CN114994870A - Imaging lens system, camera module and portable terminal - Google Patents

Imaging lens system, camera module and portable terminal Download PDF

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Publication number
CN114994870A
CN114994870A CN202210784586.XA CN202210784586A CN114994870A CN 114994870 A CN114994870 A CN 114994870A CN 202210784586 A CN202210784586 A CN 202210784586A CN 114994870 A CN114994870 A CN 114994870A
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China
Prior art keywords
lens
imaging
lens system
image
refractive power
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CN202210784586.XA
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Chinese (zh)
Inventor
申吉洙
赵镛主
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Samsung Electro Mechanics Co Ltd
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Samsung Electro Mechanics Co Ltd
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Priority claimed from KR1020210129628A external-priority patent/KR20230046530A/en
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Publication of CN114994870A publication Critical patent/CN114994870A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

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

Description

Imaging lens system, camera module and portable terminal
Cross Reference to Related Applications
This application claims the benefit of priority from korean patent application No. 10-2021-0129628, filed in korean intellectual property office at 30.9.2021, the entire disclosure of which is incorporated herein by reference for all purposes.
Technical Field
The present disclosure relates to an imaging lens system, and more particularly, to an imaging lens system mountable in a portable electronic device.
Background
The portable electronic device includes a camera module for capturing images or video. For example, the camera module may be installed in a mobile phone, a notebook computer, a game machine, and the like.
The resolution of the camera module and the imaging lens system may be proportional to the size of the sensor and the imaging plane. For example, to realize a high-resolution camera module and an imaging lens system, a sensor and an imaging plane having a considerably large size are required. However, since the size (or length) of the camera module and the imaging lens system increases in proportion to the size of the sensor and the imaging plane, it may be difficult to mount the high resolution camera module and the imaging lens system in a thin electronic device such as a smart phone.
The above information is presented merely as background information to aid in understanding the present disclosure. No determination is made as to whether any of the above is applicable as prior art with respect to the present disclosure, and no assertion is made.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In one general aspect, an imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order from an object side, wherein 0.15< BFL/TTL and 1.9mm < BFL <2.8 are satisfied, wherein BFL is a distance from an image side surface of the eighth lens to an imaging surface, and TTL is a distance from an object side surface of the first lens to the imaging surface.
ImgHT may be greater than or equal to 5.0mm and less than or equal to 9.0mm, where ImgHT is the height of the imaging plane.
T1/ImgHT may be greater than 0.1 and less than 0.2, where T1 is the thickness of the first lens at the center of the optical axis.
f1/f can be greater than 0 and less than 2.0, where f1 is the focal length of the first lens and f is the focal length of the imaging lens system.
f2/f can be greater than-3.5 and less than 0, where f2 is the focal length of the second lens.
TTL/f can be greater than 0.8 and less than 1.2.
(TTL-BFL)/2ImgHT may be less than 0.65, where 2ImgHT is the diagonal length of the imaging plane.
f7/f may be greater than 0 and less than 0.8, where f7 is the focal length of the seventh lens.
SUMT/BFL may be greater than 1.3 and less than 2.8, where SUMT is a sum of thicknesses of the first to eighth lenses at a center of the optical axis.
The camera module may include an imaging lens system and an image sensor including an imaging surface disposed at an imaging plane of the imaging lens system, wherein the image sensor may convert an image of an object formed on an effective imaging area of the imaging surface by a lens of the imaging lens system into an electric signal.
The portable terminal may include a housing, and the camera module may be disposed in the housing.
In another general aspect, an imaging lens system includes a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a negative refractive power, wherein 2.0< DL1LP/BFL <5.4 is satisfied, wherein DL1LP is a distance from an object-side surface of the first lens to an image-side surface of the last lens, the last lens is a lens closest to an imaging surface, and BFL is a distance from the image-side surface of the last lens to the imaging surface.
The fourth lens may have a negative refractive power.
The fifth lens may have a positive refractive power.
The fourth lens may have a concave image side surface.
The BFL/TTL can be greater than 0.15 and less than 0.40.
TTL/f can be greater than 1.0 and less than 1.3.
The camera module may include an imaging lens system, and an image sensor having an imaging surface disposed at an imaging plane of the imaging lens system, wherein the image sensor may convert an image of an object formed on an effective imaging area of the imaging surface by a lens of the imaging lens system into an electrical signal, and wherein the imaging lens system may move toward the image sensor, and (BFLx-BFLm)/BFLx may be greater than 0.6 and less than 0.8, wherein BFLx is a distance from an image side surface of a last lens closest to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is a distance from the image side surface of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.
In another general aspect, a camera module includes an imaging lens system including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in this order from an object side, wherein the imaging lens system is movable toward the image sensor and satisfies 0.6< (BFLx-BFLm)/BFLx <0.8, where BFLx is a distance from an image side surface of a last lens closest to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is a distance from the image side surface of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.
The imaging lens system may further include one or more additional lenses disposed on an image side of the sixth lens toward the image sensor, and wherein the BFL/TTL may be greater than 0.15 and the BFL may be greater than 1.9 mm.
The portable terminal may include a housing, a camera module disposed in the housing, and one or more other camera modules.
In another general aspect, a camera module includes a first barrel housing a second barrel, an imaging lens system disposed in the second barrel, and an image sensor disposed in the first barrel and including an imaging surface disposed at an imaging plane of the imaging lens system, wherein the second barrel is movable to at least partially protrude from the first barrel, wherein the imaging lens system includes seven or more lenses, and wherein 0.15< BFL/TTL and 1.9mm < BFL are satisfied. Where BFL is the distance from the image side surface of the last lens closest to the image sensor to the imaging plane, and TTL is the distance from the object side surface of the foremost lens farthest from the image sensor to the imaging plane.
The seven or more lenses may include at least a first lens having a positive refractive power, a second lens having a refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a negative refractive power, wherein the first to sixth lenses may be arranged in order from the object side.
Other features and aspects will be apparent from the following detailed description, the accompanying drawings, and the claims.
Drawings
Fig. 1 is a perspective view of a portable terminal equipped with a camera module according to one or more example embodiments.
Fig. 2 and 3 are sectional views of the portable terminal taken along line I-I' of fig. 1.
Fig. 4 and 5 are enlarged views of the imaging lens systems shown in fig. 2 and 3, respectively.
Fig. 6 is a configuration diagram of an imaging lens system according to the first exemplary embodiment.
Fig. 7 is an aberration curve of the imaging lens system shown in fig. 6.
Fig. 8 is a configuration diagram of an imaging lens system according to a second exemplary embodiment.
Fig. 9 is an aberration curve of the imaging lens system shown in fig. 8.
Fig. 10 is a configuration diagram of an imaging lens system according to a third exemplary embodiment.
Fig. 11 is an aberration curve of the imaging lens system shown in fig. 10.
Fig. 12 is a configuration diagram of an imaging lens system according to a fourth exemplary embodiment.
Fig. 13 is an aberration curve of the imaging lens system shown in fig. 12.
Fig. 14 is a configuration diagram of an imaging lens system according to a fifth exemplary embodiment.
Fig. 15 is an aberration curve of the imaging lens system shown in fig. 14.
Fig. 16 is a configuration diagram of an imaging lens system according to a sixth exemplary embodiment.
Fig. 17 is an aberration curve of the imaging lens system shown in fig. 16.
Fig. 18 is a configuration diagram of an imaging lens system according to a seventh exemplary embodiment.
Fig. 19 is an aberration curve of the imaging lens system shown in fig. 18.
Fig. 20 is a configuration diagram of an imaging lens system according to an eighth exemplary embodiment.
Fig. 21 is an aberration curve of the imaging lens system shown in fig. 20.
Fig. 22 is a configuration diagram of an imaging lens system according to a ninth exemplary embodiment.
Fig. 23 is an aberration curve of the imaging lens system shown in fig. 22.
Fig. 24 is a configuration diagram of an imaging lens system according to a tenth exemplary embodiment.
Fig. 25 is an aberration curve of the imaging lens system shown in fig. 24.
Like reference numerals refer to like elements throughout the drawings and detailed description. The figures may not be drawn to scale and the relative sizes, proportions and descriptions of elements in the figures may be exaggerated for clarity, illustration and convenience.
Detailed Description
Hereinafter, although example embodiments of the present disclosure are described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.
The following detailed description is provided to assist the reader in a thorough 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 to those skilled in the art upon reading this disclosure. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but may be changed as would be apparent upon understanding the present disclosure, except to the extent that operations must occur in a certain order. Moreover, descriptions of features known in the art may be omitted for greater clarity and conciseness.
The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and/or systems described herein that will be apparent after understanding the present disclosure.
In this document, it should be noted that the term "may" is used in relation to an example or embodiment, e.g., in relation to what an example or embodiment may include or implement, meaning that there is at least one example or embodiment that includes or implements such feature, and all examples and embodiments are not limited thereto.
Throughout the specification, when an element such as a layer, region or substrate is described as being "on," "connected to" or "coupled to" another element, it may be directly on, "connected to" or "coupled to" the other element or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no other elements intervening therebetween.
As used herein, the term "and/or" includes any one of the associated listed items as well as any combination of any two or more; likewise, "at least one of … …" includes any one of the associated listed items as well as any combination of any two or more.
Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section referred to in an example can also be referred to as a second member, component, region, layer or section without departing from the teachings of the example described herein.
Spatially relative terms, such as "above," "upper," "lower," and the like, may be used herein for ease of description to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "upper" or "above" another element would then be "lower" or "below" the other element. Thus, the term "above" includes both an orientation of above and below, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The articles "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" mean the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.
The shapes of the illustrations as a result of manufacturing techniques and/or tolerances may vary. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacturing.
The features of the examples described herein may be combined in various ways, as will be apparent after having obtained an understanding of the present disclosure. Further, while the examples described herein have a variety of configurations, other configurations are possible, once an understanding of the present disclosure is obtained.
Example embodiments described herein provide an imaging lens system configured to be mounted in a portable electronic device.
In the present disclosure, the first lens means a lens closest to an object (or object), and the sixth lens, the seventh lens, or the eighth lens means a lens closest to an imaging plane (or image sensor) depending on whether there are six lenses, seven lenses, or eight lenses in total in the lens system, respectively. In the present disclosure, all of the radius of curvature, thickness, TTL (distance from the object side surface of the first lens to the imaging surface), 2ImgHT (diagonal length of the imaging surface), ImgHT (image height or 1/2 for 2 ImgHT), and focal length are expressed in millimeters (mm).
The thickness of the lenses, the distance between the lenses, and TTL are distances along the optical axes of the lenses. Further, in the description of the lens shape, the convex shape of one surface means that the paraxial region of the corresponding surface is convex, and the concave shape of one surface means that the paraxial region of the corresponding surface is concave. Therefore, even if it is described that one surface of the lens has a convex shape, the edge portion of the lens may be concave. Similarly, even if one surface of the lens is described as having a concave shape, the edge portion of the lens may be convex.
The optical imaging system including the imaging lens system may include other elements in addition to the first to sixth lenses, the seventh lens, or the eighth lens.
The optical imaging system may further include at least one stop disposed before the first lens, or between any two adjacent lenses of the first to sixth lenses, the seventh lens, or the eighth lens, or between the sixth lens, the seventh lens, or the eighth lens and the imaging surface. The optical imaging system may comprise two or more diaphragms arranged at different positions.
The optical imaging system may further include an image sensor having an imaging surface disposed at an imaging plane of the imaging lens system. The image sensor converts an image of an object formed on an effective imaging area of an imaging surface by a lens of the imaging lens system into an electric signal.
The optical imaging system may further include an infrared blocking filter, hereinafter referred to as a filter, for blocking infrared light. The filter may be disposed between the sixth lens, the seventh lens, or the eighth lens and the imaging surface.
The optical imaging system may further include at least one reflecting member having a reflecting surface that changes a direction of an optical path in the optical imaging system. For example, the reflecting member may be a prism or a mirror.
For example, the reflection member may be disposed in an optical path on the object side of the first lens, between any two of the second to sixth lenses, the seventh lens, or the eighth lens, or on the image side of the sixth lens, the seventh lens, or the eighth lens.
For example, the optical imaging system may further include a first reflecting member disposed in an optical path between the object side of the optical imaging system and the object side surface of the first lens. Accordingly, the first lens may be a lens disposed closest to the first reflective member among the first to sixth lenses, the seventh lens, or the eighth lens.
Further, the optical imaging system may further include a second reflecting member disposed in an optical path between the image side surface of the sixth lens, the seventh lens, or the eighth lens and the imaging surface. Accordingly, the sixth lens, the seventh lens, or the eighth lens may be a lens disposed closest to the second reflective member among the first to sixth lenses, the seventh lens, or the eighth lens.
The imaging lens systems described herein may be configured to be mounted in a portable electronic device. For example, the imaging lens system may be installed in a smart phone, a notebook computer, an Augmented Reality (AR) device, a Virtual Reality (VR) device, a portable game machine, or the like. However, the scope of use and examples of the imaging lens system described in the present disclosure are not limited to the above-described electronic devices. For example, the imaging lens system can be applied to an electronic apparatus that provides a narrow installation space but requires high-resolution imaging.
An imaging lens system according to one or more example embodiments of the present disclosure may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order from the object side. However, the lenses constituting the imaging lens system are not limited to eight lenses. For example, the imaging lens system may include no more than six lenses or no more than seven lenses.
An imaging lens system according to an aspect may be configured such that a distance BFL from a last lens to an imaging plane is formed to have a significant size. For example, in the imaging lens system described in the present disclosure, a distance BFL from an image-side surface of the eighth lens as a last lens to an imaging surface may be greater than 1.9mm and less than 2.8 mm.
Further, the BFL may be configured to have a predetermined relationship with the length of the imaging lens system (distance from the object side surface of the first lens as the frontmost lens to the imaging surface: TTL). For example, BFL/TTL can be greater than 0.15.
An imaging lens system according to another aspect of the present disclosure may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order from the object side.
The imaging lens system according to another aspect may include a lens having a predetermined refractive power. For example, the imaging lens system according to the present exemplary embodiment may include a first lens having a positive refractive power and a third lens having a positive refractive power.
In the imaging lens system according to the aspect, a distance from the first lens to the eighth lens may be formed to have a considerably large size. For example, the distance D18 from the object-side surface of the first lens to the image-side surface of the eighth lens may be significantly greater than the distance BFL from the image-side surface of the eighth lens to the imaging surface. To elaborate, D18/BFL may be greater than 2.0 and less than 4.2.
An imaging lens system according to another aspect of the present disclosure may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, which are arranged in order from an object side. Further, one or more of the following conditional expressions may be satisfied.
25<V1-V2<45
-10<V1-V3<25
25<V1-V4<50
-10<V1-V5<25
0<f1/f<2.0
-3.5<f2/f<0
1.5<f3/f
-100<f4/f<300
f5/f<150
-10<f6/f<10
0<f7/f
f8/f<0
TTL/f<1.5
-1.0<f1/f2<0
-2.0<f2/f3<0
BFL/f<0.4
D12/f<0.3
TTL/2ImgHT<0.8
(TTL-BLF)/2ImgHT<0.65
0.15<BFL/TTL
In the above conditional expressions, V1 is an abbe number of the first lens, V2 is an abbe number of the second lens, V3 is an abbe number of the third lens, V4 is an abbe number of the fourth lens, V5 is an abbe number of the fifth lens, f is a focal length of the imaging lens system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f8 is a focal length of the eighth lens, TTL is a distance from an object-side surface of the first lens to an imaging surface, BFL is a distance from an image-side surface of the eighth lens to the imaging surface, D12 is a distance from an image-side surface of the first lens to an object-side surface of the second lens, and 2ImgHT is a length of a diagonal line of the imaging surface.
The imaging lens system may satisfy some of the above conditional expressions in a form as further defined below.
1.5<f3/f<50
10<f5/f<150
0<f7/f<0.8
-1.0<f8/f<0
0.8<TTL/f<1.3
0.19<BFL/f<0.40
0<D12/f<0.3
0.6<TTL/2ImgHT<0.8
0.4<(TTL-BLF)/2ImgHT<0.62
0.15<BFL/TTL<0.4
An imaging lens system according to another aspect of the present disclosure may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order from an object side, and may satisfy one or more of the following conditional expressions.
5.0mm≤ImgHT≤9.0mm
0.1<T1/ImgHT<0.2
0.2<BFL/ImgHT<0.5
2.0<DL1LP/BFL<4.2
0.6<EPD/ImgHT<0.8
1.3<EPD/BFL<3.2
1.1<SUMT/SUMD<2.3
1.3<SUMT/BFL<3.0
0.7<SUMD/BFL<2.6
In the above conditional expressions, ImgHT is an image height (height of an imaging plane), T1 is a thickness of the first lens at the center of the optical axis, DL1LP is a distance from an object side surface of the first lens to an image side surface of the last lens (a lens closest to the imaging plane), EPD is a diameter of an entrance pupil, SUMT is a sum of thicknesses of the first lens to the eighth lens, and SUMD is a sum of air gaps between the lenses (i.e., an air gap between the first lens and the second lens, an air gap between the second lens and the third lens, an air gap between the third lens and the fourth lens, an air gap between the fourth lens and the fifth lens, an air gap between the fifth lens and the sixth lens, an air gap between the sixth lens and the seventh lens, and an air gap between the seventh lens and the eighth lens). For reference, the air gap between lenses is the distance from the image-side surface of the lens disposed on the front side (object side) to the object-side surface of the lens disposed on the rear side (image side).
The imaging lens system may satisfy some of the above conditional expressions in a form as further defined below.
0.62<EPD/ImgHT<0.72
1.6<EPD/BFL<2.6
1.4<SUMT/SUMD<2.0
1.6<SUMT/BFL<2.4
1.0<SUMD/BFL<2.0
The imaging lens system according to the above aspect may include one or more lenses having the following characteristics. For example, the imaging lens system according to the first aspect may include one of the first to eighth lenses according to the following characteristics. As another example, the imaging lens system according to the second aspect may include two or more of the first lens to the eighth lens according to the following characteristics. However, the imaging lens system according to the above aspect does not necessarily include a lens according to the following characteristics.
Hereinafter, the characteristics of the first to eighth lenses are described.
The first lens has a refractive power. For example, the first lens may have a positive refractive power. The first lens includes a spherical surface or an aspherical surface. For example, both surfaces of the first lens may be aspherical. The first lens may be formed of a material having high light transmittance and excellent workability. For example, the first lens may be formed of a plastic material or a glass material. The first lens may be configured to have a predetermined refractive index. For example, the refractive index of the first lens may be less than 1.6. As an example, the refractive index of the first lens may be greater than 1.52 and less than 1.57. The first lens may have a predetermined abbe number. For example, the abbe number of the first lens may be less than 60. As an example, the abbe number of the first lens may be greater than 53 and less than 58.
The second lens has a refractive power. The second lens includes a spherical surface or an aspherical surface. For example, both surfaces of the second lens may be aspherical. The second lens may be formed of a material having high light transmittance and excellent workability. For example, the second lens may be formed of a plastic material or a glass material. The second lens may be configured to have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.6. As an example, the refractive index of the second lens may be greater than 1.63 and less than 1.69. The second lens may have a predetermined abbe number. For example, the abbe number of the second lens may be less than 30. As an example, the abbe number of the second lens may be greater than 18 and less than 24.
The third lens has a refractive power. For example, the third lens may have a positive refractive power. The third lens includes a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having high light transmittance and excellent workability. For example, the third lens may be formed of a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be less than 1.6. As an example, the refractive index of the third lens may be greater than 1.52 and less than 1.57. The third lens may have a predetermined abbe number. For example, the third lens may have an abbe number of less than 60. As an example, the abbe number of the third lens may be greater than 53 and less than 58.
The fourth lens has a refractive power. One side of the fourth lens may be concave. For example, the fourth lens may have a concave image side surface. The fourth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be formed of a material having high light transmittance and excellent workability. For example, the fourth lens may be formed of a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.6. As an example, the refractive index of the fourth lens may be greater than 1.60 and less than 1.69. The fourth lens may have a predetermined abbe number. For example, the abbe number of the fourth lens may be less than 30. As an example, the abbe number of the fourth lens may be greater than 20 and less than 27.
The fifth lens has refractive power. For example, the fifth lens may have a positive refractive power. The fifth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material having high light transmittance and excellent workability. For example, the fifth lens may be formed of a plastic material or a glass material. The fifth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fifth lens may be less than 1.6. As an example, the refractive index of the fifth lens may be greater than 1.52 and less than 1.57. The fifth lens may have a predetermined abbe number. For example, the abbe number of the fifth lens may be less than 60. For example, the abbe number of the fifth lens may be greater than 53 and less than 58.
The sixth lens has refractive power. For example, the sixth lens may have a negative refractive power. The sixth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. One surface or both surfaces of the sixth lens may have an inflection point. For example, inflection points may be formed on the object-side surface and the image-side surface of the sixth lens. Further, the concave shape and the convex shape may be formed together on one surface or both surfaces of the sixth lens. For example, an optical axis portion of the sixth lens may be convex on the object side surface, and a peripheral portion of the optical axis of the sixth lens may be concave on the object side surface. As another example, an optical axis portion of the sixth lens may be concave on the image side surface, and a peripheral portion of the optical axis of the sixth lens may be convex on the image side surface. The sixth lens may be formed of a material having high light transmittance and excellent workability. For example, the sixth lens may be formed of a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be less than 1.6. As an example, the refractive index of the sixth lens may be greater than 1.54 and less than 1.59. The sixth lens may have a predetermined abbe number. For example, the abbe number of the sixth lens may be less than 40. As an example, the abbe number of the sixth lens may be greater than 30 and less than 40.
The seventh lens has a refractive power. The seventh lens includes a spherical surface or an aspherical surface. For example, both surfaces of the seventh lens may be aspherical. Inflection points may be formed on one surface or both surfaces of the seventh lens. For example, inflection points may be formed on the object-side surface and the image-side surface of the seventh lens. Further, the concave shape and the convex shape may be formed together on one surface or both surfaces of the seventh lens. For example, an optical axis portion of the seventh lens may be convex on the object side surface, and a peripheral portion of the optical axis of the seventh lens may be concave on the object side surface. As another example, an optical axis portion of the seventh lens may be concave on the image side surface, and a peripheral portion of the optical axis of the seventh lens may be convex on the image side surface. The seventh lens may be formed of a material having high light transmittance and excellent workability. For example, the seventh lens may be formed of a plastic material or a glass material. The seventh lens may be configured to have a predetermined refractive index. For example, the refractive index of the seventh lens may be less than 1.6. As an example, the refractive index of the seventh lens may be greater than 1.52 and less than 1.57. The seventh lens may have a predetermined abbe number. For example, the abbe number of the seventh lens may be less than 60. As an example, the abbe number of the seventh lens may be greater than 53 and less than 58.
The eighth lens has refractive power. The eighth lens includes a spherical surface or an aspherical surface. For example, both surfaces of the eighth lens may be aspherical. An inflection point may be formed on one surface or both surfaces of the eighth lens. For example, inflection points may be formed on the object-side surface and the image-side surface of the eighth lens. Further, the concave shape and the convex shape may be formed together on one surface or both surfaces of the eighth lens. For example, an optical axis portion of the eighth lens may be convex on the object side surface, and a peripheral portion of the optical axis of the eighth lens may be concave on the object side surface. As another example, an optical axis portion of the eighth lens may be concave on the object side surface, and a peripheral portion of the optical axis of the eighth lens may be convex on the object side surface. As another example, an optical axis portion of the eighth lens may be concave on the image side surface, and a peripheral portion of an optical axis of the eighth lens may be convex on the image side surface. The eighth lens may be formed of a material having high light transmittance and excellent workability. For example, the eighth lens may be formed of a plastic material or a glass material. The eighth lens may be configured to have a predetermined refractive index. For example, the refractive index of the eighth lens may be less than 1.6. As an example, the refractive index of the eighth lens may be greater than 1.52 and less than 1.57. The eighth lens may have a predetermined abbe number. For example, the abbe number of the eighth lens may be less than 60. As an example, the abbe number of the eighth lens may be greater than 53 and less than 58.
The first to eighth lenses may include spherical surfaces or aspherical surfaces as described above. When the first to eighth lenses include aspherical surfaces, the aspherical surfaces of the respective lenses may be represented by equation 1.
Equation 1
Figure BDA0003719968790000151
In equation 1, c is the reciprocal of the radius of curvature of the corresponding lens, k is a conic constant, r is the distance from a certain point on the aspherical surface to the optical axis, a to H and J are aspherical constants, and Z (or SAG) is the height in the optical axis direction from a certain point on the aspherical surface to the vertex of the corresponding aspherical surface.
The imaging lens system according to one or more of the above-described exemplary embodiments or the above-described forms may further include a diaphragm and a filter. As an example, the imaging lens system may further include a stop disposed between the second lens and the third lens or between the third lens and the fourth lens. As another example, the imaging lens system may further include a filter disposed between the eighth lens and the imaging plane. The diaphragm may be configured to adjust an amount of light incident in a direction of the imaging surface, and the filter may be configured to block light of a specific wavelength. For reference, the optical filter described herein is configured to block infrared rays, but light of a wavelength blocked by the optical filter is not limited to infrared rays.
The camera module according to the present disclosure may include one or more of the imaging lens systems according to the above-described aspects. As an example, a camera module may comprise an imaging lens system according to an aspect. As another example, a camera module may include an imaging lens system according to one aspect and an imaging lens system according to another aspect.
A camera module according to one form may be configured to be variable in size. In detail, a distance CL from a foremost point of the camera module (e.g., an object side surface of the first lens) to the image sensor may vary according to an operation state of the camera module. For example, the distance CL in the operating state of the camera module may be greater than the distance CL in the non-operating state of the camera module.
A camera module according to another aspect may include an imaging lens system that enables a size of the camera module to be changed. For example, the camera module may include an imaging lens system including first to eighth lenses arranged in order from the object side. Further, the camera module may include an image sensor configured to convert an optical signal incident in the imaging lens system into an electrical signal.
The camera module may be configured to move the imaging lens system toward the image sensor. For example, the camera module may move the imaging lens system toward the image sensor for focus adjustment or focus magnification adjustment, and move the imaging lens system toward the image sensor side to reduce the size of the camera module. The displacement of the imaging lens system according to the latter may be larger than the displacement of the imaging lens system according to the former. For detailed explanation, the displacement of the imaging lens system according to the latter can be expressed by the following conditional expressions.
0.6<(BFLx-BFLm)/BFLx<0.8
In the above-described conditional expressions, BFLx may be a distance from an image side surface of the last lens (the eighth lens in the case of an imaging lens system including eight lenses, and the sixth lens in the case of an imaging lens system including six lenses) to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is a distance from the image side surface of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.
For reference, in the above, it is described that the imaging lens system constituting the camera module includes eight lenses, but the number of lenses constituting the imaging lens system is not limited to eight lenses. For example, an imaging lens system constituting a camera module according to example embodiments may include six or seven lenses.
A camera module according to another form may satisfy the above-described conditional expression 0.6< (BFLx-BFLm)/BFLx <0.8 in order to be mounted in a thinned form, and further satisfy other conditions for achieving high resolution. For example, the camera module may include an image sensor having a significant size in order to achieve high resolution. In detail, the height of an image (the height of an imaging surface) that can be substantially formed in the image sensor may be 5.0mm to 9.0 mm.
Hereinafter, examples of the camera module are described with reference to fig. 1 to 5.
As shown in fig. 1, a camera module 20 according to an example embodiment may be mounted on a portable terminal 1000. In detail, the camera module 20 according to the present exemplary embodiment may be mounted on one surface of the portable terminal 1000 together with another type of camera module 10. However, the object on which the camera module 20 can be mounted is not limited to the portable terminal.
The portable terminal 1000 can include a housing 1002. The camera module 20 according to an example embodiment may be mounted in a housing 1002 of the portable terminal 1000 (fig. 2 and 3).
The camera module 20 according to example embodiments may be configured to achieve a predetermined viewing angle. For example, the viewing angle of the camera module 20 may be wider than the viewing angles of the other camera modules 10. In detail, the camera module 20 according to an example embodiment may be configured to capture an image of an object located within a short distance while having a resolution higher than that of the camera module 10.
The camera module 20 may include an imaging lens system 22, a first barrel 24, a second barrel 26, and an image sensor IS. However, the configuration of the camera module 20 is not limited to the above-described components. For example, the camera module 20 may further include a driving unit for driving the second barrel 26.
The camera module 20 may be configured such that the length CL in the optical axis direction is variable. For example, the length of the camera module 20 in the optical axis direction may be reduced from the state shown in fig. 2 to the state shown in fig. 3. In contrast, the length of the camera module 20 in the optical axis direction may extend from the state shown in fig. 3 to the state shown in fig. 2. The variable length of the camera module 20 in the optical axis direction may be approximately proportional to the distance from the last lens to the image sensor IS. In detail, a difference (BFLx-BFLm) between a distance BFLx from the last lens to the image sensor IS in the operating state (or image capturing state) of the camera module 20 and a distance BFLm from the last lens to the image sensor IS in the non-operating state of the camera module 20 may have the following numerical relationship with respect to a back focal length of the imaging lens system 22 or with respect to the distance BFLx from the last lens to the image sensor IS in the operating state (or image capturing state) of the camera module 20:
0.6<(BFLx-BFLm)/BFLx<0.8
the camera module 20 may include an imaging lens system 22. For example, the camera module 20 may include an imaging lens system 22, the imaging lens system 22 including eight lenses. However, the configuration of the imaging lens system 22 is not limited to eight lenses. For example, the imaging lens system 22 may include six or seven lenses.
As shown in fig. 4 and 5, the imaging lens system 22 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. However, the configuration of the imaging lens system 22 is not limited to eight lenses. For example, the imaging lens system 22 may include lenses of less than eight lenses. As an example, the imaging lens system 22 may include six lenses. Further, the imaging lens system 22 may further include a filter IF.
The first lens L1 to the eighth lens L8 may be disposed in order in the optical axis direction. For example, the second lens L2 may be disposed on the image side of the first lens L1, and the third lens L3 may be disposed on the image side of the second lens L2. Therefore, in the imaging lens system 22 according to the present exemplary embodiment, no optical element other than the filter IF or the image sensor IS disposed on the image side of the eighth lens L8 as the last lens. The first to eighth lenses L1 to L8 are configured to image incident light at a specific position. For example, light refracted by the first to eighth lenses L1 to L8 may be imaged on an imaging plane IP formed in the image sensor IS.
The imaging lens system 22 may be configured to have a sufficient space to move in the optical axis direction. In detail, the imaging lens system 22 may be configured to have a considerably large back focal length (i.e., a distance from the image-side surface of the eighth lens L8 to the imaging plane IP: BFL). For example, the BFL of the imaging lens system 22 may be greater than 1.9mm and less than 2.8 mm. The BFL of the imaging lens system 22 may increase or decrease in proportion to the length of the imaging lens system 22. For example, the ratio (BFL/TTL) between the BFL of the imaging lens system 22 and the length (TTL: the distance from the object side surface of the first lens L1 to the imaging plane IP) of the imaging lens system 22 may be greater than 0.15.
The BFL of the imaging lens system 22 may be used as a space for avoiding the first lens L1 to the eighth lens L8 in the direction of the imaging plane IP. For example, the first lens L1 to the eighth lens L8 may be moved by a size corresponding to BFL in a direction toward the imaging plane IP. For reference, the BFL of the imaging lens system 22 may have substantially the same dimensions as the BFLx of the camera module 20. However, BFL and BFLx do not have to be formed to have the same size. For example, when the imaging plane IP IS formed within the image sensor IS, BFL may be greater than BFLx.
The imaging lens system 22 may be configured to achieve high resolution. For example, the imaging lens system 22 may be configured to form an imaging plane IP having a considerable size. For example, the image height of the imaging plane IP may be 5.0mm to 9.0 mm.
The length of the camera module 20 may be changed by a plurality of lens barrels 24 and 26. For example, the length CL of the camera module 20 can be changed by driving the second barrel 26 accommodated in the first barrel 24 in the optical axis direction.
The first barrel 24 may be configured to receive the second barrel 26 and the image sensor IS. Further, the first barrel 24 can also accommodate a driving unit required to drive the second barrel 26. However, the components accommodated in the first barrel 24 are not limited to the second barrel 26, the image sensor IS, and the driving unit.
The second barrel 26 may be disposed in the first barrel 24 and may be configured to house the imaging lens system 22. The second barrel 26 may be configured to move in the optical axis direction. For example, the second barrel 26 may be moved toward the object or toward the image sensor IS in a state of accommodating the imaging lens system 22. The second barrel 26 may be partially extended from the first barrel 24 or completely retracted into the inside of the first barrel 24, depending on the moving direction. For example, when the second barrel 26 IS moved toward the object, the second barrel 26 may be extended to the outside of the first barrel 24, and when the second barrel 26 IS moved toward the image sensor IS, the second barrel 26 may be retracted to the inside of the first barrel 24.
A driving unit (not shown) may be configured to move the second barrel 26 in the optical axis direction. For example, the driving unit may move the second barrel 26 in the optical axis direction by driving the magnet and the driving coil. However, the components of the drive unit are not limited to the drive magnet and the drive coil.
The camera module 20 configured as described above can capture an image at high resolution. For example, the camera module 20 may enable the use of a large image sensor IS by forming a sufficient distance and space between the imaging lens system 22 and the image sensor IS. Further, the camera module 20 may be configured to facilitate thinning. For example, the size of the camera module 20 can be reduced by changing the length CL in the optical axis direction as described above. Therefore, the camera module 20 according to the present exemplary embodiment can be easily mounted in a small and thin electronic device.
Hereinafter, specific exemplary embodiments of an imaging lens system capable of making a camera module thinner will be described with reference to the accompanying drawings.
First, an imaging lens system according to a first exemplary embodiment is described with reference to fig. 6.
The imaging lens system 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, and an eighth lens 180.
The first lens 110 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 120 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 130 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 140 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The fifth lens 150 has positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 160 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 160. The seventh lens 170 has a positive refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 170. The eighth lens 180 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens element 180.
The imaging lens system 100 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 120 and the third lens 130, or between the third lens 130 and the fourth lens 140. The filter IF may be disposed between the eighth lens 180 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 110 to the eighth lens 180 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 100 configured as described above can exhibit aberration characteristics of the form shown in fig. 7. Table 1 and table 2 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 1
Figure BDA0003719968790000201
Figure BDA0003719968790000211
TABLE 2
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -1.14.E+00 9.54.E+01 9.96.E+00 7.11.E-01 4.69.E+01 9.50.E+01 6.57.E+01 -7.31.E+01
A 6.96.E-03 -2.82.E-02 -3.42.E-02 -1.06.E-02 2.13.E-02 -2.90.E-03 -3.10.E-02 2.42.E-03
B -8.61.E-03 1.39.E-01 1.41.E-01 3.64.E-02 -1.16.E-01 1.77.E-02 1.09.E-01 -6.27.E-02
C 1.38.E-02 -3.53.E-01 -3.80.E-01 -1.43.E-01 3.57.E-01 -1.33.E-01 -4.37.E-01 1.60.E-01
D -1.33.E-02 5.46.E-01 6.16.E-01 3.14.E-01 -7.22.E-01 4.12.E-01 1.06.E+00 -2.73.E-01
E 8.44.E-03 -5.66.E-01 -6.65.E-01 -4.59.E-01 9.87.E-01 -7.84.E-01 -1.72.E+00 3.14.E-01
F -3.69.E-03 4.13.E-01 5.05.E-01 4.71.E-01 -9.47.E-01 9.96.E-01 1.95.E+00 -2.54.E-01
G 1.15.E-03 -2.18.E-01 -2.78.E-01 -3.48.E-01 6.53.E-01 -8.81.E-01 -1.58.E+00 1.47.E-01
H -2.58.E-04 8.40.E-02 1.11.E-01 1.87.E-01 -3.29.E-01 5.53.E-01 9.27.E-01 -6.19.E-02
J 4.20.E-05 -2.37.E-02 -3.27.E-02 -7.30.E-02 1.21.E-01 -2.48.E-01 -3.94.E-01 1.90.E-02
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K -6.86.E+01 7.01.E+01 1.81.E+01 -2.79.E+01 -1.10.E+01 1.65.E+01 5.11.E+01 -1.01.E+01
A 4.57.E-04 1.80.E-02 7.06.E-03 -5.37.E-02 4.11.E-02 5.53.E-02 -8.35.E-02 -5.15.E-02
B 1.10.E-02 -2.38.E-02 3.08.E-03 2.03.E-02 -6.25.E-02 -4.40.E-02 2.99.E-02 2.01.E-02
C -5.81.E-02 -7.44.E-03 -1.42.E-02 -2.89.E-04 4.57.E-02 2.34.E-02 -7.42.E-03 -5.86.E-03
D 9.56.E-02 3.15.E-02 1.31.E-02 -4.99.E-03 -2.38.E-02 -9.87.E-03 1.81.E-03 1.29.E-03
E -9.51.E-02 -3.49.E-02 -7.60.E-03 3.22.E-03 8.49.E-03 3.08.E-03 -3.94.E-04 -2.18.E-04
F 6.47.E-02 2.39.E-02 3.10.E-03 -1.13.E-03 -2.12.E-03 -6.95.E-04 6.36.E-05 2.78.E-05
G -3.15.E-02 -1.13.E-02 -9.26.E-04 2.56.E-04 3.77.E-04 1.14.E-04 -7.24.E-06 -2.66.E-06
H 1.12.E-02 3.81.E-03 2.04.E-04 -3.96.E-05 -4.86.E-05 -1.36.E-05 5.83.E-07 1.88.E-07
J -2.91.E-03 -9.18.E-04 -3.31.E-05 4.27.E-06 4.53.E-06 1.19.E-06 -3.33.E-08 -9.79.E-09
An imaging lens system according to a second exemplary embodiment is described with reference to fig. 8.
The imaging lens system 200 includes a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, and an eighth lens 280.
The first lens 210 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 220 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 230 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 240 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The fifth lens 250 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 260 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 260. The seventh lens 270 has positive refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 270. The eighth lens 280 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens element 280.
The imaging lens system 200 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 220 and the third lens 230, or between the third lens 230 and the fourth lens 240. The filter IF may be disposed between the eighth lens 280 and the imaging plane IP. For reference, the diaphragm ST and the filter IF may be omitted IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 210 to the eighth lens 280 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 200 configured as described above can exhibit aberration characteristics of the form shown in fig. 9. Table 3 and table 4 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 3
Figure BDA0003719968790000221
Figure BDA0003719968790000231
TABLE 4
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -1.02.E+00 7.01.E+01 1.47.E+01 1.56.E+00 4.76.E+01 9.50.E+01 6.57.E+01 6.94.E+01
A 7.79.E-03 -3.36.E-02 -3.70.E-02 -4.33.E-03 -4.02.E-03 -9.50.E-03 -1.59.E-02 3.49.E-03
B -1.53.E-02 7.58.E-02 6.63.E-02 -3.16.E-02 -1.19.E-02 8.50.E-03 4.13.E-02 -5.58.E-02
C 3.37.E-02 -1.26.E-01 -9.46.E-02 1.45.E-01 3.01.E-02 -5.43.E-02 -2.02.E-01 1.58.E-01
D -4.64.E-02 1.51.E-01 8.90.E-02 -3.67.E-01 -8.70.E-02 1.20.E-01 5.23.E-01 -2.90.E-01
E 4.30.E-02 -1.31.E-01 -4.88.E-02 5.96.E-01 1.74.E-01 -1.68.E-01 -8.70.E-01 3.56.E-01
F -2.80.E-02 8.33.E-02 8.10.E-03 -6.62.E-01 -2.33.E-01 1.62.E-01 9.92.E-01 -3.03.E-01
G 1.31.E-02 -3.95.E-02 9.63.E-03 5.20.E-01 2.15.E-01 -1.13.E-01 -8.01.E-01 1.84.E-01
H -4.46.E-03 1.39.E-02 -9.16.E-03 -2.94.E-01 -1.39.E-01 5.83.E-02 4.65.E-01 -8.07.E-02
J 1.10.E-03 -3.62.E-03 4.19.E-03 1.20.E-01 6.42.E-02 -2.21.E-02 -1.95.E-01 2.56.E-02
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K -5.88.E+01 7.01.E+01 1.81.E+01 -4.65.E+01 -8.05.E+00 1.65.E+01 5.11.E+01 -1.16.E+01
A -2.01.E-03 -6.52.E-03 -7.02.E-02 -1.21.E-01 -9.46.E-03 6.02.E-02 -3.68.E-02 -3.64.E-02
B 1.19.E-02 2.36.E-02 1.13.E-01 8.79.E-02 -1.03.E-02 -4.69.E-02 3.37.E-03 8.87.E-03
C -3.96.E-02 -3.36.E-02 -1.18.E-01 -4.60.E-02 7.89.E-03 2.07.E-02 1.82.E-03 -1.52.E-03
D 5.48.E-02 2.36.E-02 9.48.E-02 1.83.E-02 -4.08.E-03 -6.64.E-03 -6.97.E-04 1.96.E-04
E -4.93.E-02 -1.21.E-02 -6.05.E-02 -5.52.E-03 1.49.E-03 1.61.E-03 1.23.E-04 -2.19.E-05
F 3.09.E-02 5.39.E-03 2.99.E-02 1.21.E-03 -4.03.E-04 -2.98.E-04 -1.33.E-05 2.52.E-06
G -1.38.E-02 -2.12.E-03 -1.11.E-02 -1.86.E-04 8.12.E-05 4.26.E-05 9.28.E-07 -2.81.E-07
H 4.32.E-03 6.78.E-04 3.09.E-03 1.98.E-05 -1.23.E-05 -4.69.E-06 -4.12.E-08 2.51.E-08
J -9.46.E-04 -1.64.E-04 -6.28.E-04 -1.45.E-06 1.39.E-06 3.93.E-07 1.02.E-09 -1.62.E-09
An imaging lens system according to a third exemplary embodiment is described with reference to fig. 10.
The imaging lens system 300 includes a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, and an eighth lens 380.
The first lens 310 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 320 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 330 has positive refractive power and has a convex object-side surface and a convex image-side surface. The fourth lens 340 has a negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 350 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 360 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 360. The seventh lens 370 has positive refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 370. The eighth lens 380 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens element 380.
The imaging lens system 300 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 320 and the third lens 330, or between the third lens 330 and the fourth lens 340. The filter IF may be disposed between the eighth lens 380 and the imaging plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 310 to the eighth lens 380 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 300 configured as described above can exhibit aberration characteristics of the form shown in fig. 11. Tables 5 and 6 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 5
Figure BDA0003719968790000241
Figure BDA0003719968790000251
TABLE 6
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -9.54.E-01 4.25.E+01 1.35.E+01 2.15.E+00 4.76.E+01 9.50.E+01 6.57.E+01 7.56.E+01
A 2.93.E-03 -7.15.E-03 -1.16.E-02 -5.53.E-03 -1.17.E-02 -1.17.E-02 -9.53.E-03 -3.93.E-03
B 5.14.E-03 3.18.E-03 2.22.E-03 -4.93.E-03 2.09.E-03 -8.59.E-03 2.56.E-03 -5.20.E-03
C -1.06.E-02 -6.83.E-03 -5.40.E-03 2.45.E-02 -9.72.E-03 1.42.E-02 -3.94.E-02 -3.18.E-03
D 1.55.E-02 1.18.E-02 1.24.E-02 -7.26.E-02 4.97.E-03 -2.73.E-02 1.14.E-01 1.51.E-02
E -1.55.E-02 -1.18.E-02 -1.40.E-02 1.44.E-01 2.73.E-02 3.89.E-02 -2.05.E-01 -2.33.E-02
F 1.11.E-02 7.57.E-03 1.00.E-02 -1.93.E-01 -7.35.E-02 -3.86.E-02 2.48.E-01 2.19.E-02
G -5.72.E-03 -3.25.E-03 -4.85.E-03 1.81.E-01 9.69.E-02 2.69.E-02 -2.12.E-01 -1.41.E-02
H 2.15.E-03 9.17.E-04 1.60.E-03 -1.21.E-01 -8.07.E-02 -1.31.E-02 1.30.E-01 6.54.E-03
J -5.91.E-04 -1.52.E-04 -3.41.E-04 5.81.E-02 4.53.E-02 4.29.E-03 -5.74.E-02 -2.19.E-03
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K 9.13.E+01 7.01.E+01 1.81.E+01 -5.13.E+01 -6.81.E+00 1.65.E+01 5.11.E+01 -1.22.E+01
A 2.09.E-02 3.38.E-02 -7.61.E-02 -1.45.E-01 -8.36.E-03 6.19.E-02 -5.33.E-02 -4.17.E-02
B -3.89.E-02 -3.18.E-02 1.24.E-01 1.20.E-01 -2.24.E-03 -4.32.E-02 1.45.E-02 1.33.E-02
C 2.32.E-02 4.48.E-03 -1.27.E-01 -7.64.E-02 -3.65.E-04 1.61.E-02 -3.14.E-03 -3.33.E-03
D -9.34.E-03 4.07.E-03 8.90.E-02 3.88.E-02 4.11.E-04 -4.09.E-03 8.88.E-04 6.76.E-04
E 4.21.E-03 -1.64.E-03 -4.58.E-02 -1.55.E-02 -1.94.E-04 6.57.E-04 -2.24.E-04 -1.11.E-04
F -2.59.E-03 -7.09.E-04 1.75.E-02 4.81.E-03 5.78.E-05 -5.07.E-05 3.99.E-05 1.43.E-05
G 1.39.E-03 8.65.E-04 -4.98.E-03 -1.14.E-03 -1.21.E-05 -3.17.E-06 -4.91.E-06 -1.44.E-06
H -5.18.E-04 -3.80.E-04 1.05.E-03 2.05.E-04 1.90.E-06 1.40.E-06 4.28.E-07 1.10.E-07
J 1.30.E-04 9.84.E-05 -1.63.E-04 -2.73.E-05 -2.28.E-07 -1.91.E-07 -2.66.E-08 -6.20.E-09
An imaging lens system according to a fourth exemplary embodiment is described with reference to fig. 12.
The imaging lens system 400 includes a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, and an eighth lens 480.
The first lens 410 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 420 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 430 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 440 has a negative refractive power and has a concave object-side surface and a concave image-side surface. The fifth lens 450 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 460 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 460. The seventh lens 470 has a positive refractive power and has a convex object-side surface and a concave image-side surface. Furthermore, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 470. The eighth lens 480 has negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 480.
The imaging lens system 400 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 420 and the third lens 430, or between the third lens 430 and the fourth lens 440. The filter IF may be disposed between the eighth lens 480 and the imaging plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 410 to the eighth lens 480 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 400 configured as described above can exhibit aberration characteristics of the form shown in fig. 13. Tables 7 and 8 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 7
Figure BDA0003719968790000261
Figure BDA0003719968790000271
TABLE 8
Figure BDA0003719968790000272
Figure BDA0003719968790000281
An imaging lens system according to a fifth exemplary embodiment is described with reference to fig. 14.
Imaging lens system 500 includes first lens 510, second lens 520, third lens 530, fourth lens 540, fifth lens 550, sixth lens 560, seventh lens 570, and eighth lens 580.
The first lens 510 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 520 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 530 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 540 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fifth lens 550 has positive refractive power and has a concave object-side surface and a convex image-side surface. Sixth lens 560 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 560. The seventh lens 570 has positive refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the seventh lens element 570. The eighth lens 580 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 580.
The imaging lens system 500 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 520 and the third lens 530, or between the third lens 530 and the fourth lens 540. The filter IF may be disposed between the eighth lens 580 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 510 to the eighth lens 580 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 500 configured as described above can exhibit aberration characteristics of the form shown in fig. 15. Table 9 and table 10 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 9
Surface numbering Labeling Radius of curvature Thickness/distance Refractive index Abbe number
S1 First lens 3.390 1.300 1.546 56.0
S2 31.463 0.040
S3 Second lens 9.048 0.345 1.656 21.5
S4 4.472 0.703
S5 Third lens -46.133 0.419 1.546 56.0
S6 -21.588 0.153
S7 Fourth lens 24.794 0.543 1.667 20.4
S8 27.878 0.929
S9 Fifth lens element -78.317 0.400 1.546 56.0
S10 -30.771 0.302
S11 Sixth lens element 14.560 0.420 1.570 37.4
S12 3.330 0.203
S13 Seventh lens element 2.045 0.520 1.546 56.0
S14 19.464 0.742
S15 Eighth lens element 39.967 0.520 1.537 55.7
S16 2.943 1.590
S17 Optical filter 0.210 1.518 64.2
S18 0.375
S19 Image plane 0.015
Watch 10
Figure BDA0003719968790000291
Figure BDA0003719968790000301
An imaging lens system according to a sixth exemplary embodiment is described with reference to fig. 16.
The imaging lens system 600 includes a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, and an eighth lens 680.
The first lens 610 has a positive refractive power and has a convex object-side surface and a concave image-side surface. Second lens 620 has negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 630 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 640 has positive refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 650 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 660 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 660. The seventh lens 670 has a positive refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 670. The eighth lens 680 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens element 680.
The imaging lens system 600 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 620 and the third lens 630, or between the third lens 630 and the fourth lens 640. The filter IF may be disposed between the eighth lens 680 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 610 to the eighth lens 680 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 600 configured as described above can exhibit aberration characteristics of the form shown in fig. 17. Tables 11 and 12 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 11
Surface numbering Labeling Radius of curvature Thickness/distance Refractive index Abbe number
S1 First lens 2.957 1.223 1.546 56.0
S2 18.307 0.066
S3 Second lens 9.009 0.250 1.667 20.4
S4 4.531 0.569
S5 Third lens 59.645 0.335 1.546 56.0
S6 84.387 0.282
S7 Fourth lens -31.496 0.623 1.644 23.5
S8 -30.604 0.500
S9 Fifth lens element -54.898 0.343 1.546 56.0
S10 -38.968 0.298
S11 Sixth lens element 23.468 0.414 1.570 37.4
S12 3.636 0.286
S13 Seventh lens element 1.892 0.551 1.546 56.0
S14 17.196 0.633
S15 Eighth lens element -34.440 0.458 1.546 56.0
S16 3.321 1.943
S17 Optical filter 0.210 1.518 64.2
S18 0.379
S19 Image plane 0.011
TABLE 12
Figure BDA0003719968790000311
Figure BDA0003719968790000321
An imaging lens system according to a seventh exemplary embodiment is described with reference to fig. 18.
The imaging lens system 700 includes a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, and an eighth lens 780.
The first lens 710 has a positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 720 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 730 has positive refractive power and has a convex object-side surface and a concave image-side surface. The fourth lens 740 has a negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 750 has positive refractive power and has a concave object-side surface and a convex image-side surface. Sixth lens 760 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 760. The seventh lens 770 has positive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 770. The eighth lens 780 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 780.
The imaging lens system 700 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 720 and the third lens 730, or between the third lens 730 and the fourth lens 740. The filter IF may be disposed between the eighth lens 780 and the imaging plane IP. For reference, the diaphragm ST and the filter IF may be omitted IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 710 to the eighth lens 780 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 700 configured as described above can exhibit aberration characteristics of the form shown in fig. 19. Table 13 and table 14 show lens characteristics and aspherical value of the imaging lens system according to the present exemplary embodiment.
Watch 13
Figure BDA0003719968790000331
Figure BDA0003719968790000341
TABLE 14
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -9.61.E-01 4.22.E+01 1.35.E+01 2.12.E+00 4.76.E+01 9.50.E+01 6.57.E+01 8.43.E+01
A 5.06.E-03 -1.25.E-02 -1.97.E-02 -9.75.E-03 -1.95.E-02 -2.00.E-02 -1.74.E-02 -8.27.E-03
B 1.12.E-02 8.76.E-03 4.52.E-03 -1.01.E-02 3.48.E-03 -1.42.E-02 2.11.E-02 -1.16.E-03
C -3.18.E-02 -2.13.E-02 -1.78.E-03 7.59.E-02 -3.64.E-02 8.85.E-03 -2.15.E-01 -5.86.E-02
D 6.38.E-02 4.47.E-02 -5.68.E-03 -3.14.E-01 8.13.E-02 9.02.E-03 8.21.E-01 1.93.E-01
E -8.85.E-02 -5.75.E-02 4.39.E-02 8.59.E-01 -4.78.E-02 -4.77.E-02 -2.01.E+00 -3.59.E-01
F 8.73.E-02 4.85.E-02 -9.82.E-02 -1.60.E+00 -1.76.E-01 9.27.E-02 3.35.E+00 4.41.E-01
G -6.23.E-02 -2.77.E-02 1.25.E-01 2.09.E+00 5.32.E-01 -1.12.E-01 -3.97.E+00 -3.83.E-01
H 3.24.E-02 1.04.E-02 -1.05.E-01 -1.96.E+00 -7.53.E-01 9.54.E-02 3.39.E+00 2.42.E-01
J -1.23.E-02 -2.20.E-03 6.13.E-02 1.33.E+00 6.66.E-01 -6.03.E-02 -2.10.E+00 -1.11.E-01
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K 9.60.E+01 7.01.E+01 1.81.E+01 -4.75.E+01 -6.73.E+00 1.65.E+01 5.11.E+01 -1.20.E+01
A 3.67.E-02 5.75.E-02 -1.32.E-01 -2.43.E-01 -1.40.E-02 1.06.E-01 -8.75.E-02 -6.99.E-02
B -9.30.E-02 -7.66.E-02 3.10.E-01 2.77.E-01 -5.15.E-03 -1.09.E-01 3.04.E-02 3.12.E-02
C 5.72.E-02 2.13.E-02 -4.67.E-01 -2.39.E-01 -1.65.E-03 6.13.E-02 -6.53.E-03 -1.07.E-02
D 1.86.E-02 -4.25.E-03 4.95.E-01 1.60.E-01 2.32.E-03 -2.43.E-02 2.00.E-03 2.93.E-03
E -7.22.E-02 3.22.E-02 -3.95.E-01 -8.41.E-02 -1.51.E-03 6.72.E-03 -7.34.E-04 -6.64.E-04
F 8.01.E-02 -5.42.E-02 2.40.E-01 3.43.E-02 6.27.E-04 -1.25.E-03 1.98.E-04 1.24.E-04
G -5.75.E-02 4.62.E-02 -1.12.E-01 -1.08.E-02 -1.82.E-04 1.43.E-04 -3.64.E-05 -1.83.E-05
H 2.97.E-02 -2.46.E-02 3.93.E-02 2.59.E-03 3.92.E-05 -5.73.E-06 4.64.E-06 2.09.E-06
J -1.13.E-02 8.83.E-03 -1.03.E-02 -4.67.E-04 -6.41.E-06 -1.04.E-06 -4.19.E-07 -1.78.E-07
An imaging lens system according to an eighth exemplary embodiment is described with reference to fig. 20.
The imaging lens system 800 includes a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, and an eighth lens 880.
First lens 810 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 820 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 830 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 840 has a negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 850 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The sixth lens 860 has negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 860. The seventh lens 870 has a positive refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens 870. The eighth lens 880 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens 880.
The imaging lens system 800 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 820 and the third lens 830, or between the third lens 830 and the fourth lens 840. The filter IF may be disposed between the eighth lens 880 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 810 to the eighth lens 880 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 800 configured as described above can exhibit aberration characteristics of the form shown in fig. 21. Tables 15 and 16 show lens characteristics and aspherical surface values of the imaging lens system according to the present exemplary embodiment.
Watch 15
Figure BDA0003719968790000351
Figure BDA0003719968790000361
TABLE 16
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -9.95.E-01 4.22.E+01 1.34.E+01 1.93.E+00 4.76.E+01 9.50.E+01 6.57.E+01 7.23.E+01
A 5.64.E-03 -3.77.E-03 -6.50.E-03 -3.42.E-03 -5.19.E-03 -4.29.E-03 -6.71.E-03 1.04.E-03
B -5.69.E-03 2.28.E-04 3.44.E-04 -5.42.E-04 -3.18.E-03 -8.06.E-03 2.21.E-03 -1.75.E-02
C 5.33.E-03 1.31.E-03 1.40.E-03 -1.86.E-04 3.48.E-03 1.11.E-02 1.39.E-03 2.76.E-02
D -3.09.E-03 -1.92.E-03 -1.97.E-03 3.16.E-03 -3.45.E-03 -1.31.E-02 -1.61.E-02 -2.91.E-02
E 1.20.E-03 1.69.E-03 1.95.E-03 -5.48.E-03 2.37.E-03 1.12.E-02 2.88.E-02 2.12.E-02
F -3.24.E-04 -1.02.E-03 -1.35.E-03 5.31.E-03 -9.04.E-04 -6.94.E-03 -2.81.E-02 -1.10.E-02
G 6.43.E-05 4.28.E-04 6.58.E-04 -3.38.E-03 3.50.E-05 3.14.E-03 1.76.E-02 4.11.E-03
H -9.92.E-06 -1.28.E-04 -2.26.E-04 1.49.E-03 1.61.E-04 -1.04.E-03 -7.53.E-03 -1.12.E-03
J 1.28.E-06 2.71.E-05 5.47.E-05 -4.67.E-04 -9.51.E-05 2.51.E-04 2.25.E-03 2.20.E-04
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K 7.15.E+01 7.01.E+01 1.81.E+01 -4.99.E+01 -7.45.E+00 1.65.E+01 5.11.E+01 -1.49.E+01
A 7.53.E-03 2.83.E-02 -6.20.E-02 -1.04.E-01 -2.12.E-03 4.17.E-02 -4.17.E-02 -2.97.E-02
B -1.58.E-02 -3.64.E-02 7.91.E-02 6.22.E-02 -1.09.E-02 -3.09.E-02 1.27.E-02 9.71.E-03
C 2.79.E-03 3.63.E-02 -6.14.E-02 -2.52.E-02 8.18.E-03 1.58.E-02 -2.59.E-03 -2.53.E-03
D 7.62.E-03 -3.01.E-02 3.52.E-02 7.74.E-03 -3.38.E-03 -5.83.E-03 3.86.E-04 4.88.E-04
E -9.15.E-03 1.75.E-02 -1.58.E-02 -1.92.E-03 7.78.E-04 1.47.E-03 -4.10.E-05 -6.90.E-05
F 5.70.E-03 -7.14.E-03 5.49.E-03 3.84.E-04 -9.97.E-05 -2.56.E-04 3.11.E-06 7.17.E-06
G -2.32.E-03 2.10.E-03 -1.44.E-03 -6.00.E-05 5.15.E-06 3.18.E-05 -1.73.E-07 -5.51.E-07
H 6.56.E-04 -4.50.E-04 2.83.E-04 6.99.E-06 4.36.E-07 -2.85.E-06 7.29.E-09 3.13.E-08
J -1.31.E-04 7.03.E-05 -4.09.E-05 -5.89.E-07 -1.03.E-07 1.85.E-07 -2.47.E-10 -1.31.E-09
An imaging lens system according to a ninth exemplary embodiment is described with reference to fig. 22.
The imaging lens system 900 includes a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, and an eighth lens 980.
The first lens 910 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 920 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 930 has a positive refractive power and has a concave object-side surface and a convex image-side surface. The fourth lens 940 has a negative refractive power and has a concave object-side surface and a convex image-side surface. The fifth lens 950 has positive refractive power and has a convex object-side surface and a concave image-side surface. The sixth lens 960 has a negative refractive power and has a convex object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens 960. Seventh lens 970 has positive refractive power and has a convex object side surface and a concave image side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the seventh lens element 970. The eighth lens 980 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the eighth lens element 980.
The imaging lens system 900 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 920 and the third lens 930, or between the third lens 930 and the fourth lens 940. The filter IF may be disposed between the eighth lens 980 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 910 to the eighth lens 980 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 900 configured as described above can exhibit aberration characteristics of the form shown in fig. 23. Tables 17 and 18 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
TABLE 17
Figure BDA0003719968790000371
Figure BDA0003719968790000381
Watch 18
Surface numbering S1 S2 S3 S4 S5 S6 S7 S8
K -9.56.E-01 4.06.E+01 1.37.E+01 2.50.E+00 4.76.E+01 9.50.E+01 6.57.E+01 5.28.E+01
A 3.28.E-03 -1.11.E-02 -1.74.E-02 -9.28.E-03 -9.55.E-03 -8.65.E-03 -5.39.E-03 9.18.E-03
B 2.94.E-03 5.61.E-03 7.05.E-03 6.03.E-03 -1.10.E-03 -8.73.E-03 -1.49.E-02 -2.95.E-02
C -6.81.E-03 3.21.E-03 7.56.E-03 -1.26.E-02 3.62.E-03 1.29.E-02 2.63.E-02 3.08.E-02
D 1.06.E-02 -1.27.E-02 -2.60.E-02 4.08.E-02 -1.99.E-02 -2.16.E-02 -6.42.E-02 -3.39.E-02
E -1.09.E-02 1.80.E-02 4.11.E-02 -8.68.E-02 5.62.E-02 3.33.E-02 1.27.E-01 3.62.E-02
F 7.74.E-03 -1.63.E-02 -4.27.E-02 1.21.E-01 -9.44.E-02 -4.11.E-02 -1.74.E-01 -3.04.E-02
G -3.90.E-03 1.03.E-02 3.11.E-02 -1.15.E-01 1.04.E-01 3.77.E-02 1.66.E-01 1.86.E-02
H 1.41.E-03 -4.64.E-03 -1.62.E-02 7.72.E-02 -7.81.E-02 -2.51.E-02 -1.11.E-01 -8.15.E-03
J -3.68.E-04 1.50.E-03 6.07.E-03 -3.65.E-02 4.12.E-02 1.20.E-02 5.32.E-02 2.57.E-03
Surface numbering S9 S10 S11 S12 S13 S14 S15 S16
K 9.60.E+01 7.01.E+01 1.81.E+01 -6.58.E+01 -7.13.E+00 1.65.E+01 5.11.E+01 -8.14.E+00
A 2.94.E-02 1.65.E-02 -4.96.E-02 -9.68.E-02 -2.96.E-03 4.18.E-02 -3.98.E-02 -3.21.E-02
B -3.52.E-02 -7.11.E-03 5.68.E-02 6.26.E-02 -4.31.E-03 -2.09.E-02 8.72.E-03 8.48.E-03
C 8.44.E-03 -1.52.E-02 -4.64.E-02 -3.52.E-02 2.50.E-03 6.29.E-03 -1.56.E-03 -1.93.E-03
D 5.54.E-03 1.81.E-02 2.94.E-02 1.76.E-02 -1.38.E-03 -1.61.E-03 3.46.E-04 3.58.E-04
E -5.81.E-03 -1.15.E-02 -1.48.E-02 -7.24.E-03 4.82.E-04 3.46.E-04 -6.55.E-05 -5.04.E-05
F 2.83.E-03 5.25.E-03 5.83.E-03 2.32.E-03 -1.10.E-04 -5.88.E-05 8.57.E-06 5.22.E-06
G -9.74.E-04 -1.85.E-03 -1.75.E-03 -5.55.E-04 1.72.E-05 7.65.E-06 -7.65.E-07 -3.95.E-07
H 2.65.E-04 5.11.E-04 3.94.E-04 9.70.E-05 -1.87.E-06 -7.49.E-07 4.75.E-08 2.18.E-08
J -5.83.E-05 -1.08.E-04 -6.55.E-05 -1.22.E-05 1.44.E-07 5.47.E-08 -2.09.E-09 -8.69.E-10
An imaging lens system according to a tenth exemplary embodiment is described with reference to fig. 24.
The imaging lens system 1001 includes a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, and a sixth lens 1060.
The first lens 1010 has positive refractive power and has a convex object-side surface and a concave image-side surface. The second lens 1020 has a negative refractive power and has a convex object-side surface and a concave image-side surface. The third lens 1030 has positive refractive power and has a convex object-side surface and a concave image-side surface. Fourth lens 1040 has a negative refractive power and has a convex object-side surface and a concave image-side surface. Inflection points are formed on the object-side surface and the image-side surface of the fourth lens element 1040. Fifth lens 1050 has positive refractive power and has a convex object-side surface and a convex image-side surface. Furthermore, inflection points are formed on the object-side surface and the image-side surface of the fifth lens element 1050. The sixth lens 1060 has a negative refractive power and has a concave object-side surface and a concave image-side surface. In addition, inflection points are formed on the object-side surface and the image-side surface of the sixth lens element 1060.
The imaging lens system 1001 may further include a stop ST (not shown), a filter IF, and an imaging plane IP. For example, the stop ST may be disposed between the second lens 1020 and the third lens 1030, or between the third lens 1030 and the fourth lens 1040. The filter IF may be disposed between the sixth lens 1060 and the image plane IP. For reference, the diaphragm ST and the filter IF may be omitted, IF necessary. The imaging plane IP may be formed at a position where light incident from the first lens 1010 to the sixth lens 1060 is imaged. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or formed within the image sensor IS.
The imaging lens system 1001 configured as described above can exhibit aberration characteristics of the form shown in fig. 25. Tables 19 and 20 show lens characteristics and aspherical values of the imaging lens system according to the present exemplary embodiment.
Watch 19
Figure BDA0003719968790000391
Figure BDA0003719968790000401
Watch 20
Surface numbering S1 S2 S3 S4 S5 S6
K -1.03.E+00 -1.20.E+01 2.23.E+01 4.16.E+00 9.13.E+01 -7.93.E+01
A 1.23.E-03 -4.57.E-03 -1.11.E-02 -9.54.E-03 -1.07.E-02 -1.01.E-02
B 8.44.E-04 3.06.E-03 5.77.E-03 7.25.E-03 4.38.E-03 1.01.E-03
C -4.68.E-04 -2.01.E-03 -3.75.E-03 -5.65.E-03 -4.01.E-03 5.54.E-05
D 1.86.E-04 8.97.E-04 2.03.E-03 3.41.E-03 2.33.E-03 -2.52.E-04
E -4.99.E-05 -2.56.E-04 -7.20.E-04 -1.31.E-03 -8.96.E-04 1.09.E-04
F 8.90.E-06 4.64.E-05 1.61.E-04 3.15.E-04 2.19.E-04 -2.51.E-05
G -1.01.E-06 -5.15.E-06 -2.18.E-05 -4.56.E-05 -3.25.E-05 3.44.E-06
H 6.56.E-08 3.22.E-07 1.64.E-06 3.64.E-06 2.64.E-06 -2.67.E-07
J -1.86.E-09 -8.67.E-09 -5.31.E-08 -1.23.E-07 -8.89.E-08 9.14.E-09
Surface numbering S7 S8 S9 S10 S11 S12
K -2.89.E+01 -1.64.E+01 -1.17.E+01 -2.16.E+00 -8.60.E+00 -3.21.E-01
A -4.54.E-03 -7.65.E-03 -9.69.E-04 4.45.E-03 -6.38.E-03 -9.67.E-03
B -8.21.E-04 2.23.E-04 -2.77.E-04 -5.04.E-04 1.79.E-04 7.39.E-04
C 5.18.E-04 2.04.E-04 6.49.E-05 3.26.E-05 5.62.E-06 -5.05.E-05
D -1.36.E-04 -6.25.E-05 -6.87.E-06 7.48.E-07 6.40.E-07 2.55.E-06
E 1.96.E-05 8.64.E-06 3.72.E-07 -1.04.E-07 -9.45.E-08 -9.06.E-08
F -1.65.E-06 -6.51.E-07 -5.95.E-09 -5.39.E-09 4.30.E-09 2.17.E-09
G 7.97.E-08 2.70.E-08 -4.55.E-10 7.10.E-10 -9.76.E-11 -3.31.E-11
H -1.99.E-09 -5.59.E-10 2.47.E-11 -2.32.E-11 1.13.E-12 2.91.E-13
J 1.93.E-11 4.25.E-12 -3.52.E-13 2.55.E-13 -5.38.E-15 -1.14.E-15
Example imaging lens systems described herein may include the following features. For example, the focal length of the imaging lens system is 7mm to 12mm, the TTL of the imaging lens system is 8.0mm to 13.0mm, the focal length of the first lens is 5.0mm to 9.0mm, the focal length of the second lens is-22 mm to 10mm, the focal length of the third lens is 28mm to 600mm, and the focal length of the fourth lens is-300 mm to 2000 mm. The focal length of the fifth lens is 80mm to 1000mm, the focal length of the sixth lens is-14.0 mm to-5.0 mm, the focal length of the seventh lens is 3.0mm to 6.0mm, and the focal length of the eighth lens is-8.0 mm to-3.0 mm.
Tables 21 to 26 are optical characteristic values and conditional expression values of the imaging lens systems according to the first to eighth exemplary embodiments.
TABLE 21
Figure BDA0003719968790000411
TABLE 22
Figure BDA0003719968790000412
Figure BDA0003719968790000421
TABLE 23
Figure BDA0003719968790000422
Figure BDA0003719968790000431
Watch 24
Figure BDA0003719968790000432
Figure BDA0003719968790000441
TABLE 25
Figure BDA0003719968790000442
Watch 26
Figure BDA0003719968790000443
As described above, the imaging lens system can be mounted in a thin portable electronic device.
While specific example embodiments have been shown and described above, it will be apparent, after understanding the present disclosure, that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely as illustrative and not for purposes of limitation. The description of features or aspects in each example is considered applicable to similar features or aspects in other examples. Suitable results may also be achieved if the described techniques are performed in a different order and/or if components in a described system, architecture, device, or circuit are combined in a different manner and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is defined not by the detailed description but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents are to be construed as being included in the present disclosure.

Claims (24)

1. An imaging lens system comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in order from an object side, wherein at least one of the first lens to the eighth lens has at least one aspherical surface,
wherein 0.15< BFL/TTL and 1.9mm < BFL <2.8mm are satisfied, where BFL is a distance from an image-side surface of the eighth lens element to an imaging surface, and TTL is a distance from an object-side surface of the first lens element to the imaging surface.
2. The imaging lens system of claim 1, wherein
And the requirement that ImgHT is less than or equal to 5.0mm and less than or equal to 9.0mm is met, wherein ImgHT is the height of the imaging plane.
3. The imaging lens system of claim 2, wherein
0.1< T1/ImgHT <0.2 is satisfied, where T1 is a thickness of the first lens at a center of an optical axis.
4. The imaging lens system of claim 1, wherein
0< f1/f <2.0 is satisfied, where f1 is a focal length of the first lens, and f is a focal length of the imaging lens system.
5. The imaging lens system of claim 1, wherein
-3.5< f2/f <0 is satisfied, where f2 is the focal length of the second lens and f is the focal length of the imaging lens system.
6. The imaging lens system of claim 1, wherein
0.8< TTL/f <1.2 is satisfied, where f is a focal length of the imaging lens system.
7. The imaging lens system of claim 2, wherein
(TTL-BFL)/2ImgHT <0.65 is satisfied, wherein 2ImgHT is the diagonal length of the imaging plane.
8. The imaging lens system of claim 1, wherein
0< f7/f <0.8 is satisfied, where f7 is a focal length of the seventh lens, and f is a focal length of the imaging lens system.
9. The imaging lens system of claim 1, wherein
1.3< SUMT/BFL <2.8, where SUMT is a sum of thicknesses of the first to eighth lenses at a center of an optical axis.
10. A camera module, comprising:
the imaging lens system of claim 1; and
an image sensor including an imaging surface provided at an imaging plane of the imaging lens system,
wherein the image sensor converts an image of an object formed on an effective imaging area of the imaging surface by a lens of the imaging lens system into an electric signal.
11. A portable terminal, comprising:
a housing; and
the camera module of claim 10, disposed in the housing.
12. An imaging lens system comprising:
a first lens having a positive refractive power;
a second lens having refractive power;
a third lens having a positive refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power; and
a sixth lens having a negative refractive power,
wherein at least one of the first lens to the sixth lens has at least one aspherical surface, an
Wherein 2.0< DL1LP/BFL <5.4 is satisfied, wherein DL1LP is a distance from an object-side surface of the first lens to an image-side surface of a last lens, the last lens being a lens closest to an imaging plane, and BFL is a distance from the image-side surface of the last lens to the imaging plane.
13. The imaging lens system of claim 12, wherein the fourth lens has a negative refractive power.
14. The imaging lens system of claim 12, wherein the fifth lens has a positive refractive power.
15. The imaging lens system of claim 12, wherein the fourth lens has a concave image-side surface.
16. The imaging lens system of claim 12, wherein
0.15< BFL/TTL <0.40 is satisfied, wherein TTL is a distance from an object side surface of the first lens to the imaging surface.
17. The imaging lens system of claim 12, wherein
1.0< TTL/f <1.3 is satisfied, where TTL is a distance from an object side surface of the first lens element to the imaging surface, and f is a focal length of the imaging lens system.
18. A camera module, comprising:
the imaging lens system of claim 12; and
an image sensor including an imaging surface provided at an imaging plane of the imaging lens system,
wherein the image sensor converts an image of an object formed on an effective imaging area of the imaging surface by a lens of the imaging lens system into an electric signal, an
Wherein the imaging lens system is movable toward the image sensor and satisfies 0.6< (BFLx-BFLm)/BFLx <0.8, wherein BFLx is a distance from an image side surface of a last lens closest to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is a distance from the image side surface of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.
19. A portable terminal, comprising:
a housing; and
the camera module of claim 18, disposed in the housing.
20. A camera module, comprising:
an imaging lens system including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in this order from an object side, wherein at least one of the first lens to the sixth lens has at least one aspherical surface; and
an image sensor is provided with a plurality of image sensors,
wherein the imaging lens system is movable toward the image sensor and satisfies 0.6< (BFLx-BFLm)/BFLx <0.8, wherein BFLx is a distance from an image side surface of a last lens closest to the image sensor in a state where the imaging lens system is positioned farthest from the image sensor, and BFLm is a distance from the image side surface of the last lens to the image sensor in a state where the imaging lens system is positioned closest to the image sensor.
21. The camera module of claim 20, wherein the imaging lens system further comprises one or more additional lenses disposed on an image side of the sixth lens toward the image sensor, and
wherein 0.15< BFL/TTL and 1.9mm < BFL are satisfied, where BFL is a distance from an image-side surface of the last lens to an imaging surface of the imaging lens system, and TTL is a distance from an object-side surface of the first lens to the imaging surface.
22. A portable terminal, comprising:
a housing;
the camera module of claim 20, disposed in the housing; and
one or more other camera modules.
23. A camera module, comprising:
a first barrel accommodating the second barrel;
an imaging lens system provided in the second barrel; and
an image sensor disposed in the first barrel and including an imaging surface disposed at an imaging plane of the imaging lens system,
wherein the second barrel is movable to at least partially protrude from the first barrel,
wherein the imaging lens system comprises seven or more lenses, wherein at least one of the seven or more lenses has at least one aspheric surface, an
Wherein 0.15< BFL/TTL and 1.9mm < BFL are satisfied, wherein BFL is a distance from an image side surface of a rearmost lens closest to the image sensor to the imaging surface, and TTL is a distance from an object side surface of a foremost lens farthest from the image sensor to the imaging surface.
24. The camera module of claim 23, wherein the seven or more lenses comprise at least:
a first lens having a positive refractive power;
a second lens having refractive power;
a third lens having a positive refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power; and
a sixth lens element having negative refractive power, an
Wherein the first lens to the sixth lens are arranged in order from an object side.
CN202210784586.XA 2021-09-30 2022-06-27 Imaging lens system, camera module and portable terminal Pending CN114994870A (en)

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KR10-2021-0129628 2021-09-30
KR1020210129628A KR20230046530A (en) 2021-09-30 2021-09-30 Imaging Lens System and Camera module
CN202210735066.XA CN115903177A (en) 2021-09-30 2022-06-27 Imaging lens system, camera module and portable terminal

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