A three-element zoom lens

Abstract

The present invention relates to the field of lens technology. The present invention discloses a three-element zoom lens having ten lenses, wherein the first lens and the second lens constitute a fixed lens group, the third lens and the fourth lens constitute a variable-power lens group, the fifth lens to the tenth lens constitute a compensation lens group, the aperture is arranged between the variable-power lens group and the compensation lens group, and the refractive power and the surface shape of the first lens to the tenth lens are correspondingly limited, and the fifth lens and the sixth lens are aspherical lenses. The present invention has the advantages of a small number of lenses, low cost, short total system length, small volume, high resolution, large image surface, and good imaging quality.

Description

Technical Field

[0001] The invention belongs to the technical field of lenses, and in particular relates to a three-component zoom lens. Background Art

[0002] With the continuous advancement of science and technology and the continuous development of society, optical imaging lenses have also developed rapidly in recent years. Optical imaging lenses are widely used in various fields such as smart phones, tablet computers, video conferencing, vehicle monitoring, security monitoring, drone aerial photography, and intelligent transportation.

[0003] A zoom lens is a camera lens that can change its focal length within a certain range, thereby obtaining different widths of field angles, different sizes of images, and different ranges of scenery. A zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is very convenient to use and is being used more and more widely.

[0004] However, the zoom lenses currently on the market for security monitoring, drone aerial photography, intelligent transportation and other fields still have many shortcomings, such as too many lenses, which makes the overall cost of the lens too high, the total length of the optical system TTL is too long, and the overall volume is too large, which limits the installation and use; the imaging resolution is low; the imaging surface is small, the signal-to-noise ratio is high, and the photosensitivity is poor, etc., which can no longer meet the users' increasing requirements and need to be improved. Summary of the invention

[0005] The object of the present invention is to provide a three-component zoom lens to solve the above-mentioned technical problems.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a three-component zoom lens, which includes, from the object side to the image side, a first lens to a fourth lens, an aperture, and a fifth lens to a tenth lens in sequence along an optical axis; the first lens to the tenth lens each include an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through;

[0007] The first lens has a negative refractive power, the object side surface of the first lens is convex, and the image side surface is concave; the second lens has a positive refractive power, the object side surface of the second lens is convex, and the image side surface is convex, and the first lens and the second lens constitute a fixed lens group;

[0008] The third lens has a negative refractive power, and the object side surface of the third lens is concave, and the image side surface is concave; the fourth lens has a positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is concave, and the third lens and the fourth lens constitute a variable magnification lens group;

[0009] The fifth lens has a positive refractive power, and the object side surface of the fifth lens is convex, and the image side surface is convex; the sixth lens has a negative refractive power, and the object side surface of the sixth lens is convex, and the image side surface is concave; the seventh lens has a negative refractive power, and the object side surface of the seventh lens is convex, and the image side surface is concave; the eighth lens has a positive refractive power, and the object side surface of the eighth lens is convex, and the image side surface is convex; the ninth lens has a positive refractive power, and the object side surface of the ninth lens is concave, and the image side surface is convex; the tenth lens has a negative refractive power, and the object side surface of the tenth lens is concave, and the image side surface is convex, and the fifth lens to the tenth lens constitute a compensation lens group;

[0010] The object side surface and the image side surface of the fifth lens are both aspherical surfaces; the object side surface and the image side surface of the sixth lens are both aspherical surfaces;

[0011] The three-component zoom lens has only the first lens to the tenth lens having refractive power.

[0012] Furthermore, the object side surface and the image side surface of the fifth lens are both 16th-order even-order aspheric surfaces; and the object side surface and the image side surface of the sixth lens are both 16th-order even-order aspheric surfaces.

[0013] Furthermore, the fifth lens and the sixth lens are both made of glass material.

[0014] Furthermore, the first lens and the second lens are glued to each other.

[0015] Furthermore, the third lens and the fourth lens are glued to each other.

[0016] Furthermore, the seventh lens and the eighth lens are glued to each other.

[0017] Furthermore, the ninth lens and the tenth lens are glued to each other.

[0018] Furthermore, the dispersion coefficient of the first lens is smaller than the dispersion coefficient of the second lens; the dispersion coefficient of the fourth lens is smaller than the dispersion coefficient of the third lens; the dispersion coefficient of the seventh lens is smaller than the dispersion coefficient of the eighth lens; and the dispersion coefficient of the ninth lens is smaller than the dispersion coefficient of the tenth lens.

[0019] Further, the three-component zoom lens further satisfies: 1.60 < nd1 < 1.70, 50.00 < vd1 < 60.00, 1.40 < nd2 < 1.45, 90.00 < vd2 < 100.00, 1.75 < nd3 < 1.85, 45.00 < vd3 < 50.00, 1.90 < nd4 < 2.10, 20.00 < vd4 < 30.00, 1.70 < nd5 < 1.80, 45.00 < vd5 < 55.00, 1.80 < nd6 < 1.90, 40.00 < vd6 < 50.00, 2.00 < nd7 < 2.10, 25.00 < vd7 < 30.00, 1.60 < nd8 < 1.65, 55.00 < vd8 < 65.00, 1.95 < nd9 < 2.05, 17.00 < vd9 < 25.00, 1.70 < nd10 < 1.80, 50.00 < vd10 < 55.00, where nd1 - nd10 are the refractive indices of the first lens to the tenth lens respectively, and vd1 - vd10 are the dispersion coefficients of the first lens to the tenth lens respectively.

[0020] Further, the three-component zoom lens further satisfies: 3.0 < |f A / f B | < 4.0, 0.5 < |f C / f B | < 0.9, where f A is the focal length of the fixed lens group, f B is the focal length of the zoom lens group, and f C is the focal length of the compensating lens group.

[0021] Advantageous technical effects of the present invention:

[0022] The present invention has the advantages of fewer lenses, lower cost, shorter total optical system length, smaller overall volume, convenient installation and use; high resolution, good imaging quality; large imaging surface, better photosensitive performance, and low imaging signal-to-noise ratio. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention at the shortest focal length;

[0025] Figure 2 It is a schematic structural diagram of the first embodiment of the present invention at the middle focal length;

[0026] Figure 3 is a schematic diagram of the structure of the first embodiment of the present invention when it is at the longest focal length;

[0027] Figure 4 This is the MTF diagram of 0.470-0.650 μm at the shortest focal length of the first embodiment of the present invention;

[0028] Figure 5 This is the MTF diagram of 0.470-0.650 μm at a medium focal length according to the first embodiment of the present invention;

[0029] Figure 6 This is the MTF diagram of 0.470-0.650 μm at the longest focal length of the first embodiment of the present invention;

[0030] Figure 7 is a lateral chromatic aberration curve of 0.550 μm at the shortest focal length of Example 1 of the present invention;

[0031] Figure 8 is a lateral chromatic aberration curve of 0.550 μm at a medium focal length according to the first embodiment of the present invention;

[0032] Fig. 9 is a lateral chromatic aberration curve of 0.550 μm at the longest focal length of Example 1 of the present invention;

[0033] Fig.10 is a graph of field curvature and distortion curves at the shortest focal length according to the first embodiment of the present invention;

[0034] Fig.11 is a graph of field curvature and distortion curves at a medium focal length according to the first embodiment of the present invention;

[0035] Fig.12 is a graph of field curvature and distortion curves at the longest focal length according to the first embodiment of the present invention;

[0036] Fig.13 is a longitudinal chromatic aberration curve diagram of the first embodiment of the present invention at the shortest focal length;

[0037] Fig.14 is a longitudinal chromatic aberration curve diagram of the first embodiment of the present invention at a medium focal length;

[0038] Fig.15 is a longitudinal chromatic aberration curve diagram of the first embodiment of the present invention at the longest focal length;

[0039] Fig.16 is a schematic diagram of the structure of the second embodiment of the present invention when it is at the shortest focal length;

[0040] Fig.17It is a schematic diagram of the structure of the second embodiment of the present invention at a medium focal length;

[0041] Fig.18 is a schematic diagram of the structure of the second embodiment of the present invention at the longest focal length;

[0042] Fig.19 This is the MTF diagram of 0.470-0.650 μm at the shortest focal length of the second embodiment of the present invention;

[0043] Fig. 20 This is the MTF diagram of 0.470-0.650 μm at a medium focal length according to the second embodiment of the present invention;

[0044] Fig.21 This is the MTF diagram of 0.470-0.650 μm at the longest focal length of the second embodiment of the present invention;

[0045] Fig. 22 is a lateral chromatic aberration curve of 0.550 μm at the shortest focal length of Example 2 of the present invention;

[0046] Fig.23 is a lateral chromatic aberration curve of 0.550 μm at a medium focal length according to the second embodiment of the present invention;

[0047] Fig.24 This is a lateral chromatic aberration curve of 0.550 μm at the longest focal length of Example 2 of the present invention;

[0048] Fig.25 is a field curvature and distortion curve diagram of the second embodiment of the present invention at the shortest focal length;

[0049] Fig.26 is a graph of field curvature and distortion curves at a medium focal length according to the second embodiment of the present invention;

[0050] Fig. 27 is a field curvature and distortion curve diagram of the second embodiment of the present invention at the longest focal length;

[0051] Fig.28 is a longitudinal chromatic aberration curve diagram of the second embodiment of the present invention at the shortest focal length;

[0052] Fig.29 is a longitudinal chromatic aberration curve diagram of the second embodiment of the present invention at a medium focal length;

[0053] Fig.30 is a longitudinal chromatic aberration curve diagram of the second embodiment of the present invention at the longest focal length;

[0054] Fig.31 This is a schematic diagram of the structure of Embodiment 3 of the present invention when it is at the shortest focal length;

[0055] Fig.32 It is a schematic diagram of the structure of the third embodiment of the present invention at a medium focal length;

[0056] Fig.33 This is a schematic diagram of the structure of Embodiment 3 of the present invention when it is at the longest focal length;

[0057] Fig.34 This is the MTF diagram of 0.470-0.650 μm at the shortest focal length of the third embodiment of the present invention;

[0058] Fig.35 This is the MTF diagram of 0.470-0.650 μm at a medium focal length of the third embodiment of the present invention;

[0059] Fig.36 This is the MTF diagram of 0.470-0.650 μm at the longest focal length of the third embodiment of the present invention;

[0060] Fig.37 This is a lateral chromatic aberration curve of 0.550 μm at the shortest focal length of Example 3 of the present invention;

[0061] Fig.38 This is a lateral chromatic aberration curve of 0.550 μm at a medium focal length according to the third embodiment of the present invention;

[0062] Fig.39 This is a lateral chromatic aberration curve of 0.550 μm at the longest focal length of Example 3 of the present invention;

[0063] Fig.40 is a graph of field curvature and distortion curves at the shortest focal length according to the third embodiment of the present invention;

[0064] Fig.41 is a graph of field curvature and distortion curves of Embodiment 3 of the present invention at a medium focal length;

[0065] Fig.42 is a graph of field curvature and distortion curves at the longest focal length according to the third embodiment of the present invention;

[0066] Fig.43 is a longitudinal chromatic aberration curve diagram of Embodiment 3 of the present invention at the shortest focal length;

[0067] Fig.44 is a longitudinal chromatic aberration curve diagram of Embodiment 3 of the present invention at a medium focal length;

[0068] Fig.45 is a longitudinal chromatic aberration curve diagram of Embodiment 3 of the present invention at the longest focal length;

[0069] Fig.46 is a schematic diagram of the structure of the fourth embodiment of the present invention when it is at the shortest focal length;

[0070] Fig.47 It is a schematic diagram of the structure of the fourth embodiment of the present invention at a medium focal length;

[0071] Fig.48 is a schematic diagram of the structure of the fourth embodiment of the present invention when it is at the longest focal length;

[0072] Fig.49 This is the MTF diagram of 0.470-0.650 μm at the shortest focal length of the fourth embodiment of the present invention;

[0073] Fig.50 This is the MTF diagram of 0.470-0.650 μm at a medium focal length of the fourth embodiment of the present invention;

[0074] Fig.51 This is the MTF diagram of 0.470-0.650 μm at the longest focal length of the fourth embodiment of the present invention;

[0075] Fig.52 is a lateral chromatic aberration curve of 0.550 μm at the shortest focal length of Example 4 of the present invention;

[0076] Fig.53 is a lateral chromatic aberration curve of 0.550 μm at a medium focal length according to the fourth embodiment of the present invention;

[0077] Fig.54 This is a lateral chromatic aberration curve of 0.550 μm at the longest focal length of Example 4 of the present invention;

[0078] Fig.55 is a field curvature and distortion curve diagram of Embodiment 4 of the present invention at the shortest focal length;

[0079] Fig.56 is a graph of field curvature and distortion curves of Embodiment 4 of the present invention at a medium focal length;

[0080] Fig.57 is a graph of field curvature and distortion curves of Embodiment 4 of the present invention at the longest focal length;

[0081] Fig.58 is a longitudinal chromatic aberration curve diagram of Embodiment 4 of the present invention at the shortest focal length;

[0082] Fig.59 is a longitudinal chromatic aberration curve diagram of Embodiment 4 of the present invention at a medium focal length;

[0083] Fig.60 This is a longitudinal chromatic aberration curve diagram of Example 4 of the present invention at the longest focal length. DETAILED DESCRIPTION

[0084] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0085] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0086] The term "a lens having a positive refractive power (or a negative refractive power)" means that the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The term "object side (or image side) of the lens" is defined as a specific range of the lens surface through which the imaging light passes. The concave and convex shape of the lens can be determined by the judgment method of the general knowledgeable person in this field, that is, the concave and convex shape of the lens surface can be determined by the positive and negative signs of the radius of curvature (abbreviated as R value). R value can be commonly used in optical design software, such as Zemax or CodeV. R value is also commonly found in the lens data sheet of optical design software. For the object side, when the R value is positive, the object side is determined to be convex; when the R value is negative, the object side is determined to be concave. Conversely, for the image side, when the R value is positive, the image side is determined to be concave; when the R value is negative, the image side is determined to be convex.

[0087] The present invention provides a three-component zoom lens, which includes, from the object side to the image side, a first lens to a fourth lens, an aperture, and a fifth lens to a tenth lens in sequence along an optical axis; the first lens to the tenth lens each include an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through.

[0088] The first lens has a negative refractive power, the object side surface of the first lens is convex, and the image side surface is concave; the second lens has a positive refractive power, the object side surface of the second lens is convex, and the image side surface is convex, and the first lens and the second lens constitute a fixed lens group.

[0089] The third lens has a negative refractive power, and its object side surface is concave and its image side surface is concave; the fourth lens has a positive refractive power, and its object side surface is convex and its image side surface is concave. The third lens and the fourth lens constitute a variable magnification lens group.

[0090] The fifth lens has a positive refractive power, and the object side surface of the fifth lens is convex, and the image side surface is convex; the sixth lens has a negative refractive power, and the object side surface of the sixth lens is convex, and the image side surface is concave; the seventh lens has a negative refractive power, and the object side surface of the seventh lens is convex, and the image side surface is concave; the eighth lens has a positive refractive power, and the object side surface of the eighth lens is convex, and the image side surface is convex; the ninth lens has a positive refractive power, and the object side surface of the ninth lens is concave, and the image side surface is convex; the tenth lens has a negative refractive power, and the object side surface of the tenth lens is concave, and the image side surface is convex. The fifth lens to the tenth lens constitute a compensation lens group.

[0091] The object-side surface and the image-side surface of the fifth lens are both aspherical surfaces; the object-side surface and the image-side surface of the sixth lens are both aspherical surfaces.

[0092] The three-component zoom lens has only the first to tenth lenses with refractive powers. The present invention has the advantages of fewer lenses, lower cost, shorter total length of the optical system, smaller overall volume (maximum light clearance diameter <13.8 mm), easier installation and use, higher resolution, better imaging quality, larger imaging surface, better photosensitivity, and lower imaging signal-to-noise ratio.

[0093] Preferably, the object side surface and the image side surface of the fifth lens are both 16th-order even-order aspheric surfaces; the object side surface and the image side surface of the sixth lens are both 16th-order even-order aspheric surfaces, which are beneficial to correcting secondary spectrum and higher-order aberrations and improving imaging quality.

[0094] Preferably, the fifth lens and the sixth lens are both made of glass material to further improve the overall performance.

[0095] Preferably, the first lens and the second lens are glued to each other to further optimize chromatic aberration and shorten the overall length of the optical system.

[0096] More preferably, the third lens and the fourth lens are glued to each other to further optimize chromatic aberration and shorten the overall length of the optical system.

[0097] More preferably, the seventh lens and the eighth lens are glued to each other to further optimize chromatic aberration and shorten the overall length of the optical system.

[0098] More preferably, the ninth lens and the tenth lens are glued to each other to further optimize chromatic aberration and shorten the total length of the optical system.

[0099] More preferably, the dispersion coefficient of the first lens is smaller than that of the second lens; the dispersion coefficient of the fourth lens is smaller than that of the third lens; the dispersion coefficient of the seventh lens is smaller than that of the eighth lens; and the dispersion coefficient of the ninth lens is smaller than that of the tenth lens, which is beneficial to correcting chromatic aberration, and is also beneficial to the lens structure design and reducing the lens cost.

[0100] More preferably, the three-component zoom lens further satisfies: 1.60 < nd1 < 1.70, 50.00 < vd1 < 60.00, 1.40 < nd2 < 1.45, 90.00 < vd2 < 100.00, 1.75 < nd3 < 1.85, 45.00 < vd3 < 50.00, 1.90 < nd4 < 2.10, 20.00 < vd4 < 30.00, 1.70 < nd5 < 1.80, 45.00 < vd5 < 55.00, 1.80 < nd6 < 1.90, 40.00 < vd6 < 50.00, 2.00 < nd7 < 2.10, 25.00 < vd7 < 30.00, 1.60 < nd8 < 1.65, 55.00 < vd8 < 65.00, 1.95 < nd9 < 2.05, 17.00 < vd9 < 25.00, 1.70 < nd10 < 1.80, 50.00 < vd10 < 55.00, where nd1 - nd10 are the refractive indices of the first lens to the tenth lens respectively, and vd1 - vd10 are the dispersion coefficients of the first lens to the tenth lens respectively, further optimizing chromatic aberration and improving imaging quality.

[0101] Preferably, the three-component zoom lens further satisfies: 3.0 < |f A / f B | < 4.0, 0.5 < |f C / f B | < 0.9, where f A is the focal length of the fixed lens group, f B is the focal length of the variable magnification lens group, f C is the focal length of the compensating lens group, reasonably distributing the optical power and improving imaging quality.

[0102] The three-component zoom lens of the present invention will be described in detail below with specific embodiments.

[0103] Embodiment 1

[0104] As shown in Figure 1 and 2 and Figure 3, the present invention provides a three-component zoom lens, which sequentially includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a diaphragm 110, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 100, a filter 120, a protective glass 130, and an imaging surface 140 along an optical axis I from the object side A1 to the image side A2; each of the first lens 1 to the tenth lens 100 includes an object side surface facing the object side A1 and allowing imaging light to pass through and an image side surface facing the image side A2 and allowing imaging light to pass through.

[0105] The first lens 1 has a negative refractive power, the object side surface 11 of the first lens 1 is a convex surface, and the image side surface 12 is a concave surface; the second lens 2 has a positive refractive power, the object side surface 21 of the second lens 2 is a convex surface, and the image side surface 22 is a convex surface. The first lens 1 and the second lens 2 constitute a fixed lens group with positive refractive power, which is relatively fixed to the aperture 110 on the optical axis I, and the aperture 110 is relatively fixed to the imaging surface on the optical axis I.

[0106] The third lens 3 has a negative refractive power, the object side surface 31 of the third lens 3 is a concave surface, and the image side surface 32 is a concave surface; the fourth lens 4 has a positive refractive power, the object side surface 41 of the fourth lens 4 is a convex surface, and the image side surface 42 is a concave surface. The third lens 3 and the fourth lens 4 constitute a negative refractive power zoom lens group, which can be relatively moved on the optical axis I relative to the aperture 110.

[0107] The fifth lens element 5 has a positive refractive power, and an object-side surface 51 of the fifth lens element 5 is a convex surface, and an image-side surface 52 is a convex surface; the sixth lens element 6 has a negative refractive power, and an object-side surface 61 of the sixth lens element 6 is a convex surface, and an image-side surface 62 is a concave surface; the seventh lens element 7 has a negative refractive power, and an object-side surface 71 of the seventh lens element 7 is a convex surface, and an image-side surface 72 is a concave surface; the eighth lens element 8 has a positive refractive power, and an object-side surface 81 of the eighth lens element 8 is a convex surface, and an image-side surface 82 is a convex surface; the ninth lens element 9 has a positive refractive power, and an object-side surface 91 of the ninth lens element 9 is a concave surface, and an image-side surface 92 is a convex surface; the tenth lens element 100 has a negative refractive power, and an object-side surface 101 of the tenth lens element 100 is a concave surface, and an image-side surface 102 is a convex surface. The fifth lens element 5 to the tenth lens element 100 constitute a compensation lens group, which can move relative to the aperture 110 on the optical axis I.

[0108] During the zooming process, when changing from short focus to long focus, the fixed lens group does not move, the variable magnification lens group moves toward the image side A2, and the compensation lens group moves toward the object side A1, that is, the variable magnification lens group and the compensation lens group are close to each other. During the zooming process, the distance between the fixed lens group and the aperture 110 remains unchanged, and the distance between the aperture 110 and the imaging surface 140 remains unchanged.

[0109] The object-side surface 51 and the image-side surface 52 of the fifth lens 5 are both aspherical surfaces; the object-side surface 61 and the image-side surface 62 of the sixth lens 6 are both aspherical surfaces.

[0110] Preferably, in this embodiment, the fifth lens 5 and the sixth lens 6 are both made of glass, but not limited thereto.

[0111] Preferably, in this specific embodiment, the first lens 1 and the second lens 2 are glued to each other, the third lens 3 and the fourth lens 4 are glued to each other, the seventh lens 7 and the eighth lens 8 are glued to each other, and the ninth lens 9 and the tenth lens 10 are glued to each other, but it is not limited thereto.

[0112] The filter 120 can be selected according to actual needs, such as a filter for filtering out infrared light.

[0113] The detailed optical data of this specific embodiment at the shortest focal length are shown in Table 1-1.

[0114] Table 1-1 Detailed optical data of Example 1 at the shortest focal length

[0115]

[0116] The detailed optical data of this specific embodiment at medium focal length are shown in Table 1-2.

[0117] Table 1-2 Detailed optical data of Example 1 at medium focal length

[0118]

[0119]

[0120] The detailed optical data of this specific embodiment at the longest focal length are shown in Table 1-3.

[0121] Table 1-3 Detailed optical data of Example 1 at the longest focal length

[0122]

[0123]

[0124] In this specific embodiment, the object-side surfaces 51, 61 and the image-side surfaces 52, 62 are defined according to the following aspheric curve formula:

[0125]

[0126] in:

[0127] r is the distance from a point on the optical surface to the optical axis.

[0128] z is the vector height of the point along the optical axis.

[0129] c is the curvature of the surface.

[0130] K is the quadratic constant of the surface.

[0131] A4, A6, A8, A 10 , A 12 , A 14 , A 16 They are: fourth-order, sixth-order, eighth-order, tenth-order, twelfth-order, fourteenth-order, and sixteenth-order aspheric coefficients.

[0132] Please refer to the following table for detailed parameter data of each aspheric surface:

[0133]

[0134] Please refer to Table 5 for the numerical values ​​of the relevant conditional expressions of this specific embodiment.

[0135] For the MTF curve diagram of this specific embodiment, please refer to Figures 4 to 6 From the figure, we can see that the transmission function is well controlled, the resolution is high, and the full-field MTF values ​​of short, medium and long focal lengths at a spatial frequency of 180lp / mm are all greater than 0.2; for lateral chromatic aberration, please refer to Figure 7-9 , please refer to Longitudinal Chromatic Aberration Figure 13-15 , it can be seen that the chromatic aberration is well optimized, the chromatic aberration is less than ±3.5μm, and the field curvature and distortion diagram are shown in Figure 10-12 From (A) and (B), we can see that the field curvature and distortion are small, with the maximum distortion being about 8%.

[0136] In this specific embodiment, the focal length of the three-component zoom lens is f=11.6-43.0 mm; the field of view FOV=8.2° (at the longest focal length)-40.0° (at the shortest focal length); the relative aperture is 1 / 4.9∽1 / 2.85; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 140 on the optical axis I is 47.05 mm, and the image surface diameter Φ is 8.0 mm.

[0137] Embodiment 2

[0138] like Figure 16-18 As shown, the surface profile and refractive power of each lens in this embodiment are the same as those in the first embodiment, and only the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0139] The detailed optical data of this specific embodiment at the shortest focal length are shown in Table 2-1.

[0140] Table 2-1 Detailed optical data of Example 2 at the shortest focal length

[0141]

[0142]

[0143] The detailed optical data of this specific embodiment at medium focal length are shown in Table 2-2.

[0144] Table 2-2 Detailed optical data of Example 2 at medium focal length

[0145]

[0146]

[0147] The detailed optical data of this specific embodiment at the longest focal length are shown in Table 2-3.

[0148] Table 2-3 Detailed optical data of Example 2 at the longest focal length

[0149]

[0150] Please refer to the following table for detailed parameter data of each aspheric surface in this embodiment:

[0151]

[0152]

[0153] Please refer to Table 5 for the numerical values ​​of the relevant conditional expressions of this specific embodiment.

[0154] For the MTF curve diagram of this specific embodiment, please refer to Figures 19 to 21 From the figure, we can see that the transmission function is well controlled, the resolution is high, and the full-field MTF values ​​of short, medium and long focal lengths at a spatial frequency of 180lp / mm are all greater than 0.2; for lateral chromatic aberration, please refer to Figure 22-24 , please refer to Longitudinal Chromatic Aberration Figure 28-30 , it can be seen that the chromatic aberration is well optimized, the chromatic aberration is less than ±3.5μm, and the field curvature and distortion diagram are shown in Figure 25-27 From (A) and (B), we can see that the field curvature and distortion are small, with the maximum distortion being about 8%.

[0155] In this specific embodiment, the focal length of the three-component zoom lens is f=11.6-43.0 mm; the field of view FOV=8.2° (at the longest focal length)-40.0° (at the shortest focal length); the relative aperture is 1 / 4.9∽1 / 2.85; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 140 on the optical axis I is 47.15 mm, and the image surface diameter Φ is 8.0 mm.

[0156] Embodiment 3

[0157] like Figure 31-33 As shown, the surface profile and refractive power of each lens in this embodiment are the same as those in the first embodiment, and only the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0158] The detailed optical data of this specific embodiment at the shortest focal length are shown in Table 3-1.

[0159] Table 3-1 Detailed optical data of Example 3 at the shortest focal length

[0160]

[0161] The detailed optical data of this specific embodiment at medium focal length are shown in Table 3-2.

[0162] Table 3-2 Detailed optical data of Example 3 at medium focal length

[0163]

[0164] The detailed optical data of this specific embodiment at the longest focal length are shown in Table 3-3.

[0165] Table 3-3 Detailed optical data of Example 3 at the longest focal length

[0166]

[0167]

[0168] Please refer to the following table for detailed parameter data of each aspheric surface in this embodiment:

[0169]

[0170] Please refer to Table 5 for the numerical values ​​of the relevant conditional expressions of this specific embodiment.

[0171] For the MTF curve diagram of this specific embodiment, please refer to Figure 34 to Figure 36 From the figure, we can see that the transmission function is well controlled, the resolution is high, and the full-field MTF values ​​of short, medium and long focal lengths at a spatial frequency of 180lp / mm are all greater than 0.2; for lateral chromatic aberration, please refer to Figure 37-39 , please refer to Longitudinal Chromatic Aberration Figure 43-45 , it can be seen that the chromatic aberration is well optimized, the chromatic aberration is less than ±3.5μm, and the field curvature and distortion diagram are shown in Figure 40-42 From (A) and (B), we can see that the field curvature and distortion are small, with the maximum distortion being about 8%.

[0172] In this specific embodiment, the focal length of the three-component zoom lens is f=11.6-43.0 mm; the field of view FOV=8.2° (at the longest focal length)-40.0° (at the shortest focal length); the relative aperture is 1 / 4.9∽1 / 2.85; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 140 on the optical axis I is 47.18 mm, and the image surface diameter Φ is 8.0 mm.

[0173] Embodiment 4

[0174] like Figures 46-48 As shown, the surface profile and refractive power of each lens in this embodiment are the same as those in the first embodiment, and only the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0175] The detailed optical data of this specific embodiment at the shortest focal length are shown in Table 4-1.

[0176] Table 4-1 Detailed optical data of Example 4 at the shortest focal length

[0177]

[0178]

[0179] The detailed optical data of this specific embodiment at medium focal length are shown in Table 4-2.

[0180] Table 4-2 Detailed optical data of Example 4 at medium focal length

[0181]

[0182]

[0183] The detailed optical data of this specific embodiment at the longest focal length are shown in Table 4-3.

[0184] Table 4-3 Detailed optical data of the fourth embodiment at the longest focal length

[0185]

[0186] Please refer to the following table for detailed parameter data of each aspheric surface in this embodiment:

[0187]

[0188]

[0189] Please refer to Table 5 for the numerical values ​​of the relevant conditional expressions of this specific embodiment.

[0190] For the MTF curve diagram of this specific embodiment, please refer to Figures 49 to 51 From the figure, we can see that the transmission function is well controlled, the resolution is high, and the full-field MTF values ​​of short, medium and long focal lengths at a spatial frequency of 180lp / mm are all greater than 0.2; for lateral chromatic aberration, please refer to Figure 52-54 , please refer to Longitudinal Chromatic Aberration Figures 58-60 , it can be seen that the chromatic aberration is well optimized, the chromatic aberration is less than ±3.5μm, and the field curvature and distortion diagram are shown in Figure 55-57 From (A) and (B), we can see that the field curvature and distortion are small, with the maximum distortion being about 8%.

[0191] In this specific embodiment, the focal length of the three-component zoom lens is f=11.6-43.0 mm; the field of view FOV=8.2° (at the longest focal length)-40.0° (at the shortest focal length); the relative aperture is 1 / 4.9∽1 / 2.85; the distance TTL from the object side surface 11 of the first lens 1 to the imaging surface 140 on the optical axis I is 47.43 mm, and the image surface diameter Φ is 8.0 mm.

[0192] Table 5 Values ​​of important parameters of four embodiments of the present invention

[0193] First embodiment Second embodiment Third embodiment Fourth embodiment <![CDATA[f A ]]> 47.609 47.413 47.623 46.604 <![CDATA[f B ]]> -14.698 -14.673 -14.667 -14.735 <![CDATA[f C ]]> 11.305 11.343 11.319 11.658 <![CDATA[|f A / f B |]]> 3.239 3.231 3.247 3.163 <![CDATA[|f C / f B |]]> 0.769 0.773 0.772 0.791

[0194] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A three-component zoom lens, characterized in that: The lens system includes, from the object side to the image side, a first lens to a fourth lens, a stop, and a fifth lens to a tenth lens in sequence along an optical axis; the first lens to the tenth lens each include an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough; The first lens has a negative refractive power, the object side surface of the first lens is convex, and the image side surface is concave; the second lens has a positive refractive power, the object side surface of the second lens is convex, and the image side surface is convex, and the first lens and the second lens constitute a fixed lens group; The third lens has a negative refractive power, and the object side surface of the third lens is concave, and the image side surface is concave; the fourth lens has a positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is concave, and the third lens and the fourth lens constitute a variable magnification lens group; The fifth lens has a positive refractive power, and the object side surface of the fifth lens is convex, and the image side surface is convex; the sixth lens has a negative refractive power, and the object side surface of the sixth lens is convex, and the image side surface is concave; the seventh lens has a negative refractive power, and the object side surface of the seventh lens is convex, and the image side surface is concave; the eighth lens has a positive refractive power, and the object side surface of the eighth lens is convex, and the image side surface is convex; the ninth lens has a positive refractive power, and the object side surface of the ninth lens is concave, and the image side surface is convex; the tenth lens has a negative refractive power, and the object side surface of the tenth lens is concave, and the image side surface is convex, and the fifth lens to the tenth lens constitute a compensation lens group; The object side surface and the image side surface of the fifth lens are both aspherical surfaces; the object side surface and the image side surface of the sixth lens are both aspherical surfaces; The three-component zoom lens has only the first lens to the tenth lens having refractive power.

2. The three-component zoom lens according to claim 1, characterized in that: The object side surface and the image side surface of the fifth lens are both 16th-order even-order aspheric surfaces; the object side surface and the image side surface of the sixth lens are both 16th-order even-order aspheric surfaces.

3. The three-component zoom lens according to claim 1, wherein: The fifth lens and the sixth lens are both made of glass material.

4. The three-component zoom lens according to claim 1, wherein: The first lens and the second lens are cemented to each other.

5. The three-component zoom lens according to claim 4, characterized in that: The third lens and the fourth lens are cemented to each other.

6. The three-component zoom lens according to claim 5, characterized in that: The seventh lens and the eighth lens are cemented to each other.

7. The three-component zoom lens according to claim 6, characterized in that: The ninth lens and the tenth lens are cemented to each other.

8. The three-component zoom lens according to claim 7, characterized in that: The dispersion coefficient of the first lens is smaller than the dispersion coefficient of the second lens; the dispersion coefficient of the fourth lens is smaller than the dispersion coefficient of the third lens; the dispersion coefficient of the seventh lens is smaller than the dispersion coefficient of the eighth lens; and the dispersion coefficient of the ninth lens is smaller than the dispersion coefficient of the tenth lens.

9. The three-component zoom lens according to claim 8, characterized in that: The triple-group zoom lens further satisfies: 1.60 < nd1 < 1.70, 50.00 < vd1 < 60.00, 1.40 < nd2 < 1.45, 90.00 < vd2 < 100.00, 1.75 < nd3 < 1.85, 45.00 < vd3 < 50.00, 1.90 < nd4 < 2.10, 20.00 < vd4 < 30.00, 1.70 < nd5 < 1.80, 45.00 < vd5 < 55.00, 1.80 < nd6 < 1.90, 40.00 < vd6 < 50.00, 2.00 < nd7 < 2.10, 25.00 < vd7 < 30.00, 1.60 < nd8 < 1.65, 55.00 < vd8 < 65.00, 1.95 < nd9 < 2.05, 17.00 < vd9 < 25.00, 1.70 < nd10 < 1.80, 50.00 < vd10 < 55.00, where nd1 - nd10 are the refractive indices of the first lens to the tenth lens respectively, and vd1 - vd10 are the dispersion coefficients of the first lens to the tenth lens respectively.

10. The three-component zoom lens according to claim 1, wherein: The three-element zoom lens meets the following requirements: 3.0<|f A / f B |<4.0, 0.5<|f C / f B |<0.9, where f A is the focal length of the fixed lens group, f B is the focal length of the zoom lens group, f C To compensate for the focal length of the lens group.

Images