move along the main optical axis of the integrated medium magnification lens. The first fixed lens group consists of a first fixed lens with positive optical power, a second fixed lens with negative optical power, and a third fixed lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The focusing lens group consists of a first focusing lens with positive optical power and a second focusing lens with negative optical power, arranged sequentially from the object plane side to the image plane side, and the first focusing lens and the second focusing lens are cemented together. The second fixed lens group consists of a fourth fixed lens with positive optical power, a fifth fixed lens with negative optical power, and a sixth fixed lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The medium-magnification integrated lens satisfies the following condition: 10 < ft / fw < 15; fno < 4.8; Wherein, ft is the focal length of the integrated medium magnification lens in telephoto mode, fw is the focal length of the integrated medium magnification lens in wide-angle mode, and fno is the aperture number of the integrated medium magnification lens.

[0006] By limiting the structure and parameters described above, while realizing a medium-magnification integrated lens, the brightness of the medium-magnification integrated lens in telephoto mode can be greatly increased, enhancing the user experience; at the same time, through the effect of three-group linkage, the size of the medium-magnification integrated lens is reduced, realizing the miniaturization of the medium-magnification integrated lens.

[0007] Preferably, the first zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side.

[0008] Preferably, the second zoom lens group consists of a fifth zoom lens with positive optical power, a sixth zoom lens with negative optical power, a seventh zoom lens with positive optical power, a ninth zoom lens with negative optical power, and a tenth zoom lens with positive optical power, from the object plane side to the image plane side; wherein the sixth zoom lens and the seventh zoom lens are cemented together, and the ninth zoom lens and the tenth zoom lens are cemented together.

[0009] Preferably, the first zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side, with the second zoom lens and the third zoom lens cemented together.

[0010] Preferably, the second zoom lens group consists of a fifth zoom lens with positive optical power, a sixth zoom lens with negative optical power, a seventh zoom lens with positive optical power, an eighth zoom lens with negative optical power, a ninth lens with negative optical power, and a tenth lens with positive optical power, arranged sequentially from the object plane side to the image plane side; wherein the sixth zoom lens, the seventh zoom lens, and the eighth zoom lens form a cemented triplet lens, and the ninth zoom lens and the tenth zoom lens are cemented together.

[0011] Preferably, the first zoom lens group and the second zoom lens group each contain at least one aspherical lens.

[0012] In this technical solution, the use of aspherical lenses reduces the number of lenses used in a medium-magnification integrated lens, thereby achieving miniaturization of the medium-magnification integrated lens.

[0013] Preferably, the second fixed lens group includes an aspherical lens.

[0014] In this technical solution, by using aspherical lenses in the second fixed lens group, the miniaturization of the medium magnification integrated lens is achieved, and the light path emitted from the second fixed lens group is optimized, reducing the light dissipation between the second fixed lens group and the sensor, and increasing the brightness of the medium magnification integrated lens imaging.

[0015] Preferably, the integrated medium magnification lens satisfies the following condition: -3 < fG2 / fw < -1; 2 < fG3 / fw < 3; Wherein, fG2 is the focal length of the first zoom lens group, and fG3 is the focal length of the second zoom lens group.

[0016] In this technical solution, by limiting the focal length of the first zoom lens group and the second zoom lens group, the chromatic aberration and coma of the medium magnification integrated lens are reduced, thereby increasing the imaging quality of the medium magnification integrated lens.

[0017] Preferably, the integrated medium magnification lens satisfies the following condition: 2 < XG2 / fw < 6; 2 < XG3 / fw < 4; Wherein, XG2 is the maximum moving distance of the first zoom lens group, and XG3 is the maximum moving distance of the second zoom lens group.

[0018] In this technical solution, by limiting the maximum moving distance of the first zoom lens group and the second zoom lens group, the moving range of the first zoom lens group and the second zoom lens group is reduced while achieving zoom of the medium magnification integrated lens, thus realizing the miniaturization of the medium magnification integrated lens.

[0019] Preferably, the integrated medium magnification lens satisfies the following condition: 0.2 < XG4 / XG2 < 0.5; Wherein, XG4 is the maximum moving distance of the focusing lens group.

[0020] In this technical solution, by setting a focusing lens group with a smaller moving distance, the imaging quality of the medium magnification integrated lens is increased while achieving miniaturization.

[0021] One of the objectives of this invention is to provide an imaging apparatus, comprising: a medium-magnification integrated lens; and an imaging element configured to receive an image formed by the medium-magnification integrated lens.

[0022] Compared with the prior art, the integrated medium-magnification lens and imaging device provided by the present invention have the following beneficial effects: 1. While achieving a medium magnification integrated lens, it can also greatly increase the brightness of the medium magnification integrated lens in telephoto mode, enhancing the user experience; at the same time, through the effect of three-group linkage, the size of the medium magnification integrated lens is reduced, realizing the miniaturization of the medium magnification integrated lens.

[0023] 2. By using aspherical lenses in the second fixed lens group, the miniaturization of the medium-magnification integrated lens is achieved, and the light path emitted from the second fixed lens group is optimized, reducing the light dissipation between the second fixed lens group and the sensor, and increasing the brightness of the medium-magnification integrated lens image.

[0024] 3. By limiting the maximum moving distance of the first and second zoom lens groups, the moving range of the first and second zoom lens groups is reduced while achieving zoom in a medium-magnification integrated lens, thus realizing the miniaturization of the medium-magnification integrated lens. Attached Figure Description

[0025] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of a medium-magnification integrated lens and imaging device.

[0026] Figure 1 This is a schematic diagram of the structure of a medium magnification integrated lens according to the present invention; Figure 2 This is an aberration diagram of a medium-magnification integrated lens in wide-angle mode according to the present invention; Figure 3 This invention relates to a coma diagram of a medium-magnification integrated lens in a wide-angle state. Figure 4 This is an aberration diagram of a medium-magnification integrated lens in telephoto mode according to the present invention; Figure 5 This is a coma diagram of a medium-magnification integrated lens in telephoto mode according to the present invention; Figure 6 This is a schematic diagram of another integrated medium-magnification lens of the present invention; Figure 7 This is an aberration diagram of another medium-magnification integrated lens in the wide-angle state according to the present invention; Figure 8 This is another coma diagram of the wide-angle state of the integrated medium magnification lens of the present invention; Figure 9 This is another aberration diagram of the integrated medium-magnification lens in telephoto mode according to the present invention; Figure 10 This is another coma diagram of the medium-magnification integrated lens in the telephoto state of the present invention.

[0027] Explanation of reference numerals: G1, First fixed lens group; G2, First zoom lens group; G3, Second zoom lens group; G4, Focusing lens group; G5, Second fixed lens group; G6, Auxiliary component; a1, First fixed lens; a2, Second fixed lens; a3, Third fixed lens; a4, Fourth fixed lens; a5, Fifth fixed lens; a6, Sixth fixed lens; b1, First zoom lens; b2, Second zoom lens; b3, Third zoom lens; b4, Fourth zoom lens; b5, Fifth zoom lens; b6, Sixth zoom lens; b7, Seventh zoom lens; b8, Eighth zoom lens; b9, Ninth zoom lens; b10, Tenth zoom lens; c1, First focusing lens; c2, Second focusing lens; STO, Aperture stop; CG, Protective glass. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0030] Example 1 like Figure 1 and Figure 6 As shown, a medium-magnification integrated lens is composed of, from the object plane side to the image plane side, a first fixed lens group G1 with positive optical power, a first zoom lens group G2 with negative optical power, an aperture stop STO, a second zoom lens group G3 with positive optical power, a focusing lens group G4 with negative optical power, and a second fixed lens group G5 with positive optical power. The first zoom lens group G2, the second zoom lens group G3, and the focusing lens group G4 move along the main optical axis of the medium magnification integrated lens. The first fixed lens group G1 consists of a first fixed lens a1 with positive optical power, a second fixed lens a2 with negative optical power, and a third fixed lens a3 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The focusing lens group G4 consists of a first focusing lens c1 with positive optical power and a second focusing lens c2 with negative optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together. The second fixed lens group G5 consists of a fourth fixed lens a4 with positive optical power, a fifth fixed lens a5 with negative optical power, and a sixth fixed lens a6 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The medium-magnification integrated lens satisfies the following condition: 10 < ft / fw < 15; fno < 4.8; Wherein, ft is the focal length of the integrated medium magnification lens in telephoto mode, fw is the focal length of the integrated medium magnification lens in wide-angle mode, and fno is the aperture number of the integrated medium magnification lens.

[0031] In this embodiment, by limiting the structure and parameters described above, the brightness of the integrated medium magnification lens in telephoto mode can be greatly increased, thereby enhancing the user experience, while the size of the integrated medium magnification lens is reduced through the effect of three-group linkage, thus achieving miniaturization of the integrated medium magnification lens.

[0032] The first zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side.

[0033] The second zoom lens group G3 consists of a fifth zoom lens b5 with positive optical power, a sixth zoom lens b6 with negative optical power, a seventh zoom lens b7 with positive optical power, a ninth zoom lens b9 with negative optical power, and a tenth zoom lens b10 with positive optical power, from the object plane side to the image plane side; wherein, the sixth zoom lens b6 and the seventh zoom lens b7 are cemented together, and the ninth zoom lens b9 and the tenth zoom lens b10 are cemented together.

[0034] or The first zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens b2 and the third zoom lens b3 are cemented together.

[0035] The second zoom lens group G3 consists of, from the object plane side to the image plane side, a fifth zoom lens b5 with positive optical power, a sixth zoom lens b6 with negative optical power, a seventh zoom lens b7 with positive optical power, an eighth zoom lens b8 with negative optical power, a ninth lens with negative optical power, and a tenth lens with positive optical power; wherein, the sixth zoom lens b6, the seventh zoom lens b7, and the eighth zoom lens b8 form a cemented triplet lens, and the ninth zoom lens b9 and the tenth zoom lens b10 are cemented together.

[0036] The first zoom lens group G2 and the second zoom lens group G3 each contain at least one aspherical lens.

[0037] In this embodiment, the use of aspherical lenses reduces the number of lenses used in the medium magnification integrated lens, thereby achieving miniaturization of the medium magnification integrated lens.

[0038] The second fixed lens group G5 includes an aspherical lens.

[0039] By using an aspherical lens within the second fixed lens group G5, the miniaturization of the medium-magnification integrated lens is achieved, while also optimizing the light path emitted from the second fixed lens group G5, reducing light dissipation between the second fixed lens group G5 and the sensor, and increasing the brightness of the medium-magnification integrated lens image.

[0040] The medium-magnification integrated lens satisfies the following condition: -3 < fG2 / fw < -1; 2 < fG3 / fw < 3; Wherein, fG2 is the focal length of the first zoom lens group G2, and fG3 is the focal length of the second zoom lens group G3.

[0041] By limiting the focal length of the first zoom lens group G2 and the second zoom lens group G3, the chromatic aberration and coma of the medium-magnification integrated lens are reduced, thereby increasing the image quality of the medium-magnification integrated lens.

[0042] The medium-magnification integrated lens satisfies the following condition: 2 < XG2 / fw < 6; 2 < XG3 / fw < 4; Wherein, XG2 is the maximum moving distance of the first zoom lens group G2, and XG3 is the maximum moving distance of the second zoom lens group G3.

[0043] In this embodiment, by limiting the maximum moving distance of the first zoom lens group G2 and the second zoom lens group G3, the moving range of the first zoom lens group G2 and the second zoom lens group G3 is reduced while achieving zoom of the medium magnification integrated lens, thus realizing the miniaturization of the medium magnification integrated lens.

[0044] The medium-magnification integrated lens satisfies the following condition: 0.2 < XG4 / XG2 < 0.5; Wherein, XG4 is the maximum moving distance of the focusing lens group G4.

[0045] In this embodiment, by setting the focusing lens group G4 with a smaller moving distance, the imaging quality of the medium magnification integrated lens is increased while achieving miniaturization.

[0046] Example 2 like Figures 1 to 5 As shown, a medium-magnification integrated lens is composed of, from the object plane side to the image plane side, a first fixed lens group G1 with positive optical power, a first zoom lens group G2 with negative optical power, an aperture stop STO, a second zoom lens group G3 with positive optical power, a focusing lens group G4 with negative optical power, a second fixed lens group G5 with positive optical power, and an auxiliary component G6. The first zoom lens group G2, the second zoom lens group G3, and the focusing lens group G4 move along the main optical axis of the medium magnification integrated lens. The first fixed lens group G1 consists of a first fixed lens a1 with positive optical power, a second fixed lens a2 with negative optical power, and a third fixed lens a3 with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The first zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side.

[0047] The second zoom lens group G3 consists of a fifth zoom lens b5 with positive optical power, a sixth zoom lens b6 with negative optical power, a seventh zoom lens b7 with positive optical power, a ninth zoom lens b9 with negative optical power, and a tenth zoom lens b10 with positive optical power, from the object plane side to the image plane side; wherein, the sixth zoom lens b6 and the seventh zoom lens b7 are cemented together, and the ninth zoom lens b9 and the tenth zoom lens b10 are cemented together.

[0048] The focusing lens group G4 consists of a first focusing lens c1 with positive optical power and a second focusing lens c2 with negative optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together. The second fixed lens group G5 consists of a fourth fixed lens a4 with positive optical power, a fifth fixed lens with negative optical power, and a sixth fixed lens with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The auxiliary component G6 is a protective glass CG.

[0049] The basic lens data of the integrated medium magnification lens in this embodiment is shown in Table 1, the variable parameters in Table 1 are shown in Table 2, and the aspherical coefficients are shown in Table 3.

[0050] The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, where a positive radius of curvature indicates that the surface is curved towards the object side and a negative radius of curvature indicates that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens.

[0051] In Table 2, the WIDE column indicates the specific values ​​of each variable parameter when the medium magnification integrated lens is in the wide-angle end, and the TELE column indicates the specific values ​​of each variable parameter when the medium magnification integrated lens is in the telephoto end.

[0052] In Table 3, K is the conic coefficient, and e is the scientific notation, for example, e-05 represents 10. -5 .

[0053] Table 1 OBJ S1 spherical 68.81 9.54 1.50 81.59 S2 spherical 572.69 2.50 1.94 18.03 S3 spherical 269.87 0.10 S4 spherical 56.22 4.64 1.59 68.34 S5 spherical 100.64 D1 S6 spherical 51.51 1.10 2.00 29.13 S7 spherical 15.51 11.99 S8 aspherical -33.65 3.82 1.69 53.15 S9 aspherical 37.78 0.20 S10 spherical 36.36 6.18 1.85 23.79 S11 spherical -55.85 1.30 S12 spherical -33.43 1.10 1.50 81.61 S13 spherical -121.06 D2 STO spherical INF 0.10 S15 aspherical 20.18 4.72 1.69 53.15 S16 aspherical -74.11 3.50 S17 spherical 51.4 0.70 1.59 34.10 S18 spherical 11.8 5.11 1.44 94.58 S19 spherical -29.32 0.81 S20 spherical 22.45 1.32 1.82 31.23 S21 spherical 11.38 2.69 1.44 94.58 S22 spherical 37.62 D3 S23 spherical 489.93 1.51 1.95 17.94 S24 spherical -20.98 0.70 1.93 34.73 S25 spherical 12.81 D4 S26 spherical 18.10 2.25 1.92 31.94 S27 spherical 36.13 1.08 S28 spherical 283.29 0.70 1.95 17.98 S29 spherical 39.34 3.08 S30 aspherical 109.51 4.00 1.52 64.05 S31 aspherical -13.47 6.03 S32 spherical INF 2.00 1.52 64.20 S33 spherical INF 0.10 IMG Table 2 D1 0.75 43.21 D2 72.94 1.00 D3 1.54 13.09 D4 1.85 19.78 Table 3 S8 -3.77E+00 1.13E-05 -1.42E-07 6.30E-10 -1.00E-12 S9 4.20E+00 3.30E-06 -1.53E-07 3.83E-10 1.54E-13 S15 -2.01E+00 1.64E-05 4.25E-08 -5.95E-10 1.00E-11 S16 -3.21E+01 1.31E-05 5.71E-08 -7.52E-10 1.28E-11 S30 -5.00E+01 4.95E-08 1.27E-07 1.93E-08 -6.69E-10 S31 6.57E-01 2.05E-04 -5.73E-07 2.77E-08 -4.76E-10 In this embodiment, fw=8.2mm, ft=98.4mm, ft / fw=12, TTL=159.95mm; fno=2.2~4.69; Wherein, fno is the aperture number of the medium magnification integrated lens, ft is the focal length of the medium magnification integrated lens in telephoto mode, fw is the focal length of the medium magnification integrated lens in wide-angle mode, and TTL is the total optical length of the medium magnification integrated lens.

[0054] fG2=-17mm, fG5 / fw=-2.27; fG3=20.21mm, fG6 / fw=2.47; Wherein, fG2 is the focal length of the first zoom lens group G2, and fG3 is the focal length of the second zoom lens group G3.

[0055] XG2=42.46mm, XG4 / fw=5.18; XG4 represents the maximum moving distance of the second zoom lens group G3.

[0056] XG3=29.48mm, XG3 / XG4=3.6; XG4=17.93mm, XG6 / XG4=0.42; Wherein, XG2 is the maximum moving distance of the first zoom lens group G2, XG3 is the maximum moving distance of the second zoom lens group G3, and XG4 is the maximum moving distance of the focusing lens group G4.

[0057] Example 3 like Figures 6 to 10 As shown, a medium-magnification integrated lens is composed of, from the object plane side to the image plane side, a first fixed lens group G1 with positive optical power, a first zoom lens group G2 with negative optical power, an aperture stop STO, a second zoom lens group G3 with positive optical power, a focusing lens group G4 with negative optical power, a second fixed lens group G5 with positive optical power, and an auxiliary component G6. The first zoom lens group G2, the second zoom lens group G3, and the focusing lens group G4 move along the main optical axis of the medium magnification integrated lens. The first zoom lens group G2 consists of a first zoom lens b1 with negative optical power, a second zoom lens b2 with negative optical power, a third zoom lens b3 with positive optical power, and a fourth zoom lens b4 with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens b2 and the third zoom lens b3 are cemented together.

[0058] The second zoom lens group G3 consists of, from the object plane side to the image plane side, a fifth zoom lens b5 with positive optical power, a sixth zoom lens b6 with negative optical power, a seventh zoom lens b7 with positive optical power, an eighth zoom lens b8 with negative optical power, a ninth lens with negative optical power, and a tenth lens with positive optical power; wherein, the sixth zoom lens b6, the seventh zoom lens b7, and the eighth zoom lens b8 form a cemented triplet lens, and the ninth zoom lens b9 and the tenth zoom lens b10 are cemented together.

[0059] The focusing lens group G4 consists of a first focusing lens c1 with positive optical power and a second focusing lens c2 with negative optical power, arranged sequentially from the object plane side to the image plane side. The first focusing lens c1 and the second focusing lens c2 are cemented together. The second fixed lens group G5 consists of a fourth fixed lens a4 with positive optical power, a fifth fixed lens with negative optical power, and a sixth fixed lens with positive optical power, from the object plane side to the image plane side. The first fixed lens a1 and the second fixed lens a2 are cemented together. The auxiliary component G6 is a protective glass CG.

[0060] The basic lens data of the integrated medium magnification lens in this embodiment is shown in Table 4, the variable parameters in Table 4 are shown in Table 5, and the aspherical coefficients are shown in Table 6.

[0061] The surface number column shows the surface number when the object-side surface is set as surface 1 and the numbering is increased sequentially towards the image side; the surface type column shows the surface type of a lens; the radius of curvature column shows the radius of curvature of a lens, where a positive radius of curvature indicates that the surface is curved towards the object side and a negative radius of curvature indicates that the surface is curved towards the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to it on the image side; the refractive index column shows the refractive index of a lens; and the Abbe number column shows the Abbe number of a lens.

[0062] In Table 5, the WIDE column indicates the specific values ​​of each variable parameter when the medium magnification integrated lens is in wide-angle mode, and the TELE column indicates the specific values ​​of each variable parameter when the medium magnification integrated lens is in telephoto mode.

[0063] In Table 6, K is the conic coefficient, and e is the scientific notation, for example, e-05 represents 10. -5 .

[0064] Table 4 OBJ S1 spherical 66.36 9.64 1.50 81.59 S2 spherical 441.45 2.50 1.95 17.98 S3 spherical 230.33 0.10 S4 spherical 59.16 5.14 1.59 68.34 S5 spherical 126.03 D1 S6 spherical 63.15 1.10 2.00 29.13 S7 spherical 16.69 12.02 S8 aspherical -32.03 4.11 1.69 53.15 S9 spherical 34.14 6.43 1.85 23.79 S10 spherical -55.85 2.41 S11 spherical -35.92 1.15 1.50 78.26 S12 spherical -153.46 D2 STO spherical INF 0.10 S14 aspherical 19.77 4.94 1.69 53.15 S15 aspherical -75.05 3.09 S16 spherical 44.57 0.70 1.59 33.96 S17 spherical 11.4 5.27 1.44 94.58 S18 spherical -34.9 0.70 1.50 81.61 S19 spherical -35.66 0.32 S20 spherical 21.28 1.35 1.82 31.24 S21 spherical 11.35 2.75 1.44 94.58 S22 spherical 34.61 D3 S23 spherical 146.73 1.51 1.95 17.94 S24 spherical -23.01 0.77 1.94 33.85 S25 spherical 11.86 D4 S26 spherical 17.20 2.17 1.92 35.76 S27 spherical 28.98 0.91 S28 spherical 97.74 0.70 1.95 17.98 S29 spherical 36.14 2.01 S30 aspherical 98.34 4.00 1.52 64.05 S31 aspherical -12.93 5.81 S32 spherical INF 2.00 1.52 64.20 S33 spherical INF 0.10 IMG Table 5 D1 0.75 41.53 D2 69.93 1.00 D3 1.75 13.04 D4 3.07 19.93 Table 6 S8 -5.89E-02 5.61E-06 1.41E-08 -9.00E-11 -6.28E-14 S14 -1.97E+00 1.67E-05 4.03E-08 -6.12E-10 1.01E-11 S15 -2.66E+01 1.20E-05 4.77E-08 -7.95E-10 1.27E-11 S30 -3.81E+01 -3.94E-06 1.51E-07 1.98E-08 -6.58E-10 S31 6.19E-01 2.18E-04 -4.11E-07 2.85E-08 -4.82E-10 In this embodiment, fw=8.2mm, ft=98.41mm, ft / fw=12, TTL=159.3mm; fno=2.2~4.69; Wherein, fno is the aperture number of the medium magnification integrated lens, ft is the focal length of the medium magnification integrated lens in telephoto mode, fw is the focal length of the medium magnification integrated lens in wide-angle mode, and TTL is the total optical length of the medium magnification integrated lens.

[0065] fG2=-16.39mm, fG5 / fw=-2.00; fG3=20.05mm, fG6 / fw=2.45; Wherein, fG2 is the focal length of the first zoom lens group G2, and fG3 is the focal length of the second zoom lens group G3.

[0066] XG2=40.78mm, XG4 / fw=4.97; XG4 represents the maximum moving distance of the second zoom lens group G3.

[0067] XG3=28.15mm, XG3 / XG4=3.43; XG4=16.86mm, XG6 / XG4=0.41; Wherein, XG2 is the maximum moving distance of the first zoom lens group G2, XG3 is the maximum moving distance of the second zoom lens group G3, and XG4 is the maximum moving distance of the focusing lens group G4.

[0068] Example 4 An imaging device, such as Figures 1 to 10 As shown, it includes: a medium-magnification integrated lens as described in any of the above embodiments, and an imaging element configured to receive an image formed by the medium-magnification integrated lens.

[0069] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A medium-magnification integrated lens, characterized in that, The medium magnification integrated lens consists of, from the object plane side to the image plane side, a first fixed lens group with positive optical power, a first zoom lens group with negative optical power, an aperture stop, a second zoom lens group with positive optical power, a focusing lens group with negative optical power, and a second fixed lens group with positive optical power. The first zoom lens group, the second zoom lens group, and the focusing lens group move along the main optical axis of the integrated medium magnification lens. The first fixed lens group consists of a first fixed lens with positive optical power, a second fixed lens with negative optical power, and a third fixed lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The focusing lens group consists of a first focusing lens with positive optical power and a second focusing lens with negative optical power, arranged sequentially from the object plane side to the image plane side, and the first focusing lens and the second focusing lens are cemented together. The second fixed lens group consists of a fourth fixed lens with positive optical power, a fifth fixed lens with negative optical power, and a sixth fixed lens with positive optical power, arranged sequentially from the object plane side to the image plane side. The first fixed lens and the second fixed lens are cemented together. The medium-magnification integrated lens satisfies the following condition: 10 < ft / fw < 15; fno < 4.8; Wherein, ft is the focal length of the integrated medium magnification lens in telephoto mode, fw is the focal length of the integrated medium magnification lens in wide-angle mode, and fno is the aperture number of the integrated medium magnification lens.

2. The integrated medium magnification lens according to claim 1, characterized in that: The first zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side.

3. The integrated medium magnification lens according to claim 2, characterized in that: The second zoom lens group consists of a fifth zoom lens with positive optical power, a sixth zoom lens with negative optical power, a seventh zoom lens with positive optical power, a ninth zoom lens with negative optical power, and a tenth zoom lens with positive optical power, from the object plane side to the image plane side; wherein the sixth zoom lens and the seventh zoom lens are cemented together, and the ninth zoom lens and the tenth zoom lens are cemented together.

4. The integrated medium magnification lens according to claim 1, characterized in that: The first zoom lens group consists of a first zoom lens with negative optical power, a second zoom lens with negative optical power, a third zoom lens with positive optical power, and a fourth zoom lens with negative optical power, arranged sequentially from the object plane side to the image plane side. The second zoom lens and the third zoom lens are cemented together.

5. A medium-magnification integrated lens according to claim 4, characterized in that: The second zoom lens group consists of a fifth zoom lens with positive optical power, a sixth zoom lens with negative optical power, a seventh zoom lens with positive optical power, an eighth zoom lens with negative optical power, a ninth lens with negative optical power, and a tenth lens with positive optical power, from the object plane side to the image plane side; wherein, the sixth zoom lens, the seventh zoom lens, and the eighth zoom lens form a cemented triplet lens, and the ninth zoom lens and the tenth zoom lens are cemented together.

6. The integrated medium magnification lens according to claim 1, characterized in that: The first and second zoom lenses each contain at least one aspherical lens.

7. A medium-magnification integrated lens according to claim 1, characterized in that: The second fixed lens group includes an aspherical lens.

8. A medium-magnification integrated lens according to claim 1, characterized in that: The aperture stop moves along the main optical axis of the medium magnification integrated lens, following the movement of the second zoom lens.

9. A medium-magnification integrated lens according to claim 1, characterized in that: The medium-magnification integrated lens satisfies the following condition: -3 < fG2 / fw < -1; 2 < fG3 / fw < 3; Wherein, fG2 is the focal length of the first zoom lens group, and fG3 is the focal length of the second zoom lens group.

10. A medium magnification integrated lens according to claim 1, characterized in that: The medium-magnification integrated lens satisfies the following condition: 2 < XG2 / fw < 6; 2 < XG3 / fw < 4; Wherein, XG2 is the maximum moving distance of the first zoom lens group, and XG3 is the maximum moving distance of the second zoom lens group.

11. A medium-magnification integrated lens according to claim 10, characterized in that: The medium-magnification integrated lens satisfies the following condition: 0.2 < XG4 / XG2 < 0.5; Wherein, XG4 is the maximum moving distance of the focusing lens group.

12. An imaging device, characterized in that, include: The medium magnification integrated lens as described in any one of claims 1 to 11; And an imaging element, configured to receive an image formed by the medium magnification integrated lens.

Images