Imaging lens system

Abstract

The imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order from an object side, wherein the imaging lens system satisfies conditional expressions: 0.23 mm / degree lt; d1 / HFOVlt; 0.35 mm / degree and 0.15 lt; an IMG HT / TTLlt; d1 is the effective diameter of the object side surface of the first lens, HFOV is the field of view of the imaging surface in the horizontal direction, IMG HT is the height of the imaging surface, and TTL is the distance from the object side surface of the first lens to the imaging surface.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10 - 2021 - 0164503, filed on November 25, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] Embodiments of the present disclosure relate to an imaging lens system. For example, embodiments of the present disclosure relate to an imaging lens system that can be mounted on a rear camera of a vehicle and a camera for an autonomous vehicle. Background Art

[0004] Vehicles may include cameras to reduce damage to people and property caused by traffic accidents. For example, one or more cameras may be mounted on the front and rear bumpers of a vehicle to provide a driver with information about objects located in front of and behind the vehicle. Since it is important for a vehicle camera to recognize objects around the vehicle and provide the recognized information to the driver, the vehicle camera may require high - resolution performance. However, due to limitations in the installation position, it may be difficult for a vehicle camera to achieve high resolution. For example, in order to implement a vehicle camera with a specific f - number, it may be necessary to increase the diameters of the front lens and other lenses, but due to structural and design limitations of vehicle components (e.g., bumpers) on which the camera is mounted, it may be difficult to arbitrarily change the size of the lens.

[0005] The above information is presented only as background information to help understand the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above constitutes prior art with respect to the present disclosure. Summary of the Invention

[0006] The Summary of the Invention section is intended to introduce, in a brief form, selections of inventive concepts that will be further described in the Detailed Description section below. The Summary of the Invention section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0007] In one general aspect, an imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged from the object side, where the imaging lens system satisfies the conditional expressions: 0.23 mm / ° < D1 / HFOV < 0.35 mm / ° and 0.15 < IMG HT / TTL < 0.20, where D1 is the effective diameter of the object side surface of the first lens, HFOV is the horizontal - direction field of view of the imaging surface, IMG HT is the height of the imaging surface, and TTL is the distance from the object side surface of the first lens to the imaging surface.

[0008] The first lens may have a concave image side surface.

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

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

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

[0012] The sixth lens may have a positive refractive power.

[0013] The imaging lens system may satisfy the conditional expression 2.5 < TTL / f < 3.2, where f is the focal length of the imaging lens system.

[0014] The imaging lens system may satisfy the conditional expression 0.6 < |f / f3| < 1.6, where f is the focal length of the imaging lens system, and f3 is the focal length of the third lens.

[0015] The imaging lens system may satisfy the conditional expression 0.3 < D1 / TTL < 0.6.

[0016] The imaging lens system may satisfy the conditional expression f2 / f3 < 0, where f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

[0017] The imaging lens system may satisfy the conditional expression f4 / f5 < 0, where f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.

[0018] In another general aspect, the imaging lens system includes a first lens having a concave image side surface, a second lens having a refractive power, a third lens having a positive refractive power and a convex image side surface, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a refractive power, where the first lens to the sixth lens are arranged in sequence from the object side, and where the imaging lens system satisfies the conditional expression 2.5 < TTL / f < 3.2, where f is the focal length of the imaging lens system, and TTL is the distance from the object side surface of the first lens to the imaging surface.

[0019] The imaging lens system may satisfy the conditional expression -2.4 < f2 / f3 < -0.6, where f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

[0020] The imaging lens system may satisfy the conditional expression -1.6 < f4 / f5 < -0.8, where f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.

[0021] The imaging lens system may satisfy the conditional expression 1.6 < f-number < 2.1.

[0022] The imaging lens system can satisfy the conditional expression 0.4 < IMG HT / f < 0.6, where IMG HT is the height of the imaging surface.

[0023] In another general aspect, the imaging lens system includes a first lens having a concave image side surface, a second lens having a refractive power, a third lens having a positive refractive power and a convex image side surface, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a refractive power, wherein the first lens to the sixth lens are arranged in sequence from the object side, and wherein the imaging lens system satisfies the conditional expression 0.23 mm / ° < D1 / HFOV < 0.35 mm / ° , where D1 is the effective diameter of the object side surface of the first lens, and HFOV is the horizontal field of view of the imaging surface.

[0024] The imaging lens system can satisfy the conditional expression 0.15 < IMG HT / TTL < 0.20, where IMG HT is the height of the imaging surface, and TTL is the distance from the object side surface of the first lens to the imaging surface.

[0025] The imaging lens system can satisfy the conditional expression 2.5 < TTL / f < 3.2, where f is the focal length of the imaging lens system, and TTL is the distance from the object side surface of the first lens to the imaging surface.

[0026] According to the appended claims, the drawings, and the following detailed description, other features and aspects will become apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a diagram showing an imaging lens system according to a first embodiment of the present disclosure.

[0028] Figure 2 shows Figure 1 the aberration curves of the imaging lens system shown.

[0029] Figure 3 is a diagram showing an imaging lens system according to a second embodiment of the present disclosure.

[0030] Figure 4 shows Figure 3 the aberration curves of the imaging lens system shown.

[0031] Figure 5 is a diagram showing an imaging lens system according to a third embodiment of the present disclosure.

[0032] Figure 6 shows Figure 5 the aberration curves of the imaging lens system shown.

[0033] Figure 7is a diagram showing an imaging lens system according to a fourth embodiment of the present disclosure.

[0034] Figure 8 Shows Figure 7 Aberration curves of the imaging lens system shown.

[0035] Fig. 9 is a diagram showing an imaging lens system according to a fifth embodiment of the present disclosure.

[0036] Fig.10 Shows Fig. 9 Aberration curves of the imaging lens system shown.

[0037] Fig.11 is a diagram showing an imaging lens system according to a sixth embodiment of the present disclosure.

[0038] Fig.12 Shows Fig.11 Aberration curves of the imaging lens system shown.

[0039] Fig.13 is a diagram showing an imaging lens system according to a seventh embodiment of the present disclosure.

[0040] Fig.14 Shows Fig.13 Aberration curves of the imaging lens system shown.

[0041] Fig.15 is a diagram illustrating an imaging lens system according to an eighth embodiment of the present disclosure.

[0042] Fig.16 Shows Fig.15 Aberration curves of the imaging lens system shown.

[0043] Fig.17 is a diagram illustrating an imaging lens system according to a ninth embodiment of the present disclosure.

[0044] Fig.18 Shows Fig.17 Aberration curves of the imaging lens system shown.

[0045] Fig.19 is a diagram illustrating an imaging lens system according to a tenth embodiment of the present disclosure.

[0046] Fig. 20 Shows Fig.19 Aberration curves of the imaging lens system shown.

[0047] Throughout the drawings and detailed description, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0048] Hereinafter, although exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings, it should be noted that examples are not limited thereto.

[0049] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example, and except for operations that must occur in a specific order, it is not limited to the order set forth herein, but can be changed, which will be apparent after understanding the present disclosure. In addition, for greater clarity and brevity, descriptions of features known in the art may be omitted.

[0050] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent after understanding the present disclosure.

[0051] 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, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, no other elements may be present between the element and the other element.

[0052] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more items.

[0053] 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 only used to distinguish one member, component, region, layer or portion from another member, component, region, layer or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer or first portion mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second portion.

[0054] Spatially relative terms such as "above", "higher", "below", "lower", etc. may be used herein for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both orientations of "above" and "below". 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 should be interpreted accordingly.

[0055] The terms used herein are only used to describe various examples and are not used 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 words "include", "comprise" and "have" indicate the presence of the features, numbers, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0056] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0057] It should be noted that herein, use of the word “may” with respect to an example, such as regarding what an example may include or implement, means that there is at least one example in which such feature is included or implemented, and all examples are not limited thereto.

[0058] The features of the examples described herein can be combined in various ways that will be apparent after understanding the present disclosure. In addition, although the examples described herein have various configurations, other configurations that will be apparent after understanding the present disclosure are also feasible.

[0059] Embodiments of the present disclosure provide an imaging lens system that can reduce variations in lens size and can achieve high resolution.

[0060] In an embodiment, the first lens refers to the lens closest to the object (or subject), and the sixth lens refers to the lens closest to the imaging surface (or image sensor). In an embodiment, the units of the radius of curvature, thickness, TTL (distance from the object side surface of the first lens to the imaging surface), IMG HT (height of the imaging surface), focal length, and effective diameter are expressed in millimeters (mm).

[0061] The thickness of the lens, the gap between the lenses, and the TTL refer to the distances of the lenses on the optical axis. In addition, in the description of the lens shape, a configuration in which one surface is convex means that the paraxial region of that surface is convex, and a configuration in which one surface is concave means that the paraxial region of that surface is concave. Therefore, even when one surface of the lens is described as convex, the edge of the lens can be concave. Similarly, even when one surface of the lens is described as concave, the edge of the lens can be convex.

[0062] The imaging lens system described in an embodiment can be configured to be mounted on a transportation device. For example, the imaging lens system can be provided on front and rear surveillance cameras or autonomous driving cameras mounted on passenger cars, trucks, fire trucks, forklifts, etc. However, the embodiments of the imaging lens system are not limited to the above examples. For example, the imaging lens system can be mounted on an imaging camera of a reconnaissance drone or a transportation drone.

[0063] The imaging lens system according to the first embodiment 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, and a sixth lens sequentially arranged from the object side.

[0064] The imaging lens system in the first embodiment can satisfy a specific conditional expression. For example, with respect to the effective diameter D1 of the object side surface of the first lens and the horizontal field of view HFOV of the imaging surface, the imaging lens system in the first embodiment can satisfy the conditional expression: 0.23 mm / ° < D1 / HFOV < 0.35 mm / °. In addition, with respect to the height IMG HT of the imaging surface and the TTL, the imaging lens system in the first embodiment can satisfy the conditional expression: 0.15 < IMG HT / TTL < 0.20.

[0065] The imaging lens system according to the second embodiment 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, and a sixth lens arranged in order from the object side.

[0066] The imaging lens system in the second embodiment may include a lens having a predetermined shape. For example, the imaging lens system according to the second embodiment may include a first lens having a concave image side surface and a third lens having a convex image side surface. In addition, the imaging lens system according to the second embodiment may include a lens having a predetermined refractive power. For example, the imaging lens system according to the second embodiment may include a third lens having a positive refractive power.

[0067] The imaging lens system according to the second embodiment can satisfy specific conditional expressions. For example, regarding the focal length f and TTL of the imaging lens system, the imaging lens system according to the second embodiment can satisfy the conditional expression: 2.5 <TTL / f<3.2。

[0068] The imaging lens system according to the third embodiment may be configured to satisfy one or more conditional expressions. As an example, the imaging lens system according to the third embodiment may include six lenses, and may satisfy two or more conditional expressions. As another example, the imaging lens system according to the third embodiment may include six lenses, and may be configured to satisfy all of the following conditional expressions:

[0069] 2.5 <TTL / f<3.2

[0070] 0.6<|f / f3|<1.6

[0071] 0.3 <D1 / TTL<0.6

[0072] f2 / f3<0

[0073] f4 / f5<0

[0074] 55° <DFOV<61°

[0075] 5.0° / mm <DFOV / f<6.0° / mm

[0076] 25mm<|f45|<70mm

[0077] In the above conditional expressions, TTL is the distance from the object side surface of the first lens to the imaging surface, f is the focal length of the imaging lens system, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f5 is the focal length of the fifth lens, DFOV is the field of view of the imaging surface in the diagonal direction, and f45 is the combined focal length of the fourth lens and the fifth lens. In addition, f1 is the focal length of the first lens, and f6 is the focal length of the sixth lens.

[0078] The imaging lens system can satisfy a part of the above conditional expression in the following further restricted manner:

[0079] -2.4 < f2 / f3 < -0.6

[0080] -1.6 < f4 / f5 < -0.8

[0081] The imaging lens system according to the fourth embodiment can be configured to satisfy one or more conditional expressions. For example, the imaging lens system according to the fourth embodiment can include six lenses and can satisfy two or more conditional expressions. As another example, the imaging lens system according to the fourth embodiment can include six lenses and can be configured to satisfy all of the following conditional expressions:

[0082] 1.6 < f-number < 2.1

[0083] 0.4 < IMG HT / f < 0.6

[0084] -0.6 < (R5 + R6) / (R5 - R6) < 0.4

[0085] -0.5 < (R2 + R6) / (R2 - R6) < 0.6

[0086] 1.70 < (Nd1 + Nd3) / 2 < 1.90

[0087] 1.60 < (Nd1 + Nd3 + Nd5) / 3 < 1.90

[0088] 40 < (V1 + V2 + V3 + V4) / 4 < 46

[0089] 40 < SumV / 6 < 50

[0090] 1.62 < SumNd / 6 < 1.82

[0091] 0.24 < D12 / D23 < 0.76

[0092] In the above conditional expressions, f-number is a ratio of the focal length of the imaging lens system to the entrance pupil diameter, IMG HT is the height of the imaging plane, R2 is the radius of curvature of the image side surface of the first lens, R5 is the radius of curvature of the object side surface of the third lens, R6 is the radius of curvature of the image side surface of the third lens, Nd1 is the refractive index of the first lens, Nd3 is the refractive index of the third lens, Nd5 is the refractive index of the fifth lens, 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, SumV is the sum of the Abbe numbers of the first lens to the sixth lens, SumNd is the sum of the refractive indices of the first lens to the sixth lens, D12 is the distance from the image side surface of the first lens to the object side surface of the second lens, and D23 is the distance from the image side surface of the second lens to the object side surface of the third lens.

[0093] If necessary, the imaging lens system in the embodiment may include one or more lenses having the following characteristics. For example, the imaging lens system according to the first embodiment may include one of the first lens to the sixth lens having the following characteristics. As another example, the imaging lens system according to the second embodiment to the fourth embodiment may include one or more of the first lens to the sixth lens having the following characteristics. However, the imaging lens system in the aforementioned embodiment does not necessarily include a lens having the following characteristics. In the following, the characteristics of the first lens to the sixth lens will be described.

[0094] The first lens may have a refractive power. For example, the first lens may have a positive refractive power or a negative refractive power. One surface of the first lens may be concave. For example, the first lens may have a concave image side surface. The first lens may include a spherical surface or an aspherical surface. For example, both surfaces of the first lens may be spherical. As another example, both surfaces of the first lens may be aspherical. For reference, only when both surfaces of the second lens are spherical, both surfaces of the first lens may be aspherical. The first lens may be formed of a material having high light transmittance and excellent processability. 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 greater than 1.7. As a specific example, the refractive index of the first lens may be greater than 1.70 and less than 1.79. However, the refractive index of the first lens is not limited to the above range. For example, only when the refractive index of the second lens is greater than 1.7, the first lens may have a refractive index less than 1.7. The first lens may have a predetermined Abbe number. For example, the Abbe number of the first lens may be 40 or more. As a specific example, the Abbe number of the first lens may be greater than 40 and less than 80.

[0095] The second lens may have a refractive power. For example, the second lens may have a positive refractive power or a negative refractive power. One surface of the second lens may be concave. For example, the second lens may have a concave object side surface or a concave image side surface. The second lens may include a spherical surface or an aspherical surface. For example, both surfaces of the second lens may be aspherical. As another example, both surfaces of the second lens may be spherical. The second lens may be formed of a material having high light transmittance and excellent processability. For example, the second lens may be formed of a plastic material or a glass material. The second lens may be configured to have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.5. As a specific example, the refractive index of the second lens may be greater than 1.5 and less than 1.9. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be 30 or more. As a specific example, the Abbe number of the second lens may be greater than 30 and less than 50.

[0096] The third lens may have a refractive power. For example, the third lens may have a positive refractive power. One surface of the third lens may be convex. For example, the third lens may have a convex object side surface or a convex image side surface. As another example, the third lens may have a convex object side surface and a convex image side surface. The third lens may include a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having a high light transmittance and excellent processability. For example, the third lens may be formed of a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be greater than 1.7 and less than 1.9. However, the refractive index of the third lens may not satisfy the above numerical range only when the refractive index of the first lens is less than 1.6. The third lens may have a predetermined Abbe number. For example, the Abbe number of the third lens may be greater than 30 and less than 70.

[0097] The fourth lens may have a refractive power. For example, the fourth lens may have a positive refractive power or a negative refractive power. The two surfaces of the fourth lens may be symmetrical. For example, both surfaces of the fourth lens may be convex or concave. The fourth lens may include a spherical surface. For example, both surfaces of the fourth lens may be spherical. The fourth lens may be formed of a material having high light transmittance and excellent processability. For example, the fourth lens may be formed of a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.67 and less than 1.89. The fourth lens may have a predetermined Abbe number. For example, the Abbe number of the fourth lens may be greater than 20 and less than 56.

[0098] The fifth lens may have a refractive power. For example, the fifth lens may have a positive refractive power or a negative refractive power. The two surfaces of the fifth lens may be symmetrical. For example, both surfaces of the fifth lens may be convex or concave. The fifth lens may include a spherical surface. For example, both surfaces of the fifth lens may be spherical. The fifth lens may be formed of a material having high light transmittance and excellent processability. For example, the fifth lens may be formed of a plastic material or a glass material. The fifth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fifth lens may be greater than 1.7. As a specific example, the refractive index of the fifth lens may be greater than 1.70 and less than 1.89. The fifth lens may have a predetermined Abbe number. For example, the Abbe number of the fifth lens may be less than 50. As a specific example, the Abbe number of the fifth lens may be greater than 20 and less than 50.

[0099] The sixth lens may have a refractive power. For example, the sixth lens may have a positive refractive power or a negative refractive power. One surface of the sixth lens may be convex or concave. For example, the sixth lens may have a convex object side surface or a convex image side surface. As another example, the sixth lens may have a concave object side surface or a concave image side surface. The sixth lens may include an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. The sixth lens may be formed of a material having high light transmittance and excellent processability. For example, the sixth lens may be formed of a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be greater than 1.50 and less than 1.70. The sixth lens may have a predetermined Abbe number. For example, the Abbe number of the sixth lens may be greater than 40 and less than 70.

[0100] The first to sixth lenses may include a spherical surface or an aspherical surface as described above. When the first to sixth lenses include an aspherical surface, the aspherical surface of the corresponding lens may be expressed by Equation 1.

[0101] Equation 1

[0102]

[0103] 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 an arbitrary point on the aspheric surface to the optical axis, A to H and J are aspheric constants, and Z (or SAG) is the height from an arbitrary point on the aspheric surface to the vertex of the aspheric surface in the optical axis direction.

[0104] The imaging lens system according to the above-mentioned embodiment may further include an aperture, a filter, and a cover glass. As an example, the imaging lens system may further include an aperture arranged 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 an optical filter and a cover glass arranged between the sixth lens and the imaging plane. The aperture may be configured to adjust the amount of light incident in the direction of the imaging plane. The filter may be configured to block light within a specific wavelength, and the cover glass may be configured to block foreign matter entering in the direction of the imaging plane, etc. For reference, the filter described in the embodiment may be configured to block infrared rays, but if necessary, it may be configured to block ultraviolet rays.

[0105] Hereinafter, specific embodiments of the imaging lens system will be described with reference to the accompanying drawings.

[0106] Reference Figure 1 An imaging lens system according to a first embodiment is described.

[0107] The imaging lens system 100 may include a first lens 110 , a second lens 120 , a third lens 130 , a fourth lens 140 , a fifth lens 150 , and a sixth lens 160 .

[0108] The first lens 110 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 120 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 130 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 140 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 150 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 160 may have positive refractive power and may have a convex object side surface and a concave image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 160. In this embodiment, the fourth lens 140 and the fifth lens 150 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 140 and the curvature radius of the object-side surface of the fifth lens 150 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 140 and the object-side surface of the fifth lens 150 may be substantially close to zero.

[0109] The imaging lens system 100 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the third lens 130 and the fourth lens 140, and the filter IF and the cover glass CG may be disposed between the sixth lens 160 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 110 to the sixth lens 160 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0110] Tables 1 and 2 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Figure 2 Aberration curves of the imaging lens system according to this embodiment are shown.

[0111] Table 1

[0112]

[0113]

[0114] Table 2

[0115] Face number S3 S4 S11 S12 K 5.442806E-01 -1.567027E+00 0.000000E+00 0.000000E+00 A 2.165512E-04 5.902810E-04 -1.948717E-03 -8.032534E-04 B -1.404632E-04 -1.053855E-04 C 1.190215E-05 2.275369E-06 D -1.106931E-06 4.361826E-09 E 2.610738E-08 -3.299868E-10

[0116] Reference Figure 3 An imaging lens system according to a second embodiment is described.

[0117] The imaging lens system 200 may include a first lens 210 , a second lens 220 , a third lens 230 , a fourth lens 240 , a fifth lens 250 , and a sixth lens 260 .

[0118] The first lens 210 may have a negative refractive power and may have a concave object side surface and a concave image side surface. The second lens 220 may have a negative refractive power and may have a concave object side surface and a convex image side surface. The third lens 230 may have a positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 240 may have a positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 250 may have a negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 260 may have a positive refractive power and may have a convex object side surface and a convex image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 260.

[0119] The imaging lens system 200 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the second lens 220 and the third lens 230, and the filter IF and the cover glass CG may be disposed between the sixth lens 260 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 210 to the sixth lens 260 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0120] Tables 3 and 4 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Figure 4 Aberration curves of the imaging lens system according to this embodiment are shown.

[0121] Table 3

[0122] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens -28.092 1.000 1.552 75.5 5.776 S2 28.957 2.240 5.285 S3 Second lens -8.000 2.800 1.778 47.2 5.154 S4 -12.976 3.383 5.197 S5 Aperture infinity 0.030 5.099 S6 The third lens 12.706 2.800 1.595 68.6 6.084 S7 -41.239 1.913 6.145 S8 The fourth lens 10.508 2.830 1.777 49.5 6.302 S9 -122.303 1.082 6.135 S10 Fifth lens -23.868 1.068 1.760 25.0 5.803 S11 8.147 0.680 5.145 S12 The sixth lens 11.511 2.800 1.777 49.5 5.433 S13 -64.971 2.722 4.977 S14 Optical Filters infinity 0.400 1.519 64.2 5.066 S15 infinity 0.550 5.077 S16 Cover glass infinity 0.400 1.519 64.2 5.100 S17 infinity 5.659 5.111 S18 Imaging surface infinity 0.000 5.351

[0123] Table 4

[0124] Face number S3 S4 S12 S13 K -9.881809E-02 7.777624E-01 4.252814E-04 7.288455E-04 A 7.535680E-04 5.706888E-04 6.576068E-06 1.581817E-05 B 4.310840E-06 3.752684E-06 -4.022184E-09 -1.540529E-07 C -2.453584E-08 7.155995E-09 4.084082E-09 1.929469E-08

[0125] Reference Figure 5 An imaging lens system according to a third embodiment is described.

[0126] The imaging lens system 300 may include a first lens 310 , a second lens 320 , a third lens 330 , a fourth lens 340 , a fifth lens 350 , and a sixth lens 360 .

[0127] The first lens 310 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 320 may have negative refractive power and may have a convex object side surface and a concave image side surface. The third lens 330 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 340 may have negative refractive power and may have a concave object side surface and a concave image side surface. The fifth lens 350 may have positive refractive power and may have a convex object side surface and a convex image side surface. The sixth lens 360 may have positive refractive power and may have a concave object side surface and a convex image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 360. In this embodiment, the fourth lens 340 and the fifth lens 350 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 340 and the curvature radius of the object-side surface of the fifth lens 350 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 340 and the object-side surface of the fifth lens 350 may be substantially close to zero.

[0128] The imaging lens system 300 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the second lens 320 and the third lens 330, and the filter IF and the cover glass CG may be disposed between the sixth lens 360 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 310 to the sixth lens 360 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0129] Tables 5 and 6 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Figure 6 Aberration curves of the imaging lens system according to this embodiment are shown.

[0130] Table 5

[0131]

[0132]

[0133] Table 6

[0134] Face number S3 S4 S6 S7 S11 S12 K 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 9.62630E+00 1.19220E+00 A -2.00556E-04 2.00965E-04 2.80697E-05 3.86819E-04 4.40961E-04 1.41768E-03 B 2.75929E-06 -1.34756E-07 2.12179E-06 -4.90220E-07 1.30091E-06 2.73979E-05 C 7.61748E-10 -4.20402E-07 D -8.97563E-08 -1.56414E-08

[0135] Reference Figure 7 An imaging lens system according to a fourth embodiment is described.

[0136] The imaging lens system 400 may include a first lens 410 , a second lens 420 , a third lens 430 , a fourth lens 440 , a fifth lens 450 , and a sixth lens 460 .

[0137] The first lens 410 may have a negative refractive power and may have a concave object side surface and a concave image side surface. The second lens 420 may have a positive refractive power and may have a concave object side surface and a convex image side surface. The third lens 430 may have a positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 440 may have a positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 450 may have a negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 460 may have a positive refractive power and may have a concave object side surface and a convex image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 460. In this embodiment, the fourth lens 440 and the fifth lens 450 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 440 and the curvature radius of the object-side surface of the fifth lens 450 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 440 and the object-side surface of the fifth lens 450 may be substantially close to zero.

[0138] The imaging lens system 400 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the second lens 420 and the third lens 430, and the filter IF and the cover glass CG may be disposed between the sixth lens 460 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 410 to the sixth lens 460 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0139] Tables 7 and 8 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Figure 8 Aberration curves of the imaging lens system according to this embodiment are shown.

[0140] Table 7

[0141] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens -73.506 1.000 1.777 49.6 5.209 S2 17.566 2.455 4.752 S3 Second lens -7.097 2.599 1.748 44.9 4.733 S4 -7.661 2.360 5.254 S5 Aperture infinity 0.959 5.035 S6 The third lens 26.611 2.865 1.725 50.5 6.111 S7 -13.630 0.130 6.141 S8 The fourth lens 13.000 4.095 1.701 55.0 5.919 S9 Fifth lens -15.026 0.500 1.779 24.7 5.509 S10 10.450 1.845 4.901 S11 The sixth lens -17.178 2.364 1.758 52.4 4.904 S12 -11.803 2.722 4.936 S13 Optical Filters infinity 0.400 1.519 64.2 5.072 S14 infinity 0.550 5.083 S15 Cover glass infinity 0.400 1.519 64.2 5.106 S16 infinity 5.256 5.117 S17 Imaging surface infinity 0.000 5.345

[0142] Table 8

[0143] Face number S3 S4 S11 S12 K 7.83667E-03 -1.30191E-01 7.89275E+00 2.96276E+00 A -2.90564E-04 2.35950E-04 9.08003E-04 9.33734E-04 B 2.16128E-05 8.82309E-06 9.36894E-06 1.23129E-05 C 2.54554E-07 1.65942E-07 -4.42549E-08 1.69766E-07 D -1.10355E-08 -5.04862E-09 -2.56948E-09 7.21125E-10

[0144] Reference Fig. 9 An imaging lens system according to a fifth embodiment is described.

[0145] The imaging lens system 500 may include a first lens 510 , a second lens 520 , a third lens 530 , a fourth lens 540 , a fifth lens 550 , and a sixth lens 560 .

[0146] The first lens 510 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 520 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 530 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 540 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 550 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 560 may have positive refractive power and may have a convex object side surface and a concave image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 560. In this embodiment, the fourth lens 540 and the fifth lens 550 may be combined with each other. In more detail, the radius of curvature of the image-side surface of the fourth lens 540 and the radius of curvature of the object-side surface of the fifth lens 550 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 540 and the object-side surface of the fifth lens 550 may be substantially close to zero.

[0147] The imaging lens system 500 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the second lens 520 and the third lens 530, and the filter IF and the cover glass CG may be disposed between the sixth lens 560 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 510 to the sixth lens 560 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0148] Tables 9 and 10 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig.10 Aberration curves of the imaging lens system according to this embodiment are shown.

[0149] Table 9

[0150] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 10.000 2.669 1.776 49.6 5.629 S2 16.155 1.139 4.652 S3 Second lens -20.453 0.750 1.593 42.8 4.678 S4 6.000 3.940 3.776 S5 Aperture infinity 0.625 3.335 S6 The third lens 12.275 1.676 1.823 43.0 4.232 S7 -29.631 1.733 4.295 S8 The fourth lens 10.154 3.788 1.751 46.2 4.508 S9 Fifth lens -6.338 0.750 1.792 24.2 4.335 S10 22.460 4.330 3.943 S11 The sixth lens 18.087 2.450 1.585 61.0 3.680 S12 29.050 0.520 4.691 S13 Optical Filters infinity 0.400 1.519 64.2 5.001 S14 infinity 0.562 5.039 S15 Cover glass infinity 0.400 1.519 64.2 5.122 S16 infinity 1.178 5.160 S17 Imaging surface infinity 0.000 5.345

[0151] Table 10

[0152]

[0153]

[0154] Reference Fig.11 An imaging lens system according to a sixth embodiment is described.

[0155] The imaging lens system 600 may include a first lens 610 , a second lens 620 , a third lens 630 , a fourth lens 640 , a fifth lens 650 , and a sixth lens 660 .

[0156] The first lens 610 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 620 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 630 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 640 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 650 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 660 may have positive refractive power and may have a convex object side surface and a concave image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 660. In this embodiment, the fourth lens 640 and the fifth lens 650 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 640 and the curvature radius of the object-side surface of the fifth lens 650 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 640 and the object-side surface of the fifth lens 650 may be substantially close to zero.

[0157] The imaging lens system 600 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the second lens 620 and the third lens 630, and the filter IF and the cover glass CG may be disposed between the sixth lens 660 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 610 to the sixth lens 660 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0158] Tables 11 and 12 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig.12 Aberration curves of the imaging lens system according to this embodiment are shown.

[0159] Table 11

[0160]

[0161]

[0162] Table 12

[0163] Face number S3 S4 S11 S12 K 7.98492E+00 -1.29231E+00 0.00000E+00 4.95617E+00 A 2.54365E-04 4.82166E-04 -1.75631E-03 -5.55872E-04 B -3.92538E-07 -2.03874E-07 -3.20451E-05 -9.98970E-05 C 5.87931E-08 9.36439E-08 -2.51873E-06 2.21204E-06 D -2.38878E-08

[0164] Reference Fig.13 An imaging lens system according to a seventh embodiment is described.

[0165] The imaging lens system 700 may include a first lens 710 , a second lens 720 , a third lens 730 , a fourth lens 740 , a fifth lens 750 , and a sixth lens 760 .

[0166] The first lens 710 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 720 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 730 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 740 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 750 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 760 may have negative refractive power and may have a convex object side surface and a concave image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 760. In this embodiment, the fourth lens 740 and the fifth lens 750 may be combined with each other. In more detail, the radius of curvature of the image-side surface of the fourth lens 740 and the radius of curvature of the object-side surface of the fifth lens 750 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 740 and the object-side surface of the fifth lens 750 may be substantially close to zero.

[0167] The imaging lens system 700 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the third lens 730 and the fourth lens 740, and the filter IF and the cover glass CG may be disposed between the sixth lens 760 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 710 to the sixth lens 760 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0168] Table 13 and Table 14 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig.14 Aberration curves of the imaging lens system according to this embodiment are shown.

[0169] Table 13

[0170] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 10.597 1.378 1.776 49.6 5.743 S2 20.366 1.600 5.481 S3 Second lens -15.905 0.550 1.577 38.6 5.550 S4 6.000 4.452 4.584 S5 The third lens 12.733 3.525 1.888 40.8 4.664 S6 -23.591 1.428 4.283 S7 Aperture infinity 1.437 3.233 S8 The fourth lens 10.354 2.262 1.697 49.5 3.609 S9 Fifth lens -6.992 0.800 1.812 23.7 3.595 S10 41.748 5.089 3.627 S11 The sixth lens 44.983 3.500 1.555 58.9 4.072 S12 31.949 0.520 5.082 S13 Optical Filters infinity 0.400 1.519 64.2 5.218 S14 infinity 0.562 5.246 S15 Cover glass infinity 0.400 1.519 64.2 5.306 S16 infinity 0.100 5.334 S17 Imaging surface infinity 0.000 5.345

[0171] Table 14

[0172] Face number S3 S4 S11 S12 K 3.95997E+00 -1.32152E+00 0.00000E+00 3.19494E+01 A 1.92067E-04 4.74460E-04 -1.72200E-03 1.34595E+01 B 1.77871E-06 -1.03994E-06 -5.12353E-05 -3.92632E-04 C 3.65087E-08 5.66446E-08 1.65233E-06 -1.13089E-04 D -2.28035E-07 1.77916E-06 E 7.29476E-09 3.58179E-08 F -6.62678E-10

[0173] Reference Fig.15 An imaging lens system according to an eighth embodiment is described.

[0174] The imaging lens system 800 may include a first lens 810 , a second lens 820 , a third lens 830 , a fourth lens 840 , a fifth lens 850 , and a sixth lens 860 .

[0175] The first lens 810 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 820 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 830 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 840 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 850 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 860 may have negative refractive power and may have a concave object side surface and a concave image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 860. In this embodiment, the fourth lens 840 and the fifth lens 850 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 840 and the curvature radius of the object-side surface of the fifth lens 850 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 840 and the object-side surface of the fifth lens 850 may be substantially close to zero.

[0176] The imaging lens system 800 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the third lens 830 and the fourth lens 840, and the filter IF and the cover glass CG may be disposed between the sixth lens 860 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 810 to the sixth lens 860 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0177] Table 15 and Table 16 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig.16 Aberration curves of the imaging lens system according to this embodiment are shown.

[0178] Table 15

[0179]

[0180]

[0181] Table 16

[0182] Face number S3 S4 S5 S6 S11 S12 K 2.21547E+00 -1.44874E+00 -4.60294E-01 1.98166E-02 0.00000E+00 0.00000E+00 A 9.68423E-05 3.93995E-04 -3.85667E-05 1.57301E-07 -1.95405E-03 -7.24813E-04 B 1.64792E-06 -3.36259E-06 -6.82706E-07 -1.15687E-07 -5.97650E-05 -1.01180E-04 C 5.10232E-07 3.13782E-06 D -1.08215E-07 -3.61878E-08

[0183] Reference Fig.17 An imaging lens system according to a ninth embodiment is described.

[0184] The imaging lens system 900 may include a first lens 910 , a second lens 920 , a third lens 930 , a fourth lens 940 , a fifth lens 950 , and a sixth lens 960 .

[0185] The first lens 910 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 920 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 930 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 940 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fifth lens 950 may have negative refractive power and may have a concave object side surface and a concave image side surface. The sixth lens 960 may have positive refractive power and may have a convex object side surface and a convex image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 960. In this embodiment, the fourth lens 940 and the fifth lens 950 may be combined with each other. In more detail, the radius of curvature of the image-side surface of the fourth lens 940 and the radius of curvature of the object-side surface of the fifth lens 950 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 940 and the object-side surface of the fifth lens 950 may be substantially close to zero.

[0186] The imaging lens system 900 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the third lens 930 and the fourth lens 940, and the filter IF and the cover glass CG may be disposed between the sixth lens 960 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 910 to the sixth lens 960 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0187] Table 17 and Table 18 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig.18 Aberration curves of the imaging lens system according to this embodiment are shown.

[0188] Table 17

[0189] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 15.589 1.191 1.776 49.6 5.921 S2 44.650 1.700 5.728 S3 Second lens -12.023 1.000 1.596 35.8 5.562 S4 7.285 3.502 4.646 S5 The third lens 16.102 1.800 1.888 40.8 4.772 S6 -21.235 1.830 4.707 S7 Aperture infinity 2.771 3.530 S8 The fourth lens 9.993 3.916 1.870 41.3 4.578 S9 Fifth lens -8.042 1.000 1.863 22.5 4.418 S10 15.076 3.151 4.267 S11 The sixth lens 34.179 1.943 1.584 61.2 4.158 S12 -90.077 0.520 4.785 S13 Optical Filters infinity 0.400 1.519 64.2 4.971 S14 infinity 0.562 5.000 S15 Cover glass infinity 0.400 1.519 64.2 5.063 S16 infinity 2.314 5.092 S17 Imaging surface infinity 0.000 5.348

[0190] Table 18

[0191] Face number S3 S4 S11 S12 K 1.29022E+00 -1.57016E+00 5.71980E+01 0.00000E+00 A 2.67662E-04 3.88988E-04 -2.00205E-03 -8.33606E-04 B 3.74058E-06 2.62589E-06 -8.14225E-05 -8.65352E-05 C -1.65000E-08 1.73519E-08 -1.73308E-06 1.60419E-06

[0192] Reference Fig.19 An imaging lens system according to a tenth embodiment is described.

[0193] The imaging lens system 1000 may include 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 .

[0194] The first lens 1010 may have positive refractive power and may have a convex object side surface and a concave image side surface. The second lens 1020 may have negative refractive power and may have a concave object side surface and a concave image side surface. The third lens 1030 may have positive refractive power and may have a convex object side surface and a convex image side surface. The fourth lens 1040 may have negative refractive power and may have a concave object side surface and a concave image side surface. The fifth lens 1050 may have positive refractive power and may have a convex object side surface and a convex image side surface. The sixth lens 1060 may have positive refractive power and may have a convex object side surface and a convex image side surface. An inflection point may be formed on the object side surface and the image side surface of the sixth lens 1060. In this embodiment, the fourth lens 1040 and the fifth lens 1050 may be combined with each other. In more detail, the curvature radius of the image-side surface of the fourth lens 1040 and the curvature radius of the object-side surface of the fifth lens 1050 may be configured to be the same, and an air gap between the image-side surface of the fourth lens 1040 and the object-side surface of the fifth lens 1050 may be substantially close to zero.

[0195] The imaging lens system 1000 may further include a stop ST, a filter IF, a cover glass CG, and an imaging surface IP. The stop ST may be disposed between the third lens 1030 and the fourth lens 1040, and the filter IF and the cover glass CG may be disposed between the sixth lens 1060 and the imaging surface IP. The imaging surface IP may be formed at a position where light incident through the first lens 1010 to the sixth lens 1060 is focused. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.

[0196] Tables 19 and 20 list the lens characteristics and aspherical values ​​of the imaging lens system according to this embodiment, and Fig. 20 Aberration curves of the imaging lens system according to this embodiment are shown.

[0197] Table 19

[0198]

[0199]

[0200] Table 20

[0201] Face number S1 S2 S11 S12 K 0.00000E+00 0.00000E+00 0.00000E+00 2.02040E+00 A -6.01462E-05 -1.06559E-04 -1.15624E-03 -6.15169E-04 B 1.03259E-06 9.75900E-07 -4.70360E-05 -4.77791E-05 C 2.11703E-08 9.80144E-08 -4.73566E-07 9.05485E-07 D 1.23817E-10 -1.31001E-09

[0202] Table 21 and Table 22 list optical characteristic values ​​and conditional expression values ​​of the imaging lens systems according to the first embodiment to the tenth embodiment.

[0203] Table 21

[0204]

[0205]

[0206] Table 22

[0207]

[0208] According to the above-described embodiment, an imaging lens system can be provided which can reduce variation in lens size and can achieve high resolution.

[0209] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are understood in a descriptive sense only and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are replaced or supplemented in different ways and / or by other components or their equivalents, appropriate results can still be achieved. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. An imaging lens system, comprising: A first lens having a refractive power; A second lens having a concave object side; A third lens having a positive refractive power and a convex image side; A fourth lens having a refractive power; A fifth lens having a refractive power; And A sixth lens having a refractive power, wherein the first lens to the sixth lens are arranged in sequence from the object side, wherein the sign of the refractive power of the fourth lens is different from the sign of the refractive power of the fifth lens, wherein the imaging lens system has a total of six lenses, and wherein 2.5 < TTL / f < 3.2, 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.

2. The imaging lens system according to claim 1, wherein: The first lens has a convex object side.

3. The imaging lens system according to claim 1, wherein: The third lens has a convex object side.

4. The imaging lens system according to claim 1, wherein: The fourth lens has a convex object side.

5. The imaging lens system according to claim 1, wherein: The fifth lens has a concave object side.

6. The imaging lens system according to claim 1, wherein: The sixth lens has a convex object side.

7. An imaging lens system, comprising: A first lens having a refractive power; A second lens having a refractive power; A third lens having a positive refractive power and a convex image side; A fourth lens having a refractive power; A fifth lens having a refractive power; And A sixth lens having a refractive power, wherein the first lens to the sixth lens are arranged in sequence from the object side, wherein the sign of the refractive power of the fourth lens is different from the sign of the refractive power of the fifth lens, wherein the imaging lens system has a total of six lenses, and wherein 2.5 < TTL / f < 3.2 and 0.24 < D12 / D23 < 0.76, wherein TTL is the distance from the object side of the first lens to the imaging surface, f is the focal length of the imaging lens system, D12 is the distance from the image side of the first lens to the object side of the second lens, and D23 is the distance from the image side of the second lens to the object side of the third lens.

8. The imaging lens system according to claim 7, wherein: The first lens has a convex object side.

9. The imaging lens system according to claim 7, wherein: The third lens has a convex object side.

10. The imaging lens system according to claim 7, wherein: The fourth lens has a convex object side.

11. The imaging lens system according to claim 7, wherein: The fifth lens has a concave object side.

12. The imaging lens system according to claim 7, wherein: The sixth lens has a convex object side.

Images