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 including: a first lens having a positive refractive power, a convex object side surface, and a concave image side surface; a second lens having a negative refractive power, a convex object-side surface, and a concave image-side surface; a third lens having positive refractive power, a convex object-side surface, and a concave image-side surface; a fourth lens having negative refractive power, a convex object-side surface, and a concave image-side surface; a fifth lens having positive refractive power, a convex object-side surface, and a convex image-side surface; and a sixth lens having a negative refractive power, a concave object-side surface, and a concave image-side surface, in which at least one of the first to sixth lenses has at least one aspheric surface, in which the imaging lens system includes a total of six lenses having refractive power, where 0.15 lt is satisfied; bFL / TTLlt; 0.40 and 2.0 lt, 0.40 and 2.0 lt; dL1LP / BFLlt; 5.4).

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 with 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 smartphone.

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

[0007] The present Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. The present Summary 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, wherein 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 can include an imaging lens system and an image sensor, the image sensor includes an imaging surface disposed at the imaging surface of the imaging lens system, wherein the image sensor can 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 can include a housing, and the camera module can 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 can have a negative refractive power.

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

[0022] The fourth lens can 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 the lens of the imaging lens system on an effective imaging area 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 includes 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 lens barrel that houses 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 an imaging plane of the imaging lens system, wherein the second lens barrel is movable to at least partially protrude from the first lens barrel, wherein the imaging lens system includes seven or more lenses, and wherein 0.15 < BFL / TTL and 1.9 mm < BFL are satisfied. Here, 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 frontmost lens farthest from the image sensor to the imaging plane.

[0030] The seven or more lenses may include at least a first lens with positive refractive power, a second lens with refractive power, a third lens with positive refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with negative refractive power, wherein the first lens to the sixth lens may be arranged in sequence 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 example embodiments.

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

[0034] Figure 4 and Figure 5 They are Figure 2 and Figure 3 A magnified view of the imaging lens system is shown.

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

[0036] Figure 7 yes Figure 6 Aberration curves of the imaging lens system shown.

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

[0038] Figure 9 yes Figure 8 Aberration curves of the imaging lens system shown.

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

[0040] Figure 11 yes Figure 10 Aberration curves of the imaging lens system shown.

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

[0042] Figure 13 yes Figure 12 Aberration curves of the imaging lens system shown.

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

[0044] Figure 15 yes Figure 14 Aberration curves of the imaging lens system shown.

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

[0046] Figure 17 yes Figure 16 Aberration curves of the imaging lens system shown.

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

[0048] Figure 19 yes Figure 18 Aberration curves of the imaging lens system shown.

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

[0050] Figure 21 yes Figure 20 Aberration curves of the imaging lens system shown.

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

[0052] Figure 23 yes Figure 22 Aberration curves of the imaging lens system shown.

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

[0054] Figure 25 yes Figure 24 Aberration curves of the imaging lens system shown.

[0055] Throughout the drawings and detailed description, the same reference numerals denote the same elements. The drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

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

[0057] The following detailed description is provided to assist the reader in fully understanding the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent upon understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but may be readily apparent upon understanding the present disclosure, except for operations that must occur in a certain order. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

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

[0059] It should be noted herein that use of the term “may” with respect to an example or embodiment, for example with respect to what an example or embodiment may include or implement, means that there is at least one example or embodiment that includes or implements such feature, and all examples and embodiments are not limited thereto.

[0060] Throughout the specification, when an element such as a layer, a region, or a 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 one or more other elements may be present between them. 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 present.

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

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

[0063] For ease of description, spatially relative terms such as "above," "upper," "below," "lower," etc. may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. In addition to the orientation shown in the accompanying drawings, such spatially relative terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is turned over, an element described as being "above" or "above" another element will be "lower" or "below" another element relative to the other element. Therefore, the term "above" includes both above and below 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 spatially relative terms used herein will be interpreted accordingly.

[0064] The terms used herein are only used to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the articles "a", "an" and "the" are intended to include plural forms as well. The terms "include", "comprising" and "having" indicate 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 drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shape that occur during manufacturing.

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

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

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

[0069] Lens thickness, inter-lens distance, and TTL are distances along the lens' optical axis. Furthermore, when describing lens shapes, a convex shape on a surface means that the paraxial region of the corresponding surface is convex, while a concave shape on a surface means that the paraxial region of the corresponding surface is concave. Therefore, even if a lens surface is described as having a convex shape, the edge of the lens may also be concave. Similarly, even if a lens surface is described as having a concave shape, the edge of the lens may also be convex.

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

[0071] The optical imaging system may further include at least one aperture stop disposed before the first lens, or disposed between any two adjacent lenses from the first lens to the sixth lens, the seventh lens, or the eighth lens, or disposed between the sixth lens, the seventh lens, or the eighth lens and the imaging plane. The optical imaging system may include two or more aperture stops disposed at different positions.

[0072] The optical imaging system may further include an image sensor having an imaging surface disposed at the imaging plane of the imaging lens system. The image sensor converts an image of an object formed on an effective imaging area of the imaging surface by the lens of the imaging lens system 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 plane.

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

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

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

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

[0078] The imaging lens system described herein can be configured to be installed in a portable electronic device. For example, the imaging lens system can be installed in a smartphone, a laptop computer, an augmented reality (AR) device, a virtual reality (VR) device, a portable game console, or the like. However, the scope of use and examples of the imaging lens system described in this disclosure are not limited to the aforementioned electronic devices. For example, the imaging lens system can be applied to electronic devices that require high-resolution imaging despite a limited installation space.

[0079] An imaging lens system according to one or more exemplary 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 sequentially from the object side. However, the lenses comprising 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] According to one aspect, an imaging lens system can be configured such that the distance BFL from the last lens element to the imaging plane is formed to have a significant size. For example, in the imaging lens system of the present disclosure, the distance BFL from the image side surface of the eighth lens element, which is the last lens element, to the imaging plane can be greater than 1.9 mm and less than 2.8 mm.

[0081] Furthermore, the 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 as the frontmost lens to the imaging plane: TTL). For example, BFL / TTL may be greater than 0.15.

[0082] An 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 order from the object side.

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

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

[0085] An 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 order 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 expressions, 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 plane, BFL is the distance from the image side surface of the eighth lens to the imaging plane, 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 plane.

[0107] The imaging lens system may satisfy some of the above-described conditional expressions in a form further defined as follows.

[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] An 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 order from the object side, and may satisfy one or more of the following conditional expressions.

[0119] 5.0mm≤ImgHT≤9.0mm

[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 plane), 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 plane), EPD is the diameter of the entrance pupil, SUMT is the sum of the thicknesses of the first to 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 the lenses is the distance from the image-side surface of the lens disposed on the front side (object side) to the object-side surface of the lens disposed on the rear side (image side).

[0129] The imaging lens system may satisfy some of the above-described conditional expressions in a form further defined 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 to eighth lenses having the following characteristics. As another example, the imaging lens system according to the second aspect can include two or more of the first to eighth lenses having the following characteristics. However, the imaging lens system according to the above aspects does not necessarily include lenses having the following characteristics.

[0136] Hereinafter, characteristics of the first to eighth lenses 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 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 can be aspherical. The second lens can be formed of a material having high light transmittance and excellent workability. For example, the second lens can be formed of a plastic material or a glass material. The second lens can be configured to have a predetermined refractive index. For example, the refractive index of the second lens can be greater than 1.6. As an example, the refractive index of the second lens can be greater than 1.63 and less than 1.69. The second lens can have a predetermined Abbe number. For example, the Abbe number of the second lens can be less than 30. As an example, the Abbe number of the second lens can 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 from a material having high light transmittance and excellent workability. For example, the third lens may be formed from a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be 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 refractive power. One side of the fourth lens may be concave. For example, the fourth lens may have a concave image-side surface. 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 from a material having high light transmittance and excellent workability. For example, the fourth lens may be formed from a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.6. As 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 from a material having high light transmittance and excellent workability. For example, the fifth lens may be formed from a plastic material or a glass material. The fifth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fifth lens may be 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 refractive power. For example, the sixth lens may have 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 or both surfaces of the sixth lens may have an inflection point. For example, the inflection point may be formed on both the object-side and image-side surfaces of the sixth lens. Furthermore, one or both surfaces of the sixth lens may have both concave and convex shapes. For example, the optical axis portion of the sixth lens may be convex on the object-side surface, and the peripheral portion of the optical axis of the sixth lens may be concave on the object-side surface. As another example, the optical axis portion of the sixth lens may be concave on the image-side surface, and the peripheral portion of the optical axis of the sixth lens may be convex on the image-side surface. The sixth lens may be formed from a material having high light transmittance and excellent workability. For example, the sixth lens may be formed from a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be 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 refractive power. The seventh lens includes a spherical surface or an aspherical surface. For example, both surfaces of the seventh lens may be aspherical. An inflection point may be formed on one or both surfaces of the seventh lens. For example, an inflection point may be formed on both the object-side and image-side surfaces of the seventh lens. Furthermore, a concave shape and a convex shape may be formed on one or both surfaces of the seventh lens. For example, the optical axis portion of the seventh lens may be convex on the object-side surface, and the peripheral portion of the optical axis of the seventh lens may be concave on the object-side surface. As another example, the optical axis portion of the seventh lens may be concave on the image-side surface, and the peripheral portion of the optical axis of the seventh lens may be convex on the image-side surface. The seventh lens may be formed from a material having high light transmittance and excellent workability. For example, the seventh lens may be formed from a plastic material or a glass material. The seventh lens may be configured to have a predetermined refractive index. For example, the refractive index of the seventh lens may be less than 1.6. As an example, the refractive index of the seventh lens may be greater than 1.52 and less than 1.57. The seventh lens may have a predetermined Abbe number. For example, the Abbe number of the seventh lens may be less than 60. As an example, the Abbe number of the seventh lens may be greater than 53 and less than 58.

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

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

[0146] Equation 1

[0147]

[0148] In Equation 1, c is the inverse of the radius of curvature of the corresponding lens, k is the conic constant, r is the distance from a certain 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 certain 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-described example embodiments or the above-described forms may further include an aperture and a filter. As an example, the imaging lens system may further include an aperture 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 aperture 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. For reference, the filter described herein is configured to block infrared light, but the wavelength of light blocked by the filter is not limited to infrared light.

[0150] A 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, a camera module may include an imaging lens system according to one aspect. As another example, a camera module may include an imaging lens system according to one aspect and an imaging lens system according to another aspect.

[0151] According to one embodiment, a camera module can be configured to be resizable. 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 can vary depending on the operating state of the camera module. For example, the distance CL can be greater when the camera module is in an operating state than when the camera module is in a non-operating state.

[0152] According to another aspect, a camera module may include an imaging lens system that enables the size of the camera module to be changed. For example, the camera module may include an imaging lens system comprising first through eighth lenses arranged sequentially from the object side. Furthermore, the camera module may include an image sensor configured to convert an optical signal incident on the imaging lens system into an electrical signal.

[0153] The camera module can be configured to move the imaging lens system toward the image sensor. For example, the camera module can move the imaging lens system toward the image sensor to adjust focus or focus magnification, and also move the imaging lens system toward the image sensor to reduce the size of the camera module. The displacement of the imaging lens system in the latter case can be greater than the displacement of the imaging lens system in the former case. For clarification, the displacement of the imaging lens system in the latter case can be expressed by the following conditional expression.

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

[0155] In the above conditional expressions, BFLx can be the distance from the image side surface 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 when the imaging lens system is positioned farthest from the image sensor, and BFLm is the distance from the image side surface of the last lens to the image sensor when the imaging lens system is positioned closest to the image sensor.

[0156] For reference, in the above description, 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 example embodiments may include six or seven lenses.

[0157] Another embodiment of a camera module can satisfy the aforementioned conditional expression 0.6 < (BFLx - BFLm) / BFLx < 0.8, facilitating installation in a reduced-thickness form, and further satisfying other conditions for achieving high resolution. For example, the camera module can include an image sensor having a significantly larger size to facilitate achieving high resolution. Specifically, the image height (the height of the imaging surface) that can be substantially formed in the image sensor can be 5.0 mm to 9.0 mm.

[0158] In the following, reference Figures 1 to 5 Describes an example of a camera module.

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

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

[0161] The camera module 20 according to an example 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 modules 10. In detail, the camera module 20 according to an example 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 lens barrel 24, a second lens 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 lens 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 varied from Figure 2 The state shown is reduced to Figure 3 On the contrary, the length of the camera module 20 in the optical axis direction can be Figure 3 The state shown extends to Figure 2 The variable length of the camera module 20 in the optical axis direction may be approximately proportional to the distance from the rear lens to the image sensor IS. Specifically, the difference (BFLx-BFLm) between the distance BFLx from the rear lens to the image sensor IS in the operating state (or image capturing state) of the camera module 20 and the distance BFLm from the rear lens to the image sensor IS in the non-operating state of the camera module 20 may have the following numerical relationship with respect to the back focal length of the imaging lens system 22 or with respect to the distance BFLx from the rear lens to the image sensor IS in the operating state (or image capturing state) of the camera module 20:

[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 including 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] like 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. Furthermore, the imaging lens system 22 may further include an optical filter IF.

[0167] The first through eighth lenses L1 through L8 can be arranged sequentially along the optical axis. For example, the second lens L2 can be positioned on the image side of the first lens L1, and the third lens L3 can be positioned on the image side of the second lens L2. Therefore, in the imaging lens system 22 according to this example embodiment, no optical elements other than the optical filter IF or the image sensor IS are positioned on the image side of the eighth lens L8, which serves as the final lens. The first through eighth lenses L1 through L8 are configured to image incident light at a specific position. For example, light refracted by the first through eighth lenses L1 through L8 can be formed onto an imaging plane IP formed in the image sensor IS.

[0168] The imaging lens system 22 can be configured to have sufficient space to move in the optical axis direction. Specifically, the imaging lens system 22 can be configured to have a considerable 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 can be greater than 1.9 mm and less than 2.8 mm. The BFL of the imaging lens system 22 can be increased or decreased in proportion 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) can be greater than 0.15.

[0169] The backlight lens element (BFL) of the imaging lens system 22 can be used to provide space for avoiding the first through eighth lenses L1, L8 in the direction of the imaging plane IP. For example, the first through eighth lenses L1, L8 can be shifted in the direction toward the imaging plane IP by an amount corresponding to the BFL. For reference, the BFL of the imaging lens system 22 can have substantially the same dimensions as the BFLx of the camera module 20. However, the BFL and BFLx do not necessarily have to be the same size. For example, when the imaging plane IP is formed within the image sensor IS, the BFL can be larger than the BFLx.

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

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

[0172] The first lens barrel 24 may be configured to receive the second lens barrel 26 and the image sensor IS. In addition, the first lens barrel 24 may also accommodate a driving 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 driving unit.

[0173] The second lens barrel 26 can be disposed within the first lens barrel 24 and can be configured to house 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 be moved toward an object or toward the image sensor IS while housing the imaging lens system 22. Depending on the direction of movement, the second lens barrel 26 can partially extend from the first lens barrel 24 or completely retract 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 extend 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 retract into the interior of the first lens barrel 24.

[0174] The drive unit (not shown) may be configured to move the second lens barrel 26 in the optical axis direction. For example, the drive unit may 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 at high resolution. For example, the camera module 20 can utilize a large image sensor IS by providing sufficient distance and space between the imaging lens system 22 and the image sensor IS. Furthermore, the camera module 20 can be configured to facilitate thinning. For example, the size of the camera module 20 can be reduced by varying the length CL in the optical axis direction as described above. Therefore, the camera module 20 according to this exemplary embodiment can be easily installed in small and thin electronic devices.

[0176] Hereinafter, specific example embodiments of an imaging lens system capable of making a camera module thinner will be described with reference to the accompanying drawings.

[0177] First, refer to Figure 6 An imaging lens system according to a first exemplary embodiment is described.

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

[0180] The imaging lens system 100 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 180 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 110 to the eighth lens 180 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0181] The imaging lens system 100 configured as described above can exhibit Figure 7 Aberration characteristics of the shown forms. Tables 1 and 2 show lens characteristics and aspherical values of the imaging lens system according to this 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] refer to Figure 8 An imaging lens system according to a second exemplary embodiment is described.

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

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

[0191] The imaging lens system 200 configured as described above can exhibit Figure 9 Tables 3 and 4 show lens characteristics and aspherical values of the imaging lens system according to this 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] refer to Figure 10An imaging lens system according to a third exemplary embodiment is described.

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

[0200] The imaging lens system 300 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 380 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 310 to the eighth lens 380 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0201] The imaging lens system 300 configured as described above can exhibit Figure 11 Tables 5 and 6 show lens characteristics and aspherical values of the imaging lens system according to this 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] refer to Figure 12 An imaging lens system according to a fourth exemplary embodiment is described.

[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 positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 420 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 430 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 440 has negative refractive power and has a concave object-side surface and a concave image-side surface.

[0210] The fifth lens 450 has positive refractive power and has a concave object-side surface and a convex image-side surface.

[0211] The sixth lens element 460 has negative refractive power and has a convex object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the sixth lens element 460. The seventh lens element 470 has positive refractive power and has a convex object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the seventh lens element 470. The eighth lens element 480 has negative refractive power and has a concave object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the eighth lens element 480.

[0212] The imaging lens system 400 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 480 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 410 to the eighth lens 480 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0213] The imaging lens system 400 configured as described above can exhibit Figure 13 Tables 7 and 8 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0214] Table 7

[0215]

[0216]

[0217] Table 8

[0218]

[0219]

[0220] refer to Figure 14 An imaging lens system according to a fifth exemplary embodiment is described.

[0221] 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 .

[0222] The first lens 510 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 520 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 530 has positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 540 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fifth lens 550 has positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 560 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the sixth lens 560. The seventh lens 570 has positive refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the seventh lens 570. The eighth lens 580 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 580 .

[0223] The imaging lens system 500 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 580 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 510 to the eighth lens 580 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0224] The imaging lens system 500 configured as described above can exhibit Figure 15 Tables 9 and 10 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0225] Table 9

[0226] 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 The 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 Filters 0.210 1.518 64.2 S18 0.375 S19 Imaging surface 0.015

[0227] Table 10

[0228]

[0229]

[0230] refer to Figure 16 An imaging lens system according to a sixth exemplary embodiment is described.

[0231] 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 .

[0232] The first lens 610 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 620 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 630 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 640 has positive refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 650 has positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 660 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the sixth lens 660. The seventh lens 670 has positive refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the seventh lens 670. The eighth lens 680 has negative refractive power and has a concave object-side and image-side surfaces. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 680 .

[0233] The imaging lens system 600 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 680 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 610 to the eighth lens 680 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0234] The imaging lens system 600 configured as described above can exhibit Figure 17Tables 11 and 12 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0235] Table 11

[0236] 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 The 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 Filters 0.210 1.518 64.2 S18 0.379 S19 Imaging surface 0.011

[0237] Table 12

[0238]

[0239]

[0240] refer to Figure 18 An imaging lens system according to a seventh exemplary embodiment is described.

[0241] 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 .

[0242] The first lens 710 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 720 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 730 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 740 has negative refractive power and has a concave object-side surface and a convex image-side surface.

[0243] The fifth lens 750 has positive refractive power and has a concave object-side surface and a convex image-side surface.

[0244] The sixth lens element 760 has negative refractive power and has a convex object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the sixth lens element 760. The seventh lens element 770 has positive refractive power and has a convex object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the seventh lens element 770. The eighth lens element 780 has negative refractive power and has a concave object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side and image-side surfaces of the eighth lens element 780.

[0245] The imaging lens system 700 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 780 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 710 to the eighth lens 780 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0246] The imaging lens system 700 configured as described above can exhibit Figure 19 Table 13 and Table 14 show the lens characteristics and aspheric surface values of the imaging lens system according to this exemplary embodiment.

[0247] Table 13

[0248]

[0249]

[0250] Table 14

[0251] 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

[0252] refer to Figure 20 An imaging lens system according to an eighth exemplary embodiment is described.

[0253] 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 .

[0254] The first lens 810 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 820 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 830 has positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 840 has negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 850 has positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 860 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the sixth lens 860. The seventh lens 870 has positive refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the seventh lens 870. The eighth lens 880 has negative refractive power and has a concave object-side and image-side surfaces. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 880 .

[0255] The imaging lens system 800 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 880 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 810 to the eighth lens 880 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0256] The imaging lens system 800 configured as described above can exhibit Figure 21 Tables 15 and 16 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0257] Table 15

[0258]

[0259]

[0260] Table 16

[0261] 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

[0262] refer to Figure 22 An imaging lens system according to a ninth exemplary embodiment is described.

[0263] 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 .

[0264] The first lens 910 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 920 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 930 has positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 940 has negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 950 has positive refractive power and has a convex object-side surface and a concave image-side surface. The sixth lens 960 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the sixth lens 960. The seventh lens 970 has positive refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the seventh lens 970. The eighth lens 980 has negative refractive power and has a concave object-side and image-side surfaces. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 980 .

[0265] The imaging lens system 900 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the eighth lens 980 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location 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 a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0266] The imaging lens system 900 configured as described above can exhibit Figure 23 Tables 17 and 18 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0267] Table 17

[0268]

[0269]

[0270] Table 18

[0271] 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

[0272] refer to Figure 24An imaging lens system according to a tenth exemplary embodiment is described.

[0273] 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 .

[0274] The first lens 1010 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 1020 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 1030 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 1040 has negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side and image-side surfaces of the fourth lens 1040. The fifth lens 1050 has positive refractive power and has a convex object-side surface and a convex image-side surface. In addition, inflection points are formed on the object-side and image-side surfaces of the fifth lens 1050. The sixth lens 1060 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side and image-side surfaces of the sixth lens 1060.

[0275] The imaging lens system 1001 may further include an aperture ST (not shown), an optical filter IF, and an imaging plane IP. For example, the aperture 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 optical filter IF may be disposed between the sixth lens 1060 and the imaging plane IP. For reference, the aperture ST and the optical filter IF may be omitted if desired. The imaging plane IP may be formed at a location where light incident from the first lens 1010 to the sixth lens 1060 is imaged. For example, the imaging plane IP may be formed on a surface of the image sensor IS of the camera module, or within the image sensor IS.

[0276] The imaging lens system 1001 configured as described above can exhibit Figure 25 Tables 19 and 20 show lens characteristics and aspherical values of the imaging lens system according to this exemplary embodiment.

[0277] Table 19

[0278]

[0279]

[0280] Table 20

[0281] 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

[0282] The example imaging lens systems 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.

[0283] Tables 21 to 26 are optical characteristic values and conditional expression values of the imaging lens systems according to the first to eighth exemplary embodiments.

[0284] Table 21

[0285]

[0286] Table 22

[0287]

[0288]

[0289] Table 23

[0290]

[0291]

[0292] Table 24

[0293]

[0294]

[0295] Table 25

[0296]

[0297] Table 26

[0298]

[0299] As described above, the imaging lens system can be installed in a thin portable electronic device. 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 details can be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely descriptive and not for purposes of limitation. The description of features or aspects in each example is to be 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 systems, architectures, devices or circuits are combined in a different manner, and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not to be limited by the specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as included in the present disclosure.

Claims

1. An imaging lens system, comprising: 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 convex object side, and a concave image side; A fourth lens having a negative refractive power, a convex object side, and a concave image side; A fifth lens having a positive refractive power, a convex object side, and a convex image side; And A sixth lens having a negative refractive power, a concave object side, and a concave image side, wherein at least one of the first lens to the sixth lens has at least one aspherical surface, wherein the imaging lens system includes a total of six lenses having refractive power, wherein 0.15 < BFL / TTL < 0.40, wherein TTL is the distance from the object side of the first lens to the imaging surface, and wherein 2.0 < DL1LP / BFL < 5.4, wherein DL1LP is the distance from the object side of the first lens to the image side of the last lens, the last lens being the lens closest to the imaging surface, and BFL is the distance from the image side of the last lens to the imaging surface.

2. The imaging lens system according to claim 1, wherein: The fourth lens has a negative refractive power.

3. The imaging lens system according to claim 1, wherein, 1.0 < TTL / f < 1.3 is satisfied, wherein TTL is the distance from the object side of the first lens to the imaging surface, and f is the focal length of the imaging lens system.

4. 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 an image of an object formed on the effective imaging area of the imaging surface by the lens of the imaging lens system into an electrical signal, and wherein the imaging lens system is movable toward the image sensor and satisfies 0.6 < (BFLx - BFLm) / BFLx < 0.8, wherein 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.

5. A portable terminal, comprising: A housing; And The camera module according to claim 4 disposed in the housing.

6. A camera module, comprising: An imaging lens system including a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power, arranged in sequence from the object side; And An image sensor, wherein at least one of the first lens to the sixth lens has at least one aspherical surface, wherein the imaging lens system includes a total of six lenses having refractive power, 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 third lens has a convex object side and a concave image side, the fourth lens has a convex object side and a concave image side, the fifth lens has a convex object side and a convex image side, and the sixth lens has a concave object side and a concave image side. Among them, 0.15 < BFL / TTL < 0.4 is satisfied, where BFL is the distance from the image side of the last lens to the imaging surface of the imaging lens system, and TTL is the distance from the object side of the first lens to the imaging surface. Among them, 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 when 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 when the imaging lens system is positioned closest to the image sensor.

7. The camera module according to claim 6, wherein: The imaging lens system further includes one or more additional lenses, and the one or more additional lenses are disposed on the image side of the sixth lens facing the image sensor.

8. A portable terminal, comprising: A housing; The camera module according to claim 6 disposed in the housing; And One or more other camera modules.

Images