Imaging lens system

Abstract

An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, arranged sequentially from the object side. The fourth lens has negative refractive power, and the fifth lens also has negative refractive power. Furthermore, the ratio (TTL / 2ImgHT) between the distance (TTL) from the object-side surface of the first lens to the imaging plane and the diagonal length (2ImgHT) of the imaging plane is 0.6 or less.

Description

Technical Field

[0001] Cross-reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0131852 filed on October 5, 2021, in the Korean Intellectual Property Office, and the entire disclosure of the Korean Patent Application is incorporated herein by reference for all purposes. Prior Art

[0003] The following description is related to an imaging lens system that can be installed in a portable electronic device.

[0004] A portable electronic device includes a camera module for capturing images or videos. For example, the camera module can be installed in a mobile phone, a notebook computer, a game console, etc.

[0005] The resolution of a camera module and imaging lens system can be proportional to the size of the sensor and imaging plane. For example, implementing a camera module and imaging lens system with high resolution requires a sensor and imaging plane of considerable size. However, because the size (or length) of the camera module and imaging lens system increases proportionally with the size of the sensor and imaging plane, it is difficult to incorporate a high-resolution camera module and imaging lens system into a thin electronic device such as a smartphone. Summary of the Invention

[0006] This summary is provided to introduce a series of concepts in a simplified form that are further described in the detailed description below. 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.

[0007] In one general aspect, an imaging lens system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, arranged in order from the object side. The fourth lens has negative refractive power, the fifth lens has negative refractive power, and the ratio (TTL / 21mgHT) of the distance (TTL) from the object-side surface of the first lens to an imaging plane to the diagonal length (21mgHT) of the imaging plane is 0.6 or less.

[0008] The fourth lens may include a concave image-side surface.

[0009] The fifth lens may include a convex object-side surface.

[0010] The fifth lens may include a concave image-side surface.

[0011] The sixth lens may have a convex image-side surface.

[0012] The third lens may have positive refractive power.

[0013] The sixth lens may have positive refractive power.

[0014] The imaging lens system may satisfy -4.0 < f2 / f < -1.0, where f is the focal length of the imaging lens system and f2 is the focal length of the second lens.

[0015] The imaging lens system may satisfy 3.0 < f3 / f, where f is the focal length of the imaging lens system and f3 is the focal length of the third lens.

[0016] The imaging lens system may satisfy f4 / f<-3.0, where f is the focal length of the imaging lens system and f4 is the focal length of the fourth lens.

[0017] The imaging lens system may satisfy TTL / f < 1.2, where f is the focal length of the imaging lens system.

[0018] In another general aspect, an imaging lens system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, arranged in order from the object side. The fourth lens includes a concave image-side surface, and a ratio (TTL / 21mgHT) of a distance (TTL) from the object-side surface of the first lens to an imaging plane to a diagonal length (21mgHT) of the imaging plane is 0.6 or less.

[0019] The imaging lens system may satisfy -9.0 < f4 / f < -3.0, where f is the focal length of the imaging lens system, and f4 is the focal length of the fourth lens.

[0020] The imaging lens system may satisfy -5.0 < f5 / f < -1.0, where f is the focal length of the imaging lens system, and f5 is the focal length of the fifth lens.

[0021] The imaging lens system may satisfy 0.84 < D23 / D34 < 0.96, where D23 is the distance from the image-side surface of the second lens to the object-side surface of the third lens, and D34 is the distance from the image-side surface of the third lens to the object-side surface of the fourth lens.

[0022] The imaging lens system may satisfy 0.60 < D56 / D67 < 0.70, where D56 is the distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens, and D67 is the distance from the image-side surface of the sixth lens to the object-side surface of the seventh lens.

[0023] Other features and aspects will become apparent from a review of the following detailed description, drawings, and claims. Simple diagram description

[0024] FIG1 is a block diagram of an imaging lens system according to a first example. FIG. 2 is an aberration curve of the imaging lens system shown in FIG. 1 . FIG3 is a block diagram of an imaging lens system according to a second example. FIG4 is an aberration curve of the imaging lens system shown in FIG3 . FIG5 is a block diagram of an imaging lens system according to a third example. FIG6 is an aberration curve of the imaging lens system shown in FIG5. FIG7 is a block diagram of an imaging lens system according to a fourth example. FIG8 is an aberration curve of the imaging lens system shown in FIG7 . FIG9 is a block diagram of an imaging lens system according to a fifth example. FIG10 is an aberration curve of the imaging lens system shown in FIG9 . FIG11 is a block diagram of an imaging lens system according to a sixth example. FIG12 is an aberration curve of the imaging lens system shown in FIG11. FIG13 is a block diagram of an imaging lens system according to a seventh example. FIG14 is an aberration curve of the imaging lens system shown in FIG13. FIG15 is a block diagram of an imaging lens system according to an eighth example. FIG16 is an aberration curve of the imaging lens system shown in FIG15. Throughout the drawings and detailed description, the same reference numerals refer to the same elements. The drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of the elements in the drawings may be exaggerated for clarity, illustration, and convenience. Implementation Method

[0025] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various variations, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent to those skilled in the art. The order of operations described herein is merely an example and is not intended to limit the order of operations described herein. As will be apparent to those skilled in the art, operations may be modified except for operations that must occur in a specific order. Furthermore, descriptions of functions and structures that are well known to those skilled in the art may be omitted for clarity and brevity.

[0026] The features described herein may be implemented in various forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0027] It should be noted herein that use of the term "may" with respect to an example or embodiment (e.g., with respect to what an example or embodiment may include or implement) means that there is at least one example or embodiment that includes or implements such feature, but all examples and embodiments are not limited thereto.

[0028] 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, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present intervening. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no intervening elements.

[0029] As used herein, the term “and / or” includes any one of the associated listed items or any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are used solely to distinguish between various components, elements, regions, layers, or sections. Therefore, a first component, element, region, layer, or section mentioned in an example described herein could also be referred to as a second component, element, region, layer, or section without departing from the teachings of the examples.

[0031] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being "above" or "upper" relative to another element would now be "below" or "lower" relative to the other element. Thus, the term "above" encompasses both above and below orientations, depending on the spatial orientation of the device. The device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0032] The terminology used herein is for illustrative purposes only and is not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the articles "a," "an," and "the" are intended to include the plural form. The terms "comprises," "includes," and "has" specify the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0033] Due to manufacturing techniques and / or tolerances, the shapes shown in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0034] As will be apparent after understanding the disclosure of this application, the features of the examples described herein can be combined in various ways. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of this application.

[0035] The drawings may not be drawn to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience.

[0036] In the following description, the first lens refers to the lens closest to the object (or subject), and the seventh lens refers to the lens closest to the imaging plane (or image sensor). Radius of curvature, thickness, TTL (the distance from the object-side surface of the first lens to the imaging plane), 2ImgHT (the diagonal length of the imaging plane), ImgHT (half of 2ImgHT), and lens focal length are expressed in millimeters (mm).

[0037] Lens thickness, inter-lens spacing, and TTL (Telephoto Lens Transmitter) are distances from the lens' optical axis. Furthermore, when explaining the shape of each lens, a convex shape on one surface may mean that the paraxial region of the surface is convex, and a concave shape on one surface may mean that the paraxial region of the surface is concave. Therefore, even when one surface of a lens is described as having a convex shape, the edge of the lens may also be concave. Similarly, even when one surface of a lens is described as having a concave shape, the edge of the lens may also be convex.

[0038] The various imaging lens systems described herein can be configured to be installed in portable electronic devices. For example, the imaging lens systems can be installed in smartphones, laptops, augmented reality devices, virtual reality (VR) devices, portable game consoles, and the like. However, the scope of use and examples of the imaging lens systems described herein are not limited to these electronic devices. For example, the optical imaging system can be installed in a narrow space but can be applied to electronic devices requiring high-resolution imaging.

[0039] An imaging lens system according to various embodiments 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, arranged in order from the object side.

[0040] In the imaging lens system, the length of the imaging lens system (the distance from the object-side surface of the first lens to the imaging plane (TTL)) and the diagonal length of the imaging plane (21mgHT) may form a predetermined numerical relationship. For example, in the imaging lens system, TTL / 21mgHT may be 0.6 or less. Furthermore, the imaging lens system may include two or more lenses having negative refractive power. For example, the imaging lens system may include a fourth lens having negative refractive power and a fifth lens having negative refractive power.

[0041] An imaging lens system according to various embodiments 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, arranged in order from the object side. In the imaging lens system, TTL / 2ImgHT is 0.6 or less. Furthermore, the imaging lens system may include a lens having a concave surface. For example, the imaging lens system may include a fourth lens having a concave image-side surface.

[0042] The imaging lens system according to various examples may satisfy at least one of the following conditional expressions. TTL / 2ImgHT ≤ 0.6 0 < f1 / f < 1.8 25 < V1-V2 < 45 V1-V3 < 35 15 < V1-V5 -4.0 < f2 / f < -1.0 3.0 < f3 / f f4 / f < -3.0 -5.0 < f5 / f 0 < f6 / f f7 / f < 0 TTL / f < 1.2 |f1 / f2| < 1.0 -2.0 < f2 / f3 < 0 BFL / f < 0.3 D12 / f < 0.1

[0043] In the above conditional expressions, f is the focal length of the imaging lens system, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, BFL is the distance from the image-side surface of the seventh lens to the imaging plane, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, V5 is the Abbe number of the fifth lens, and D12 is the distance from the image-side surface of the first lens to the object-side surface of the second lens.

[0044] The imaging lens systems according to various examples may satisfy some of the above-described conditional expressions in a more restricted form as follows. 0.5 < TTL / 2ImgHT < 0.6 30 < V1-V3 < 35 30 < V1-V5 < 35 3.0 < f3 / f < 6.0 -9.0 < f4 / f < -3.0 -5.0 < f5 / f < -1.0 0.4 < f6 / f < 1.0 -1.0 < f7 / f < -0.3 1.1 < TTL / f < 1.2 0.1 < |f1 / f2| < 0.4 0.1 < BFL / f < 0.3 0.01 < D12 / f < 0.1

[0045] The imaging lens system according to various examples may satisfy at least one of the following conditional expressions. 0.23 < D12 / D23 < 0.36 0.84 < D23 / D34 < 0.96 D56 / D67 < 0.70

[0046] In the above conditional expressions, D23 is the distance from the image-side surface of the second lens to the object-side surface of the third lens, D34 is the distance from the image-side surface of the third lens to the object-side surface of the fourth lens, D56 is the distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens, and D67 is the distance from the image-side surface of the sixth lens to the object-side surface of the seventh lens.

[0047] If necessary, the imaging lens system according to various examples may include one or more lenses having the following characteristics.

[0048] The first lens has refractive power. The first lens includes 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 high refractive index. For example, the refractive index of the first lens may be lower 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 greater than 50. As a specific example, the Abbe number of the first lens may be greater than 53 and less than 58.

[0049] The second lens has refractive power. The second lens includes a spherical surface or an aspherical surface. For example, both surfaces of the second lens may be aspherical. The second lens may be formed from a material having high light transmittance and excellent workability. For example, the second lens may be formed from a plastic material or a glass material. The second lens may be configured to have a high refractive index. For example, the refractive index of the second lens may be greater than 1.6. As a specific example, the refractive index of the second lens may be greater than 1.65 and less than 1.70. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be less than 30. As a specific example, the Abbe number of the second lens may be greater than 16 and less than 23.

[0050] The third lens has refractive power. 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 from a material having high light transmittance and excellent workability. For example, the third lens may be formed from a plastic material or a glass material. The third lens may be configured to have a high 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 1.67.

[0051] The fourth lens has refractive power. For example, the fourth lens may have negative refractive power. One surface of the fourth lens may be concave. For example, the fourth lens may have a concave image-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 from a material having high light transmittance and excellent workability. For example, the fourth lens may be formed from a plastic material or a glass material. The fourth lens may be configured to have a high 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 30. As a specific example, the Abbe number of the fourth lens may be greater than 16 and less than 23.

[0052] The fifth lens has refractive power. For example, the fifth lens may have negative refractive power. One surface of the fifth lens may be convex. For example, the fifth lens may have a convex object-side surface. One surface of the fifth lens may be concave. For example, the fifth lens may have a concave image-side surface. The fifth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. An inflection point may be formed on one or both surfaces of the fifth lens. For example, the inflection point may be formed on the object-side surface and the image-side surface of the fifth lens. 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 1.56 and less than 1.67. The fifth lens may have a predetermined Abbe number. For example, the Abbe number of the fifth lens may be greater than 20. As another example, the Abbe number of the fifth lens may be greater than 22 and less than 40.

[0053] The sixth lens has refractive power. One surface of the sixth lens may be convex. For example, the sixth lens may have a convex image-side surface. The sixth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. An inflection point may be formed on one or both surfaces of the sixth lens. For example, the 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 from a material having high light transmittance and excellent workability. For example, the sixth lens may be formed from 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 1.60. The sixth lens may have a predetermined Abbe number. For example, the Abbe number of the sixth lens may be greater than 30. As a specific example, the Abbe number of the sixth lens may be greater than 34 and less than 60.

[0054] The seventh lens has refractive power. The seventh lens includes 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, the 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 from a material having high light transmittance and excellent workability. For example, the seventh lens may be formed from 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 50. As a specific example, the Abbe number of the seventh lens may be greater than 53 and less than 60.

[0055] 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 corresponding lenses may be represented by the following equation 1. Equation 1:

[0056] In Equation 1, c is the curvature of the lens surface and is equal to the reciprocal of the radius of curvature of the lens surface at the optical axis of the lens surface, K is the conic constant, Y is the distance from any point on the lens surface to the optical axis of the lens surface in a direction perpendicular to the optical axis of the lens surface, A to H are aspheric constants, and Z (also known as sag) is the distance from a point on the lens surface at a distance from the optical axis Y of the lens surface to a tangent plane perpendicular to the optical axis and intersecting the vertex of the lens surface in a direction parallel to the optical axis of the lens surface.

[0057] The imaging lens system according to various embodiments may further include an aperture and a filter. For example, the imaging lens system may further include an aperture disposed on the object side of the first lens or between lenses. As another example, the imaging lens system may further include a filter disposed between the seventh lens and the imaging plane. The aperture may be configured to adjust the amount of light incident in the direction of the imaging plane, and the filter may block light of specific wavelengths. For reference, the filter described herein is configured to block infrared light, but the wavelengths of light blocked by the filter are not limited to infrared light.

[0058] Hereinafter, imaging lens systems according to various examples will be described with reference to the accompanying drawings.

[0059] First, an imaging lens system according to a first example will be described with reference to FIG. 1 .

[0060] The imaging lens system 100 includes 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 .

[0061] The first lens 110 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 120 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 130 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 140 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 150 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the fifth lens 150. The sixth lens 160 has positive refractive power and has a convex object-side surface and a convex image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the sixth lens 160. The seventh lens 170 has negative refractive power and has a concave object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the seventh lens 170.

[0062] Imaging lens system 100 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens element 170 and imaging plane IP. Imaging plane IP may be formed at a location where light incident from first lens element 110 onto seventh lens element 170 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of a camera module or within image sensor IS.

[0063] The imaging lens system 100 configured as described above exhibits aberration characteristics as shown in Fig. 2. Tables 1 and 2 show the lens characteristics and aspheric surface values ​​of the imaging lens system 100.

[0064] [Table 1] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9113 0.718 1.546 56.0 S2 6.5617 0.060 S3 Second lens 6.0575 0.220 1.689 18.2 S4 3.8485 0.235 S5 The third lens 20.2062 0.307 1.537 55.7 S6 -25.3838 0.250 S7 Fourth lens -35.0542 0.273 1.679 19.2 S8 80.2463 0.373 S9 Fifth lens 15.0035 0.277 1.641 24.0 S10 6.0549 0.339 S11 Sixth lens 7.1176 0.723 1.570 37.4 S12 -3.0458 0.533 S13 Seventh lens -18.9611 0.380 1.537 55.7 S14 1.8285 0.238 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.761 S17 Imaging plane infinity 0.000

[0065] [Table 2] Surface number S1 S2 S3 S4 S5 S6 S7 K -1.99E+00 -4.59E+01 1.53E+01 6.97E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.34E-02 -9.76E-03 -3.72E-02 -1.50E-02 1.31E-02 -3.31E-02 -1.21E-01 Sixth-order coefficient -1.20E-02 2.01E-02 2.36E-02 -4.15E-02 -3.58E-01 7.21E-02 4.93E-01 Eighth-order coefficient 9.00E-02 -2.02E-01 -4.22E-02 4.80E-01 3.50E+00 5.03E-02 -3.25E+00 Tenth-order coefficient -3.36E-01 1.04E+00 4.11E-01 -2.60E+00 -2.25E+01 -2.82E+00 1.40E+01 Twelfth-order coefficient 7.45E-01 -3.05E+00 -1.60E+00 1.01E+01 9.88E+01 1.74E+01 -4.11E+01 Fourteenth-order coefficient -1.07E+00 5.78E+00 3.66E+00 -2.94E+01 -3.06E+02 -5.84E+01 8.42E+01 Sixteenth-order coefficient 9.91E-01 -7.51E+00 -5.63E+00 6.38E+01 6.80E+02 1.27E+02 -1.22E+02 Eighteenth-order coefficient -5.46E-01 6.88E+00 6.13E+00 -1.03E+02 -1.09E+03 -1.90E+02 1.27E+02 Twentieth-order coefficient 1.04E-01 -4.50E+00 -4.81E+00 1.21E+02 1.27E+03 1.98E+02 -9.45E+01 Twenty-second order coefficient 8.18E-02 2.09E+00 2.71E+00 -1.03E+02 -1.05E+03 -1.45E+02 4.95E+01 Twenty-fourth-order coefficient -7.33E-02 -6.68E-01 -1.07E+00 6.07E+01 6.05E+02 7.29E+01 -1.78E+01 Twenty-sixth order coefficient 2.68E-02 1.41E-01 2.80E-01 -2.35E+01 -2.30E+02 -2.38E+01 4.14E+00 Twenty-eighth order coefficient -4.96E-03 -1.75E-02 -4.33E-02 5.37E+00 5.19E+01 4.57E+00 -5.64E-01 Thirty-order coefficient 3.81E-04 9.78E-04 2.99E-03 -5.46E-01 -5.26E+00 -3.89E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 1.67E+01 0.00E+00 6.59E+00 -1.37E+01 1.72E+01 -8.53E+00 Fourth-order coefficients -1.03E-01 -1.50E-01 -1.81E-01 7.36E-03 4.38E-02 -1.56E-01 -1.02E-01 Sixth-order coefficient 3.76E-01 5.31E-03 8.99E-02 -5.25E-02 -3.62E-02 9.81E-02 6.79E-02 Eighth-order coefficient -2.49E+00 2.58E-01 -4.10E-02 6.14E-02 5.19E-02 -4.54E-02 -3.76E-02 Tenth-order coefficient 1.13E+01 -3.31E-01 3.12E-02 -6.09E-02 -5.53E-02 1.49E-02 1.56E-02 Twelfth-order coefficient -3.50E+01 -6.91E-01 -4.14E-02 4.05E-02 3.48E-02 -3.33E-03 -4.80E-03 Fourteenth-order coefficient 7.57E+01 3.35E+00 4.02E-02 -1.82E-02 -1.41E-02 5.10E-04 1.09E-03 Sixteenth-order coefficient -1.17E+02 -6.39E+00 -2.48E-02 5.42E-03 3.91E-03 -5.42E-05 -1.80E-04 Eighteenth-order coefficient 1.30E+02 7.43E+00 1.02E-02 -1.04E-03 -7.52E-04 3.95E-06 2.19E-05 Twentieth-order coefficient -1.04E+02 -5.78E+00 -2.88E-03 1.23E-04 1.01E-04 -1.91E-07 -1.93E-06 Twenty-second order coefficient 5.98E+01 3.07E+00 5.69E-04 -8.10E-06 -9.50E-06 5.50E-09 1.22E-07 Twenty-fourth-order coefficient -2.40E+01 -1.10E+00 -7.70E-05 2.28E-07 6.05E-07 -5.51E-11 -5.32E-09 Twenty-sixth order coefficient 6.34E+00 2.55E-01 6.80E-06 0.00E+00 -2.50E-08 -1.75E-12 1.54E-10 Twenty-eighth order coefficient -9.95E-01 -3.45E-02 -3.53E-07 0.00E+00 6.02E-10 6.29E-14 -2.62E-12 Thirty-order coefficient 7.00E-02 2.07E-03 8.16E-09 0.00E+00 -6.42E-12 -6.05E-16 2.00E-14

[0066] An imaging lens system according to a second example will be described with reference to FIG. 3 .

[0067] The imaging lens system 200 includes 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 .

[0068] The first lens 210 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 220 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 230 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 240 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 250 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 250. The sixth lens 260 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 260. The seventh lens 270 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 270.

[0069] Imaging lens system 200 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens 270 and imaging plane IP. Imaging plane IP may be formed at a location where light from first lens 210 incident on seventh lens 270 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of a camera module or within image sensor IS.

[0070] The imaging lens system 200 configured as described above can exhibit aberration characteristics as shown in Fig. 4. Tables 3 and 4 show the lens characteristics and aspheric values ​​of the imaging lens system 200.

[0071] [Table 3] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9090 0.718 1.546 56.0 S2 6.5707 0.061 S3 Second lens 6.0017 0.220 1.689 18.2 S4 3.8216 0.239 S5 The third lens 20.2062 0.307 1.537 55.7 S6 -25.9245 0.249 S7 Fourth lens -35.0542 0.271 1.679 19.2 S8 87.4355 0.378 S9 Fifth lens 15.0000 0.274 1.641 24.0 S10 5.9264 0.334 S11 Sixth lens 7.1068 0.729 1.570 37.4 S12 -3.0279 0.531 S13 Seventh lens -18.5005 0.380 1.537 55.7 S14 1.8460 0.237 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.763 S17 Imaging plane infinity 0.000

[0072] [Table 4] Surface number S1 S2 S3 S4 S5 S6 S7 K -1.99E+00 -4.64E+01 1.54E+01 7.00E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.29E-02 -1.41E-02 -4.00E-02 -1.82E-02 1.21E-02 -3.27E-02 -1.21E-01 Sixth-order coefficient -5.61E-03 5.21E-02 3.19E-02 -4.39E-03 -3.71E-01 9.19E-02 4.93E-01 Eighth-order coefficient 4.38E-02 -3.45E-01 -3.85E-02 9.74E-02 3.71E+00 -3.71E-01 -3.25E+00 Tenth-order coefficient -1.06E-01 1.47E+00 2.68E-01 6.20E-02 -2.41E+01 5.32E-01 1.40E+01 Twelfth-order coefficient -2.49E-02 -3.93E+00 -9.47E-01 -2.30E+00 1.07E+02 2.13E+00 -4.11E+01 Fourteenth-order coefficient 6.80E-01 7.06E+00 1.95E+00 1.05E+01 -3.31E+02 -1.37E+01 8.42E+01 Sixteenth-order coefficient -1.75E+00 -8.84E+00 -2.63E+00 -2.63E+01 7.36E+02 3.73E+01 -1.22E+02 Eighteenth-order coefficient 2.47E+00 7.91E+00 2.48E+00 4.23E+01 -1.18E+03 -6.31E+01 1.27E+02 Twentieth-order coefficient -2.25E+00 -5.08E+00 -1.67E+00 -4.59E+01 1.37E+03 7.22E+01 -9.45E+01 Twenty-second order coefficient 1.37E+00 2.32E+00 8.16E-01 3.38E+01 -1.13E+03 -5.70E+01 4.95E+01 Twenty-fourth-order coefficient -5.58E-01 -7.37E-01 -2.82E-01 -1.66E+01 6.52E+02 3.09E+01 -1.78E+01 Twenty-sixth order coefficient 1.46E-01 1.54E-01 6.57E-02 5.21E+00 -2.48E+02 -1.10E+01 4.14E+00 Twenty-eighth order coefficient -2.23E-02 -1.91E-02 -9.14E-03 -9.31E-01 5.58E+01 2.35E+00 -5.64E-01 Thirty-order coefficient 1.50E-03 1.06E-03 5.66E-04 7.17E-02 -5.64E+00 -2.29E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 1.19E+01 0.00E+00 6.60E+00 -1.37E+01 1.63E+01 -8.83E+00 Fourth-order coefficients -1.01E-01 -1.55E-01 -1.85E-01 7.14E-03 4.20E-02 -1.57E-01 -9.84E-02 Sixth-order coefficient 3.43E-01 4.35E-02 1.05E-01 -5.15E-02 -3.28E-02 1.03E-01 6.41E-02 Eighth-order coefficient -2.15E+00 8.48E-02 -8.72E-02 5.95E-02 4.87E-02 -5.12E-02 -3.50E-02 Tenth-order coefficient 9.38E+00 1.34E-01 1.09E-01 -5.97E-02 -5.40E-02 1.81E-02 1.43E-02 Twelfth-order coefficient -2.84E+01 -1.52E+00 -1.24E-01 4.03E-02 3.47E-02 -4.33E-03 -4.40E-03 Fourteenth-order coefficient 6.06E+01 4.37E+00 9.87E-02 -1.83E-02 -1.43E-02 7.20E-04 1.00E-03 Sixteenth-order coefficient -9.28E+01 -7.30E+00 -5.37E-02 5.51E-03 4.02E-03 -8.48E-05 -1.69E-04 Eighteenth-order coefficient 1.03E+02 8.04E+00 2.03E-02 -1.06E-03 -7.84E-04 7.15E-06 2.07E-05 Twentieth-order coefficient -8.28E+01 -6.08E+00 -5.43E-03 1.26E-04 1.07E-04 -4.32E-07 -1.85E-06 Twenty-second order coefficient 4.77E+01 3.17E+00 1.03E-03 -8.34E-06 -1.01E-05 1.85E-08 1.18E-07 Twenty-fourth-order coefficient -1.92E+01 -1.13E+00 -1.34E-04 2.35E-07 6.53E-07 -5.44E-10 -5.21E-09 Twenty-sixth order coefficient 5.10E+00 2.60E-01 1.14E-05 0.00E+00 -2.72E-08 1.05E-11 1.52E-10 Twenty-eighth order coefficient -8.04E-01 -3.51E-02 -5.77E-07 0.00E+00 6.63E-10 -1.20E-13 -2.61E-12 Thirty-order coefficient 5.69E-02 2.10E-03 1.30E-08 0.00E+00 -7.16E-12 6.31E-16 2.01E-14

[0073] An imaging lens system according to a third example will be described with reference to FIG. 5 .

[0074] The imaging lens system 300 includes 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 .

[0075] The first lens 310 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 320 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 330 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 340 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 350 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 350. The sixth lens 360 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 360. The seventh lens 370 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 370.

[0076] Imaging lens system 300 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens 370 and imaging plane IP. Imaging plane IP may be formed at a location where light incident from first lens 310 onto seventh lens 370 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of the camera module or within image sensor IS.

[0077] The imaging lens system 300 configured as described above can exhibit aberration characteristics as shown in Fig. 6. Tables 5 and 6 show the lens characteristics and aspheric values ​​of the imaging lens system 300.

[0078] [Table 5] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9099 0.682 1.546 56.0 S2 6.9800 0.089 S3 Second lens 6.1887 0.200 1.679 19.2 S4 3.7150 0.257 S5 The third lens 20.2062 0.319 1.537 55.7 S6 -21.9351 0.299 S7 Fourth lens -24.8862 0.246 1.679 19.2 S8 38.0041 0.372 S9 Fifth lens 5.0941 0.240 1.641 24.0 S10 3.6229 0.354 S11 Sixth lens 7.1297 0.747 1.570 37.4 S12 -2.9000 0.534 S13 Seventh lens -16.8606 0.380 1.537 55.7 S14 1.7878 0.225 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.745 S17 Imaging plane infinity 0.000

[0079] [Table 6] Surface number S1 S2 S3 S4 S5 S6 S7 K -2.09E+00 -5.26E+01 1.60E+01 6.77E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 2.53E-02 -2.23E-02 -4.46E-02 -4.44E-02 -9.60E-03 -8.12E-03 -8.60E-02 Sixth-order coefficient 8.40E-02 1.30E-01 -2.93E-02 1.68E-01 -1.35E-02 -2.74E-01 -1.30E-01 Eighth-order coefficient -4.42E-01 -7.06E-01 7.89E-01 -5.40E-01 -1.67E-01 2.76E+00 1.72E+00 Tenth-order coefficient 1.50E+00 2.53E+00 -4.72E+00 -7.18E-01 2.01E+00 -1.71E+01 -1.09E+01 Twelfth-order coefficient -3.49E+00 -6.09E+00 1.73E+01 1.64E+01 -1.06E+01 7.08E+01 4.21E+01 Fourteenth-order coefficient 5.76E+00 1.02E+01 -4.22E+01 -7.86E+01 3.56E+01 -2.06E+02 -1.09E+02 Sixteenth-order coefficient -6.94E+00 -1.22E+01 7.14E+01 2.13E+02 -8.30E+01 4.33E+02 1.99E+02 Eighteenth-order coefficient 6.18E+00 1.05E+01 -8.50E+01 -3.76E+02 1.40E+02 -6.65E+02 -2.56E+02 Twentieth-order coefficient -4.07E+00 -6.57E+00 7.17E+01 4.53E+02 -1.70E+02 7.45E+02 2.36E+02 Twenty-second order coefficient 1.95E+00 2.94E+00 -4.25E+01 -3.76E+02 1.48E+02 -6.02E+02 -1.53​​E+02 Twenty-fourth-order coefficient -6.66E-01 -9.23E-01 1.73E+01 2.12E+02 -9.00E+01 3.41E+02 6.87E+01 Twenty-sixth order coefficient 1.52E-01 1.92E-01 -4.61E+00 -7.77E+01 3.62E+01 -1.28E+02 -2.01E+01 Twenty-eighth order coefficient -2.08E-02 -2.39E-02 7.21E-01 1.67E+01 -8.62E+00 2.88E+01 3.45E+00 Thirty-order coefficient 1.29E-03 1.34E-03 -5.03E-02 -1.59E+00 9.21E-01 -2.91E+00 -2.64E-01 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 -3.52E+01 0.00E+00 6.36E+00 -1.45E+01 1.47E+01 -8.68E+00 Fourth-order coefficients -1.12E-01 -1.77E-01 -2.29E-01 -2.73E-03 1.08E-02 -1.95E-01 -1.16E-01 Sixth-order coefficient 2.22E-01 9.42E-02 1.15E-01 -4.52E-02 -1.52E-02 1.25E-01 7.73E-02 Eighth-order coefficient -1.18E+00 3.25E-02 -3.69E-03 6.47E-02 3.88E-02 -5.34E-02 -3.98E-02 Tenth-order coefficient 5.31E+00 -6.85E-02 -1.02E-01 -6.50E-02 -3.72E-02 1.66E-02 1.53E-02 Twelfth-order coefficient -1.73E+01 -3.24E-01 1.27E-01 4.14E-02 1.92E-02 -3.78E-03 -4.36E-03 Fourteenth-order coefficient 3.93E+01 1.22E+00 -7.42E-02 -1.76E-02 -6.38E-03 6.34E-04 9.22E-04 Sixteenth-order coefficient -6.35E+01 -2.11E+00 1.60E-02 4.97E-03 1.46E-03 -7.89E-05 -1.44E-04 Eighteenth-order coefficient 7.34E+01 2.31E+00 6.64E-03 -9.05E-04 -2.36E-04 7.34E-06 1.64E-05 Twentieth-order coefficient -6.08E+01 -1.73E+00 -6.14E-03 1.02E-04 2.70E-05 -5.10E-07 -1.38E-06 Twenty-second order coefficient 3.58E+01 8.96E-01 2.15E-03 -6.39E-06 -2.18E-06 2.61E-08 8.34E-08 Twenty-fourth-order coefficient -1.46E+01 -3.18E-01 -4.30E-04 1.72E-07 1.20E-07 -9.65E-10 -3.55E-09 Twenty-sixth order coefficient 3.91E+00 7.36E-02 5.10E-05 0.00E+00 -4.30E-09 2.44E-11 1.00E-10 Twenty-eighth order coefficient -6.19E-01 -1.00E-02 -3.37E-06 0.00E+00 9.01E-11 -3.78E-13 -1.69E-12 Thirty-order coefficient 4.37E-02 6.03E-04 9.54E-08 0.00E+00 -8.36E-13 2.72E-15 1.29E-14

[0080] An imaging lens system according to a fourth example will be described with reference to FIG. 7 .

[0081] The imaging lens system 400 includes 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 .

[0082] The first lens 410 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 420 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 430 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 440 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 450 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 450. The sixth lens 460 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 460. The seventh lens 470 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 470.

[0083] Imaging lens system 400 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens 470 and imaging plane IP. Imaging plane IP may be formed at a location where light incident from first lens 410 onto seventh lens 470 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of the camera module or within image sensor IS.

[0084] The imaging lens system 400 configured as described above can exhibit aberration characteristics as shown in Fig. 8. Tables 7 and 8 show the lens characteristics and aspheric values ​​of the imaging lens system 400.

[0085] [Table 7] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9086 0.716 1.546 56.0 S2 6.5538 0.060 S3 Second lens 6.0211 0.220 1.689 18.2 S4 3.8292 0.238 S5 The third lens 20.2062 0.308 1.537 55.7 S6 -25.3303 0.251 S7 Fourth lens -35.0542 0.272 1.679 19.2 S8 84.1481 0.375 S9 Fifth lens 15.0000 0.275 1.641 24.0 S10 5.9721 0.336 S11 Sixth lens 7.1084 0.730 1.570 37.4 S12 -3.0370 0.530 S13 Seventh lens -18.7640 0.380 1.537 55.7 S14 1.8394 0.237 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.763 S17 Imaging plane infinity 0.000

[0086] [Table 8] Surface number S1 S2 S3 S4 S5 S6 S7 K -2.00E+00 -4.66E+01 1.54E+01 7.00E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.64E-02 -1.13E-02 -3.94E-02 -1.70E-02 1.39E-02 -3.37E-02 -1.21E-01 Sixth-order coefficient -4.18E-02 3.28E-02 2.62E-02 -2.95E-02 -3.88E-01 9.29E-02 4.93E-01 Eighth-order coefficient 2.72E-01 -2.51E-01 -5.69E-03 3.69E-01 3.86E+00 -2.29E-01 -3.25E+00 Tenth-order coefficient -1.01E+00 1.17E+00 1.31E-01 -1.80E+00 -2.51E+01 -9.72E-01 1.40E+01 Twelfth-order coefficient 2.40E+00 -3.28E+00 -5.61E-01 6.11E+00 1.12E+02 1.03E+01 -4.11E+01 Fourteenth-order coefficient -3.86E+00 6.06E+00 1.19E+00 -1.57E+01 -3.51E+02 -4.18E+01 8.42E+01 Sixteenth-order coefficient 4.31E+00 -7.76E+00 -1.58E+00 3.11E+01 7.85E+02 1.03E+02 -1.22E+02 Eighteenth-order coefficient -3.38E+00 7.06E+00 1.44E+00 -4.77E+01 -1.27E+03 -1.71E+02 1.27E+02 Twentieth-order coefficient 1.85E+00 -4.60E+00 -9.36E-01 5.54E+01 1.48E+03 1.98E+02 -9.45E+01 Twenty-second order coefficient -6.81E-01 2.13E+00 4.46E-01 -4.73E+01 -1.23E+03 -1.59E+02 4.95E+01 Twenty-fourth-order coefficient 1.58E-01 -6.83E-01 -1.54E-01 2.84E+01 7.09E+02 8.80E+01 -1.78E+01 Twenty-sixth order coefficient -1.94E-02 1.45E-01 3.66E-02 -1.12E+01 -2.70E+02 -3.19E+01 4.14E+00 Twenty-eighth order coefficient 4.73E-04 -1.81E-02 -5.24E-03 2.63E+00 6.10E+01 6.80E+00 -5.64E-01 Thirty-order coefficient 9.68E-05 1.02E-03 3.30E-04 -2.73E-01 -6.17E+00 -6.48E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 1.58E+01 0.00E+00 6.60E+00 -1.37E+01 1.66E+01 -8.71E+00 Fourth-order coefficients -9.76E-02 -1.52E-01 -1.83E-01 7.28E-03 4.29E-02 -1.57E-01 -9.80E-02 Sixth-order coefficient 3.13E-01 3.22E-02 9.49E-02 -5.25E-02 -3.36E-02 1.02E-01 6.25E-02 Eighth-order coefficient -2.03E+00 1.03E-01 -6.00E-02 6.12E-02 4.92E-02 -4.99E-02 -3.31E-02 Tenth-order coefficient 9.13E+00 1.63E-01 6.92E-02 -6.07E-02 -5.35E-02 1.72E-02 1.32E-02 Twelfth-order coefficient -2.83E+01 -1.70E+00 -8.67E-02 4.04E-02 3.38E-02 -4.02E-03 -3.97E-03 Fourteenth-order coefficient 6.12E+01 4.75E+00 7.52E-02 -1.82E-02 -1.38E-02 6.48E-04 8.96E-04 Sixteenth-order coefficient -9.47E+01 -7.76E+00 -4.31E-02 5.45E-03 3.81E-03 -7.34E-05 -1.50E-04 Eighteenth-order coefficient 1.06E+02 8.42E+00 1.69E-02 -1.05E-03 -7.34E-04 5.89E-06 1.85E-05 Twentieth-order coefficient -8.58E+01 -6.29E+00 -4.62E-03 1.24E-04 9.89E-05 -3.33E-07 -1.66E-06 Twenty-second order coefficient 4.98E+01 3.26E+00 8.84E-04 -8.20E-06 -9.27E-06 1.30E-08 1.06E-07 Twenty-fourth-order coefficient -2.01E+01 -1.15E+00 -1.16E-04 2.31E-07 5.91E-07 -3.32E-10 -4.72E-09 Twenty-sixth order coefficient 5.37E+00 2.64E-01 9.99E-06 0.00E+00 -2.44E-08 5.08E-12 1.38E-10 Twenty-eighth order coefficient -8.51E-01 -3.55E-02 -5.06E-07 0.00E+00 5.89E-10 -3.80E-14 -2.39E-12 Thirty-order coefficient 6.04E-02 2.12E-03 1.14E-08 0.00E+00 -6.29E-12 7.14E-17 1.84E-14

[0087] An imaging lens system according to a fifth example will be described with reference to FIG. 9 .

[0088] The imaging lens system 500 includes 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 .

[0089] The first lens 510 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 520 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 530 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 540 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 550 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 550. The sixth lens 560 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 560. The seventh lens 570 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 570.

[0090] Imaging lens system 500 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens element 570 and imaging plane IP. Imaging plane IP may be formed at a location where light incident from first lens element 510 onto seventh lens element 570 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of a camera module or within image sensor IS.

[0091] The imaging lens system 500 configured as described above can exhibit aberration characteristics as shown in Fig. 10. Tables 9 and 10 show the lens characteristics and aspheric values ​​of the imaging lens system 500.

[0092] [Table 9] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9053 0.710 1.546 56.1 S2 6.5067 0.061 S3 Second lens 6.0206 0.220 1.689 18.2 S4 3.8302 0.237 S5 The third lens 19.9000 0.308 1.642 23.9 S6 -25.4380 0.254 S7 Fourth lens -35.0542 0.273 1.680 19.2 S8 74.1564 0.372 S9 Fifth lens 15.0000 0.280 1.571 37.4 S10 6.0398 0.338 S11 Sixth lens 7.1129 0.726 1.547 56.1 S12 -3.0490 0.531 S13 Seventh lens -19.0428 0.380 1.547 56.1 S14 1.8410 0.237 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.763 S17 Imaging plane infinity 0.000

[0093] [Table 10] Surface number S1 S2 S3 S4 S5 S6 S7 K -2.01E+00 -4.70E+01 1.54E+01 7.00E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.73E-02 -1.03E-02 -4.00E-02 -1.73E-02 1.39E-02 -3.33E-02 -1.21E-01 Sixth-order coefficient -4.74E-02 2.84E-02 3.39E-02 -3.27E-02 -3.83E-01 8.96E-02 4.93E-01 Eighth-order coefficient 3.12E-01 -2.17E-01 -6.30E-02 4.53E-01 3.76E+00 -1.69E-01 -3.25E+00 Tenth-order coefficient -1.20E+00 1.00E+00 3.90E-01 -2.62E+00 -2.41E+01 -1.42E+00 1.40E+01 Twelfth-order coefficient 2.97E+00 -2.83E+00 -1.38E+00 1.06E+01 1.06E+02 1.22E+01 -4.11E+01 Fourteenth-order coefficient -5.04E+00 5.24E+00 3.02E+00 -3.13E+01 -3.27E+02 -4.66E+01 8.42E+01 Sixteenth-order coefficient 6.06E+00 -6.74E+00 -4.49E+00 6.82E+01 7.24E+02 1.11E+02 -1.22E+02 Eighteenth-order coefficient -5.23E+00 6.17E+00 4.74E+00 -1.10E+02 -1.16E+03 -1.78E+02 1.27E+02 Twentieth-order coefficient 3.25E+00 -4.05E+00 -3.61E+00 1.28E+02 1.34E+03 1.98E+02 -9.45E+01 Twenty-second order coefficient -1.43E+00 1.89E+00 1.97E+00 -1.08E+02 -1.10E+03 -1.53​​E+02 4.95E+01 Twenty-fourth-order coefficient 4.39E-01 -6.12E-01 -7.52E-01 6.29E+01 6.32E+02 8.07E+01 -1.78E+01 Twenty-sixth order coefficient -8.82E-02 1.31E-01 1.89E-01 -2.41E+01 -2.39E+02 -2.76E+01 4.14E+00 Twenty-eighth order coefficient 1.04E-02 -1.66E-02 -2.81E-02 5.47E+00 5.36E+01 5.50E+00 -5.64E-01 Thirty-order coefficient -5.49E-04 9.40E-04 1.85E-03 -5.52E-01 -5.39E+00 -4.83E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 1.67E+01 0.00E+00 6.59E+00 -1.37E+01 1.72E+01 -8.75E+00 Fourth-order coefficients -9.93E-02 -1.54E-01 -1.82E-01 6.30E-03 4.31E-02 -1.55E-01 -9.56E-02 Sixth-order coefficient 3.37E-01 6.30E-02 9.72E-02 -4.96E-02 -3.23E-02 9.96E-02 5.93E-02 Eighth-order coefficient -2.23E+00 -7.30E-02 -6.87E-02 5.61E-02 4.61E-02 -4.76E-02 -3.07E-02 Tenth-order coefficient 1.02E+01 7.82E-01 8.48E-02 -5.47E-02 -4.96E-02 1.61E-02 1.21E-02 Twelfth-order coefficient -3.16E+01 -3.16E+00 -1.03E-01 3.60E-02 3.09E-02 -3.68E-03 -3.62E-03 Fourteenth-order coefficient 6.87E+01 7.16E+00 8.69E-02 -1.62E-02 -1.24E-02 5.80E-04 8.23E-04 Sixteenth-order coefficient -1.06E+02 -1.06E+01 -4.86E-02 4.87E-03 3.41E-03 -6.40E-05 -1.39E-04 Eighteenth-order coefficient 1.19E+02 1.09E+01 1.86E-02 -9.43E-04 -6.49E-04 4.94E-06 1.73E-05 Twentieth-order coefficient -9.61E+01 -7.83E+00 -4.99E-03 1.12E-04 8.66E-05 -2.64E-07 -1.56E-06 Twenty-second order coefficient 5.56E+01 3.94E+00 9.36E-04 -7.43E-06 -8.03E-06 9.37E-09 1.01E-07 Twenty-fourth-order coefficient -2.24E+01 -1.36E+00 -1.21E-04 2.10E-07 5.07E-07 -2.00E-10 -4.50E-09 Twenty-sixth order coefficient 5.97E+00 3.08E-01 1.02E-05 0.00E+00 -2.07E-08 1.85E-12 1.32E-10 Twenty-eighth order coefficient -9.43E-01 -4.09E-02 -5.07E-07 0.00E+00 4.93E-10 9.28E-15 -2.29E-12 Thirty-order coefficient 6.68E-02 2.42E-03 1.13E-08 0.00E+00 -5.21E-12 -2.43E-16 1.77E-14

[0094] An imaging lens system according to a sixth example will be described with reference to FIG. 11 .

[0095] The imaging lens system 600 includes 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 .

[0096] The first lens 610 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 620 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 630 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 640 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 650 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the fifth lens 650. The sixth lens 660 has positive refractive power and has a convex object-side surface and a convex image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the sixth lens 660. The seventh lens 670 has negative refractive power and has a concave object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the seventh lens 670.

[0097] Imaging lens system 600 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens 670 and imaging plane IP. Imaging plane IP may be formed at a location where light from first lens 610 incident on seventh lens 670 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of the camera module or within image sensor IS.

[0098] The imaging lens system 600 configured as described above can exhibit aberration characteristics as shown in Fig. 12. Tables 11 and 12 show the lens characteristics and aspheric values ​​of the imaging lens system 600.

[0099] [Table 11] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9039 0.707 1.546 56.1 S2 6.4826 0.061 S3 Second lens 6.0171 0.220 1.689 18.2 S4 3.8262 0.236 S5 The third lens 19.5000 0.308 1.642 23.9 S6 -25.5930 0.255 S7 Fourth lens -35.0542 0.274 1.680 19.2 S8 70.3150 0.370 S9 Fifth lens 15.0000 0.281 1.571 37.4 S10 6.0708 0.340 S11 Sixth lens 7.1151 0.725 1.547 56.1 S12 -3.0552 0.531 S13 Seventh lens -19.1881 0.380 1.547 56.1 S14 1.8409 0.237 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.763 S17 Imaging plane infinity 0.000

[0100] [Table 12] Surface number S1 S2 S3 S4 S5 S6 S7 K -2.02E+00 -4.71E+01 1.54E+01 7.00E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.79E-02 -9.25E-03 -3.98E-02 -1.72E-02 1.23E-02 -3.30E-02 -1.21E-01 Sixth-order coefficient -5.08E-02 1.79E-02 2.88E-02 -3.66E-02 -3.57E-01 9.89E-02 4.93E-01 Eighth-order coefficient 3.30E-01 -1.54E-01 -3.27E-02 4.93E-01 3.51E+00 -3.34E-01 -3.25E+00 Tenth-order coefficient -1.26E+00 7.73E-01 2.98E-01 -2.88E+00 -2.26E+01 -1.88E-02 1.40E+01 Twelfth-order coefficient 3.12E+00 -2.27E+00 -1.24E+00 1.18E+01 9.94E+01 4.92E+00 -4.11E+01 Fourteenth-order coefficient -5.30E+00 4.32E+00 2.98E+00 -3.52E+01 -3.09E+02 -2.15E+01 8.42E+01 Sixteenth-order coefficient 6.39E+00 -5.66E+00 -4.78E+00 7.76E+01 6.86E+02 5.05E+01 -1.22E+02 Eighteenth-order coefficient -5.55E+00 5.26E+00 5.39E+00 -1.25E+02 -1.10E+03 -7.49E+01 1.27E+02 Twentieth-order coefficient 3.48E+00 -3.50E+00 -4.33E+00 1.48E+02 1.28E+03 7.26E+01 -9.45E+01 Twenty-second order coefficient -1.56E+00 1.65E+00 2.47E+00 -1.24E+02 -1.06E+03 -4.51E+01 4.95E+01 Twenty-fourth-order coefficient 4.86E-01 -5.42E-01 -9.77E-01 7.28E+01 6.10E+02 1.63E+01 -1.78E+01 Twenty-sixth order coefficient -1.00E-01 1.17E-01 2.53E-01 -2.80E+01 -2.32E+02 -2.30E+00 4.14E+00 Twenty-eighth order coefficient 1.22E-02 -1.50E-02 -3.85E-02 6.34E+00 5.21E+01 -3.82E-01 -5.64E-01 Thirty-order coefficient -6.71E-04 8.58E-04 2.59E-03 -6.41E-01 -5.26E+00 1.31E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 1.92E+01 0.00E+00 6.59E+00 -1.36E+01 1.73E+01 -8.68E+00 Fourth-order coefficients -1.02E-01 -1.55E-01 -1.82E-01 6.62E-03 4.41E-02 -1.54E-01 -9.57E-02 Sixth-order coefficient 3.56E-01 6.23E-02 9.78E-02 -5.15E-02 -3.41E-02 9.77E-02 5.90E-02 Eighth-order coefficient -2.34E+00 -4.58E-02 -6.90E-02 6.00E-02 4.81E-02 -4.58E-02 -3.03E-02 Tenth-order coefficient 1.06E+01 6.47E-01 8.55E-02 -5.87E-02 -5.07E-02 1.52E-02 1.18E-02 Twelfth-order coefficient -3.29E+01 -2.80E+00 -1.05E-01 3.85E-02 3.12E-02 -3.42E-03 -3.52E-03 Fourteenth-order coefficient 7.13E+01 6.57E+00 8.91E-02 -1.72E-02 -1.24E-02 5.29E-04 7.95E-04 Sixteenth-order coefficient -1.10E+02 -9.97E+00 -5.01E-02 5.12E-03 3.36E-03 -5.68E-05 -1.34E-04 Eighteenth-order coefficient 1.23E+02 1.04E+01 1.93E-02 -9.86E-04 -6.35E-04 4.23E-06 1.66E-05 Twentieth-order coefficient -9.99E+01 -7.58E+00 -5.17E-03 1.17E-04 8.40E-05 -2.13E-07 -1.49E-06 Twenty-second order coefficient 5.78E+01 3.87E+00 9.68E-04 -7.72E-06 -7.73E-06 6.69E-09 9.60E-08 Twenty-fourth-order coefficient -2.33E+01 -1.35E+00 -1.24E-04 2.18E-07 4.84E-07 -1.01E-10 -4.28E-09 Twenty-sixth order coefficient 6.21E+00 3.08E-01 1.05E-05 0.00E+00 -1.96E-08 -5.52E-13 1.25E-10 Twenty-eighth order coefficient -9.82E-01 -4.12E-02 -5.18E-07 0.00E+00 4.65E-10 4.43E-14 -2.17E-12 Thirty-order coefficient 6.96E-02 2.45E-03 1.15E-08 0.00E+00 -4.87E-12 -4.74E-16 1.68E-14

[0101] An imaging lens system according to a seventh example will be described with reference to FIG. 13 .

[0102] The imaging lens system 700 includes 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 .

[0103] The first lens 710 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 720 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 730 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 740 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 750 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 750. The sixth lens 760 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 760. The seventh lens 770 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 770.

[0104] The imaging lens system 700 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between the seventh lens 770 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 710 to the seventh lens 770 is formed. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module or within the image sensor IS.

[0105] The imaging lens system 700 configured as described above can exhibit aberration characteristics as shown in Fig. 14. Tables 13 and 14 show the lens characteristics and aspheric values ​​of the imaging lens system 700.

[0106] [Table 13] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9018 0.709 1.546 56.0 S2 6.4346 0.059 S3 Second lens 5.8971 0.210 1.689 18.2 S4 3.7949 0.240 S5 The third lens 19.0000 0.306 1.537 55.7 S6 -28.2273 0.254 S7 Fourth lens -40.0000 0.276 1.679 19.2 S8 61.3154 0.371 S9 Fifth lens 15.0000 0.283 1.641 24.0 S10 6.0339 0.339 S11 Sixth lens 7.0927 0.725 1.570 37.4 S12 -3.0798 0.532 S13 Seventh lens -19.3890 0.385 1.537 55.7 S14 1.8550 0.238 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.762 S17 Imaging plane infinity 0.000

[0107] [Table 14] Surface number S1 S2 S3 S4 S5 S6 S7 K -2.00E+00 -4.63E+01 1.48E+01 6.87E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.79E-02 -9.25E-03 -4.04E-02 -1.74E-02 1.24E-02 -3.35E-02 -1.21E-01 Sixth-order coefficient -5.08E-02 1.79E-02 2.94E-02 -3.71E-02 -3.60E-01 1.01E-01 4.93E-01 Eighth-order coefficient 3.29E-01 -1.54E-01 -3.36E-02 5.01E-01 3.55E+00 -3.44E-01 -3.25E+00 Tenth-order coefficient -1.26E+00 7.74E-01 3.08E-01 -2.93E+00 -2.29E+01 -1.95E-02 1.40E+01 Twelfth-order coefficient 3.11E+00 -2.27E+00 -1.29E+00 1.20E+01 1.01E+02 5.15E+00 -4.11E+01 Fourteenth-order coefficient -5.28E+00 4.32E+00 3.13E+00 -3.62E+01 -3.15E+02 -2.27E+01 8.42E+01 Sixteenth-order coefficient 6.37E+00 -5.66E+00 -5.05E+00 8.00E+01 7.02E+02 5.36E+01 -1.22E+02 Eighteenth-order coefficient -5.53E+00 5.26E+00 5.72E+00 -1.30E+02 -1.13E+03 -8.00E+01 1.27E+02 Twentieth-order coefficient 3.46E+00 -3.50E+00 -4.63E+00 1.54E+02 1.31E+03 7.81E+01 -9.45E+01 Twenty-second order coefficient -1.55E+00 1.65E+00 2.66E+00 -1.30E+02 -1.09E+03 -4.89E+01 4.95E+01 Twenty-fourth-order coefficient 4.83E-01 -5.43E-01 -1.06E+00 7.63E+01 6.30E+02 1.78E+01 -1.78E+01 Twenty-sixth order coefficient -9.95E-02 1.17E-01 2.76E-01 -2.94E+01 -2.40E+02 -2.53E+00 4.14E+00 Twenty-eighth order coefficient 1.22E-02 -1.50E-02 -4.23E-02 6.70E+00 5.41E+01 -4.23E-01 -5.64E-01 Thirty-order coefficient -6.66E-04 8.60E-04 2.87E-03 -6.79E-01 -5.47E+00 1.46E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 2.22E+01 0.00E+00 6.54E+00 -1.35E+01 1.78E+01 -8.70E+00 Fourth-order coefficients -1.02E-01 -1.56E-01 -1.82E-01 6.63E-03 4.41E-02 -1.54E-01 -9.55E-02 Sixth-order coefficient 3.55E-01 6.29E-02 9.79E-02 -5.15E-02 -3.42E-02 9.72E-02 5.88E-02 Eighth-order coefficient -2.33E+00 -4.63E-02 -6.92E-02 6.02E-02 4.81E-02 -4.55E-02 -3.01E-02 Tenth-order coefficient 1.06E+01 6.56E-01 8.57E-02 -5.89E-02 -5.07E-02 1.51E-02 1.17E-02 Twelfth-order coefficient -3.28E+01 -2.85E+00 -1.06E-01 3.86E-02 3.12E-02 -3.39E-03 -3.49E-03 Fourteenth-order coefficient 7.11E+01 6.70E+00 8.93E-02 -1.72E-02 -1.24E-02 5.23E-04 7.87E-04 Sixteenth-order coefficient -1.10E+02 -1.02E+01 -5.03E-02 5.14E-03 3.37E-03 -5.61E-05 -1.32E-04 Eighteenth-order coefficient 1.23E+02 1.07E+01 1.93E-02 -9.91E-04 -6.36E-04 4.17E-06 1.64E-05 Twentieth-order coefficient -9.96E+01 -7.80E+00 -5.19E-03 1.17E-04 8.41E-05 -2.09E-07 -1.47E-06 Twenty-second order coefficient 5.76E+01 3.99E+00 9.73E-04 -7.78E-06 -7.75E-06 6.57E-09 9.44E-08 Twenty-fourth-order coefficient -2.32E+01 -1.40E+00 -1.25E-04 2.20E-07 4.85E-07 -9.93E-11 -4.20E-09 Twenty-sixth order coefficient 6.19E+00 3.20E-01 1.05E-05 0.00E+00 -1.97E-08 -5.41E-13 1.23E-10 Twenty-eighth order coefficient -9.78E-01 -4.29E-02 -5.21E-07 0.00E+00 4.66E-10 4.33E-14 -2.12E-12 Thirty-order coefficient 6.92E-02 2.56E-03 1.15E-08 0.00E+00 -4.88E-12 -4.63E-16 1.64E-14

[0108] An imaging lens system according to an eighth example will be described with reference to FIG. 15 .

[0109] The imaging lens system 800 includes a first lens 810 , a second lens 820 , a third lens 830 , a fourth lens 840 , a fifth lens 850 , a sixth lens 860 , and a seventh lens 870 .

[0110] The first lens 810 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 820 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 830 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 840 has negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 850 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the fifth lens 850. The sixth lens 860 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 860. The seventh lens 870 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 870.

[0111] Imaging lens system 800 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between seventh lens 870 and imaging plane IP. Imaging plane IP may be formed at a location where light from first lens 810 incident on seventh lens 870 is formed. For example, imaging plane IP may be formed on a surface of image sensor IS of the camera module or within image sensor IS.

[0112] The imaging lens system 800 configured as described above can exhibit aberration characteristics as shown in Fig. 16. Tables 15 and 16 show the lens characteristics and aspheric values ​​of the imaging lens system 800.

[0113] [Table 15] Surface number Reference Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 1.9033 0.715 1.546 56.1 S2 6.3938 0.057 S3 Second lens 5.7866 0.200 1.689 18.2 S4 3.7699 0.243 S5 The third lens 18.0000 0.304 1.642 23.9 S6 -32.2422 0.256 S7 Fourth lens -45.0000 0.276 1.680 19.2 S8 56.4577 0.370 S9 Fifth lens 15.0000 0.284 1.571 37.4 S10 5.9889 0.338 S11 Sixth lens 7.0529 0.725 1.547 56.1 S12 -3.0942 0.534 S13 Seventh lens -19.6424 0.388 1.547 56.1 S14 1.8585 0.260 S15 filter infinity 0.110 1.519 64.2 S16 infinity 0.740 S17 Imaging plane infinity -0.011

[0114] [Table 16] Surface number S1 S2 S3 S4 S5 S6 S7 K -1.97E+00 -4.52E+01 1.41E+01 6.66E+00 -1.00E+00 -1.00E+00 -1.00E+00 Fourth-order coefficients 3.74E-02 -9.14E-03 -4.06E-02 -1.73E-02 1.24E-02 -3.37E-02 -1.21E-01 Sixth-order coefficient -4.98E-02 1.75E-02 2.96E-02 -3.69E-02 -3.57E-01 1.02E-01 4.93E-01 Eighth-order coefficient 3.21E-01 -1.51E-01 -3.39E-02 4.99E-01 3.52E+00 -3.47E-01 -3.25E+00 Tenth-order coefficient -1.22E+00 7.50E-01 3.12E-01 -2.91E+00 -2.26E+01 -1.97E-02 1.40E+01 Twelfth-order coefficient 3.00E+00 -2.19E+00 -1.31E+00 1.20E+01 9.98E+01 5.22E+00 -4.11E+01 Fourteenth-order coefficient -5.06E+00 4.14E+00 3.18E+00 -3.59E+01 -3.10E+02 -2.30E+01 8.42E+01 Sixteenth-order coefficient 6.06E+00 -5.39E+00 -5.15E+00 7.93E+01 6.90E+02 5.45E+01 -1.22E+02 Eighteenth-order coefficient -5.23E+00 4.98E+00 5.85E+00 -1.29E+02 -1.11E+03 -8.16E+01 1.27E+02 Twentieth-order coefficient 3.26E+00 -3.29E+00 -4.75E+00 1.52E+02 1.29E+03 7.99E+01 -9.45E+01 Twenty-second order coefficient -1.45E+00 1.54E+00 2.74E+00 -1.28E+02 -1.07E+03 -5.01E+01 4.95E+01 Twenty-fourth-order coefficient 4.49E-01 -5.03E-01 -1.09E+00 7.52E+01 6.14E+02 1.83E+01 -1.78E+01 Twenty-sixth order coefficient -9.19E-02 1.08E-01 2.85E-01 -2.90E+01 -2.33E+02 -2.60E+00 4.14E+00 Twenty-eighth order coefficient 1.11E-02 -1.38E-02 -4.38E-02 6.59E+00 5.25E+01 -4.37E-01 -5.64E-01 Thirty-order coefficient -6.07E-04 7.83E-04 2.97E-03 -6.67E-01 -5.30E+00 1.51E-01 3.40E-02 Surface number S8 S9 S10 S11 S12 S13 S14 K 0.00E+00 2.58E+01 0.00E+00 6.46E+00 -1.36E+01 1.83E+01 -8.69E+00 Fourth-order coefficients -1.02E-01 -1.56E-01 -1.83E-01 6.66E-03 4.42E-02 -1.54E-01 -9.52E-02 Sixth-order coefficient 3.55E-01 6.34E-02 9.82E-02 -5.19E-02 -3.43E-02 9.68E-02 5.85E-02 Eighth-order coefficient -2.34E+00 -4.68E-02 -6.95E-02 6.06E-02 4.84E-02 -4.52E-02 -2.99E-02 Tenth-order coefficient 1.06E+01 6.65E-01 8.62E-02 -5.94E-02 -5.10E-02 1.50E-02 1.16E-02 Twelfth-order coefficient -3.29E+01 -2.89E+00 -1.06E-01 3.91E-02 3.15E-02 -3.36E-03 -3.46E-03 Fourteenth-order coefficient 7.13E+01 6.83E+00 9.01E-02 -1.75E-02 -1.25E-02 5.18E-04 7.79E-04 Sixteenth-order coefficient -1.10E+02 -1.04E+01 -5.08E-02 5.23E-03 3.40E-03 -5.55E-05 -1.31E-04 Eighteenth-order coefficient 1.23E+02 1.09E+01 1.96E-02 -1.01E-03 -6.43E-04 4.12E-06 1.62E-05 Twentieth-order coefficient -9.98E+01 -8.02E+00 -5.25E-03 1.20E-04 8.53E-05 -2.06E-07 -1.45E-06 Twenty-second order coefficient 5.78E+01 4.11E+00 9.86E-04 -7.95E-06 -7.86E-06 6.47E-09 9.29E-08 Twenty-fourth-order coefficient -2.33E+01 -1.45E+00 -1.27E-04 2.25E-07 4.93E-07 -9.76E-11 -4.13E-09 Twenty-sixth order coefficient 6.21E+00 3.31E-01 1.07E-05 0.00E+00 -2.00E-08 -5.30E-13 1.21E-10 Twenty-eighth order coefficient -9.81E-01 -4.46E-02 -5.30E-07 0.00E+00 4.75E-10 4.24E-14 -2.08E-12 Thirty-order coefficient 6.95E-02 2.67E-03 1.17E-08 0.00E+00 -4.98E-12 -4.53E-16 1.60E-14

[0115] Tables 17 to 19 show optical characteristic values ​​and conditional expression values ​​of the imaging lens systems according to the first example to the eighth example.

[0116] [Table 17] Reference First Example Second example Third Example Fourth Example f 5.0500 5.0500 5.0500 5.0500 f1 4.6808 4.6710 4.5943 4.6743 f2 -15.9625 -15.9213 -14.1533 -15.9148 f3 20.9946 21.1899 19.6326 20.9751 f4 -35.9020 -36.8248 -22.1166 -36.4166 f5 -16.0293 -15.4644 -20.8986 -15.6639 f6 3.8366 3.8201 3.7124 3.8283 f7 -3.0850 -3.1046 -2.9881 -3.0987 TTL 5.7994 5.8002 5.7995 5.8002 BFL 1.1094 1.1102 1.0801 1.1102 f number 1.930 1.920 1.930 1.920 IMG HT 5.110 5.110 5.110 5.110 FOV 88.30 88.00 88.30 88.00 Reference Fifth Example Sixth Example Seventh Example Eighth Example f 5.0500 5.0500 5.0500 5.0500 f1 4.6767 4.6786 4.6826 4.6962 f2 -15.9298 -15.9000 -16.1039 -16.3589 f3 20.8362 20.6537 21.1897 21.5507 f4 -35.0255 -34.4205 -35.6186 -36.8446 f5 -15.9665 -16.1057 -15.9424 -15.7446 f6 3.8389 3.8446 3.8625 3.8686 f7 -3.1056 -3.1075 -3.1321 -3.1411 TTL 5.8002 5.8002 5.8003 5.7890 BFL 1.1102 1.1102 1.1103 1.0990 f-number 2.080 1.930 1.930 1.930 IMG HT 5.110 5.110 5.110 5.110 FOV 88.10 88.10 88.10 88.10

[0117] [Table 18] Conditional Expressions First Example Second example Third Example Fourth Example TTL / 2ImgHT 0.5675 0.5675 0.5675 0.5675 f1 / f 0.9269 0.9249 0.9098 0.9256 V1-V2 37.8000 37.8000 36.8000 37.8000 V1-V3 0.3000 0.3000 0.3000 0.3000 V1-V5 32,0000 32,0000 32,0000 32,0000 f2 / f -3.1609 -3.1527 -2.8026 -3.1514 f3 / f 4.1574 4.1960 3.8876 4.1535 f4 / f -7.1093 -7.2920 -4.3795 -7.2112 f5 / f -3.1741 -3.0623 -4.1383 -3.1018 f6 / f 0.7597 0.7564 0.7351 0.7581 f7 / f -0.6109 -0.6148 -0.5917 -0.6136 TTL / f 1.1484 1.1486 1.1484 1.1486 |f1 / f2| 0.2932 0.2934 0.3246 0.2937 f2 / f3 -0.7603 -0.7514 -0.7209 -0.7587 BFL / f 0.2197 0.2198 0.2139 0.2198 D12 / f 0.0118 0.0120 0.0176 0.0120 D12 / D23 0.2538 0.2548 0.3453 0.2541 D23 / D34 0.9401 0.9597 0.8588 0.9471 D56 / D67 0.6363 0.6284 0.6628 0.6338

[0118] [Table 19] Conditional Expression Fifth Example Sixth Example Seventh Example Example 8 TTL / 2ImgHT 0.5675 0.5675 0.5675 0.5664 f1 / f 0.9261 0.9265 0.9273 0.9299 V1-V2 37.9000 37.9000 37.8000 37.9000 V1-V3 32.2000 32.2000 0.3000 32.2000 V1-V5 18.7000 18.7000 32.0000 18.7000 f2 / f -3.1544 -3.1485 -3.1889 -3.2394 f3 / f 4.1260 4.0898 4.1960 4.2675 f4 / f -6.9357 -6.8159 -7.0532 -7.2960 f5 / f -3.1617 -3.1893 -3.1569 -3.1177 f6 / f 0.7602 0.7613 0.7648 0.7661 f7 / f -0.6150 -0.6154 -0.6202 -0.6220 TTL / f 1.1486 1.1486 1.1486 1.1463 |f1 / f2| 0.2936 0.2943 0.2908 0.2871 f2 / f3 -0.7645 -0.7698 -0.7600 -0.7591 BFL / f 0.2198 0.2198 0.2199 0.2176 D12 / f 0.0121 0.0122 0.0118 0.0113 D12 / D23 0.2571 0.2602 0.2477 0.2351 D23 / D34 0.9310 0.9252 0.9432 0.9487 D56 / D67 0.6367 0.6392 0.6368 0.6330

[0119] As described above, according to various embodiments, an imaging lens system that can be mounted in a thin portable electronic device can be provided.

[0120] Although this disclosure includes specific examples, it will be apparent to those skilled in the art 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 illustrative only and not limiting. Descriptions of features or aspects in each example are to be considered applicable to similar features or aspects in other examples. Suitable results may be achieved if the techniques are performed in 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 with other components or their equivalents. Therefore, the scope of the present disclosure is defined not by the detailed description but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as encompassed by this disclosure.

[0121] 100, 200, 300, 400, 500, 600, 700, 800: Imaging lens system 110, 210, 310, 410, 510, 610, 710, 810: first lens 120, 220, 320, 420, 520, 620, 720, 820: Second lens 130, 230, 330, 430, 530, 630, 730, 830: third lens 140, 240, 340, 440, 540, 640, 740, 840: fourth lens 150, 250, 350, 450, 550, 650, 750, 850: Fifth lens 160, 260, 360, 460, 560, 660, 760, 860: Sixth lens 170, 270, 370, 470, 570, 670, 770, 870: Seventh lens IF:Filter IP: Imaging Plane IS: Image sensor

Claims

1. An imaging lens system, comprising: The first lens has a concave image-side surface; The second lens has negative refractive power; The third lens has a convex object-side surface and a convex image-side surface; the fourth lens has refractive power; the fifth lens has refractive power; the sixth lens has refractive power. And a seventh lens having refractive power, wherein the first lens to the seventh lens are arranged sequentially from the object side toward the imaging plane, and wherein -5.0 < f5 / f < -1.0, 0.1 < |f1 / f2| < 0.4, and 0.23 < D12 / D23 < 0.36, where 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, f5 is the focal length of the fifth lens, D12 is the distance from the image-side surface of the first lens to the object-side surface of the second lens, and D23 is the distance from the image-side surface of the second lens to the object-side surface of the third lens.

2. The imaging lens system as claimed in claim 1, wherein the first lens has a convex object-side surface.

3. The imaging lens system as claimed in claim 1, wherein the second lens has a convex object-side surface.

4. The imaging lens system of claim 1, wherein the second lens has a concave image-side surface.

5. The imaging lens system as claimed in claim 1, wherein the fifth lens has a convex object-side surface.

6. The imaging lens system as claimed in claim 1, wherein the sixth lens has a convex object-side surface.

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

8. An imaging lens system, comprising: The first lens has a concave image-side surface; The second lens has refractive power; the third lens has a convex object-side surface and a convex image-side surface. The fourth lens has refractive power; the fifth lens has a convex object-side surface; the sixth lens has refractive power. The system includes a seventh lens with refractive power, wherein the first lens to the seventh lens are arranged sequentially from the object side toward the imaging plane, and wherein -4.0 < f2 / f < -1.0, -5.0 < f5 / f < -1.0, 0.1 < |f1 / f2| < 0.4, and 0.23 < D12 / D23 < 0.36, where 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, f5 is the focal length of the fifth lens, D12 is the distance from the image-side surface of the first lens to the object-side surface of the second lens, and D23 is the distance from the image-side surface of the second lens to the object-side surface of the third lens.

9. The imaging lens system of claim 8, wherein the first lens has a convex object-side surface.

10. The imaging lens system of claim 8, wherein the second lens has a convex object-side surface.

11. The imaging lens system of claim 8, wherein the second lens has a concave image-side surface.

12. The imaging lens system of claim 8, wherein the fifth lens has a concave image-side surface.

13. The imaging lens system of claim 8, wherein the sixth lens has a convex object-side surface.

14. The imaging lens system of claim 8, wherein the seventh lens has a concave image-side surface.

Images