Imaging lens system

Abstract

An imaging lens system is provided. The imaging lens system includes: a first lens group including one or more lenses; and a second lens group including one or more lenses and configured to be movable in the optical axis direction. The first lens group and the second lens group are arranged in this order from the object side toward the imaging plane. The imaging lens system satisfies a conditional expression TTL / (IMG HT * 2) lt; wherein TTL is the distance from the object side of the foremost lens disposed closest to the object to the imaging plane, and IMG HT is the height of the imaging plane.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0154657 filed in the Korean Intellectual Property Office on November 9, 2023, the disclosure of which is incorporated herein in its entirety for all purposes by reference. Technical Field

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

[0004] Portable electronic devices include camera modules that capture still images or record moving images.

[0005] For example, the camera module may be mounted on a portable electronic device such as, but not limited to, a mobile phone, a laptop computer, or a game console. Such portable electronic devices are generally manufactured to be compact or small in size to increase user convenience when carrying these devices. Therefore, the camera module mounted on the portable electronic device is configured to have an imaging lens system with a limited form factor. For example, the camera module includes an imaging lens system with a fixed focal length. Therefore, the imaging lens system of such a camera module can only capture images of objects within a specific range (e.g., a close distance or a long distance), and it may be difficult to capture images of objects outside the range. Summary of the invention

[0006] The purpose of providing this summary is to introduce a selection of concepts in a concise form, and these concepts will be further described in the following detailed description. This summary is not intended to identify the 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.

[0007] In general, an imaging lens system includes: a first lens group including one or more lenses; and a second lens group including one or more lenses and configured to be movable in an optical axis direction, wherein the first lens group and the second lens group are arranged sequentially from the object side toward an imaging plane, and wherein the imaging lens system satisfies the following conditional expression: TTL / (IMG HT×2)<0.850, wherein TTL is the distance from the object side surface of the frontmost lens disposed closest to the object to the imaging plane, and IMGHT is the height of the imaging plane.

[0008] The frontmost lens may have a convex image-side surface.

[0009] A rear lens in the first lens group that is disposed closest to the second lens group may have a convex image-side surface.

[0010] The front lens closest to the first lens group in the second lens group may have a concave object side surface.

[0011] The last lens closest to the imaging surface may have a concave image side surface.

[0012] fG1 / fG1F < 1.10, where fG1 is the focal length of the first lens group, and fG1F is the focal length of the foremost lens.

[0013] fG2 / fG2F < 1.0, where fG2 is the focal length of the second lens group, and fG2F is the focal length of the lens closest to the object in the second lens group.

[0014] fG1 / f < 0.550, where fG1 is the focal length of the first lens group, and f is the focal length of the imaging lens system.

[0015] In general, 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 order from the object side toward the imaging surface, where the first lens has a convex image side surface, and where -1.2 < f1 / f4 < -0.40, where f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens.

[0016] The first lens may have a convex object side surface.

[0017] The second lens may have a concave image side surface.

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

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

[0020] The fifth lens may have a convex image side surface.

[0021] The imaging lens system may further include a seventh lens disposed on the image side of the sixth lens.

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

[0023] In general, the electronic device includes an imaging lens system that includes 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 toward the imaging surface, where the imaging lens system satisfies the following conditional expression: TTL / (IMG HT × 2) < 0.850, where TTL is the distance from the object side surface of the foremost lens closest to the object to the imaging surface, and IMG HT is the height of the imaging surface.

[0024] The imaging lens system may further include a seventh lens disposed on the image side of the sixth lens.

[0025] Other features and aspects will be apparent from the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A configuration diagram of an exemplary imaging lens system according to the first embodiment is shown.

[0027] Figure 2 Shows Figure 1 Aberration curves for the exemplary imaging lens system shown in .

[0028] Figure 3 A configuration diagram of an exemplary imaging lens system according to the second embodiment is shown.

[0029] Figure 4 Shows Figure 3 Aberration curves for the exemplary imaging lens system shown in .

[0030] Figure 5 A configuration diagram of an exemplary imaging lens system according to a third embodiment is shown.

[0031] Figure 6 Shows Figure 5 Aberration curves for the exemplary imaging lens system shown in .

[0032] Figure 7 A configuration diagram of an exemplary imaging lens system according to a fourth embodiment is shown.

[0033] Figure 8 Shows Figure 7 Aberration curves for the exemplary imaging lens system shown in .

[0034] Fig. 9 A configuration diagram of an exemplary imaging lens system according to a fifth embodiment is shown.

[0035] Fig.10 Shows Fig. 9 Aberration curves for the exemplary imaging lens system shown in .

[0036] Fig.11 A configuration diagram of an exemplary imaging lens system according to a sixth embodiment is shown.

[0037] Fig.12 Shows Fig.10 Aberration curves for the exemplary imaging lens system shown in .

[0038] Fig.13 A configuration diagram of an exemplary imaging lens system according to a seventh embodiment is shown.

[0039] Fig.14 Shows Fig.13 Aberration curves for the exemplary imaging lens system shown in .

[0040] Fig.15 A configuration diagram of an exemplary imaging lens system according to an eighth embodiment is shown.

[0041] Fig.16 Shows Fig.15 Aberration curves for the exemplary imaging lens system shown in .

[0042] Fig.17 Another form of the exemplary imaging lens system according to the first to eighth embodiments is shown.

[0043] Fig.18 An exemplary electronic device including the exemplary imaging lens system according to the first to eighth embodiments is shown.

[0044] Throughout the drawings and detailed description, unless otherwise described, 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 descriptions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0045] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the method, device and / or system described herein. However, various changes, modifications and equivalents of the method, device and / or system described herein will be apparent after understanding the disclosure of the application. For example, the order in the operation described herein and / or the order of the operation described herein are merely examples, and except for the order in the operation that must occur in a specific sequence and / or the order of operations, it is not limited to the order set forth herein, but can be changed, which will be apparent after understanding the disclosure of the application. As another example, except for at least a portion of the order in the operation that must occur in a sequence (e.g., a specific sequence) and / or the order in the operation, the order in the operation and / or the operation can be performed in parallel. In addition, for greater clarity and brevity, the description of the features known after understanding the disclosure of the application can be omitted.

[0046] Although terms such as "first", "second" and "third" or A, B, (a), (b) 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. Each of these terms is not used to define, for example, the importance, sequence or order of the corresponding member, component, region, layer or portion, but is only used to distinguish the corresponding member, component, region, layer or portion from other members, components, regions, layers or portions. 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.

[0047] Throughout the specification, when a component, element or layer is described as being "on another component, element or layer," "connected to," "coupled to," or "engaged to" another component, element or layer, it may be directly "on another component, element or layer," directly "connected to," "coupled to," or "engaged to" another component, element or layer (e.g., in contact with another component, element or layer), or there may reasonably be one or more other components, elements or layers between the component, element or layer and the other component, element or layer. When a component, element or layer is described as being "directly on another component, element or layer," "directly connected to," "directly coupled to," or "directly engaged to" another component, element or layer, there are no other components, elements or layers between the component, element or layer and the other component, element or layer. Similarly, expressions such as "between" and "directly between," as well as "adjacent" and "directly adjacent" may also be interpreted as described above.

[0048] 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 terms "one", "an" and "the" are intended to include plural forms as well. As non-limiting examples, the terms "comprise", "include" and "have" illustrate the existence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof, or the existence of alternative features, quantities, operations, components, elements and / or combinations thereof. In addition, although an embodiment can set forth the terms "comprise", "include" and "have" to illustrate the existence of the described features, quantities, operations, components, elements and / or combinations thereof, other embodiments may exist, in which one or more of the described features, quantities, operations, components, elements and / or combinations thereof are not present.

[0049] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items. The phrases "at least one of A, B, and C," etc. are intended to have a disjunctive meaning, and these phrases "at least one of A, B, and C," etc. also include examples in which one or more of A, B, and C may be present (e.g., any combination of one or more of A, B, and C), unless the corresponding description and implementation require that the enumeration (e.g., "at least one of A, B, and C") be interpreted as having a conjunctive meaning.

[0050] The features described herein may be embodied in different forms and should not be construed as being limited to the examples described herein. On the contrary, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application. In this article, the use of the wording "may" relative to an example or implementation (e.g., content that may be included or implemented with respect to an example or implementation) means that there is at least one example or implementation that includes or implements such a feature, and all examples or implementations are not limited thereto. The words "example" or "implementation" used herein have the same meaning (e.g., the phrase "in one example" has the same meaning as "in one implementation", and "in one or more examples" has the same meaning as "in one or more implementations").

[0051] One or more examples may provide an imaging lens system that images and photographs objects at near and far distances.

[0052] One or more examples may provide an imaging lens system configured to be capable of capturing images of objects located at relatively close distances, rather than only capturing images of objects located at distant points.

[0053] One or more examples may provide an imaging lens system that captures and records images of not only objects located at distant points or locations with high resolution, but also objects located at close distances with high resolution.

[0054] In one or more examples, the first lens refers to the lens closest to the object (or subject), and the sixth lens or the seventh lens refers to the lens closest to the imaging plane (or image sensor). In one or more embodiments, the units of the radius of curvature, thickness, TTL (the distance from the object side of the first lens to the imaging plane), IMG HT (the height of the imaging plane), and focal length are expressed in millimeters (mm).

[0055] The thickness of the lens, the gap between lenses, and TTL refer to the distance of the lens along 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 the surface is convex, and a configuration in which one surface is concave means that the paraxial region of the surface is concave. Therefore, even when one surface of the lens is described as convex, the edge of the lens may be concave. Similarly, even when one surface of the lens is described as concave, the edge of the lens may be convex.

[0056] The imaging lens system according to the first aspect may include two lens groups. For example, the imaging lens system according to the first aspect may include a first lens group and a second lens group arranged sequentially from the object side toward the imaging surface. The first lens group and the second lens group may include one or more lenses, respectively. For example, the first lens group may be composed of three lenses, and the second lens group may be composed of three or four lenses. However, the number of lenses constituting the first lens group and the second lens group is not limited to the above form. The imaging lens system according to the first aspect may include a lens group movable in the optical axis direction. For example, in the imaging lens system according to the first aspect, the second lens group may be configured to be movable in the optical axis direction. The imaging lens system according to the first aspect may satisfy a specific conditional expression. For example, the imaging lens system according to the first aspect may satisfy the conditional expression TTL / (IMG HT×2)<0.850, where TTL is the distance from the object side of the frontmost lens set closest to the object to the imaging surface, and IMG HT is the height of the imaging surface.

[0057] The imaging lens system according to the first aspect may include a predetermined lens. For example, the imaging lens system according to the first aspect may include a lens having a convex image side surface. For example, in the imaging lens system according to the first aspect, the front lens may have a convex image side surface. As another example, in the imaging lens system according to the first aspect, the lens closest to the imaging surface in the first lens group may have a convex image side surface. The imaging lens system according to the first aspect may also include a lens having a concave image side surface. For example, in the imaging lens system according to the first aspect, the lens closest to the object in the second lens group may have a concave image side surface. As another example, in the imaging lens system according to the first aspect, the last lens disposed closest to the imaging surface may have a concave image side surface.

[0058] The imaging lens system according to the second aspect may include a first lens group and a second lens group arranged sequentially from the object side toward the imaging surface, and may include one or more lenses having a convex image side surface. For example, in the imaging lens system according to the second aspect, the frontmost lens disposed closest to the object may have a convex image side surface. The imaging lens system according to the second aspect may be configured to satisfy a specific conditional expression. For example, the imaging lens system according to the second aspect may satisfy one or more of the following conditional expressions.

[0059] f / (SD1×2)<1.90

[0060] 0.90<|fG1 / fG2|<1.20

[0061] 0.90 <TTL / f<1.10

[0062] |fG22 / (L-fG)| / AF<0.80

[0063] TTL / (IMG HT×2)<0.85

[0064] fG1 / fG1F<1.10

[0065] fG2 / fG2F<1.0

[0066] fG1 / f<0.55

[0067] SD1 / SD7<2.0

[0068] In the above conditional expressions, f is the focal length of the imaging lens system, SD1 is the effective radius of the front lens, fG1 is the focal length of the first lens group, fG2 is the focal length of the second lens group, L is the maximum approach distance that the imaging lens system can capture (the distance from the object side of the front lens to the object (or subject)), AF is the maximum drive distance of the second lens group, fG1F is the focal length of the front lens, fG2F is the focal length of the lens closest to the object in the second lens group, and SD7 is the effective radius of the lens closest to the object in the second lens group.

[0069] The imaging lens system according to the third aspect may include one or more of the characteristics according to the first aspect and the second aspect, and may be configured to satisfy one or more of the following conditional expressions. As an example, the imaging lens system according to the third aspect may include the characteristics according to the first aspect and satisfy one or more of the following conditional expressions. As another example, the imaging lens system according to the third aspect may include the characteristics according to the second aspect and satisfy two or more of the following conditional expressions.

[0070] -1.20 <fG1F / fG2F<-0.40

[0071] 0.60 < fG1F / fG1R < 1.0

[0072] 0.30 < fG2F / fG2R < 1.0

[0073] -1.60 < fG1R / fG2F < -0.80

[0074] -0.80 < fG1R / fG2R < -0.10

[0075] In the above conditional expressions, fG1R is the focal length of the lens closest to the imaging surface in the first lens group, and fG2R is the focal length of the lens closest to the imaging surface in the second lens group.

[0076] The imaging lens system according to the fourth aspect includes a plurality of lenses arranged in order from the object side toward the imaging surface. As an example, the imaging lens system according to the fourth aspect 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 toward the imaging surface. As another example, the imaging lens system according to the fourth aspect may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from the object side toward the imaging surface. The imaging lens system according to the fourth aspect may include a lens having a convex image side surface. For example, in the imaging lens system according to the fourth aspect, the first lens may have a convex image side surface. The imaging lens system according to the fourth aspect may satisfy a specific conditional expression. As an example, the imaging lens system according to the fourth aspect may satisfy the conditional expression -1.20 < f1 / f4 < -0.40. In the conditional expression, f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens.

[0077] The imaging lens system according to the fifth aspect includes a plurality of lenses arranged in order from the object side toward the imaging surface and may satisfy one or more of the following conditional expressions. As an example, the imaging lens system according to the fifth aspect includes 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 and may satisfy one or more of the following conditional expressions. As another example, the imaging lens system according to the fifth aspect includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from the object side toward the imaging surface and may satisfy one or more of the following conditional expressions.

[0078] -1.20 < f1 / f4 < -0.40

[0079] 0.60 < f1 / f3 < 1.0

[0080] -1.60 < f3 / f4 < -0.80

[0081] -0.80 <f3 / f6<-0.30

[0082] -0.50 <f3 / f7<-0.20

[0083] 0.30 <f4 / f6<1.0

[0084] 0.30 <f4 / f7<0.40

[0085] In the above conditional expressions, 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, and f7 is the focal length of the seventh lens.

[0086] The imaging lens system according to the sixth aspect includes a plurality of lenses arranged sequentially from the object side toward the imaging surface, and one or more of the following conditional expressions may be satisfied. As an example, the imaging lens system according to the sixth aspect includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side toward the imaging surface, and one or more of the following conditional expressions may be satisfied. As another example, the imaging lens system according to the sixth aspect includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side toward the imaging surface, and one or more of the following conditional expressions may be satisfied.

[0087] 0.30 <R1 / R5<0.80

[0088] -0.80 <R1 / R6<-0.30

[0089] -1.40 <R1 / R7<-0.80

[0090] -2.10 <R2 / R5<-1.0

[0091] 1.0 <R2 / R6<2.0

[0092] -3.0 <R5 / R7<-1.20

[0093] 1.20 <R6 / R7<3.0

[0094] In the above conditional expressions, R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens.

[0095] The imaging lens system according to the seventh aspect may be configured to include two or more of the characteristics according to the first aspect to the sixth aspect. As an example, the imaging lens system according to the seventh aspect may include the characteristics according to the first aspect and satisfy one or more of the conditional expressions according to the fifth aspect. As another example, the imaging lens system according to the seventh aspect may include the characteristics according to the first aspect and satisfy one or more of the conditional expressions according to the sixth aspect.

[0096] The imaging lens system according to the present disclosure may include one or more lenses having the following characteristics as needed. As an example, the imaging lens system according to the first aspect may include one of the first lens to the seventh lens having the following characteristics. As another example, the imaging lens system according to the second aspect to the fourth aspect may include one or more of the first lens to the seventh lens having the following characteristics. However, the imaging lens system according to the above aspects does not necessarily include a lens having the following characteristics. Below, the characteristics of the first lens to the seventh lens will be described.

[0097] The first lens may have a refractive power. For example, the first lens may have a positive refractive power. The first lens may have a convex shape on one surface. For example, the first lens may have a convex object side surface. The first lens may include a spherical surface or an aspherical surface. For example, both surfaces of the first lens may be aspherical. The first lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the first lens may be formed of a plastic material or glass. The first lens may be configured to have a high refractive index. For example, the refractive index of the first lens may be greater than 1.5. As a specific example, the refractive index of the first lens may be greater than 1.50 and less than 1.6. The first lens may have a predetermined Abbe number. For example, the Abbe number of the first lens may be 50 or more. As a specific example, the Abbe number of the first lens may be greater than 50 and less than 60.

[0098] The second lens may have a refractive power. For example, the second lens may have a negative refractive power. The second lens may have a concave shape on one surface. For example, the second lens may have 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. The second lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the second lens may be formed of a plastic material or glass. The second lens may be configured to have a greater refractive index than the first lens. For example, the refractive index of the second lens may be greater than 1.6. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be 20 or greater. As a specific example, the Abbe number of the second lens may be greater than 20 and less than 30.

[0099] The third lens may have a refractive power. For example, the third lens may have a positive refractive power. The third lens may have a convex shape on one surface. For example, the third lens may have a convex object side surface. The third lens may include a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the third lens may be formed of a plastic material. The third lens may be configured to have a lower refractive index than the second lens. For example, the refractive index of the third lens may be 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 50. As a specific example, the Abbe number of the third lens may be greater than 50 and less than 60.

[0100] The fourth lens may have a refractive power. For example, the fourth lens may have a negative refractive power. The fourth lens may have a concave shape on one surface. For example, the fourth lens may have a concave object side surface. The fourth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the fourth lens may be formed of a plastic material. The fourth lens may be configured to have a lower refractive index than the second lens. As an example, the refractive index of the fourth lens may be less than 1.6. The fourth lens may have a predetermined Abbe number. For example, the Abbe number of the fourth lens may be greater than 50. As a specific example, the Abbe number of the fourth lens may be greater than 50 and less than 60.

[0101] The fifth lens may have a refractive power. For example, the fifth lens may have a positive refractive power. The fifth lens may have a convex shape on one surface. For example, the fifth lens may have a convex image side surface. The fifth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the fifth lens may be formed of a plastic material. The fifth lens may be configured to have a refractive index greater than that of the fourth lens. For example, the refractive index of the fifth lens may be greater than 1.6. The fifth lens may have a predetermined Abbe number. For example, the Abbe number of the fifth lens may be greater than 20. As a specific example, the Abbe number of the fifth lens may be greater than 20 and less than 30.

[0102] The sixth lens may have a refractive power. For example, the sixth lens may have a negative refractive power. The sixth lens may have a concave shape on one surface. As an example, the sixth lens may have a concave object side surface. As another example, the sixth lens may have a concave image side surface. The sixth lens may include a spherical surface or an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. The sixth lens may have an inflection point. For example, the inflection point may be formed on the image side surface of the sixth lens. The sixth lens may be formed of a material having a high light transmittance and excellent processing performance. For example, the sixth lens may be formed of a plastic material. The sixth lens may be configured to have a predetermined refractive index. As an example, the refractive index of the sixth lens may be less than 1.6. The sixth lens may have a predetermined Abbe number. For example, the Abbe number of the sixth lens may be greater than 50. As a specific example, the Abbe number of the sixth lens may be greater than 50 and less than 60.

[0103] The seventh lens may have a refractive power. For example, the seventh lens may have a negative refractive power. The seventh lens may have a convex shape on one surface. As an example, the seventh lens may have a convex object side surface. The seventh lens may include a spherical surface or an aspherical surface. For example, both surfaces of the seventh lens may be aspherical. The seventh lens may have an inflection point. For example, the inflection point may be formed on the image side surface of the seventh lens. The seventh lens may be formed of a material having a high light transmittance and excellent processing properties. For example, the seventh lens may be formed of a plastic material. The seventh lens may be configured to have a predetermined refractive index. As an example, the refractive index of the seventh lens may be less than 1.6. The seventh lens may have a predetermined Abbe number. For example, the Abbe number of the seventh lens may be greater than 50. As a specific example, the Abbe number of the seventh lens may be greater than 50 and less than 60.

[0104] As described above, the first to seventh lenses may include a spherical surface or an aspherical surface. When the first to seventh lenses include an aspherical surface, the aspherical surface of the corresponding lens may be represented by Equation 1 below.

[0105] Equation 1:

[0106]

[0107] In Equation 1, c is the inverse of the radius of curvature of the corresponding lens, k is the conic constant, r is the distance from any point on the aspherical surface to the optical axis, A to H, J and L to P are aspherical surface constants, and Z (or SAG) is the height from a certain point on the aspherical surface to the vertex of the corresponding aspherical surface in the optical axis direction.

[0108] The imaging lens system according to the above embodiment or the above form may further include a filter. The filter may be disposed between the last lens (the sixth lens or the seventh lens) and the imaging surface. The filter may be configured to block light of a specific wavelength. For reference, the filter described in one or more embodiments is configured to block infrared rays, but the wavelength of light blocked by the filter is not limited to infrared rays.

[0109] Hereinafter, specific embodiments will be described in detail based on the attached illustrative drawings.

[0110] First, refer to Figure 1 and Figure 2 An exemplary imaging lens system according to the first embodiment is described.

[0111] The exemplary imaging lens system 100 may include a plurality of lens groups. In an example, the exemplary imaging lens system 100 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. In a non-limiting example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0112] The first lens group LG1 may be composed of a first lens 110, a second lens 120, and a third lens 130. The first lens 110 may have positive refractive power, and may have a convex object-side surface and a convex 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.

[0113] The second lens group LG2 may be composed of a fourth lens 140, a fifth lens 150, and a sixth lens 160. The fourth lens 140 may have negative refractive power, and may have a concave object-side surface and a convex image-side surface. The fifth lens 150 may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. The sixth lens 160 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface.

[0114] In an example, the second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 100 according to the first embodiment can realize automatic focus adjustment (AF) and focus magnification adjustment (zoom) of the camera module by moving the second lens group LG2.

[0115] In addition to the first lens 110 to the sixth lens 160, the exemplary imaging lens system 100 may further include other lens elements. For example, the imaging lens system 100 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 160 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 110 to the sixth lens 160 forms an image. In an example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0116] The exemplary imaging lens system 100 according to the first embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 100 can generally capture images of objects located at a long distance. As another example, the exemplary imaging lens system 100 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0117] Figure 2 Aberration characteristics of an exemplary imaging lens system 100 according to the first embodiment are shown. Tables 1 and 2 below show lens characteristics and aspherical values ​​of the imaging lens system 100 according to the first embodiment.

[0118] Table 1

[0119]

[0120]

[0121] Table 2

[0122]

[0123]

[0124] Reference Figure 3 and Figure 4 An exemplary imaging lens system according to the second embodiment is described.

[0125] The exemplary imaging lens system 200 may include a plurality of lens groups. For example, the exemplary imaging lens system 200 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. For example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0126] The first lens group LG1 may include a first lens 210, a second lens 220, and a third lens 230. The first lens 210 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The second lens 220 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The third lens 230 may have positive refractive power and may have a convex object-side surface and a convex image-side surface.

[0127] The second lens group LG2 may include a fourth lens 240, a fifth lens 250, and a sixth lens 260. The fourth lens 240 may have negative refractive power, and may have a concave object-side surface and a convex image-side surface. The fifth lens 250 may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. The sixth lens 260 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface.

[0128] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the imaging lens system 200 according to the second embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0129] In addition to the first lens 210 to the sixth lens 260, the exemplary imaging lens system 200 may further include other lens elements. For example, the exemplary imaging lens system 200 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 260 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 210 to the sixth lens 260 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0130] The exemplary imaging lens system 200 according to the second embodiment can capture images of both near objects and distant objects. For example, the exemplary imaging lens system 200 can generally capture images of objects located at a long distance. As another example, the exemplary imaging lens system 200 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0131] Figure 4 Aberration characteristics of an exemplary imaging lens system 200 according to the second embodiment are shown. Tables 3 and 4 below show lens characteristics and aspherical values ​​of the imaging lens system 200 according to the present embodiment.

[0132] Table 3

[0133]

[0134]

[0135] Table 4

[0136]

[0137]

[0138] Reference Figure 5 and Figure 6 An exemplary imaging lens system according to the third embodiment is described.

[0139] The exemplary imaging lens system 300 may include a plurality of lens groups. For example, the exemplary imaging lens system 300 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. For example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0140] The first lens group LG1 may include a first lens 310, a second lens 320, and a third lens 330. The first lens 310 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The second lens 320 may have negative refractive power and may have a concave 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.

[0141] The second lens group LG2 may include a fourth lens 340, a fifth lens 350, and a sixth lens 360. 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 concave object-side surface and a convex image-side surface. The sixth lens 360 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface.

[0142] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 300 according to the third embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0143] In addition to the first lens 310 to the sixth lens 360, the exemplary imaging lens system 300 may further include other lens elements. For example, the exemplary imaging lens system 300 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 360 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 310 to the sixth lens 360 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0144] The exemplary imaging lens system 300 according to the third embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 300 can generally capture images of objects located at a long distance. As another example, the imaging lens system 300 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0145] Figure 6 Aberration characteristics of the exemplary imaging lens system 300 according to the third embodiment are shown. Tables 5 and 6 below show lens characteristics and aspherical values ​​of the exemplary imaging lens system 300 according to the third embodiment.

[0146] Table 5

[0147] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 4.2128 2.240 1.537 55.7 3.32 S2 -13.3365 0.234 3.16 S3 Second lens -30.9871 0.500 1.619 25.9 2.94 S4 5.2515 0.567 2.58 S5 The third lens 6.6395 1.429 1.537 55.7 2.54 S6 -7.9019 0.550 2.47 S7 infinity AF 2.03 S8 The fourth lens -4.9659 0.324 1.546 56.0 1.86 S9 15.6761 0.794 1.61 S10 Fifth lens -13.3241 0.440 1.644 23.5 1.52 S11 -8.6038 1.709 1.61 S12 The sixth lens -20.3030 0.735 1.546 56.0 2.22 S13 25.3242 1.012 2.61 S14 infinity -AF 3.54 S15 infinity 0.000 3.34 S16 Optical Filters infinity 0.210 1.518 64.2 3.34 S17 infinity 1.378 3.40 S18 Imaging surface -0.002

[0148] Table 6

[0149]

[0150]

[0151] Reference Figure 7 and Figure 8 An exemplary imaging lens system according to a fourth embodiment is described.

[0152] The exemplary imaging lens system 400 may include a plurality of lens groups. For example, the exemplary imaging lens system 400 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. In a non-limiting example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0153] The first lens group LG1 may include a first lens 410, a second lens 420, and a third lens 430. The first lens 410 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The second lens 420 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The third lens 430 may have positive refractive power and may have a convex object-side surface and a convex image-side surface.

[0154] The second lens group LG2 may include a fourth lens 440, a fifth lens 450, and a sixth lens 460. The fourth lens 440 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens 450 may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. The sixth lens 460 may have negative refractive power, and may have a convex object-side surface and a concave image-side surface.

[0155] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 400 according to the fourth embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0156] In addition to the first lens 410 to the sixth lens 460, the exemplary imaging lens system 400 may further include other lens elements. For example, the exemplary imaging lens system 400 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 460 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 410 to the sixth lens 460 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0157] The exemplary imaging lens system 400 according to the fourth embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 400 can generally image objects located at a long distance. As another example, the imaging lens system 400 can change the position of the second lens group LG2 to capture an image of an object located at a relatively short distance (e.g., 100 mm).

[0158] Figure 8 Aberration characteristics of an exemplary imaging lens system 400 according to the fourth embodiment are shown. Tables 7 and 8 show lens characteristics and aspherical values ​​of an exemplary imaging lens system 400 according to the fourth embodiment.

[0159] Table 7

[0160] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 4.2823 2.353 1.537 55.7 3.32 S2 -12.0672 0.100 3.22 S3 Second lens -32.2914 0.607 1.619 25.9 3.02 S4 7.3519 0.709 2.64 S5 The third lens 9.9337 0.900 1.537 55.7 2.54 S6 -9.8909 0.550 2.45 S7 infinity AF 2.05 S8 The fourth lens -4.0214 0.309 1.570 37.4 1.93 S9 48.2307 0.757 1.69 S10 Fifth lens -14.2932 0.631 1.677 19.2 1.57 S11 -7.9058 2.384 1.60 S12 The sixth lens 21.7620 0.489 1.546 56.0 2.38 S13 6.8488 1.346 2.67 S14 infinity -AF 3.64 S15 infinity 0.000 3.41 S16 Optical Filters infinity 0.210 1.518 64.2 3.41 S17 infinity 0.784 3.47 S18 Imaging surface -0.011

[0161] Table 8

[0162]

[0163]

[0164] Reference Fig. 9 and Fig.10 An exemplary imaging lens system according to a fifth embodiment is described.

[0165] The exemplary imaging lens system 500 may include a plurality of lens groups. For example, the imaging lens system 500 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. In an example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0166] The first lens group LG1 may include a first lens 510, a second lens 520, and a third lens 530. The first lens 510 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The second lens 520 may have negative refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 530 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface.

[0167] The second lens group LG2 may include a fourth lens 540, a fifth lens 550, and a sixth lens 560. The fourth lens 540 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens 550 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The sixth lens 560 may have negative refractive power, and may have a convex object-side surface and a concave image-side surface.

[0168] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 500 according to the fifth embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0169] In addition to the first lens 510 to the sixth lens 560, the exemplary imaging lens system 500 may further include other lens elements. For example, the imaging lens system 500 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the sixth lens 560 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 510 to the sixth lens 560 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0170] The exemplary imaging lens system 500 according to the fifth embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 500 can generally capture images of objects located at a long distance. As another example, the imaging lens system 500 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0171] Fig.10 Aberration characteristics of an exemplary imaging lens system 500 according to the fifth embodiment are shown. Tables 9 and 10 below show lens characteristics and aspherical values ​​of an exemplary imaging lens system 500 according to the fifth embodiment.

[0172] Table 9

[0173] Face number part Radius of curvature Thickness / distance Refractive Index Abbe number Effective radius S1 First lens 4.3580 2.315 1.537 55.7 3.32 S2 -12.6830 0.314 3.26 S3 Second lens 522.0074 0.300 1.644 23.5 2.89 S4 5.9997 0.773 2.61 S5 The third lens 12.2955 0.968 1.546 56.0 2.57 S6 -7.1954 0.450 2.58 S7 infinity AF 2.11 S8 The fourth lens -4.1141 0.315 1.570 37.4 1.99 S9 16.5678 0.621 1.70 S10 Fifth lens 48.3769 0.594 1.677 19.2 1.68 S11 -13.9168 2.394 1.71 S12 The sixth lens 18.1715 0.476 1.546 56.0 2.42 S13 6.1159 1.590 2.73 S14 infinity -AF 3.78 S15 infinity 0.000 3.54 S16 Optical Filters infinity 0.210 1.518 64.2 3.54 S17 infinity 0.795 3.59 S18 Imaging surface 0.005

[0174] Table 10

[0175]

[0176]

[0177] Reference Fig.11 and Fig.12 An exemplary imaging lens system according to the sixth embodiment is described.

[0178] The exemplary imaging lens system 600 may include a plurality of lens groups. For example, the imaging lens system 600 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. For example, the first lens group LG1 and the second lens group LG2 may each be composed of three lenses.

[0179] The first lens group LG1 may include a first lens 610, a second lens 620, and a third lens 630. The first lens 610 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The second lens 620 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 630 may have positive refractive power and may have a convex object-side surface and a convex image-side surface.

[0180] The second lens group LG2 may include a fourth lens 640, a fifth lens 650, and a sixth lens 660. The fourth lens 640 may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens 650 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The sixth lens 660 may have negative refractive power, and may have a convex object-side surface and a concave image-side surface.

[0181] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 600 according to the sixth embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0182] The exemplary imaging lens system 600 according to the sixth embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 600 can generally capture images of objects located at a long distance. As another example, the imaging lens system 600 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0183] Fig.12 Aberration characteristics of an exemplary imaging lens system 600 according to the sixth embodiment are shown. Tables 11 and 12 below show lens characteristics and aspherical values ​​of an exemplary imaging lens system 600 according to the sixth embodiment.

[0184] Table 11

[0185]

[0186]

[0187] Table 12

[0188]

[0189]

[0190] Reference Fig.13 and Fig.14 An exemplary imaging lens system according to the seventh embodiment is described.

[0191] The exemplary imaging lens system 700 may include a plurality of lens groups. For example, the imaging lens system 700 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. For example, the first lens group LG1 may be composed of three lenses, and the second lens group LG2 may be composed of four lenses.

[0192] The first lens group LG1 may be composed of a first lens 710, a second lens 720, and a third lens 730. The first lens 710 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The second lens 720 may have negative refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens 730 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface.

[0193] The second lens group LG2 may be composed of a fourth lens 740, a fifth lens 750, a sixth lens 760, and a seventh lens 770. The fourth lens 740 may have a negative refractive power and may have a convex object side surface and a concave image side surface. The fifth lens 750 may have a positive refractive power and may have a concave object side surface and a convex image side surface. The sixth lens 760 may have a negative refractive power and may have a concave object side surface and a convex image side surface. The seventh lens 770 may have a negative refractive power and may have a convex object side surface and a concave image side surface.

[0194] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the exemplary imaging lens system 700 according to the seventh embodiment can achieve automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0195] In addition to the first lens 710 to the seventh lens 770, the exemplary imaging lens system 700 may further include other lens elements. For example, the imaging lens system 700 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the seventh lens 770 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 710 to the seventh lens 770 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0196] The exemplary imaging lens system 700 according to the seventh embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 700 can generally image objects located at a long distance. As another example, the exemplary imaging lens system 700 can change the position of the second lens group LG2 to capture an image of an object located at a relatively short distance (e.g., 100 mm).

[0197] Fig.13 Aberration characteristics of an exemplary imaging lens system 700 according to the seventh embodiment are shown. Table 13 and Table 14 show lens characteristics and aspherical surface values ​​of the exemplary imaging lens system 700 according to the seventh embodiment.

[0198] Table 13

[0199]

[0200]

[0201] Table 14

[0202]

[0203]

[0204] Reference Fig.15 and Fig.16 An exemplary imaging lens system according to an eighth embodiment is described.

[0205] The exemplary imaging lens system 800 may include a plurality of lens groups. For example, the imaging lens system 800 may include a first lens group LG1 and a second lens group LG2. The first lens group LG1 and the second lens group LG2 may be arranged sequentially from the object side toward the imaging surface. The first lens group LG1 and the second lens group LG2 may include one or more lenses. For example, the first lens group LG1 may be composed of three lenses, and the second lens group LG2 may be composed of four lenses.

[0206] The first lens group LG1 may be composed of a first lens 810, a second lens 820, and a third lens 830. The first lens 810 may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The second lens 820 may have negative refractive power, and may have a convex 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.

[0207] The second lens group LG2 may be composed of a fourth lens 840, a fifth lens 850, a sixth lens 860, and a seventh lens 870. The fourth lens 840 may have a negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 850 may have a positive refractive power and may have a concave object-side surface and a convex image-side surface. The sixth lens 860 may have a negative refractive power and may have a concave object-side surface and a convex image-side surface. The seventh lens 870 may have a negative refractive power and may have a convex object-side surface and a concave image-side surface.

[0208] The second lens group LG2 may be configured to be movable in the optical axis direction. Therefore, the imaging lens system 800 according to the eighth embodiment can realize automatic focus adjustment (AF) and focus magnification adjustment (zooming) of the camera module by moving the second lens group LG2.

[0209] In addition to the first lens 810 to the seventh lens 870, the exemplary imaging lens system 800 may further include other lens elements. For example, the imaging lens system 800 may further include a filter IF and an imaging surface IP. The filter IF may be disposed between the seventh lens 870 and the imaging surface IP. The imaging surface IP may be formed in a position where light incident from the first lens 810 to the seventh lens 870 forms an image. For example, the imaging surface IP may be formed on one surface of the image sensor IS of the camera module, or on a lens element disposed inside the image sensor IS.

[0210] The exemplary imaging lens system 800 according to the eighth embodiment can capture images of both near objects and distant objects. As an example, the imaging lens system 800 can generally capture images of objects located at a long distance. As another example, the exemplary imaging lens system 800 can change the position of the second lens group LG2 to capture images of objects located at a relatively short distance (e.g., 100 mm).

[0211] Fig.15 Aberration characteristics of an exemplary imaging lens system 800 according to the eighth embodiment are shown. Table 15 and Table 16 show lens characteristics and aspherical surface values ​​of the exemplary imaging lens system 800 according to the eighth embodiment.

[0212] Table 15

[0213]

[0214]

[0215] Table 16

[0216]

[0217]

[0218] Table 17 below shows characteristic values ​​of exemplary imaging lens systems according to the first to eighth embodiments.

[0219] Table 17

[0220]

[0221]

[0222] According to the examples of the first to eighth embodiments, the imaging lens system according to one or more embodiments may have specific lens characteristics. For example, the focal length of the first lens is determined within the range of 5.0 mm to 8.0 mm, the focal length of the second lens is determined within the range of -12.0 mm to -6.0 mm, the focal length of the third lens is determined within the range of 6.0 mm to 10.0 mm, the focal length of the fourth lens is determined within the range of -10.0 mm to -4.0 mm, the focal length of the fifth lens is determined within the range of 10.0 mm to 40.0 mm, and the focal length of the seventh lens is determined within the range of -24.0 mm to -18.0 mm. The focal length of the sixth lens may vary according to the number of lenses constituting the imaging lens system. For example, in an imaging lens system consisting of six lenses, the focal length of the sixth lens is determined within the range of -24 mm to -8.0 mm, and in an imaging lens system consisting of seven lenses, the focal length of the sixth lens is determined within the range of -60 mm to -40.0 mm.

[0223] Table 18 to Table 21 below show conditional expression values ​​of exemplary imaging lens systems according to the first to eighth embodiments.

[0224] Table 18

[0225]

[0226]

[0227] Table 19

[0228] First embodiment Second embodiment Third embodiment Fourth embodiment fG1F / fG2F -0.689 -0.671 -0.909 -0.954 fG1F / fG1R 0.782 0.790 0.897 0.661 fG2F / fG2R 0.656 0.933 0.335 0.351 fG1R / fG2F -0.882 -0.850 -1.013 -1.444 fG1R / fG2R -0.579 -0.793 -0.339 -0.507 Fifth embodiment Sixth Embodiment Seventh embodiment Eighth Embodiment fG1F / fG2F -1.103 -1.107 -1.079 -1.074 fG1F / fG1R 0.750 0.750 0.886 0.880 fG2F / fG2R 0.336 0.303 0.309 0.326 fG1R / fG2F -1.472 -1.477 -1.218 -1.220 fG1R / fG2R -0.494 -0.447 -0.377 -0.398

[0229] Table 20

[0230]

[0231]

[0232] Table 21

[0233] First embodiment Second embodiment Third embodiment Fourth embodiment R1 / R5 0.493 0.570 0.635 0.431 R1 / R6 -0.521 -0.506 -0.533 -0.433 R1 / R7 -1.119 -1.256 -0.848 -1.065 R2 / R5 -1.474 -1.363 -2.009 -1.215 R2 / R6 1.557 1.210 1.688 1.220 R5 / R7 -2.269 -2.203 -1.337 -2.470 R6 / R7 2.148 2.481 1.591 2.460 Fifth embodiment Sixth Embodiment Seventh embodiment Eighth Embodiment R1 / R5 0.354 0.367 0.568 0.560 R1 / R6 -0.606 -0.593 -0.369 -0.361 R1 / R7 -1.059 -1.049 -0.988 -0.971 R2 / R5 -1.032 -1.069 -7.897 -9.763 R2 / R6 1.763 1.726 5.133 6.283 R5 / R7 -2.989 -2.855 -1.738 -1.732 R6 / R7 1.749 1.768 2.674 2.691

[0234] The exemplary imaging lens system according to one or more embodiments may be changed into other forms.As an example, the imaging lens system according to one or more embodiments may include one or more optical path conversion devices.

[0235] As a specific example, the exemplary imaging lens systems 100, 200, 300, 400, 500, 600, 700, and 800 according to the first to eighth embodiments may also include: Fig.17 The optical path conversion device P shown in . In the example, the optical path conversion device P can be in the form of a prism. However, the type of the optical path conversion device P is not limited to a prism. As an example, the optical path conversion device P can be configured in the form of a reflector. The optical path conversion device P can be arranged on the object side of the frontmost lens. However, the placement position of the optical path conversion device P is not limited to the object side of the frontmost lens. As an example, the optical path conversion device P can be arranged on the image side of the last lens. As another example, the optical path conversion device P can be arranged on the object side of the frontmost lens and on the image side of the last lens, respectively.

[0236] Reference Fig.18 An electronic device according to one or more embodiments is described.

[0237] An exemplary electronic device 10 according to one or more embodiments may include a camera module.

[0238] As an example, the electronic device 10 may be a portable terminal including the camera modules 20 and 30. However, the form of the electronic device 10 is not limited to the portable terminal. For example, as an example only, the electronic device 10 may include any portable electronic device such as a laptop computer or a tablet personal computer (PC). The electronic device 10 according to one or more embodiments may include one or more of the imaging lens systems 100, 200, 300, 400, 500, 600, 700, and 800 according to the first to eighth embodiments. As an example, the imaging lens systems 100, 200, 300, 400, 500, 600, 700, and 800 according to the first to eighth embodiments are provided among the first camera module 20 and the second camera module 30 mounted on one side of the electronic device 10.

[0239] Although the present disclosure includes specific examples, it will be apparent after understanding the disclosure of the present application 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 system, architecture, device, or circuit are combined in a different manner and / or replaced or supplemented by other components or their equivalents, appropriate results can still be achieved.

[0240] Therefore, the scope of the present disclosure includes the claims and their equivalents in addition to the above disclosure and all the accompanying drawings, that is, all modifications within the scope of the claims and their equivalents should be construed as being included in the present disclosure.

Claims

1. Imaging lens system, including: A first lens group including one or more lenses; as well as A second lens group includes one or more lenses and is configured to be movable in the optical axis direction, wherein at least one lens in the first lens group or the second lens group comprises an aspherical surface, wherein the first lens group and the second lens group are arranged sequentially from the object side toward the imaging surface, and Wherein, the imaging lens system satisfies the following conditional expression: TTL / (IMG HT×2)<0.850, Wherein, TTL is the distance from the object side surface of the frontmost lens arranged closest to the object to the imaging plane, and IMG HT is the height of the imaging plane.

2. The imaging lens system according to claim 1, wherein: The frontmost lens has a convex image-side surface.

3. The imaging lens system according to claim 1, wherein: A rear lens in the first lens group that is disposed closest to the second lens group has a convex image-side surface.

4. The imaging lens system according to claim 1, wherein: A front lens in the second lens group, which is disposed closest to the first lens group, has a concave object-side surface.

5. The imaging lens system according to claim 1, wherein: The last lens disposed closest to the imaging plane has a concave image-side surface.

6. The imaging lens system of claim 1, wherein: fG1 / fG1F<1.10, Wherein, fG1 is the focal length of the first lens group, and fG1F is the focal length of the front lens.

7. The imaging lens system of claim 1, wherein: fG2 / fG2F<1.0, Wherein, fG2 is the focal length of the second lens group, and fG2F is the focal length of the lens in the second lens group that is closest to the object.

8. The imaging lens system of claim 1, wherein: fG1 / f<0.550, Wherein, fG1 is the focal length of the first lens group, and f is the focal length of the imaging lens system.

9. Imaging lens system, comprising: A first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens are sequentially arranged from the object side toward the imaging surface, wherein at least one of the first to sixth lenses includes an aspherical surface, wherein the first lens has a convex image side surface, and Among them, -1.2 <f1 / f4<-0.40, Wherein, f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens.

10. The imaging lens system according to claim 9, wherein: The first lens has a convex object-side surface.

11. The imaging lens system according to claim 9, wherein: The second lens has a concave image-side surface.

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

13. The imaging lens system according to claim 9, wherein: The fourth lens has a concave object-side surface.

14. The imaging lens system according to claim 9, wherein: The fifth lens has a convex image-side surface.

15. The imaging lens system according to claim 9, wherein: The imaging lens system also includes a seventh lens disposed on the image side of the sixth lens.

16. The imaging lens system according to claim 15, wherein: The seventh lens has a concave image-side surface.

17. Electronic equipment, including: An imaging lens system comprising: A first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens are sequentially arranged from the object side toward the imaging surface, wherein at least one of the first to sixth lenses includes an aspherical surface, Wherein, the imaging lens system satisfies the following conditional expression: TTL / (IMG HT×2)<0.850, Wherein, TTL is the distance from the object side surface of the frontmost lens arranged closest to the object to the imaging plane, and IMG HT is the height of the imaging plane.

18. The electronic device according to claim 17, wherein: The imaging lens system also includes a seventh lens disposed on the image side of the sixth lens.

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