Optical image capturing system

Abstract

An optical imaging system is provided. The optical image capturing system includes: a first lens group including at least one lens disposed in a first optical axis direction; a second lens group including at least one lens disposed in a second optical axis direction perpendicular to the first optical axis direction; and a prism disposed between the first lens group and the second lens group and configured to convert a path of incident light from a first optical axis direction to a second optical axis direction, in which a conditional expression 0.200 < = D1 / OAL2 < = 0.500 is satisfied, where D1 is a maximum effective diameter of the first lens group, and OAL2 is a distance from a reflection surface of the prism to an imaging surface on the second optical axis.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2023-0139617 filed on October 18, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety for all purposes by reference. Technical Field

[0003] The following description relates to optical imaging systems, and more particularly, to optical imaging systems implemented in a mobile telephoto camera. Background Art

[0004] There is an increasing demand for high magnification telephoto cameras implemented in mobile devices, and there is an increasing demand for cameras with a slim form factor. Since it is desired that a high magnification telephoto camera has a relatively long focal length, the overall length of the camera may increase. Therefore, by providing a prism that converts the path of incident light on the object side of a plurality of lenses, the overall length of the camera can be ensured. However, in such a structure, there may be a limitation in increasing the diameter of the lens, and it is difficult to reduce the F value. Utility Model Content

[0005] This summary is provided to introduce a selection of concepts in a simplified form, which are further described in the following detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0006] In general, an optical imaging system includes: a first lens group including at least one lens arranged in a first optical axis direction; a second lens group including at least one lens arranged in a second optical axis direction perpendicular to the first optical axis direction; and a prism arranged between the first lens group and the second lens group and configured to convert a path of incident light from the first optical axis direction to the second optical axis direction, wherein a conditional expression of 0.200≤D1 / OAL2≤0.500 is satisfied, wherein D1 is a maximum effective diameter of the first lens group, and OAL2 is a distance from a reflection surface of the prism to an imaging surface on the second optical axis.

[0007] The first lens group may include a first lens having positive refractive power, and a second lens having negative refractive power and a meniscus shape convex toward the object side.

[0008] The second lens group may include a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed in the second optical axis direction, and the third lens and the fourth lens may have opposite refractive powers.

[0009] It can satisfy the conditional expression 0.500 ≤ fLG1 / f ≤ 0.800, where fLG1 is the focal length of the first lens group and f is the focal length of the optical imaging system.

[0010] It can satisfy the conditional expression 1.500 ≤ OAL1 / IMG HT ≤ 2.500, where OAL1 is the distance on the first optical axis from the object side surface of the lens closest to the object side in the first lens group to the reflecting surface of the prism, and IMG HT is half of the diagonal length of the imaging surface.

[0011] It can satisfy the conditional expression 0.500 ≤ FOV / OAL2 ≤ 0.600 (unit: mm -1 )), where FOV is the field of view of the optical imaging system.

[0012] It can satisfy the conditional expression 0.400 < D2 / OAL1 ≤ 1.000, where D2 is the maximum effective diameter of the second lens group and OAL1 is the distance on the first optical axis from the object side surface of the lens closest to the object side in the first lens group to the reflecting surface of the prism.

[0013] The second lens group may further include a seventh lens, which is disposed on the image side of the sixth lens and has a negative refractive power.

[0014] In a general aspect, the optical imaging system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are sequentially disposed from the object side toward the imaging surface; and a prism, which is disposed between the second lens and the third lens and is configured to convert the path of the incident light from the first optical axis direction to the second optical axis direction, where the first lens and the second lens are disposed on the object side of the prism and are included in the first lens group, and the third lens to the sixth lens are disposed on the image side of the prism and are included in the second lens group, satisfying the conditional expression 0.400 < D2 / OAL1 ≤ 1.000, where D2 is the maximum effective diameter of the second lens group and OAL1 is the distance on the first optical axis from the object side surface of the first lens to the reflecting surface of the prism.

[0015] The third lens may have a positive refractive power, a convex object side surface, and a convex image side surface.

[0016] The fourth lens may have a negative refractive power, a concave object side surface, and a convex image side surface.

[0017] The second lens group may further include a seventh lens, which is disposed on the image side of the sixth lens and has a negative refractive power.

[0018] The second lens may have a negative refractive power and may have a meniscus shape convex toward the object side.

[0019] The object side surface of the fifth lens may be recessed.

[0020] The sixth lens may have a negative refractive power.

[0021] The conditional expression 0.200 ≤ OAL1 / OAL2 ≤ 0.300 may be satisfied, where OAL2 is the distance on the second optical axis from the reflecting surface of the prism to the imaging surface.

[0022] In a general aspect, an optical imaging system includes: a first lens group including at least one lens disposed in a first optical axis direction; a second lens group including at least four lenses disposed in a second optical axis direction perpendicular to the first optical axis direction; and a prism disposed between the first lens group and the second lens group and configured to convert the path of incident light from the first optical axis direction to the second optical axis direction, where the conditional expression 0.400 < D2 / OAL1 ≤ 1.000 is satisfied, where D2 is the maximum effective diameter of the second lens group, and OAL1 is the distance on the first optical axis from the object side surface of the first lens disposed closest to the object side in the first lens group to the reflecting surface of the prism.

[0023] The first lens group includes a first lens having a convex object side surface and a concave image side surface.

[0024] The second lens group may have a negative refractive power.

[0025] Based on the following detailed description, drawings, and claims, other features and aspects will be apparent. Description of the Drawings

[0026] Figure 1A is a configuration diagram showing an exemplary optical imaging system according to a first embodiment.

[0027] Figure 1B is a diagram showing the aberration characteristics of an exemplary optical imaging system according to a first embodiment.

[0028] Figure 2A is a configuration diagram showing an exemplary optical imaging system according to a second embodiment.

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

[0030] Figure 3A is a configuration diagram showing an exemplary optical imaging system according to a third embodiment.

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

[0032] Figure 4A is a configuration diagram showing an exemplary optical imaging system according to the fourth embodiment.

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

[0034] Figure 5A is a configuration diagram showing an exemplary optical imaging system according to the fifth embodiment.

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

[0036] Fig. 6A is a configuration diagram showing an exemplary optical imaging system according to the sixth embodiment.

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

[0038] Fig. 7A is a configuration diagram showing an exemplary optical imaging system according to a seventh embodiment.

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

[0040] Fig. 8A is a configuration diagram showing an exemplary optical imaging system according to an eighth embodiment.

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

[0042] Fig. 9A is a configuration diagram showing an exemplary optical imaging system according to a ninth embodiment.

[0043] Fig. 9B : is a graph showing aberration characteristics of an exemplary optical imaging system according to the ninth embodiment.

[0044] Fig. 10A is a configuration diagram showing an exemplary optical imaging system according to a tenth embodiment.

[0045] Fig. 10B : is a graph showing aberration characteristics of an exemplary optical imaging system according to the tenth embodiment.

[0046] Throughout the drawings and detailed description, unless otherwise described, the same reference numerals refer to the same elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and descriptions of the elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0047] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the method, device and / or system described herein. However, after understanding the disclosure of the application, various changes, modifications and equivalents of the method, device and / or system described herein will be apparent. For example, the order of operations described herein and / or the order within the operation are only examples, and are not limited to the order set forth herein, but can be changed as will be apparent after understanding the disclosure of the application, except for the order of operations that must occur in a specific order and / or the order within the operation. As another example, the order of operations and / or the order within the operation can be performed in parallel, except for at least a portion of the order of operations that must occur in a certain order (e.g., a specific order) and / or at least a portion of the order within the operation. In addition, in order to improve clarity and brevity, the description of features known after understanding the disclosure of the application can be omitted.

[0048] Although terms such as "first", "second" and "third" or A, B, (a), (b) etc. may be used herein to describe various components, assemblies, regions, layers or parts, these components, assemblies, regions, layers or parts are not limited by these terms. Each of these terms is not used to define the essence, order or sequence of, for example, the corresponding component, component, region, layer or part, but is only used to distinguish the corresponding component, component, region, layer or part from other components, components, regions, layers or parts. Therefore, the first component, first component, first region, first layer or first part mentioned in the examples described herein may also be referred to as the second component, second component, second region, second layer or second part without departing from the teaching of the examples.

[0049] Throughout the specification, when a component, element, or layer is described as being "on," "connected to," "coupled to," or "engaged to" another component, element, or layer, it may be directly "on" (e.g., in contact with), directly "connected to," directly "coupled to," or directly "engaged to" the other component, element, or layer, or there may reasonably be one or more other components, elements, or layers between them. When a component, element, or layer is described as being "directly" "on," "directly connected to," "directly coupled to," or "directly engaged to" another component, element, or layer, there are no other components, elements, or layers between them. Similarly, expressions such as "between" and "immediately between," and "adjacent to" and "immediately adjacent to" may also be interpreted as described above.

[0050] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. The wordings "one", "a kind of" and "the" are intended to also include plural forms, unless the context clearly indicates otherwise. As non-limiting examples, the terms "include", "comprise" and "have" specify the presence of the features, quantities, operations, components, elements and / or their combinations, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or their combinations, nor exclude the presence of alternatives that replace the features, quantities, operations, components, elements and / or their combinations. In addition, although an embodiment can set forth such terms "include", "comprise" and "have" specify the presence of the features, quantities, operations, components, elements and / or their combinations, there may be other embodiments in which one or more of the features, quantities, operations, components, elements and / or their combinations are not present.

[0051] 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. The phrases "at least one of A, B, and C," etc. are intended to have separate meanings, and these phrases "at least one of A, B, and C," etc. also include examples in which one or more of A, B, and C may be present (e.g., any combination of one or more of A, B, and C), unless the corresponding description and implementation require that such a list (e.g., "at least one of A, B, and C") be interpreted as having a combined meaning.

[0052] In the drawings, the thickness, size, and shape of the lens may be exaggerated for ease of description, and the spherical shape or aspherical shape of the lens is only an example and is not limited thereto.

[0053] The features described herein can be implemented in different forms and will not be interpreted as being limited to the examples described herein. On the contrary, the examples described herein are only provided to illustrate some of the many possible ways of realizing the method, device and / or system described herein that will be apparent after understanding the disclosure of the present application. In this article, the term "can" (e.g., what can be included or realized about an example or an embodiment) is used with respect to an example or an embodiment to mean that there is at least one example or embodiment that includes or realizes this feature, and all examples and embodiments are not limited thereto. The terms "example" or "embodiment" used herein have the same meaning (e.g., the wording "in one example" has the same meaning as "in one embodiment", and "in one or more examples" has the same meaning as "in one or more embodiments").

[0054] One or more examples may provide an optical imaging system with improved low-light imaging performance.

[0055] In an embodiment, the unit of the value of the radius of curvature, thickness, distance, focal length, 1 / 2 of the diagonal length of the imaging plane (IMG HT), and the semi-aperture of the lens may be millimeter (mm), and the unit of the field of view (FOV) may be degree. In addition, the thickness of the lens and the distance between the lenses may refer to the thickness and distance on the optical axis.

[0056] In an embodiment, the object side may indicate a direction in which the object is disposed, and the image side may indicate, for example, a direction in which an imaging plane on which an image is formed is disposed or a direction in which an image sensor is disposed.

[0057] In the description related to the shape of the lens of the embodiment, a convex surface may indicate that the paraxial region (narrow region near the optical axis) portion of the surface may be convex, and a concave surface may indicate that the paraxial region portion of the surface may be concave. Therefore, even when one surface of the lens is described as having a convex shape, the edge portion of the lens may be concave. Similarly, even though one surface of the lens is described as having a concave shape, the edge portion of the lens may be convex.

[0058] In an example, the optical imaging system according to an embodiment may be implemented in a telephoto camera module for a mobile device. As a non-limiting example, the mobile device may be any type of portable electronic device, such as but not limited to a mobile communication terminal, a smart phone or a tablet personal computer (PC).

[0059] According to an embodiment, the optical imaging system may include 6 or 7 lenses. For example, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side toward the imaging surface, and may also include a seventh lens. In an example, the seventh lens may be arranged on the image side of the sixth lens.

[0060] In addition, according to an embodiment, the optical imaging system may include a plurality of lens groups. For example, the optical imaging system may include a first lens group and a second lens group sequentially arranged from the object side toward the imaging surface, and each of the plurality of lens groups may include at least one lens of the plurality of lenses.

[0061] According to an embodiment, the optical imaging system may include not only a plurality of lenses or lens groups, but also an optical path conversion device configured to convert the path of incident light, an image sensor configured to convert the incident light into an electrical signal, an infrared blocking filter configured to block light from an infrared region incident on the image sensor, and an aperture configured to control the amount of light.

[0062] According to an embodiment, the optical path conversion device can be configured as a prism, for example, and the prism can be arranged between the first lens group and the second lens group. When compensating for the shake of the camera, the prism can be tilted and driven relative to two axes (in an embodiment, the optical path conversion device can be configured as a prism). However, this is only an example, and other types of reflective components (e.g., reflectors) that can convert the optical path can be implemented instead of a prism. In addition, an infrared blocking filter can be arranged between the sixth lens or the seventh lens and the image sensor, and a stop can be arranged in the second lens group. In an embodiment, in a non-limiting example, the stop can be arranged between the fourth lens and the fifth lens or between the fifth lens and the sixth lens.

[0063] In addition, the optical imaging system according to the embodiment may further include a spacer disposed between the first lens group and the prism. In an example, the spacer may be disposed toward the incident surface of the prism. The spacer may include a light blocking portion formed along the circumference of the first lens group to reduce flare occurring when light passing through the first lens group is incident on the prism.

[0064] The optical imaging system according to an embodiment may include a plastic lens. In an example, at least a portion of the plurality of lenses may be formed of a plastic material, and preferably, the entire plurality of lenses may be formed of a plastic material.

[0065] In addition, the optical imaging system according to the embodiment may include an aspherical lens. For example, at least one of the plurality of lenses may be configured as an aspherical lens, and at least one of the object side and image side of at least one of the plurality of lenses may be aspherical. The aspherical surface of the lens may be represented by the following formula 1.

[0066] Formula 1:

[0067]

[0068] In Formula 1, c is the inverse of the radius of curvature of the lens, K is the cone constant, and Y is the distance from any point on the aspherical surface of the lens to the optical axis. In addition, constants A to H, J, and L to P are aspherical constants from the 4th to the 30th order, and Z is the distance in the optical axis direction between any point on the aspherical surface and the vertex of the aspherical surface.

[0069] In an embodiment, the first lens group may be disposed on the object side of the prism and may include a first lens and a second lens. The first lens may be disposed in the direction of the first optical axis C1. The second lens group may be disposed on the image side of the prism and may include a third lens to a sixth lens or a third lens to a seventh lens. The third lens to the sixth lens or the third lens to the seventh lens may be disposed in the direction of the second optical axis C2.

[0070] The prism may be disposed between the first lens group and the second lens group and may convert a path of incident light from the first optical axis C1 direction to the second optical axis C2 direction. The first optical axis C1 direction and the second optical axis C2 direction may be almost perpendicular to each other.

[0071] The optical imaging system according to the embodiment may satisfy the following conditional expression:

[0072] [Conditional expression 1] 0.400 <D2 / OAL1≤1.000

[0073] [Conditional Expression 2] 0.200 ≤ D1 / OAL2 ≤ 0.500

[0074] [Conditional Expression 3] 0.500 ≤ fLG1 / f ≤ 0.800

[0075] [Conditional Expression 4] 1.000 ≤ Fno × (fLG1 / f) ≤ 4.000

[0076] [Conditional Expression 5] 0.500≤|fLG2 / f|<1.300

[0077] [Conditional Expression 6] 0.500≤|fLG1 / fLG2|<1.300

[0078] [Conditional Expression 7] 0.500 ≤ FOV / OAL2 ≤ 0.600 (unit: mm -1 )

[0079] [Conditional Expression 8]8.000≤f / IMG HT≤12.000

[0080] [Conditional Expression 9] 1.500 ≤ OAL1 / IMG HT ≤ 2.500

[0081] In Conditional Expression 1, D2 is the maximum effective diameter of the second lens group, and OAL1 is the distance from the object side surface of the lens (or the first lens) disposed closest to the object side in the first lens group to the reflection surface of the prism on the first optical axis. Conditional Expression 1 may be related to the size (miniaturization) of a lens-guided optical system in which a lens is disposed on the object side of the prism.

[0082] In Conditional Expression 2, D1 is the maximum effective diameter of the first lens group, and OAL2 is the distance from the reflection surface of the prism to the imaging surface on the second optical axis. Conditional Expression 2 may be related to the brightness performance of a lens-guided telephoto camera in which a lens is provided on the object side of the prism.

[0083] In Conditional Expression 3, fLG1 is the focal length of the first lens group, and f is the focal length of the optical imaging system. Conditional Expression 3 may be related to the size (miniaturization) of the optical imaging system. According to Conditional Expression 3, as the power of the first lens group increases (or as the focal length decreases), the height of the second lens group may be reduced.

[0084] In Conditional Expression 4, Fno is the F value of the optical imaging system. Conditional Expression 4 may be related to the brightness performance of the telephoto camera.

[0085] In Conditional Expression 5 and Conditional Expression 6, fLG2 is the focal length of the second lens group. Conditional Expression 5 and Conditional Expression 6 can be related to the range of focal lengths of the first lens group and the second lens group to form an appropriate focal length for a telephoto camera.

[0086] In Conditional Expression 7, FOV is the field of view of the optical imaging system. Conditional Expression 7 is related to the size (miniaturization) of the optical imaging system, and when the optical imaging system has an appropriate field of view, miniaturization of the camera module can be easily achieved.

[0087] In conditional expression 8, IMG HT is half the diagonal length of the imaging plane. Conditional expression 8 is related to the range of the focal length of the telephoto camera, and conditional expression 9 is related to the ratio of the thickness of the module to the diagonal length of the imaging plane, and is a slim factor condition related to the size (miniaturization) of the optical imaging system.

[0088] In addition, the optical imaging system according to the embodiment may also satisfy the following conditional expression:

[0089] [Conditional Expression 10] 0.950 ≤ dP1 / ODL3 < 1.300

[0090] [Conditional Expression 11] 0.200<(R3-R4) / (R3+R4)<0.500

[0091] [Conditional Expression 12] 0.300 ≤ |R3 / fLG2| < 1.200

[0092] [Conditional Expression 13] 0.500 ≤ fLG1 / OAL ≤ 0.900

[0093] [Conditional Expression 14] 0.200 ≤ OAL1 / OAL2 ≤ 0.300

[0094] In conditional expression 10, dP1 is the distance from the incident surface of the prism to the reflection surface of the prism on the first optical axis, and ODL3 is half of the outer diameter of the lens (or the third lens) disposed closest to the object side in the second lens group. Conditional expression 10 is related to the size of the prism relative to the height of the second lens group. When this conditional expression is satisfied, the height of the second lens group can be low, and miniaturization of the module can be easily achieved.

[0095] In Conditional Expression 11, R3 and R4 are the curvature radii of the object-side surface and the image-side surface of the second lens, respectively. Conditional Expression 11 may be related to the shape condition of the second lens so that the first lens group has an appropriate focal length.

[0096] Conditional Expression 12 may be related to the shape condition of the second lens to ensure that the second lens group forms an appropriate focal length.

[0097] In Conditional Expression 13, OAL is the sum of OAL1 and OAL2. Conditional Expression 13 may be related to the range of the focal length of the first lens group to ensure that the optical imaging system has an appropriate size.

[0098] Conditional Expression 14 corresponds to a lens-guided optical system in which a lens is provided on the object side of the prism. In an example where this conditional expression is not satisfied, it may be difficult to manufacture a module having appropriate dimensions (length and thickness).

[0099] Hereinafter, an optical imaging system according to an embodiment will be described with reference to the accompanying drawings.

[0100] <First Embodiment>

[0101] Figure 1A is a diagram showing a configuration of an exemplary optical imaging system 100 according to the first embodiment. Figure 1Bis a diagram showing aberration characteristics of the exemplary optical imaging system 100 according to the first embodiment.

[0102] 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, a fifth lens 150 and a sixth lens 160 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 180 and an image sensor 190 arranged on the image side of the sixth lens 160.

[0103] The first lens 110 may have positive refractive power. 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 first lens 110 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 110 may be aspherical.

[0104] The second lens 120 may have a negative refractive power. 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. Specifically, the second lens 120 may be formed of a plastic material having optical properties different from those of the first lens 110 (e.g., refractive index and Abbe number). The second lens 120 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 120 may be aspherical.

[0105] The third lens 130 may have positive refractive power. The object side surface and the image side surface of the third lens 130 may be convex in the paraxial region. The third lens 130 may be formed of a plastic material. Specifically, the third lens 130 may be formed of a plastic material having optical properties different from those of the second lens 120 (e.g., refractive index and Abbe number). The third lens 130 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 130 may be aspherical.

[0106] The fourth lens 140 may have a negative refractive power. 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. Specifically, the fourth lens 140 may be formed of a plastic material having optical properties different from those of the third lens 130 (e.g., refractive index and Abbe number). The fourth lens 140 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 140 may be aspherical.

[0107] The fifth lens 150 may have a negative refractive power. The object side surface of the fifth lens 150 may be concave in the paraxial region, and the image side surface of the fifth lens 150 may be convex in the paraxial region. The fifth lens 150 may be formed of a plastic material. Specifically, the fifth lens 150 may be formed of a plastic material having optical properties different from those of the fourth lens 140 (e.g., refractive index and Abbe number). The fifth lens 150 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 150 may be aspherical.

[0108] The sixth lens 160 may have a negative refractive power. The object side surface of the sixth lens 160 may be convex in the paraxial region, and the image side surface of the sixth lens 160 may be concave in the paraxial region. The sixth lens 160 may be formed of a plastic material. Specifically, the sixth lens 160 may be formed of a plastic material having optical properties different from those of the fifth lens 150 (e.g., different refractive index and Abbe number). The sixth lens 160 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 160 may be aspherical.

[0109] In an example, the prism P may be disposed between the second lens 120 and the third lens 130. The first lens 110 and the second lens 120 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 130 to the sixth lens 160 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0110] Table 1 below lists optical and physical parameters of an exemplary optical imaging system 100 according to the first embodiment.

[0111] Table 1:

[0112]

[0113]

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

[0115] Table 2:

[0116]

[0117]

[0118] <Second Embodiment>

[0119] Figure 2Ais a diagram showing a configuration of an exemplary optical imaging system 200 according to the second embodiment. Figure 2B is a graph showing aberration characteristics of an exemplary optical imaging system 200 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, a fifth lens 250, a sixth lens 260 and a seventh lens 270 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 280 and an image sensor 290 arranged on the image side of the seventh lens 270.

[0121] The first lens 210 may have a positive refractive power. 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 first lens 210 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 210 may be aspherical.

[0122] The second lens 220 may have a negative refractive power. 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. Specifically, the second lens 120 may be formed of a plastic material having optical properties different from those of the first lens 210 (e.g., refractive index and Abbe number). The second lens 220 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 220 may be aspherical.

[0123] The third lens 230 may have positive refractive power. The object side surface 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. Specifically, the third lens 230 may be formed of a plastic material having optical properties different from those of the second lens 220 (e.g., refractive index and Abbe number). The third lens 230 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 230 may be aspherical.

[0124] The fourth lens 240 may have a negative refractive power. 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. Specifically, the fourth lens 240 may be formed of a plastic material having optical properties different from those of the third lens 230 (e.g., refractive index and Abbe number). The fourth lens 240 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 240 may be aspherical.

[0125] The fifth lens 250 may have a negative refractive power. The object side surface and the image side surface of the fifth lens 250 may be concave in the paraxial region. The fifth lens 250 may be formed of a plastic material. Specifically, the fifth lens 250 may be formed of a plastic material having optical properties different from those of the fourth lens 240 (e.g., refractive index and Abbe number). The fifth lens 250 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 250 may be aspherical.

[0126] The sixth lens 260 may have positive refractive power. The object side surface of the sixth lens 260 may be convex in the paraxial region, and the image side surface of the sixth lens 260 may be concave in the paraxial region. The sixth lens 260 may be formed of a plastic material. Specifically, the sixth lens 260 may be formed of a plastic material having optical properties different from those of the fifth lens 250 (e.g., refractive index and Abbe number). The sixth lens 260 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 260 may be aspherical.

[0127] The seventh lens 270 may have a negative refractive power. The object side surface of the seventh lens 270 may be convex in the paraxial region, and the image side surface of the seventh lens 270 may be concave in the paraxial region. The seventh lens 270 may be formed of a plastic material. Specifically, the seventh lens 270 may be formed of a plastic material having optical properties different from those of the sixth lens 260 (e.g., refractive index and Abbe number). The seventh lens 270 may be an aspherical lens. For example, the object side surface and the image side surface of the seventh lens 270 may be aspherical.

[0128] The prism P may be disposed between the second lens 220 and the third lens 230. The first lens 210 and the second lens 220 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 230 to the seventh lens 270 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0129] Table 3 below lists optical and physical parameters of an exemplary optical imaging system 200 according to the second embodiment.

[0130] Table 3:

[0131]

[0132]

[0133] Table 4 below lists aspherical surface data of the exemplary optical imaging system 200 according to the second embodiment.

[0134] Table 4:

[0135]

[0136]

[0137]

[0138] <Third Embodiment>

[0139] Figure 3A is a diagram showing a configuration of an exemplary optical imaging system 300 according to the third embodiment. Figure 3B is a graph showing aberration characteristics of an exemplary optical imaging system 300 according to the third embodiment.

[0140] 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, a fifth lens 350, a sixth lens 360 and a seventh lens 370 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 380 and an image sensor 390 arranged on the image side of the seventh lens 370.

[0141] The first lens 310 may have a positive refractive power. 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 first lens 310 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 310 may be aspherical.

[0142] The second lens 320 may have a negative refractive power. 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. Specifically, the second lens 320 may be formed of a plastic material having optical properties different from those of the first lens 310 (e.g., refractive index and Abbe number). The second lens 320 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 320 may be aspherical.

[0143] The third lens 330 may have a negative refractive power. 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. Specifically, the third lens 330 may be formed of a plastic material having optical properties different from those of the second lens 320 (e.g., refractive index and Abbe number). The third lens 330 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 330 may be aspherical.

[0144] The fourth lens 340 may have positive refractive power. The object side surface 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. Specifically, the fourth lens 340 may be formed of a plastic material having optical properties different from those of the third lens 330 (e.g., refractive index and Abbe number). The fourth lens 340 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 340 may be aspherical.

[0145] The fifth lens 350 may have a negative refractive power. The object side surface of the fifth lens 350 may be concave in the paraxial region, and the image side surface of the fifth lens 350 may be convex in the paraxial region. The fifth lens 350 may be formed of a plastic material. Specifically, the fifth lens 350 may be formed of a plastic material having optical properties different from those of the fourth lens 340 (e.g., refractive index and Abbe number). The fifth lens 350 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 350 may be aspherical.

[0146] The sixth lens 360 may have a negative refractive power. The object side surface and the image side surface of the sixth lens 360 may be concave in the paraxial region. The sixth lens 360 may be formed of a plastic material. Specifically, the sixth lens 360 may be formed of a plastic material having optical properties different from those of the fifth lens 350 (e.g., refractive index and Abbe number). The sixth lens 360 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 360 may be aspherical.

[0147] The seventh lens 370 may have a negative refractive power. The object side surface of the seventh lens 370 may be convex in the paraxial region, and the image side surface of the seventh lens 370 may be concave in the paraxial region. The seventh lens 370 may be formed of a plastic material. Specifically, the seventh lens 370 may be formed of a plastic material having optical properties different from those of the sixth lens 360 (e.g., refractive index and Abbe number). The seventh lens 370 may be an aspherical lens. For example, the object side surface and the image side surface of the seventh lens 370 may be aspherical.

[0148] In an example, the prism P may be disposed between the second lens 320 and the third lens 330. The first lens 310 and the second lens 320 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 330 to the seventh lens 370 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0149] Table 5 below lists optical and physical parameters of an exemplary optical imaging system 300 according to the third embodiment.

[0150] Table 5:

[0151] Face number Radius of curvature Thickness / distance Refractive Index Abbe number Semi-aperture object infinity infinity 1 infinity 0.000 2 5.289 1.200 1.544 56.0 3.00 3 58.294 0.075 2.93 4 8.564 0.350 1.639 23.5 2.78 5 5.253 1.385 2.57 6 infinity 2.250 1.834 37.3 2.10 7 infinity 2.250 1.834 37.3 3.30 8 infinity 2.268 1.76 9 -12.723 0.400 1.671 19.2 1.83 10 -13.020 0.110 1.81 11 21.351 0.677 1.660 20.4 1.76 12 -7.915 0.185 1.69 13 -5.063 0.400 1.639 23.5 1.62 14 -16.137 0.203 1.53 15 -10.443 0.824 1.614 25.9 1.51 16 104.007 0.307 1.45 17 10.888 0.400 1.544 56.0 1.42 18 9.279 3.000 1.38 19 infinity 0.210 1.518 64.2 1.63 20 infinity 9.026 1.64 Imaging surface infinity 2.56

[0152] Table 6 below lists aspherical surface data of the optical imaging system 300 according to the third embodiment of the present disclosure.

[0153] Table 6:

[0154]

[0155]

[0156] <Fourth Embodiment>

[0157] Figure 4A is a diagram showing a configuration of an exemplary optical imaging system 400 according to the fourth embodiment. Figure 4B is a graph showing aberration characteristics of an exemplary optical imaging system 400 according to the fourth embodiment.

[0158] 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, a fifth lens 450 and a sixth lens 460 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 480 and an image sensor 490 arranged on the image side of the sixth lens 460.

[0159] The first lens 410 may have a positive refractive power. The object side surface and the image side surface of the first lens 410 may be convex in the paraxial region. The first lens 410 may be formed of a plastic material. The first lens 410 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 410 may be aspherical.

[0160] The second lens 420 may have a negative refractive power. The object side surface of the second lens 420 may be convex in the paraxial region, and the image side surface of the second lens 420 may be concave in the paraxial region. The second lens 420 may be formed of a plastic material. Specifically, the second lens 420 may be formed of a plastic material having optical properties different from those of the first lens 410 (e.g., refractive index and Abbe number). The second lens 420 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 420 may be aspherical.

[0161] The third lens 430 may have positive refractive power. The object side surface and the image side surface of the third lens 430 may be convex in the paraxial region. The third lens 430 may be formed of a plastic material. Specifically, the third lens 430 may be formed of a plastic material having optical properties different from those of the second lens 420 (e.g., refractive index and Abbe number). The third lens 430 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 430 may be aspherical.

[0162] The fourth lens 440 may have a negative refractive power. 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. Specifically, the fourth lens 440 may be formed of a plastic material having optical properties different from those of the third lens 430 (e.g., refractive index and Abbe number). The fourth lens 440 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 440 may be aspherical.

[0163] The fifth lens 450 may have a negative refractive power. The object side surface of the fifth lens 450 may be concave in the paraxial region, and the image side surface of the fifth lens 450 may be convex in the paraxial region. The fifth lens 450 may be formed of a plastic material. Specifically, the fifth lens 450 may be formed of a plastic material having optical properties different from those of the fourth lens 440 (e.g., refractive index and Abbe number). The fifth lens 450 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 450 may be aspherical.

[0164] The sixth lens 460 may have a negative refractive power. The object side surface of the sixth lens 460 may be convex in the paraxial region, and the image side surface of the sixth lens 460 may be concave in the paraxial region. The sixth lens 460 may be formed of a plastic material. Specifically, the sixth lens 460 may be formed of a plastic material having optical properties different from those of the fifth lens 450 (e.g., refractive index and Abbe number). The sixth lens 460 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 460 may be aspherical.

[0165] In an example, the prism P may be disposed between the second lens 420 and the third lens 430. The first lens 410 and the second lens 420 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 430 to the sixth lens 460 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0166] Table 7 below lists optical and physical parameters of the optical imaging system 400 according to the fourth embodiment.

[0167] Table 7:

[0168] Face number Radius of curvature Thickness / distance Refractive Index Abbe number Semi-aperture object infinity infinity 1 infinity 0.000 2 5.239 1.200 1.544 56.0 3.00 3 -569.193 0.075 2.95 4 10.333 0.350 1.614 25.9 2.79 5 5.344 1.385 2.56 6 infinity 2.250 1.834 37.3 2.10 7 infinity 2.250 1.834 37.3 3.30 8 infinity 2.266 1.76 9 61.642 0.747 1.660 20.4 1.72 10 -6.163 0.137 1.65 11 -4.329 0.422 1.639 23.5 1.60 12 -12.964 0.217 1.52 13 -7.626 0.800 1.614 25.9 1.50 14 -22.921 0.278 1.46 15 13.629 0.400 1.544 56.0 1.42 16 9.852 3.000 1.38 17 infinity 0.210 1.518 64.2 1.63 18 infinity 9.062 1.64 Imaging surface infinity 2.56

[0169] Table 8 below lists aspherical surface data of an exemplary optical imaging system 400 according to the fourth embodiment.

[0170] Table 8:

[0171]

[0172]

[0173]

[0174] <Fifth Embodiment>

[0175] Figure 5A is a diagram showing a configuration of an exemplary optical imaging system 500 according to the fifth embodiment. Figure 5B is a graph showing aberration characteristics of an exemplary optical imaging system 500 according to the fifth embodiment.

[0176] 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, a fifth lens 550 and a sixth lens 560 arranged in sequence from the object side to the imaging surface, and may also include an infrared blocking filter 580 and an image sensor 590 arranged on the image side of the sixth lens 560.

[0177] The first lens 510 may have positive refractive power. The object side surface and the image side surface of the first lens 510 may be convex in the paraxial region. The first lens 510 may be formed of a plastic material. The first lens 510 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 510 may be aspherical.

[0178] The second lens 520 may have a negative refractive power. The object side surface of the second lens 520 may be convex in the paraxial region, and the image side surface of the second lens 520 may be concave in the paraxial region. The second lens 520 may be formed of a plastic material. Specifically, the second lens 520 may be formed of a plastic material having optical properties different from those of the first lens 510 (e.g., refractive index and Abbe number). The second lens 520 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 520 may be aspherical.

[0179] The third lens 530 may have positive refractive power. The object side surface and the image side surface of the third lens 530 may be convex in the paraxial region. The third lens 530 may be formed of a plastic material. Specifically, the third lens 530 may be formed of a plastic material having optical properties different from those of the second lens 520 (e.g., refractive index and Abbe number). The third lens 530 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 530 may be aspherical.

[0180] The fourth lens 540 may have a negative refractive power. 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. Specifically, the fourth lens 540 may be formed of a plastic material having optical properties different from those of the third lens 530 (e.g., in terms of refractive index and Abbe number). The fourth lens 540 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 540 may be aspherical.

[0181] The fifth lens 550 may have a negative refractive power. The object side surface of the fifth lens 550 may be concave in the paraxial region, and the image side surface of the fifth lens 550 may be convex in the paraxial region. The fifth lens 550 may be formed of a plastic material. Specifically, the fifth lens 550 may be formed of a plastic material having optical properties different from those of the fourth lens 540 (e.g., refractive index and Abbe number). The fifth lens 550 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 550 may be aspherical.

[0182] The sixth lens 560 may have a negative refractive power. The object side surface of the sixth lens 560 may be convex in the paraxial region, and the image side surface of the sixth lens 560 may be concave in the paraxial region. The sixth lens 560 may be formed of a plastic material. Specifically, the sixth lens 560 may be formed of a plastic material having optical properties different from those of the fifth lens 550 (e.g., refractive index and Abbe number). The sixth lens 560 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 560 may be aspherical.

[0183] In an example, the prism P may be disposed between the second lens 520 and the third lens 530. The first lens 510 and the second lens 520 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 530 to the sixth lens 560 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0184] Table 9 below lists optical and physical parameters of an exemplary optical imaging system 500 according to the fifth embodiment.

[0185] Table 9:

[0186]

[0187]

[0188] Table 10 below lists aspherical surface data of an exemplary optical imaging system 500 according to the fifth embodiment.

[0189] Table 10:

[0190]

[0191]

[0192]

[0193] <Sixth Implementation Method>

[0194] Fig. 6A is a diagram showing a configuration of an exemplary optical imaging system 600 according to the sixth embodiment. Figure 6B is a graph showing aberration characteristics of an exemplary optical imaging system 600 according to the sixth embodiment.

[0195] 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, a fifth lens 650 and a sixth lens 660 arranged in sequence from the object side to the imaging surface, and may also include an infrared blocking filter 680 and an image sensor 690 arranged on the image side of the sixth lens 660.

[0196] The first lens 610 may have positive refractive power. 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 first lens 610 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 610 may be aspherical.

[0197] The second lens 620 may have a negative refractive power. The object side surface of the second lens 620 may be convex in the paraxial region, and the image side surface of the second lens 620 may be concave in the paraxial region. The second lens 620 may be formed of a plastic material. Specifically, the second lens 620 may be formed of a plastic material having optical properties different from those of the first lens 610 (e.g., refractive index and Abbe number). The second lens 620 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 620 may be aspherical.

[0198] The third lens 630 may have positive refractive power. The object side surface and the image side surface of the third lens 630 may be convex in the paraxial region. The third lens 630 may be formed of a plastic material. Specifically, the third lens 630 may be formed of a plastic material having optical properties different from those of the second lens 620 (e.g., refractive index and Abbe number). The third lens 630 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 630 may be aspherical.

[0199] The fourth lens 640 may have a negative refractive power. 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. Specifically, the fourth lens 640 may be formed of a plastic material having optical properties different from those of the third lens 630 (e.g., refractive index and Abbe number). The fourth lens 640 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 640 may be aspherical.

[0200] The fifth lens 650 may have a negative refractive power. The object side surface of the fifth lens 650 may be concave in the paraxial region, and the image side surface of the fifth lens 650 may be convex in the paraxial region. The fifth lens 650 may be formed of a plastic material. Specifically, the fifth lens 650 may be formed of a plastic material having optical properties different from those of the fourth lens 640 (e.g., refractive index and Abbe number). The fifth lens 650 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 650 may be aspherical.

[0201] The sixth lens 660 may have a negative refractive power. The object side surface of the sixth lens 660 may be concave in the paraxial region, and the image side surface of the sixth lens 660 may be convex in the paraxial region. The sixth lens 660 may be formed of a plastic material. Specifically, the sixth lens 660 may be formed of a plastic material having optical properties different from those of the fifth lens 650 (e.g., refractive index and Abbe number). The sixth lens 660 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 660 may be aspherical.

[0202] In an example, the prism P may be disposed between the second lens 620 and the third lens 630. The first lens 610 and the second lens 620 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 630 to the sixth lens 660 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0203] Table 11 below lists optical and physical parameters of an exemplary optical imaging system 600 according to the sixth embodiment.

[0204] Table 11:

[0205]

[0206]

[0207] Table 12 below lists aspherical surface data of an exemplary optical imaging system 600 according to the sixth embodiment.

[0208] Table 12:

[0209]

[0210]

[0211] <Seventh Embodiment>

[0212] Fig. 7A is a diagram showing a configuration of an exemplary optical imaging system 700 according to the seventh embodiment. Figure 7B is a graph showing aberration characteristics of an exemplary optical imaging system 700 according to the seventh embodiment.

[0213] 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, a fifth lens 750, a sixth lens 760 and a seventh lens 770 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 780 and an image sensor 790 arranged on the image side of the seventh lens 770.

[0214] The first lens 710 may have positive refractive power. 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 first lens 710 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 710 may be aspherical.

[0215] The second lens 720 may have a negative refractive power. The object side surface of the second lens 720 may be convex in the paraxial region, and the image side surface of the second lens 720 may be concave in the paraxial region. The second lens 720 may be formed of a plastic material. Specifically, the second lens 720 may be formed of a plastic material having optical properties different from those of the first lens 710 (e.g., refractive index and Abbe number). The second lens 720 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 720 may be aspherical.

[0216] The third lens 730 may have positive refractive power. The object side surface and the image side surface of the third lens 730 may be convex in the paraxial region. The third lens 730 may be formed of a plastic material. Specifically, the third lens 730 may be formed of a plastic material having optical properties different from those of the second lens 720 (e.g., refractive index and Abbe number). The third lens 730 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 730 may be aspherical.

[0217] The fourth lens 740 may have a negative refractive power. 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. Specifically, the fourth lens 740 may be formed of a plastic material having optical properties different from those of the third lens 730 (e.g., refractive index and Abbe number). The fourth lens 740 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 740 may be aspherical.

[0218] The fifth lens 750 may have positive refractive power. The object side surface of the fifth lens 750 may be concave in the paraxial region, and the image side surface of the fifth lens 750 may be convex in the paraxial region. The fifth lens 750 may be formed of a plastic material. Specifically, the fifth lens 750 may be formed of a plastic material having optical properties different from those of the fourth lens 740 (e.g., refractive index and Abbe number). The fifth lens 750 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 750 may be aspherical.

[0219] The sixth lens 760 may have a negative refractive power. The object side surface of the sixth lens 760 may be concave in the paraxial region, and the image side surface of the sixth lens 760 may be convex in the paraxial region. The sixth lens 760 may be formed of a plastic material. Specifically, the sixth lens 760 may be formed of a plastic material having optical properties different from those of the fifth lens 750 (e.g., refractive index and Abbe number). The sixth lens 760 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 760 may be aspherical.

[0220] The seventh lens 770 may have a negative refractive power. The object side surface of the seventh lens 770 may be concave in the paraxial region, and the image side surface of the seventh lens 770 may be convex in the paraxial region. The seventh lens 770 may be formed of a plastic material. Specifically, the seventh lens 770 may be formed of a plastic material having optical properties different from those of the sixth lens 760 (e.g., refractive index and Abbe number). The seventh lens 770 may be an aspherical lens. For example, the object side surface and the image side surface of the seventh lens 770 may be aspherical.

[0221] In an example, the prism P may be disposed between the second lens 720 and the third lens 730. The first lens 710 and the second lens 720 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 730 to the seventh lens 770 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0222] Table 13 below lists optical and physical parameters of an exemplary optical imaging system 700 according to the seventh embodiment.

[0223] Table 13:

[0224]

[0225]

[0226] Table 14 below lists aspherical surface data of the exemplary optical imaging system 700 according to the seventh embodiment.

[0227] Table 14:

[0228]

[0229]

[0230] <Eighth Implementation Method>

[0231] Fig. 8A is a diagram showing a configuration of an exemplary optical imaging system 800 according to the eighth embodiment. Figure 8B is a graph showing aberration characteristics of an exemplary optical imaging system 800 according to the eighth embodiment.

[0232] 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, a fifth lens 850 and a sixth lens 860 arranged in sequence from the object side to the imaging surface, and may also include an infrared blocking filter 880 and an image sensor 890 arranged on the image side of the sixth lens 860.

[0233] The first lens 810 may have positive refractive power. 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 first lens 810 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 810 may be aspherical.

[0234] The second lens 820 may have a negative refractive power. 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. Specifically, the second lens 820 may be formed of a plastic material having optical properties different from those of the first lens 810 (e.g., refractive index and Abbe number). The second lens 820 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 820 may be aspherical.

[0235] The third lens 830 may have positive refractive power. The object side surface and the image side surface of the third lens 830 may be convex in the paraxial region. The third lens 830 may be formed of a plastic material. Specifically, the third lens 830 may be formed of a plastic material having optical properties different from those of the second lens 820 (e.g., refractive index and Abbe number). The third lens 830 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 830 may be aspherical.

[0236] The fourth lens 840 may have a negative refractive power. 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. Specifically, the fourth lens 840 may be formed of a plastic material having optical properties different from those of the third lens 830 (e.g., refractive index and Abbe number). The fourth lens 840 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 840 may be aspherical.

[0237] The fifth lens 850 may have a negative refractive power. The object side surface of the fifth lens 850 may be concave in the paraxial region, and the image side surface of the fifth lens 850 may be convex in the paraxial region. The fifth lens 850 may be formed of a plastic material. Specifically, the fifth lens 850 may be formed of a plastic material having optical properties different from those of the fourth lens 840 (e.g., refractive index and Abbe number). The fifth lens 850 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 850 may be aspherical.

[0238] The sixth lens 860 may have a negative refractive power. The object side surface of the sixth lens 860 may be concave in the paraxial region, and the image side surface of the sixth lens 860 may be convex in the paraxial region. The sixth lens 860 may be formed of a plastic material. Specifically, the sixth lens 860 may be formed of a plastic material having optical properties different from those of the fifth lens 850 (e.g., refractive index and Abbe number). The sixth lens 860 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 860 may be aspherical.

[0239] In an example, the prism P may be disposed between the second lens 820 and the third lens 830. The first lens 810 and the second lens 820 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 830 to the sixth lens 860 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0240] Table 15 below lists optical and physical parameters of an exemplary optical imaging system 800 according to the eighth embodiment.

[0241] Table 15:

[0242]

[0243]

[0244] Table 16 below lists aspherical surface data of an exemplary optical imaging system 800 according to the eighth embodiment.

[0245] Table 16:

[0246]

[0247]

[0248]

[0249] <Ninth Embodiment>

[0250] Fig. 9A is a diagram showing a configuration of an exemplary optical imaging system 900 according to a ninth embodiment. Fig. 9B is a graph showing aberration characteristics of an exemplary optical imaging system 900 according to the ninth embodiment.

[0251] 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, a fifth lens 950 and a sixth lens 960 arranged in sequence from the object side to the imaging surface, and may also include an infrared blocking filter 980 and an image sensor 990 arranged on the image side of the sixth lens 960.

[0252] The first lens 910 may have positive refractive power. The object side surface and the image side surface of the first lens 910 may be convex in the paraxial region. The first lens 910 may be formed of a plastic material. The first lens 910 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 910 may be aspherical.

[0253] The second lens 920 may have a negative refractive power. 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. Specifically, the second lens 920 may be formed of a plastic material having optical properties different from those of the first lens 910 (e.g., refractive index and Abbe number). The second lens 920 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 920 may be aspherical.

[0254] The third lens 930 may have positive refractive power. The object side and image side of the third lens 930 may be convex in the paraxial region. The third lens 930 may be formed of a plastic material. Specifically, the third lens 930 may be formed of a plastic material having optical properties different from those of the second lens 920 (e.g., refractive index and Abbe number). The third lens 930 may be an aspherical lens. For example, the object side and image side of the third lens 930 may be aspherical.

[0255] The fourth lens 940 may have a negative refractive power. 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. Specifically, the fourth lens 940 may be formed of a plastic material having optical properties different from those of the third lens 930 (e.g., different refractive index and Abbe number). The fourth lens 940 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 940 may be aspherical.

[0256] The fifth lens 950 may have a negative refractive power. The object side surface of the fifth lens 950 may be concave in the paraxial region, and the image side surface of the fifth lens 950 may be convex in the paraxial region. The fifth lens 950 may be formed of a plastic material. Specifically, the fifth lens 950 may be formed of a plastic material having optical properties different from those of the fourth lens 940 (e.g., refractive index and Abbe number). The fifth lens 950 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 950 may be aspherical.

[0257] The sixth lens 960 may have a negative refractive power. The object side surface of the sixth lens 960 may be concave in the paraxial region, and the image side surface of the sixth lens 960 may be convex in the paraxial region. The sixth lens 960 may be formed of a plastic material. Specifically, the sixth lens 960 may be formed of a plastic material having optical properties different from those of the fifth lens 950 (e.g., refractive index and Abbe number). The sixth lens 960 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 960 may be aspherical.

[0258] In an example, the prism P may be disposed between the second lens 920 and the third lens 930. The first lens 910 and the second lens 920 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 930 to the sixth lens 960 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0259] Table 17 below lists optical and physical parameters of an exemplary optical imaging system 900 according to the ninth embodiment.

[0260] Table 17:

[0261]

[0262]

[0263] Table 18 below lists aspherical surface data of an exemplary optical imaging system 900 according to the ninth embodiment.

[0264] Table 18:

[0265]

[0266]

[0267] <Tenth Implementation Method>

[0268] Fig. 10A is a diagram showing a configuration of an exemplary optical imaging system 1000 according to a tenth embodiment. Fig. 10B is a graph showing aberration characteristics of an exemplary optical imaging system 1000 according to the tenth embodiment.

[0269] 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, a fifth lens 1050 and a sixth lens 1060 arranged in sequence from the object side toward the imaging surface, and may also include an infrared blocking filter 1080 and an image sensor 1090 arranged on the image side of the sixth lens 1060.

[0270] The first lens 1010 may have positive refractive power. The object side surface and the image side surface of the first lens 1010 may be convex in the paraxial region. The first lens 1010 may be formed of a plastic material. The first lens 1010 may be an aspherical lens. For example, the object side surface and the image side surface of the first lens 1010 may be aspherical.

[0271] The second lens 1020 may have a negative refractive power. 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. Specifically, the second lens 1020 may be formed of a plastic material having optical properties different from those of the first lens 1010 (e.g., refractive index and Abbe number). The second lens 1020 may be an aspherical lens. For example, the object side surface and the image side surface of the second lens 1020 may be aspherical.

[0272] The third lens 1030 may have positive refractive power. The object side surface and the image side surface of the third lens 1030 may be convex in the paraxial region. The third lens 1030 may be formed of a plastic material. Specifically, the third lens 1030 may be formed of a plastic material having optical properties different from those of the second lens 1020 (e.g., refractive index and Abbe number). The third lens 1030 may be an aspherical lens. For example, the object side surface and the image side surface of the third lens 1030 may be aspherical.

[0273] The fourth lens 1040 may have a negative refractive power. The object side surface and the image side surface of the fourth lens 1040 may be concave in the paraxial region. The fourth lens 1040 may be formed of a plastic material. Specifically, the fourth lens 1040 may be formed of a plastic material having optical properties different from those of the third lens 1030 (e.g., refractive index and Abbe number). The fourth lens 1040 may be an aspherical lens. For example, the object side surface and the image side surface of the fourth lens 1040 may be aspherical.

[0274] The fifth lens 1050 may have positive refractive power. The object side surface and the image side surface of the fifth lens 1050 may be convex in the paraxial region. The fifth lens 1050 may be formed of a plastic material. Specifically, the fifth lens 1050 may be formed of a plastic material having optical properties different from those of the fourth lens 1040 (e.g., refractive index and Abbe number). The fifth lens 1050 may be an aspherical lens. For example, the object side surface and the image side surface of the fifth lens 1050 may be aspherical.

[0275] The sixth lens 1060 may have a negative refractive power. The object side surface of the sixth lens 1060 may be concave in the paraxial region, and the image side surface of the sixth lens 1060 may be convex in the paraxial region. The sixth lens 1060 may be formed of a plastic material. Specifically, the sixth lens 1060 may be formed of a plastic material having optical properties different from those of the fifth lens 1050 (e.g., refractive index and Abbe number). The sixth lens 1060 may be an aspherical lens. For example, the object side surface and the image side surface of the sixth lens 1060 may be aspherical.

[0276] In an example, the prism P may be disposed between the second lens 1020 and the third lens 1030. The first lens 1010 and the second lens 1020 may be disposed on the object side with respect to the prism P and may be included in the first lens group LG1, and the third lens 1030 to the sixth lens 1060 may be disposed on the image side with respect to the prism P and may be included in the second lens group LG2. The first lens group LG1 may have positive refractive power, and the second lens group LG2 may have negative refractive power.

[0277] Table 19 below lists optical and physical parameters of an exemplary optical imaging system 1000 according to the tenth embodiment.

[0278] Table 19:

[0279]

[0280]

[0281] Table 20 below lists aspherical surface data of the exemplary optical imaging system 1000 according to the tenth embodiment.

[0282] Table 20:

[0283]

[0284]

[0285] Table 21 below lists optical and physical parameters related to the focal length and conditional expressions of the optical imaging system according to the disclosed embodiments.

[0286] Table 21:

[0287]

[0288] According to the aforementioned embodiments, the optical imaging system according to the embodiments may have the effect of improving weak-light imaging performance.

[0289] Although the present disclosure includes specific embodiments, it will be apparent after understanding the disclosure of the present application that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are considered to be descriptive only and not for limiting purposes. The description of features or aspects in each example is considered to be applicable 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 systems, architectures, devices, or circuits are combined in different ways and / or replaced or supplemented by other components or their equivalents.

[0290] Therefore, in addition to the disclosure above and all accompanying drawings, the scope of the present disclosure also includes the claims and their equivalents, and all changes within the scope of the claims and their equivalents will be construed as being included in the present disclosure.

Claims

1. An optical imaging system, characterized in that: include: A first lens group includes at least one lens arranged in the direction of a first optical axis; A second lens group includes at least one lens arranged in a second optical axis direction perpendicular to the first optical axis direction; as well as a prism disposed between the first lens group and the second lens group and configured to convert a path of incident light from the first optical axis direction to the second optical axis direction, Among them, the conditional expression 0.200≤D1 / OAL2≤0.500 is satisfied. Wherein, D1 is the maximum effective diameter of the first lens group, and OAL2 is the distance from the reflection surface to the imaging surface of the prism on the second optical axis.

2. The optical imaging system according to claim 1, characterized in that: The first lens group comprises: A first lens having positive refractive power; and The second lens has negative refractive power and a meniscus shape that is convex toward the object side.

3. The optical imaging system according to claim 1, characterized in that: The second lens group includes a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence in the direction of the second optical axis, and Wherein, the third lens and the fourth lens have opposite refractive powers.

4. The optical imaging system according to claim 1, characterized in that: Satisfying the conditional expression 0.500≤fLG1 / f≤0.800, Wherein, fLG1 is the focal length of the first lens group, and f is the focal length of the optical imaging system.

5. The optical imaging system according to claim 1, characterized in that: Satisfy the conditional expression 1.500≤OAL1 / IMG HT≤2.500, Wherein, OAL1 is the distance from the object side surface of the lens disposed closest to the object side in the first lens group to the reflection surface of the prism on the first optical axis, and IMG HT is half of the diagonal length of the imaging surface.

6. The optical imaging system according to claim 1, characterized in that: Satisfy the conditional expression 0.500≤FOV / OAL2≤0.600, the unit of the conditional expression is mm -1 , Wherein, FOV is the field of view of the optical imaging system.

7. The optical imaging system according to claim 1, characterized in that: Satisfies the conditional expression 0.400 <D2 / OAL1≤1.000, Wherein, D2 is the maximum effective diameter of the second lens group, and OAL1 is the distance from the object side surface of the lens disposed closest to the object side in the first lens group to the reflection surface of the prism on the first optical axis.

8. The optical imaging system according to claim 3, characterized in that: The second lens group also includes a seventh lens that is disposed on the image side of the sixth lens and has negative refractive power.

9. An optical imaging system, characterized in that: include: A first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens are arranged in sequence from the object side toward the imaging surface; as well as a prism disposed between the second lens and the third lens and configured to convert a path of incident light from a first optical axis direction to a second optical axis direction, wherein the first lens and the second lens are disposed on an object side of the prism and included in a first lens group, and the third lens to the sixth lens are disposed on an image side of the prism and included in a second lens group, and Among them, the conditional expression 0.400 is satisfied <D2 / OAL1≤1.000, Wherein, D2 is the maximum effective diameter of the second lens group, and OAL1 is the distance from the object side surface of the first lens to the reflection surface of the prism on the first optical axis.

10. The optical imaging system according to claim 9, characterized in that: The third lens has positive refractive power, a convex object-side surface and a convex image-side surface.

11. The optical imaging system according to claim 9, characterized in that: The fourth lens element has negative refractive power, a concave object-side surface and a convex image-side surface.

12. The optical imaging system according to claim 9, characterized in that: The second lens group also includes a seventh lens that is disposed on the image side of the sixth lens and has negative refractive power.

13. The optical imaging system according to claim 9, characterized in that: The second lens has negative refractive power and has a meniscus shape that is convex toward the object side.

14. The optical imaging system according to claim 9, characterized in that: The object-side surface of the fifth lens is concave.

15. The optical imaging system according to claim 9, characterized in that: The sixth lens has negative refractive power.

16. The optical imaging system according to claim 9, characterized in that: Satisfy the conditional expression 0.200≤OAL1 / OAL2≤0.300, Wherein, OAL2 is the distance from the reflection surface of the prism to the imaging surface on the second optical axis.

17. An optical imaging system, characterized in that: include: A first lens group includes at least one lens arranged in the direction of a first optical axis; A second lens group includes at least four lenses arranged in a second optical axis direction perpendicular to the first optical axis direction; as well as a prism disposed between the first lens group and the second lens group and configured to convert a path of incident light from the first optical axis direction to the second optical axis direction, wherein the conditional expression 0.400 is satisfied <D2 / OAL1≤1.000, Wherein, D2 is the maximum effective diameter of the second lens group, and OAL1 is the distance from the object side surface of the first lens disposed closest to the object side in the first lens group to the reflection surface of the prism on the first optical axis.

18. The optical imaging system according to claim 17, characterized in that: The first lens group includes the first lens having a convex object-side surface and a concave image-side surface.

19. The optical imaging system according to claim 17, characterized in that: The second lens group has negative refractive power.

Images