Imaging lens system

Abstract

This invention provides an imaging lens system. 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 to seventh lenses are arranged sequentially from the object side to the imaging side, and the imaging lens system satisfies the following conditions: 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 viewing angle of the imaging lens system.

Description

Technical Field

[0001] Cross-reference to related inventions

[0002] The present invention claims priority from Korean Patent Application No. 10-2022-0038054 filed on March 28, 2022, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference for all purposes.

[0003] The following description relates to an imaging lens system. Prior Art

[0004] The portable electronic device may include a camera module or device for capturing images or videos. In one embodiment, as a non-limiting example, the camera module may be installed in a mobile phone, a notebook computer, a gaming machine, or the like.

[0005] The resolution and resolving power of a camera module, as well as the resolution and resolving power of an imaging lens system, can be proportional to the size of the sensor and the size of the imaging plane. In one example, implementing a high-resolution camera module and imaging lens system may require a relatively large sensor and imaging plane. However, since the size (or length) of the camera module and imaging lens system increases proportionally to the size of the sensor and the imaging plane, it can be difficult to incorporate such a high-resolution camera module and imaging lens system into thin electronic devices such as smartphones. Summary of the Invention

[0006] 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.

[0007] In a general aspect, an 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 to seventh lenses are arranged sequentially from the object side to the imaging side, and wherein the imaging lens system satisfies the following conditional expressions: 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 viewing angle of the imaging lens system.

[0008] The second lens may have a convex object-side surface.

[0009] The third lens may have a convex object-side surface.

[0010] The fourth lens may have a concave object-side surface.

[0011] The fifth lens may have a convex object-side surface.

[0012] The sixth lens may have a convex object-side surface.

[0013] The seventh lens may have a concave object-side surface.

[0014] The imaging lens system may satisfy the following conditional expression: SumD / SumT < 0.9, where SumD is the sum of the air gaps between the first to seventh lenses, and SumT is the sum of the thicknesses of each of the first to seventh lenses.

[0015] The imaging lens system can satisfy the following conditional expression: 0.38 < Yc72 / L72ER, where Yc72 is the shortest distance from the point on the image-side surface of the seventh lens element closest to the imaging plane to the optical axis, and L72ER is the effective radius of the image-side surface of the seventh lens element.

[0016] In a general aspect, an imaging lens system includes: a first lens having negative refractive power; a second lens having positive refractive power; a third lens having a convex object-side surface; 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 to seventh lenses are arranged in sequence from the object side to the image side, and wherein the imaging lens system satisfies the following conditional expressions: 2.8 < (V5 + V7) / V6 < 4.8, and 0.62 < TTL / (ImgHT * 2) < 0.72, wherein 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 plane, and ImgHT is the height of the imaging plane.

[0017] The first lens may have a concave object-side surface.

[0018] The second lens may have a convex object-side surface.

[0019] The fifth lens may have a concave object-side surface.

[0020] The seventh lens may have a convex object-side surface.

[0021] The imaging lens system may satisfy the following conditional expression: -2.0 < f6 / f < 6.0, where f is the focal length of the imaging lens system, and f6 is the focal length of the sixth lens.

[0022] 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.

[0023] Other features and aspects will be apparent from the following detailed description, drawings, and patent scope. Simple diagram description

[0024] FIG. 1 is a configuration diagram showing an example imaging lens system according to a first example. FIG. 2 shows aberration curves of the imaging lens system shown in FIG. 1 . FIG3 is a diagram showing a configuration of an example imaging lens system according to a second example. FIG. 4 shows aberration curves of the imaging lens system shown in FIG. 3 . FIG5 is a diagram showing a configuration of an example imaging lens system according to a third example. FIG. 6 shows aberration curves of the imaging lens system shown in FIG. 5 . FIG7 is a diagram showing the configuration of an example imaging lens system according to a fourth example. FIG8 shows aberration curves of the imaging lens system shown in FIG7. FIG9 is a diagram showing the configuration of an example imaging lens system according to a fifth example. FIG. 10 shows aberration curves of the imaging lens system shown in FIG. 9 . FIG11 is a diagram showing a configuration of an example imaging lens system according to a sixth example. FIG. 12 shows aberration curves of the imaging lens system shown in FIG. 11 . FIG13 is a diagram showing a configuration of an example imaging lens system according to a seventh example. FIG. 14 shows aberration curves of the imaging lens system shown in FIG. 13 . Throughout the drawings and detailed description, the same reference numerals may refer to the same or similar 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 changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will become apparent upon understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those examples set forth herein, but, except for operations that must occur in a certain order, the order of operations may be changed as will become apparent upon understanding the present disclosure. Furthermore, for increased clarity and brevity, descriptions of features that are known upon understanding the present disclosure may be omitted; however, the omission of features and their descriptions is not intended to be an admission of common knowledge.

[0026] The features described herein may be embodied in various forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will become apparent upon understanding the present disclosure.

[0027] 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 to these terms. Rather, these terms are used solely to distinguish one component, element, region, layer, or section from another. Therefore, in the examples described herein, a first component, element, region, layer, or section could also be referred to as a second component, element, region, layer, or section without departing from the teachings of the examples.

[0028] Throughout this 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 interposed. Conversely, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, no other elements may be interposed. Similarly, expressions such as "between" and "immediately between," as well as "adjacent to" and "immediately adjacent to," are to be understood as described above.

[0029] The terminology used herein is for the purpose of describing specific examples only and is not intended to limit the invention. 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 and any combination of any two or more. As used herein, the terms "include," "including," and "having" specify the presence of stated features, values, operations, elements, components, and / or combinations thereof, but do not preclude the presence or addition of one or more additional features, values, operations, elements, components, and / or combinations thereof. As used herein, the 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 this feature, but all examples are not limited thereto.

[0030] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs after understanding the present invention. Terms (such as those defined in commonly used dictionaries) are interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present invention, and are not interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0031] In a non-limiting example, the example imaging lens system may be installed in a portable electronic device.

[0032] In one or more examples, the first lens is the lens closest to the object (or subject), and the seventh lens is the lens closest to the imaging plane (or image sensor). In one or more examples, the units of the lens curvature radius, thickness, TTL (the distance from the object-side surface of the first lens to the imaging plane), ImgHT (the height of the imaging plane), focal length, and effective diameter are indicated in millimeters (mm).

[0033] Lens thickness, inter-lens distance, and TTL refer to the distance between lenses along the optical axis of the imaging lens system. Furthermore, when describing the shape of a lens, a configuration in which one surface is convex indicates that the paraxial region of the surface is convex, and a configuration in which one surface is concave indicates that the paraxial region of the surface is concave. Therefore, even when describing a lens as having one surface as convex, the edge of the lens may also be concave. Similarly, even when describing a lens as having one surface as concave, the edge of the lens may also be convex.

[0034] The imaging lens system described in one or more examples can be configured to be installed on a portable electronic device. In one example, the imaging lens system according to one or more examples can be installed on at least one of the camera modules located on the front or rear of a smartphone, as a non-limiting example. As another non-limiting example, according to one or more examples, the imaging lens system can be installed on a laptop computer, an augmented reality device, a virtual reality device (VR), a portable gaming machine, or the like. The scope and examples of the imaging lens system of the examples are not limited to the above-mentioned electronic devices. In one example, the imaging lens system can provide a relatively narrow installation space but can be applied to electronic devices requiring high-resolution imaging.

[0035] According to a first example, an imaging lens system 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 sequence from the object side to the image side.

[0036] 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 positive refractive power. For example, in the imaging lens system according to the first example, the second lens may have positive refractive power. The imaging lens system according to the first example may include a lens having an Abbe number of a specific 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 table, 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 viewing angle of the imaging lens system.

[0037] 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, arranged in order from the object side to the image side. The imaging lens system according to the second example may include a lens having negative refractive power. For example, in the imaging lens system according to the second example, the first lens may have negative refractive power. The imaging lens system according to the second example may include a lens having positive refractive power. For example, in the imaging lens system according to the second example, the second lens and the fifth lens may each have positive refractive power. The imaging lens system according to the second example may include a lens having a convex object-side surface. 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 can satisfy the following conditions: 2.8 < (V5 + V7) / V6 < 4.8 and 0.62 < TTL / (ImgHT*2) < 0.72. For reference, in the above conditional table, V5 is the Abbe number of the fifth lens element, V6 is the Abbe number of the sixth lens element, V7 is the Abbe number of the seventh lens element, TTL is the distance from the object-side surface of the first lens element to the imaging plane, and ImgHT is the height of the imaging plane.

[0038] 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 the third example alone does not satisfy the following conditional expressions. 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

[0039] In the above conditional table, 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 plane 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 plane.

[0040] 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 the fourth example alone does not satisfy the following conditional expressions. 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

[0041] In the above conditional table, 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, f7 is the focal length of the seventh lens, and BFL is the distance from the image-side surface of the seventh lens to the imaging plane.

[0042] The example imaging lens system may optionally include one or more lenses having the following characteristics. For example, the imaging lens system 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 example imaging lens system according to the above examples may not necessarily include lenses having the following characteristics. The characteristics of the first to seventh lenses will be described below.

[0043] In an example, the first lens may have refractive power. The first lens may have a shape with one surface being 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 from a material having high light transmittance and excellent workability. For example, the first lens may be formed from 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 greater. As a specific example, the Abbe number of the first lens may be greater than 53 and less than 58.

[0044] In an example, the second lens may have refractive power. The second lens may have a shape with one surface being convex. For example, the second lens may have a convex object-side surface. 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 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 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 greater. As a specific example, the Abbe number of the second lens may be greater than 20 and less than 60.

[0045] In an example, the third lens may have refractive power. The third lens may have a shape with one surface being convex. For example, the third lens may have a convex object-side surface. 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 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 Abbe number of the third lens may be 50 or greater. As a specific example, the Abbe number of the third lens may be greater than 53 and less than 58.

[0046] In an example, the fourth lens may have refractive power. The fourth lens may have a shape with one surface being 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 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 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.

[0047] In an example, the fifth lens may have refractive power. The fifth lens may have a shape with one surface being convex. For example, the fifth lens may have a convex object-side surface. 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 from a material having high light transmittance and excellent workability. For example, the fifth lens may be formed from 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.

[0048] In an example, the sixth lens may have refractive power. The sixth lens may have a convex surface. For example, the sixth lens may have a convex object-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 processability. 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 1.65. 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.

[0049] In an example, the seventh lens may have refractive power. The seventh lens may have a shape with one surface being 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 processability. 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.

[0050] The first through seventh lenses may include spherical or aspherical surfaces, as described above. When the first through seventh lenses include aspherical surfaces, the aspherical surfaces of the corresponding lenses may be expressed by the following equation 1:

[0051] In Equation 1, c is the inverse of the radius of curvature of the corresponding lens, k is the conic constant, r is the distance from any point on the aspheric surface to the optical axis, A through J are aspheric surface constants, and Z (or SAG) is the height from a point on the aspheric surface to the vertex of the corresponding aspheric surface in the direction of the optical axis.

[0052] The imaging lens system according to the above embodiments or the above embodiments may further include an aperture and a filter. In one example, the imaging lens system may further include an aperture disposed between the second lens and the third lens. In 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 be configured to block light of a specific wavelength. For reference, the filter described in one or more examples may be configured to block infrared light, but the wavelengths of light blocked by the filter are not limited to infrared light.

[0053] Hereinafter, one or more examples of imaging lens systems will be described with reference to the drawings.

[0054] An example imaging lens system according to the first example will be described with reference to FIG. 1 .

[0055] 1 , an 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 .

[0056] In an example, the first lens 110 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 120 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 130 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 140 may have 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 positive refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, 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 negative refractive power and may have a concave object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 170.

[0057] The imaging lens system 100 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between the seventh lens 170 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 110 onto the seventh lens 170 is focused. 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.

[0058] The imaging lens system 100 configured as described above can exhibit the aberration characteristics shown in Fig. 2. Tables 1 and 2 show the lens characteristics and aspheric surface values ​​of the imaging lens system according to this example.

[0059] Table 1: Surface number Components 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 aperture infinity 0.1000 0.8000 S6 The third lens 7.8935 0.7994 1.5441 56.1 0.9995 S7 -2.6026 0.6023 1.1897 S8 The fourth lens -3.7595 0.2800 1.6707 19.2 1.3630 S9 -16.3450 0.1213 1.8300 S10 5th lens 1000.00 0.9027 1.5441 56.1 1.8424 S11 -2.4288 0.5205 2.0300 S12 6th lens 1.3088 0.3105 1.6349 23.9 2.5836 S13 1.3823 0.5630 3.1117 S14 7th lens -3.5090 0.2000 1.5350 55.7 3.6445 S15 6.0000 0.3500 3.8282 S16 filter infinity 0.2100 1.5168 64.2 4.5473 S17 infinity 0.8185 4.6351 S18 Imaging plane infinity 0.0300 5.2579

[0060] Table 2: Surface number S1 S2 S3 S4 S6 S7 S8 K -69.2946 0.9351 -1.4589 8.2995 -17.3133 3.1905 4.0155 A 0.0982 0.0790 -0.0175 0.0958 0.0261 0.0031 0.0403 B -0.0901 -0.0787 -0.2707 -1.6300 -0.3771 -0.3074 -0.3712 C 0.1362 0.1278 1.5136 17.3348 3.8941 2.3312 -0.6450 D -0.1860 -0.1191 -4.9472 -119.8855 -25.9906 -11.1228 9.0898 E 0.1939 -0.0171 11.1608 569.6616 117.8256 35.8394 -35.5112 F -0.1488 0.1870 -18.1488 -1913.3056 -377.4550 -80.8013 82.5122 G 0.0837 -0.2493 21.6131 4623.6899 872.5646 130.0046 -129.3763 H -0.0345 0.1866 -18.9556 -8111.0296 -1467.7181 -150.5404 142.9319 J 0.0104 -0.0908 12.2036 10325.2523 1791.4908 125.2756 -112.7924 I -0.0022 0.0298 -5.6866 -9430.8638 -1564.3247 -73.9880 63.2819 M 0.0003 -0.0066 1.8629 6017.8287 948.8225 30.1662 -24.6624 N 0.0000 0.0009 -0.4063 -2545.2239 -378.4344 -8.0512 6.3465 O 0.0000 -0.0001 0.0529 640.7329 88.9982 1.2630 -0.9695 P 0.0000 0.0000 -0.0031 -72.6356 -9.3306 -0.0881 0.0666 Surface number S9 S10 S11 S12 S13 S14 S15 K 38.5924 99.0000 -1.1340 -7.7273 -6.1489 -15.9231 -99.0000 A 0.2803 0.2621 -0.1299 -0.0305 -0.1621 -0.1333 -0.0081 B -1.4046 -0.9638 0.2478 -0.2097 0.0513 0.0988 0.0001 C 3.2365 1.9426 -0.4315 0.3469 0.0302 -0.0412 0.0000 D -4.6828 -2.7736 0.5595 -0.3330 -0.0528 0.0113 0.0000 E 3.8766 2.8514 -0.5246 0.2112 0.0328 -0.0020 0.0000 F -0.5412 -2.1143 0.3522 -0.0966 -0.0118 0.0002 0.0000 G -2.9245 1.1350 -0.1694 0.0340 0.0028 0.0000 0.0000 H 4.0735 -0.4401 0.0590 -0.0094 -0.0004 0.0000 0.0000 J -3.0052 0.1214 -0.0149 0.0020 0.0001 0.0000 0.0000 I 1.4271 -0.0229 0.0027 -0.0003 0.0000 0.0000 0.0000 M -0.4500 0.0027 -0.0004 0.0000 0.0000 0.0000 0.0000 N 0.0915 -0.0002 0.0000 0.0000 0.0000 0.0000 0.0000 O -0.0109 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 P 0.0006 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000

[0061] An example imaging lens system according to the second example will be described with reference to FIG. 3 .

[0062] The example 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 .

[0063] In an example, the first lens 210 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 220 may have 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 negative refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 250 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The sixth lens 260 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, 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 negative refractive power and may have a concave object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 270.

[0064] The imaging lens system 200 may further include an optical filter IF and an imaging plane IP. In one embodiment, the optical filter IF may be disposed between the seventh lens 270 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 210 onto the seventh lens 270 is focused. 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.

[0065] The imaging lens system 200 configured as described above can exhibit the aberration characteristics shown in Fig. 4. Tables 3 and 4 below show the lens characteristics and aspheric surface values ​​of the imaging lens system according to the present example.

[0066] Table 3: Surface number Components 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 aperture infinity 0.1000 0.8000 S6 The third lens 10.1354 0.7501 1.5441 56.1 0.9896 S7 -2.5867 0.6768 1.1771 S8 The fourth lens -3.4908 0.2775 1.6707 19.2 1.3831 S9 -12.9494 0.0585 1.8300 S10 5th lens -14.9636 0.8839 1.5441 56.1 1.8683 S11 -2.1614 0.4452 2.0000 S12 6th lens 1.4245 0.4517 1.6349 23.9 2.4353 S13 1.4481 0.4899 3.1296 S14 7th lens -6.3803 0.3600 1.5350 55.7 4.1678 S15 4.6486 0.3500 4.3993 S16 filter infinity 0.2100 1.5168 64.2 4.6595 S17 infinity 0.8442 4.7353 S18 Imaging plane infinity 0.0300 5.2614

[0067] Table 4: Surface number 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 I 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 Surface number 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 I 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

[0068] An example imaging lens system according to the third example will be described with reference to FIG. 5 .

[0069] The example 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 .

[0070] In an example, the first lens 310 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 320 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 330 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 340 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 350 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The sixth lens 360 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on both the object-side surface and the image-side surface of the sixth lens 360. The seventh lens 370 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on both the object-side surface and the image-side surface of the seventh lens 370.

[0071] 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 element 370 and imaging plane IP. Imaging plane IP may be formed at a location where light incident from first lens element 310 onto seventh lens element 370 is focused. For example, imaging plane IP may be formed on a surface of image sensor IS of the camera module or within image sensor IS.

[0072] The imaging lens system 300 configured as above can exhibit the aberration characteristics shown in Fig. 6. Tables 5 and 6 show the lens characteristics and aspheric surface values ​​of the imaging lens system according to this example.

[0073] Table 5 Surface number Components Radius of curvature Thickness / distance Refractive index Abbe number Effective radius S1 First lens -4.8337 0.4554 1.5458 56.0 2.4000 S2 30.6701 0.0449 2.1088 S3 Second lens 1.4003 0.3540 1.5458 56.0 1.2812 S4 1.9027 0.4947 1.0086 S5 aperture infinity 0.0279 0.8000 S6 The third lens 10.7884 1.1581 1.5458 56.0 0.9061 S7 -3.2107 0.3693 1.2907 S8 The fourth lens -6.8343 0.3000 1.6769 19.2 1.4244 S9 17.7745 0.0830 1.6925 S10 5th lens 114.584 1.1243 1.5458 56.0 2.0009 S11 -1.3546 0.0300 2.1367 S12 6th lens 1.9509 0.3000 1.5699 37.4 2.4817 S13 1.1684 0.8808 3.4694 S14 7th lens 3.4150 0.4000 1.5458 56.0 3.8074 S15 1.4868 0.4066 4.0650 S16 filter infinity 0.2100 1.5168 64.2 4.7802 S17 infinity 0.4786 4.8664 S18 Imaging plane infinity 0.0114 5.2272

[0074] Table 6: Surface number 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 I 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 Surface number 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 I 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

[0075] An example imaging lens system according to a fourth example will be described with reference to FIG. 7 .

[0076] Example 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 .

[0077] In an example, the first lens 410 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 420 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 430 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 440 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 450 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The sixth lens 460 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, 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 negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 470.

[0078] Imaging lens system 400 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between the seventh lens 470 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 410 onto the seventh lens 470 is focused. 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.

[0079] The imaging lens system 400 configured as described above can exhibit aberration characteristics shown in Fig. 8. Tables 7 and 8 below show lens characteristics and aspheric surface values ​​of the imaging lens system according to the present example.

[0080] Table 7: Surface number Components Radius of curvature Thickness / distance Refractive index Abbe number Effective radius S1 First lens -4.9318 0.5097 1.5458 56.0 2.5500 S2 21.4530 0.0945 2.1730 S3 Second lens 1.4788 0.3915 1.5458 56.0 1.3343 S4 2.2263 0.4156 1.0267 S5 aperture infinity 0.0279 0.8150 S6 The third lens 8.8944 1.1131 1.5458 56.0 0.9735 S7 -2.9169 0.4200 1.3025 S8 The fourth lens -4.0175 0.2817 1.6769 19.2 1.4363 S9 47.5355 0.0937 1.7311 S10 5th lens -17.2760 0.9636 1.5458 56.0 1.7956 S11 -1.2934 0.0300 2.0775 S12 6th lens 3.1154 0.3900 1.5699 37.4 2.7811 S13 1.5843 0.6732 3.6125 S14 7th lens 3.0857 0.4600 1.5458 56.0 4.0155 S15 1.4181 0.3642 4.2400 S16 filter infinity 0.2100 1.5168 64.2 4.8172 S17 infinity 0.6761 4.8851 S18 Imaging plane infinity 0.0139 5.2569

[0081] Table 8: Surface number 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 I 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 Surface number 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 I 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

[0082] An example imaging lens system according to a fifth example will be described with reference to FIG. 9 .

[0083] Example 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 .

[0084] The first lens 510 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 520 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 530 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 540 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 550 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The sixth lens 560 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. In addition, 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 negative refractive power and may have a convex object-side surface and a concave image-side surface. In addition, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 570.

[0085] The imaging lens system 500 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between the seventh lens 570 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 510 onto the seventh lens 570 is focused. 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.

[0086] The imaging lens system 500 configured as described above can exhibit the aberration characteristics shown in Fig. 10. Tables 9 and 10 show the lens characteristics and aspheric surface values ​​of the imaging lens system according to this example.

[0087] Table 9: Surface number Components Radius of curvature Thickness / distance Refractive index Abbe number Effective radius S1 First lens -4.4459 0.6723 1.5458 56.0 2.5000 S2 18.0047 0.0900 1.7931 S3 Second lens 1.6717 0.4210 1.5458 56.0 1.3205 S4 2.2608 0.4030 0.9493 S5 aperture infinity 0.0279 0.7300 S6 The third lens 6.8028 0.9638 1.5458 56.0 0.9362 S7 -2.2337 0.3480 1.1953 S8 The fourth lens -6.8781 0.3300 1.6769 19.2 1.3601 S9 28.3570 0.2078 1.7400 S10 5th lens -2.8371 1.0667 1.5458 56.0 1.8586 S11 -1.0509 0.0300 2.1085 S12 6th lens 1.3886 0.4000 1.5699 37.4 3.4000 S13 0.8041 0.6163 3.7643 S14 7th lens 11.7908 0.4800 1.5458 56.0 4.1395 S15 4.3228 0.2723 4.2920 S16 filter infinity 0.2100 1.5168 64.2 4.7443 S17 infinity 0.5650 4.8274 S18 Imaging plane infinity 0.0250 5.2245

[0088] Table 10: Surface number S1 S2 S3 S4 S6 S7 S8 K -32.2710 95.9661 -3.9537 3.8804 -32.3967 1.3824 17.9694 A 0.0981 0.3594 0.2888 0.0027 0.0117 -0.0229 -0.1761 B -0.0739 -0.8875 -0.7817 -0.1281 -0.0327 -0.7004 0.0257 C 0.0475 1.8045 1.3801 0.1699 0.0639 6.3405 -0.6269 D -0.0210 -3.0242 -1.8439 0.1346 -0.1108 -36.4497 4.3662 E 0.0049 4.0221 1.7379 -1.3565 0.0921 141.5207 -16.1414 F 0.0006 -4.1454 -1.1275 3.1484 -0.0442 -385.5317 38.3417 G -0.0010 3.2604 0.5088 -4.0468 0.0136 754.8784 -62.0017 H 0.0004 -1.9346 -0.1618 3.4001 -0.0029 -1074.8365 70.4037 J -0.0001 0.8552 0.0365 -1.9876 0.0004 1113.2604 -56.8856 I 0.0000 -0.2764 -0.0058 0.8198 0.0000 -829.0559 32.5822 M 0.0000 0.0633 0.0006 -0.2340 0.0000 431.9334 -12.9271 N 0.0000 -0.0097 0.0000 0.0439 0.0000 -149.2555 3.3755 O 0.0000 0.0009 0.0000 -0.0048 0.0000 30.6956 -0.5211 P 0.0000 0.0000 0.0000 0.0002 0.0000 -2.8405 0.0360 Surface number S9 S10 S11 S12 S13 S14 S15 K -81.4061 -20.5997 -1.0381 -2.0008 -3.2251 -46.8038 -1.7401 A -0.0475 0.0260 0.1334 -0.1933 -0.0917 -0.0167 -0.0511 B -0.1737 -0.2001 -0.1308 0.1142 0.0577 0.0051 0.0294 C 0.5662 0.5705 0.0009 -0.0483 -0.0278 -0.0008 -0.0162 D -1.0432 -0.9373 0.2488 0.0136 0.0097 0.0001 0.0066 E 1.2874 1.0131 -0.4319 -0.0026 -0.0025 0.0000 -0.0019 F -1.0922 -0.7714 0.4175 0.0003 0.0005 0.0000 0.0004 G 0.6522 0.4302 -0.2660 0.0000 -0.0001 0.0000 -0.0001 H -0.2785 -0.1788 0.1172 0.0000 0.0000 0.0000 0.0000 J 0.0854 0.0554 -0.0362 0.0000 0.0000 0.0000 0.0000 I -0.0187 -0.0126 0.0078 0.0000 0.0000 0.0000 0.0000 M 0.0028 0.0020 -0.0011 0.0000 0.0000 0.0000 0.0000 N -0.0003 -0.0002 0.0001 0.0000 0.0000 0.0000 0.0000 O 0.0000 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

[0089] An example imaging lens system according to the sixth example will be described with reference to FIG. 11 .

[0090] The example 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 .

[0091] The first lens 610 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 620 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 630 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 640 may have negative refractive power and may have a concave object-side surface and a convex image-side surface. The 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 negative refractive power and may have a convex object-side surface and a concave image-side surface. In addition, 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 negative refractive power and may have a convex object-side surface and a concave image-side surface. In addition, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 670.

[0092] The imaging lens system 600 may further include an optical filter IF and an imaging plane IP. The optical filter IF may be disposed between the seventh lens 670 and the imaging plane IP. The imaging plane IP may be formed at a location where light incident from the first lens 610 onto the seventh lens 670 is focused. 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.

[0093] The imaging lens system 600 configured as described above can exhibit the aberration characteristics shown in Fig. 12. Tables 11 and 12 below show the lens characteristics and aspheric surface values ​​of the imaging lens system according to the present example.

[0094] Table 11: Surface number Components Radius of curvature Thickness / distance Refractive index Abbe number Effective radius S1 First lens -4.5000 0.4035 1.5458 56.0 2.1500 S2 18.2164 0.0995 1.8573 S3 Second lens 1.4470 0.4181 1.5458 56.0 1.2843 S4 2.1002 0.4264 0.9532 S5 aperture infinity 0.0279 0.7720 S6 The third lens 10.0069 0.9785 1.5458 56.0 0.9183 S7 -2.4305 0.3657 1.2021 S8 The fourth lens -4.6126 0.3300 1.6769 19.2 1.3650 S9 -890.70 0.1450 1.6624 S10 5th lens -3.3577 1.1190 1.5458 56.0 1.7658 S11 -1.0934 0.0300 2.0994 S12 6th lens 1.6129 0.4600 1.5699 37.4 2.9817 S13 0.8753 0.6367 3.6049 S14 7th lens 8.1504 0.5000 1.5458 56.0 3.8137 S15 3.7755 0.2888 4.2500 S16 filter infinity 0.2100 1.5168 64.2 4.7246 S17 infinity 0.6773 4.8048 S18 Imaging plane infinity 0.0127 5.2499

[0095] Table 12: Surface number S1 S2 S3 S4 S6 S7 S8 K -75.8597 75.4758 -3.7953 3.2739 85.6148 1.4355 6.2660 A 0.1285 0.3226 0.2451 0.0056 -0.0125 -0.0706 -0.2647 B -0.1184 -0.7427 -0.6249 -0.0088 -0.0156 -0.1193 0.5427 C 0.0988 1.3230 1.2809 -0.1077 0.0320 1.2783 -3.5107 D -0.0669 -1.9503 -2.2569 -0.0307 -0.1201 -7.0302 16.3515 E 0.0357 2.2753 2.8681 0.4758 0.1559 24.2571 -49.3148 F -0.0148 -2.0444 -2.5236 -0.7500 -0.1070 -55.1680 101.6907 G 0.0048 1.3995 1.5574 0.4638 0.0457 82.8134 -148.2555 H -0.0012 -0.7248 -0.6818 0.0543 -0.0131 -77.9338 155.3042 J 0.0002 0.2810 0.2120 -0.2781 0.0026 36.1013 -117.2393 I 0.0000 -0.0801 -0.0463 0.1977 -0.0003 8.2401 63.1365 M 0.0000 0.0163 0.0069 -0.0729 0.0000 -23.4488 -23.6183 N 0.0000 -0.0022 -0.0007 0.0154 0.0000 15.0081 5.8208 O 0.0000 0.0002 0.0000 -0.0018 0.0000 -4.5698 -0.8484 P 0.0000 0.0000 0.0000 0.0001 0.0000 0.5670 0.0553 Surface number S9 S10 S11 S12 S13 S14 S15 K 99.0000 -33.7649 -1.0960 -2.2665 -4.3538 -7.0057 -19.6569 A -0.1059 0.0771 0.1908 -0.2121 -0.1194 -0.0782 -0.0092 B -0.0177 -0.3004 -0.3521 0.1663 0.1143 0.0464 0.0009 C -0.3680 0.2001 0.5635 -0.0890 -0.0652 -0.0137 0.0000 D 1.9250 0.5297 -0.7040 0.0306 0.0240 0.0023 0.0000 E -4.0832 -1.3215 0.6525 -0.0070 -0.0061 -0.0002 0.0000 F 5.2128 1.4408 -0.4349 0.0011 0.0011 0.0000 0.0000 G -4.4839 -0.9520 0.2067 -0.0001 -0.0001 0.0000 0.0000 H 2.7138 0.4091 -0.0700 0.0000 0.0000 0.0000 0.0000 J -1.1714 -0.1139 0.0169 0.0000 0.0000 0.0000 0.0000 I 0.3585 0.0189 -0.0029 0.0000 0.0000 0.0000 M -0.0759 -0.0013 0.0003 0.0000 0.0000 0.0000 N 0.0106 -0.0001 0.0000 0.0000 0.0000 0.0000 O -0.0009 0.0000 0.0000 0.0000 0.0000 0.0000 P 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000

[0096] An example imaging lens system according to a seventh example will be described with reference to FIG. 13 .

[0097] Example 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 .

[0098] In an example, the first lens 710 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The second lens 720 may have positive refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 730 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 740 may have negative refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 750 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The sixth lens 760 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, 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 negative refractive power and may have a convex object-side surface and a concave image-side surface. Furthermore, an inflection point may be formed on the object-side surface and the image-side surface of the seventh lens 770.

[0099] 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 onto the seventh lens 770 is focused. 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.

[0100] The imaging lens system 700 configured as described above can exhibit the aberration characteristics shown in Fig. 14. Tables 13 and 14 below show the lens characteristics and aspheric surface values ​​of the imaging lens system according to the present example.

[0101] Table 13: Surface number Components 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 aperture infinity 0.1100 0.7200 S6 The third lens 6.4444 0.9111 1.5458 56.0 1.0542 S7 -2.2855 0.3600 1.2181 S8 The fourth lens -7.6898 0.3300 1.6769 19.2 1.3609 S9 -312.52 0.1299 1.7300 S10 5th lens -2.7448 1.1499 1.5458 56.0 1.8009 S11 -1.1057 0.0300 2.0823 S12 6th lens 1.4011 0.4500 1.5699 37.4 2.9046 S13 0.7860 0.3606 3.6035 S14 7th lens 6.0000 0.4700 1.5458 56.0 3.8600 S15 4.5741 0.4281 4.1473 S16 filter infinity 0.2100 1.5168 64.2 4.6450 S17 infinity 0.6450 4.7331 S18 Imaging plane infinity 0.0250 5.2232

[0102] Table 14: Surface number S1 S2 S3 S4 S6 S7 S8 K -45.8846 49.4317 -4.5402 4.3754 -34.8124 1.6273 23.8943 A 0.1167 0.2374 0.1363 0.0157 0.0125 -0.0298 -0.1063 B -0.0962 -0.2824 -0.2671 -0.1120 0.0015 -0.4729 -0.0560 C 0.0735 0.2741 0.4935 0.5382 -0.0546 3.3793 -2.9374 D -0.0468 -0.2075 -0.9765 -3.1649 0.0625 -16.1601 20.4711 E 0.0237 0.0726 1.2854 11.7761 -0.0376 53.9443 -72.7735 F -0.0093 0.0507 -1.0616 -28.0581 0.0142 -128.6900 167.1940 G 0.0028 -0.0940 0.5750 44.8537 -0.0036 222.3306 -266.6910 H -0.0006 0.0713 -0.2117 -49.0043 0.0006 -279.6891 303.7493 J 0.0001 -0.0340 0.0539 36.8961 -0.0001 255.4585 -248.7923 I 0.0000 0.0110 -0.0095 -19.1090 0.0000 -167.2282 145.2934 M 0.0000 -0.0024 0.0011 6.6869 0.0000 76.3249 -58.9500 N 0.0000 0.0003 -0.0001 -1.5110 0.0000 -23.0330 15.7667 O 0.0000 0.0000 0.0000 0.1992 0.0000 4.1257 -2.4962 P 0.0000 0.0000 0.0000 -0.0116 0.0000 -0.3318 0.1770 Surface number S9 S10 S11 S12 S13 S14 S15 K 99.0000 -34.5084 -1.0126 -2.0109 -4.2133 -0.6795 -0.6977 A 0.3510 0.4251 0.2982 -0.1803 -0.0541 -0.0086 0.0545 B -1.5534 -1.2442 -0.6476 0.0608 0.0173 -0.0008 -0.0842 C 3.3985 2.1762 1.1384 -0.0123 -0.0077 0.0001 0.0555 D -5.0926 -2.7565 -1.6200 0.0014 0.0033 0.0000 -0.0227 E 5.6073 2.7171 1.8104 0.0000 -0.0010 0.0000 0.0063 F -4.6202 -2.1169 -1.5320 0.0000 0.0002 0.0000 -0.0012 G 2.8544 1.2865 0.9642 0.0000 0.0000 0.0000 0.0002 H -1.3145 -0.5971 -0.4466 0.0000 0.0000 0.0000 0.0000 J 0.4459 0.2070 0.1505 0.0000 0.0000 0.0000 0.0000 I -0.1092 -0.0523 -0.0363 0.0000 0.0000 0.0000 0.0000 M 0.0187 0.0093 0.0061 0.0000 0.0000 0.0000 0.0000 N -0.0021 -0.0011 -0.0007 0.0000 0.0000 0.0000 0.0000 O 0.0001 0.0001 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

[0103] Tables 15 and 16 show the optical characteristic values ​​and conditional expression values ​​of the imaging lens systems according to the first to seventh examples, where Yc62 is the shortest distance from the point on the image-side surface of the sixth lens closest to the imaging plane to the optical axis.

[0104] Table 15: Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 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

[0105] Table 16: Conditional expression Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 TTL / (ImgHT*2) 0.7101 0.7021 0.6962 0.6962 0.6962 0.6962 0.7002 SumD / SumT 0.8591 0.7536 0.4718 0.4270 0.3976 0.4113 0.4064 TTL / f 1.9846 2.0037 1.9237 1.8457 2.2674 2.0119 2.4728 f3 / f 1.0088 1.0779 1.2602 1.0778 1.0183 1.0401 1.1069 f4 / f -2.0045 -2.0093 -1.9581 -1.4136 -2.5910 -1.9333 -4.0183 f5 / f 1.2157 1.2632 0.6642 0.6494 0.8033 0.7138 0.9377 f6 / f 4.0066 4.5488 -1.6024 -1.6137 -1.4184 -1.2252 -1.4755 f7 / f -1.1212 -1.3850 -1.4048 -1.3790 -4.0697 -3.7898 -13.7640 |f1 / f2| 0.5831 0.5622 0.9787 1.0715 0.6887 0.9450 0.5682 BFL / f 0.3844 0.3997 0.2986 0.3273 0.3410 0.3355 0.4512 D12 / f 0.0576 0.0493 0.0121 0.0245 0.0286 0.0281 0.1252 Yc62 / Yc72 0.6964 0.4822 1.1484 1.1631 0.8215 0.9134 0.8589 (V5+V7) / V6 4.6793 4.6793 2.9939 2.9939 2.9939 2.9939 2.9939 Yc72 / L72ED 0.3826 0.5819 0.4560 0.4215 0.6219 0.5424 0.5908

[0106] An imaging lens system according to one or more embodiments can be installed in a thin portable electronic device while achieving high resolution and high definition.

[0107] Although this disclosure includes specific examples, it will be apparent to those skilled in the art, upon understanding the disclosure, that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Appropriate results may be achieved if the described 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.

[0108] Therefore, the scope of the present invention is defined not by the embodiments but by the scope of the claims and their equivalents, and all changes within the scope of the claims and their equivalents should be construed as being included in the present invention.

[0109] 100, 200, 300, 400, 500, 600, 700: Optical imaging system 110, 210, 310, 410, 510, 610, 710: first lens 120, 220, 320, 420, 520, 620, 720: Second lens 130, 230, 330, 430, 530, 630, 730: third lens 140, 240, 340, 440, 540, 640, 740: fourth lens 150, 250, 350, 450, 550, 650, 750: Fifth lens 160, 260, 360, 460, 560, 660, 760: Sixth lens 170, 270, 370, 470, 570, 670, 770: Seventh lens IF:Filter IP: Imaging Plane IS: Image sensor L72ER: Effective radius Yc62, Yc72: distance

Claims

1. An imaging lens system, comprising: The first lens has negative refractive power and a concave object-side surface; The second lens has refractive power; The third lens has positive refractive power; The fourth lens has refractive power and a concave object-side surface; The fifth lens has refractive power; the sixth lens has positive refractive power, with a convex object-side surface and a concave image-side surface. The system includes a seventh lens with negative refractive power, wherein the first lens to the seventh lens are arranged sequentially from the object side to the imaging plane, and wherein the imaging lens system satisfies the following condition: 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.

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

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

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

5. The imaging lens system as claimed in claim 1, wherein the second lens has positive refractive power.

6. The imaging lens system of claim 1, wherein the second lens has a protruding side surface.

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

8. The imaging lens system as claimed in claim 1, wherein the fifth lens has positive refractive power.

9. The imaging lens system of claim 1, wherein the imaging lens system satisfies the following condition: 0.62 < TTL / (ImgHT*2) < 0.72, where TTL is the distance from the object-side surface of the first lens to the imaging plane, and ImgHT is the height of the imaging plane.

10. The imaging lens system of claim 1, wherein the imaging lens system satisfies the following condition: SumD / SumT < 0.9, where SumD is the sum of the air gaps between the first lens and the seventh lens, and SumT is the sum of the thicknesses of each of the first lens and the seventh lens.

11. The imaging lens system of claim 1, wherein the imaging lens system satisfies the following condition: -2.0 < f6 / f < 6.0, where f is the focal length of the imaging lens system and f6 is the focal length of the sixth lens.

12. The imaging lens system as claimed in claim 1, wherein the imaging lens system satisfies the following condition: 0.4 < f5 / f < 1.4, where f is the focal length of the imaging lens system and f5 is the focal length of the fifth lens.

Images