Optical image capturing system

Abstract

The optical imaging system includes a first lens, a second lens, a third lens having a positive refractive power, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from an object side, and satisfies OAL / IMG HT / 2lt; 0.6, where OAL is the distance from the object-side surface of the first lens to the imaging surface, and IMG HT is equal to half the diagonal length of the imaging surface.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application Nos. 10 - 2021 - 0104802, filed on August 9, 2021, and 10 - 2021 - 0176899, filed on December 10, 2021, with the Korean Intellectual Property Office, the entire disclosures of which are incorporated herein by reference for all purposes. Technical field

[0003] The following description relates to an optical imaging system, and more particularly, to an optical imaging system having an ultra - thin thickness. Background art

[0004] Sensors of various optical systems having 13 million to 200 million pixels have been developed, and lenses applied to such sensors have also been developed. As the number of pixels increases, the size of the sensor increases, and the total length of the lens increases. Accordingly, the size of the camera module increases, such that the thickness of the camera module may become greater than the thickness of a mobile phone. In this case, due to the camera module, the rear surface of the mobile phone cannot be set as a flat surface, which may cause inconvenience in using the mobile phone or damage the appearance of the mobile phone. Therefore, there is a need for an optical imaging system having a reduced thickness while being applied to a high - resolution camera. Summary of the invention

[0005] The Summary of the Invention section is provided to introduce, in a brief form, selections of inventive concepts, which will be further described in the Detailed Description section below. The Summary of the Invention section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0006] In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens having a positive refractive power, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged from the object side, where OAL / IMG HT / 2 < 0.6, where OAL is the distance from the object side surface of the first lens to the imaging surface, and IMG HT is equal to half of the diagonal length of the imaging surface.

[0007] The optical imaging system may satisfy at least one of 30 < v1 - v2 < 70, 5 < v1 - v3 < 55, and 30 < v1 - v4 < 70, where v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, v3 is the Abbe number of the third lens, and v4 is the Abbe number of the fourth lens.

[0008] The optical imaging system can satisfy 0 < f1 / f < 1.4, where f is the total focal length of the optical imaging system and f1 is the focal length of the first lens.

[0009] The optical imaging system can satisfy -9 < f2 / f < -2, where f is the total focal length of the optical imaging system and f2 is the focal length of the second lens.

[0010] The optical imaging system can satisfy 3 < |f4 / f| < 70, where f is the total focal length of the optical imaging system and f4 is the focal length of the fourth lens.

[0011] The optical imaging system can satisfy 2 < |f5 / f| < 50, where f is the total focal length of the optical imaging system and f5 is the focal length of the fifth lens.

[0012] The optical imaging system can satisfy -3 < f7 / f < 0, where f is the total focal length of the optical imaging system and f7 is the focal length of the seventh lens.

[0013] The optical imaging system can satisfy OAL / f < 1.3 and BFL / f < 0.3, where f is the total focal length of the optical imaging system and BFL is the distance on the optical axis from the image side of the seventh lens to the imaging surface.

[0014] The optical imaging system can satisfy f1 / f2 < 0, where f1 is the focal length of the first lens and f2 is the focal length of the second lens.

[0015] The optical imaging system can satisfy 0 < f1 / f3, where f1 is the focal length of the first lens and f3 is the focal length of the third lens.

[0016] The optical imaging system can satisfy D1 / f < 0.1, where D1 is the distance on the optical axis between the image side of the first lens and the object side of the second lens, and f is the total focal length of the optical imaging system.

[0017] The optical imaging system can satisfy 70 < FOV × IMG HT / f, where f is the total focal length of the optical imaging system and FOV is the field of view of the optical imaging system.

[0018] The optical imaging system can satisfy at least one of -0.1 < SAG42 / OAL < 0, -0.2 < SAG52 / OAL < 0, -0.2 < SAG62 / OAL < 0, and -0.3 < SAG72 / OAL < 0, where SAG42 is the SAG value at the distal end of the effective diameter of the image side of the fourth lens, SAG52 is the SAG value at the distal end of the effective diameter of the image side of the fifth lens, SAG62 is the SAG value at the distal end of the effective diameter of the image side of the sixth lens, and SAG72 is the SAG value at the distal end of the effective diameter of the image side of the seventh lens.

[0019] The optical imaging system may satisfy that the first lens has positive refractive power, the second lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power.

[0020] The optical imaging system may satisfy that at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is a glass lens.

[0021] Other features and aspects will become apparent from the appended claims, the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A is a cross-sectional view showing an optical imaging system according to a first example.

[0023] Figure 1B is a graph showing aberration characteristics of the optical imaging system according to the first example.

[0024] Figure 2A is a cross-sectional view showing an optical imaging system according to a second example.

[0025] Figure 2B is a graph showing aberration characteristics of the optical imaging system according to the second example.

[0026] Figure 3A is a cross-sectional view showing an optical imaging system according to a third example.

[0027] Figure 3B is a graph showing aberration characteristics of the optical imaging system according to the third example.

[0028] Figure 4A is a cross-sectional view showing an optical imaging system according to a fourth example.

[0029] Figure 4B is a graph showing aberration characteristics of the optical imaging system according to the fourth example.

[0030] Figure 5A is a cross-sectional view showing an optical imaging system according to a fifth example.

[0031] Figure 5B is a graph showing aberration characteristics of the optical imaging system according to the fifth example.

[0032] FIG. 6 a is a cross-sectional view showing an optical imaging system according to a sixth example.

[0033] Figure 6B is a graph showing aberration characteristics of the optical imaging system according to the sixth example.

[0034] Fig. 7A is a cross-sectional view showing an optical imaging system according to a seventh example.

[0035] Figure 7B is a graph showing aberration characteristics of the optical imaging system according to the seventh example.

[0036] Fig. 8A is a cross-sectional view showing an optical imaging system according to an eighth example.

[0037] Figure 8B is a graph showing aberration characteristics of the optical imaging system according to the eighth example.

[0038] Fig.9A is a cross-sectional view showing an optical imaging system according to a ninth example.

[0039] Fig. 9B is a graph showing aberration characteristics of the optical imaging system according to the ninth example.

[0040] Fig. 10A is a cross-sectional view showing an optical imaging system according to a tenth example.

[0041] Fig. 10B is a graph showing aberration characteristics of the optical imaging system according to the tenth example.

[0042] Fig.11A is a cross-sectional view showing an optical imaging system according to an eleventh example.

[0043] Fig. 11B is a graph showing aberration characteristics of the optical imaging system according to the eleventh example.

[0044] Throughout the drawings and detailed description, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0045] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent to those of ordinary skill in the art. The order of operations described herein is merely an example, and except for operations that must occur in a particular order, it is not limited to the order set forth herein, but may be changed, which will be apparent to those of ordinary skill in the art. In addition, for greater clarity and brevity, descriptions of functions and structures well known to those of ordinary skill in the art may be omitted.

[0046] The features described herein may be implemented in different forms and should not be understood as being limited to the examples described herein. Rather, the examples described herein have been provided so that this disclosure will be thorough and complete and will fully convey the scope of this disclosure to those of ordinary skill in the art.

[0047] It should be noted that in this document, use of the word "may" with respect to an example or implementation (e.g., with respect to what an example or implementation may include or implement) means that there is at least one example or implementation that includes or implements such features, and all examples and implementations are not limited thereto.

[0048] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, no other elements may be present between the element and the other element.

[0049] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0050] Although terms such as "first", "second" and "third" may be used herein to describe various members, components, regions, layers or portions, these members, components, regions, layers or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer or portion from another member, component, region, layer or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer or first portion mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second portion.

[0051] Spatially relative terms such as "above", "higher", "below", and "lower" may be used herein for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both orientations of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0052] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the articles "a", "an" and "the" are intended to include plural forms as well. The words "include", "comprise" and "have" indicate the presence of the features, numbers, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

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

[0054] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have multiple configurations, other configurations that will be apparent after understanding the disclosure of the present application are also feasible.

[0055] In the drawings, for the sake of convenience of explanation, the thickness, size and shape of the lens are slightly exaggerated. Specifically, the shapes of the spherical surface or aspherical surface shown in the drawings are shown by way of example. That is, the shapes of the spherical surface or aspherical surface are not limited to those shown in the drawings.

[0056] The optical imaging system according to various examples may be installed in a mobile electronic device. For example, the optical imaging system may be a component of a camera module installed in the mobile electronic device. The mobile electronic device may be a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet personal computer (PC).

[0057] In various examples, the first lens (or front-most lens) refers to the lens closest to the object side, and the last lens (or rear-most lens) refers to the lens closest to the image sensor.

[0058] In the following, when describing the configuration of each lens, the image side may refer to, for example, the direction in which the imaging plane on which the image is formed is located or the direction in which the image sensor is located, and the object side may refer to the direction in which the object is located. In addition, the object side surface of the lens may refer to, for example, the lens surface on the side in which the object is located relative to the optical axis, and the image side surface of the lens may refer to the lens surface on the side in which the imaging plane is located relative to the optical axis. The imaging surface may be, for example, an imaging device surface or an image sensor surface. The image sensor may include, for example, a sensor such as a complementary metal oxide semiconductor (CMOS) sensor or a charge coupled device (CCD). The image sensor is not limited thereto, and may be, for example, a device that converts an image of an object into an electrical image signal.

[0059] In various examples, the radius of curvature and thickness, TTL, IMG HT (1 / 2 of the diagonal length of the imaging plane), and focal length of the lens are all expressed in millimeters (mm). In addition, the thickness of the lens, the gap between lenses, and TTL are distances on the optical axis of the lens. In addition, in the description of the shape of the lens, one face of the lens is convex, which means that the optical axis portion of the corresponding surface is convex, and one face of the lens is concave, which means that the optical axis portion of the corresponding surface is concave. Therefore, although one face of the lens is described as convex, the edge portion of the lens may be concave. Similarly, although one face of the lens is described as concave, the edge portion of the lens may be convex.

[0060] The optical imaging system according to various examples may include seven lenses. The optical imaging system may include an infrared (IR) filter disposed between the seventh lens and the image sensor. Although not shown, the optical imaging system may include an aperture. The optical imaging system may include a total of seven lenses having refractive power.

[0061] In an example, two lenses adjacent to each other among the lenses of the optical imaging system may be spaced apart from each other in the optical axis direction.

[0062] The optical imaging system may include at least one aspherical lens. In an example, at least one of the object side surface or the image side surface of at least one lens constituting the optical imaging system may be aspherical. An aspherical lens refers to a lens having at least one of its object side surface and image side surface aspherical.

[0063] The aspherical surface of each of the lenses can be expressed by the following Equation 1:

[0064] [Equation 1]

[0065]

[0066] In Equation 1, c is the curvature of the lens surface and is equal to the inverse of the radius of curvature of the lens surface at the optical axis of the lens surface, K is the cone constant, Y is the distance from any point on the lens surface to the optical axis of the lens surface in a direction perpendicular to the optical axis of the lens surface, A to P are aspheric constants, and Z (also known as SAG) is the distance from a point on the lens surface at a distance Y from the optical axis of the lens surface to a tangent plane perpendicular to the optical axis and intersecting the vertex of the lens surface in a direction parallel to the optical axis of the lens surface.

[0067] In an example, at least one of the object-side surface or the image-side surface of at least one of the lenses constituting the optical imaging system may include an inflection point. As an example, at least one of the object-side surface and the image-side surface of the lens may be concave in the paraxial region and may be convex in the off-axis region. As another example, at least one of the object-side surface and the image-side surface of the lens may be convex in the paraxial region and may be concave in the off-axis region.

[0068] In various examples, the lens can be formed of plastic or glass. In at least some examples, the lens can be formed of injection molded plastic. However, other transparent optical materials can also be used as the material of the lens. In addition, in various examples, the remaining lens elements can be formed of materials with other optical properties (e.g., other Abbe numbers and / or other refractive indices).

[0069] In one example, one or more lenses may have other shapes, such as an elliptical shape, a rectangular shape, a square shape, or a rectangular shape with rounded corners. In an exemplary embodiment, the lens may have a D-cut shape. For example, the lens may have a shorter length in a first axis (Y axis) direction perpendicular to the optical axis (Z axis) than in a second axis (X axis) direction perpendicular to both the optical axis (Z axis) and the first axis (Y axis) directions.

[0070] The optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an image sensor, which are sequentially arranged from an object side toward an image side.

[0071] The optical imaging system may include at least one glass lens. For example, at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be formed of glass. The optical imaging system may include a glass lens to have improved resolution.

[0072] The first lens may have positive refractive power. The object side surface of the first lens may be convex in the paraxial region. The image side surface of the first lens may be concave in the paraxial region. At least one of the object side surface and the image side surface of the first lens may be aspherical.

[0073] The second lens may have negative refractive power. The object side surface of the second lens may be convex in the paraxial region. The image side surface of the second lens may be concave in the paraxial region. The object side surface of the second lens may be aspherical. The image side surface of the second lens may be aspherical.

[0074] The third lens may have positive refractive power. The object side surface of the third lens may be convex in the paraxial region. The image side surface of the third lens may be concave or convex in the paraxial region. At least one of the object side surface and the image side surface of the third lens may be aspherical.

[0075] The fourth lens may have a refractive power. The object side surface of the fourth lens may be concave or convex in the paraxial region. The image side surface of the fourth lens may be concave or convex in the paraxial region. At least one of the object side surface and the image side surface of the fourth lens may be aspherical.

[0076] The fifth lens may have a refractive power. The object side surface of the fifth lens may be convex in the paraxial region. The image side surface of the fifth lens may be concave in the paraxial region. At least one of the object side surface and the image side surface of the fifth lens may be aspherical.

[0077] The sixth lens may have positive refractive power. The object side surface of the sixth lens may be convex in the paraxial region. The image side surface of the sixth lens may be concave or convex in the paraxial region. At least one of the object side surface and the image side surface of the sixth lens may be aspherical.

[0078] The seventh lens may have negative refractive power. The object side surface of the seventh lens may be concave or convex in the paraxial region. The image side surface of the seventh lens may be concave in the paraxial region. At least one of the object side surface and the image side surface of the seventh lens may be aspherical.

[0079] In an example, at least one of the seven lenses constituting the optical imaging system may be formed of glass. In an example, at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be a glass lens. For example, the first lens may be a glass lens. A material with a high Abbe number can be used to reduce chromatic aberration of the optical imaging system. Since the Abbe number of glass is relatively greater than that of plastic, the glass lens may be advantageous in ensuring high resolution. For example, the first lens may be formed of glass so that the conditional expression (2) (“30 < v1 - v2 < 70” or “40 < v1 - v2 < 70”) can be relatively easily satisfied.

[0080] The optical imaging system may be configured to satisfy at least one of the following conditional expressions:

[0081] Conditional expression (1): 0 < f1 / f < 1.4

[0082] Conditional expression (2): 30 < v1 - v2 < 70

[0083] Conditional expression (3): 5 < v1 - v3 < 55

[0084] Conditional expression (4): 30 < v1 - v4 < 70

[0085] Conditional expression (5): -9 < f2 / f < -2

[0086] Conditional expression (6): 2 < f3 / f < 10

[0087] Conditional expression (7): 3 < |f4 / f| < 70

[0088] Conditional expression (8): 2 < |f5 / f| < 50

[0089] Conditional expression (9): 0.5 < f6 / f < 5

[0090] Conditional expression (10): -3 < f7 / f < 0

[0091] Conditional expression (11): OAL / f < 1.3

[0092] Conditional expression (12): f1 / f2 < 0

[0093] Conditional expression (13): 0 < f1 / f3

[0094] Conditional expression (14): BFL / f < 0.3

[0095] Conditional expression (15): D1 / f < 0.1

[0096] Conditional expression (16): OAL / IMG HT / 2 < 0.6

[0097] Conditional expression (17): 70 < FOV × IMG HT / f

[0098] Conditional expression (18): -0.1 < SAG42 / OAL < 0

[0099] Conditional expression (19): -0.2 < SAG52 / OAL < 0

[0100] Conditional expression (20): -0.2 < SAG62 / OAL < 0, and

[0101] Conditional expression (21): -0.3 < SAG72 / OAL < 0.

[0102] In the conditional expressions, f is the total 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, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0103] In the conditional expressions, v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, v3 is the Abbe number of the third lens, and v4 is the Abbe number of the fourth lens.

[0104] In the conditional expressions, OAL is the distance from the object side surface of the first lens to the imaging surface, and BFL is the distance from the image side surface of the seventh lens to the imaging surface.

[0105] In the conditional expressions, D1 is the air gap between the first lens and the second lens. IMG HT is equal to half of the diagonal length of the imaging surface. FOV is the field of view of the optical imaging system.

[0106] In the conditional expressions, SAG42 is the SAG value at the distal end of the effective diameter on the image side surface of the fourth lens, SAG52 is the SAG value at the distal end of the effective diameter on the image side surface of the fifth lens, SAG62 is the SAG value at the distal end of the effective diameter on the image side surface of the sixth lens. SAG72 is the SAG value at the distal end of the effective diameter on the image side surface of the seventh lens. SAG is the distance between a certain point at a distance Y on the aspherical surface of the lens and the tangent plane intersecting the vertex of the aspherical surface of the lens.

[0107] When the value of SAG is negative (-), this means that the distal end of the effective diameter of the aspherical surface of the lens is closer to the object side than the vertex of the aspherical surface of the lens.

[0108] Conditional Expression (1) is a condition regarding the ratio of the focal length of the first lens to the total focal length of the optical imaging system, and when f1 / f is outside the range of Conditional Expression (1), an appropriate level of refractive power may not be maintained.

[0109] Conditional expressions (2), (3) and (4) are conditions for defining the Abbe number of a material, and chromatic aberration can be minimized only when v1-v2, v1-v3 and v1-v4 are within the ranges of conditional expressions (2), (3) and (4).

[0110] Regarding conditional expression (2), in the optical imaging system, 30 <v1-v2<70。

[0111] Conditional expression (5) is a condition regarding the ratio of the focal length of the second lens to the total focal length of the optical imaging system, and when f2 / f is outside the range of conditional expression (5), appropriate refractive power may not be maintained, making it difficult to correct aberrations.

[0112] Conditional expression (6) is a condition regarding the ratio of the focal length of the third lens to the total focal length of the optical imaging system, and when f3 / f is outside the range of conditional expression (6), the positive refractive power may become too large or too small, so that it may become difficult to correct aberrations.

[0113] Conditional expression (7) is a condition on the ratio of the focal length of the fourth lens to the total focal length of the optical imaging system, and when |f4 / f| is outside the range of conditional expression (7), appropriate refractive power may not be maintained, so that it may become difficult to correct aberrations. Some examples may satisfy 5<|f4 / f|<70.

[0114] Conditional expression (8) is a condition on the ratio of the focal length of the fifth lens to the total focal length of the optical imaging system, and when |f5 / f| is outside the range of conditional expression (8), the negative refractive power may become too large, so that it may become difficult to correct aberrations. Some examples may satisfy 5<|f5 / f|<50.

[0115] Conditional Expression (9) is a condition regarding the ratio of the focal length of the sixth lens to the total focal length of the optical imaging system, and when f6 / f is out of the range of Conditional Expression (9), desired refractive power may not be maintained.

[0116] Conditional Expression (10) is a condition regarding the ratio of the focal length of the seventh lens to the total focal length of the optical imaging system, and when f7 / f is out of the range of Conditional Expression (10), desired refractive power may not be maintained.

[0117] Conditional expression (11) is a condition regarding the ratio of the total length of the optical imaging system to the total focal length, and when OAL / f exceeds the upper limit of conditional expression (11), it may be difficult to achieve miniaturization of the optical imaging system.

[0118] Conditional expressions (12) and (13) are conditions regarding the ratio of the focal length of the first lens to the focal length of the second lens and the ratio of the focal length of the first lens to the focal length of the third lens, respectively. When f1 / f2 exceeds the upper limit of conditional expression (12) and f1 / f3 is less than the lower limit of conditional expression (13), any one of these lenses may be too large, so that the aberration characteristics may deteriorate, and it may become difficult to ensure performance.

[0119] Conditional expression (14) is a condition regarding the ratio of BFL to the total focal length, and when BFL / f exceeds the upper limit of conditional expression (14), it may become difficult to achieve miniaturization of the optical imaging system.

[0120] Conditional Expression (15) is a condition regarding the ratio of the distance between the first lens and the second lens to the total focal length, and when D1 / f exceeds the upper limit of Conditional Expression (15), the longitudinal chromatic aberration characteristic may deteriorate.

[0121] The optical imaging system satisfying the above conditional expression can be easily miniaturized and can be installed in a small terminal. In addition, the optical imaging system satisfying the above conditional expression can achieve high resolution.

[0122] The following will refer to Figure 1A and Figure 1B An optical imaging system 100 according to a first example is described.

[0123] Figure 1A is a cross-sectional view showing an optical imaging system 100 according to a first example. Figure 1B Graph showing aberration characteristics of the optical imaging system 100 .

[0124] 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, a sixth lens 160, a seventh lens 170, and an image sensor 190, which are sequentially arranged from the object side toward the image side. The optical imaging system 100 may include an IR filter 180 disposed between the seventh lens 170 and the image sensor 190.

[0125] 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. The image side surface of the first lens 110 may be concave in the paraxial region. The object side surface of the first lens 110 may be aspherical. The image side surface of the first lens 110 may be aspherical.

[0126] The second lens 120 may have negative refractive power. The object side surface of the second lens 120 may be convex in the paraxial region. The image side surface of the second lens 120 may be concave in the paraxial region. The object side surface of the second lens 120 may be aspherical. The image side surface of the second lens 120 may be aspherical.

[0127] The third lens 130 may have positive refractive power. The object side surface of the third lens 130 may be convex in the paraxial region. The image side surface of the third lens 130 may be convex in the paraxial region. The object side surface of the third lens 130 may be aspherical. The image side surface of the third lens 130 may be aspherical.

[0128] The fourth lens 140 may have negative refractive power. The object-side surface of the fourth lens 140 may be concave in the paraxial region. The image-side surface of the fourth lens 140 may be concave in the paraxial region. The object-side surface of the fourth lens 140 may be aspherical. The image-side surface of the fourth lens 140 may be aspherical.

[0129] The fifth lens 150 may have negative refractive power. The object-side surface of the fifth lens 150 may be convex in the paraxial region. The image-side surface of the fifth lens 150 may be concave in the paraxial region. The object-side surface of the fifth lens 150 may be aspherical. The image-side surface of the fifth lens 150 may be aspherical.

[0130] The sixth lens 160 may have positive refractive power. The object-side surface of the sixth lens 160 may be convex in the paraxial region. The image-side surface of the sixth lens 160 may be convex in the paraxial region. The object-side surface of the sixth lens 160 may be aspherical. The image-side surface of the sixth lens 160 may be aspherical.

[0131] The seventh lens 170 may have negative refractive power. The object-side surface of the seventh lens 170 may be convex in the paraxial region. The image-side surface of the seventh lens 170 may be concave in the paraxial region. The object-side surface of the seventh lens 170 may be aspherical. The image-side surface of the seventh lens 170 may be aspherical.

[0132] The object-side surface of the first lens 110 may include an inflection point. The image-side surface of the first lens 110 may include an inflection point. The image-side surface of the first lens 110 may be concave in a paraxial region and may be convex in an off-axis region.

[0133] The image-side surface of the fourth lens 140 may include an inflection point. The image-side surface of the fourth lens 140 may be concave in a paraxial region and may be convex in an off-axis region.

[0134] The object side surface of the fifth lens 150 may include an inflection point. The object side surface of the fifth lens 150 may be convex in the paraxial region and may be concave in the off-axis region. The image side surface of the fifth lens 150 may include an inflection point. The image side surface of the fifth lens 150 may be concave in the paraxial region and may be convex in the off-axis region.

[0135] The object side surface of the sixth lens 160 may include an inflection point. The object side surface of the sixth lens 160 may be convex in the paraxial region and may be concave in the off-axis region.

[0136] The object side surface of the seventh lens 170 may include an inflection point. The object side surface of the seventh lens 170 may be convex in the paraxial region and may be concave in the off-axis region. The image side surface of the seventh lens 170 may include an inflection point. The image side surface of the seventh lens 170 may be concave in the paraxial region and may be convex in the off-axis region.

[0137] At least one of the first lens 110 to the seventh lens 170 may be formed of glass. For example, the first lens 110 may be a glass lens. Materials with a high Abbe number may be used to reduce the chromatic aberration of the optical imaging system. Since the Abbe number of glass is relatively greater than that of plastic, glass lenses may be advantageous in ensuring high resolution. For example, the first lens 110 may be formed of glass so that the conditional expression (2) (“30 < v1 - v2 < 70” or “40 < v1 - v2 < 70”) can be relatively easily satisfied.

[0138] In the optical imaging system 100, f1 / f may be 1.111, v1 - v2 may be 52.44, v1 - v3 may be 15.94, v1 - v4 may be 52.44, f2 / f may be -4.514, f3 / f may be 3.444, |f4 / f| may be 3.882, |f5 / f| may be 6.599, f6 / f may be 0.996, f7 / f may be -0.767, OAL / f may be 1.198, f1 / f2 may be -0.246, f1 / f3 may be 0.323, BFL / f may be 0.183, D1 / f may be 0.033, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 103.141, SAG42 / OAL may be -0.054, SAG52 / OAL may be -0.1, SAG62 / OAL may be -0.158, and SAG72 / OAL may be -0.191.

[0139] Table 1 shows the optical parameters and physical parameters of the optical imaging system 100. Table 2 shows the aspherical data of the optical imaging system 100.

[0140] Table 1

[0141] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 2.00 0.704 1.553 71.7 3 5.98 0.153 4 11.53 0.210 1.671 19.2 5 6.29 0.158 6 11.33 0.370 1.535 55.7 7 -33.50 0.316 8 -28.98 0.210 1.671 19.2 9 20.82 0.252 10 4.69 0.218 1.614 25.9 11 3.69 0.319 12 6.23 0.456 1.567 37.4 13 -4.36 0.849 14 19.68 0.446 1.535 55.7 15 1.71 0.200 16 0.110 1.517 64.2 17 0.509 Imaging surface 0.020

[0142] Table 2

[0143]

[0144]

[0145] The following will refer to Figure 2A and Figure 2B An optical imaging system 200 according to a second example is described.

[0146] Figure 2A is a cross-sectional view showing an optical imaging system 200 according to the second example. Figure 2B Graph showing aberration characteristics of the optical imaging system 200 .

[0147] 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, a seventh lens 270, and an image sensor 290, which are sequentially arranged from the object side toward the image side. The optical imaging system 200 may include an IR filter 280 disposed between the seventh lens 270 and the image sensor 290.

[0148] The first lens 210 may have positive refractive power. The object side surface of the first lens 210 may be convex in the paraxial region. The image side surface of the first lens 210 may be concave in the paraxial region. The object side surface of the first lens 210 may be aspherical. The image side surface of the first lens 210 may be aspherical.

[0149] The second lens 220 may have negative refractive power. The object side surface of the second lens 220 may be convex in the paraxial region. The image side surface of the second lens 220 may be concave in the paraxial region. The object side surface of the second lens 220 may be aspherical. The image side surface of the second lens 220 may be aspherical.

[0150] The third lens 230 may have positive refractive power. The object side surface of the third lens 230 may be convex in the paraxial region. The image side surface of the third lens 230 may be convex in the paraxial region. The object side surface of the third lens 230 may be aspherical. The image side surface of the third lens 230 may be aspherical.

[0151] The fourth lens 240 may have negative refractive power. The object-side surface of the fourth lens 240 may be concave in the paraxial region. The image-side surface of the fourth lens 240 may be concave in the paraxial region. The object-side surface of the fourth lens 240 may be aspherical. The image-side surface of the fourth lens 240 may be aspherical.

[0152] The fifth lens 250 may have negative refractive power. The object-side surface of the fifth lens 250 may be convex in the paraxial region. The image-side surface of the fifth lens 250 may be concave in the paraxial region. The object-side surface of the fifth lens 250 may be aspherical. The image-side surface of the fifth lens 250 may be aspherical.

[0153] 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. The image-side surface of the sixth lens 260 may be convex in the paraxial region. The object-side surface of the sixth lens 260 may be aspherical. The image-side surface of the sixth lens 260 may be aspherical.

[0154] The seventh lens 270 may have negative refractive power. The object-side surface of the seventh lens 270 may be convex in the paraxial region. The image-side surface of the seventh lens 270 may be concave in the paraxial region. The object-side surface of the seventh lens 270 may be aspherical. The image-side surface of the seventh lens 270 may be aspherical.

[0155] The object-side surface of the first lens 210 may include an inflection point. The image-side surface of the first lens 210 may include an inflection point. The image-side surface of the first lens 210 may be concave in a paraxial region and may be convex in an off-axis region.

[0156] The image-side surface of the fourth lens 240 may include an inflection point.The image-side surface of the fourth lens 240 may be concave in a paraxial region and may be convex in an off-axis region.

[0157] The object-side surface of the fifth lens 250 may include an inflection point. The object-side surface of the fifth lens 250 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 250 may include an inflection point. The image-side surface of the fifth lens 250 may be concave in the paraxial region and may be convex in the off-axis region.

[0158] The object-side surface of the sixth lens 260 may include an inflection point. The object-side surface of the sixth lens 260 may be convex in a paraxial region and may be concave in an off-axis region.

[0159] The object-side surface of the seventh lens 270 may include an inflection point. The object-side surface of the seventh lens 270 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 270 may include an inflection point. The image-side surface of the seventh lens 270 may be concave in the paraxial region and may be convex in the off-axis region.

[0160] At least one of the first to seventh lenses 210 to 270 may be formed of glass. For example, the first lens 210 may be a glass lens.

[0161] In the optical imaging system 200, f1 / f may be 1.085, v1-v2 may be 47.78, v1-v3 may be 11.28, v1-v4 may be 47.78, f2 / f may be -3.888, f3 / f may be 3.144, |f4 / f| may be 4.319, |f5 / f| may be 7.394, f6 / f may be 1.09, f7 / f may be -0.761, OAL / f may be 1.204, f1 / f2 may be -0.279, f1 / f3 may be 0.345, BFL / f may be 0.169, D1 / f may be 0.034, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 103.816, SAG42 / OAL may be -0.054, SAG52 / OAL may be -0.096, SAG62 / OAL may be -0.157, and SAG72 / OAL may be -0.199.

[0162] Table 3 shows optical and physical parameters of the optical imaging system 200. Table 4 shows aspherical surface data of the optical imaging system 200.

[0163] Table 3

[0164]

[0165]

[0166] Table 4

[0167]

[0168]

[0169] The following will refer to Figure 3A and Figure 3B An optical imaging system 300 according to a third example is described.

[0170] Figure 3A is a cross-sectional view showing an optical imaging system 300 according to a third example. Figure 3B3 is a graph showing the aberration characteristics of the optical imaging system 300 .

[0171] 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, a seventh lens 370, and an image sensor 390 arranged sequentially from the object side toward the image side. The optical imaging system 300 may include an IR filter 380 disposed between the seventh lens 370 and the image sensor 390.

[0172] The first lens 310 may have positive refractive power. The object side surface of the first lens 310 may be convex in the paraxial region. The image side surface of the first lens 310 may be concave in the paraxial region. The object side surface of the first lens 310 may be aspherical. The image side surface of the first lens 310 may be aspherical.

[0173] The second lens 320 may have negative refractive power. The object side surface of the second lens 320 may be convex in the paraxial region. The image side surface of the second lens 320 may be concave in the paraxial region. The object side surface of the second lens 320 may be aspherical. The image side surface of the second lens 320 may be aspherical.

[0174] The third lens 330 may have positive refractive power. The object side surface of the third lens 330 may be convex in the paraxial region. The image side surface of the third lens 330 may be concave in the paraxial region. The object side surface of the third lens 330 may be aspherical. The image side surface of the third lens 330 may be aspherical.

[0175] The fourth lens 340 may have negative refractive power. The object-side surface of the fourth lens 340 may be convex in the paraxial region. The image-side surface of the fourth lens 340 may be concave in the paraxial region. The object-side surface of the fourth lens 340 may be aspherical. The image-side surface of the fourth lens 340 may be aspherical.

[0176] The fifth lens 350 may have negative refractive power. The object-side surface of the fifth lens 350 may be convex in the paraxial region. The image-side surface of the fifth lens 350 may be concave in the paraxial region. The object-side surface of the fifth lens 350 may be aspherical. The image-side surface of the fifth lens 350 may be aspherical.

[0177] The sixth lens 360 may have positive refractive power. The object side surface of the sixth lens 360 may be convex in the paraxial region. The image side surface of the sixth lens 360 may be convex in the paraxial region. The object side surface of the sixth lens 360 may be aspherical. The image side surface of the sixth lens 360 may be aspherical.

[0178] The seventh lens 370 may have negative refractive power. The object-side surface of the seventh lens 370 may be convex in the paraxial region. The image-side surface of the seventh lens 370 may be concave in the paraxial region. The object-side surface of the seventh lens 370 may be aspherical. The image-side surface of the seventh lens 370 may be aspherical.

[0179] The object-side surface of the first lens 310 may include an inflection point. The image-side surface of the first lens 310 may include an inflection point. The image-side surface of the first lens 310 may be concave in a paraxial region and may be convex in an off-axis region.

[0180] The object-side surface of the fourth lens 340 may include an inflection point. The object-side surface of the fourth lens 340 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fourth lens 340 may include an inflection point. The image-side surface of the fourth lens 340 may be concave in the paraxial region and may be convex in the off-axis region.

[0181] The object-side surface of the fifth lens 350 may include an inflection point. The object-side surface of the fifth lens 350 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 350 may include an inflection point. The image-side surface of the fifth lens 350 may be concave in the paraxial region and may be convex in the off-axis region.

[0182] The object-side surface of the sixth lens 360 may include an inflection point. The object-side surface of the sixth lens 360 may be convex in a paraxial region and may be concave in an off-axis region.

[0183] The object-side surface of the seventh lens 370 may include an inflection point. The object-side surface of the seventh lens 370 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 370 may include an inflection point. The image-side surface of the seventh lens 370 may be concave in the paraxial region and may be convex in the off-axis region.

[0184] At least one of the first to seventh lenses 310 to 370 may be formed of glass. For example, the first lens 310 may be a glass lens.

[0185] In the optical imaging system 300, f1 / f may be 1.167, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -4.816, f3 / f may be 3.486, |f4 / f| may be 6.801, |f5 / f| may be 6.973, f6 / f may be 1.121, f7 / f may be -0.77, OAL / f may be 1.163, f1 / f2 may be -0.242, f1 / f3 may be 0.335, BFL / f may be 0.175, D1 / f may be 0.038, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 98.145, SAG42 / OAL may be -0.053, SAG52 / OAL may be -0.102, SAG62 / OAL may be -0.126, and SAG72 / OAL may be -0.161.

[0186] Table 5 shows optical and physical parameters of the optical imaging system 300. Table 6 shows aspheric surface data of the optical imaging system 300.

[0187] Table 5

[0188]

[0189]

[0190] Table 6

[0191]

[0192]

[0193] The following will refer to Figure 4A and Figure 4B An optical imaging system 400 according to a fourth example is described.

[0194] Figure 4A is a cross-sectional view showing an optical imaging system 400 according to a fourth example. Figure 4B 4 is a graph showing the aberration characteristics of the optical imaging system 400 .

[0195] 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, a sixth lens 460, a seventh lens 470, and an image sensor 490, which are sequentially arranged from the object side toward the image side. The optical imaging system 400 may include an IR filter 480 disposed between the seventh lens 470 and the image sensor 490.

[0196] The first lens 410 may have positive refractive power. The object side surface of the first lens 410 may be convex in the paraxial region. The image side surface of the first lens 410 may be concave in the paraxial region. The object side surface of the first lens 410 may be aspherical. The image side surface of the first lens 410 may be aspherical.

[0197] 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. The image side surface of the second lens 420 may be concave in the paraxial region. The object side surface of the second lens 420 may be an aspherical surface. The image side surface of the second lens 420 may be an aspherical surface.

[0198] The third lens 430 may have positive refractive power. The object side surface of the third lens 430 may be convex in the paraxial region. The image side surface of the third lens 430 may be convex in the paraxial region. The object side surface of the third lens 430 may be aspherical. The image side surface of the third lens 430 may be aspherical.

[0199] The fourth lens 440 may have negative refractive power. The object-side surface of the fourth lens 440 may be concave in the paraxial region. The image-side surface of the fourth lens 440 may be concave in the paraxial region. The object-side surface of the fourth lens 440 may be aspherical. The image-side surface of the fourth lens 440 may be aspherical.

[0200] The fifth lens 450 may have negative refractive power. The object-side surface of the fifth lens 450 may be convex in the paraxial region. The image-side surface of the fifth lens 450 may be concave in the paraxial region. The object-side surface of the fifth lens 450 may be aspherical. The image-side surface of the fifth lens 450 may be aspherical.

[0201] The sixth lens 460 may have positive refractive power. The object side surface of the sixth lens 460 may be convex in the paraxial region. The image side surface of the sixth lens 460 may be concave in the paraxial region. The object side surface of the sixth lens 460 may be aspherical. The image side surface of the sixth lens 460 may be aspherical.

[0202] The seventh lens 470 may have negative refractive power. The object-side surface of the seventh lens 470 may be convex in the paraxial region. The image-side surface of the seventh lens 470 may be concave in the paraxial region. The object-side surface of the seventh lens 470 may be aspherical. The image-side surface of the seventh lens 470 may be aspherical.

[0203] The object-side surface of the third lens 430 may include an inflection point. The object-side surface of the third lens 430 may be convex in a paraxial region and may be concave in an off-axis region.

[0204] The image-side surface of the fourth lens 440 may include an inflection point.The image-side surface of the fourth lens 440 may be concave in a paraxial region and may be convex in an off-axis region.

[0205] The object-side surface of the fifth lens 450 may include an inflection point. The object-side surface of the fifth lens 450 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 450 may include an inflection point. The image-side surface of the fifth lens 450 may be concave in the paraxial region and may be convex in the off-axis region.

[0206] The object-side surface of the sixth lens 460 may include an inflection point. The object-side surface of the sixth lens 460 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the sixth lens 460 may include an inflection point. The image-side surface of the sixth lens 460 may be concave in the paraxial region and may be convex in the off-axis region.

[0207] The object-side surface of the seventh lens 470 may include an inflection point. The object-side surface of the seventh lens 470 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 470 may include an inflection point. The image-side surface of the seventh lens 470 may be concave in the paraxial region and may be convex in the off-axis region.

[0208] At least one of the first to seventh lenses 410 to 470 may be formed of glass. For example, the first lens 410 may be a glass lens.

[0209] In the optical imaging system 400, f1 / f may be 1.113, v1-v2 may be 62.32, v1-v3 may be 25.57, v1-v4 may be 62.32, f2 / f may be -7.017, f3 / f may be 4.201, |f4 / f| may be 4.848, |f5 / f| may be 3.313, f6 / f may be 1.171, f7 / f may be -0.82, OAL / f may be 1.178, f1 / f2 may be -0.159, f1 / f3 may be 0.265, BFL / f may be 0.135, D1 / f may be 0.027, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 101.156, SAG42 / OAL may be -0.055, SAG52 / OAL may be -0.083, SAG62 / OAL may be -0.159, and SAG72 / OAL may be -0.18.

[0210] Table 7 shows optical and physical parameters of the optical imaging system 400. Table 8 shows aspheric surface data of the optical imaging system 400.

[0211] Table 7

[0212] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 1.82 0.723 1.497 81.6 3 5.32 0.126 4 7.74 0.200 1.671 19.2 5 5.68 0.209 6 25.97 0.310 1.544 56.0 7 -18.18 0.302 8 -18.38 0.200 1.671 19.2 9 94.05 0.256 10 32.30 0.208 1.614 25.9 11 7.38 0.281 12 2.79 0.537 1.567 37.4 13 24.34 1.169 14 7.22 0.350 1.535 55.7 15 1.58 0.200 16 0.210 1.517 64.2 17 0.237 Imaging surface -0.018

[0213] Table 8

[0214]

[0215]

[0216]

[0217] The following will refer to Figure 5A and Figure 5B An optical imaging system 500 according to a fifth example is described.

[0218] Figure 5A is a cross-sectional view showing an optical imaging system 500 according to a fifth example. Figure 5B Graph showing aberration characteristics of the optical imaging system 500 .

[0219] 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, a sixth lens 560, a seventh lens 570, and an image sensor 590, which are sequentially arranged from the object side toward the image side. The optical imaging system 500 may include an IR filter 580 disposed between the seventh lens 570 and the image sensor 590.

[0220] The first lens 510 may have positive refractive power. The object side surface of the first lens 510 may be convex in the paraxial region. The image side surface of the first lens 510 may be concave in the paraxial region. The object side surface of the first lens 510 may be aspherical. The image side surface of the first lens 510 may be aspherical.

[0221] The second lens 520 may have negative refractive power. The object side surface of the second lens 520 may be convex in the paraxial region. The image side surface of the second lens 520 may be concave in the paraxial region. The object side surface of the second lens 520 may be aspherical. The image side surface of the second lens 520 may be aspherical.

[0222] The third lens 530 may have positive refractive power. The object side surface of the third lens 530 may be convex in the paraxial region. The image side surface of the third lens 530 may be concave in the paraxial region. The object side surface of the third lens 530 may be aspherical. The image side surface of the third lens 530 may be aspherical.

[0223] The fourth lens 540 may have negative refractive power. The object-side surface of the fourth lens 540 may be concave in the paraxial region. The image-side surface of the fourth lens 540 may be concave in the paraxial region. The object-side surface of the fourth lens 540 may be aspherical. The image-side surface of the fourth lens 540 may be aspherical.

[0224] The fifth lens 550 may have positive refractive power. The object-side surface of the fifth lens 550 may be convex in the paraxial region. The image-side surface of the fifth lens 550 may be concave in the paraxial region. The object-side surface of the fifth lens 550 may be aspherical. The image-side surface of the fifth lens 550 may be aspherical.

[0225] The sixth lens 560 may have positive refractive power. The object side surface of the sixth lens 560 may be convex in the paraxial region. The image side surface of the sixth lens 560 may be convex in the paraxial region. The object side surface of the sixth lens 560 may be aspherical. The image side surface of the sixth lens 560 may be aspherical.

[0226] The seventh lens 570 may have negative refractive power. The object-side surface of the seventh lens 570 may be convex in the paraxial region. The image-side surface of the seventh lens 570 may be concave in the paraxial region. The object-side surface of the seventh lens 570 may be aspherical. The image-side surface of the seventh lens 570 may be aspherical.

[0227] The object-side surface of the first lens 510 may include an inflection point. The image-side surface of the first lens 510 may include an inflection point. The image-side surface of the first lens 510 may be concave in a paraxial region and may be convex in an off-axis region.

[0228] The image-side surface of the fourth lens 540 may include an inflection point.The image-side surface of the fourth lens 540 may be concave in a paraxial region and may be convex in an off-axis region.

[0229] The object-side surface of the fifth lens 550 may include an inflection point. The object-side surface of the fifth lens 550 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 550 may include an inflection point. The image-side surface of the fifth lens 550 may be concave in the paraxial region and may be convex in the off-axis region.

[0230] The object-side surface of the sixth lens 560 may include an inflection point. The object-side surface of the sixth lens 560 may be convex in a paraxial region and may be concave in an off-axis region.

[0231] The object-side surface of the seventh lens 570 may include an inflection point. The object-side surface of the seventh lens 570 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 570 may include an inflection point. The image-side surface of the seventh lens 570 may be concave in the paraxial region and may be convex in the off-axis region.

[0232] At least one of the first to seventh lenses 510 to 570 may be formed of glass. For example, the first lens 510 may be a glass lens.

[0233] In the optical imaging system 500, f1 / f may be 1.153, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -4.618, f3 / f may be 3.413, |f4 / f| may be 3.306, |f5 / f| may be 33.43, f6 / f may be 1.115, f7 / f may be -0.711, OAL / f may be 1.153, f1 / f2 may be -0.25, f1 / f3 may be 0.338, BFL / f may be 0.173, D1 / f may be 0.035, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 96.787, SAG42 / OAL may be -0.058, SAG52 / OAL may be -0.088, SAG62 / OAL may be -0.124, and SAG72 / OAL may be -0.165.

[0234] Table 9 shows optical and physical parameters of the optical imaging system 500. Table 10 shows aspheric surface data of the optical imaging system 500.

[0235] Table 9

[0236] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 1.87 0.776 1.497 81.6 3 5.04 0.168 4 6.44 0.220 1.680 18.2 5 4.46 0.107 6 6.49 0.311 1.535 55.7 7 24.75 0.356 8 -23.88 0.220 1.680 18.2 9 20.01 0.235 10 3.51 0.231 1.614 25.9 11 3.55 0.376 12 6.36 0.353 1.567 37.4 13 -5.70 0.966 14 20.24 0.355 1.535 55.7 15 1.66 0.200 16 0.110 1.517 64.2 17 0.497 Imaging surface 0.020

[0237] Table 10

[0238]

[0239]

[0240] The following will refer to Fig. 6A and Figure 6B An optical imaging system 600 according to a sixth example is described.

[0241] Fig. 6A is a cross-sectional view showing an optical imaging system 600 according to a sixth example. Figure 6B Graph showing aberration characteristics of the optical imaging system 600 .

[0242] 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, a sixth lens 660, a seventh lens 670, and an image sensor 690, which are sequentially arranged from the object side toward the image side. The optical imaging system 600 may include an IR filter 680 disposed between the seventh lens 670 and the image sensor 690.

[0243] 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. The image side surface of the first lens 610 may be concave in the paraxial region. The object side surface of the first lens 610 may be aspherical. The image side surface of the first lens 610 may be aspherical.

[0244] The second lens 620 may have negative refractive power. The object side surface of the second lens 620 may be convex in the paraxial region. The image side surface of the second lens 620 may be concave in the paraxial region. The object side surface of the second lens 620 may be aspherical. The image side surface of the second lens 620 may be aspherical.

[0245] The third lens 630 may have positive refractive power. The object side surface of the third lens 630 may be convex in the paraxial region. The image side surface of the third lens 630 may be concave in the paraxial region. The object side surface of the third lens 630 may be aspherical. The image side surface of the third lens 630 may be aspherical.

[0246] The fourth lens 640 may have negative refractive power. The object-side surface of the fourth lens 640 may be concave in the paraxial region. The image-side surface of the fourth lens 640 may be concave in the paraxial region. The object-side surface of the fourth lens 640 may be aspherical. The image-side surface of the fourth lens 640 may be aspherical.

[0247] The fifth lens 650 may have negative refractive power. The object-side surface of the fifth lens 650 may be convex in the paraxial region. The image-side surface of the fifth lens 650 may be concave in the paraxial region. The object-side surface of the fifth lens 650 may be aspherical. The image-side surface of the fifth lens 650 may be aspherical.

[0248] The sixth lens 660 may have positive refractive power. The object side surface of the sixth lens 660 may be convex in the paraxial region. The image side surface of the sixth lens 660 may be convex in the paraxial region. The object side surface of the sixth lens 660 may be aspherical. The image side surface of the sixth lens 660 may be aspherical.

[0249] The seventh lens 670 may have negative refractive power. The object side surface of the seventh lens 670 may be convex in the paraxial region. The image side surface of the seventh lens 670 may be concave in the paraxial region. The object side surface of the seventh lens 670 may be aspherical. The image side surface of the seventh lens 670 may be aspherical.

[0250] The object-side surface of the first lens 610 may include an inflection point. The image-side surface of the first lens 610 may include an inflection point. The image-side surface of the first lens 610 may be concave in a paraxial region and may be convex in an off-axis region.

[0251] The image-side surface of the fourth lens 640 may include an inflection point.The image-side surface of the fourth lens 640 may be concave in a paraxial region and may be convex in an off-axis region.

[0252] The object-side surface of the fifth lens 650 may include an inflection point. The object-side surface of the fifth lens 650 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 650 may include an inflection point. The image-side surface of the fifth lens 650 may be concave in the paraxial region and may be convex in the off-axis region.

[0253] The object-side surface of the sixth lens 660 may include an inflection point. The object-side surface of the sixth lens 660 may be convex in a paraxial region and may be concave in an off-axis region.

[0254] The object-side surface of the seventh lens 670 may include an inflection point. The object-side surface of the seventh lens 670 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 670 may include an inflection point. The image-side surface of the seventh lens 670 may be concave in the paraxial region and may be convex in the off-axis region.

[0255] At least one of the first to seventh lenses 610 to 670 may be formed of glass. For example, the first lens 610 may be a glass lens.

[0256] In the optical imaging system 600, f1 / f may be 1.149, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -4.019, f3 / f may be 3.116, |f4 / f| may be 5.644, |f5 / f| may be 9.305, f6 / f may be 1.171, f7 / f may be -0.762, OAL / f may be 1.158, f1 / f2 may be -0.286, f1 / f3 may be 0.369, BFL / f may be 0.171, D1 / f may be 0.034, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 97.409, SAG42 / OAL may be -0.048, SAG52 / OAL may be -0.089, SAG62 / OAL may be -0.146, and SAG72 / OAL may be -0.201.

[0257] Table 11 shows optical and physical parameters of the optical imaging system 600. Table 12 shows aspheric surface data of the optical imaging system 600.

[0258] Table 11

[0259] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 1.88 0.735 1.497 81.6 3 5.26 0.164 4 7.05 0.200 1.680 18.2 5 4.54 0.104 6 5.06 0.282 1.535 55.7 7 13.61 0.397 8 -76.43 0.200 1.680 18.2 9 24.39 0.276 10 4.04 0.240 1.614 25.9 11 3.44 0.323 12 6.25 0.409 1.567 37.4 13 -6.30 0.897 14 20.55 0.460 1.535 55.7 15 1.76 0.200 16 0.110 1.517 64.2 17 0.484 Imaging surface 0.020

[0260] Table 12

[0261]

[0262]

[0263]

[0264] The following will refer to Fig. 7A and Figure 7B An optical imaging system 700 according to a seventh example is described.

[0265] Fig. 7A is a cross-sectional view showing an optical imaging system 700 according to a seventh example. Figure 7B 700 is a graph showing the aberration characteristics of the optical imaging system 700 .

[0266] 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, a seventh lens 770, and an image sensor 790 arranged sequentially from the object side toward the image side. The optical imaging system 700 may include an IR filter 780 disposed between the seventh lens 770 and the image sensor 790.

[0267] 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. The image side surface of the first lens 710 may be concave in the paraxial region. The object side surface of the first lens 710 may be aspherical. The image side surface of the first lens 710 may be aspherical.

[0268] The second lens 720 may have negative refractive power. The object side surface of the second lens 720 may be convex in the paraxial region. The image side surface of the second lens 720 may be concave in the paraxial region. The object side surface of the second lens 720 may be aspherical. The image side surface of the second lens 720 may be aspherical.

[0269] The third lens 730 may have positive refractive power. The object side surface of the third lens 730 may be convex in the paraxial region. The image side surface of the third lens 730 may be concave in the paraxial region. The object side surface of the third lens 730 may be aspherical. The image side surface of the third lens 730 may be aspherical.

[0270] The fourth lens 740 may have negative refractive power. The object-side surface of the fourth lens 740 may be concave in the paraxial region. The image-side surface of the fourth lens 740 may be concave in the paraxial region. The object-side surface of the fourth lens 740 may be aspherical. The image-side surface of the fourth lens 740 may be aspherical.

[0271] The fifth lens 750 may have negative refractive power. The object-side surface of the fifth lens 750 may be convex in the paraxial region. The image-side surface of the fifth lens 750 may be concave in the paraxial region. The object-side surface of the fifth lens 750 may be aspherical. The image-side surface of the fifth lens 750 may be aspherical.

[0272] The sixth lens 760 may have positive refractive power. The object side surface of the sixth lens 760 may be convex in the paraxial region. The image side surface of the sixth lens 760 may be convex in the paraxial region. The object side surface of the sixth lens 760 may be aspherical. The image side surface of the sixth lens 760 may be aspherical.

[0273] The seventh lens 770 may have negative refractive power. The object-side surface of the seventh lens 770 may be convex in the paraxial region. The image-side surface of the seventh lens 770 may be concave in the paraxial region. The object-side surface of the seventh lens 770 may be aspherical. The image-side surface of the seventh lens 770 may be aspherical.

[0274] The object-side surface of the first lens 710 may include an inflection point. The image-side surface of the first lens 710 may include an inflection point. The image-side surface of the first lens 710 may be concave in a paraxial region and may be convex in an off-axis region.

[0275] The image-side surface of the fourth lens 740 may include an inflection point.The image-side surface of the fourth lens 740 may be concave in a paraxial region and may be convex in an off-axis region.

[0276] The object-side surface of the fifth lens 750 may include an inflection point. The object-side surface of the fifth lens 750 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 750 may include an inflection point. The image-side surface of the fifth lens 750 may be concave in the paraxial region and may be convex in the off-axis region.

[0277] The object-side surface of the sixth lens 760 may include an inflection point. The object-side surface of the sixth lens 760 may be convex in a paraxial region and may be concave in an off-axis region.

[0278] The object-side surface of the seventh lens 770 may include an inflection point. The object-side surface of the seventh lens 770 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 770 may include an inflection point. The image-side surface of the seventh lens 770 may be concave in the paraxial region and may be convex in the off-axis region.

[0279] At least one of the first to seventh lenses 710 to 770 may be formed of glass. For example, the first lens 710 may be a glass lens.

[0280] In the optical imaging system 700, f1 / f may be 1.122, v1-v2 may be 63.41, v1-v3 may be 44.16, v1-v4 may be 63.41, f2 / f may be -3.476, f3 / f may be 2.811, |f4 / f| may be 5.518, |f5 / f| may be 9.138, f6 / f may be 1.21, f7 / f may be -0.759, OAL / f may be 1.153, f1 / f2 may be -0.323, f1 / f3 may be 0.399, BFL / f may be 0.17, D1 / f may be 0.033, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 96.68, SAG42 / OAL may be -0.046, SAG52 / OAL may be -0.092, SAG62 / OAL may be -0.149, and SAG72 / OAL may be -0.203.

[0281] Table 13 shows optical and physical parameters of the optical imaging system 700. Table 14 shows aspheric surface data of the optical imaging system 700.

[0282] Table 13

[0283] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 1.87 0.748 1.497 81.6 3 5.39 0.159 4 7.43 0.200 1.680 18.2 5 4.45 0.101 6 5.07 0.290 1.567 37.4 7 14.67 0.411 8 -255.60 0.200 1.680 18.2 9 19.53 0.278 10 4.13 0.245 1.614 25.9 11 3.50 0.318 12 6.24 0.392 1.567 37.4 13 -6.81 0.865 14 19.84 0.483 1.535 55.7 15 1.76 0.200 16 0.110 1.517 64.2 17 0.479 Imaging surface 0.020

[0284] Table 14

[0285]

[0286]

[0287]

[0288] The following will refer to Fig. 8A and Figure 8B An optical imaging system 800 according to an eighth example is described.

[0289] Fig. 8A is a cross-sectional view showing an optical imaging system 800 according to an eighth example. Figure 8B Graph showing aberration characteristics of the optical imaging system 800 .

[0290] 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, a sixth lens 860, a seventh lens 870, and an image sensor 890, which are sequentially arranged from the object side toward the image side. The optical imaging system 800 may include an IR filter 880 disposed between the seventh lens 870 and the image sensor 890.

[0291] 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. The image side surface of the first lens 810 may be concave in the paraxial region. The object side surface of the first lens 810 may be aspherical. The image side surface of the first lens 810 may be aspherical.

[0292] The second lens 820 may have negative refractive power. The object side surface of the second lens 820 may be convex in the paraxial region. The image side surface of the second lens 820 may be concave in the paraxial region. The object side surface of the second lens 820 may be aspherical. The image side surface of the second lens 820 may be aspherical.

[0293] The third lens 830 may have positive refractive power. The object side surface of the third lens 830 may be convex in the paraxial region. The image side surface of the third lens 830 may be concave in the paraxial region. The object side surface of the third lens 830 may be aspherical. The image side surface of the third lens 830 may be aspherical.

[0294] The fourth lens 840 may have negative refractive power. The object-side surface of the fourth lens 840 may be concave in the paraxial region. The image-side surface of the fourth lens 840 may be convex in the paraxial region. The object-side surface of the fourth lens 840 may be aspherical. The image-side surface of the fourth lens 840 may be aspherical.

[0295] The fifth lens 850 may have negative refractive power. The object-side surface of the fifth lens 850 may be convex in the paraxial region. The image-side surface of the fifth lens 850 may be concave in the paraxial region. The object-side surface of the fifth lens 850 may be aspherical. The image-side surface of the fifth lens 850 may be aspherical.

[0296] The sixth lens 860 may have positive refractive power. The object side surface of the sixth lens 860 may be convex in the paraxial region. The image side surface of the sixth lens 860 may be convex in the paraxial region. The object side surface of the sixth lens 860 may be aspherical. The image side surface of the sixth lens 860 may be aspherical.

[0297] The seventh lens 870 may have negative refractive power. The object side surface of the seventh lens 870 may be convex in the paraxial region. The image side surface of the seventh lens 870 may be concave in the paraxial region. The object side surface of the seventh lens 870 may be aspherical. The image side surface of the seventh lens 870 may be aspherical.

[0298] The object-side surface of the first lens 810 may include an inflection point. The image-side surface of the first lens 810 may include an inflection point. The image-side surface of the first lens 810 may be concave in a paraxial region and may be convex in an off-axis region.

[0299] The object-side surface of the fifth lens 850 may include an inflection point. The object-side surface of the fifth lens 850 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 850 may include an inflection point. The image-side surface of the fifth lens 850 may be concave in the paraxial region and may be convex in the off-axis region.

[0300] The object-side surface of the sixth lens 860 may include an inflection point. The object-side surface of the sixth lens 860 may be convex in a paraxial region and may be concave in an off-axis region.

[0301] The object-side surface of the seventh lens 870 may include an inflection point. The object-side surface of the seventh lens 870 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 870 may include an inflection point. The image-side surface of the seventh lens 870 may be concave in the paraxial region and may be convex in the off-axis region.

[0302] At least one of the first to seventh lenses 810 to 870 may be formed of glass. For example, the first lens 810 may be a glass lens.

[0303] In the optical imaging system 800, f1 / f may be 1.047, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -3.393, f3 / f may be 2.971, |f4 / f| may be 8.908, |f5 / f| may be 5.662, f6 / f may be 1.177, f7 / f may be -0.642, OAL / f may be 1.081, f1 / f2 may be -0.309, f1 / f3 may be 0.353, BFL / f may be 0.169, D1 / f may be 0.029, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 87.291, SAG42 / OAL may be -0.06, SAG52 / OAL may be -0.095, SAG62 / OAL may be -0.137, and SAG72 / OAL may be -0.205.

[0304] Table 15 shows optical and physical parameters of the optical imaging system 800. Table 16 shows aspheric surface data of the optical imaging system 800.

[0305] Table 15

[0306]

[0307]

[0308] Table 16

[0309]

[0310]

[0311] The following will refer to Fig.9A and Fig. 9B An optical imaging system 900 according to a ninth example is described.

[0312] Fig.9A is a cross-sectional view showing an optical imaging system 900 according to a ninth example. Fig. 9B Graph showing aberration characteristics of the optical imaging system 900 .

[0313] 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, a sixth lens 960, a seventh lens 970, and an image sensor 990, which are sequentially arranged from the object side toward the image side. The optical imaging system 900 may include an IR filter 980 disposed between the seventh lens 970 and the image sensor 990.

[0314] The first lens 910 may have positive refractive power. The object side surface of the first lens 910 may be convex in the paraxial region. The image side surface of the first lens 910 may be concave in the paraxial region. The object side surface of the first lens 910 may be aspherical. The image side surface of the first lens 910 may be aspherical.

[0315] The second lens 920 may have negative refractive power. The object side surface of the second lens 920 may be convex in the paraxial region. The image side surface of the second lens 920 may be concave in the paraxial region. The object side surface of the second lens 920 may be aspherical. The image side surface of the second lens 920 may be aspherical.

[0316] The third lens 930 may have positive refractive power. The object side surface of the third lens 930 may be convex in the paraxial region. The image side surface of the third lens 930 may be concave in the paraxial region. The object side surface of the third lens 930 may be aspherical. The image side surface of the third lens 930 may be aspherical.

[0317] The fourth lens 940 may have positive refractive power. The object side surface of the fourth lens 940 may be concave in the paraxial region. The image side surface of the fourth lens 940 may be convex in the paraxial region. The object side surface of the fourth lens 940 may be aspherical. The image side surface of the fourth lens 940 may be aspherical.

[0318] The fifth lens 950 may have negative refractive power. The object side surface of the fifth lens 950 may be convex in the paraxial region. The image side surface of the fifth lens 950 may be concave in the paraxial region. The object side surface of the fifth lens 950 may be aspherical. The image side surface of the fifth lens 950 may be aspherical.

[0319] The sixth lens 960 may have positive refractive power. The object side surface of the sixth lens 960 may be convex in the paraxial region. The image side surface of the sixth lens 960 may be convex in the paraxial region. The object side surface of the sixth lens 960 may be aspherical. The image side surface of the sixth lens 960 may be aspherical.

[0320] The seventh lens 970 may have negative refractive power. The object-side surface of the seventh lens 970 may be convex in the paraxial region. The image-side surface of the seventh lens 970 may be concave in the paraxial region. The object-side surface of the seventh lens 970 may be aspherical. The image-side surface of the seventh lens 970 may be aspherical.

[0321] The object-side surface of the first lens 910 may include an inflection point. The image-side surface of the first lens 910 may include an inflection point. The image-side surface of the first lens 910 may be concave in a paraxial region and may be convex in an off-axis region.

[0322] The object-side surface of the fifth lens 950 may include an inflection point. The object-side surface of the fifth lens 950 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 950 may include an inflection point. The image-side surface of the fifth lens 950 may be concave in the paraxial region and may be convex in the off-axis region.

[0323] The object-side surface of the sixth lens 960 may include an inflection point. The object-side surface of the sixth lens 960 may be convex in a paraxial region and may be concave in an off-axis region.

[0324] The object-side surface of the seventh lens 970 may include an inflection point. The object-side surface of the seventh lens 970 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 970 may include an inflection point. The image-side surface of the seventh lens 970 may be concave in the paraxial region and may be convex in the off-axis region.

[0325] At least one of the first to seventh lenses 910 to 970 may be formed of glass. For example, the first lens 910 may be a glass lens.

[0326] In the optical imaging system 900, f1 / f may be 1.186, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 44.16, f2 / f may be -3.981, f3 / f may be 3.307, |f4 / f| may be 10.799, |f5 / f| may be 2.855, f6 / f may be 1.199, f7 / f may be -0.782, OAL / f may be 1.188, f1 / f2 may be -0.298, f1 / f3 may be 0.359, BFL / f may be 0.159, D1 / f may be 0.033, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 101.478, SAG42 / OAL may be -0.061, SAG52 / OAL may be -0.086, SAG62 / OAL may be -0.112, and SAG72 / OAL may be -0.14.

[0327] Table 17 shows optical and physical parameters of the optical imaging system 900. Table 18 shows aspherical surface data of the optical imaging system 900.

[0328] Table 17

[0329]

[0330]

[0331] Table 18

[0332]

[0333]

[0334] The following will refer to Fig. 10A and Fig. 10B An optical imaging system 1000 according to a tenth example is described.

[0335] Fig. 10A is a cross-sectional view showing an optical imaging system 1000 according to a tenth example. Fig. 10B Graph showing aberration characteristics of the optical imaging system 1000 .

[0336] 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, a sixth lens 1060, a seventh lens 1070, and an image sensor 1090, which are sequentially arranged from the object side toward the image side. The optical imaging system 1000 may include an IR filter 1080 disposed between the seventh lens 1070 and the image sensor 1090.

[0337] The first lens 1010 may have positive refractive power. The object side surface of the first lens 1010 may be convex in the paraxial region. The image side surface of the first lens 1010 may be concave in the paraxial region. The object side surface of the first lens 1010 may be aspherical. The image side surface of the first lens 1010 may be aspherical.

[0338] The second lens 1020 may have negative refractive power. The object side surface of the second lens 1020 may be convex in the paraxial region. The image side surface of the second lens 1020 may be concave in the paraxial region. The object side surface of the second lens 1020 may be aspherical. The image side surface of the second lens 1020 may be aspherical.

[0339] The third lens 1030 may have positive refractive power. The object-side surface of the third lens 1030 may be convex in the paraxial region. The image-side surface of the third lens 1030 may be concave in the paraxial region. The object-side surface of the third lens 1030 may be aspherical. The image-side surface of the third lens 1030 may be aspherical.

[0340] The fourth lens 1040 may have negative refractive power. The object-side surface of the fourth lens 1040 may be concave in the paraxial region. The image-side surface of the fourth lens 1040 may be convex in the paraxial region. The object-side surface of the fourth lens 1040 may be aspherical. The image-side surface of the fourth lens 1040 may be aspherical.

[0341] The fifth lens 1050 may have negative refractive power. The object-side surface of the fifth lens 1050 may be convex in the paraxial region. The image-side surface of the fifth lens 1050 may be concave in the paraxial region. The object-side surface of the fifth lens 1050 may be aspherical. The image-side surface of the fifth lens 1050 may be aspherical.

[0342] The sixth lens 1060 may have positive refractive power. The object-side surface of the sixth lens 1060 may be convex in the paraxial region. The image-side surface of the sixth lens 1060 may be convex in the paraxial region. The object-side surface of the sixth lens 1060 may be aspherical. The image-side surface of the sixth lens 1060 may be aspherical.

[0343] The seventh lens 1070 may have negative refractive power. The object-side surface of the seventh lens 1070 may be concave in the paraxial region. The image-side surface of the seventh lens 1070 may be concave in the paraxial region. The object-side surface of the seventh lens 1070 may be aspherical. The image-side surface of the seventh lens 1070 may be aspherical.

[0344] The object-side surface of the first lens 1010 may include an inflection point. The image-side surface of the first lens 1010 may include an inflection point. The image-side surface of the first lens 1010 may be concave in a paraxial region and may be convex in an off-axis region.

[0345] The object-side surface of the fifth lens 1050 may include an inflection point. The object-side surface of the fifth lens 1050 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 1050 may include an inflection point. The image-side surface of the fifth lens 1050 may be concave in the paraxial region and may be convex in the off-axis region.

[0346] The object-side surface of the sixth lens 1060 may include an inflection point. The object-side surface of the sixth lens 1060 may be convex in a paraxial region and may be concave in an off-axis region.

[0347] The object-side surface of the seventh lens 1070 may include an inflection point. The image-side surface of the seventh lens 1070 may include an inflection point. The image-side surface of the seventh lens 1070 may be concave in a paraxial region and may be convex in an off-axis region.

[0348] At least one of the first to seventh lenses 1010 to 1070 may be formed of glass. For example, the first lens 1010 may be a glass lens.

[0349] In the optical imaging system 1000, f1 / f may be 1.003, v1-v2 may be 63.41, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -2.941, f3 / f may be 2.882, |f4 / f| may be 52.203, |f5 / f| may be 5.576, f6 / f may be 1.384, f7 / f may be -0.631, OAL / f may be 1.061, f1 / f2 may be -0.341, f1 / f3 may be 0.348, BFL / f may be 0.165, D1 / f may be 0.036, OAL / IMG HT / 2 may be 0.597, FOV×IMG HT / f may be 71.054, SAG42 / OAL may be -0.055, SAG52 / OAL may be -0.069, SAG62 / OAL may be -0.146, and SAG72 / OAL may be -0.23.

[0350] Table 19 shows optical and physical parameters of the optical imaging system 1000 according to the tenth example. Table 20 shows aspherical surface data of the optical imaging system 1000.

[0351] Table 19

[0352]

[0353]

[0354] Table 20

[0355]

[0356]

[0357]

[0358] The following will refer to Fig.11A and Fig. 11B An optical imaging system 1100 according to an eleventh example is described.

[0359] Fig.11A is a cross-sectional view showing an optical imaging system 1100 according to an eleventh example. Fig. 11B Graph showing aberration characteristics of the optical imaging system 1100 .

[0360] The optical imaging system 1100 may include a first lens 1110, a second lens 1120, a third lens 1130, a fourth lens 1140, a fifth lens 1150, a sixth lens 1160, a seventh lens 1170, and an image sensor 1190, which are sequentially arranged from the object side toward the image side. The optical imaging system 1100 may include an IR filter 1180 disposed between the seventh lens 1170 and the image sensor 1190.

[0361] The first lens 1110 may have positive refractive power. The object side surface of the first lens 1110 may be convex in the paraxial region. The image side surface of the first lens 1110 may be concave in the paraxial region. The object side surface of the first lens 1110 may be aspherical. The image side surface of the first lens 1110 may be aspherical.

[0362] The second lens 1120 may have negative refractive power. The object side surface of the second lens 1120 may be convex in the paraxial region. The image side surface of the second lens 1120 may be concave in the paraxial region. The object side surface of the second lens 1120 may be aspherical. The image side surface of the second lens 1120 may be aspherical.

[0363] The third lens 1130 may have positive refractive power. The object side surface of the third lens 1130 may be convex in the paraxial region. The image side surface of the third lens 1130 may be concave in the paraxial region. The object side surface of the third lens 1130 may be aspherical. The image side surface of the third lens 1130 may be aspherical.

[0364] The fourth lens 1140 may have negative refractive power. The object-side surface of the fourth lens 1140 may be concave in the paraxial region. The image-side surface of the fourth lens 1140 may be concave in the paraxial region. The object-side surface of the fourth lens 1140 may be aspherical. The image-side surface of the fourth lens 1140 may be aspherical.

[0365] The fifth lens 1150 may have negative refractive power. The object-side surface of the fifth lens 1150 may be convex in the paraxial region. The image-side surface of the fifth lens 1150 may be concave in the paraxial region. The object-side surface of the fifth lens 1150 may be aspherical. The image-side surface of the fifth lens 1150 may be aspherical.

[0366] The sixth lens 1160 may have positive refractive power. The object-side surface of the sixth lens 1160 may be convex in the paraxial region. The image-side surface of the sixth lens 1160 may be convex in the paraxial region. The object-side surface of the sixth lens 1160 may be aspherical. The image-side surface of the sixth lens 1160 may be aspherical.

[0367] The seventh lens 1170 may have negative refractive power. The object-side surface of the seventh lens 1170 may be convex in the paraxial region. The image-side surface of the seventh lens 1170 may be concave in the paraxial region. The object-side surface of the seventh lens 1170 may be aspherical. The image-side surface of the seventh lens 1170 may be aspherical.

[0368] The object-side surface of the first lens 1110 may include an inflection point. The image-side surface of the first lens 1110 may include an inflection point.

[0369] The image-side surface of the fourth lens 1140 may include an inflection point.The image-side surface of the fourth lens 1140 may be concave in a paraxial region and may be convex in an off-axis region.

[0370] The object-side surface of the fifth lens 1150 may include an inflection point. The object-side surface of the fifth lens 1150 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the fifth lens 1150 may include an inflection point. The image-side surface of the fifth lens 1150 may be concave in the paraxial region and may be convex in the off-axis region.

[0371] The object-side surface of the sixth lens 1160 may include an inflection point. The object-side surface of the sixth lens 1160 may be convex in a paraxial region and may be concave in an off-axis region.

[0372] The object-side surface of the seventh lens 1170 may include an inflection point. The object-side surface of the seventh lens 1170 may be convex in the paraxial region and may be concave in the off-axis region. The image-side surface of the seventh lens 1170 may include an inflection point. The image-side surface of the seventh lens 1170 may be concave in the paraxial region and may be convex in the off-axis region.

[0373] At least one of the first to seventh lenses 1110 to 1170 may be formed of glass. For example, the first lens 1110 and the second lens 1120 may be glass lenses.

[0374] In the optical imaging system 1100, f1 / f may be 1.129, v1-v2 may be 50.4, v1-v3 may be 25.82, v1-v4 may be 63.41, f2 / f may be -3.407, f3 / f may be 2.892, |f4 / f| may be 4.691, |f5 / f| may be 10.362, f6 / f may be 1.114, f7 / f may be -0.748, OAL / f may be 1.165, f1 / f2 may be -0.331, f1 / f3 may be 0.39, BFL / f may be 0.172, D1 / f may be 0.029, OAL / IMG HT / 2 may be 0.538, FOV×IMG HT / f may be 98.353, SAG42 / OAL may be -0.046, SAG52 / OAL may be -0.092, SAG62 / OAL may be -0.154, and SAG72 / OAL may be -0.208.

[0375] Table 21 shows optical and physical parameters of the optical imaging system 1100 according to the eleventh example. Table 22 shows aspherical surface data of the optical imaging system 1100.

[0376] Table 21

[0377] noodle Radius of curvature Thickness / distance Refractive Index Abbe number object infinity 1000 1 infinity 0.000 2 1.87 0.740 1.497 81.6 3 5.52 0.137 4 7.57 0.200 1.689 31.2 5 4.46 0.106 6 5.40 0.292 1.535 55.7 7 20.09 0.403 8 -59.46 0.209 1.680 18.2 9 20.55 0.269 10 4.04 0.234 1.614 25.9 11 3.49 0.324 12 6.26 0.412 1.567 37.4 13 -5.63 0.923 14 22.30 0.440 1.535 55.7 15 1.74 0.200 16 0.110 1.517 64.2 17 0.482 Imaging surface 0.020

[0378] Table 22

[0379]

[0380]

[0381]

[0382] As described above, the optical imaging system according to various examples may provide high optical characteristics and have a very thin thickness.

[0383] Although the present disclosure includes specific examples, it will be apparent to those skilled in the art 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 understood in a descriptive sense only and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed to have components in a different order, and / or if they are combined in different ways and / or replaced or supplemented by other components or their equivalents in the described system, architecture, device or circuit, appropriate results can still be achieved. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. An optical imaging system, comprising: A first lens having a positive refractive power; A second lens having a negative refractive power; A third lens having a refractive power; A fourth lens having a refractive power; A fifth lens having a refractive power; A sixth lens having a positive refractive power; And A seventh lens having a negative refractive power, wherein the first lens to the seventh lens are arranged in order from the object side, wherein the optical imaging system has a total of seven lenses, wherein 0 < f1 / f < 1.4, where f is the total focal length of the optical imaging system, and f1 is the focal length of the first lens, and wherein 30 < v1 - v2 < 70 and 5 < v1 - v3 < 55, where v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, and v3 is the Abbe number of the third lens.

2. The optical imaging system according to claim 1, wherein: 30 < v1 - v4 < 70, where v4 is the Abbe number of the fourth lens.

3. The optical imaging system according to claim 1, wherein: OAL / IMG HT / 2 < 0.6, where OAL is the distance from the object side surface of the first lens to the imaging surface, and IMG HT is half of the diagonal length of the imaging surface.

4. The optical imaging system according to claim 1, wherein: -9 < f2 / f < -2, where f2 is the focal length of the second lens.

5. The optical imaging system according to claim 1, wherein: 5 < |f4 / f| < 70, where f4 is the focal length of the fourth lens.

6. The optical imaging system according to claim 1, wherein: 5 < |f5 / f| < 50, where f5 is the focal length of the fifth lens.

7. The optical imaging system according to claim 1, wherein: -3 < f7 / f < 0, where f7 is the focal length of the seventh lens.

8. The optical imaging system according to claim 1, wherein: f1 / f2 < 0, where f2 is the focal length of the second lens.

9. The optical imaging system according to claim 1, wherein: 0 < f1 / f3, where f3 is the focal length of the third lens.

10. The optical imaging system according to claim 1, wherein: D1 / f < 0.1, where 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.

11. The optical imaging system according to claim 1, wherein: OAL / f < 1.3, where OAL is the distance from the object side surface of the first lens to the imaging surface.

12. The optical imaging system according to claim 1, wherein: BFL / f < 0.3, where BFL is the distance on the optical axis from the image side surface of the seventh lens to the imaging surface.

13. The optical imaging system according to claim 1, wherein: 70° < FOV×IMG HT / f, where FOV is the field of view of the optical imaging system, and IMG HT is half of the diagonal length of the imaging surface.

14. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies at least one of the following: -0.1 < SAG42 / OAL < 0, -0.2 < SAG52 / OAL < 0, -0.2 < SAG62 / OAL < 0, and -0.3 < SAG72 / OAL < 0, where SAG42 is the SAG value at the distal end of the effective diameter of the image side surface of the fourth lens, SAG52 is the SAG value at the distal end of the effective diameter of the image side surface of the fifth lens, SAG62 is the SAG value at the distal end of the effective diameter of the image side surface of the sixth lens, and SAG72 is the SAG value at the distal end of the effective diameter of the image side surface of the seventh lens.

15. The optical imaging system of claim 1, wherein: The fifth lens has a negative refractive power.

16. The optical imaging system of claim 1, wherein: The first lens has a convex object side surface and a concave image side surface, the second lens has a convex object side surface and a concave image side surface, and the fifth lens has a convex object side surface and a concave image side surface.

17. The optical imaging system of claim 1, wherein: At least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is a glass lens.

Images