Optical image capturing system

Abstract

The invention relates to an optical imaging system. The optical image capturing system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens disposed in order from an object side, in which a conditional expression TTL / (2 * IMG HT) < = 0.57 is satisfied, where TTL is a distance from an object side surface of the first lens to an image plane along an optical axis, and IMG HT is half a diagonal length of the image plane.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority of Korean Patent Application No. 10 - 2024 - 0064106, filed on May 16, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

[0003] This disclosure relates to an optical imaging system including five lenses. Background art

[0004] High - resolution cameras can be employed in portable electronic devices, and high - resolution cameras can also be used for rear cameras as well as for front cameras.

[0005] As the resolution of the camera increases, the total optical length of the lens may increase, but due to the thinning of portable electronic devices, it is necessary to produce a camera with high resolution and short total optical length.

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

[0007] This Summary of the Invention is provided to introduce a selection of concepts in a simplified form; these concepts are further described below in the Detailed Description. This Summary of the Invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0008] In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially disposed on the object side, where the conditional expression TTL / (2×IMG HT)≤0.57 is satisfied, where TTL is the distance along the optical axis from the object side surface of the first lens to the image plane, and IMG HT is half of the diagonal length of the image plane.

[0009] The conditional expression - 0.1 < f1 / f3 < 1.0 may be satisfied, where f1 is the focal length of the first lens, and f3 is the focal length of the third lens.

[0010] The conditional expression - 0.6 < f1 / f2 < 0 may be satisfied, where f1 is the focal length of the first lens, and f2 is the focal length of the second lens.

[0011] The object side surface of the second lens may be concave.

[0012] It can satisfy the conditional expression 0 < v1 - v4 < 45, where v1 is the Abbe number of the first lens, and v4 is the Abbe number of the fourth lens.

[0013] It can satisfy the conditional expression 70° < FOV × (2 × IMG HT) / f, where FOV is the field of view of the optical imaging system, and f is the focal length of the optical imaging system.

[0014] The object side surface of the fourth lens can be convex.

[0015] The image side surface of the third lens can be convex.

[0016] It can satisfy the conditional expression Fno × {TTL / (2 × IMG HT)} ≤ 1.4, where Fno is the F-number of the optical imaging system.

[0017] In another general aspect, the optical imaging system includes a first lens with positive refractive power, a second lens with negative refractive power, a third lens with refractive power, a fourth lens with refractive power, and a fifth lens with negative refractive power. The first lens to the fifth lens are arranged in sequence from the object side. It satisfies the conditional expression -0.1 < f1 / f3 < 1.0, where f1 is the focal length of the first lens, and f3 is the focal length of the third lens.

[0018] The image side surface of the first lens can be concave and can satisfy the conditional expression D1 / f < 0.1, where D1 is the axial distance between the image side surface of the first lens and the object side surface of the second lens, and f is the focal length of the optical imaging system.

[0019] It can satisfy the conditional expression 80° ≤ FOV, where FOV is the field of view of the optical imaging system.

[0020] It can satisfy the conditional expression TTL / (2 × IMG HT) ≤ 0.57, where TTL is the distance on the optical axis from the object side surface of the first lens to the image plane, and IMG HT is half of the diagonal length of the image plane.

[0021] The third lens can have negative refractive power and a concave object side surface.

[0022] It can satisfy the conditional expression 3 < |f4 / f|, where f4 is the focal length of the fourth lens, and f is the focal length of the optical imaging system.

[0023] According to the following detailed description, drawings, and claims, other features and aspects will be obvious. Description of the Drawings

[0024] Figure 1AThis is a configuration diagram showing an optical imaging system according to a first embodiment of the present disclosure.

[0025] Figure 1B It is a graph showing the aberration characteristics of the optical imaging system according to the first embodiment of the present disclosure.

[0026] Figure 2A This is a configuration diagram showing an optical imaging system according to a second embodiment of the present disclosure.

[0027] Figure 2B It is a graph showing the aberration characteristics of the optical imaging system according to the second embodiment of the present disclosure.

[0028] Figure 3A This is a configuration diagram showing an optical imaging system according to a third embodiment of the present disclosure.

[0029] Figure 3B It is a graph representing the aberration characteristics of the optical imaging system according to the third embodiment of this disclosure.

[0030] Figure 4A This is a configuration diagram showing an optical imaging system according to a fourth embodiment of the present disclosure.

[0031] Figure 4B It is a graph representing the aberration characteristics of the optical imaging system according to the fourth embodiment of the present disclosure.

[0032] Figure 5A This is a configuration diagram showing an optical imaging system according to a fifth embodiment of the present disclosure.

[0033] Figure 5B It is a graph representing the aberration characteristics of the optical imaging system according to the fifth embodiment of this disclosure.

[0034] Figure 6A This is a configuration diagram showing an optical imaging system according to a sixth embodiment of the present disclosure.

[0035] Figure 6B It is a graph representing the aberration characteristics of the optical imaging system according to the sixth embodiment of this disclosure.

[0036] Figure 7A This is a configuration diagram showing an optical imaging system according to a seventh embodiment of the present disclosure.

[0037] Figure 7B It is a graph representing the aberration characteristics of the optical imaging system according to the seventh embodiment of this disclosure.

[0038] Figure 8A This is a configuration diagram showing an optical imaging system according to the eighth embodiment of the present disclosure.

[0039] Figure 8B It is a graph representing the aberration characteristics of the optical imaging system according to the eighth embodiment of the present disclosure.

[0040] Figure 9A This is a configuration diagram showing an optical imaging system according to a ninth embodiment of the present disclosure.

[0041] Figure 9B It is a graph representing the aberration characteristics of the optical imaging system according to the ninth embodiment of the present disclosure.

[0042] Figure 10A This is a configuration diagram showing an optical imaging system according to a second embodiment of the present disclosure.

[0043] Figure 10B It is a graph showing the aberration characteristics of the optical imaging system according to the tenth embodiment of this disclosure.

[0044] Throughout the accompanying drawings and detailed embodiments, the same reference numerals denote the same elements unless otherwise described. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0045] In the following text, although examples of this disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0046] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, but can be altered as will become apparent upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0047] 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 in which the methods, apparatuses, and / or systems described herein will be apparent upon understanding this disclosure.

[0048] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," or "attached to" another element, it may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly" "on," "directly connected to," or "directly attached to" another element, there are no other elements in between.

[0049] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more of the associated listed items; similarly, “at least one of…” includes any one of the associated listed items and any combination of any two or more of the associated listed items.

[0050] Although terms such as “first,” “second,” and “third” may be used in this document to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, the first component, first assembly, first region, first layer, or first part mentioned in the examples described herein may also be referred to as a second component, second assembly, second region, second layer, or second part without departing from the teachings of the examples.

[0051] For ease of description, spatial relative terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. In addition to the orientation depicted in the drawings, these spatial relative terms are intended to also include different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as “above” or “upper” relative to another element will consequently be “below” or “lower” relative to said other element. Therefore, the term “above” includes both upper and lower orientations, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein will be interpreted accordingly.

[0052] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. The terms “a,” “an,” and “the” are intended to include the plural meaning as well, unless the context clearly indicates otherwise. The terms “comprising,” “including,” and “having” specify the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0053] The shapes shown in the accompanying drawings may vary due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that occur during manufacturing.

[0054] In this article, it is important to note that the term “may” is used with respect to examples. For example, regarding what an example may include or implement, it means that there exists at least one example that includes or implements this feature, but not all examples are limited to this.

[0055] As will be apparent upon understanding this disclosure, the features of the examples described herein can be combined in various ways. Furthermore, although the examples described herein have multiple configurations, other configurations are also possible, as will be apparent upon understanding this disclosure.

[0056] One aspect of this disclosure is to provide an optical imaging system with a slim profile.

[0057] In implementations, the units for the values ​​of radius of curvature, thickness, distance, focal length, IMG HT (half the diagonal length of the image plane), and lens half-aperture can be millimeters (mm), and the unit for field of view (FOV) can be degrees (°). Furthermore, the lens thickness and the distance between lenses can refer to the thickness and distance along the optical axis.

[0058] In an implementation, the object side may represent the orientation in which the object is positioned, and the image side may represent, for example, the orientation in which an image plane on which an image is formed or the orientation in which an image sensor is positioned.

[0059] In the description of the lens shape in the embodiments, a configuration where one surface is convex can indicate that the paraxial region of the surface may be convex, and a configuration where one surface is concave can indicate that the paraxial region of the surface may be concave. The paraxial region of the lens surface is the central portion of the lens surface surrounding the optical axis of the lens surface, where light rays incident on the lens surface form a small angle θ with the optical axis, and approximations of sinθ≈θ, tanθ≈θ, and cosθ≈1 are valid. Therefore, even if one surface of the lens is described as convex, the edge portion of the lens can be concave. Similarly, even if one surface of the lens is described as concave, the edge portion of the lens can be convex.

[0060] The optical imaging system according to the embodiment can be used as a camera in a mobile device. The optical imaging system according to the embodiment can be a camera mounted on the front surface of a mobile device. The mobile device can be implemented as any type of portable electronic device, such as a mobile communication terminal, smartphone, tablet PC, etc.

[0061] In one embodiment, the optical imaging system may include five lenses. In another embodiment, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side.

[0062] Furthermore, the optical imaging system may include not only five lenses, but also an image sensor configured to convert incident light into an electrical signal, an infrared blocking filter configured to block light incident on the infrared region of the image sensor, and an aperture configured to adjust the amount of light incident on the lenses.

[0063] In one embodiment, the optical imaging system may include lenses formed of a plastic material. In another embodiment, at least one of the first to fifth lenses may be formed of a plastic material, and preferably, all of the first to fifth lenses may be formed of a plastic material.

[0064] In an embodiment, the optical imaging system may include aspherical lenses. In another embodiment, at least one of the first to fifth lenses may be configured as an aspherical lens; for example, two of the first to fifth lenses may be configured as aspherical lenses. Alternatively, all of the first to fifth lenses may be aspherical lenses. At least one of the object-side and image-side surfaces of the one or more aspherical lenses in the first to fifth lenses may be aspherical. For example, the object-side surface of any one of the one or more aspherical lenses in the first to fifth lenses may be aspherical, the image-side surface of any one of the one or more aspherical lenses in the first to fifth lenses may be aspherical, or both the object-side and image-side surfaces of any one of the one or more aspherical lenses in the first to fifth lenses may be aspherical. The aspherical surface of a lens may be represented by Equation 1.

[0065] [Formula 1]

[0066]

[0067] In Equation 1, c is the reciprocal of the radius of curvature of the lens, K is the conic constant, and Y can represent the distance from any point on the aspherical surface of the lens to the optical axis. Furthermore, constants A to H, J, and L to P are aspherical constants of orders 4 to 30, respectively, and Z is the distance along the optical axis between any point on the aspherical surface and the vertex of the aspherical surface.

[0068] In an implementation, the optical imaging system can satisfy the following conditional expression.

[0069] [Conditional Expression 1] TTL / (2×IMG HT)≤0.57

[0070] [Conditional Expression 2] Fno×{TTL / (2×IMG HT)}≤1.4

[0071] [Conditional Expression 3] 80°≤FOV

[0072] [Conditional expression 4] -0.6 <f1 / f2<0

[0073] [Conditional expression 5] -0.1 <f1 / f3<1.0

[0074] [Conditional Expression 6] 0 <v1-v4<45

[0075] In [Conditional Expression] 1, TTL is the distance from the object side of the first lens to the image plane on the optical axis, and IMG HT is half the diagonal length of the image plane (i.e., 2×IMG HT is the diagonal length of the image plane). [Conditional Expression 1] may be related to a configuration in which the optical imaging system according to the embodiment can have a reduced thickness.

[0076] [Conditional Expression 2] is the product of [Conditional Expression 1] and Fno (F-number of the optical imaging system), and [Conditional Expression 2] may be related to a configuration in which the optical imaging system according to the embodiment has an appropriate level of brightness performance (for the front camera) and may have a reduced thickness.

[0077] In [Conditional Expression 3], FOV is the field of view of the optical imaging system, and [Conditional Expression 3] may relate to the configuration in which the optical imaging system according to the embodiment may have an appropriate field of view (for the front camera).

[0078] In [Conditional Expression 4], f1 is the focal length of the first lens, and f2 is the focal length of the second lens. By designing the focal lengths of the first and second lenses to satisfy the range of [Conditional Expression 4], the optical imaging system according to the embodiment can ensure aberration correction performance.

[0079] In [Conditional Expression 5], f1 is the focal length of the first lens, and f3 is the focal length of the third lens. By designing the focal lengths of the first and third lenses to satisfy the range of [Conditional Expression 5], the optical imaging system according to the embodiment can ensure aberration correction performance.

[0080] In [Conditional Expression 6], v1 is the Abbe number of the first lens, and v4 is the Abbe number of the fourth lens. When the first lens and the fourth lens satisfy [Conditional Expression 6], the chromatic aberration of the optical imaging system according to the embodiment can be reduced.

[0081] In implementation, the optical imaging system may also satisfy the following conditional expression.

[0082] [Conditional Expression 7] TTL / f < 1.35

[0083] [Conditional Expression 8] D1 / f < 0.1

[0084] [Conditional Expression 9] 25 <v1-v2<45

[0085] [Conditional expression 10] 0 <f1 / f<1.4

[0086] [Conditional Expression 11]-10 <f2 / f<-1

[0087] [Conditional expression 12] 5 < |f3 / f|

[0088] [Conditional Expression 13] 3 < |f4 / f|

[0089] [Conditional Expression 14]-30 <f5 / f<0

[0090] [Conditional Expression 15] 70° <FOV×(2×IMG HT) / f

[0091] [Conditional expression 16] 0.26 <ET1 / SD1<0.30

[0092] [Conditional expression 17] 0.22 <SD4 / SD10<0.27

[0093] [Conditional Expression 18] CT2 < 0.19

[0094] In [Conditional Expression 7], TTL is the distance along the optical axis from the object-side surface of the first lens to the image plane. In [Conditional Expression 8], D1 is the distance along the optical axis between the image-side surface of the first lens and the object-side surface of the second lens. Furthermore, in both [Conditional Expression 7] and [Conditional Expression 8], f is the focal length of the optical imaging system. [Conditional Expression 7] and [Conditional Expression 8] may be related to the miniaturization of the optical imaging system according to the embodiment.

[0095] In [Conditional Expression 9], v1 is the Abbe number of the first lens, and v2 is the Abbe number of the second lens. [Conditional Expression 9] can be related to the chromatic aberration correction performance of the optical imaging system according to the embodiment.

[0096] In [Conditional Expression 10], f1 is the focal length of the first lens; in [Conditional Expression 11], f2 is the focal length of the second lens; in [Conditional Expression 12], f3 is the focal length of the third lens; in [Conditional Expression 13], f4 is the focal length of the fourth lens; in [Conditional Expression 14], f5 is the focal length of the fifth lens; and in [Conditional Expressions 10] to [Conditional Expressions 14], f is the focal length of the optical imaging system. [Conditional Expressions 10] to [Conditional Expressions 14] may relate to the aberration correction performance of the optical imaging system according to the embodiment.

[0097] In [Conditional Expression 15], FOV is the field of view of the optical imaging system, IMG HT is half the diagonal length of the image plane (i.e., 2 × IMG HT is the diagonal length of the image plane), and f is the focal length of the optical imaging system. [Conditional Expression 15] can be associated with the characteristics of an optical imaging system according to an embodiment having reduced thickness and a suitable field of view (for a front camera).

[0098] In [Conditional Expression 16], ET1 is the thickness of the edge portion of the first lens, and SD1 is the half-aperture of the object-side surface of the first lens. [Conditional Expression 16] may relate to the aberration correction performance of the optical imaging system according to the embodiment.

[0099] In [Conditional Expression 17], SD4 is the half-aperture of the image-side surface of the second lens, SD10 is the half-aperture of the image-side surface of the fifth lens, and CT2 in [Conditional Expression 18] is the center thickness (thickness on the optical axis) of the second lens. [Conditional Expression 17] and [Conditional Expression 18] may be related to the shape conditions of the second lens to ensure the resolution of the optical imaging system according to the embodiment.

[0100] In the following description, an optical imaging system according to an embodiment may be referred to in the accompanying drawings.

[0101] <First Implementation Method>

[0102] Figure 1A This is a configuration diagram showing the optical imaging system according to the first embodiment. Figure 1B It is a graph representing the aberration characteristics of the optical imaging system according to the first embodiment.

[0103] According to the first embodiment, the optical imaging system 100 may include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140 and a fifth lens 150 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 150.

[0104] Furthermore, although not shown in the accompanying drawings, an aperture may be provided between the object side and the image side of the first lens 110, and a spacer may be provided between the second lens 120 and the third lens 130.

[0105] The first lens 110 may have positive refractive power. The focal length of the first lens 110 may be 2.0 mm or greater. The object-side surface of the first lens 110 may be convex in the paraxial region, and the image-side surface of the first lens 110 may be concave in the paraxial region. The first lens 110 may be formed of a plastic material. The Abbe number of the first lens 110 may be 50 or greater. The first lens 110 may be configured as an aspherical lens. For example, the object-side surface and the image-side surface of the first lens 110 may be aspherical.

[0106] The second lens 120 may have negative refractive power. The focal length of the second lens 120 may be -6.0 mm or less. The object-side surface of the second lens 120 may be convex in the paraxial region, and the image-side surface of the second lens 120 may be concave in the paraxial region. The second lens 120 may be formed of a plastic material. For example, the second lens 120 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 110. The Abbe number of the second lens 120 may be less than 20. The second lens 120 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 120 may be aspherical.

[0107] The third lens 130 may have positive refractive power. The focal length of the third lens 130 may be 18.0 mm or greater. The object-side surface of the third lens 130 may be convex in the paraxial region, and the image-side surface of the third lens 130 may be concave in the paraxial region. The third lens 130 may be formed of a plastic material. For example, the third lens 130 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 120. The Abbe number of the third lens 130 may be less than 20. The third lens 130 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 130 may be aspherical.

[0108] The fourth lens 140 may have positive refractive power. The focal length of the fourth lens 140 may be 10.0 mm or greater. The object-side surface of the fourth lens 140 may be concave in the paraxial region, and the image-side surface of the fourth lens 140 may be convex in the paraxial region. The fourth lens 140 may be formed of a plastic material. For example, the fourth lens 140 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 130. The Abbe number of the fourth lens 140 may be 10 or greater, and may be less than the Abbe number of the first lens 110. The fourth lens 140 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 140 may be aspherical.

[0109] The fifth lens 150 may have negative refractive power. The focal length of the fifth lens 150 may be less than -1.0 mm. The object-side surface of the fifth lens 150 may be convex, and the image-side surface may be concave. The fifth lens 150 may be formed of a plastic material. For example, the fifth lens 150 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 140. The Abbe number of the fifth lens 150 may be 50 or greater. The fifth lens 150 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 150 may be aspherical.

[0110] The focal length of the optical imaging system 100 according to the first embodiment can be 2.937 mm, the Fno can be 2.290, the FOV can be 85.480°, and the TTL can be 3.131 mm.

[0111] Table 1 below lists the optical and physical parameters of the optical imaging system 100 according to the first embodiment.

[0112] [Table 1]

[0113] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.259 2 0.916 0.393 1.544 56.00 2.342 0.630 3 2.739 0.072 0.588 4 13.451 0.162 1.671 19.40 -6.430 0.567 5 3.280 0.093 0.504 6 infinity 0.090 7 13.742 0.173 1.671 19.40 33.522 0.581 8 34.513 0.435 0.699 9 -32.519 0.223 1.567 37.40 41.126 1.020 10 -13.666 0.211 1.222 11 1.398 0.423 1.535 55.70 -7.601 1.866 12 0.931 0.193 1.994 13 infinity 0.110 1.517 64.20 14 infinity 0.552 Image plane infinity

[0114] Table 2 below lists the aspherical data of the optical imaging system 100 according to the first embodiment.

[0115] [Table 2]

[0116]

[0117]

[0118] <Second Implementation Method>

[0119] Figure 2A This is a configuration diagram showing the optical imaging system according to the second embodiment. Figure 2BThis is a graph representing the aberration characteristics of the optical imaging system according to the second embodiment.

[0120] According to the second embodiment, the optical imaging system 200 may include a first lens 210, a second lens 220, a third lens 230, a fourth lens 240 and a fifth lens 250 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 250.

[0121] Furthermore, although not shown in the accompanying drawings, an aperture may be provided on the object side of the first lens 210, and a spacer may be provided between the second lens 220 and the third lens 230.

[0122] The first lens 210 may have positive refractive power. The focal length of the first lens 210 may be 2.0 mm or greater. The object-side surface of the first lens 210 may be convex in the paraxial region, and the image-side surface of the first lens 210 may be concave in the paraxial region. The first lens 210 may be formed of a plastic material. The Abbe number of the first lens 210 may be 50 or greater. The first lens 210 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 210 may be aspherical.

[0123] The second lens 220 may have negative refractive power. The focal length of the second lens 220 may be -6.0 mm or less. The object-side surface of the second lens 220 may be convex in the paraxial region, and the image-side surface of the second lens 220 may be concave in the paraxial region. The second lens 220 may be formed of a plastic material. For example, the second lens 220 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 210. The Abbe number of the second lens 220 may be less than 20. The second lens 220 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 220 may be aspherical.

[0124] The third lens 230 may have negative refractive power. The focal length of the third lens 230 may be -40.0 mm or less. The object-side surface of the third lens 230 may be concave in the paraxial region, and the image-side surface of the third lens 230 may be convex in the paraxial region. The third lens 230 may be formed of a plastic material. For example, the third lens 230 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 220. The Abbe number of the third lens 230 may be less than 20. The third lens 230 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 230 may be aspherical.

[0125] The fourth lens 240 may have negative refractive power. The focal length of the fourth lens 240 may be -10.0 mm or less. The object-side surface of the fourth lens 240 may be convex in the paraxial region, and the image-side surface of the fourth lens 240 may be concave in the paraxial region. The fourth lens 240 may be formed of a plastic material. For example, the fourth lens 240 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 230. The Abbe number of the fourth lens 240 may be 10 or greater, and may be less than the Abbe number of the first lens 210. The fourth lens 240 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 240 may be aspherical.

[0126] The fifth lens 250 can have negative refractive power. The focal length of the fifth lens 250 can be less than -1.0 mm. The object-side surface of the fifth lens 250 can be convex, and the image-side surface can be concave. The fifth lens 250 can be formed of a plastic material. For example, the fifth lens 250 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 240. The Abbe number of the fifth lens 250 can be 50 or greater. The fifth lens 250 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 250 can be aspherical.

[0127] The optical imaging system 200 according to the second embodiment may have a focal length of 2.898 mm, an Fno of 2.300, an FOV of 85.897°, and a TTL of 3.150 mm.

[0128] Table 3 below lists the optical and physical parameters of the optical imaging system 200 according to the second embodiment.

[0129] [Table 3]

[0130] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity 0.000 2 0.909 0.387 1.544 56.00 2.176 0.630 3 3.272 0.043 0.594 4 13.713 0.180 1.671 19.40 -6.927 0.570 5 3.483 0.095 0.492 6 infinity 0.100 7 -6.878 0.180 1.671 19.40 -41.515 0.555 8 -9.195 0.394 0.685 9 9.673 0.230 1.651 21.50 -15.352 1.019 10 4.893 0.227 1.235 11 1.133 0.454 1.535 55.70 -74.316 1.939 12 0.947 0.159 2.052 13 infinity 0.110 1.517 64.20 14 infinity 0.590 Image plane infinity

[0131] Table 4 below lists the aspherical data of the optical imaging system 200 according to the second embodiment.

[0132] [Table 4]

[0133]

[0134]

[0135] <Third Implementation Method>

[0136] Figure 3A This is a configuration diagram showing an optical imaging system according to a third embodiment. Figure 3BIt is a graph representing the aberration characteristics of the optical imaging system according to the third embodiment.

[0137] According to the third embodiment, the optical imaging system 300 may include a first lens 310, a second lens 320, a third lens 330, a fourth lens 340 and a fifth lens 350 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 350.

[0138] Furthermore, although not shown in the accompanying drawings, an aperture may be provided on the object side of the first lens 310, and a spacer may be provided between the second lens 320 and the third lens 330.

[0139] The first lens 310 may have positive refractive power. The focal length of the first lens 310 may be 2.0 mm or greater. The object-side surface of the first lens 310 may be convex in the paraxial region, and the image-side surface of the first lens 310 may be concave in the paraxial region. The first lens 310 may be formed of a plastic material. The Abbe number of the first lens 310 may be 50 or greater. The first lens 310 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 310 may be aspherical.

[0140] The second lens 320 may have negative refractive power. The focal length of the second lens 320 may be -6.0 mm or less. The object-side surface of the second lens 320 may be convex in the paraxial region, and the image-side surface of the second lens 320 may be concave in the paraxial region. The second lens 320 may be formed of a plastic material. For example, the second lens 320 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 310. The Abbe number of the second lens 320 may be less than 20. The second lens 320 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 320 may be aspherical.

[0141] The third lens 330 may have negative refractive power. The focal length of the third lens 330 may be -40.0 mm or less. The object-side surface of the third lens 330 may be concave in the paraxial region, and the image-side surface of the third lens 330 may be convex in the paraxial region. The third lens 330 may be formed of a plastic material. For example, the third lens 330 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 320. The Abbe number of the third lens 330 may be less than 20. The third lens 330 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 330 may be aspherical.

[0142] The fourth lens 340 may have positive refractive power. The focal length of the fourth lens 340 may be 10.0 mm or greater. The object-side surface of the fourth lens 340 may be concave in the paraxial region, and the image-side surface of the fourth lens 340 may be convex in the paraxial region. The fourth lens 340 may be formed of a plastic material. For example, the fourth lens 340 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 330. The Abbe number of the fourth lens 340 may be 10 or greater, and may be less than the Abbe number of the first lens 310. The fourth lens 340 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 340 may be aspherical.

[0143] The fifth lens 350 can have negative refractive power. The focal length of the fifth lens 350 can be less than -1.0 mm. The object-side surface of the fifth lens 350 can be convex, and the image-side surface can be concave. The fifth lens 350 can be formed of a plastic material. For example, the fifth lens 350 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 340. The Abbe number of the fifth lens 350 can be 50 or greater. The fifth lens 350 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 350 can be aspherical.

[0144] The optical imaging system 300 according to the third embodiment may have a focal length of 2.927 mm, an Fno of 2.320, an FOV of 85.480°, and a TTL of 3.150 mm.

[0145] Table 5 below lists the optical and physical parameters of the optical imaging system 300 according to the third embodiment.

[0146] [Table 5]

[0147]

[0148]

[0149] Table 6 below lists the aspherical data of the optical imaging system 300 according to the third embodiment.

[0150] [Table 6]

[0151]

[0152]

[0153] <Fourth Implementation Method>

[0154] Figure 4AThis is a configuration diagram showing an optical imaging system according to a fourth embodiment. Figure 4B It is a graph showing the aberration characteristics of the optical imaging system according to the fourth embodiment.

[0155] According to the fourth embodiment, the optical imaging system 400 may include a first lens 410, a second lens 420, a third lens 430, a fourth lens 440 and a fifth lens 450 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 450.

[0156] In addition, an aperture can be provided between the object side and the image side of the first lens 410, and a spacer can be provided between the second lens 420 and the third lens 430.

[0157] The first lens 410 may have positive refractive power. The focal length of the first lens 410 may be 2.0 mm or greater. The object-side surface of the first lens 410 may be convex in the paraxial region, and the image-side surface of the first lens 410 may be concave in the paraxial region. The first lens 410 may be formed of a plastic material. The Abbe number of the first lens 410 may be 50 or greater. The first lens 410 may be configured as an aspherical lens. For example, the object-side surface and the image-side surface of the first lens 410 may be aspherical.

[0158] The second lens 420 may have negative refractive power. The focal length of the second lens 420 may be -6.0 mm or less. The object-side and image-side surfaces of the second lens 420 may be concave in the paraxial region. The second lens 420 may be formed of a plastic material. For example, the second lens 420 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 410. The Abbe number of the second lens 420 may be less than 20. The second lens 420 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the second lens 420 may be aspherical.

[0159] The third lens 430 may have positive refractive power. The focal length of the third lens 430 may be 18.0 mm or greater. The object-side surface of the third lens 430 may be convex in the paraxial region, and the image-side surface of the third lens 430 may be concave in the paraxial region. The third lens 430 may be formed of a plastic material. For example, the third lens 430 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 420. The Abbe number of the third lens 430 may be less than 20. The third lens 430 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 430 may be aspherical.

[0160] The fourth lens 440 may have positive refractive power. The focal length of the fourth lens 440 may be 10.0 mm or greater. The object-side surface of the fourth lens 440 may be concave in the paraxial region, and the image-side surface of the fourth lens 440 may be convex in the paraxial region. The fourth lens 440 may be formed of a plastic material. For example, the fourth lens 440 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 430. The Abbe number of the fourth lens 440 may be 10 or greater, and may be less than the Abbe number of the first lens 410. The fourth lens 440 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 440 may be aspherical.

[0161] The fifth lens 450 may have negative refractive power. The focal length of the fifth lens 450 may be less than -1.0 mm. The object-side surface of the fifth lens 450 may be convex, and the image-side surface may be concave. The fifth lens 450 may be formed of a plastic material. For example, the fifth lens 450 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 440. The Abbe number of the fifth lens 450 may be 50 or greater. The fifth lens 450 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 450 may be aspherical.

[0162] The optical imaging system 400 according to the fourth embodiment may have a focal length of 2.927 mm, an Fno of 2.282, an FOV of 85.479°, and a TTL of 3.060 mm.

[0163] Table 7 below lists the optical and physical parameters of the optical imaging system 400 according to the fourth embodiment.

[0164] [Table 7]

[0165] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.251 2 0.872 0.409 1.544 56.00 2.317 0.641 3 2.339 0.077 0.584 4 -72.247 0.151 1.671 19.40 -6.445 0.562 5 4.661 0.090 0.504 6 infinity 0.067 7 10.235 0.176 1.671 19.40 23.722 0.579 8 27.889 0.420 0.718 9 -21.922 0.210 1.567 37.40 26.285 0.981 10 -8.938 0.234 1.166 11 1.564 0.383 1.535 55.70 -5.724 1.813 12 0.948 0.224 1.972 13 infinity 0.110 1.517 64.20 14 infinity 0.509 Image plane infinity

[0166] Table 8 below lists the aspherical data of the optical imaging system 400 according to the fourth embodiment.

[0167] [Table 8]

[0168]

[0169]

[0170] <Fifth Implementation Method>

[0171] Figure 5A This is a configuration diagram showing an optical imaging system according to a fifth embodiment. Figure 5BThis is a graph representing the aberration characteristics of the optical imaging system according to the fifth embodiment.

[0172] According to the fifth embodiment, the optical imaging system 500 may include a first lens 510, a second lens 520, a third lens 530, a fourth lens 540 and a fifth lens 550 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 550.

[0173] In addition, an aperture can be provided between the object side and the image side of the first lens 510, and a spacer can be provided between the second lens 520 and the third lens 530.

[0174] The first lens 510 may have positive refractive power. The focal length of the first lens 510 may be 2.0 mm or greater. The object-side surface of the first lens 510 may be convex in the paraxial region, and the image-side surface of the first lens 510 may be concave in the paraxial region. The first lens 510 may be formed of a plastic material. The Abbe number of the first lens 510 may be 50 or greater. The first lens 510 may be configured as an aspherical lens. For example, the object-side surface and the image-side surface of the first lens 510 may be aspherical.

[0175] The second lens 520 may have negative refractive power. The focal length of the second lens 520 may be -6.0 mm or less. The object-side and image-side surfaces of the second lens 520 may be concave in the paraxial region. The second lens 520 may be formed of a plastic material. For example, the second lens 520 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 510. The Abbe number of the second lens 520 may be less than 20. The second lens 520 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the second lens 520 may be aspherical.

[0176] The third lens 530 may have positive refractive power. The focal length of the third lens 530 may be 18.0 mm or greater. The object-side surface of the third lens 530 may be convex in the paraxial region, and the image-side surface of the third lens 530 may be concave in the paraxial region. The third lens 530 may be formed of a plastic material. For example, the third lens 530 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 520. The Abbe number of the third lens 530 may be less than 20. The third lens 530 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 530 may be aspherical.

[0177] The fourth lens 540 may have positive refractive power. The focal length of the fourth lens 540 may be 10.0 mm or greater. The object-side surface of the fourth lens 540 may be concave in the paraxial region, and the image-side surface of the fourth lens 540 may be convex in the paraxial region. The fourth lens 540 may be formed of a plastic material. For example, the fourth lens 540 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 530. The Abbe number of the fourth lens 540 may be 10 or greater, and may be less than the Abbe number of the first lens 510. The fourth lens 540 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 540 may be aspherical.

[0178] The fifth lens 550 can have negative refractive power. The focal length of the fifth lens 550 can be less than -1.0 mm. The object-side surface of the fifth lens 550 can be convex, and the image-side surface can be concave. The fifth lens 550 can be formed of a plastic material. For example, the fifth lens 550 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 540. The Abbe number of the fifth lens 550 can be 50 or greater. The fifth lens 550 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 550 can be aspherical.

[0179] The optical imaging system 500 according to the fifth embodiment may have a focal length of 2.927 mm, an Fno of 2.289, an FOV of 85.498°, and a TTL of 3.050 mm.

[0180] Table 9 below lists the optical and physical parameters of the optical imaging system 500 according to the fifth embodiment.

[0181] [Table 9]

[0182] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.251 2 0.869 0.408 1.544 56.00 2.309 0.639 3 2.328 0.078 0.584 4 -61.781 0.152 1.671 19.40 -6.222 0.562 5 4.539 0.087 0.502 6 infinity 0.064 7 7.325 0.172 1.671 19.40 21.029 0.599 8 14.901 0.452 0.716 9 -16.287 0.210 1.567 37.40 25.039 0.979 10 -7.647 0.233 1.159 11 1.594 0.384 1.535 55.70 -5.504 1.831 12 0.948 0.223 1.972 13 infinity 0.110 1.517 64.20 14 infinity 0.509 Image plane infinity

[0183] Table 10 below lists the aspherical data of the optical imaging system 500 according to the fifth embodiment.

[0184] [Table 10]

[0185]

[0186]

[0187] <Sixth Implementation Method>

[0188] Figure 6A This is a configuration diagram showing the optical imaging system according to the sixth embodiment. Figure 6BThis is a graph representing the aberration characteristics of the optical imaging system according to the sixth embodiment.

[0189] According to the sixth embodiment, the optical imaging system 600 may include a first lens 610, a second lens 620, a third lens 630, a fourth lens 640 and a fifth lens 650 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 650.

[0190] In addition, an aperture can be provided between the object side and the image side of the first lens 610, and a spacer can be provided between the second lens 620 and the third lens 630.

[0191] The first lens 610 may have positive refractive power. The focal length of the first lens 610 may be 2.0 mm or greater. The object-side surface of the first lens 610 may be convex in the paraxial region, and the image-side surface of the first lens 610 may be concave in the paraxial region. The first lens 610 may be formed of a plastic material. The Abbe number of the first lens 610 may be 50 or greater. The first lens 610 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 610 may be aspherical.

[0192] The second lens 620 may have negative refractive power. The focal length of the second lens 620 may be -6.0 mm or less. The object-side and image-side surfaces of the second lens 620 may be concave in the paraxial region. The second lens 620 may be formed of a plastic material. For example, the second lens 620 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 610. The Abbe number of the second lens 620 may be less than 20. The second lens 620 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the second lens 620 may be aspherical.

[0193] The third lens 630 may have positive refractive power. The focal length of the third lens 630 may be 18.0 mm or greater. The object-side surface of the third lens 630 may be convex in the paraxial region, and the image-side surface of the third lens 630 may be concave in the paraxial region. The third lens 630 may be formed of a plastic material. For example, the third lens 630 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 620. The Abbe number of the third lens 630 may be less than 20. The third lens 630 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 630 may be aspherical.

[0194] The fourth lens 640 may have positive refractive power. The focal length of the fourth lens 640 may be 10.0 mm or greater. The object-side surface of the fourth lens 640 may be concave in the paraxial region, and the image-side surface of the fourth lens 640 may be convex in the paraxial region. The fourth lens 640 may be formed of a plastic material. For example, the fourth lens 640 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 630. The Abbe number of the fourth lens 640 may be 10 or greater, and may be less than the Abbe number of the first lens 610. The fourth lens 640 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 640 may be aspherical.

[0195] The fifth lens 650 can have negative refractive power. The focal length of the fifth lens 650 can be less than -1.0 mm. The object-side surface of the fifth lens 650 can be convex, and the image-side surface can be concave. The fifth lens 650 can be formed of a plastic material. For example, the fifth lens 650 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 640. The Abbe number of the fifth lens 650 can be 50 or greater. The fifth lens 650 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 650 can be aspherical.

[0196] The optical imaging system 600 according to the sixth embodiment may have a focal length of 2.927 mm, an Fno of 2.289, an FOV of 85.499°, and a TTL of 3.040 mm.

[0197] Table 11 below lists the optical and physical parameters of the optical imaging system 600 according to the sixth embodiment.

[0198] [Table 11]

[0199]

[0200]

[0201] Table 12 below lists the aspherical data of the optical imaging system 600 according to the sixth embodiment.

[0202] [Table 12]

[0203]

[0204]

[0205] <Seventh Implementation Method>

[0206] Figure 7AThis is a configuration diagram showing the optical imaging system according to the seventh embodiment. Figure 7B This is a graph representing the aberration characteristics of the optical imaging system according to the seventh embodiment.

[0207] According to the seventh embodiment, the optical imaging system 700 may include a first lens 710, a second lens 720, a third lens 730, a fourth lens 740 and a fifth lens 750 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 750.

[0208] Furthermore, an aperture can be provided between the object side and the image side of the first lens 710, and a spacer can be provided between the second lens 720 and the third lens 730.

[0209] The first lens 710 may have positive refractive power. The focal length of the first lens 710 may be 2.0 mm or greater. The object-side surface of the first lens 710 may be convex in the paraxial region, and the image-side surface of the first lens 710 may be concave in the paraxial region. The first lens 710 may be formed of a plastic material. The Abbe number of the first lens 710 may be 50 or greater. The first lens 710 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 710 may be aspherical.

[0210] The second lens 720 may have negative refractive power. The focal length of the second lens 720 may be -6.0 mm or less. The object-side and image-side surfaces of the second lens 720 may be concave in the paraxial region. The second lens 720 may be formed of a plastic material. For example, the second lens 720 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 710. The Abbe number of the second lens 720 may be less than 20. The second lens 720 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the second lens 720 may be aspherical.

[0211] The third lens 730 may have positive refractive power. The focal length of the third lens 730 may be 18.0 mm or greater. The object-side and image-side surfaces of the third lens 730 may be convex in the paraxial region. The third lens 730 may be formed of a plastic material. For example, the third lens 730 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 720. The Abbe number of the third lens 730 may be less than 20. The third lens 730 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the third lens 730 may be aspherical.

[0212] The fourth lens 740 may have positive refractive power. The focal length of the fourth lens 740 may be 10.0 mm or greater. The object-side surface of the fourth lens 740 may be concave in the paraxial region, and the image-side surface of the fourth lens 740 may be convex in the paraxial region. The fourth lens 740 may be formed of a plastic material. For example, the fourth lens 740 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 730. The Abbe number of the fourth lens 740 may be 10 or greater, and may be less than the Abbe number of the first lens 710. The fourth lens 740 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 740 may be aspherical.

[0213] The fifth lens 750 can have negative refractive power. The focal length of the fifth lens 750 can be less than -1.0 mm. The object-side surface of the fifth lens 750 can be convex, and the image-side surface can be concave. The fifth lens 750 can be formed of a plastic material. For example, the fifth lens 750 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 740. The Abbe number of the fifth lens 750 can be 50 or greater. The fifth lens 750 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 750 can be aspherical.

[0214] The optical imaging system 700 according to the seventh embodiment may have a focal length of 2.915 mm, an Fno of 2.289, an FOV of 85.496°, and a TTL of 3.090 mm.

[0215] Table 13 below lists the optical and physical parameters of the optical imaging system 700 according to the seventh embodiment.

[0216] [Table 13]

[0217] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.255 2 0.887 0.396 1.544 56.00 2.322 0.637 3 2.479 0.073 0.589 4 -577.991 0.162 1.671 19.40 -6.861 0.566 5 4.696 0.086 0.502 6 infinity 0.074 7 24.929 0.180 1.671 19.40 29.931 0.550 8 -109.584 0.435 0.677 9 -78.663 0.214 1.567 37.40 18.480 0.974 10 -9.310 0.262 1.159 11 1.661 0.376 1.535 55.70 -5.147 1.865 12 0.955 0.182 1.993 13 infinity 0.110 1.517 64.20 14 infinity 0.539 Image plane infinity

[0218] Table 14 below lists the aspherical data of the optical imaging system 700 according to the seventh embodiment.

[0219] [Table 14]

[0220]

[0221]

[0222] <Eighth Implementation Method>

[0223] Figure 8A This is a configuration diagram showing the optical imaging system according to the eighth embodiment. Figure 8BIt is a graph showing the aberration characteristics of the optical imaging system according to the eighth embodiment.

[0224] According to the eighth embodiment, the optical imaging system 800 may include a first lens 810, a second lens 820, a third lens 830, a fourth lens 840 and a fifth lens 850 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 850.

[0225] In addition, an aperture can be provided between the object side and the image side of the first lens 810, and a spacer can be provided between the second lens 820 and the third lens 830.

[0226] The first lens 810 may have positive refractive power. The focal length of the first lens 810 may be 2.0 mm or greater. The object-side surface of the first lens 810 may be convex in the paraxial region, and the image-side surface of the first lens 810 may be concave in the paraxial region. The first lens 810 may be formed of a plastic material. The Abbe number of the first lens 810 may be 50 or greater. The first lens 810 may be configured as an aspherical lens. For example, the object-side surface and the image-side surface of the first lens 810 may be aspherical.

[0227] The second lens 820 may have negative refractive power. The focal length of the second lens 820 may be -6.0 mm or less. The object-side surface of the second lens 820 may be convex in the paraxial region, and the image-side surface of the second lens 820 may be concave in the paraxial region. The second lens 820 may be formed of a plastic material. For example, the second lens 820 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 810. The Abbe number of the second lens 820 may be less than 20. The second lens 820 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 820 may be aspherical.

[0228] The third lens 830 may have positive refractive power. The focal length of the third lens 830 may be 18.0 mm or greater. The object-side surface of the third lens 830 may be convex in the paraxial region, and the image-side surface of the third lens 830 may be concave in the paraxial region. The third lens 830 may be formed of a plastic material. For example, the third lens 830 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 820. The Abbe number of the third lens 830 may be less than 20. The third lens 830 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 830 may be aspherical.

[0229] The fourth lens 840 may have positive refractive power. The focal length of the fourth lens 840 may be 10.0 mm or greater. The object-side and image-side surfaces of the fourth lens 840 may be convex in the paraxial region. The fourth lens 840 may be formed of a plastic material. For example, the fourth lens 840 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 830. The Abbe number of the fourth lens 840 may be 10 or greater, and may be less than the Abbe number of the first lens 810. The fourth lens 840 may be configured as an aspherical lens. For example, the object-side and image-side surfaces of the fourth lens 840 may be aspherical.

[0230] The fifth lens 850 can have negative refractive power. The focal length of the fifth lens 850 can be less than -1.0 mm. The object-side surface of the fifth lens 850 can be convex, and the image-side surface can be concave. The fifth lens 850 can be formed of a plastic material. For example, the fifth lens 850 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 840. The Abbe number of the fifth lens 850 can be 50 or greater. The fifth lens 850 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 850 can be aspherical.

[0231] The optical imaging system 800 according to the eighth embodiment may have a focal length of 2.927 mm, an Fno of 2.290, an FOV of 85.488°, and a TTL of 3.060 mm.

[0232] Table 15 below lists the optical and physical parameters of the optical imaging system 800 according to the eighth embodiment.

[0233] [Table 15]

[0234] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.255 2 0.893 0.397 1.544 56.00 2.341 0.639 3 2.492 0.068 0.593 4 26.971 0.170 1.671 19.40 -7.005 0.570 5 4.033 0.094 0.501 6 infinity 0.081 7 18.351 0.175 1.671 19.40 34.958 0.568 8 80.610 0.435 0.693 9 14.860 0.210 1.567 37.40 12.650 1.014 10 -13.971 0.273 1.193 11 1.811 0.352 1.535 55.70 -4.399 1.828 12 0.955 0.182 1.973 13 infinity 0.110 1.517 64.20 14 infinity 0.514 Image plane infinity

[0235] Table 16 below lists the aspherical data of the optical imaging system 800 according to the eighth embodiment.

[0236] [Table 16]

[0237] Face number 2 3 4 5 7 K -1.70E-01 9.60E+00 0.00E+00 -4.32E+00 0.00E+00 A 2.92E-01 -3.69E-01 -3.99E-01 -2.23E-01 -8.55E-01 B -2.46E+01 8.43E+00 1.88E+01 -1.76E+01 1.08E+01 C 8.86E+02 -5.45E+02 -7.89E+02 2.18E+03 -4.32E+02 D -1.80E+04 1.66E+04 1.85E+04 -9.51E+04 1.22E+04 E 2.36E+05 -3.09E+05 -2.61E+05 2.40E+06 -2.35E+05 F -2.13E+06 3.79E+06 2.34E+06 -3.97E+07 3.13E+06 G 1.37E+07 -3.23E+07 -1.30E+07 4.52E+08 -2.97E+07 H -6.34E+07 1.94E+08 3.878E+07 -3.65E+09 2.02E+08 J 2.13E+08 -8.27E+08 1.96E+07 2.10E+10 -9.87E+08 L -5.16E+08 2.50E+09 -6.58E+08 -8.59E+10 3.43E+09 M 8.72E+08 -5.19E+09 2.79E+09 2.44E+11 -8.26E+09 N -9.77E+08 7.10E+09 -6.07E+09 -4.57E+11 1.31E+10 O 6.52E+08 -5.72E+09 7.07E+09 5.07E+11 -1.23E+10 P -1.96E+08 2.06E+09 -3.49E+09 -2.53E+11 5.15E+09 Face number 8 9 10 11 12 K 0.00E+00 0.00E+00 0.00E+00 -8.05E-01 -3.33E+00 A -4.13E-01 -4.11E-01 -9.86E-01 -1.86E+00 -1.21E+00 B -1.09E+01 -2.11E+00 6.58E+00 4.28E+00 3.16E+00 C 3.73E+02 6.91E+01 -4.95E+01 -8.55E+00 -6.68E+00 D -7.00E+03 -8.81E+02 3.01E+02 1.53E+01 1.08E+01 E 8.36E+04 6.61E+03 -1.30E+03 -2.15E+01 -1.31E+01 F -6.74E+05 -3.25E+04 3.88E+03 2.20E+01 1.17E+01 G 3.80E+06 1.09E+05 -8.19E+03 -1.62E+01 -7.80E+00 H -1.53E+07 -2.55E+05 1.23E+04 8.68E+00 3.84E+00 J 4.38E+07 4.20E+05 -1.32E+04 -3.36E+00 -1.39E+00 L -8.95E+07 -4.84E+05 1.01E+04 9.26E-01 3.62E-01 M 1.27E+08 3.81E+05 -5.29E+03 -1.78E-01 -6.65E-02 N -1.18E+08 -1.95E+05 1.82E+03 2.25E-02 8.12E-03 O 6.49E+07 5.84E+04 -3.70E+02 -1.69E-03 -5.93E-04 P -1.60E+07 -7.79E+03 3.36E+01 5.68E-05 1.96E-05

[0238] <Ninth Implementation Method>

[0239] Figure 9A This is a configuration diagram showing an optical imaging system according to the ninth embodiment. Figure 9B This is a graph representing the aberration characteristics of the optical imaging system according to the ninth embodiment.

[0240] According to the ninth embodiment, the optical imaging system 900 may include a first lens 910, a second lens 920, a third lens 930, a fourth lens 940 and a fifth lens 950 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 950.

[0241] Furthermore, although not shown in the accompanying drawings, an aperture may be provided between the object side and the image side of the first lens 910, and a spacer may be provided between the second lens 920 and the third lens 930.

[0242] The first lens 910 may have positive refractive power. The focal length of the first lens 910 may be 2.0 mm or greater. The object-side surface of the first lens 910 may be convex in the paraxial region, and the image-side surface of the first lens 910 may be concave in the paraxial region. The first lens 910 may be formed of a plastic material. The Abbe number of the first lens 910 may be 50 or greater. The first lens 910 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 910 may be aspherical.

[0243] The second lens 920 may have negative refractive power. The focal length of the second lens 920 may be -6.0 mm or less. The object-side surface of the second lens 920 may be convex in the paraxial region, and the image-side surface of the second lens 920 may be concave in the paraxial region. The second lens 920 may be formed of a plastic material. For example, the second lens 920 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 910. The Abbe number of the second lens 920 may be less than 20. The second lens 920 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 920 may be aspherical.

[0244] The third lens 930 may have positive refractive power. The focal length of the third lens 930 may be 18.0 mm or greater. The object-side surface of the third lens 930 may be convex in the paraxial region, and the image-side surface of the third lens 930 may be concave in the paraxial region. The third lens 930 may be formed of a plastic material. For example, the third lens 930 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 920. The Abbe number of the third lens 930 may be less than 20. The third lens 930 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 930 may be aspherical.

[0245] The fourth lens 940 may have positive refractive power. The focal length of the fourth lens 940 may be 10.0 mm or greater. The object-side surface of the fourth lens 940 may be concave in the paraxial region, and the image-side surface of the fourth lens 940 may be convex in the paraxial region. The fourth lens 940 may be formed of a plastic material. For example, the fourth lens 940 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 930. The Abbe number of the fourth lens 940 may be 10 or greater, and may be less than the Abbe number of the first lens 910. The fourth lens 940 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 940 may be aspherical.

[0246] The fifth lens 950 can have negative refractive power. The focal length of the fifth lens 950 can be less than -1.0 mm. The object-side surface of the fifth lens 950 can be convex, and the image-side surface can be concave. The fifth lens 950 can be formed of a plastic material. For example, the fifth lens 950 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 940. The Abbe number of the fifth lens 950 can be 50 or greater. The fifth lens 950 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 950 can be aspherical.

[0247] The focal length of the optical imaging system 900 according to the ninth embodiment can be 2.937 mm, Fno can be 2.288, FOV can be 85.487°, and TTL can be 3.110 mm.

[0248] Table 17 below lists the optical and physical parameters of the optical imaging system 900 according to the ninth embodiment.

[0249] [Table 17]

[0250]

[0251]

[0252] Table 18 below lists the aspherical data of the optical imaging system 900 according to the ninth embodiment.

[0253] [Table 18]

[0254]

[0255]

[0256] <Tenth Implementation Method>

[0257] Figure 10AThis is a configuration diagram showing an optical imaging system according to the tenth embodiment. Figure 10B This is a graph showing the aberration characteristics of the optical imaging system according to the tenth embodiment.

[0258] According to the tenth embodiment, the optical imaging system 1000 may include a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040 and a fifth lens 1050 arranged sequentially from the object side, and may also include an infrared blocking filter F and an image sensor IP disposed on the image side of the fifth lens 1050.

[0259] Furthermore, although not shown in the accompanying drawings, an aperture can be provided between the object side and the image side of the first lens 1010, and a spacer can be provided between the second lens 1020 and the third lens 1030.

[0260] The first lens 1010 may have positive refractive power. The focal length of the first lens 1010 may be 2.0 mm or greater. The object-side surface of the first lens 1010 may be convex in the paraxial region, and the image-side surface of the first lens 1010 may be concave in the paraxial region. The first lens 1010 may be formed of a plastic material. The Abbe number of the first lens 1010 may be 50 or greater. The first lens 1010 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the first lens 1010 may be aspherical.

[0261] The second lens 1020 may have negative refractive power. The focal length of the second lens 1020 may be -6.0 mm or less. The object-side surface of the second lens 1020 may be convex in the paraxial region, and the image-side surface of the second lens 1020 may be concave in the paraxial region. The second lens 1020 may be formed of a plastic material. For example, the second lens 1020 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the first lens 1010. The Abbe number of the second lens 1020 may be less than 20. The second lens 1020 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 1020 may be aspherical.

[0262] The third lens 1030 may have positive refractive power. The focal length of the third lens 1030 may be 18.0 mm or greater. The object-side surface of the third lens 1030 may be convex in the paraxial region, and the image-side surface of the third lens 1030 may be concave in the paraxial region. The third lens 1030 may be formed of a plastic material. For example, the third lens 1030 may be formed of a plastic material having the same optical properties (e.g., refractive index and Abbe number) as the second lens 1020. The Abbe number of the third lens 1030 may be less than 20. The third lens 1030 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 1030 may be aspherical.

[0263] The fourth lens 1040 may have positive refractive power. The focal length of the fourth lens 1040 may be 10.0 mm or greater. The object-side surface of the fourth lens 1040 may be concave in the paraxial region, and the image-side surface of the fourth lens 1040 may be convex in the paraxial region. The fourth lens 1040 may be formed of a plastic material. For example, the fourth lens 1040 may be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the third lens 1030. The Abbe number of the fourth lens 1040 may be 10 or greater, and may be less than the Abbe number of the first lens 1010. The fourth lens 1040 may be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 1040 may be aspherical.

[0264] The fifth lens 1050 can have negative refractive power. The focal length of the fifth lens 1050 can be less than -1.0 mm. The object-side surface of the fifth lens 1050 can be convex, and the image-side surface can be concave. The fifth lens 1050 can be formed of a plastic material. For example, the fifth lens 1050 can be formed of a plastic material having optical properties (e.g., refractive index and Abbe number) different from those of the fourth lens 1040. The Abbe number of the fifth lens 1050 can be 50 or greater. The fifth lens 1050 can be configured as an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 1050 can be aspherical.

[0265] According to the tenth embodiment, the focal length of the optical imaging system 1000 can be 2.929 mm, the Fno can be 2.297, the FOV can be 85.100°, and the TTL can be 3.110 mm.

[0266] Table 19 below lists the optical and physical parameters of the optical imaging system 1000 according to the tenth embodiment.

[0267] [Table 19]

[0268] Face number radius of curvature Thickness / Distance Refractive index Abbe number focal length Effective radius object infinity infinity 1 infinity -0.265 2 0.900 0.398 1.544 56.00 2.311 0.645 3 2.648 0.068 0.594 4 15.741 0.163 1.671 19.40 -6.443 0.573 5 3.408 0.094 0.506 6 infinity 0.090 7 12.009 0.173 1.671 19.40 29.563 0.603 8 29.724 0.435 0.722 9 -45.055 0.223 1.567 37.40 45.903 1.032 10 -16.596 0.223 1.238 11 1.415 0.392 1.535 55.70 -6.660 1.833 12 0.916 0.147 1.965 13 infinity 0.110 1.517 64.20 14 infinity 0.593 Image plane infinity

[0269] Table 20 below lists the aspherical data of the optical imaging system 1000 according to the tenth embodiment.

[0270] [Table 20]

[0271]

[0272]

[0273] Table 21 below lists the values ​​of optical and physical parameters related to the conditional expression of the optical imaging system according to the embodiment.

[0274] [Table 21]

[0275]

[0276]

[0277] According to the aforementioned embodiments, the optical imaging system can be thin.

[0278] While specific examples have been shown and described above, it will be apparent upon understanding this disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered descriptive only and not for limiting purposes. The description of features or aspects in each example is to be applied to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in a different manner and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents shall be construed as included in this disclosure.

Claims

1. An optical imaging system, comprising: The first lens, second lens, third lens, fourth lens, and fifth lens are arranged sequentially from the object side. The optical imaging system comprises a total of five lenses with refractive power. Among them, the condition TTL / (2×IMG HT)≤0.57 is satisfied. Wherein, TTL is the distance along the optical axis from the object side of the first lens to the image plane, and IMG HT is half the diagonal length of the image plane.

2. The optical imaging system according to claim 1, wherein, The condition expression -0.1 is satisfied. <f1 / f3<1.0, Where f1 is the focal length of the first lens and f3 is the focal length of the third lens.

3. The optical imaging system according to claim 1, wherein, The condition expression -0.6 is satisfied. <f1 / f2<0, Where f1 is the focal length of the first lens and f2 is the focal length of the second lens.

4. The optical imaging system according to claim 1, wherein, The object-side surface of the second lens is concave.

5. The optical imaging system according to claim 1, wherein, The condition expression 0 is satisfied <v1-v4<45, Wherein, v1 is the Abbe number of the first lens, and v4 is the Abbe number of the fourth lens.

6. The optical imaging system according to claim 1, wherein, The condition expression 70° is satisfied <FOV×(2×IMGHT) / f, Wherein, FOV is the field of view of the optical imaging system, and f is the focal length of the optical imaging system.

7. The optical imaging system according to claim 1, wherein, The object-side surface of the fourth lens is convex.

8. The optical imaging system according to claim 1, wherein, The image-side surface of the third lens is convex.

9. The optical imaging system according to claim 1, wherein, The conditional expression Fno×{TTL / (2×IMGHT)}≤1.4 is satisfied. Wherein, Fno is the F-number of the optical imaging system.

10. An optical imaging system, comprising: The first lens has positive refractive power; The second lens has negative refractive power; The third lens has refractive power; The fourth lens has refractive power; as well as The fifth lens has negative refractive power. The first lens to the fifth lens are arranged sequentially from the object side. The optical imaging system comprises a total of five lenses with refractive power. Among them, the conditional expression -0.1 is satisfied. <f1 / f3<1.0, Where f1 is the focal length of the first lens and f3 is the focal length of the third lens.

11. The optical imaging system according to claim 10, in, The image-side surface of the first lens is concave, and Among them, the conditional expression D1 / f < 0.1 is satisfied. Wherein, D1 is the distance on the optical axis between the image side of the first lens and the object side of the second lens, and f is the focal length of the optical imaging system.

12. The optical imaging system according to claim 10, wherein, The object-side surface of the second lens is concave.

13. The optical imaging system according to claim 10, wherein, The conditional expression 80° ≤ FOV must be satisfied. Wherein, FOV is the field of view of the optical imaging system.

14. The optical imaging system according to claim 10, wherein, The condition TTL / (2×IMG HT) ≤ 0.57 is satisfied. Wherein, TTL is the distance from the object side of the first lens to the image plane on the optical axis, and IMG HT is half the diagonal length of the image plane.

15. The optical imaging system according to claim 10, wherein, The third lens has negative refractive power and a concave object-side surface.

16. The optical imaging system according to claim 10, wherein, The conditional expression 3 < |f4 / f| is satisfied. Where f4 is the focal length of the fourth lens, and f is the focal length of the optical imaging system.

Images