CN211826695U

CN211826695U - High-resolution zoom lens

Info

Publication number: CN211826695U
Application number: CN202020642943.5U
Authority: CN
Inventors: 上官秋和; 刘青天; 李雪慧
Original assignee: Xiamen Leading Optics Co Ltd
Current assignee: Xiamen Leading Optics Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-10-30
Anticipated expiration: 2030-04-24

Abstract

The utility model relates to a camera lens technical field. The utility model discloses a zoom of high resolution has eleven lens, first lens constitutes focusing lens group to third lens, fourth lens constitutes the zoom lens group to eleventh lens, the diaphragm setting is between focusing lens group and zoom lens group, and carry out corresponding injecing to the refractive index and the face type of first lens to eleventh lens, and fourth lens adopts aspherical lens, this zoom has 3 group's cemented lens at least, cemented lens constitutes by two lens each other's of first lens to eleventh lens. The utility model has the advantages of large light transmission; high resolution; a large image plane; the day and night confocality is good; the advantages of small size and portability.

Description

High-resolution zoom lens

Technical Field

The utility model belongs to the technical field of the camera lens, specifically relate to a high resolution's zoom lens.

Background

With the continuous progress of science and technology and the continuous development of society, in recent years, the optical imaging lens has also been rapidly developed, and the optical imaging lens is widely applied to various fields such as smart phones, tablet computers, video conferences, vehicle-mounted monitoring, security monitoring, unmanned aerial vehicle aerial photography and the like.

The zoom lens is a camera lens which can change focal length in a certain range, thereby obtaining different field angles, images with different sizes and different scene ranges. The zoom lens can change a photographing range by varying a focal length without changing a photographing distance, and thus is very convenient to use and is increasingly widely used.

However, the zoom lens for security monitoring in the current market has many defects, such as small light transmission, general FNO value of 1.6-2.8, and incapability of meeting low-light requirement, and especially in a low-light environment, a monitoring picture is dark, and video noise is more; if large light transmission is required, the resolution is difficult to improve, the image quality is poor, and high-definition image quality is difficult to realize simultaneously by different focal length sections; the image surface is small, and the sensor with large image surface and high pixels cannot be adapted; the size is large, the lens is large in size and heavy, the requirements of users which are increasing cannot be met, and the improvement is needed.

Disclosure of Invention

An object of the utility model is to provide a high resolution's zoom is used for solving the technical problem that the aforesaid exists.

In order to achieve the above object, the utility model adopts the following technical scheme: a high-resolution zoom lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a tenth lens, a ninth lens, a tenth lens, a eleventh lens and a seventh lens from an object side to an image side along an optical axis; the first lens element to the eleventh lens element each include an object-side surface facing the object side and passing the imaging light, and an image-side surface facing the image side and passing the imaging light;

the first lens element with negative refractive index has a concave image-side surface; the second lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the third lens element has positive refractive index, and the object-side surface of the third lens element is convex; the first lens to the third lens form a focusing lens group;

the fourth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the sixth lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the seventh lens element with negative refractive index has a concave image-side surface; the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the ninth lens element with negative refractive index has a concave object-side surface and a convex image-side surface; the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the eleventh lens element with negative refractive power has a concave object-side surface and a concave image-side surface; the fourth lens to the eleventh lens form a variable power lens group;

the object side surface and the image side surface of the fourth lens are both aspheric surfaces, the zoom lens is provided with at least 3 groups of cemented lenses, each cemented lens is formed by mutually cementing two lenses from the first lens to the eleventh lens, and the zoom lens only comprises the first lens to the eleventh lens.

Further, the zoom lens further satisfies: 0.8 < | F1/F2 | < 1.2, wherein F1 is the focal length of the focusing lens assembly, and F2 is the focal length of the zooming lens assembly.

Further, the zoom lens further satisfies: 0.8 < | f2/f3 | < 1.2, f2 is the focal length of the second lens element, and f3 is the focal length of the third lens element.

Further, the zoom lens further satisfies: 0.8 < | f6/f10 | < 1.2, wherein f6 is the focal length of the sixth lens element, and f10 is the focal length of the tenth lens element.

Further, the zoom lens further satisfies: nd1 > 1.8, where nd1 is the refractive index of the first lens.

Further, the second lens and the third lens are cemented with each other, the fifth lens and the sixth lens are cemented with each other, the eighth lens and the ninth lens are cemented with each other, and the tenth lens and the eleventh lens are cemented with each other.

Furthermore, the zoom lens further satisfies: | vd5-vd6 | 30, where vd5 is the Abbe number of the fifth lens and vd6 is the Abbe number of the sixth lens.

Further, the zoom lens further satisfies: | vd10-vd11 | 30, where vd10 is the Abbe number of the tenth lens and vd11 is the Abbe number of the eleventh lens.

Further, the first lens to the eleventh lens are made of glass materials.

The utility model has the advantages of:

the utility model has the advantages of large light transmission, great improvement of the light entering amount of the lens, good low-light effect and more bright and clean picture; the transfer function is well controlled, high in resolution and high in resolution; the optical system has good manufacturability and low sensitivity, so that the actual finished product is closer to the design; the image surface is large and can support the image height of 9.5 mm; the focal length section has large span and flexible switching of far and near monitoring; the dual-purpose of day and night can be realized, and the infrared confocal property is good; the monitoring camera has the advantages of being small and exquisite, light in weight and capable of greatly reducing the occupied space of the monitoring camera.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a first embodiment of the present invention at a shortest focal length;

fig. 2 is a schematic structural view of the first embodiment of the present invention at the longest focal length;

fig. 3 is a graph of MTF of 0.435-0.656 μm at the shortest focal length according to the first embodiment of the present invention;

fig. 4 is a graph of MTF of 0.435-0.656 μm at the intermediate focal length according to the first embodiment of the present invention;

fig. 5 is a graph of MTF of 0.435-0.656 μm at the longest focal length according to the first embodiment of the present invention;

FIG. 6 is a defocus plot of 0.440-0.656 μm at 60lp/mm in visible light according to the first embodiment of the present invention;

FIG. 7 is a defocus graph of 60lp/mm at 0.850 μm in the first embodiment of the present invention;

fig. 8 is a MTF graph of 0.435-0.656 μm at the shortest focal length according to embodiment two of the present invention;

fig. 9 is a MTF graph of 0.435-0.656 μm at the intermediate focal length according to embodiment two of the present invention;

fig. 10 is a graph of MTF of 0.435-0.656 μm at the longest focal length according to embodiment two of the present invention;

FIG. 11 is a defocus plot of 60lp/mm visible light of 0.440-0.656 μm in accordance with the second embodiment of the present invention;

FIG. 12 is a defocus graph of 60lp/mm at 0.850 μm in the infrared of the second embodiment of the present invention;

fig. 13 is a MTF graph of 0.435-0.656 μm at the shortest focal length according to the third embodiment of the present invention;

fig. 14 is a graph of MTF of 0.435-0.656 μm at the intermediate focal length according to the third embodiment of the present invention;

fig. 15 is a graph of MTF of 0.435-0.656 μm at the longest focal length according to the third embodiment of the present invention;

FIG. 16 is a defocus plot of 60lp/mm visible light of 0.440-0.656 μm in the third embodiment of the present invention;

FIG. 17 is a defocus graph of 60lp/mm at 0.850 μm in the infrared of the third embodiment of the present invention;

fig. 18 is a graph of MTF of 0.435-0.656 μm at the shortest focal length according to embodiment four of the present invention;

fig. 19 is a graph of MTF of 0.435-0.656 μm at the intermediate focal length according to embodiment four of the present invention;

fig. 20 is a graph of MTF of 0.435-0.656 μm at the longest focal length according to embodiment four of the present invention;

FIG. 21 is a defocus plot of 60lp/mm visible light of 0.440-0.656 μm in accordance with the fourth embodiment of the present invention;

fig. 22 is a defocus graph of 60lp/mm at infrared 0.850 μm according to the fourth embodiment of the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

The term "a lens element having positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens element calculated by Gaussian optics theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.

The utility model provides a high-resolution zoom lens, which comprises a first lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a; the first lens element to the eleventh lens element each include an object-side surface facing the object side and passing the image light, and an image-side surface facing the image side and passing the image light.

The first lens element with negative refractive index has a concave image-side surface; the second lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the third lens element has positive refractive index, and the object-side surface of the third lens element is convex; the first lens to the third lens form a focusing lens group which can move relatively relative to the diaphragm on the optical axis to play a role in refocusing.

The fourth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface; the sixth lens element with negative refractive index has a concave object-side surface and a concave image-side surface; the seventh lens element with negative refractive index has a concave image-side surface; the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the ninth lens element with negative refractive index has a concave object-side surface and a convex image-side surface; the tenth lens element with positive refractive power has a convex object-side surface and a convex image-side surface; the eleventh lens element with negative refractive power has a concave object-side surface and a concave image-side surface; the fourth lens to the eleventh lens constitute a variable power lens group which is movable relative to the stop on the optical axis and performs a function of changing focal length and power.

The object side surface and the image side surface of the fourth lens are both aspheric surfaces, the image quality is optimized, the aberration is corrected, the total length of the optical system is controlled, the zoom lens is provided with at least 3 groups of cemented lenses, the cemented lenses are formed by mutually cementing two lenses from the first lens to the eleventh lens, the total length of the optical system can be effectively controlled while the chromatic aberration is optimized, the miniaturization is realized, and the lenses with the refractive index of the zoom lens are only the first lens to the eleventh lens.

Preferably, the zoom lens further satisfies: 0.8 < | F1/F2 | < 1.2, wherein F1 is the focal length of the focusing lens group, and F2 is the focal length of the zoom lens group, so that the system can obtain a better performance, namely, a large image plane and high image quality.

Preferably, the zoom lens further satisfies: 0.8 < | f2/f3 | < 1.2, f2 is the focal length of the second lens, f3 is the focal length of the third lens, balance the focal power, reduce the low sensitivity, obtain the high resolution.

Preferably, the zoom lens further satisfies: 0.8 < | f6/f10 | < 1.2, wherein f6 is the focal length of the sixth lens element, f10 is the focal length of the tenth lens element, and the reasonable focal lengths are matched, so that large light transmission is further realized, and high image quality is kept.

Preferably, the zoom lens further satisfies: nd1 is more than 1.8, wherein nd1 is the refractive index of the first lens, which is beneficial to reducing the outer diameter of the lens and realizing the miniaturization of the system.

Preferably, the second lens and the third lens are mutually cemented, the fifth lens and the sixth lens are mutually cemented, the eighth lens and the ninth lens are mutually cemented, and the tenth lens and the eleventh lens are mutually cemented, so that the total length of the optical system can be effectively controlled while further optimizing chromatic aberration, and miniaturization is realized.

More preferably, the zoom lens further satisfies: | vd5-vd6 | > 30, wherein vd5 is the abbe number of the fifth lens, vd6 is the abbe number of the sixth lens, and high-low dispersion materials are combined to further correct chromatic aberration and optimize day and night confocality.

Preferably, the zoom lens further satisfies: | vd10-vd11 | > 30, wherein vd10 is the abbe number of the tenth lens, vd11 is the abbe number of the eleventh lens, and high-low dispersion materials are combined to further correct chromatic aberration and optimize day and night confocality.

Preferably, the first lens to the eleventh lens are made of glass materials, and the optical performance of the zoom lens is further improved.

The high-resolution zoom lens of the present invention will be described in detail with specific embodiments.

Example one

As shown in fig. 1 and 2, the present invention provides a high resolution zoom lens, which includes, in order along an optical axis I, a first lens 1, a second lens 2, a third lens 3, a stop 120, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 100, an eleventh lens 110, a protective glass 130, and an image plane 140 from an object side a1 to an image side a 2; the first lens element 1 to the eleventh lens element 110 each include an object-side surface facing the object side a1 and passing the image light, and an image-side surface facing the image side a2 and passing the image light.

The first lens element 1 has a negative refractive index, the object-side surface 11 of the first lens element 1 is a convex surface, and the image-side surface 12 of the first lens element 1 is a concave surface; the second lens element 2 has a negative refractive index, the object-side surface 21 of the second lens element 2 is concave, and the image-side surface 22 of the second lens element 2 is concave; the third lens element 3 has a positive refractive index, the object-side surface 31 of the third lens element 3 is convex, and the image-side surface 32 of the third lens element 3 is concave; the first lens 1 to the third lens 3 constitute a focusing lens group, and are relatively movable on the optical axis I with respect to the stop 120, and perform a refocusing function.

The fourth lens element 4 has a positive refractive index, the object-side surface 41 of the fourth lens element 4 is a convex surface, and the image-side surface 42 of the fourth lens element 4 is a convex surface; the fifth lens element 5 has a positive refractive index, the object-side surface 51 of the fifth lens element 5 is convex, and the image-side surface 52 of the fifth lens element 5 is convex; the sixth lens element 6 has a negative refractive index, the object-side surface 61 of the sixth lens element 6 is concave, and the image-side surface 62 of the sixth lens element 6 is concave; the seventh lens element 7 has a negative refractive index, the object-side surface 71 of the seventh lens element 7 is a flat surface, and the image-side surface 72 of the seventh lens element 7 is a concave surface; the eighth lens element 8 has a positive refractive index, the object-side surface 81 of the eighth lens element 8 is a convex surface, and the image-side surface 82 of the eighth lens element 8 is a convex surface; the ninth lens element 9 with negative refractive index has a concave object-side surface 91 and a convex image-side surface 92 of the ninth lens element 9; the tenth lens element 100 with positive refractive power has a convex object-side surface 101 of the tenth lens element 100 and a convex image-side surface 102 of the tenth lens element 100; the eleventh lens element 110 has a negative refractive index, the object-side surface 111 of the eleventh lens element 110 is concave, and the image-side surface 112 of the eleventh lens element 110 is concave; the fourth lens 4 to the eleventh lens 110 constitute a variable power lens group, and are relatively movable on the optical axis I with respect to the stop 120, and function to perform zooming and magnification-varying.

The object-side surface 41 and the image-side surface 42 of the fourth lens element 4 are both aspheric.

In this embodiment, the second lens 2 and the third lens 3 are cemented with each other, the fifth lens 5 and the sixth lens 6 are cemented with each other, the eighth lens 8 and the ninth lens 9 are cemented with each other, and the tenth lens 100 and the eleventh lens 110 are cemented with each other, but the invention is not limited thereto.

In the present embodiment, the first lens 1 to the eleventh lens 110 are made of a glass material, but not limited thereto.

Of course, in other embodiments, the object-side surface 11 of the first lens element 1 may be a concave surface or a flat surface, the image-side surface 32 of the third lens element 3 may be a flat surface or a convex surface, and the object-side surface 71 of the seventh lens element 7 may be a convex surface or a concave surface.

Detailed optical data at the shortest focal length of this embodiment are shown in table 1-1.

TABLE 1-1 detailed optical data at shortest focal length of example one

In this embodiment, the object-side surface 41 and the image-side surface 42 are defined by the following aspheric curve formula:

wherein:

z: depth of the aspheric surface (the vertical distance between a point on the aspheric surface that is y from the optical axis and a tangent plane tangent to the vertex on the optical axis of the aspheric surface);

c: curvature of aspheric vertex (thevertexcurvature);

k: cone coefficient (Conicconstant);

radial distance (radialdistance);

r_n: normalized radius (normalizationradius (nradius));

u：r/r_n；

a_m: mth order Q^conCoefficient (isthem)^thQ^concoefficient)；

Q_m ^con: mth order Q^conPolynomial (then)^thQ^conpolynomial)；

For details of parameters of each aspheric surface, please refer to the following table:

surface of

K＝

a₄＝

a₆＝

a₈＝

a₁₀＝

a₁₂＝

41

-2.666

-6.06E-05

-2.13E-06

-7.87E-09

-6.87E-10

-3.34E-12

42

1.288

-1.80E-05

-1.68E-06

-4.00E-09

-5.01E-10

-1.47E-12

Please refer to table 5 for the values of the conditional expressions related to this embodiment.

Referring to fig. 3 to 5, the MTF graphs of the present embodiment show that the transfer function is well controlled and the resolution is high, and the resolutions of the short focus, the middle focus and the long focus can reach 200 lp/mm; the defocusing graphs refer to fig. 6-7, and it can be seen that visible and infrared defocusing is within 10 μm, which can meet the use requirement of day and night.

In the present embodiment, the focal length f of the zoom lens is 4-10 mm; the minimum aperture value FNO is 1.3, the field angle FOV is 150 ° -56 °, the image plane height IMH is 9.5mm, and the distance TTL between the object-side surface 11 of the first lens 1 and the imaging surface 140 on the optical axis I is 61.71mm in the shortest focal length.

Example two

In this embodiment, the surface convexities and concavities and refractive indexes of the lenses are substantially the same as those of the first embodiment, only the object-side surface 11 of the first lens element 1 is a concave surface, and the object-side surface 71 of the seventh lens element 7 is a convex surface, and the optical parameters such as the curvature radius of the lens surfaces and the lens thickness are different.

The detailed optical data at the shortest focal length of this embodiment is shown in table 2-1.

TABLE 2-1 detailed optical data at shortest focal Length for example two

For the detailed data of the parameters of each aspheric surface of this embodiment, refer to the following table:

surface of

K＝

a₄＝

a₆＝

a₈＝

a₁₀＝

a₁₂＝

41

-2.53

-5.67E-05

-2.18E-06

-1.05E-08

-7.19E-10

7.84E-14

42

1.21

-1.54E-05

-1.85E-06

-6.64E-09

-4.83E-10

4.46E-13

Referring to fig. 8 to 10, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, and the resolutions of the short focal length, the middle focal length and the long focal length can all reach 200 lp/mm; referring to fig. 11-12, it can be seen that the visible and infrared defocusing is within 10 μm, which can meet the use requirement of day and night.

In the present embodiment, the focal length f of the zoom lens is 4-10 mm; the minimum aperture value FNO is 1.3, the field angle FOV is 150 ° -56 °, the image plane height IMH is 9.5mm, and 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 61.49mm at the shortest focal length.

EXAMPLE III

In this embodiment, the surface convexities and concavities and refractive indexes of the respective lenses are substantially the same as those of the first embodiment, only the object-side surface 11 of the first lens element 1 is a flat surface, the image-side surface 32 of the third lens element 3 is a flat surface, and optical parameters such as the curvature radius of the surface of each lens element and the thickness of each lens element are different.

The detailed optical data at the shortest focal length of this embodiment is shown in table 3-1.

TABLE 3-1 detailed optical data at shortest focal length for example III

Referring to fig. 13 to 15, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, and the resolutions of the short focal length, the middle focal length and the long focal length can all reach 200 lp/mm; defocus graphs referring to fig. 16-17, it can be seen that visible and infrared defocus within 10 μm can achieve the use requirement of day and night.

In the present embodiment, the focal length f of the zoom lens is 4-10 mm; the minimum aperture value FNO is 1.3, the field angle FOV is 150 ° -54 °, the image plane height IMH is greater than 9.5mm, and 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 55.23mm at the shortest focal length.

Example four

In this embodiment, the surface convexities and concavities and refractive indexes of the lenses are substantially the same as those of the first embodiment, only the object-side surface 11 of the first lens element 1 is a concave surface, the object-side surface 71 of the seventh lens element 7 is a convex surface, the second lens element 2 and the third lens element 3 are not cemented, and optical parameters such as the curvature radius of the surfaces of the lenses and the lens thickness are different.

The detailed optical data at the shortest focal length of this embodiment is shown in table 4-1.

TABLE 4-1 detailed optical data at shortest focal length for example four

surface of

K＝

a₄＝

a₆＝

a₈＝

a₁₀＝

a₁₂＝

41

-2.51

-6.08E-05

-1.96E-06

-1.50E-08

-6.49E-10

1.27E-12

42

1.32

-1.81E-05

-1.77E-06

-7.19E-09

-4.32E-10

4.22E-13

Referring to fig. 18 to 20, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, and the resolutions of the short focal length, the middle focal length and the long focal length can all reach 200 lp/mm; the defocus graphs shown in FIGS. 21-22 show that visible and infrared defocus within 10 μm can be used for day and night.

In the present embodiment, the focal length f of the zoom lens is 4-10 mm; the minimum aperture value FNO is 1.3, the field angle FOV is 150 ° -54 °, the image plane height IMH is >9.5mm, and 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 68.17mm at the shortest focal length.

TABLE 5 numerical table of relational expressions of four embodiments of the present invention

	Example one	Example two	EXAMPLE III	Example four
					F1	-11.4	-11.5	-10.9	-10.8
F2	12.6	12.5	11.6	12.4
					∣F1/F2∣	0.90	0.92	0.94	0.87
∣f2/f3∣	0.91	0.93	0.93	0.89
					∣f6/f10∣	1.11	1.06	1.02	1.06
∣vd5-vd6∣	60.67	60.67	60.76	60.76
					∣vd10-vd11∣	38.86	38.86	38.86	38.86

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A high-resolution zoom lens, characterized in that: the lens assembly comprises first to third lenses, a diaphragm, and fourth to eleventh lenses in sequence from an object side to an image side along an optical axis; the first lens element to the eleventh lens element each include an object-side surface facing the object side and passing the imaging light, and an image-side surface facing the image side and passing the imaging light;

2. A high resolution zoom lens according to claim 1, further satisfying: 0.8 < | F1/F2 | < 1.2, wherein F1 is the focal length of the focusing lens assembly, and F2 is the focal length of the zooming lens assembly.

3. A high resolution zoom lens according to claim 1, further satisfying: 0.8 < | f2/f3 | < 1.2, f2 is the focal length of the second lens element, and f3 is the focal length of the third lens element.

4. A high resolution zoom lens according to claim 1, further satisfying: 0.8 < | f6/f10 | < 1.2, wherein f6 is the focal length of the sixth lens element, and f10 is the focal length of the tenth lens element.

5. A high resolution zoom lens according to claim 1, further satisfying: nd1 > 1.8, where nd1 is the refractive index of the first lens.

6. The high-resolution zoom lens according to claim 1, wherein: the second lens and the third lens are mutually cemented, the fifth lens and the sixth lens are mutually cemented, the eighth lens and the ninth lens are mutually cemented, and the tenth lens and the eleventh lens are mutually cemented.

7. The high resolution zoom lens according to claim 6, further satisfying: | vd5-vd6 | 30, where vd5 is the Abbe number of the fifth lens and vd6 is the Abbe number of the sixth lens.

8. The high resolution zoom lens according to claim 6, further satisfying: | vd10-vd11 | 30, where vd10 is the Abbe number of the tenth lens and vd11 is the Abbe number of the eleventh lens.

9. The high-resolution zoom lens according to claim 1, wherein: the first lens to the eleventh lens are made of glass materials.