CN115373113A - Imaging lens system and electronic device - Google Patents

Abstract

An imaging lens system is provided. The imaging lens system includes: a first lens having a concave object-side surface; a second lens having positive refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having an Abbe number greater than 20 and less than 40; and a seventh lens having refractive power, wherein the first lens to the seventh lens are arranged in order from the object side to the imaging side, and the imaging lens system satisfies the following conditional expression: TTL/(ImgHT × 2) <0.8 and 100 ° < FOV, where TTL is the distance from the object-side surface of the first lens to the imaging plane, imgHT is the height of the imaging plane, and FOV is the angle of view of the imaging lens system. An electronic device is also provided.

Description

Imaging lens system and electronic device

Cross Reference to Related Applications

This application claims the benefit of priority of korean patent application No. 10-2022-0038054, filed in the korean intellectual property office at 28.3.2022, the entire disclosure of which is incorporated herein by reference for all purposes.

Technical Field

The following description relates to an imaging lens system.

Background

The portable electronic device may include a camera module or device that captures images or video. In an example, the camera module may be installed in a mobile phone, a notebook computer, a game machine, or the like, as non-limiting examples.

The resolution and resolving power of the camera module and the resolution and resolving power of the imaging lens system may be proportional to the size of the sensor and the size of the imaging plane. In an example, to implement a camera module and an imaging lens system with high resolution, a sensor and an imaging plane having a considerable size may be required. However, since the size (or length) of the camera module and the imaging lens system increases in proportion to the size of the sensor and the size of the imaging plane, it may be difficult to mount such a camera module and imaging lens system having a high resolution in a thin electronic device such as a smart phone.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In a general aspect, an imaging lens system includes: a first lens having a concave object side surface; a second lens having a positive refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having an Abbe number greater than 20 and less than 40; and a seventh lens having refractive power, wherein the first lens to the seventh lens are arranged in order from the object side to the imaging side, and wherein the imaging lens system satisfies the following conditional expression: TTL/(ImgHT × 2) <0.8 and 100 ° < FOV, where TTL is the distance from the object side surface of the first lens to the imaging plane, imgHT is the height of the imaging plane, and FOV is the angle of view of the imaging lens system.

The second lens may have a convex object side.

The third lens may have a convex object side.

The fourth lens may have a concave object side surface.

The fifth lens may have a convex object side.

The sixth lens may have a convex object side.

The seventh lens may have a concave object side surface.

The imaging lens system may satisfy the following conditional expression: sumD/SumT <0.9, where SumD is the sum of air gaps between the first lens to the seventh lens, and SumT is the sum of thicknesses of each of the first lens to the seventh lens.

The imaging lens system may satisfy the following conditional expression: 0.38< -yc72/L72 ER, where Yc72 is the shortest distance from the point on the image-side surface of the seventh lens closest to the imaging surface to the optical axis, and L72ER is the effective radius of the image-side surface of the seventh lens.

In a general aspect, an imaging system includes: a first lens having a negative refractive power; a second lens having positive refractive power; a third lens having a convex object side; a fourth lens having a concave object-side surface; a fifth lens having positive refractive power; a sixth lens having a convex object-side surface; and a seventh lens having refractive power, wherein the first lens to the seventh lens are arranged in order from the object side to the imaging side, and wherein the imaging lens system satisfies the following conditional expression: 2.8< (V5 + V7)/V6 <4.8 and 0.62 <ttl/(ImgHT × 2) <0.72, where V5 is the abbe number of the fifth lens, V6 is the abbe number of the sixth lens, V7 is the abbe number of the seventh lens, TTL is the distance from the object-side surface of the first lens to the imaging surface, and ImgHT is the height of the imaging surface.

The first lens may have a concave object side surface.

The second lens may have a convex object side.

The fifth lens may have a concave object side surface.

The seventh lens may have a convex object side.

The imaging lens system may satisfy the following conditional expression: -2.0< -f 6/f <6.0, where f is the focal length of the imaging lens system, and f6 is the focal length of the sixth lens.

The imaging lens system may satisfy the following conditional expression: 0.4< | f1/f2| <1.5, where f1 is the focal length of the first lens and f2 is the focal length of the second lens.

Other features and aspects will become apparent from the following detailed description, the appended claims, the drawings, and the following drawings.

Drawings

Fig. 1 shows a configuration diagram of an exemplary imaging lens system according to a first example.

Fig. 2 shows an aberration curve of the exemplary imaging lens system shown in fig. 1.

Fig. 3 shows a configuration diagram of an exemplary imaging lens system according to a second example.

Fig. 4 shows an aberration curve of the exemplary imaging lens system shown in fig. 3.

Fig. 5 shows a configuration diagram of an exemplary imaging lens system according to a third example.

Fig. 6 shows an aberration curve of the exemplary imaging lens system shown in fig. 5.

Fig. 7 shows a configuration diagram of an exemplary imaging lens system according to a fourth example.

Fig. 8 shows an aberration curve of the exemplary imaging lens system shown in fig. 7.

Fig. 9 shows a configuration diagram of an exemplary imaging lens system according to a fifth example.

Fig. 10 shows an aberration curve of the exemplary imaging lens system shown in fig. 9.

Fig. 11 shows a configuration diagram of an exemplary imaging lens system according to a sixth example.

Fig. 12 shows an aberration curve of the exemplary imaging lens system shown in fig. 11.

Fig. 13 shows a configuration diagram of an exemplary imaging lens system according to a seventh example.

Fig. 14 shows an aberration curve of the exemplary imaging lens system shown in fig. 13.

Throughout the drawings and detailed description, like reference numbers may refer to the same or similar elements. The figures may not be drawn to scale and the relative sizes, proportions and depictions of the elements in the figures may be exaggerated for clarity, illustration and convenience.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatuses, and/or systems described herein. Various changes, modifications, and equivalents of the methods, devices, and/or systems described herein will, however, be apparent to those skilled in the art in view of the disclosure of this application. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, except as operations that must occur in a particular order, but may be changed as will be apparent after understanding the disclosure of the present application. Furthermore, the description of features known after understanding the disclosure of the present application may be omitted for greater clarity and conciseness, but it should be noted that the omission of features and their description is not intended to be an admission that they are common general knowledge.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, apparatuses, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in these examples may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples described herein.

Throughout the specification, when an element such as a layer, region or substrate is described as being "on," "connected to" or "coupled to" another element, it can be directly on, "connected to" or "coupled to" the other element or one or more other elements may be present between the element and the other element. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no other elements present between the element and the other element. Similarly, expressions such as "between 8230and" directly between 8230and "adjacent" and "directly adjacent" may also be explained as previously described.

The terminology used herein is for the purpose of describing particular examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and/or" includes any one of the associated listed items as well as any combination of any two or more of the items. As used herein, the terms "comprises," "comprising," and "having" specify the presence of stated features, integers, operations, elements, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof. In this document, the use of the word "may" with respect to an example or embodiment, such as with respect to what the example or embodiment may comprise or implement, means that there is at least one example or embodiment in which such feature is comprised or implemented, and that all examples or embodiments are not so limited.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs after understanding the present disclosure. Such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In a non-limiting example, an exemplary imaging lens system may be installed in a portable electronic device.

In one or more examples, the first lens refers to a lens closest to an object (or object), and the seventh lens refers to a lens closest to an imaging plane (or image sensor). In one or more examples, the units of the radius of curvature, the thickness, TTL (distance from the object side surface of the first lens to the imaging surface), imgHT (height of the imaging surface), the focal length, and the effective diameter of the lens are expressed in millimeters (mm).

The thickness of the lenses, the distance between the lenses, and TTL refer to the distance of the lenses along the optical axis of the imaging lens system. In addition, in the description of the shape of the lens, the configuration in which one surface is convex means that the paraxial region of the surface is convex, and the configuration in which one surface is concave means that the paraxial region of the surface is concave. Thus, even when one surface of the lens is described as convex, the edge of the lens may be concave. Similarly, even when one surface of the lens is described as being concave, the edge of the lens may be convex.

The imaging lens system described in one or more examples may be configured to be mounted on a portable electronic device. In an example, an imaging lens system according to one or more examples may be mounted on at least one of a camera module provided in a front or a rear of a smartphone as a non-limiting example. As another example, an imaging lens system according to one or more examples may be installed on a notebook computer, an augmented reality device, a virtual reality device, a portable game console, and the like, as non-limiting examples. The implementation range and examples of the exemplary imaging lens system are not limited to the above-described electronic devices. In an example, the imaging lens system may provide a narrow installation space, but may also be applied to an electronic device requiring high-resolution imaging.

The imaging lens system according to the first example may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in order from the object side to the imaging side.

The imaging lens system according to the first example may include a lens having a concave object-side surface. For example, in the imaging lens system according to the first example, the first lens may have a concave object side surface. The imaging lens system according to the first example may include a lens having a positive refractive power. For example, in the imaging lens system according to the first example, the second lens may have a positive refractive power. The imaging lens system according to the first example may include a lens having an abbe number of a certain magnitude. For example, the imaging lens system according to the first example may include a lens having an abbe number greater than 20 and less than 40. As a specific example, in the imaging lens system according to the first example, the abbe number of the sixth lens may be greater than 20 and less than 40. The imaging lens system according to the first example may be configured to satisfy a predetermined conditional expression. For example, the imaging lens system according to the first example may satisfy the conditional expressions TTL/(ImgHT × 2) <0.8 and 100 ° < FOV. For reference, in the above conditional expression, TTL is a distance from the object side surface of the first lens to the imaging plane, imgHT is a height of the imaging plane, and FOV is an angle of view of the imaging lens system.

The imaging lens system according to the second example may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in order from the object side to the imaging side. The imaging lens system according to the second example may include a lens having a negative refractive power. For example, in the imaging lens system according to the second example, the first lens may have a negative refractive power. The imaging lens system according to the second example may include a lens having a positive refractive power. For example, in the imaging lens system according to the second example, the second lens and the fifth lens may have positive refractive powers, respectively. The imaging lens system according to the second example may include a lens having a convex object side. For example, in the imaging lens system according to the second example, each of the third lens and the sixth lens may have a convex object side surface. The imaging lens system according to the second example may include a lens having a concave object side surface. For example, in the imaging lens system according to the second example, the fourth lens may have a concave object side surface. The imaging lens system according to the second example may be configured to satisfy a predetermined conditional expression. For example, the imaging lens system according to the second example may satisfy conditional expressions 2.8< (V5 + V7)/V6 <4.8 and 0.62 straw ttl/(ImgHT × 2) <0.72. For reference, in the above conditional expressions, V5 is an abbe number of the fifth lens, V6 is an abbe number of the sixth lens, V7 is an abbe number of the seventh lens, TTL is a distance from the object-side surface of the first lens to the imaging plane, and ImgHT is a height of the imaging plane.

The imaging lens system according to the third example may satisfy one or more of the following conditional expressions. However, the imaging lens system according to only the third example does not satisfy the following conditional expression. For example, the imaging lens systems according to the first and second examples may satisfy one or more of the following conditional expressions:

SumD/SumT<0.9

0.38<Yc72/L72ER

-2.0<f6/f<6.0

0.4<|f1/f2|<1.5

TTL/f<2.5

in the above conditional expressions, sumD is the sum of the air gaps between the first lens to the seventh lens, sumT is the sum of the thicknesses of the first lens to the seventh lens, yc72 is the shortest distance from the point on the image-side surface of the seventh lens closest to the imaging surface to the optical axis, L72ER is the effective radius of the image-side surface of the seventh lens, f is the focal length of the imaging lens system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f6 is the focal length of the sixth lens, and TTL is the distance from the object-side surface of the first lens to the imaging surface.

The imaging lens system according to the fourth example may satisfy one or more of the following conditional expressions. However, the imaging lens system according to only the fourth example does not satisfy the following conditional expression. For example, the imaging lens systems according to the first to third examples may satisfy one or more of the following conditional expressions:

0.30<SumD/SumT<0.90

1.8<TTL/f<2.5

0.8<f3/f<1.4

-5.0<f4/f<-1.0

0.4<f5/f<1.4

-15<f7/f<-1.0

0.2<BFL/f<0.5

100<FOV<130

0.01<D12/f<0.2

0.6<Yc62/Yc72<1.2

in the above conditional expression, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f7 is a focal length of the seventh lens, BFL is a distance from an image-side surface of the seventh lens to an imaging surface, D12 is a distance from the image-side surface of the first lens to an object-side surface of the second lens on an optical axis, and Yc62 is a shortest distance from a point closest to the imaging surface on the image-side surface of the sixth lens to the optical axis.

An exemplary imaging lens system may include one or more lenses having the following characteristics, as needed. For example, the imaging lens systems according to the first to fourth examples may include one of the first to seventh lenses having the following characteristics. As another example, the imaging lens system according to the first to fourth examples may include two or more of the first to seventh lenses having the following characteristics. The exemplary imaging lens system according to the above example may not necessarily include a lens having the following characteristics. Hereinafter, characteristics of the first to seventh lenses will be described.

In an example, the first lens may have an optical power. The first lens may have a shape in which one surface is concave. For example, the first lens may have a concave object side surface. The first lens may include a spherical surface or an aspherical surface. For example, both surfaces of the first lens may be aspherical. The first lens may be formed of a material having high light transmittance and excellent workability. For example, the first lens may be formed of a plastic material or a glass material. The first lens may be configured to have a predetermined refractive index. For example, the refractive index of the first lens may be less than 1.6. As a specific example, the refractive index of the first lens may be greater than 1.52 and less than 1.56. The first lens may have a predetermined abbe number. For example, the abbe number of the first lens may be 50 or more. As a specific example, the abbe number of the first lens may be greater than 53 and less than 58.

In an example, the second lens may have an optical power. The second lens may have a shape in which one surface is convex. For example, the second lens may have a convex object side. The second lens may include a spherical surface or an aspherical surface. For example, both surfaces of the second lens may be aspherical. The second lens may be formed of a material having high light transmittance and excellent workability. For example, the second lens may be formed of a plastic material or a glass material. The second lens may be configured to have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.5. As a specific example, the refractive index of the second lens may be greater than 1.54 and less than 1.64. The second lens may have a predetermined abbe number. For example, the abbe number of the second lens may be 20 or more. As a specific example, the abbe number of the second lens may be greater than 20 and less than 60.

In an example, the third lens may have an optical power. The third lens may have a shape in which one surface is convex. For example, the third lens may have a convex object side. The third lens may include a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having high light transmittance and excellent workability. For example, the third lens may be formed of a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be greater than 1.5. As a specific example, the refractive index of the third lens may be greater than 1.52 and less than 1.56. The third lens may have a predetermined abbe number. For example, the third lens may have an abbe number of 50 or more. As a specific example, the abbe number of the third lens may be greater than 53 and less than 58.

In an example, the fourth lens may have an optical power. The fourth lens may have a shape in which one surface is concave. For example, the fourth lens may have a concave object side surface. The fourth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be formed of a material having high light transmittance and excellent workability. For example, the fourth lens may be formed of a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.6. As a specific example, the refractive index of the fourth lens may be greater than 1.65 and less than 1.70. The fourth lens may have a predetermined abbe number. For example, the abbe number of the fourth lens may be less than 24. As a specific example, the abbe number of the fourth lens may be greater than 16 and less than 24.

In an example, the fifth lens may have an optical power. The fifth lens may have a shape in which one surface is convex. For example, the fifth lens may have a convex object side. However, the object side surface of the fifth lens may not necessarily be convex. For example, the object side surface of the fifth lens may be concave. The fifth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material having high light transmittance and excellent workability. For example, the fifth lens may be formed of a plastic material or a glass material. The fifth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fifth lens may be greater than 1.5. As a specific example, the refractive index of the fifth lens may be greater than 1.52 and less than 1.60. The fifth lens may have a predetermined abbe number. For example, the abbe number of the fifth lens may be greater than 50. As a specific example, the abbe number of the fifth lens may be greater than 52 and less than 60.

In an example, the sixth lens may have an optical power. The sixth lens may have a shape in which one surface is convex. For example, the sixth lens may have a convex object side. The sixth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. The inflection point may be formed on one or both surfaces of the sixth lens. For example, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens. The sixth lens may be formed of a material having high light transmittance and excellent workability. For example, the sixth lens may be formed of a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be greater than 1.5. As a specific example, the refractive index of the sixth lens may be greater than 1.54 and less than 1.65. The sixth lens may have a predetermined abbe number. For example, the abbe number of the sixth lens may be greater than 20. As a specific example, the abbe number of the sixth lens may be greater than 20 and less than 40.

In an example, the seventh lens may have an optical power. The seventh lens may have a shape in which one surface is concave. For example, the seventh lens may have a concave object side surface. However, the object side surface of the seventh lens may not necessarily be concave. For example, the object side surface of the seventh lens may be convex. The seventh lens may include a spherical surface or an aspherical surface. For example, both surfaces of the seventh lens may be aspherical. An inflection point may be formed on one or both surfaces of the seventh lens. For example, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens. The seventh lens may be formed of a material having high light transmittance and excellent workability. For example, the seventh lens may be formed of a plastic material or a glass material. The seventh lens may be configured to have a predetermined refractive index. For example, the refractive index of the seventh lens may be greater than 1.5. As a specific example, the refractive index of the seventh lens may be greater than 1.52 and less than 1.57. The seventh lens may have a predetermined abbe number. For example, the abbe number of the seventh lens may be greater than 60. As a specific example, the abbe number of the seventh lens may be greater than 60 and less than 70.

As described above, the first to seventh lenses may include spherical surfaces or aspherical surfaces. When the first to seventh lenses include aspherical surfaces, the aspherical surfaces of the respective lenses may be represented by the following equation 1:

equation 1:

in equation 1, c is the inverse of the radius of curvature of the corresponding lens, K is a conic constant, r is the distance from any point on the aspherical surface to the optical axis, a to P are aspherical surface constants, and Z (or SAG) is the height in the optical axis direction from a certain point on the aspherical surface to the vertex of the corresponding aspherical surface.

The imaging lens system according to the above embodiment or the above example may further include a diaphragm and a filter. In an example, the imaging lens system may further include a stop disposed between the second lens and the third lens. In an example, the imaging lens system may further include a filter disposed between the seventh lens and the imaging plane. The diaphragm may be configured to adjust an amount of light incident in the imaging plane direction, and the filter may be configured to block light of a specific wavelength. For reference, the optical filter described in one or more examples may be configured to block infrared light, but light of a wavelength blocked by the optical filter is not limited to infrared light.

Hereinafter, one or more examples of an imaging lens system will be described with reference to the drawings.

An exemplary imaging lens system according to a first example will be described with reference to fig. 1.

Referring to fig. 1, an exemplary imaging lens system 100 may include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and a seventh lens 170.

In an example, the first lens 110 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens 120 may have a positive refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 130 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 140 may have a negative refractive power, and may have a concave object-side surface and a convex image-side surface. The fifth lens 150 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The sixth lens 160 may have a positive refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 160. The seventh lens 170 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 170.

The imaging lens system 100 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 170 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 110 to the seventh lens 170 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 100 configured as described above can exhibit the aberration characteristics shown in fig. 2. Table 1 and table 2 show lens characteristics and aspherical values of the imaging lens system according to the present example.

TABLE 1

Flour mark	Component part	Radius of curvature	Thickness/distance	Refractive index	Abbe number	Effective radius
							S1	First lens	-5.7836	0.2835	1.5441	56.1	2.1225
S2		6.2372	0.2110			1.8468
							S3	Second lens	2.2167	0.3777	1.6144	25.9	1.5134
S4		3.3683	0.5913			1.0854
							S5	Diaphragm	Infinity(s)	0.1000			0.8000
S6	Third lens	7.8935	0.7994	1.5441	56.1	0.9995
							S7		-2.6026	0.6023			1.1897
S8	Fourth lens	-3.7595	0.2800	1.6707	19.2	1.3630
							S9		-16.3450	0.1213			1.8300
S10	Fifth lens element	1000.00	0.9027	1.5441	56.1	1.8424
							S11		-2.4288	0.5205			2.0300
S12	Sixth lens element	1.3088	0.3105	1.6349	23.9	2.5836
							S13		1.3823	0.5630			3.1117
S14	Seventh lens element	-3.5090	0.2000	1.5350	55.7	3.6445
							S15		6.0000	0.3500			3.8282
S16	Light filter	Infinity(s)	0.2100	1.5168	64.2	4.5473
							S17		Infinity(s)	0.8185			4.6351
S18	Image plane	Infinity(s)	0.0300			5.2579

TABLE 2

An exemplary imaging lens system according to a second example will be described with reference to fig. 3.

Exemplary imaging lens system 200 may include a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, and a seventh lens 270.

In an example, the first lens 210 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens 220 may have a positive refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 230 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 240 may have a negative refractive power, and may have a concave object-side surface and a convex image-side surface. The fifth lens 250 may have a positive refractive power, and may have a concave object-side surface and a convex image-side surface. Sixth lens 260 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 260. The seventh lens 270 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 270.

The imaging lens system 200 may further include a filter IF and an imaging plane IP. In an example, the filter IF may be disposed between the seventh lens 270 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 210 to the seventh lens 270 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 200 configured as described above can exhibit the aberration characteristics shown in fig. 4. Tables 3 and 4 below show lens characteristics and aspherical surface values of the imaging lens system according to the present example.

TABLE 3

Flour mark	Component part	Radius of curvature	Thickness/distance	Refractive index	Abbe number	Effective radius
							S1	First lens	-5.0652	0.3292	1.5441	56.1	2.0400
S2		7.8224	0.1770			1.7290
							S3	Second lens	2.1774	0.2300	1.5441	56.1	1.3336
S4		3.5041	0.5260			1.0633
							S5	Diaphragm	Infinity(s)	0.1000			0.8000
S6	Third lens	10.1354	0.7501	1.5441	56.1	0.9896
							S7		-2.5867	0.6768			1.1771
S8	Fourth lens	-3.4908	0.2775	1.6707	19.2	1.3831
							S9		-12.9494	0.0585			1.8300
S10	Fifth lens element	-14.9636	0.8839	1.5441	56.1	1.8683
							S11		-2.1614	0.4452			2.0000
S12	Sixth lens element	1.4245	0.4517	1.6349	23.9	2.4353
							S13		1.4481	0.4899			3.1296
S14	Seventh lens element	-6.3803	0.3600	1.5350	55.7	4.1678
							S15		4.6486	0.3500			4.3993
S16	Light filter	Infinity(s)	0.2100	1.5168	64.2	4.6595
							S17		Infinity(s)	0.8442			4.7353
S18	Image plane	Infinity(s)	0.0300			5.2614

Table 4:

flour mark	S1	S2	S3	S4	S6	S7	S8
								K	-78.3332	-2.9935	-2.0260	8.6825	-34.0468	3.2586	3.9416
A	0.0912	0.1143	-0.0023	-0.0956	-0.0058	0.1499	0.0243
								B	-0.0268	-0.0396	-0.8348	0.0715	0.1536	-2.1756	-0.3517
C	-0.0445	-0.0678	6.3209	7.6461	-0.7657	16.3552	-0.4798
								D	0.1157	0.2282	-27.2543	-88.7376	-0.3980	-78.2398	8.4642
E	-0.1466	-0.5872	77.5251	544.0284	22.6730	252.4886	-35.0700
								F	0.1209	1.0334	-154.7608	-2151.8841	-127.2656	-569.8487	84.4442
G	-0.0687	-1.1914	223.1808	5875.9200	395.0963	918.9624	-135.5891
								H	0.0275	0.9205	-235.0556	-11404.7205	-798.1125	-1069.9189	152.4008
J	-0.0077	-0.4862	180.4968	15883.0820	1100.9790	899.3798	-121.9676
								L	0.0015	0.1763	-99.6907	-15772.7243	-1046.5920	-539.6377	69.3078
M	-0.0002	-0.0432	38.4774	10903.9768	673.9801	224.9525	-27.3432
								N	0.0000	0.0068	-9.8301	-4986.1679	-280.3691	-61.7913	7.1197
O	0.0000	-0.0006	1.4910	1355.4220	67.8617	10.0414	-1.0996
								P	0.0000	0.0000	-0.1015	-165.7968	-7.2473	-0.7304	0.0762
Flour mark	S9	S10	S11	S12	S13	S14	S15
								K	49.1829	-99.0000	-0.9399	-7.3326	-3.8666	-64.5384	-43.3537
A	0.2146	0.1690	-0.1845	-0.0965	-0.1439	-0.0270	-0.0007
								B	-1.0522	-0.5341	0.2218	-0.0085	0.0459	0.0150	-0.0004
C	2.3464	0.8384	-0.0596	-0.0093	0.0162	-0.0045	0.0000
								D	-3.1870	-0.7463	-0.2970	0.0952	-0.0315	0.0011	0.0000
E	1.9662	0.0182	0.5941	-0.1424	0.0198	-0.0003	0.0000
								F	1.2629	0.8642	-0.6069	0.1101	-0.0073	0.0000	0.0000
G	-4.0308	-1.1677	0.3959	-0.0528	0.0018	0.0000	0.0000
								H	4.3694	0.8529	-0.1743	0.0167	-0.0003	0.0000	0.0000
J	-2.8767	-0.4016	0.0528	-0.0036	0.0000	0.0000	0.0000
								L	1.2623	0.1275	-0.0110	0.0005	0.0000	0.0000	0.0000
M	-0.3729	-0.0272	0.0016	0.0000	0.0000	0.0000	0.0000
								N	0.0715	0.0038	-0.0001	0.0000	0.0000	0.0000	0.0000
O	-0.0081	-0.0003	0.0000	0.0000	0.0000	0.0000	0.0000
								P	0.0004	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000

An exemplary imaging lens system according to a third example will be described with reference to fig. 5.

Exemplary imaging lens system 300 may include a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, and a seventh lens 370.

In an example, the first lens 310 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens 320 has a positive refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 330 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 340 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. Fifth lens 350 has positive refractive power and may have a convex object-side surface and a convex image-side surface. The sixth lens 360 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 360. The seventh lens 370 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 370.

The imaging lens system 300 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 370 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 310 to the seventh lens 370 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 300 configured as above can exhibit the aberration characteristics shown in fig. 6. Tables 5 and 6 show lens characteristics and aspherical values of the imaging lens system according to the present example.

TABLE 5

TABLE 6

Flour mark	S1	S2	S3	S4	S6	S7	S8
								K	-60.2046	55.3146	-3.2942	1.5474	-85.7565	3.5259	12.3795
A	0.0816	0.0932	0.0901	0.0038	0.0059	-0.0543	-0.1704
								B	-0.0602	-0.1538	-0.1325	0.0920	-0.0082	-0.0763	0.3170
C	0.0413	0.1929	0.2984	-0.4114	0.0013	0.6460	-1.9970
								D	-0.0229	-0.1954	-0.6112	1.2271	-0.0111	-3.4048	7.9264
E	0.0098	0.1553	0.8422	-2.7620	0.0013	11.6070	-20.3864
								F	-0.0031	-0.0940	-0.7711	4.5465	0.0067	-27.2988	35.8266
G	0.0007	0.0428	0.4830	-5.4285	-0.0050	45.8690	-44.3994
								H	-0.0001	-0.0145	-0.2108	4.7685	0.0018	-55.9388	39.5288
J	0.0000	0.0037	0.0645	-3.0819	-0.0004	49.5870	-25.4321
								L	0.0000	-0.0007	-0.0137	1.4366	0.0001	-31.5850	11.7306
M	0.0000	0.0001	0.0020	-0.4653	0.0000	14.0635	-3.7816
								N	0.0000	0.0000	-0.0002	0.0986	0.0000	-4.1489	0.8083
O	0.0000	0.0000	0.0000	-0.0122	0.0000	0.7275	-0.1028
								P	0.0000	0.0000	0.0000	0.0007	0.0000	-0.0573	0.0059
Flour mark	S9	S10	S11	S12	S13	S14	S15
								K	99.0000	99.0000	-1.1174	-19.8893	-6.6924	-74.7454	-8.4635
A	-0.1213	-0.0112	0.0414	0.0305	0.0441	-0.0435	-0.0187
								B	-0.0466	-0.2053	0.0520	-0.0324	-0.0361	0.0109	0.0010
C	0.1526	0.6068	-0.1910	0.0093	0.0108	-0.0021	0.0000
								D	0.0420	-0.9216	0.3053	-0.0029	-0.0015	0.0003	0.0000
E	-0.5322	0.9057	-0.3079	0.0012	-0.0001	0.0000	0.0000
								F	0.8929	-0.6266	0.2149	-0.0005	0.0001	0.0000	0.0000
G	-0.8187	0.3171	-0.1074	0.0001	0.0000	0.0000	0.0000
								H	0.4833	-0.1191	0.0388	0.0000	0.0000	0.0000	0.0000
J	-0.1939	0.0331	-0.0100	0.0000	0.0000	0.0000	0.0000
								L	0.0536	-0.0067	0.0018	0.0000	0.0000	0.0000	0.0000
M	-0.0101	0.0010	-0.0002	0.0000	0.0000	0.0000	0.0000
								N	0.0012	-0.0001	0.0000	0.0000	0.0000	0.0000	0.0000
O	-0.0001	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000
								P	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000

An exemplary imaging lens system according to a fourth example will be described with reference to fig. 7.

The exemplary imaging lens system 400 may include a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, and a seventh lens 470.

In an example, the first lens 410 may have a negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 420 may have a positive refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 430 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 440 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens 450 may have a positive refractive power, and may have a concave object-side surface and a convex image-side surface. The sixth lens 460 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 460. The seventh lens 470 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 470.

The imaging lens system 400 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 470 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 410 to the seventh lens 470 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 400 configured as described above can exhibit the aberration characteristics shown in fig. 8. Tables 7 and 8 below show lens characteristics and aspherical values of the imaging lens system according to the present example.

TABLE 7

TABLE 8

Flour mark	S1	S2	S3	S4	S6	S7	S8
								K	-59.9009	43.9925	-3.8006	2.7003	44.5804	1.9778	4.0515
A	0.0722	0.1433	0.1459	0.0000	-0.0062	-0.0493	-0.2894
								B	-0.0465	-0.2558	-0.2686	-0.0047	-0.0029	-0.0874	0.8848
C	0.0284	0.3616	0.4640	0.0064	-0.0137	0.7996	-3.7181
								D	-0.0141	-0.4175	-0.7542	-0.2230	0.0150	-4.0213	11.4592
E	0.0052	0.3698	0.8294	0.2064	-0.0120	12.5494	-25.6384
								F	-0.0014	-0.2441	-0.5971	0.8577	0.0071	-25.9233	43.1046
G	0.0003	0.1191	0.2922	-2.7173	-0.0028	36.3952	-54.8988
								H	0.0000	-0.0428	-0.0998	3.7676	0.0007	-34.6942	52.6184
J	0.0000	0.0113	0.0240	-3.0895	-0.0001	21.6140	-37.4218
								L	0.0000	-0.0021	-0.0040	1.6084	0.0000	-7.7179	19.3228
M	0.0000	0.0003	0.0005	-0.5378	0.0000	0.6704	-7.0004
								N	0.0000	0.0000	0.0000	0.1120	0.0000	0.6379	1.6796
O	0.0000	0.0000	0.0000	-0.0133	0.0000	-0.2626	-0.2389
								P	0.0000	0.0000	0.0000	0.0007	0.0000	0.0330	0.0152
Flour mark	S9	S10	S11	S12	S13	S14	S15
								K	-98.0709	91.1133	-1.0202	-42.6696	-11.2025	-99.0000	-10.8419
A	-0.4837	-0.3583	0.0978	0.0982	0.0425	-0.0690	-0.0201
								B	1.7306	1.5691	0.0124	-0.1059	-0.0322	0.0277	0.0015
C	-4.6741	-3.8989	-0.1591	0.0519	0.0102	-0.0070	0.0000
								D	8.1815	6.0012	0.2603	-0.0167	-0.0019	0.0012	0.0000
E	-9.6118	-6.1610	-0.2836	0.0036	0.0002	-0.0001	0.0000
								F	7.9120	4.4163	0.2292	-0.0005	0.0000	0.0000	0.0000
G	-4.6828	-2.2691	-0.1348	0.0001	0.0000	0.0000	0.0000
								H	2.0151	0.8456	0.0563	0.0000	0.0000	0.0000	0.0000
J	-0.6299	-0.2285	-0.0165	0.0000	0.0000	0.0000	0.0000
								L	0.1412	0.0442	0.0033	0.0000	0.0000	0.0000	0.0000
M	-0.0221	-0.0060	-0.0005	0.0000	0.0000	0.0000	0.0000
								N	0.0023	0.0005	0.0000	0.0000	0.0000	0.0000	0.0000
O	-0.0001	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000
								P	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000

An exemplary imaging lens system according to a fifth example will be described with reference to fig. 9.

Exemplary imaging lens system 500 may include a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, and a seventh lens 570.

The first lens 510 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. Second lens 520 may have a positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 530 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 540 may have a negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 550 may have a positive refractive power, and may have a concave object-side surface and a convex image-side surface. Sixth lens 560 may have a negative refractive power and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 560. The seventh lens 570 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 570.

The imaging lens system 500 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 570 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 510 to the seventh lens 570 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 500 configured as described above can exhibit the aberration characteristics shown in fig. 10. Tables 9 and 10 show lens characteristics and aspherical values of the imaging lens system according to the present example.

TABLE 9

Watch 10

An exemplary imaging lens system according to a sixth example will be described with reference to fig. 11.

Exemplary imaging lens system 600 may include a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, and a seventh lens 670.

The first lens 610 may have a negative refractive power and may have a concave object-side surface and a concave image-side surface. Second lens 620 may have a positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 630 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens 640 may have a negative refractive power, and may have a concave object-side surface and a convex image-side surface. Fifth lens 650 may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. The sixth lens 660 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 660. The seventh lens 670 may have a negative refractive power, and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 670.

The imaging lens system 600 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 670 and the image plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 610 to the seventh lens 670 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 600 configured as described above can exhibit the aberration characteristics shown in fig. 12. Tables 11 and 12 below show lens characteristics and aspherical surface values of the imaging lens system according to the present example.

TABLE 11

TABLE 12

An exemplary imaging lens system according to a seventh example will be described with reference to fig. 13.

Exemplary imaging lens system 700 may include a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, and a seventh lens 770.

In an example, the first lens 710 may have a negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens 720 may have a positive refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 730 may have a positive refractive power, and may have a convex object-side surface and a convex image-side surface. Fourth lens 740 may have a negative refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 750 may have a positive refractive power, and may have a concave object-side surface and a convex image-side surface. Sixth lens 760 may have a negative refractive power and may have a convex object-side surface and a concave image-side surface. Further, an inflection point may be formed on the object-side surface and the image-side surface of the sixth lens 760. The seventh lens 770 may have a negative refractive power and may have a convex object side surface and a concave image side surface. Further, an inflection point may be formed on the object side and the image side of the seventh lens 770.

The imaging lens system 700 may further include a filter IF and an imaging plane IP. The filter IF may be disposed between the seventh lens 770 and the imaging plane IP. The imaging plane IP may be formed at a position where light incident from the first lens 710 to the seventh lens 770 is focused. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

The imaging lens system 700 configured as described above can exhibit the aberration characteristics shown in fig. 14. Tables 13 and 14 below show lens characteristics and aspherical values of the imaging lens system according to the present example.

Watch 13

Flour mark	Component part	Radius of curvature	Thickness/distance	Refractive index	Abbe number	Effective radius
							S1	First lens	-4.0861	0.4652	1.5458	56.0	2.4600
S2		14.8764	0.3630			1.9555
							S3	Second lens	1.7751	0.3917	1.5458	56.0	1.2877
S4		2.3978	0.3404			0.9000
							S5	Diaphragm	Infinity(s)	0.1100			0.7200
S6	Third lens	6.4444	0.9111	1.5458	56.0	1.0542
							S7		-2.2855	0.3600			1.2181
S8	Fourth lens	-7.6898	0.3300	1.6769	19.2	1.3609
							S9		-312.52	0.1299			1.7300
S10	Fifth lens element	-2.7448	1.1499	1.5458	56.0	1.8009
							S11		-1.1057	0.0300			2.0823
S12	Sixth lens element	1.4011	0.4500	1.5699	37.4	2.9046
							S13		0.7860	0.3606			3.6035
S14	Seventh lens element	6.0000	0.4700	1.5458	56.0	3.8600
							S15		4.5741	0.4281			4.1473
S16	Light filter	Infinity(s)	0.2100	1.5168	64.2	4.6450
							S17		Infinity(s)	0.6450			4.7331
S18	Image plane	Infinity(s)	0.0250			5.2232

TABLE 14

Tables 15 and 16 show optical characteristic values and conditional expression values of the imaging lens systems according to the first to seventh examples.

Watch 15

	First example	Second example	Third example	Fourth example	Fifth example	Sixth example	Seventh example
								f1	-5.4699	-5.6001	-7.6162	-7.2974	-6.4643	-6.5705	-5.8229
f2	9.3805	9.9612	7.7815	6.8103	9.3863	6.9532	10.2477
								f3	3.6964	3.8678	4.6700	4.1631	3.2015	3.6854	3.2095
f4	-7.3449	-7.2101	-7.2563	-5.4602	-8.1463	-6.8503	-11.6512
								f5	4.4544	4.5327	2.4613	2.5083	2.5258	2.5293	2.7190
f6	14.6810	16.3231	-5.9383	-6.2328	-4.4596	-4.3412	-4.2782
								f7	-4.1082	-4.9698	-5.2059	-5.3263	-12.7955	-13.4289	-39.9088
TTL	7.2719	7.1900	7.1290	7.1290	7.1290	7.1290	7.1700
								BFL	1.4085	1.4342	1.1066	1.2642	1.0723	1.1888	1.3081
f	3.6642	3.5884	3.7058	3.8625	3.1441	3.5434	2.8995
								f number	1.9696	1.9696	1.9696	1.9696	1.9696	1.9696	1.9696
ImgHT	5.1200	5.1200	5.1200	5.1200	5.1200	5.1200	5.1200
								FOV	113.8000	113.8000	114.0800	112.0000	121.2000	111.8000	121.9600
Yc62	1.0199	1.2345	2.1285	2.0785	2.1925	2.1054	2.1042
								Yc72	1.4645	2.5600	1.8535	1.7870	2.6690	2.3050	2.4500

TABLE 16

The imaging lens system according to one or more examples may be mounted in a thin portable electronic device while achieving high resolution power and high resolution.

While the present disclosure includes specific examples, it will be apparent to those of ordinary skill in the art having had the benefit of the present disclosure that various changes in form and details may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only and not for purposes of limitation. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed to have a different order, and/or if components in the described systems, architectures, devices, or circuits are combined in a different manner and/or replaced or supplemented by other components or their equivalents.

Therefore, the scope of the present disclosure is defined not by the specific embodiments but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents should be understood as being included in the present disclosure.

Claims (17)

1. An imaging lens system comprising:

a first lens having a concave object-side surface;

a second lens having a positive refractive power;

a third lens having refractive power;

a fourth lens having refractive power;

a fifth lens having refractive power;

a sixth lens having an Abbe number greater than 20 and less than 40; and

a seventh lens having a refractive power,

wherein the first lens to the seventh lens are arranged in order from an object side to an imaging side,

wherein the imaging lens system satisfies the following conditional expression:

TTL/(ImgHT × 2) <0.8, and

100°<FOV，

wherein TTL is a distance from the object side surface of the first lens to an imaging plane, imgHT is a height of the imaging plane, and FOV is a viewing angle of the imaging lens system, and

wherein the imaging lens system has a total of seven lenses.

2. The imaging lens system of claim 1, wherein the second lens has a convex object side.

3. The imaging lens system of claim 1, wherein the third lens has a convex object side.

4. The imaging lens system of claim 1, wherein the fourth lens has a concave object side.

5. The imaging lens system of claim 1, wherein the fifth lens has a convex object side.

6. The imaging lens system of claim 1, wherein the sixth lens has a convex object side.

7. The imaging lens system of claim 1, wherein the seventh lens has a concave object side surface.

8. The imaging lens system according to claim 1, further satisfying the following conditional expression:

SumD/SumT<0.9，

wherein SumD is a sum of air gaps between the first lens to the seventh lens, and SumT is a sum of thicknesses of each of the first lens to the seventh lens.

9. The imaging lens system according to claim 1, further satisfying the following conditional expression:

0.38<Yc72/L72ER，

where Yc72 is a shortest distance from a point on an image side surface of the seventh lens, which is closest to the imaging surface, to an optical axis, and L72ER is an effective radius of the image side surface of the seventh lens.

10. An imaging lens system comprising:

a first lens having a negative refractive power;

a second lens having a positive refractive power;

a third lens having a convex object side;

a fourth lens having a concave object side surface;

a fifth lens having positive refractive power;

a sixth lens having a convex object-side surface; and

a seventh lens having a refractive power,

wherein the first lens to the seventh lens are arranged in order from an object side to an imaging side,

wherein the imaging lens system satisfies the following conditional expression:

2.8< (V5 + V7)/V6 <4.8, and

0.62<TTL/(ImgHT×2)<0.72，

wherein V5 is an abbe number of the fifth lens, V6 is an abbe number of the sixth lens, V7 is an abbe number of the seventh lens, TTL is a distance from an object side surface of the first lens to an imaging surface, and ImgHT is a height of the imaging surface, and

wherein the imaging lens system has a total of seven lenses.

11. The imaging lens system of claim 10, wherein the first lens has a concave object side.

12. The imaging lens system of claim 10, wherein the second lens has a convex object side.

13. The imaging lens system of claim 10, wherein the fifth lens has a concave object side.

14. The imaging lens system of claim 10, wherein the seventh lens has a convex object side.

15. The imaging lens system according to claim 10, further satisfying the following conditional expression:

-2.0<f6/f<6.0，

wherein f is a focal length of the imaging lens system, and f6 is a focal length of the sixth lens.

16. The imaging lens system according to claim 10, further satisfying the following conditional expression:

0.4<|f1/f2|<1.5，

wherein f1 is a focal length of the first lens, and f2 is a focal length of the second lens.

17. Electronic device comprising an imaging lens system according to claim 1 or 10.

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