Imaging lens system, camera module, and portable terminal

Abstract

The present disclosure relates to an imaging lens system, a camera module, and a portable terminal. The imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens sequentially arranged from the object side, satisfying 0.15 < BFL / TTL and 1.9 mm < BFL < 2.8 mm, where BFL is the distance from the image side surface of the eighth lens to the imaging surface, and TTL is the distance from the object side surface of the first lens to the imaging surface.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority of Korean Patent Application No. 10 - 2021 - 0129628, filed on September 30, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

[0003] The present disclosure relates to an imaging lens system, and more particularly, to an imaging lens system that can be mounted in a portable electronic device. Background art

[0004] Portable electronic devices include a camera module for taking images or videos. For example, the camera module can be mounted in a mobile phone, a laptop computer, a game console, etc.

[0005] The resolution of the camera module and the imaging lens system can be proportional to the size of the sensor and the imaging surface. For example, in order to implement a high - resolution camera module and imaging lens system, a sensor and an imaging surface of a relatively large size are required. However, since the size (or length) of the camera module and the imaging lens system increases proportionally to the size of the sensor and the imaging surface, it may be difficult to mount a high - resolution camera module and imaging lens system in a thin electronic device such as a smart phone.

[0006] The above information is presented only as background information to help understand the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above constitutes prior art with respect to the present disclosure. Summary of the invention

[0007] The present invention content is provided to introduce a selection of concepts that are further described below in the detailed description in a simplified form. The present invention content is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0008] 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, a seventh lens, and an eighth lens sequentially arranged from the object side, where 0.15 < BFL / TTL and 1.9 mm < BFL < 2.8, where BFL is the distance from the image side surface of the eighth lens to the imaging surface, and TTL is the distance from the object side surface of the first lens to the imaging surface.

[0009] ImgHT can be greater than or equal to 5.0 mm and less than or equal to 9.0 mm, where ImgHT is the height of the imaging surface.

[0010] T1 / ImgHT can be greater than 0.1 and less than 0.2, where T1 is the thickness of the first lens at the center of the optical axis.

[0011] f1 / f can be greater than 0 and less than 2.0, where f1 is the focal length of the first lens and f is the focal length of the imaging lens system.

[0012] f2 / f can be greater than -3.5 and less than 0, where f2 is the focal length of the second lens.

[0013] TTL / f can be greater than 0.8 and less than 1.2.

[0014] (TTL - BFL) / 2ImgHT can be less than 0.65, where 2ImgHT is the diagonal length of the imaging surface.

[0015] f7 / f can be greater than 0 and less than 0.8, where f7 is the focal length of the seventh lens.

[0016] SUMT / BFL can be greater than 1.3 and less than 2.8, where SUMT is the sum of the thicknesses of the first lens to the eighth lens at the center of the optical axis.

[0017] The camera module may include an imaging lens system and an image sensor, the image sensor including an imaging surface disposed at the imaging surface of the imaging lens system, wherein the image sensor may convert an image of an object formed by the lens of the imaging lens system on the effective imaging area of the imaging surface into an electrical signal.

[0018] The portable terminal may include a housing, and the camera module may be disposed in the housing.

[0019] In another general aspect, the imaging lens system includes a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a negative refractive power, wherein 2.0 < DL1LP / BFL < 5.4 is satisfied, where DL1LP is the distance from the object side surface of the first lens to the image side surface of the last lens, the last lens being the lens closest to the imaging surface, and BFL is the distance from the image side surface of the last lens to the imaging surface.

[0020] The fourth lens may have a negative refractive power.

[0021] The fifth lens may have a positive refractive power.

[0022] The fourth lens may have a concave image side surface.

[0023] BFL / TTL can be greater than 0.15 and less than 0.40.

[0024] The TTL / f can be greater than 1.0 and less than 1.3.

[0025] The camera module may include an imaging lens system and an image sensor having an imaging surface disposed at an imaging plane of the imaging lens system, wherein the image sensor can convert an image of an object formed by a lens of the imaging lens system on an effective imaging region of the imaging surface into an electrical signal, and wherein the imaging lens system can move toward the image sensor, and (BFLx - BFLm) / BFLx can be greater than 0.6 and less than 0.8, where BFLx is the distance from the image side of the last lens closest to the image sensor to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is the distance from the image side of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.

[0026] In another general aspect, the camera module includes an imaging lens system and an image sensor, the imaging lens system including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side, wherein the imaging lens system can move toward the image sensor and satisfies 0.6 < (BFLx - BFLm) / BFLx < 0.8, where BFLx is the distance from the image side of the last lens closest to the image sensor to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is the distance from the image side of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.

[0027] The imaging lens system may further include one or more additional lenses disposed on the image side of the sixth lens facing the image sensor, and wherein BFL / TTL can be greater than 0.15 and BFL can be greater than 1.9 mm.

[0028] The portable terminal may include a housing, a camera module disposed in the housing, and one or more other camera modules.

[0029] In another general aspect, the camera module includes a first barrel that houses a second barrel, an imaging lens system disposed in the second barrel, and an image sensor disposed in the first barrel and including an imaging surface disposed at an imaging plane of the imaging lens system, wherein the second barrel is movable to at least partially protrude from the first barrel, wherein the imaging lens system includes seven or more lenses, and wherein 0.15 < BFL / TTL and 1.9 mm < BFL are satisfied. Where BFL is the distance from the image side of the last lens closest to the image sensor to the imaging plane, and TTL is the distance from the object side of the foremost lens farthest from the image sensor to the imaging plane.

[0030] The seven or more lenses may at least include a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a negative refractive power, wherein the first lens to the sixth lens may be sequentially arranged from the object side.

[0031] Other features and aspects will be apparent from the following detailed description, the accompanying drawings, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of a portable terminal equipped with a camera module according to one or more exemplary embodiments.

[0033] Figure 2 and Figure 3 is a cross-sectional view of the portable terminal taken along line I-I' of Figure 1 .

[0034] Figure 4 and Figure 5 are enlarged views of the imaging lens systems shown in Figure 2 and Figure 3 respectively.

[0035] Figure 6 is a configuration diagram of an imaging lens system according to a first exemplary embodiment.

[0036] Figure 7 is Figure 6 the aberration curve of the imaging lens system shown in

[0037] Figure 8 is a configuration diagram of an imaging lens system according to a second exemplary embodiment.

[0038] Figure 9 is Figure 8 the aberration curve of the imaging lens system shown in

[0039] Figure 10 is a configuration diagram of an imaging lens system according to a third exemplary embodiment.

[0040] Figure 11 is Figure 10 the aberration curve of the imaging lens system shown in

[0041] Figure 12 is a configuration diagram of an imaging lens system according to a fourth exemplary embodiment.

[0042] Figure 13 is Figure 12 the aberration curve of the imaging lens system shown in

[0043] Figure 14It is a configuration diagram of an imaging lens system according to the fifth exemplary embodiment.

[0044] Figure 15 is Figure 14 the aberration curve of the imaging lens system shown.

[0045] Figure 16 It is a configuration diagram of an imaging lens system according to the sixth exemplary embodiment.

[0046] Figure 17 is Figure 16 the aberration curve of the imaging lens system shown.

[0047] Figure 18 It is a configuration diagram of an imaging lens system according to the seventh exemplary embodiment.

[0048] Figure 19 is Figure 18 the aberration curve of the imaging lens system shown.

[0049] Figure 20 It is a configuration diagram of an imaging lens system according to the eighth exemplary embodiment.

[0050] Figure 21 is Figure 20 the aberration curve of the imaging lens system shown.

[0051] Figure 22 It is a configuration diagram of an imaging lens system according to the ninth exemplary embodiment.

[0052] Figure 23 is Figure 22 the aberration curve of the imaging lens system shown.

[0053] Figure 24 It is a configuration diagram of an imaging lens system according to the tenth exemplary embodiment.

[0054] Figure 25 is Figure 24 the aberration curve of the imaging lens system shown.

[0055] In all the drawings and the detailed description, the same reference numerals denote the same elements. The drawings may not be drawn to scale, and for clarity, illustration, and convenience, the relative sizes, proportions, and descriptions of the elements in the drawings may be exaggerated. Detailed Description

[0056] Hereinafter, although the exemplary embodiments of the present disclosure have been described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.

[0057] The following specific embodiments are provided to assist the reader in fully understanding the methods, apparatuses, and / or systems described herein. However, after understanding the present disclosure, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, but rather may be changed, after understanding the present disclosure, except for operations that must occur in a certain order. Additionally, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0058] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. On the contrary, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the present disclosure.

[0059] In this document, it should be noted that the use of the term "may" with respect to an example or embodiment, such as what an example or embodiment may include or implement, means that there is at least one example or embodiment that includes or implements such a feature, and all examples and embodiments are not limited thereto.

[0060] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "coupled to" another element, it may be directly "on," "connected to," or "coupled to" the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly" "on," "directly connected to," or "directly coupled to" another element, there are no other elements intervening therebetween.

[0061] As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more thereof; similarly, "at least one of..." includes any one of the related listed items and any combination of any two or more thereof.

[0062] Although terms such as "first," "second," and "third" may be used herein to describe various components, assemblies, regions, layers, or portions, these components, assemblies, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer, or portion from another. Thus, a first component, first assembly, first region, first layer, or first portion referred to in an example may also be referred to as a second component, second assembly, second region, second layer, or second portion without departing from the teachings of the examples described herein.

[0063] In this document, for ease of description, spatial relative terms such as "above", "upper", "below", "lower", etc. may be used to describe the relationship between one element and another as shown in the accompanying drawings. In addition to the orientations shown in the drawings, such spatial relative terms are intended to also include different orientations of the device during use or operation. For example, if the device in the figure is flipped, an element described as "upper" or "above" another element will be "lower" or "below" another element. Thus, the term "above" includes both the upper and lower orientations, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein will be interpreted accordingly.

[0064] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the articles "a", "an", and "the" are intended to include the plural forms as well. The terms "comprising", "including", and "having" denote the presence of the 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.

[0065] Due to manufacturing techniques and / or tolerances, the shapes shown in the accompanying drawings may vary. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include shape variations that occur during manufacturing.

[0066] The features of the examples described herein may be combined in various ways, which will be apparent after obtaining an understanding of the disclosure. In addition, although the examples described herein have various configurations, other configurations are possible after obtaining an understanding of the disclosure.

[0067] The example embodiments described herein provide an imaging lens system configured to be mounted in a portable electronic device.

[0068] In the present disclosure, the first lens refers to the lens closest to the object (or subject), and depending on whether there are six lenses, seven lenses, or eight lenses in the lens system, the sixth lens, the seventh lens, or the eighth lens refers to the lens closest to the imaging surface (or image sensor). In the present disclosure, all radii of curvature, thicknesses, TTL (distance from the object side of the first lens to the imaging surface), 2ImgHT (diagonal length of the imaging surface), ImgHT (image height or 1 / 2 of 2ImgHT), and focal lengths are expressed in millimeters (mm).

[0069] The thickness of the lens, the distance between the lenses, and the TTL are distances along the optical axis of the lens. In addition, in the description of the lens shape, a convex shape of a surface means that the paraxial region of the corresponding surface is convex, while a concave shape of a surface means that the paraxial region of the corresponding surface is concave. Therefore, even if a surface of the lens is described as having a convex shape, the edge portion of the lens can be concave. Similarly, even if a surface of the lens is described as having a concave shape, the edge portion of the lens can be convex.

[0070] In addition to the first lens to the sixth lens, the seventh lens, or the eighth lens, the optical imaging system including the imaging lens system may further include other elements.

[0071] The optical imaging system may further include at least one aperture disposed in front of the first lens, or between any two adjacent lenses among the first lens to the sixth lens, the seventh lens, or the eighth lens, or between the sixth lens, the seventh lens, or the eighth lens and the imaging surface. The optical imaging system may include two or more apertures disposed at different positions.

[0072] The optical imaging system may further include an image sensor having an imaging surface disposed at the imaging surface of the imaging lens system. The image sensor converts the image of an object formed by the lenses of the imaging lens system on the effective imaging region of the imaging surface into an electrical signal.

[0073] The optical imaging system may further include an infrared blocking filter for blocking infrared light, hereinafter referred to as a filter. The filter may be disposed between the sixth lens, the seventh lens, or the eighth lens and the imaging surface.

[0074] The optical imaging system may further include at least one reflecting member having a reflecting surface that changes the direction of the optical path in the optical imaging system. For example, the reflecting member may be a prism or a mirror.

[0075] For example, the reflecting member may be disposed in the optical path on the object side of the first lens, between any two lenses among the second lens to the sixth lens, the seventh lens, or the eighth lens, or on the image side of the sixth lens, the seventh lens, or the eighth lens.

[0076] For example, the optical imaging system may further include a first reflecting member disposed in the optical path between the object side of the optical imaging system and the object surface of the first lens. Therefore, the first lens may be the lens closest to the first reflecting member among the first lens to the sixth lens, the seventh lens, or the eighth lens.

[0077] In addition, the optical imaging system may further include a second reflecting member disposed in the optical path between the image side of the sixth lens, the seventh lens, or the eighth lens and the imaging surface. Accordingly, the sixth lens, the seventh lens, or the eighth lens may be the lens closest to the second reflecting member among the first lens to the sixth lens, the seventh lens, or the eighth lens.

[0078] The imaging lens system described herein may be configured to be mounted in a portable electronic device. For example, the imaging lens system may be mounted in a smart phone, a notebook computer, an augmented reality (AR) device, a virtual reality (VR) device, a portable game console, etc. However, the scope of use and examples of the imaging lens system described in the present disclosure are not limited to the above-described electronic devices. For example, the imaging lens system may be applied to an electronic device that provides a narrow mounting space but requires high-resolution imaging.

[0079] The imaging lens system according to one or more example embodiments of the present disclosure 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, a seventh lens, and an eighth lens arranged in sequence from the object side. However, the lenses constituting the imaging lens system are not limited to eight lenses. For example, the imaging lens system may include no more than six lenses or no more than seven lenses.

[0080] The imaging lens system according to one aspect may be configured such that the distance BFL from the last lens to the imaging surface is formed to have a significant size. For example, in the imaging lens system described in the present disclosure, the distance BFL from the image side of the eighth lens, which is the last lens, to the imaging surface may be greater than 1.9 mm and less than 2.8 mm.

[0081] In addition, BFL may be configured to have a predetermined relationship with the length of the imaging lens system (the distance from the object side of the first lens, which is the foremost lens, to the imaging surface: TTL). For example, BFL / TTL may be greater than 0.15.

[0082] The imaging lens system according to another aspect of the present disclosure 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, a seventh lens, and an eighth lens arranged in sequence from the object side.

[0083] The imaging lens system according to another aspect may include a lens having a predetermined refractive power. For example, the imaging lens system according to the present example embodiment may include a first lens having a positive refractive power and a third lens having a positive refractive power.

[0084] In the imaging lens system according to this aspect, the distance from the first lens to the eighth lens can be formed to have a relatively large size. For example, the distance D18 from the object side surface of the first lens to the image side surface of the eighth lens can be significantly greater than the distance BFL from the image side surface of the eighth lens to the imaging surface. For detailed illustration, D18 / BFL can be greater than 2.0 and less than 4.2.

[0085] The imaging lens system according to another aspect of the present disclosure may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side. In addition, one or more of the following conditional expressions may be satisfied.

[0086] 25 < V1 - V2 < 45

[0087] -10 < V1 - V3 < 25

[0088] 25 < V1 - V4 < 50

[0089] -10 < V1 - V5 < 25

[0090] 0 < f1 / f < 2.0

[0091] -3.5 < f2 / f < 0

[0092] 1.5 < f3 / f

[0093] -100 < f4 / f < 300

[0094] f5 / f < 150

[0095] -10 < f6 / f < 10

[0096] 0 < f7 / f

[0097] f8 / f < 0

[0098] TTL / f < 1.5

[0099] -1.0 < f1 / f2 < 0

[0100] -2.0 < f2 / f3 < 0

[0101] BFL / f < 0.4

[0102] D12 / f < 0.3

[0103] TTL / 2ImgHT < 0.8

[0104] (TTL - BLF) / 2ImgHT < 0.65

[0105] 0.15 < BFL / TTL

[0106] In the above conditional expression, 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, V4 is the Abbe number of the fourth lens, V5 is the Abbe number of the fifth 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, 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, f8 is the focal length of the eighth lens, TTL is the distance from the object side surface of the first lens to the imaging surface, BFL is the distance from the image side surface of the eighth lens to the imaging surface, D12 is the distance from the image side surface of the first lens to the object side surface of the second lens, and 2ImgHT is the diagonal length of the imaging surface.

[0107] The imaging lens system can satisfy some of the above conditional expressions in the following further defined form.

[0108] 1.5 < f3 / f < 50

[0109] 10 < f5 / f < 150

[0110] 0 < f7 / f < 0.8

[0111] -1.0 < f8 / f < 0

[0112] 0.8 < TTL / f < 1.3

[0113] 0.19 < BFL / f < 0.40

[0114] 0 < D12 / f < 0.3

[0115] 0.6 < TTL / 2ImgHT < 0.8

[0116] 0.4 < (TTL - BLF) / 2ImgHT < 0.62

[0117] 0.15 < BFL / TTL < 0.4

[0118] The imaging lens system according to another aspect of the present disclosure may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side, and may satisfy one or more of the following conditional expressions.

[0119] 5.0 mm ≤ ImgHT ≤ 9.0 mm

[0120] 0.1 < T1 / ImgHT < 0.2

[0121] 0.2 < BFL / ImgHT < 0.5

[0122] 2.0 < DL1LP / BFL < 4.2

[0123] 0.6 < EPD / ImgHT < 0.8

[0124] 1.3 < EPD / BFL < 3.2

[0125] 1.1 < SUMT / SUMD < 2.3

[0126] 1.3 < SUMT / BFL < 3.0

[0127] 0.7 < SUMD / BFL < 2.6

[0128] In the above conditional expressions, ImgHT is the image height (the height of the imaging surface), T1 is the thickness of the first lens at the center of the optical axis, DL1LP is the distance from the object side surface of the first lens to the image side surface of the last lens (the lens closest to the imaging surface), EPD is the diameter of the entrance pupil, SUMT is the sum of the thicknesses of the first through eighth lenses, and SUMD is the sum of the air gaps between the lenses (i.e., the air gap between the first and second lenses, the air gap between the second and third lenses, the air gap between the third and fourth lenses, the air gap between the fourth and fifth lenses, the air gap between the fifth and sixth lenses, the air gap between the sixth and seventh lenses, and the air gap between the seventh and eighth lenses). For reference, the air gap between lenses is the distance from the image side surface of the lens on the front side (object side) to the object side surface of the lens on the rear side (image side).

[0129] The imaging lens system can satisfy some of the above conditional expressions in a further defined form as follows.

[0130] 0.62 < EPD / ImgHT < 0.72

[0131] 1.6 < EPD / BFL < 2.6

[0132] 1.4 < SUMT / SUMD < 2.0

[0133] 1.6 < SUMT / BFL < 2.4

[0134] 1.0 < SUMD / BFL < 2.0

[0135] The imaging lens system according to the above aspects can include one or more lenses having the following characteristics. For example, the imaging lens system according to the first aspect can include one of the first through eighth lenses according to the following characteristics. As another example, the imaging lens system according to the second aspect can include two or more of the first through eighth lenses according to the following characteristics. However, the imaging lens system according to the above aspects does not necessarily include lenses according to the following characteristics.

[0136] In the following, the characteristics of the first lens to the eighth lens are described.

[0137] The first lens has a refractive power. For example, the first lens may have a positive 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 a high light transmittance and excellent workability. For example, the first lens may be formed of a plastic material or a glass material. The first lens may be configured to have a predetermined refractive index. For example, the refractive index of the first lens may be less than 1.6. As an example, the refractive index of the first lens may be greater than 1.52 and less than 1.57. The first lens may have a predetermined Abbe number. For example, the Abbe number of the first lens may be less than 60. As an example, the Abbe number of the first lens may be greater than 53 and less than 58.

[0138] The second lens has a 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 of a material having a high light transmittance and excellent workability. For example, the second lens may be formed of a plastic material or a glass material. The second lens may be configured to have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.6. As an example, the refractive index of the second lens may be greater than 1.63 and less than 1.69. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be less than 30. As an example, the Abbe number of the second lens may be greater than 18 and less than 24.

[0139] The third lens has a refractive power. For example, the third lens may have a positive refractive power. The third lens includes a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having a high light transmittance and excellent workability. For example, the third lens may be formed of a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be less than 1.6. As an example, the refractive index of the third lens may be greater than 1.52 and less than 1.57. The third lens may have a predetermined Abbe number. For example, the Abbe number of the third lens may be less than 60. As an example, the Abbe number of the third lens may be greater than 53 and less than 58.

[0140] The fourth lens has a refractive power. One side of the fourth lens may be recessed. For example, the fourth lens may have a recessed image side. The fourth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be formed of a material having a high light transmittance and excellent processability. For example, the fourth lens may be formed of a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.6. As an example, the refractive index of the fourth lens may be greater than 1.60 and less than 1.69. The fourth lens may have a predetermined Abbe number. For example, the Abbe number of the fourth lens may be less than 30. As an example, the Abbe number of the fourth lens may be greater than 20 and less than 27.

[0141] The fifth lens has a refractive power. For example, the fifth lens may have a positive refractive power. The fifth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material having a high light transmittance and excellent processability. 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 less than 1.6. As an example, the refractive index of the fifth lens may be greater than 1.52 and less than 1.57. The fifth lens may have a predetermined Abbe number. For example, the Abbe number of the fifth lens may be less than 60. For example, the Abbe number of the fifth lens may be greater than 53 and less than 58.

[0142] The sixth lens has a refractive power. For example, the sixth lens may have a negative refractive power. The sixth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. One surface or both surfaces of the sixth lens may have an inflection point. For example, an inflection point may be formed on the object side and the image side of the sixth lens. In addition, a concave shape and a convex shape may be formed together on one surface or both surfaces of the sixth lens. For example, the optical axis portion of the sixth lens may be convex on the object side, and the peripheral portion of the optical axis of the sixth lens may be concave on the object side. As another example, the optical axis portion of the sixth lens may be concave on the image side, and the peripheral portion of the optical axis of the sixth lens may be convex on the image side. The sixth lens may be formed of a material having a high light transmittance and excellent processability. For example, the sixth lens may be formed of a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be less than 1.6. As an example, the refractive index of the sixth lens may be greater than 1.54 and less than 1.59. The sixth lens may have a predetermined Abbe number. For example, the Abbe number of the sixth lens may be less than 40. As an example, the Abbe number of the sixth lens may be greater than 30 and less than 40.

[0143] The seventh lens has a refractive power. The seventh lens includes a spherical surface or an aspherical surface. For example, both surfaces of the seventh lens can be aspherical. Inflection points can be formed on one or both surfaces of the seventh lens. For example, inflection points can be formed on the object side surface and the image side surface of the seventh lens. In addition, a concave shape and a convex shape can be formed together on one or both surfaces of the seventh lens. For example, the optical axis portion of the seventh lens can be convex on the object side surface, and the peripheral portion of the optical axis of the seventh lens can be concave on the object side surface. As another example, the optical axis portion of the seventh lens can be concave on the image side surface, and the peripheral portion of the optical axis of the seventh lens can be convex on the image side surface. The seventh lens can be formed of a material having a high light transmittance and excellent processability. For example, the seventh lens can be formed of a plastic material or a glass material. The seventh lens can be configured to have a predetermined refractive index. For example, the refractive index of the seventh lens can be less than 1.6. As an example, the refractive index of the seventh lens can be greater than 1.52 and less than 1.57. The seventh lens can have a predetermined Abbe number. For example, the Abbe number of the seventh lens can be less than 60. As an example, the Abbe number of the seventh lens can be greater than 53 and less than 58.

[0144] The eighth lens has a refractive power. The eighth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the eighth lens can be aspherical. Inflection points can be formed on one or both surfaces of the eighth lens. For example, inflection points can be formed on the object side surface and the image side surface of the eighth lens. In addition, a concave shape and a convex shape can be formed together on one or both surfaces of the eighth lens. For example, the optical axis portion of the eighth lens can be convex on the object side surface, and the peripheral portion of the optical axis of the eighth lens can be concave on the object side surface. As another example, the optical axis portion of the eighth lens can be concave on the object side surface, and the peripheral portion of the optical axis of the eighth lens can be convex on the object side surface. As another example, the optical axis portion of the eighth lens can be concave on the image side surface, and the peripheral portion of the optical axis of the eighth lens can be convex on the image side surface. The eighth lens can be formed of a material having a high light transmittance and excellent processability. For example, the eighth lens can be formed of a plastic material or a glass material. The eighth lens can be configured to have a predetermined refractive index. For example, the refractive index of the eighth lens can be less than 1.6. As an example, the refractive index of the eighth lens can be greater than 1.52 and less than 1.57. The eighth lens can have a predetermined Abbe number. For example, the Abbe number of the eighth lens can be less than 60. As an example, the Abbe number of the eighth lens can be greater than 53 and less than 58.

[0145] The first lens to the eighth lens may include a spherical surface or an aspherical surface as described above. When the first lens to the eighth lens include an aspherical surface, the aspherical surface of the corresponding lens can be represented by Equation 1.

[0146] Equation 1

[0147]

[0148] In Equation 1, c is the reciprocal of the radius of curvature of the corresponding lens, k is the conic constant, r is the distance from a point on the aspherical surface to the optical axis, A to H and J are aspherical constants, and Z (or SAG) is the height in the optical axis direction from a point on the aspherical surface to the vertex of the corresponding aspherical surface.

[0149] The imaging lens system according to one or more of the above exemplary embodiments or in the above form may further include a diaphragm and a filter. As an example, the imaging lens system may further include a diaphragm disposed between the second lens and the third lens or between the third lens and the fourth lens. As another example, the imaging lens system may further include a filter disposed between the eighth lens and the imaging surface. The diaphragm may be configured to adjust the amount of light incident in the direction of the imaging surface, and the filter may be configured to block light of a specific wavelength. As a reference, the filter described herein is configured to block infrared rays, but the light of the wavelength blocked by the filter is not limited to infrared rays.

[0150] The camera module according to the present disclosure may include one or more of the imaging lens systems according to the above aspects. As an example, the camera module may include an imaging lens system according to one aspect. As another example, the camera module may include an imaging lens system according to one aspect and an imaging lens system according to another aspect.

[0151] The camera module according to one form may be configured to have a variable size. Specifically, the distance CL from the foremost point of the camera module (e.g., the object side surface of the first lens) to the image sensor may vary according to the operating state of the camera module. For example, the distance CL in the operating state of the camera module may be greater than the distance CL in the non-operating state of the camera module.

[0152] The camera module according to another aspect may include an imaging lens system capable of changing the size of the camera module. For example, the camera module may include an imaging lens system including the first lens to the eighth lens arranged in sequence from the object side. In addition, the camera module may include an image sensor configured to convert an optical signal incident in the imaging lens system into an electrical signal.

[0153] The camera module can be configured to move the imaging lens system towards the image sensor. For example, the camera module can move the imaging lens system towards the image sensor for focus adjustment or focus magnification adjustment, and move the imaging lens system towards the image sensor side to reduce the size of the camera module. The moving displacement of the imaging lens system according to the latter can be greater than that according to the former. For detailed description, the moving displacement of the imaging lens system according to the latter can be represented by the following conditional expression.

[0154] 0.6 < (BFLx - BFLm) / BFLx < 0.8

[0155] In the above conditional expression, BFLx can be the distance from the image side of the last lens (the eighth lens in the case of an imaging lens system including eight lenses, and the sixth lens in the case of an imaging lens system including six lenses) to the image sensor in the state where the imaging lens system is positioned farthest from the image sensor, and BFLm is the distance from the image side of the last lens to the image sensor in the state where the imaging lens system is positioned closest to the image sensor.

[0156] As a reference, above, it is described that the imaging lens system constituting the camera module includes eight lenses, but the number of lenses constituting the imaging lens system is not limited to eight lenses. For example, the imaging lens system constituting the camera module according to the exemplary embodiment can include six or seven lenses.

[0157] According to another form, the camera module can satisfy the above conditional expression 0.6 < (BFLx - BFLm) / BFLx < 0.8 for easy installation in a thinned form, and further satisfy other conditions for achieving high resolution. For example, the camera module can include an image sensor with a significant size to facilitate high resolution. Specifically, the image height (height of the imaging surface) that can be substantially formed in the image sensor can be from 5.0 mm to 9.0 mm.

[0158] Hereinafter, refer to Figures 1 to 5 Describe an example of the camera module.

[0159] As Figure 1 shown, the camera module 20 according to the exemplary embodiment can be mounted on the portable terminal 1000. Specifically, the camera module 20 according to the present exemplary embodiment can be mounted together with another type of camera module 10 on one surface of the portable terminal 1000. However, the object on which the camera module 20 can be mounted is not limited to the portable terminal.

[0160] The portable terminal 1000 can include a housing 1002. The camera module 20 according to the exemplary embodiment can be mounted in the housing 1002 of the portable terminal 1000 (Figure 2 and Figure 3 )。

[0161] The camera module 20 according to the exemplary embodiment may be configured to achieve a predetermined viewing angle. For example, the viewing angle of the camera module 20 may be wider than that of the other camera module 10. Specifically, the camera module 20 according to the exemplary embodiment may be configured to capture an image of an object located within a short distance while having a higher resolution than that of the camera module 10.

[0162] The camera module 20 may include an imaging lens system 22, a first barrel 24, a second barrel 26, and an image sensor IS. However, the configuration of the camera module 20 is not limited to the above components. For example, the camera module 20 may further include a driving unit for driving the second barrel 26.

[0163] The camera module 20 may be configured such that the length CL in the optical axis direction is variable. For example, the length of the camera module 20 in the optical axis direction may be reduced from Figure 2 the state shown in Figure 3 to the state shown in Figure 3 Conversely, the length of the camera module 20 in the optical axis direction may be extended from Figure 2 the state shown in

[0164] 0.6 < (BFLx - BFLm) / BFLx < 0.8

[0165] The camera module 20 may include an imaging lens system 22. For example, the camera module 20 may include an imaging lens system 22 that includes eight lenses. However, the configuration of the imaging lens system 22 is not limited to eight lenses. For example, the imaging lens system 22 may include six or seven lenses.

[0166] As Figure 4 and Figure 5As shown, the imaging lens system 22 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. However, the configuration of the imaging lens system 22 is not limited to eight lenses. For example, the imaging lens system 22 may include fewer than eight lenses. As an example, the imaging lens system 22 may include six lenses. In addition, the imaging lens system 22 may further include a filter IF.

[0167] The first lens L1 to the eighth lens L8 may be sequentially arranged in the optical axis direction. For example, the second lens L2 may be disposed on the image side of the first lens L1, and the third lens L3 may be disposed on the image side of the second lens L2. Thus, in the imaging lens system 22 according to the present exemplary embodiment, except for the filter IF or the image sensor IS, no optical element is disposed on the image side of the eighth lens L8 which is the last lens. The first lens L1 to the eighth lens L8 are configured to image incident light at a specific position. For example, the light refracted by the first lens L1 to the eighth lens L8 may be imaged on the imaging plane IP formed in the image sensor IS.

[0168] The imaging lens system 22 may be configured to have sufficient space to move in the optical axis direction. Specifically, the imaging lens system 22 may be configured to have a relatively large back focal length (i.e., the distance from the image side surface of the eighth lens L8 to the imaging plane IP: BFL). For example, the BFL of the imaging lens system 22 may be greater than 1.9 mm and less than 2.8 mm. The BFL of the imaging lens system 22 may increase or decrease proportionally to the length of the imaging lens system 22. For example, the ratio (BFL / TTL) between the BFL of the imaging lens system 22 and the length of the imaging lens system 22 (TTL: the distance from the object side surface of the first lens L1 to the imaging plane IP) may be greater than 0.15.

[0169] The BFL of the imaging lens system 22 may be used as a space for avoiding the first lens L1 to the eighth lens L8 in the direction of the imaging plane IP. For example, the first lens L1 to the eighth lens L8 may move a dimension corresponding to the BFL in the direction toward the imaging plane IP. As a reference, the BFL of the imaging lens system 22 may have substantially the same dimension as the BFLx of the camera module 20. However, the BFL and the BFLx do not have to be formed to have the same dimension. For example, when the imaging plane IP is formed within the image sensor IS, the BFL may be greater than the BFLx.

[0170] The imaging lens system 22 may be configured to achieve high resolution. For example, the imaging lens system 22 may be configured to form an imaging plane IP having a relatively large size. For example, the image height of the imaging plane IP may be 5.0 mm to 9.0 mm.

[0171] The length of the camera module 20 can be changed by a plurality of lens barrels 24 and 26. For example, the length CL of the camera module 20 can be changed by driving the second lens barrel 26 accommodated in the first lens barrel 24 in the optical axis direction.

[0172] The first lens barrel 24 can be configured to receive the second lens barrel 26 and the image sensor IS. In addition, the first lens barrel 24 can also accommodate a drive unit required to drive the second lens barrel 26. However, the components accommodated in the first lens barrel 24 are not limited to the second lens barrel 26, the image sensor IS, and the drive unit.

[0173] The second lens barrel 26 can be disposed in the first lens barrel 24 and can be configured to accommodate the imaging lens system 22. The second lens barrel 26 can be configured to move in the optical axis direction. For example, the second lens barrel 26 can move toward the object or toward the image sensor IS in a state of accommodating the imaging lens system 22. According to the moving direction, the second lens barrel 26 can partially protrude from the first lens barrel 24 or be completely retracted into the interior of the first lens barrel 24. For example, when the second lens barrel 26 moves toward the object, the second lens barrel 26 can protrude outside the first lens barrel 24, and when the second lens barrel 26 moves toward the image sensor IS, the second lens barrel 26 can be retracted into the interior of the first lens barrel 24.

[0174] The drive unit (not shown) can be configured to move the second lens barrel 26 in the optical axis direction. For example, the drive unit can move the second lens barrel 26 in the optical axis direction by a drive magnet and a drive coil. However, the components of the drive unit are not limited to the drive magnet and the drive coil.

[0175] The camera module 20 configured as described above can capture images with high resolution. For example, the camera module 20 can achieve the use of a large image sensor IS by forming a sufficient distance and space between the imaging lens system 22 and the image sensor IS. In addition, the camera module 20 can be configured to facilitate thinning. For example, the size of the camera module 20 can be reduced by changing the length CL in the optical axis direction as described above. Therefore, the camera module 20 according to the present exemplary embodiment can be easily mounted in a small and thin electronic device.

[0176] Hereinafter, a specific exemplary embodiment of an imaging lens system that can make the camera module thinner will be described with reference to the drawings.

[0177] First, refer to Figure 6 Describe the imaging lens system according to the first exemplary embodiment.

[0178] 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, a seventh lens 170, and an eighth lens 180.

[0179] The first lens 110 has a positive refractive power and has a convex object side and a concave image side. The second lens 120 has a negative refractive power and has a convex object side and a concave image side. The third lens 130 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 140 has a negative refractive power and has a convex object side and a concave image side. The fifth lens 150 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 160 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 160. The seventh lens 170 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 170. The eighth lens 180 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 180.

[0180] The imaging lens system 100 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 120 and the third lens 130, or between the third lens 130 and the fourth lens 140. The filter IF may be disposed between the eighth lens 180 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where the light incident from the first lens 110 to the eighth lens 180 is imaged. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or formed within the image sensor IS.

[0181] The imaging lens system 100 configured as described above may exhibit Figure 7 the aberration characteristics in the form shown. Tables 1 and 2 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0182] Table 1

[0183]

[0184]

[0185] Table 2

[0186] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -1.14.E+00 9.54.E+01 9.96.E+00 7.11.E-01 4.69.E+01 9.50.E+01 6.57.E+01 -7.31.E+01 A 6.96.E-03 -2.82.E-02 -3.42.E-02 -1.06.E-02 2.13.E-02 -2.90.E-03 -3.10.E-02 2.42.E-03 B -8.61.E-03 1.39.E-01 1.41.E-01 3.64.E-02 -1.16.E-01 1.77.E-02 1.09.E-01 -6.27.E-02 C 1.38.E-02 -3.53.E-01 -3.80.E-01 -1.43.E-01 3.57.E-01 -1.33.E-01 -4.37.E-01 1.60.E-01 D -1.33.E-02 5.46.E-01 6.16.E-01 3.14.E-01 -7.22.E-01 4.12.E-01 1.06.E+00 -2.73.E-01 E 8.44.E-03 -5.66.E-01 -6.65.E-01 -4.59.E-01 9.87.E-01 -7.84.E-01 -1.72.E+00 3.14.E-01 F -3.69.E-03 4.13.E-01 5.05.E-01 4.71.E-01 -9.47.E-01 9.96.E-01 1.95.E+00 -2.54.E-01 G 1.15.E-03 -2.18.E-01 -2.78.E-01 -3.48.E-01 6.53.E-01 -8.81.E-01 -1.58.E+00 1.47.E-01 H -2.58.E-04 8.40.E-02 1.11.E-01 1.87.E-01 -3.29.E-01 5.53.E-01 9.27.E-01 -6.19.E-02 J 4.20.E-05 -2.37.E-02 -3.27.E-02 -7.30.E-02 1.21.E-01 -2.48.E-01 -3.94.E-01 1.90.E-02 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K -6.86.E+01 7.01.E+01 1.81.E+01 -2.79.E+01 -1.10.E+01 1.65.E+01 5.11.E+01 -1.01.E+01 A 4.57.E-04 1.80.E-02 7.06.E-03 -5.37.E-02 4.11.E-02 5.53.E-02 -8.35.E-02 -5.15.E-02 B 1.10.E-02 -2.38.E-02 3.08.E-03 2.03.E-02 -6.25.E-02 -4.40.E-02 2.99.E-02 2.01.E-02 C -5.81.E-02 -7.44.E-03 -1.42.E-02 -2.89.E-04 4.57.E-02 2.34.E-02 -7.42.E-03 -5.86.E-03 D 9.56.E-02 3.15.E-02 1.31.E-02 -4.99.E-03 -2.38.E-02 -9.87.E-03 1.81.E-03 1.29.E-03 E -9.51.E-02 -3.49.E-02 -7.60.E-03 3.22.E-03 8.49.E-03 3.08.E-03 -3.94.E-04 -2.18.E-04 F 6.47.E-02 2.39.E-02 3.10.E-03 -1.13.E-03 -2.12.E-03 -6.95.E-04 6.36.E-05 2.78.E-05 G -3.15.E-02 -1.13.E-02 -9.26.E-04 2.56.E-04 3.77.E-04 1.14.E-04 -7.24.E-06 -2.66.E-06 H 1.12.E-02 3.81.E-03 2.04.E-04 -3.96.E-05 -4.86.E-05 -1.36.E-05 5.83.E-07 1.88.E-07 J -2.91.E-03 -9.18.E-04 -3.31.E-05 4.27.E-06 4.53.E-06 1.19.E-06 -3.33.E-08 -9.79.E-09

[0187] Reference Figure 8 to describe the imaging lens system according to the second exemplary embodiment.

[0188] 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, a seventh lens 270, and an eighth lens 280.

[0189] The first lens 210 has a positive refractive power and has a convex object side and a concave image side. The second lens 220 has a negative refractive power and has a convex object side and a concave image side. The third lens 230 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 240 has a negative refractive power and has a convex object side and a concave image side. The fifth lens 250 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 260 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 260. The seventh lens 270 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 270. The eighth lens 280 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 280.

[0190] The imaging lens system 200 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 220 and the third lens 230, or disposed between the third lens 230 and the fourth lens 240. The filter IF may be disposed between the eighth lens 280 and the imaging surface IP. As a reference, if necessary, the diaphragm ST and the filter IF may be omitted. The imaging surface IP may be formed at a position where the light incident from the first lens 210 to the eighth lens 280 is imaged. For example, the imaging surface IP may be formed on one surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0191] The imaging lens system 200 configured as described above may exhibit Figure 9 the aberration characteristics shown in the form. Tables 3 and 4 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0192] Table 3

[0193]

[0194]

[0195] Table 4

[0196] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -1.02.E+00 7.01.E+01 1.47.E+01 1.56.E+00 4.76.E+01 9.50.E+01 6.57.E+01 6.94.E+01 A 7.79.E-03 -3.36.E-02 -3.70.E-02 -4.33.E-03 -4.02.E-03 -9.50.E-03 -1.59.E-02 3.49.E-03 B -1.53.E-02 7.58.E-02 6.63.E-02 -3.16.E-02 -1.19.E-02 8.50.E-03 4.13.E-02 -5.58.E-02 C 3.37.E-02 -1.26.E-01 -9.46.E-02 1.45.E-01 3.01.E-02 -5.43.E-02 -2.02.E-01 1.58.E-01 D -4.64.E-02 1.51.E-01 8.90.E-02 -3.67.E-01 -8.70.E-02 1.20.E-01 5.23.E-01 -2.90.E-01 E 4.30.E-02 -1.31.E-01 -4.88.E-02 5.96.E-01 1.74.E-01 -1.68.E-01 -8.70.E-01 3.56.E-01 F -2.80.E-02 8.33.E-02 8.10.E-03 -6.62.E-01 -2.33.E-01 1.62.E-01 9.92.E-01 -3.03.E-01 G 1.31.E-02 -3.95.E-02 9.63.E-03 5.20.E-01 2.15.E-01 -1.13.E-01 -8.01.E-01 1.84.E-01 H -4.46.E-03 1.39.E-02 -9.16.E-03 -2.94.E-01 -1.39.E-01 5.83.E-02 4.65.E-01 -8.07.E-02 J 1.10.E-03 -3.62.E-03 4.19.E-03 1.20.E-01 6.42.E-02 -2.21.E-02 -1.95.E-01 2.56.E-02 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K -5.88.E+01 7.01.E+01 1.81.E+01 -4.65.E+01 -8.05.E+00 1.65.E+01 5.11.E+01 -1.16.E+01 A -2.01.E-03 -6.52.E-03 -7.02.E-02 -1.21.E-01 -9.46.E-03 6.02.E-02 -3.68.E-02 -3.64.E-02 B 1.19.E-02 2.36.E-02 1.13.E-01 8.79.E-02 -1.03.E-02 -4.69.E-02 3.37.E-03 8.87.E-03 C -3.96.E-02 -3.36.E-02 -1.18.E-01 -4.60.E-02 7.89.E-03 2.07.E-02 1.82.E-03 -1.52.E-03 D 5.48.E-02 2.36.E-02 9.48.E-02 1.83.E-02 -4.08.E-03 -6.64.E-03 -6.97.E-04 1.96.E-04 E -4.93.E-02 -1.21.E-02 -6.05.E-02 -5.52.E-03 1.49.E-03 1.61.E-03 1.23.E-04 -2.19.E-05 F 3.09.E-02 5.39.E-03 2.99.E-02 1.21.E-03 -4.03.E-04 -2.98.E-04 -1.33.E-05 2.52.E-06 G -1.38.E-02 -2.12.E-03 -1.11.E-02 -1.86.E-04 8.12.E-05 4.26.E-05 9.28.E-07 -2.81.E-07 H 4.32.E-03 6.78.E-04 3.09.E-03 1.98.E-05 -1.23.E-05 -4.69.E-06 -4.12.E-08 2.51.E-08 J -9.46.E-04 -1.64.E-04 -6.28.E-04 -1.45.E-06 1.39.E-06 3.93.E-07 1.02.E-09 -1.62.E-09

[0197] Reference Figure 10Describe an imaging lens system according to a third exemplary embodiment.

[0198] 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, a seventh lens 370, and an eighth lens 380.

[0199] The first lens 310 has a positive refractive power and has a convex object side and a concave image side. The second lens 320 has a negative refractive power and has a convex object side and a concave image side. The third lens 330 has a positive refractive power and has a convex object side and a convex image side. The fourth lens 340 has a negative refractive power and has a concave object side and a convex image side. The fifth lens 350 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 360 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 360. The seventh lens 370 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 370. The eighth lens 380 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 380.

[0200] The imaging lens system 300 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 320 and the third lens 330, or between the third lens 330 and the fourth lens 340. The filter IF may be disposed between the eighth lens 380 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where light incident from the first lens 310 to the eighth lens 380 is imaged. For example, the imaging surface IP may be formed on one surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0201] The imaging lens system 300 configured as described above may exhibit Figure 11 the aberration characteristics shown in the form. Tables 5 and 6 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0202] Table 5

[0203]

[0204]

[0205] Table 6

[0206] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -9.54.E-01 4.25.E+01 1.35.E+01 2.15.E+00 4.76.E+01 9.50.E+01 6.57.E+01 7.56.E+01 A 2.93.E-03 -7.15.E-03 -1.16.E-02 -5.53.E-03 -1.17.E-02 -1.17.E-02 -9.53.E-03 -3.93.E-03 B 5.14.E-03 3.18.E-03 2.22.E-03 -4.93.E-03 2.09.E-03 -8.59.E-03 2.56.E-03 -5.20.E-03 C -1.06.E-02 -6.83.E-03 -5.40.E-03 2.45.E-02 -9.72.E-03 1.42.E-02 -3.94.E-02 -3.18.E-03 D 1.55.E-02 1.18.E-02 1.24.E-02 -7.26.E-02 4.97.E-03 -2.73.E-02 1.14.E-01 1.51.E-02 E -1.55.E-02 -1.18.E-02 -1.40.E-02 1.44.E-01 2.73.E-02 3.89.E-02 -2.05.E-01 -2.33.E-02 F 1.11.E-02 7.57.E-03 1.00.E-02 -1.93.E-01 -7.35.E-02 -3.86.E-02 2.48.E-01 2.19.E-02 G -5.72.E-03 -3.25.E-03 -4.85.E-03 1.81.E-01 9.69.E-02 2.69.E-02 -2.12.E-01 -1.41.E-02 H 2.15.E-03 9.17.E-04 1.60.E-03 -1.21.E-01 -8.07.E-02 -1.31.E-02 1.30.E-01 6.54.E-03 J -5.91.E-04 -1.52.E-04 -3.41.E-04 5.81.E-02 4.53.E-02 4.29.E-03 -5.74.E-02 -2.19.E-03 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K 9.13.E+01 7.01.E+01 1.81.E+01 -5.13.E+01 -6.81.E+00 1.65.E+01 5.11.E+01 -1.22.E+01 A 2.09.E-02 3.38.E-02 -7.61.E-02 -1.45.E-01 -8.36.E-03 6.19.E-02 -5.33.E-02 -4.17.E-02 B -3.89.E-02 -3.18.E-02 1.24.E-01 1.20.E-01 -2.24.E-03 -4.32.E-02 1.45.E-02 1.33.E-02 C 2.32.E-02 4.48.E-03 -1.27.E-01 -7.64.E-02 -3.65.E-04 1.61.E-02 -3.14.E-03 -3.33.E-03 D -9.34.E-03 4.07.E-03 8.90.E-02 3.88.E-02 4.11.E-04 -4.09.E-03 8.88.E-04 6.76.E-04 E 4.21.E-03 -1.64.E-03 -4.58.E-02 -1.55.E-02 -1.94.E-04 6.57.E-04 -2.24.E-04 -1.11.E-04 F -2.59.E-03 -7.09.E-04 1.75.E-02 4.81.E-03 5.78.E-05 -5.07.E-05 3.99.E-05 1.43.E-05 G 1.39.E-03 8.65.E-04 -4.98.E-03 -1.14.E-03 -1.21.E-05 -3.17.E-06 -4.91.E-06 -1.44.E-06 H -5.18.E-04 -3.80.E-04 1.05.E-03 2.05.E-04 1.90.E-06 1.40.E-06 4.28.E-07 1.10.E-07 J 1.30.E-04 9.84.E-05 -1.63.E-04 -2.73.E-05 -2.28.E-07 -1.91.E-07 -2.66.E-08 -6.20.E-09

[0207] Reference Figure 12 Describe an imaging lens system according to a fourth exemplary embodiment.

[0208] 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, a seventh lens 470, and an eighth lens 480.

[0209] The first lens 410 has a positive refractive power and has a convex object side and a concave image side. The second lens 420 has a negative refractive power and has a convex object side and a concave image side. The third lens 430 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 440 has a negative refractive power and has a concave object side and a concave image side. The fifth lens 450 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 460 has a negative refractive power and has a convex object side and a concave image side. Further, inflection points are formed on the object side and the image side of the sixth lens 460. The seventh lens 470 has a positive refractive power and has a convex object side and a concave image side. Further, inflection points are formed on the object side and the image side of the seventh lens 470. The eighth lens 480 has a negative refractive power and has a concave object side and a concave image side. Further, inflection points are formed on the object side and the image side of the eighth lens 480.

[0210] The imaging lens system 400 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 420 and the third lens 430, or between the third lens 430 and the fourth lens 440. The filter IF may be disposed between the eighth lens 480 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where light incident from the first lens 410 to the eighth lens 480 is imaged. For example, the imaging surface IP may be formed on one surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0211] The imaging lens system 400 configured as described above may exhibit Figure 13 the aberration characteristics shown in the form. Tables 7 and 8 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0212] Table 7

[0213]

[0214]

[0215] Table 8

[0216]

[0217]

[0218] Reference Figure 14 Describe an imaging lens system according to a fifth exemplary embodiment.

[0219] 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, a seventh lens 570, and an eighth lens 580.

[0220] The first lens 510 has a positive refractive power and has a convex object side and a concave image side. The second lens 520 has a negative refractive power and has a convex object side and a concave image side. The third lens 530 has a positive refractive power and has a concave object side and a convex image side. The fourth lens 540 has a positive refractive power and has a convex object side and a concave image side. The fifth lens 550 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 560 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 560. The seventh lens 570 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 570. The eighth lens 580 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 580.

[0221] The imaging lens system 500 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 520 and the third lens 530, or between the third lens 530 and the fourth lens 540. The filter IF may be disposed between the eighth lens 580 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where light incident from the first lens 510 to the eighth lens 580 is imaged. For example, the imaging surface IP may be formed on a surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0222] The imaging lens system 500 configured as described above may exhibit Figure 15 the aberration characteristics in the form shown. Tables 9 and 10 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0223] Table 9

[0224] Surface number Annotation Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 3.390 1.300 1.546 56.0 S2 31.463 0.040 S3 Second lens 9.048 0.345 1.656 21.5 S4 4.472 0.703 S5 Third lens -46.133 0.419 1.546 56.0 S6 -21.588 0.153 S7 Fourth lens 24.794 0.543 1.667 20.4 S8 27.878 0.929 S9 Fifth lens -78.317 0.400 1.546 56.0 S10 -30.771 0.302 S11 Sixth lens 14.560 0.420 1.570 37.4 S12 3.330 0.203 S13 Seventh lens 2.045 0.520 1.546 56.0 S14 19.464 0.742 S15 Eighth lens 39.967 0.520 1.537 55.7 S16 2.943 1.590 S17 Filter 0.210 1.518 64.2 S18 0.375 S19 Imaging surface 0.015

[0225] Table 10

[0226]

[0227]

[0228] Reference Figure 16 Describe an imaging lens system according to a sixth exemplary embodiment.

[0229] 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, a seventh lens 670, and an eighth lens 680.

[0230] The first lens 610 has a positive refractive power and has a convex object side and a concave image side. The second lens 620 has a negative refractive power and has a convex object side and a concave image side. The third lens 630 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 640 has a positive refractive power and has a concave object side and a convex image side. The fifth lens 650 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 660 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 660. The seventh lens 670 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 670. The eighth lens 680 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 680.

[0231] The imaging lens system 600 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 620 and the third lens 630, or between the third lens 630 and the fourth lens 640. The filter IF may be disposed between the eighth lens 680 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where light incident from the first lens 610 to the eighth lens 680 is imaged. For example, the imaging surface IP may be formed on one surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0232] The imaging lens system 600 configured as described above may exhibit Figure 17 the aberration characteristics shown in the form. Tables 11 and 12 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0233] Table 11

[0234] Surface number Annotation Radius of curvature Thickness / distance Refractive index Abbe number S1 First lens 2.957 1.223 1.546 56.0 S2 18.307 0.066 S3 Second lens 9.009 0.250 1.667 20.4 S4 4.531 0.569 S5 Third lens 59.645 0.335 1.546 56.0 S6 84.387 0.282 S7 Fourth lens -31.496 0.623 1.644 23.5 S8 -30.604 0.500 S9 Fifth lens -54.898 0.343 1.546 56.0 S10 -38.968 0.298 S11 Sixth lens 23.468 0.414 1.570 37.4 S12 3.636 0.286 S13 Seventh lens 1.892 0.551 1.546 56.0 S14 17.196 0.633 S15 Eighth lens -34.440 0.458 1.546 56.0 S16 3.321 1.943 S17 Filter 0.210 1.518 64.2 S18 0.379 S19 Imaging surface 0.011

[0235] Table 12

[0236]

[0237]

[0238] Reference Figure 18 Describe an imaging lens system according to a seventh exemplary embodiment.

[0239] 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, a seventh lens 770, and an eighth lens 780.

[0240] The first lens 710 has a positive refractive power and has a convex object side and a concave image side. The second lens 720 has a negative refractive power and has a convex object side and a concave image side. The third lens 730 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 740 has a negative refractive power and has a concave object side and a convex image side. The fifth lens 750 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 760 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 760. The seventh lens 770 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 770. The eighth lens 780 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 780.

[0241] The imaging lens system 700 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 720 and the third lens 730, or between the third lens 730 and the fourth lens 740. The filter IF may be disposed between the eighth lens 780 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where light incident from the first lens 710 to the eighth lens 780 is imaged. For example, the imaging surface IP may be formed on one surface of an image sensor IS of a camera module, or formed within the image sensor IS.

[0242] The imaging lens system 700 configured as described above may exhibit Figure 19The aberration characteristics of the shown form. Tables 13 and 14 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0243] Table 13

[0244]

[0245]

[0246] Table 14

[0247] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -9.61.E-01 4.22.E+01 1.35.E+01 2.12.E+00 4.76.E+01 9.50.E+01 6.57.E+01 8.43.E+01 A 5.06.E-03 -1.25.E-02 -1.97.E-02 -9.75.E-03 -1.95.E-02 -2.00.E-02 -1.74.E-02 -8.27.E-03 B 1.12.E-02 8.76.E-03 4.52.E-03 -1.01.E-02 3.48.E-03 -1.42.E-02 2.11.E-02 -1.16.E-03 C -3.18.E-02 -2.13.E-02 -1.78.E-03 7.59.E-02 -3.64.E-02 8.85.E-03 -2.15.E-01 -5.86.E-02 D 6.38.E-02 4.47.E-02 -5.68.E-03 -3.14.E-01 8.13.E-02 9.02.E-03 8.21.E-01 1.93.E-01 E -8.85.E-02 -5.75.E-02 4.39.E-02 8.59.E-01 -4.78.E-02 -4.77.E-02 -2.01.E+00 -3.59.E-01 F 8.73.E-02 4.85.E-02 -9.82.E-02 -1.60.E+00 -1.76.E-01 9.27.E-02 3.35.E+00 4.41.E-01 G -6.23.E-02 -2.77.E-02 1.25.E-01 2.09.E+00 5.32.E-01 -1.12.E-01 -3.97.E+00 -3.83.E-01 H 3.24.E-02 1.04.E-02 -1.05.E-01 -1.96.E+00 -7.53.E-01 9.54.E-02 3.39.E+00 2.42.E-01 J -1.23.E-02 -2.20.E-03 6.13.E-02 1.33.E+00 6.66.E-01 -6.03.E-02 -2.10.E+00 -1.11.E-01 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K 9.60.E+01 7.01.E+01 1.81.E+01 -4.75.E+01 -6.73.E+00 1.65.E+01 5.11.E+01 -1.20.E+01 A 3.67.E-02 5.75.E-02 -1.32.E-01 -2.43.E-01 -1.40.E-02 1.06.E-01 -8.75.E-02 -6.99.E-02 B -9.30.E-02 -7.66.E-02 3.10.E-01 2.77.E-01 -5.15.E-03 -1.09.E-01 3.04.E-02 3.12.E-02 C 5.72.E-02 2.13.E-02 -4.67.E-01 -2.39.E-01 -1.65.E-03 6.13.E-02 -6.53.E-03 -1.07.E-02 D 1.86.E-02 -4.25.E-03 4.95.E-01 1.60.E-01 2.32.E-03 -2.43.E-02 2.00.E-03 2.93.E-03 E -7.22.E-02 3.22.E-02 -3.95.E-01 -8.41.E-02 -1.51.E-03 6.72.E-03 -7.34.E-04 -6.64.E-04 F 8.01.E-02 -5.42.E-02 2.40.E-01 3.43.E-02 6.27.E-04 -1.25.E-03 1.98.E-04 1.24.E-04 G -5.75.E-02 4.62.E-02 -1.12.E-01 -1.08.E-02 -1.82.E-04 1.43.E-04 -3.64.E-05 -1.83.E-05 H 2.97.E-02 -2.46.E-02 3.93.E-02 2.59.E-03 3.92.E-05 -5.73.E-06 4.64.E-06 2.09.E-06 J -1.13.E-02 8.83.E-03 -1.03.E-02 -4.67.E-04 -6.41.E-06 -1.04.E-06 -4.19.E-07 -1.78.E-07

[0248] Reference Figure 20 Describe the imaging lens system according to the eighth exemplary embodiment.

[0249] 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, a seventh lens 870, and an eighth lens 880.

[0250] The first lens 810 has a positive refractive power and has a convex object side and a concave image side. The second lens 820 has a negative refractive power and has a convex object side and a concave image side. The third lens 830 has a positive refractive power and has a concave object side and a convex image side. The fourth lens 840 has a negative refractive power and has a concave object side and a convex image side. The fifth lens 850 has a positive refractive power and has a concave object side and a convex image side. The sixth lens 860 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 860. The seventh lens 870 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 870. The eighth lens 880 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 880.

[0251] The imaging lens system 800 may further include a diaphragm ST (not shown), a filter IF, and an imaging surface IP. For example, the diaphragm ST may be disposed between the second lens 820 and the third lens 830, or between the third lens 830 and the fourth lens 840. The filter IF may be disposed between the eighth lens 880 and the imaging surface IP. As a reference, the diaphragm ST and the filter IF may be omitted if necessary. The imaging surface IP may be formed at a position where the light incident from the first lens 810 to the eighth lens 880 is imaged. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or formed within the image sensor IS.

[0252] The imaging lens system 800 configured as described above can exhibit Figure 21 aberration characteristics in the form shown. Tables 15 and 16 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0253] Table 15

[0254]

[0255]

[0256] Table 16

[0257] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -9.95.E-01 4.22.E+01 1.34.E+01 1.93.E+00 4.76.E+01 9.50.E+01 6.57.E+01 7.23.E+01 A 5.64.E-03 -3.77.E-03 -6.50.E-03 -3.42.E-03 -5.19.E-03 -4.29.E-03 -6.71.E-03 1.04.E-03 B -5.69.E-03 2.28.E-04 3.44.E-04 -5.42.E-04 -3.18.E-03 -8.06.E-03 2.21.E-03 -1.75.E-02 C 5.33.E-03 1.31.E-03 1.40.E-03 -1.86.E-04 3.48.E-03 1.11.E-02 1.39.E-03 2.76.E-02 D -3.09.E-03 -1.92.E-03 -1.97.E-03 3.16.E-03 -3.45.E-03 -1.31.E-02 -1.61.E-02 -2.91.E-02 E 1.20.E-03 1.69.E-03 1.95.E-03 -5.48.E-03 2.37.E-03 1.12.E-02 2.88.E-02 2.12.E-02 F -3.24.E-04 -1.02.E-03 -1.35.E-03 5.31.E-03 -9.04.E-04 -6.94.E-03 -2.81.E-02 -1.10.E-02 G 6.43.E-05 4.28.E-04 6.58.E-04 -3.38.E-03 3.50.E-05 3.14.E-03 1.76.E-02 4.11.E-03 H -9.92.E-06 -1.28.E-04 -2.26.E-04 1.49.E-03 1.61.E-04 -1.04.E-03 -7.53.E-03 -1.12.E-03 J 1.28.E-06 2.71.E-05 5.47.E-05 -4.67.E-04 -9.51.E-05 2.51.E-04 2.25.E-03 2.20.E-04 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K 7.15.E+01 7.01.E+01 1.81.E+01 -4.99.E+01 -7.45.E+00 1.65.E+01 5.11.E+01 -1.49.E+01 A 7.53.E-03 2.83.E-02 -6.20.E-02 -1.04.E-01 -2.12.E-03 4.17.E-02 -4.17.E-02 -2.97.E-02 B -1.58.E-02 -3.64.E-02 7.91.E-02 6.22.E-02 -1.09.E-02 -3.09.E-02 1.27.E-02 9.71.E-03 C 2.79.E-03 3.63.E-02 -6.14.E-02 -2.52.E-02 8.18.E-03 1.58.E-02 -2.59.E-03 -2.53.E-03 D 7.62.E-03 -3.01.E-02 3.52.E-02 7.74.E-03 -3.38.E-03 -5.83.E-03 3.86.E-04 4.88.E-04 E -9.15.E-03 1.75.E-02 -1.58.E-02 -1.92.E-03 7.78.E-04 1.47.E-03 -4.10.E-05 -6.90.E-05 F 5.70.E-03 -7.14.E-03 5.49.E-03 3.84.E-04 -9.97.E-05 -2.56.E-04 3.11.E-06 7.17.E-06 G -2.32.E-03 2.10.E-03 -1.44.E-03 -6.00.E-05 5.15.E-06 3.18.E-05 -1.73.E-07 -5.51.E-07 H 6.56.E-04 -4.50.E-04 2.83.E-04 6.99.E-06 4.36.E-07 -2.85.E-06 7.29.E-09 3.13.E-08 J -1.31.E-04 7.03.E-05 -4.09.E-05 -5.89.E-07 -1.03.E-07 1.85.E-07 -2.47.E-10 -1.31.E-09

[0258] Reference Figure 22 to describe the imaging lens system according to the ninth exemplary embodiment.

[0259] The imaging lens system 900 includes a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, and an eighth lens 980.

[0260] The first lens 910 has a positive refractive power and has a convex object side and a concave image side. The second lens 920 has a negative refractive power and has a convex object side and a concave image side. The third lens 930 has a positive refractive power and has a concave object side and a convex image side. The fourth lens 940 has a negative refractive power and has a concave object side and a convex image side. The fifth lens 950 has a positive refractive power and has a convex object side and a concave image side. The sixth lens 960 has a negative refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 960. The seventh lens 970 has a positive refractive power and has a convex object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the seventh lens 970. The eighth lens 980 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the eighth lens 980.

[0261] The imaging lens system 900 may further include a diaphragm ST (not shown), a filter IF, and an imaging plane IP. For example, the diaphragm ST may be disposed between the second lens 920 and the third lens 930, or between the third lens 930 and the fourth lens 940. The filter IF may be disposed between the eighth lens 980 and the imaging plane IP. As a reference, if necessary, the diaphragm ST and the filter IF may be omitted. The imaging plane IP may be formed at a position where light incident from the first lens 910 to the eighth lens 980 is imaged. For example, the imaging plane IP may be formed on one surface of an image sensor IS of a camera module, or within the image sensor IS.

[0262] The imaging lens system 900 configured as described above may exhibit Figure 23 aberration characteristics in the form shown. Tables 17 and 18 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0263] Table 17

[0264]

[0265]

[0266] Table 18

[0267] Surface number S1 S2 S3 S4 S5 S6 S7 S8 K -9.56.E-01 4.06.E+01 1.37.E+01 2.50.E+00 4.76.E+01 9.50.E+01 6.57.E+01 5.28.E+01 A 3.28.E-03 -1.11.E-02 -1.74.E-02 -9.28.E-03 -9.55.E-03 -8.65.E-03 -5.39.E-03 9.18.E-03 B 2.94.E-03 5.61.E-03 7.05.E-03 6.03.E-03 -1.10.E-03 -8.73.E-03 -1.49.E-02 -2.95.E-02 C -6.81.E-03 3.21.E-03 7.56.E-03 -1.26.E-02 3.62.E-03 1.29.E-02 2.63.E-02 3.08.E-02 D 1.06.E-02 -1.27.E-02 -2.60.E-02 4.08.E-02 -1.99.E-02 -2.16.E-02 -6.42.E-02 -3.39.E-02 E -1.09.E-02 1.80.E-02 4.11.E-02 -8.68.E-02 5.62.E-02 3.33.E-02 1.27.E-01 3.62.E-02 F 7.74.E-03 -1.63.E-02 -4.27.E-02 1.21.E-01 -9.44.E-02 -4.11.E-02 -1.74.E-01 -3.04.E-02 G -3.90.E-03 1.03.E-02 3.11.E-02 -1.15.E-01 1.04.E-01 3.77.E-02 1.66.E-01 1.86.E-02 H 1.41.E-03 -4.64.E-03 -1.62.E-02 7.72.E-02 -7.81.E-02 -2.51.E-02 -1.11.E-01 -8.15.E-03 J -3.68.E-04 1.50.E-03 6.07.E-03 -3.65.E-02 4.12.E-02 1.20.E-02 5.32.E-02 2.57.E-03 Surface number S9 S10 S11 S12 S13 S14 S15 S16 K 9.60.E+01 7.01.E+01 1.81.E+01 -6.58.E+01 -7.13.E+00 1.65.E+01 5.11.E+01 -8.14.E+00 A 2.94.E-02 1.65.E-02 -4.96.E-02 -9.68.E-02 -2.96.E-03 4.18.E-02 -3.98.E-02 -3.21.E-02 B -3.52.E-02 -7.11.E-03 5.68.E-02 6.26.E-02 -4.31.E-03 -2.09.E-02 8.72.E-03 8.48.E-03 C 8.44.E-03 -1.52.E-02 -4.64.E-02 -3.52.E-02 2.50.E-03 6.29.E-03 -1.56.E-03 -1.93.E-03 D 5.54.E-03 1.81.E-02 2.94.E-02 1.76.E-02 -1.38.E-03 -1.61.E-03 3.46.E-04 3.58.E-04 E -5.81.E-03 -1.15.E-02 -1.48.E-02 -7.24.E-03 4.82.E-04 3.46.E-04 -6.55.E-05 -5.04.E-05 F 2.83.E-03 5.25.E-03 5.83.E-03 2.32.E-03 -1.10.E-04 -5.88.E-05 8.57.E-06 5.22.E-06 G -9.74.E-04 -1.85.E-03 -1.75.E-03 -5.55.E-04 1.72.E-05 7.65.E-06 -7.65.E-07 -3.95.E-07 H 2.65.E-04 5.11.E-04 3.94.E-04 9.70.E-05 -1.87.E-06 -7.49.E-07 4.75.E-08 2.18.E-08 J -5.83.E-05 -1.08.E-04 -6.55.E-05 -1.22.E-05 1.44.E-07 5.47.E-08 -2.09.E-09 -8.69.E-10

[0268] Reference Figure 24 is made to describe an imaging lens system according to a tenth exemplary embodiment.

[0269] The imaging lens system 1001 includes a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, and a sixth lens 1060.

[0270] The first lens 1010 has a positive refractive power and has a convex object side and a concave image side. The second lens 1020 has a negative refractive power and has a convex object side and a concave image side. The third lens 1030 has a positive refractive power and has a convex object side and a concave image side. The fourth lens 1040 has a negative refractive power and has a convex object side and a concave image side. Inflection points are formed on the object side and the image side of the fourth lens 1040. The fifth lens 1050 has a positive refractive power and has a convex object side and a convex image side. In addition, inflection points are formed on the object side and the image side of the fifth lens 1050. The sixth lens 1060 has a negative refractive power and has a concave object side and a concave image side. In addition, inflection points are formed on the object side and the image side of the sixth lens 1060.

[0271] The imaging lens system 1001 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 1020 and the third lens 1030, or between the third lens 1030 and the fourth lens 1040. The filter IF may be disposed between the sixth lens 1060 and the imaging plane IP. As a reference, the stop ST and the filter IF may be omitted if necessary. The imaging plane IP may be formed at a position where the light incident from the first lens 1010 to the sixth lens 1060 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module, or formed within the image sensor IS.

[0272] The imaging lens system 1001 configured as described above may exhibit Figure 25 aberration characteristics in the form shown. Tables 19 and 20 show the lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.

[0273] Table 19

[0274]

[0275]

[0276] Table 20

[0277] Surface number S1 S2 S3 S4 S5 S6 K -1.03.E+00 -1.20.E+01 2.23.E+01 4.16.E+00 9.13.E+01 -7.93.E+01 A 1.23.E-03 -4.57.E-03 -1.11.E-02 -9.54.E-03 -1.07.E-02 -1.01.E-02 B 8.44.E-04 3.06.E-03 5.77.E-03 7.25.E-03 4.38.E-03 1.01.E-03 C -4.68.E-04 -2.01.E-03 -3.75.E-03 -5.65.E-03 -4.01.E-03 5.54.E-05 D 1.86.E-04 8.97.E-04 2.03.E-03 3.41.E-03 2.33.E-03 -2.52.E-04 E -4.99.E-05 -2.56.E-04 -7.20.E-04 -1.31.E-03 -8.96.E-04 1.09.E-04 F 8.90.E-06 4.64.E-05 1.61.E-04 3.15.E-04 2.19.E-04 -2.51.E-05 G -1.01.E-06 -5.15.E-06 -2.18.E-05 -4.56.E-05 -3.25.E-05 3.44.E-06 H 6.56.E-08 3.22.E-07 1.64.E-06 3.64.E-06 2.64.E-06 -2.67.E-07 J -1.86.E-09 -8.67.E-09 -5.31.E-08 -1.23.E-07 -8.89.E-08 9.14.E-09 Surface number S7 S8 S9 S10 S11 S12 K -2.89.E+01 -1.64.E+01 -1.17.E+01 -2.16.E+00 -8.60.E+00 -3.21.E-01 A -4.54.E-03 -7.65.E-03 -9.69.E-04 4.45.E-03 -6.38.E-03 -9.67.E-03 B -8.21.E-04 2.23.E-04 -2.77.E-04 -5.04.E-04 1.79.E-04 7.39.E-04 C 5.18.E-04 2.04.E-04 6.49.E-05 3.26.E-05 5.62.E-06 -5.05.E-05 D -1.36.E-04 -6.25.E-05 -6.87.E-06 7.48.E-07 6.40.E-07 2.55.E-06 E 1.96.E-05 8.64.E-06 3.72.E-07 -1.04.E-07 -9.45.E-08 -9.06.E-08 F -1.65.E-06 -6.51.E-07 -5.95.E-09 -5.39.E-09 4.30.E-09 2.17.E-09 G 7.97.E-08 2.70.E-08 -4.55.E-10 7.10.E-10 -9.76.E-11 -3.31.E-11 H -1.99.E-09 -5.59.E-10 2.47.E-11 -2.32.E-11 1.13.E-12 2.91.E-13 J 1.93.E-11 4.25.E-12 -3.52.E-13 2.55.E-13 -5.38.E-15 -1.14.E-15

[0278] The exemplary imaging lens system described herein may include the following features. For example, the focal length of the imaging lens system is 7 mm to 12 mm, the TTL of the imaging lens system is 8.0 mm to 13.0 mm, the focal length of the first lens is 5.0 mm to 9.0 mm, the focal length of the second lens is -22 mm to 10 mm, the focal length of the third lens is 28 mm to 600 mm, the focal length of the fourth lens is -300 mm to 2000 mm. The focal length of the fifth lens is 80 mm to 1000 mm, the focal length of the sixth lens is -14.0 mm to -5.0 mm, the focal length of the seventh lens is 3.0 mm to 6.0 mm, and the focal length of the eighth lens is -8.0 mm to -3.0 mm.

[0279] Tables 21 to 26 are the optical characteristic values and conditional expression values of the imaging lens system according to the first exemplary embodiment to the eighth exemplary embodiment.

[0280] Table 21

[0281]

[0282] Table 22

[0283]

[0284]

[0285] Table 23

[0286]

[0287]

[0288] Table 24

[0289]

[0290]

[0291] Table 25

[0292]

[0293] Table 26

[0294]

[0295] As described above, the imaging lens system can be mounted in a thin and portable electronic device.

[0296] Although specific example embodiments have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail can be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are considered to be illustrative only and not for the purpose of limitation. The description of a feature or aspect in each example is considered applicable to similar features or aspects in other examples. Suitable results can also be obtained if the described techniques are performed in a different order, and / or if the components in the described system, architecture, device, or circuit are combined in a different manner, and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not defined by the specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents will be construed as being included in the present disclosure.

Claims

1. An imaging lens system, comprising: A first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power, and an eighth lens with negative refractive power, which are sequentially arranged from the object side. At least one of the first lens to the eighth lens has at least one aspherical surface. Wherein, the first lens has a convex object side and a concave image side, the second lens has a convex object side and a concave image side, the sixth lens has a convex object side and a concave image side, the seventh lens has a convex object side and a concave image side, and the eighth lens has a concave image side. Wherein, the imaging lens system includes a total of eight lenses with refractive power, and Where 0.15 < BFL / TTL < 0.4 and 1.9 mm < BFL < 2.8 mm, where BFL is the distance from the image side of the eighth lens to the imaging surface, and TTL is the distance from the object side of the first lens to the imaging surface.

2. The imaging lens system according to claim 1, wherein Satisfy 5.0mm ≤ ImgHT ≤ 9.0mm, where, ImgHT is the height of the imaging surface.

3. The imaging lens system according to claim 2, wherein Satisfy 0.1 < T1 / ImgHT < 0.2, where, T1 is the thickness of the first lens at the center of the optical axis.

4. The imaging lens system according to claim 1, wherein Satisfy 0 < f1 / f < 2.0, where, f1 is the focal length of the first lens, and f is the focal length of the imaging lens system.

5. The imaging lens system according to claim 1, wherein Satisfy -3.5 < f2 / f < 0, where, f2 is the focal length of the second lens, and f is the focal length of the imaging lens system.

6. The imaging lens system according to claim 1, wherein Satisfy 0.8 < TTL / f < 1.2, where, f is the focal length of the imaging lens system.

7. The imaging lens system according to claim 2, wherein Satisfy 0.4 < (TTL - BFL) / 2ImgHT < 0.62, where, 2ImgHT is the diagonal length of the imaging surface.

8. The imaging lens system according to claim 1, wherein Satisfy 0 < f7 / f < 0.8, where, f7 is the focal length of the seventh lens, and f is the focal length of the imaging lens system.

9. The imaging lens system according to claim 1, wherein Satisfy 1.3 < SUMT / BFL < 2.8, where, SUMT is the sum of the thicknesses of the first lens to the eighth lens at the center of the optical axis.

10. A camera module, comprising: The imaging lens system according to claim 1; And An image sensor, including an imaging surface disposed at the imaging surface of the imaging lens system, Wherein, the image sensor converts the image of an object formed by the lens of the imaging lens system on the effective imaging area of the imaging surface into an electrical signal.

11. A portable terminal, comprising: A housing; And The camera module according to claim 10, disposed in the housing.

12. A camera module, comprising: A first lens barrel for accommodating a second lens barrel; An imaging lens system disposed in the second lens barrel; And An image sensor disposed in the first lens barrel and including an imaging surface disposed at the imaging surface of the imaging lens system, Wherein, the second lens barrel can move to at least partially protrude from the first lens barrel. Among them, the imaging lens system includes a total of eight lenses with refractive power, and at least one of the eight lenses has at least one aspherical surface. Among them, 0.15 < BFL / TTL < 0.4 and 1.9 mm < BFL ≤ 4.1547 are satisfied, where BFL is the distance from the image side of the last lens closest to the image sensor to the imaging surface, and TTL is the distance from the object side of the frontmost lens farthest from the image sensor to the imaging surface. Among them, the eight lenses with refractive power include: A first lens having a positive refractive power, a convex object side, and a concave image side. A second lens having a negative refractive power, a convex object side, and a concave image side. A third lens having a positive refractive power. A fourth lens having a refractive power. A fifth lens having a positive refractive power. A sixth lens having a negative refractive power, a convex object side, and a concave image side. A seventh lens having a positive refractive power, a convex object side, and a concave image side. And An eighth lens having a negative refractive power and a concave image side. And Among them, the first lens to the eighth lens are arranged in sequence from the object side.

Images