Optical image capturing system

Abstract

The utility model relates to an optical imaging system. The optical imaging system includes: a first lens having refractive power; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having positive refractive power; and a fifth lens having negative refractive power. The first lens to the fifth lens are sequentially arranged from the object side, and the requirement of 3.10 lt is met; f / IMG HTlt; 3.15 where f is the focal length of the optical imaging system and IMG HT is half the diagonal length of the imaging plane.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority of Korean Patent Application No. 10 - 2023 - 0191799, filed with the Korean Intellectual Property Office on December 26, 2023, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

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

[0004] Previously, a thin mobile device including a camera with a medium magnification (e.g., 2.5 to 3.5 magnifications), which was implemented as a direct - type system, is now implemented as a foldable one. However, since a camera with a medium magnification typically uses a high - pixel image sensor having a large number of pixels, there may be a problem that the focal length and the overall length inevitably increase.

[0005] 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 with respect to the present disclosure. Summary of the utility model

[0006] The present summary is provided to introduce a selection of concepts in a simplified form, which are further described below in the detailed description. The present summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to assist in determining the scope of the claimed subject matter.

[0007] In one general aspect, an optical imaging system includes: a first lens having a refractive power; a second lens having a negative refractive power; a third lens having a refractive power; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power. The first lens to the fifth lens are arranged in order from the object side, where 3.10 < f / IMG HT < 3.15 is satisfied, where f is the focal length of the optical imaging system, and IMG HT is half of the diagonal length of the imaging surface.

[0008] 3.7 ≤ TTL / ΣCTn (n = 1, 2, 3) ≤ 4.3 can be satisfied, where TTL is the distance on the optical axis from the object surface of the first lens to the imaging surface, and ΣCTn (n = 1, 2, 3) is the sum of the thicknesses of the first lens to the third lens on the optical axis.

[0009] The first lens may have a convex image surface. And 0.2 ≤ R1 / f ≤ 0.3 can be satisfied, where R1 is the radius of curvature of the object surface of the first lens.

[0010] It can satisfy -2.5 < f / f2 + f / f3 < -1.5, where f2 is the focal length of the second lens and f3 is the focal length of the third lens.

[0011] It can satisfy 2.0 < TTL / f1 ≤ 2.5, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, and f1 is the focal length of the first lens.

[0012] The third lens can have a positive refractive power and a convex object side surface.

[0013] It can satisfy 2.15 < f / BFL < 2.60, where BFL is the distance on the optical axis from the image side surface of the fifth lens to the imaging surface.

[0014] The third lens can have a negative refractive power.

[0015] It can satisfy 5 < d2 / d1, where d2 is the distance on the optical axis between the image side surface of the second lens and the object side surface of the third lens, and d1 is the distance on the optical axis between the image side surface of the first lens and the object side surface of the second lens.

[0016] The optical imaging system can further include an optical path conversion member disposed on the object side of the first lens.

[0017] The optical imaging system can have a total of five lenses.

[0018] In another general aspect, the optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side, where 0.9 ≤ TTL / f ≤ 0.95 and 3.10 < f / IMG HT < 3.15 are satisfied, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, f is the focal length of the optical imaging system, and IMG HT is half of the diagonal length of the imaging surface.

[0019] The optical imaging system can further include an optical path conversion member disposed on the object side of the first lens.

[0020] It can satisfy 0.19 < DL12 / TTL < 0.23, where DL12 is the distance on the optical axis from the object side surface of the first lens to the image side surface of the second lens.

[0021] The first lens can be a D-shaped cutting lens, where 1.8 < AR1 + AR2 < 2.0 is satisfied, where AR1 is the aspect ratio of the maximum effective diameter of the first lens and AR2 is the aspect ratio of the maximum effective diameter of the second lens.

[0022] The fifth lens can have a convex object side surface and a concave image side surface.

[0023] It can satisfy 0 < |f / f3| < 0.6, where f3 is the focal length of the third lens.

[0024] An optical imaging system can have a total of five lenses.

[0025] Other features and aspects will become apparent from the following detailed description, drawings, and claims. Attached Figure Description

[0026] Figure 1A This is a configuration diagram of an optical imaging system according to a first embodiment of the present disclosure.

[0027] Figure 1B This is a graph showing the aberration characteristics of an optical imaging system according to a first embodiment of the present disclosure.

[0028] Figure 2A This is a configuration diagram of an optical imaging system according to the second embodiment of the present disclosure.

[0029] Figure 2B This is a graph showing the aberration characteristics of an optical imaging system according to a second embodiment of the present disclosure.

[0030] Figure 3A This is a configuration diagram of an optical imaging system according to the third embodiment of this disclosure.

[0031] Figure 3B This is a graph showing the aberration characteristics of an optical imaging system according to a third embodiment of the present disclosure.

[0032] Figure 4A This is a configuration diagram of an optical imaging system according to the fourth embodiment of this disclosure.

[0033] Figure 4B This is a graph showing the aberration characteristics of an optical imaging system according to a fourth embodiment of the present disclosure.

[0034] Figure 5A This is a configuration diagram of an optical imaging system according to the fifth embodiment of this disclosure.

[0035] Figure 5B This is a graph showing the aberration characteristics of an optical imaging system according to a fifth embodiment of the present disclosure.

[0036] Figure 6A This is a configuration diagram of an optical imaging system according to the sixth embodiment of this disclosure.

[0037] Figure 6B This is a graph showing the aberration characteristics of an optical imaging system according to a sixth embodiment of the present disclosure.

[0038] Figure 7AThis is a configuration diagram of an optical imaging system according to the seventh embodiment of this disclosure.

[0039] Figure 7B This is a graph showing the aberration characteristics of an optical imaging system according to the seventh embodiment of the present disclosure.

[0040] Figure 8A This is a configuration diagram of an optical imaging system according to the eighth embodiment of this disclosure.

[0041] Figure 8B This is a graph showing the aberration characteristics of an optical imaging system according to the eighth embodiment of the present disclosure.

[0042] Figure 9A This is a configuration diagram of an optical imaging system according to the ninth embodiment of this disclosure.

[0043] Figure 9B This is a graph showing the aberration characteristics of an optical imaging system according to the ninth embodiment of this disclosure.

[0044] Figure 10A This is a configuration diagram of an optical imaging system according to the tenth embodiment of this disclosure.

[0045] Figure 10B This is a graph showing the aberration characteristics of an optical imaging system according to the tenth embodiment of the present disclosure.

[0046] Figure 11 This is a configuration diagram of the optical imaging system disclosed herein, including the optical path conversion component.

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 form 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] In this specification, the units for lens radius of curvature, thickness, gap or distance, focal length, IMG HT (half the diagonal length of the imaging plane), and effective radius (half-aperture) are all mm, and the unit for field of view (FOV) is degrees. Furthermore, lens thickness and gap between lenses can refer to the thickness and gap along the optical axis, respectively.

[0060] In this specification, the object side may indicate the orientation in which the object is positioned, and the image side may indicate, for example, the orientation in which an imaging surface having an image formed thereon is positioned, or the orientation in which an image sensor is positioned.

[0061] In this specification, in descriptions relating to the shape of a lens, the disclosure that a surface is convex means that the paraxial region (a very narrow region near the optical axis) of the corresponding surface is convex, and the disclosure that a surface is concave means that the paraxial region of the corresponding surface is concave. Therefore, even if one surface of a lens is described as having a convex shape, the edge portion of the lens may be concave. Similarly, even if one surface of a lens is described as having a concave shape, the edge portion of the lens may have a convex shape.

[0062] The optical imaging system according to embodiments of this disclosure can be used in a camera of a mobile device. The optical imaging system according to embodiments can be a camera mounted on the front side of a mobile device. The mobile device can be any type of portable electronic device such as a mobile communication terminal, a smartphone, or a tablet PC.

[0063] In embodiments of this disclosure, the optical imaging system may include five lenses L (see Figure 1 and...). Figure 11 In an 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.

[0064] Furthermore, the optical imaging system may not only consist of five lenses L, but may also include an image sensor that converts incident light into an electrical signal, an infrared blocking filter that blocks light incident on the infrared region of the image sensor, and an aperture that adjusts the amount of light incident on the lenses. In embodiments of this disclosure, the aperture may be positioned between the second and third lenses.

[0065] Furthermore, optical imaging systems may also include optical path conversion components (e.g., prisms) that bend the path of incident light (see P). Figure 11 ).

[0066] In embodiments of this disclosure, the optical imaging system may include lenses formed of a plastic material. In embodiments, 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.

[0067] In embodiments of this disclosure, the optical imaging system may include aspherical lenses. In embodiments, at least one of the first to fifth lenses may be an aspherical lens, and preferably, all of the first to fifth lenses may be aspherical lenses. At least one of the object-side and image-side surfaces of the first to fifth lenses may be aspherical. The aspherical surface of the lens may be represented by Equation 1.

[0068] Formula 1:

[0069]

[0070] In Equation 1, c represents the reciprocal of the radius of curvature of the lens, K represents the conic constant, and Y indicates 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 corresponding vertex of the aspherical surface.

[0071] In embodiments of this disclosure, the optical imaging system may satisfy the following conditional expression.

[0072] Conditional expression 1: 1.8 <AR1+AR2<2.0

[0073] Conditional expression 2: 0.9 ≤ TTL / f ≤ 0.95

[0074] Conditional expression 3: 5.1 <TTL×BFL / f<6.3

[0075] Conditional expression 4: 2.15 <f / BFL<2.60

[0076] Conditional expression 5: 3.10 <f / IMG HT<3.15

[0077] Conditional expression 6: 0.19 <DL12 / TTL<0.23

[0078] Conditional expression 7: 2.5 <DL12 / TTL×f<2.8

[0079] Conditional expression 8: 100 <DL15×f<115

[0080] Conditional expression 9: 0.2 <EDL1 / f<0.25

[0081] In conditional expression 1, AR1 is the aspect ratio of the maximum effective diameter of the first lens, and AR2 is the aspect ratio of the maximum effective diameter of the second lens. Conditional expression 1 relates to the characteristic that the optical imaging system according to embodiments of the present disclosure has a thin thickness.

[0082] In conditional expressions 2 to 4, TTL is the distance along the optical axis from the object-side surface of the first lens to the imaging plane, BFL is the distance along the optical axis from the image-side surface of the fifth lens to the imaging plane, and f is the focal length of the optical imaging system. Conditional expression 2 is a telephoto ratio conditional expression, and when a given range is satisfied, the camera can be considered as a telephoto camera. Conditional expressions 3 and 4 relate to the feature of the optical imaging system of the embodiments of this disclosure having telephoto characteristics.

[0083] In conditional expression 5, f is the focal length of the optical imaging system, and IMG HT is half the diagonal length of the imaging plane. Conditional expression 5 relates to the characteristic that the optical imaging system according to embodiments of this disclosure has a thin thickness.

[0084] In conditional expressions 6 to 8, DL12 is the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the second lens, DL15 is the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens, TTL is the distance along the optical axis from the object-side surface of the first lens to the imaging plane, and f is the focal length of the optical imaging system. Conditional expressions 6 and 7 relate to the optical characteristics of the first and second lenses of the optical imaging system according to embodiments of the present disclosure, to have telephoto characteristics. Conditional expression 8 relates to the characteristics of the optical imaging system according to embodiments of the present disclosure, which has a long focal length and a short length.

[0085] In conditional expression 9, EDL1 is the maximum effective radius of the object-side surface of the first lens, and f is the focal length of the optical imaging system. Conditional expression 9 relates to the shape conditions of the first lens of the optical imaging system according to embodiments of the present disclosure, so as to have suitable brightness performance and focal length.

[0086] In embodiments of this disclosure, the optical imaging system may additionally satisfy the following conditional expression:

[0087] Conditional expression 10: 2.0 <f / f1<3.0

[0088] Conditional expression 11: -3.0 <f / f2<-1.0

[0089] Conditional expression 12: 0 < |f / f3| < 0.6

[0090] Conditional expression 13: 0 <f / f4<1.3

[0091] Conditional expression 14: -1.2 <f / f5<-0.4

[0092] Conditional expression 15: -1.2 <f1 / f2<-0.6

[0093] Conditional expression 16: 0 < |f2 / f3| < 0.3

[0094] Conditional expression 17: -2.5 <f / f2+f / f3<-1.5

[0095] Conditional expression 18: 2.0 <TTL / f1≤2.5

[0096] Conditional expression 19: 0.2 ≤ R1 / f ≤ 0.3

[0097] Conditional expression 20:5 <d2 / d1

[0098] Conditional expression 21: 0.5 <EDL4 / EDL1<0.8

[0099] Conditional expression 22: 3.7≤TTL / ΣCTn≤4.3, (n=1,2,3)

[0100] In conditional expressions 10 to 17, f is the focal length of the optical imaging system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens. Conditional expressions 10 to 17 relate to the aberration correction performance of the optical imaging system according to embodiments of the present disclosure.

[0101] In conditional expression 18, TTL is the distance along the optical axis from the object-side surface of the first lens to the imaging plane, and f1 is the focal length of the first lens. In conditional expression 19, R1 is the radius of curvature of the object-side surface of the first lens, and f is the focal length of the optical imaging system. Conditional expressions 18 and 19 are related to the design conditions of the first lens to ensure that the optical imaging system according to embodiments of the present disclosure has telephoto characteristics.

[0102] In conditional expression 20, d2 is the distance on the optical axis between the image-side surface of the second lens and the object-side surface of the third lens, and d1 is the distance on the optical axis between the image-side surface of the first lens and the object-side surface of the second lens. Conditional expression 20 relates to the spacing conditions between the lenses from the first to the third lens according to their refractive power, to ensure the performance (focal length, chromatic aberration, etc.) of the optical imaging system according to the embodiments of this disclosure.

[0103] In conditional expression 21, EDL4 is the maximum effective radius of the fourth lens, and EDL1 is the maximum effective radius of the first lens. Conditional expression 21 relates to the effective lens diameter condition of the optical imaging system according to embodiments of the present disclosure, in order to achieve suitable brightness performance.

[0104] In conditional expression 22, TTL is the distance along the optical axis from the object side of the first lens to the imaging plane, and ΣCTn (n = 1, 2, 3) is the sum of the thicknesses of the first lens to the third lens along the optical axis. Conditional expression 22 relates to the manufacture and assembly of an optical imaging system according to embodiments of the present disclosure.

[0105] In the following description, an optical imaging system according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0106] <First Implementation Method>

[0107] Figure 1A This is a configuration diagram of an optical imaging system according to a first embodiment of the present disclosure, and Figure 1B This is a graph showing the aberration characteristics of an optical imaging system according to a first embodiment of the present disclosure.

[0108] 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 110.

[0109] The first lens 110 may have positive refractive power. The focal length of the first lens 110 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 110 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 110 may be aspherical. The first lens 110 may be a D-shaped cut lens with straight edges at its periphery.

[0110] The second lens 120 may have negative refractive power. The focal length of the second lens 120 may be less than -5.0 mm. 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 different optical properties (refractive index and Abbe number) than the first lens 110. The Abbe number of the second lens 120 may be 20 or greater. The second lens 120 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 120 may be aspherical.

[0111] The third lens 130 may have positive refractive power. The focal length of the third lens 130 may be 30.0 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 different optical properties (refractive index and Abbe number) than the second lens 120. The Abbe number of the third lens 130 may be less than 20. The third lens 130 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 130 may be aspherical.

[0112] 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 different optical properties (refractive index and Abbe number) than the third lens 130. The Abbe number of the fourth lens 140 may be 20 or greater. The fourth lens 140 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 140 may be aspherical.

[0113] The fifth lens 150 can have negative refractive power. The focal length of the fifth lens 150 can be less than -10.0 mm. The object-side surface of the fifth lens 150 can be convex in the paraxial region, and the image-side surface of the fifth lens 150 can be concave in the paraxial region. The fifth lens 150 can be formed of a plastic material. For example, the fifth lens 150 can be formed of a plastic material having different optical properties (refractive index and Abbe number) than the fourth lens 140. The Abbe number of the fifth lens 150 can be 50 or greater. The fifth lens 150 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 150 can be aspherical.

[0114] The optical imaging system 100 according to the first embodiment of this disclosure may have a focal length of 14.377 mm, a TTL of 13.300 mm, a BFL of 5.859 mm, an IMG HT of 4.608 mm, an f-number of 2.55, and an HFOV of 17.45°.

[0115] Table 1 below shows the optical and physical parameters of the optical imaging system 100 according to the first embodiment of this disclosure.

[0116] Table 1:

[0117]

[0118]

[0119] Table 2 below shows the aspherical data of the optical imaging system 100 according to the first embodiment of the present disclosure.

[0120] Table 2:

[0121]

[0122]

[0123] <Second Implementation Method>

[0124] Figure 2A This is a configuration diagram of an optical imaging system according to the second embodiment of the present disclosure. Figure 2B This is a graph showing the aberration characteristics of an optical imaging system according to a second embodiment of the present disclosure.

[0125] 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 210.

[0126] The first lens 210 may have positive refractive power. The focal length of the first lens 210 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 210 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 210 may be aspherical. The first lens 210 may be a D-shaped cut lens with straight edges at its periphery.

[0127] The second lens 220 may have negative refractive power. The focal length of the second lens 220 may be less than -5.0 mm. 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 different optical properties (refractive index and Abbe number) than the first lens 210. The Abbe number of the second lens 220 may be 20 or greater. The second lens 220 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 220 may be aspherical.

[0128] The third lens 230 may have positive refractive power. The focal length of the third lens 230 may be 30.0 mm or greater. The object-side surface of the third lens 230 may be convex in the paraxial region, and the image-side surface of the third lens 230 may be concave 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 different optical properties (refractive index and Abbe number) than the second lens 220. The Abbe number of the third lens 230 may be less than 20. The third lens 230 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 230 may be aspherical.

[0129] The fourth lens 240 may have positive refractive power. The focal length of the fourth lens 240 may be 10.0 mm or greater. The object-side surface of the fourth lens 240 may be concave in the paraxial region, and the image-side surface of the fourth lens 240 may be convex 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 different optical properties (refractive index and Abbe number) than the third lens 230. The Abbe number of the fourth lens 240 may be 20 or greater. The fourth lens 240 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 240 may be aspherical.

[0130] The fifth lens 250 can have negative refractive power. The focal length of the fifth lens 250 can be less than -10.0 mm. The object-side surface of the fifth lens 250 can be convex in the paraxial region, and the image-side surface of the fifth lens 250 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 240. The Abbe number of the fifth lens 250 can be 50 or greater. The fifth lens 250 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 250 can be aspherical.

[0131] The optical imaging system 200 according to the second embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.297 mm, a BFL of 5.800 mm, an IMG HT of 4.595 mm, an f-number of 2.54, and an HFOV of 17.45°.

[0132] Table 3 below shows the optical and physical parameters of the optical imaging system 200 according to the second embodiment of this disclosure.

[0133] Table 3:

[0134]

[0135] Table 4 below shows the aspherical data of the optical imaging system 200 according to the second embodiment of this disclosure.

[0136] Table 4:

[0137]

[0138]

[0139] <Third Implementation Method>

[0140] Figure 3A This is a configuration diagram of an optical imaging system according to the third embodiment of this disclosure. Figure 3BThis is a graph showing the aberration characteristics of an optical imaging system according to a third embodiment of the present disclosure.

[0141] According to a 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 310.

[0142] The first lens 310 may have positive refractive power. The focal length of the first lens 310 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 310 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 310 may be aspherical. The first lens 310 may be a D-shaped cut lens with straight edges at its periphery.

[0143] The second lens 320 may have negative refractive power. The focal length of the second lens 320 may be less than -5.0 mm. 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 different optical properties (refractive index and Abbe number) than the first lens 310. The Abbe number of the second lens 320 may be 20 or greater. The second lens 320 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 320 may be aspherical.

[0144] The third lens 330 may have positive refractive power. The focal length of the third lens 330 may be 30.0 mm or greater. The object-side surface of the third lens 330 may be convex in the paraxial region, and the image-side surface of the third lens 330 may be concave 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 different optical properties (refractive index and Abbe number) than the second lens 320. The Abbe number of the third lens 330 may be less than 20. The third lens 330 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 330 may be aspherical.

[0145] 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 different optical properties (refractive index and Abbe number) than the third lens 330. The Abbe number of the fourth lens 340 may be 20 or greater. The fourth lens 340 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 340 may be aspherical.

[0146] The fifth lens 350 can have negative refractive power. The focal length of the fifth lens 350 can be less than -10.0 mm. The object-side surface of the fifth lens 350 can be convex in the paraxial region, and the image-side surface of the fifth lens 350 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 340. The Abbe number of the fifth lens 350 can be 50 or greater. The fifth lens 350 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 350 can be aspherical.

[0147] The optical imaging system 300 according to the third embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.300 mm, a BFL of 5.930 mm, an IMG HT of 4.595 mm, an f-number of 2.55, and an HFOV of 17.45°.

[0148] Table 5 below shows the optical and physical parameters of the optical imaging system 300 according to the third embodiment of this disclosure.

[0149] Table 5:

[0150]

[0151] Table 6 below shows the aspherical data of the optical imaging system 300 according to the third embodiment of the present disclosure.

[0152] Table 6:

[0153]

[0154] <Fourth Implementation Method>

[0155] Figure 4A This is a configuration diagram of an optical imaging system according to the fourth embodiment of this disclosure. Figure 4B This is a graph showing the aberration characteristics of an optical imaging system according to a fourth embodiment of the present disclosure.

[0156] 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 410.

[0157] The first lens 410 may have positive refractive power. The focal length of the first lens 410 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 410 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 410 may be aspherical. The first lens 410 may be a D-shaped cut lens with straight edges at its periphery.

[0158] The second lens 420 may have negative refractive power. The focal length of the second lens 420 may be less than -5.0 mm. The object-side and image-side surfaces of the second lens 420 may have concave shapes 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 different optical properties (refractive index and Abbe number) than the first lens 410. The Abbe number of the second lens 420 may be 20 or greater. The second lens 420 may be 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 30.0 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 different optical properties (refractive index and Abbe number) than the second lens 420. The Abbe number of the third lens 430 may be less than 20. The third lens 430 may be 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 different optical properties (refractive index and Abbe number) than the third lens 430. The Abbe number of the fourth lens 440 may be 20 or greater. The fourth lens 440 may be 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 can have negative refractive power. The focal length of the fifth lens 450 can be less than -10.0 mm. The object-side surface of the fifth lens 450 can be convex in the paraxial region, and the image-side surface of the fifth lens 450 can be concave in the paraxial region. The fifth lens 450 can be formed of a plastic material. For example, the fifth lens 450 can be formed of a plastic material having different optical properties (refractive index and Abbe number) than the fourth lens 440. The Abbe number of the fifth lens 450 can be 50 or greater. The fifth lens 450 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 450 can be aspherical.

[0162] The optical imaging system 400 according to the fourth embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.300 mm, a BFL of 5.800 mm, an IMG HT of 4.595 mm, an f-number of 2.54, and an HFOV of 17.45°.

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

[0164] Table 7:

[0165]

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

[0167] Table 8:

[0168]

[0169]

[0170] <Fifth Implementation Method>

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

[0172] According to a 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 510.

[0173] The first lens 510 may have positive refractive power. The focal length of the first lens 510 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 510 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 510 may be aspherical. The first lens 510 may be a D-shaped cut lens with straight edges at its periphery.

[0174] The second lens 520 may have negative refractive power. The focal length of the second lens 520 may be less than -5.0 mm. The object-side and image-side surfaces of the second lens 520 may have concave shapes 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 different optical properties (refractive index and Abbe number) than the first lens 510. The Abbe number of the second lens 520 may be 20 or greater. The second lens 520 may be an aspherical lens. For example, the object-side and image-side surfaces of the second lens 520 may be aspherical.

[0175] The third lens 530 may have positive refractive power. The focal length of the third lens 530 may be 30.0 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 different optical properties (refractive index and Abbe number) than the second lens 520. The Abbe number of the third lens 530 may be less than 20. The third lens 530 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 530 may be aspherical.

[0176] 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 different optical properties (refractive index and Abbe number) than the third lens 530. The Abbe number of the fourth lens 540 may be 20 or greater. The fourth lens 540 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 540 may be aspherical.

[0177] The fifth lens 550 can have negative refractive power. The focal length of the fifth lens 550 can be less than -10.0 mm. The object-side surface of the fifth lens 550 can be convex in the paraxial region, and the image-side surface of the fifth lens 550 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 540. The Abbe number of the fifth lens 550 can be 50 or greater. The fifth lens 550 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 550 can be aspherical.

[0178] The optical imaging system 500 according to the fifth embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.301 mm, a BFL of 5.703 mm, an IMG HT of 4.595 mm, an f-number of 2.55, and an HFOV of 17.37°.

[0179] Table 9 below shows the optical and physical parameters of the optical imaging system 500 according to the fifth embodiment of this disclosure.

[0180] Table 9:

[0181]

[0182]

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

[0184] Table 10:

[0185]

[0186]

[0187] <Sixth Implementation Method>

[0188] Figure 6A This is a configuration diagram of an optical imaging system according to the sixth embodiment of this disclosure. Figure 6B This is a graph showing the aberration characteristics of an optical imaging system according to a sixth embodiment of the present disclosure.

[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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 610.

[0190] The first lens 610 may have positive refractive power. The focal length of the first lens 610 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 610 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 610 may be aspherical. The first lens 610 may be a D-shaped cut lens with straight edges at its periphery.

[0191] The second lens 620 may have negative refractive power. The focal length of the second lens 620 may be less than -5.0 mm. The object-side and image-side surfaces of the second lens 620 may have concave shapes 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 different optical properties (refractive index and Abbe number) than the first lens 610. The Abbe number of the second lens 620 may be 20 or greater. The second lens 620 may be an aspherical lens. For example, the object-side and image-side surfaces of the second lens 620 may be aspherical.

[0192] The third lens 630 may have positive refractive power. The focal length of the third lens 630 may be 30.0 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 different optical properties (refractive index and Abbe number) than the second lens 620. The Abbe number of the third lens 630 may be 20 or greater. The third lens 630 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 630 may be aspherical.

[0193] 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 different optical properties (refractive index and Abbe number) than the third lens 630. The Abbe number of the fourth lens 640 may be less than 20. The fourth lens 640 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 640 may be aspherical.

[0194] The fifth lens 650 can have negative refractive power. The focal length of the fifth lens 650 can be less than -10.0 mm. The object-side surface of the fifth lens 650 can be convex in the paraxial region, and the image-side surface of the fifth lens 650 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 640. The Abbe number of the fifth lens 650 can be 50 or greater. The fifth lens 650 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 650 can be aspherical.

[0195] The optical imaging system 600 according to the sixth embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.300 mm, a BFL of 6.090 mm, an IMG HT of 4.595 mm, an f-number of 2.62, and an HFOV of 17.45°.

[0196] Table 11 below shows the optical and physical parameters of the optical imaging system 600 according to the sixth embodiment of the present disclosure.

[0197] Table 11:

[0198]

[0199]

[0200] Table 12 below shows the aspherical data of the optical imaging system 600 according to the sixth embodiment of the present disclosure.

[0201] Table 12:

[0202]

[0203]

[0204] <Seventh Implementation Method>

[0205] Figure 7A This is a configuration diagram of an optical imaging system according to the seventh embodiment of this disclosure. Figure 7B This is a graph showing the aberration characteristics of an optical imaging system according to the seventh embodiment of the present disclosure.

[0206] 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 710.

[0207] The first lens 710 may have positive refractive power. The focal length of the first lens 710 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 710 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 710 may be aspherical. The first lens 710 may be a D-shaped cut lens with straight edges at its periphery.

[0208] The second lens 720 may have negative refractive power. The focal length of the second lens 720 may be less than -5.0 mm. The object-side and image-side surfaces of the second lens 720 may have concave shapes 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 different optical properties (refractive index and Abbe number) than the first lens 710. The Abbe number of the second lens 720 may be 20 or greater. The second lens 720 may be an aspherical lens. For example, the object-side and image-side surfaces of the second lens 720 may be aspherical.

[0209] The third lens 730 may have positive refractive power. The focal length of the third lens 730 may be 30.0 mm or greater. The object-side surface of the third lens 730 may be convex in the paraxial region, and the image-side surface of the third lens 730 may be concave 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 different optical properties (refractive index and Abbe number) than the second lens 720. The Abbe number of the third lens 730 may be 20 or greater. The third lens 730 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 730 may be aspherical.

[0210] 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 different optical properties (refractive index and Abbe number) than the third lens 730. The Abbe number of the fourth lens 740 may be 20 or greater. The fourth lens 740 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 740 may be aspherical.

[0211] The fifth lens 750 can have negative refractive power. The focal length of the fifth lens 750 can be less than -10.0 mm. The object-side surface of the fifth lens 750 can be convex in the paraxial region, and the image-side surface of the fifth lens 750 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 740. The Abbe number of the fifth lens 750 can be 50 or greater. The fifth lens 750 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 750 can be aspherical.

[0212] The optical imaging system 700 according to the seventh embodiment of this disclosure may have a focal length of 14.337 mm, a TTL of 13.308 mm, a BFL of 5.547 mm, an IMG HT of 4.595 mm, an f-number of 2.54, and an HFOV of 17.45°.

[0213] Table 13 below shows the optical and physical parameters of the optical imaging system 700 according to the seventh embodiment of this disclosure.

[0214] Table 13:

[0215]

[0216] Table 14 below shows the aspherical data of the optical imaging system 700 according to the seventh embodiment of the present disclosure.

[0217] Table 14:

[0218]

[0219]

[0220] <Eighth Implementation Method>

[0221] Figure 8A This is a configuration diagram of an optical imaging system according to the eighth embodiment of this disclosure. Figure 8B This is a graph showing the aberration characteristics of an optical imaging system according to the eighth embodiment of the present disclosure.

[0222] 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. Furthermore, although not shown in the figure, a light path conversion member (e.g., a prism) that bends the incident light path may be disposed on the object side of the first lens 810.

[0223] The first lens 810 may have positive refractive power. The focal length of the first lens 810 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 810 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 810 may be aspherical. The first lens 810 may be a D-shaped cut lens with straight edge portions at the edges.

[0224] The second lens 820 may have negative refractive power. The focal length of the second lens 820 may be less than -5.0 mm. 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 different optical properties (refractive index and Abbe number) than the first lens 810. The Abbe number of the second lens 820 may be 20 or greater. The second lens 820 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 820 may be aspherical.

[0225] The third lens 830 may have negative refractive power. The focal length of the third lens 830 may be less than -20.0 mm. 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 different optical properties (refractive index and Abbe number) than the second lens 820. The Abbe number of the third lens 830 may be less than 20. The third lens 830 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 830 may be aspherical.

[0226] 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 surface of the fourth lens 840 may be concave in the paraxial region, and the image-side surface 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 different optical properties (refractive index and Abbe number) than the third lens 830. The Abbe number of the fourth lens 840 may be 20 or greater. The fourth lens 840 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 840 may be aspherical.

[0227] The fifth lens 850 can have negative refractive power. The focal length of the fifth lens 850 can be less than -10.0 mm. The object-side surface of the fifth lens 850 can be convex in the paraxial region, and the image-side surface of the fifth lens 850 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 840. The Abbe number of the fifth lens 850 can be 50 or greater. The fifth lens 850 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 850 can be aspherical.

[0228] The optical imaging system 800 according to the eighth embodiment of this disclosure may have a focal length of 14.417 mm, a TTL of 13.547 mm, a BFL of 6.487 mm, an IMG HT of 4.621 mm, an f-number of 2.65, and an HFOV of 17.45°.

[0229] Table 15 below shows the optical and physical parameters of the optical imaging system 800 according to the eighth embodiment of this disclosure.

[0230] Table 15:

[0231]

[0232] Table 16 below shows the aspherical data of the optical imaging system 800 according to the eighth embodiment of the present disclosure.

[0233] Table 16:

[0234] Face number 2 3 4 5 6 K -9.04E-01 1.38E+01 -1.08E+01 -1.08E-01 8.91E+01 A 2.57E-03 4.99E-03 -2.53E-03 -1.53E-02 -1.43E-03 B 1.44E-04 -4.36E-03 -3.30E-03 -6.49E-03 2.82E-03 C -9.59E-05 3.22E-03 1.46E-03 3.42E-02 -1.30E-02 D 8.18E-05 -2.45E-03 9.96E-04 -9.72E-02 4.56E-02 E -4.12E-05 1.75E-03 -2.32E-03 1.83E-01 -9.81E-02 F 7.26E-06 -9.82E-04 2.33E-03 -2.35E-01 1.44E-01 G 3.92E-06 4.01E-04 -1.51E-03 2.14E-01 -1.48E-01 H -3.07E-06 -1.19E-04 6.66E-04 -1.39E-01 1.08E-01 J 1.01E-06 2.25E-05 -2.05E-04 6.53E-02 -5.65E-02 L -1.99E-07 -3.92E-06 4.37E-05 -2.19E-02 2.09E-02 M 2.48E-08 4.23E-07 -6.39E-06 5.11E-03 -5.34E-03 N -1.93E-09 -3.04E-08 6.10E-07 -7.89E-04 8.98E-04 O 8.62E-11 1.30E-09 -3.42E-08 7.24E-05 -8.93E-05 P -1.68E-12 -2.53E-11 8.58E-10 -2.99E-06 3.98E-06 Face number 7 8 9 10 11 K 8.49E+01 2.25E+01 -1.49E+01 -8.60E+01 -2.58E+01 A 2.80E-03 3.06E-02 5.36E-02 1.32E-01 7.09E-02 B -1.06E-02 -4.78E-02 -1.82E-01 -4.69E-01 1.92E-01 C 5.19E-02 8.80E-02 3.77E-01 9.03E-01 2.91E-01 D -1.48E-01 -1.21E-01 -5.14E-01 -1.21E+00 -3.19E-01 E 2.77E-01 1.20E-01 4.92E-01 1.18E+00 2.56E-01 F -3.48E-01 -8.42E-02 -3.39E-01 -8.54E-01 -1.52E-01 G 2.98E-01 4.24E-02 1.73E-01 4.59E-01 6.62E-02 H -1.73E-01 -1.52E-02 -6.56E-02 -1.85E-01 -2.14E-02 J 6.50E-02 3.75E-03 1.87E-02 5.55E-02 5.04E-03 L -1.39E-02 -5.97E-04 -3.94E-03 -1.22E-02 -8.56E-04 M 6.74E-04 4.95E-05 6.05E-04 1.92E-03 1.01E-04 N 4.33E-04 3.66E-07 -6.42E-05 -2.03E-04 -7.87E-06 O -1.05E-04 -4.42E-07 4.25E-06 1.29E-05 3.58E-07 P 7.83E-06 2.69E-08 -1.32E-07 -3.77E-07 -7.15E-09

[0235] <Ninth Implementation Method>

[0236] Figure 9A This is a configuration diagram of an optical imaging system according to the ninth embodiment of this disclosure. Figure 9B This is a graph showing the aberration characteristics of an optical imaging system according to the ninth embodiment of this disclosure.

[0237] 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. Furthermore, although not shown in this figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 910.

[0238] The first lens 910 may have positive refractive power. The focal length of the first lens 910 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 910 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 910 may be aspherical. The first lens 910 may be a D-shaped cut lens with straight edges at its periphery.

[0239] The second lens 920 may have negative refractive power. The focal length of the second lens 920 may be less than -5.0 mm. 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 different optical properties (refractive index and Abbe number) than the first lens 910. The Abbe number of the second lens 920 may be 20 or greater. The second lens 920 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 920 may be aspherical.

[0240] The third lens 930 may have negative refractive power. The focal length of the third lens 930 may be less than -20.0 mm. 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 different optical properties (refractive index and Abbe number) than the second lens 920. The Abbe number of the third lens 930 may be less than 20. The third lens 930 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 930 may be aspherical.

[0241] 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 different optical properties (refractive index and Abbe number) than the third lens 930. The Abbe number of the fourth lens 940 may be 20 or greater. The fourth lens 940 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 940 may be aspherical.

[0242] The fifth lens 950 can have negative refractive power. The focal length of the fifth lens 950 can be less than -10.0 mm. The object-side surface of the fifth lens 950 can be convex in the paraxial region, and the image-side surface of the fifth lens 950 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 940. The Abbe number of the fifth lens 950 can be 50 or greater. The fifth lens 950 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 950 can be aspherical.

[0243] The optical imaging system 900 according to the ninth embodiment of this disclosure may have a focal length of 14.417 mm, a TTL of 13.608 mm, a BFL of 6.557 mm, an IMG HT of 4.621 mm, an f-number of 2.65, and an HFOV of 17.27°.

[0244] Table 17 below shows the optical and physical parameters of the optical imaging system 900 according to the ninth embodiment of this disclosure.

[0245] Table 17:

[0246]

[0247]

[0248] Table 18 below shows the aspherical data of the optical imaging system 900 according to the ninth embodiment of this disclosure.

[0249] Table 18:

[0250]

[0251]

[0252] <Tenth Implementation Method>

[0253] Figure 10A This is a configuration diagram of an optical imaging system according to the tenth embodiment of this disclosure. Figure 10B This is a graph showing the aberration characteristics of an optical imaging system according to the tenth embodiment of the present disclosure.

[0254] 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. Furthermore, although not shown in this figure, a light path conversion member (e.g., a prism) that bends the path of incident light may be disposed on the object side of the first lens 1010.

[0255] The first lens 1010 may have positive refractive power. The focal length of the first lens 1010 may be 5.0 mm or greater. The object-side and image-side surfaces of the first lens 1010 may have a convex shape 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 an aspherical lens. For example, the object-side and image-side surfaces of the first lens 1010 may be aspherical. The first lens 1010 may be a D-shaped cut lens with straight edges at its periphery.

[0256] The second lens 1020 may have negative refractive power. The focal length of the second lens 1020 may be -5.0 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 different optical properties (refractive index and Abbe number) than the first lens 1010. The Abbe number of the second lens 1020 may be 20 or greater. The second lens 1020 may be an aspherical lens. For example, both the object-side and image-side surfaces of the second lens 1020 may be aspherical.

[0257] The third lens 1030 may have negative refractive power. The focal length of the third lens 1030 may be -20.0 mm or less. 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 different optical properties (refractive index and Abbe number) than the second lens 1020. The Abbe number of the third lens 1030 may be less than 20. The third lens 1030 may be an aspherical lens. For example, both the object-side and image-side surfaces of the third lens 1030 may be aspherical.

[0258] 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 different optical properties (refractive index and Abbe number) than the third lens 1030. The Abbe number of the fourth lens 1040 may be 20 or greater. The fourth lens 1040 may be an aspherical lens. For example, both the object-side and image-side surfaces of the fourth lens 1040 may be aspherical.

[0259] The fifth lens 1050 can have negative refractive power. The focal length of the fifth lens 1050 can be less than -10.0 mm. The object-side surface of the fifth lens 1050 can be convex in the paraxial region, and the image-side surface of the fifth lens 1050 can be concave in the paraxial region. 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 different optical properties (refractive index and Abbe number) than the fourth lens 1040. The Abbe number of the fifth lens 1050 can be 50 or greater. The fifth lens 1050 can be an aspherical lens. For example, both the object-side and image-side surfaces of the fifth lens 1050 can be aspherical.

[0260] The optical imaging system 1000 according to the tenth embodiment of this disclosure may have a focal length of 14.417 mm, a TTL of 13.612 mm, a BFL of 6.571 mm, an IMG HT of 4.621 mm, an f-number of 2.64, and an HFOV of 17.28°.

[0261] Table 19 below shows the optical and physical parameters of the optical imaging system 1000 according to the tenth embodiment of this disclosure.

[0262] Table 19:

[0263]

[0264]

[0265] Table 20 below shows the aspherical data of the optical imaging system 1000 according to the tenth embodiment of the present disclosure.

[0266] Table 20:

[0267]

[0268]

[0269] Table 21 below shows the optical and physical parameters associated with the conditional expressions of the optical imaging system according to embodiments of the present disclosure. In the table below, the units for DL12, DL15, EDL1, EDL4 and ΣCTn are all mm.

[0270] Table 21:

[0271]

[0272] According to embodiments of this disclosure, the telephoto rate of an intermediate magnification camera can be reduced.

[0273] 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, characterized in that, include: The first lens has refractive power; The second lens has negative refractive power; The third lens has refractive power; The fourth lens has positive 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, and Among them, 3.10 is satisfied. <f / IMG HT<3.15, Where f is the focal length of the optical imaging system, and IMG HT is half the diagonal length of the imaging plane.

2. The optical imaging system according to claim 1, characterized in that, The condition 3.7 ≤ TTL / ΣCTn (n = 1, 2, 3) ≤ 4.3 is satisfied. Wherein, TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, and ΣCTn (n=1,2,3) is the sum of the thicknesses of the first lens to the third lens on the optical axis.

3. The optical imaging system according to claim 1, characterized in that, The first lens has a convex image-side surface, and Among them, 0.2≤R1 / f≤0.3, Wherein, R1 is the radius of curvature of the object side surface of the first lens.

4. The optical imaging system according to claim 1, characterized in that, Satisfies -2.5 <f / f2+f / f3<-1.5, Where f2 is the focal length of the second lens and f3 is the focal length of the third lens.

5. The optical imaging system according to claim 1, characterized in that, Meets 2.0 <TTL / f1≤2.5, Wherein, TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, and f1 is the focal length of the first lens.

6. The optical imaging system according to claim 1, characterized in that, The third lens has positive refractive power and a convex object-side surface.

7. The optical imaging system according to claim 1, characterized in that, Satisfies 2.15 <f / BFL<2.60, Wherein, BFL is the distance along the optical axis from the image-side surface of the fifth lens to the imaging surface.

8. The optical imaging system according to claim 1, characterized in that, The third lens has negative refractive power.

9. The optical imaging system according to claim 1, characterized in that, Satisfy 5 <d2 / d1, Wherein, d2 is the distance on the optical axis between the image-side surface of the second lens and the object-side surface of the third lens, and d1 is the distance on the optical axis between the image-side surface of the first lens and the object-side surface of the second lens.

10. The optical imaging system according to claim 1, characterized in that, It also includes an optical path conversion component disposed on the object side of the first lens.

11. The optical imaging system according to claim 1, characterized in that, The optical imaging system has a total of five lenses.

12. An optical imaging system, characterized in that, include: The first lens, second lens, third lens, fourth lens, and fifth lens are arranged sequentially from the object side. Among them, 0.9 ≤ TTL / f ≤ 0.95 and 3.10 are satisfied. <f / IMG HT<3.15, Where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, f is the focal length of the optical imaging system, and IMG HT is half the diagonal length of the imaging surface.

13. The optical imaging system according to claim 12, characterized in that, It also includes an optical path conversion component disposed on the object side of the first lens.

14. The optical imaging system according to claim 12, characterized in that, Satisfies 0.19 <DL12 / TTL<0.23, Wherein, DL12 is the distance along the optical axis from the object side of the first lens to the image side of the second lens.

15. The optical imaging system according to claim 12, characterized in that, The first lens is a D-shaped cut lens, and Among them, 1.8 is satisfied. <AR1+AR2<2.0, Wherein, AR1 is the aspect ratio of the maximum effective diameter of the first lens, and AR2 is the aspect ratio of the maximum effective diameter of the second lens.

16. The optical imaging system according to claim 12, characterized in that, The fifth lens has a convex object-side surface and a concave image-side surface.

17. The optical imaging system according to claim 12, characterized in that, The condition is satisfied that 0 < |f / f3| < 0.

6. Where f3 is the focal length of the third lens.

18. The optical imaging system according to claim 12, characterized in that, The optical imaging system has a total of five lenses.

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