Optical image capturing system

Abstract

The optical imaging system comprises a first lens, a second lens, a third lens, a fourth lens with a convex image side surface, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an imaging surface, and {TTL / (2 * IMG HT)} * Fnot is satisfied; tTL is the distance from the object side surface of the first lens to the imaging surface on the optical axis, IMG HT is half of the diagonal length of the imaging surface, and Fno is the F value of the optical imaging system.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10 - 2024 - 0003422, filed on January 9, 2024, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to an optical imaging system. Background Art

[0004] High - performance cameras are adopted in mobile devices. For example, a large image sensor with a large number of pixels can be adopted in a mobile camera to achieve high - resolution images.

[0005] In such a camera, the lens size generally increases proportionally to the size of the image sensor. However, due to the thickness constraint of the mobile device, it is difficult to match the lens size with the size of the image sensor. In addition, due to the thinning of the mobile device, even if the increase in the lens size is minimized, it is difficult to avoid designs that damage the appearance, such as camera bulges.

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

[0007] The Summary of the Invention section is intended to introduce, in brief form, a selection of concepts that are 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 be used to help determine the scope of the claimed subject matter.

[0008] In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens having a convex image - side surface, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in order from the object side to the imaging surface, where {TTL / (2×IMG HT)}×Fno < 1.000, where TTL is the distance on the optical axis from the object - side surface of the first lens to the imaging surface, IMG HT is half of the diagonal length of the imaging surface, and Fno is the F - number of the optical imaging system.

[0009] The third lens may have a positive refractive power.

[0010] The sixth lens may have a positive refractive power.

[0011] The optical imaging system can satisfy 0 < v1 - (v6 + v7) / 2 < 30.00, where v1 is the Abbe number of the first lens, v6 is the Abbe number of the sixth lens, and v7 is the Abbe number of the seventh lens.

[0012] The optical imaging system can satisfy 0 < f7 / f < 2.000, where f is the focal length of the optical imaging system, and f7 is the focal length of the seventh lens.

[0013] The optical imaging system can satisfy -1.000 < f8 / f < 0, where f is the focal length of the optical imaging system, and f8 is the focal length of the eighth lens.

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

[0015] The Abbe number of the first lens and the Abbe number of the fourth lens can be the same as each other.

[0016] Both the object side surface and the image side surface of the seventh lens can have a convex shape.

[0017] In another general aspect, the optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the imaging surface, where 0.500 ≤ TTL / (2 × IMG HT) < 0.750 and 1.000 < Fno < 1.600 are satisfied, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, IMG HT is half of the diagonal length of the imaging surface, and Fno is the F-number of the optical imaging system.

[0018] The Abbe number of the second lens and the Abbe number of the third lens can be the same as each other.

[0019] The seventh lens can have a positive refractive power and a convex image side surface.

[0020] The third lens can have a negative refractive power, and the sixth lens can have a positive refractive power.

[0021] The optical imaging system can satisfy 1.100 ≤ TTL / f ≤ 1.400, where f is the focal length of the optical imaging system.

[0022] The Abbe number of the first lens and the Abbe number of the fourth lens can be the same as each other.

[0023] The optical imaging system can satisfy {TTL / (2 × IMG HT)} × Fno < 1.000.

[0024] According to an exemplary embodiment of the present disclosure, an optical imaging system that is relatively thin and bright compared to the size of an image sensor can be achieved.

[0025] Other features and aspects will be apparent from the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

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

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

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

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

[0038] Figure 7A is a configuration diagram of an optical imaging system according to a seventh embodiment of the present disclosure;

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

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

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

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

[0043] Figure 9B is a graph showing aberration characteristics of the optical imaging system according to the ninth embodiment of the present disclosure;

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

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

[0046] Figure 11A is a configuration diagram of an optical imaging system according to the eleventh embodiment of the present disclosure;

[0047] Figure 11B is a graph showing aberration characteristics of the optical imaging system according to the eleventh embodiment of the present disclosure;

[0048] Figure 12A is a configuration diagram of an optical imaging system according to the twelfth embodiment of the present disclosure;

[0049] Figure 12B is a graph showing aberration characteristics of the optical imaging system according to the twelfth embodiment of the present disclosure;

[0050] Figure 13A is a configuration diagram of an optical imaging system according to the thirteenth embodiment of the present disclosure; and

[0051] Figure 13B is a graph showing aberration characteristics of the optical imaging system according to the thirteenth embodiment of the present disclosure.

[0052] Throughout the drawings and the detailed description, unless otherwise described, the same reference numerals refer to the same elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of the elements in the drawings may be exaggerated. Detailed Description

[0053] In the following, although examples of the present disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0054] The following specific embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and, except for operations that must occur in a specific order, is not limited to the order set forth herein and may be changed, which will be apparent after understanding the present disclosure. Additionally, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0055] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the present disclosure.

[0056] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "coupled to" another element, the element may be directly "on," directly "connected to," or directly "coupled to" the other element, or there may be one or more other elements intervening between the element and the other element. In contrast, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there are no other elements intervening between the element and the other element.

[0057] As used herein, the phrase "and / or" includes any one of the associated listed items and any combination of any two or more of them; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more of them.

[0058] Although terms such as "first," "second," and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, part, region, layer, or section from another. Thus, the first component, first part, first region, first layer, or first section referred to in these examples may also be referred to as the second component, second part, second region, second layer, or second section without departing from the teachings of the examples described herein.

[0059] Spatial relative terms, such as "above", "upper", "below", "lower", etc., may be used herein for convenience of description to describe the relationship of one element relative to another as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatial relative terms are intended to also cover different orientations of the device during use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "upper" relative to another element will be located "below" or "lower" relative to that other element. Thus, depending on the spatial orientation of the device, the term "above" covers both the 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 spatial relative terms used herein should be interpreted accordingly.

[0060] The terms used herein are only for describing various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the words "a", "an", and "the" are intended to also include the plural forms. The words "comprising", "including", and "having" specify the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0061] Due to manufacturing techniques and / or tolerances, the shapes shown in the accompanying drawings may vary. Accordingly, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that occur during manufacturing.

[0062] It should be noted that, herein, the word "may" is used with respect to examples, e.g., with respect to what an example may include or implement, meaning that there is at least one example in which such a feature is included or implemented, and not all examples are limited thereto.

[0063] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure. In addition, although the examples described herein have various configurations, other configurations will be apparent after understanding the disclosure.

[0064] In one or more examples, the numerical values of the radius of curvature, thickness, gap or distance, focal length, and IMG HT (half of the diagonal length of the imaging plane) of the lens are in millimeters, and the unit of the field of view (FOV) may be degrees. In addition, the thickness of the lens and the gap between the lenses may refer to the thickness and gap on the optical axis, respectively.

[0065] In one or more examples, the object side may indicate the direction in which an object is disposed, and the image side may indicate, for example, the direction in which an imaging surface on which an image is formed is disposed or the direction in which an image sensor is disposed.

[0066] In the description related to the shape of a lens in one or more examples, a disclosure that a surface is convex indicates that the paraxial region (e.g., a quite narrow region near the optical axis) of the corresponding surface is convex, and a disclosure that a surface is concave indicates that the paraxial region of the corresponding surface is concave. Thus, even if a surface of a lens is described as having a convex shape, the edge of the lens may be concave. Similarly, even if a surface of a lens is described as having a concave shape, the edge of the lens may have a convex shape.

[0067] An optical imaging system according to an exemplary embodiment may form part of a camera module mounted on a mobile device. For example, the mobile device may be any type of portable electronic device such as, but not limited to, a mobile communication terminal, a smart phone, or a tablet personal computer (PC).

[0068] In an exemplary embodiment of the present disclosure, the optical imaging system may include eight lenses. For example, 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 eighth lens arranged in order from the object side.

[0069] In addition, the optical imaging system may include not only a plurality of lenses, but also an image sensor that converts incident light into an electrical signal, an infrared blocking filter that blocks light in the infrared region from being incident on the image sensor, and an aperture that adjusts the amount of incident light.

[0070] In an embodiment of the present disclosure, the optical imaging system may include lenses formed of a plastic material. For example, at least some of the first lens to the eighth lens may be formed of a plastic material, and preferably, all of the first lens to the eighth lens may be formed of a plastic material.

[0071] In an exemplary embodiment of the present disclosure, the optical imaging system may include an aspherical lens. For example, at least one of the first lens to the eighth lens may be an aspherical lens, and in at least one of the first lens to the eighth lens, at least one of the object side surface and the image side surface is an aspherical surface. The aspherical surface of the lens is represented by Equation 1.

[0072] Equation 1:

[0073]

[0074] In Equation 1, c represents the reciprocal of the radius of curvature of the lens, K represents the conic constant, and Y represents the distance from an arbitrary point on the aspherical surface of the lens to the optical axis. Additionally, the constants A through H, J, and L through P are aspherical constants from the fourth order to the thirtieth order, and Z is the distance in the optical axis direction between an arbitrary point on the aspherical surface and the vertex of the corresponding aspherical surface.

[0075] In an exemplary embodiment of the present disclosure, the optical imaging system may satisfy one or more of the following conditional equations.

[0076] Conditional Equation 1: 1.100 ≤ TTL / f ≤ 1.400

[0077] Conditional Equation 2: 0.500 ≤ TTL / (2 × IMG HT) < 0.750

[0078] Conditional Equation 3: {TTL / (2 × IMG HT)} × Fno < 1.000

[0079] Conditional Equation 4: 1.000 < Fno < 1.600

[0080] Conditional Equation 5: 0 < v1 - (v6 + v7) / 2 < 30.00

[0081] Conditional Equation 6: 0 < f7 / f < 2.000

[0082] Conditional Equation 7: -1.000 < f8 / f < 0

[0083] Conditional Equation 8: -0.600 < f1 / f2 < 0

[0084] Conditional Equation 9: -1.000 < f1 / f3 < 0.100

[0085] In Conditional Equation 1, TTL represents the distance on the optical axis from the object side surface of the first lens to the imaging surface, and f represents the focal length of the optical imaging system. Conditional Equation 1 relates to the small-size feature of the optical imaging system according to the exemplary embodiment of the present disclosure.

[0086] In Conditional Equation 2, TTL represents the distance on the optical axis from the object side surface of the first lens to the imaging surface, and IMG HT represents half of the diagonal length of the imaging surface (i.e., 2 × IMG HT is the diagonal length of the imaging surface). Conditional Equation 2 relates to the feature that the size of the optical imaging system according to the exemplary embodiment of the present disclosure is smaller than the size of the image sensor.

[0087] Conditional Equation 3 relates to the size and brightness characteristics of the optical imaging system according to the exemplary embodiment of the present disclosure.

[0088] The conditional equation 4 relates to the luminance characteristics of an optical imaging system according to an exemplary embodiment of the present disclosure.

[0089] In the conditional equation 5, v1 represents the Abbe number of the first lens, v6 represents the Abbe number of the sixth lens, and v7 represents the Abbe number of the seventh lens. The conditional equation 5 relates to the design conditions for improving the chromatic aberration correction performance of an optical imaging system according to an exemplary embodiment of the present disclosure.

[0090] In the conditional equation 6, f represents the focal length of the optical imaging system, and f7 represents the focal length of the seventh lens. The conditional equation 6 relates to the conditions for the seventh lens used in the optical imaging system to have an appropriate refractive power according to an exemplary embodiment of the present disclosure.

[0091] In the conditional equation 7, f represents the focal length of the optical imaging system, and f8 represents the focal length of the eighth lens. The conditional equation 7 relates to the conditions for the eighth lens used in the optical imaging system to have an appropriate refractive power according to an exemplary embodiment of the present disclosure.

[0092] In the conditional equation 8, f1 represents the focal length of the first lens, and f2 represents the focal length of the second lens. The conditional equation 8 relates to the conditions for the first lens and the second lens for ensuring the aberration correction performance of the optical imaging system according to an exemplary embodiment of the present disclosure.

[0093] In the conditional equation 9, f1 represents the focal length of the first lens, and f3 represents the focal length of the third lens. The conditional equation 9 relates to the conditions for the first lens and the third lens for ensuring the aberration correction performance of the optical imaging system according to an exemplary embodiment of the present disclosure.

[0094] Hereinafter, an optical imaging system according to an exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0095] First Embodiment

[0096] Figure 1A is a configuration diagram of an optical imaging system according to a first embodiment of the present disclosure. Figure 1B is a graph showing the aberration characteristics of an optical imaging system according to a first embodiment of the present disclosure.

[0097] According to the first embodiment, the optical imaging system 100 may include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, and an eighth lens 180 arranged in sequence from the object side. It may also include an infrared cut-off filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 180. Additionally, the optical imaging system 100 may further include a diaphragm ST disposed between the object side surface and the image side surface of the first lens 110. Furthermore, the optical imaging system 100 may also include a spacer disposed between the second lens 120 and the third lens 130.

[0098] The first lens 110 may have a positive refractive power. The object side surface of the first lens 110 may have a convex shape in the paraxial region, and the image side surface of the first lens 110 may have a concave shape in the paraxial region. The first lens 110 may be formed of a plastic material. Additionally, the first lens 110 may be an aspherical lens. For example, the first lens 110 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0099] The second lens 120 may have a negative refractive power. The object side surface of the second lens 120 may have a convex shape in the paraxial region, and the image side surface of the second lens 120 may have a concave shape in the paraxial region. The second lens 120 may be formed of a plastic material. For example, the second lens 120 may be formed of a plastic material having optical properties different from those of the first lens 110 (e.g., different refractive indices and Abbe numbers). Additionally, the second lens 120 may be an aspherical lens. For example, the second lens 120 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0100] The third lens 130 may have a negative refractive power. The object side surface of the third lens 130 may have a convex shape in the paraxial region, and the image side surface of the third lens 130 may have a concave shape in the paraxial region. The third lens 130 may be formed of a plastic material. For example, the third lens 130 may be formed of a plastic material having the same optical properties as those of the second lens 120 (e.g., the same refractive index and Abbe number). Additionally, the third lens 130 may be an aspherical lens. For example, the third lens 130 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0101] The fourth lens 140 may have a positive refractive power. Both the object side and the image side of the fourth lens 140 may have a convex shape in the paraxial region. The fourth lens 140 may be formed of a plastic material. For example, the fourth lens 140 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 130. At the same time, the fourth lens 140 may be formed of a plastic material having optical properties (e.g., the same refractive index and Abbe number) the same as those of the first lens 110. Additionally, the fourth lens 140 may be an aspherical lens. For example, the fourth lens 140 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0102] The fifth lens 150 may have a negative refractive power. The object side of the fifth lens 150 may have a convex shape in the paraxial region, and the image side of the fifth lens 150 may have a concave shape in the paraxial region. The fifth lens 150 may be formed of a plastic material. For example, the fifth lens 150 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 140. Additionally, the fifth lens 150 may be an aspherical lens. For example, the fifth lens 150 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0103] The sixth lens 160 may have a positive refractive power. The object side of the sixth lens 160 may have a convex shape in the paraxial region, and the image side of the sixth lens 160 may have a concave shape in the paraxial region. The sixth lens 160 may be formed of a plastic material. For example, the sixth lens 160 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 150. Additionally, the sixth lens 160 may be an aspherical lens. For example, the sixth lens 160 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0104] The seventh lens 170 may have a positive refractive power. The object side of the seventh lens 170 may have a convex shape in the paraxial region, and the image side of the seventh lens 170 may have a concave shape in the paraxial region. The seventh lens 170 may be formed of a plastic material. For example, the seventh lens 170 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 160. Additionally, the seventh lens 170 may be an aspherical lens. For example, the seventh lens 170 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0105] The eighth lens 180 may have a negative refractive power. The object side surface of the eighth lens 180 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 180 may have a concave shape in the paraxial region. The eighth lens 180 may be formed of a plastic material. For example, the eighth lens 180 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 170. Additionally, the eighth lens 180 may be an aspherical lens. For example, the eighth lens 180 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0106] Table 1 below shows the optical parameters and physical parameters of the optical imaging system 100 according to the first embodiment of the present disclosure.

[0107] Table 1

[0108]

[0109]

[0110] Table 2 below shows the aspherical data of the optical imaging system 100 according to the first embodiment of the present disclosure.

[0111] Table 2

[0112]

[0113]

[0114] Second Embodiment

[0115] Figure 2A is a configuration diagram of an optical imaging system according to the second embodiment of the present disclosure. Figure 2B is a graph showing the aberration characteristics of the optical imaging system according to the second embodiment of the present disclosure.

[0116] According to the second embodiment, the optical imaging system 200 may include a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, and an eighth lens 280 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging surface IP) disposed on the image side of the eighth lens 280. Additionally, the optical imaging system 200 may further include a diaphragm ST disposed between the object side surface and the image side surface of the first lens 210. Furthermore, the optical imaging system 200 may further include a spacer disposed between the second lens 220 and the third lens 230.

[0117] The first lens 210 may have a positive refractive power. The object side surface of the first lens 210 may have a convex shape in the paraxial region, and the image side surface of the first lens 210 may have a concave shape in the paraxial region. The first lens 210 may be formed of a plastic material. In addition, the first lens 210 may be an aspherical lens. For example, the first lens 210 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0118] The second lens 220 may have a negative refractive power. The object side surface of the second lens 220 may have a convex shape in the paraxial region, and the image side surface of the second lens 220 may have a concave shape in the paraxial region. The second lens 220 may be formed of a plastic material. For example, the second lens 220 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 210. Additionally, the second lens 220 may be an aspherical lens. For example, the second lens 220 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0119] The third lens 230 may have a negative refractive power. The object side surface of the third lens 230 may have a convex shape in the paraxial region, and the image side surface of the third lens 230 may have a concave shape in the paraxial region. The third lens 230 may be formed of a plastic material. For example, the third lens 230 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 220. Additionally, the third lens 230 may be an aspherical lens. For example, the third lens 230 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0120] The fourth lens 240 may have a positive refractive power. The object side surface of the fourth lens 240 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 240 may have a convex shape in the paraxial region. The fourth lens 240 may be formed of a plastic material. For example, the fourth lens 240 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 230. At the same time, the fourth lens 240 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 210. Additionally, the fourth lens 240 may be an aspherical lens. For example, the fourth lens 240 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0121] The fifth lens 250 may have a negative refractive power. The object side surface of the fifth lens 250 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 250 may have a concave shape in the paraxial region. The fifth lens 250 may be formed of a plastic material. For example, the fifth lens 250 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 240. Additionally, the fifth lens 250 may be an aspherical lens. For example, the fifth lens 250 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0122] The sixth lens 260 may have a negative refractive power. The object side surface of the sixth lens 260 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 260 may have a concave shape in the paraxial region. The sixth lens 260 may be formed of a plastic material. For example, the sixth lens 260 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 250. Additionally, the sixth lens 260 may be an aspherical lens. For example, the sixth lens 260 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0123] The seventh lens 270 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 270 may have a convex shape in the paraxial region. The seventh lens 270 may be formed of a plastic material. For example, the seventh lens 270 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 260. Additionally, the seventh lens 270 may be an aspherical lens. For example, the seventh lens 270 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0124] The eighth lens 280 may have a negative refractive power. The object side surface of the eighth lens 280 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 280 may have a concave shape in the paraxial region. The eighth lens 280 may be formed of a plastic material. For example, the eighth lens 280 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 270. Additionally, the eighth lens 280 may be an aspherical lens. For example, the eighth lens 280 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0125] Table 3 below shows the optical parameters and physical parameters of the optical imaging system 200 according to the second embodiment of the present disclosure.

[0126] Table 3

[0127]

[0128]

[0129] Table 4 below shows the aspherical data of the optical imaging system 200 according to the second embodiment of the present disclosure.

[0130] Table 4

[0131]

[0132]

[0133] Third Embodiment

[0134] Figure 3A is a configuration diagram of an optical imaging system according to the third embodiment of the present disclosure. Figure 3B is a graph showing the aberration characteristics of the optical imaging system according to the third embodiment of the present disclosure.

[0135] According to the third embodiment, the optical imaging system 300 may include a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, and an eighth lens 380 arranged in order from the object side, and may further include an infrared cut-off filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 380. In addition, the optical imaging system 300 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 310. Further, the optical imaging system 300 may further include a spacer disposed between the second lens 320 and the third lens 330.

[0136] The first lens 310 may have a positive refractive power. The object side surface of the first lens 310 may have a convex shape in the paraxial region, and the image side surface of the first lens 310 may have a concave shape in the paraxial region. The first lens 310 may be formed of a plastic material. In addition, the first lens 310 may be an aspherical lens. For example, the first lens 310 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0137] The second lens 320 may have a negative refractive power. The object side surface of the second lens 320 may have a convex shape in the paraxial region, and the image side surface of the second lens 320 may have a concave shape in the paraxial region. The second lens 320 may be formed of a plastic material. For example, the second lens 320 may be formed of a plastic material having optical characteristics (e.g., different refractive indices and Abbe numbers) different from those of the first lens 310. In addition, the second lens 320 may be an aspherical lens. For example, the second lens 320 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0138] The third lens 330 may have a positive refractive power. The object side surface of the third lens 330 may have a convex shape in the paraxial region, and the image side surface of the third lens 330 may have a concave shape in the paraxial region. The third lens 330 may be formed of a plastic material. For example, the third lens 330 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 320. In addition, the third lens 330 may be an aspherical lens. For example, the third lens 330 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0139] The fourth lens 340 may have a positive refractive power. The object side surface of the fourth lens 340 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 340 may have a convex shape in the paraxial region. The fourth lens 340 may be formed of a plastic material. For example, the fourth lens 340 may be formed of a plastic material having optical properties different from those of the third lens 330 (e.g., different refractive index and Abbe number). At the same time, the fourth lens 340 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 310. In addition, the fourth lens 340 may be an aspherical lens. For example, the fourth lens 340 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0140] The fifth lens 350 may have a negative refractive power. The object side surface of the fifth lens 350 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 350 may have a concave shape in the paraxial region. The fifth lens 350 may be formed of a plastic material. For example, the fifth lens 350 may be formed of a plastic material having optical properties different from those of the fourth lens 340 (e.g., different refractive index and Abbe number). Additionally, the fifth lens 350 may be an aspherical lens. For example, the fifth lens 350 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0141] The sixth lens 360 may have a negative refractive power. The object side surface of the sixth lens 360 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 360 may have a concave shape in the paraxial region. The sixth lens 360 may be formed of a plastic material. For example, the sixth lens 360 may be formed of a plastic material having optical properties different from those of the fifth lens 350 (e.g., different refractive index and Abbe number). Additionally, the sixth lens 360 may be an aspherical lens. For example, the sixth lens 360 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0142] The seventh lens 370 may have a positive refractive power. Both the object side and the image side of the seventh lens 370 may have a convex shape in the paraxial region. The seventh lens 370 may be formed of a plastic material. For example, the seventh lens 370 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 360. Additionally, the seventh lens 370 may be an aspherical lens. For example, the seventh lens 370 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0143] The eighth lens 380 may have a negative refractive power. The object side of the eighth lens 380 may have a convex shape in the paraxial region, and the image side of the eighth lens 380 may have a concave shape in the paraxial region. The eighth lens 380 may be formed of a plastic material. For example, the eighth lens 380 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 370. Additionally, the eighth lens 380 may be an aspherical lens. For example, the eighth lens 380 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0144] Table 5 below shows the optical parameters and physical parameters of the optical imaging system 300 according to the third embodiment of the present disclosure.

[0145] Table 5

[0146]

[0147]

[0148] Table 6 below shows the aspherical data of the optical imaging system 300 according to the third embodiment of the present disclosure.

[0149] Table 6

[0150]

[0151]

[0152] Fourth Embodiment

[0153] Figure 4A is a configuration diagram of an optical imaging system according to a fourth embodiment of the present disclosure, and Figure 4B is a graph showing the aberration characteristics of the optical imaging system according to a fourth embodiment of the present disclosure.

[0154] According to the fourth embodiment, the optical imaging system 400 may include a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, and an eighth lens 480 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 480. Additionally, the optical imaging system 400 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 410. Furthermore, the optical imaging system 400 may further include a spacer disposed between the second lens 420 and the third lens 430.

[0155] The first lens 410 may have a positive refractive power. The object side surface of the first lens 410 may have a convex shape in the paraxial region, and the image side surface of the first lens 410 may have a concave shape in the paraxial region. The first lens 410 may be formed of a plastic material. Additionally, the first lens 410 may be an aspherical lens. For example, the first lens 410 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0156] The second lens 420 may have a negative refractive power. The object side surface of the second lens 420 may have a convex shape in the paraxial region, and the image side surface of the second lens 420 may have a concave shape in the paraxial region. The second lens 420 may be formed of a plastic material. For example, the second lens 420 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 410. Additionally, the second lens 420 may be an aspherical lens. For example, the second lens 420 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0157] The third lens 430 may have a positive refractive power. The object side surface of the third lens 430 may have a convex shape in the paraxial region, and the image side surface of the third lens 430 may have a concave shape in the paraxial region. The third lens 430 may be formed of a plastic material. For example, the third lens 430 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 420. Additionally, the third lens 430 may be an aspherical lens. For example, the third lens 430 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0158] The fourth lens 440 may have a positive refractive power. The object side surface of the fourth lens 440 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 440 may have a convex shape in the paraxial region. The fourth lens 440 may be formed of a plastic material. For example, the fourth lens 440 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 430. At the same time, the fourth lens 440 may be formed of a plastic material having optical properties (e.g., the same refractive index and Abbe number) the same as those of the first lens 410. Additionally, the fourth lens 440 may be an aspherical lens. For example, the fourth lens 440 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0159] The fifth lens 450 may have a negative refractive power. The object side surface of the fifth lens 450 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 450 may have a concave shape in the paraxial region. The fifth lens 450 may be formed of a plastic material. For example, the fifth lens 450 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 440. Additionally, the fifth lens 450 may be an aspherical lens. For example, the fifth lens 450 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0160] The sixth lens 460 may have a negative refractive power. The object side surface of the sixth lens 460 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 460 may have a concave shape in the paraxial region. The sixth lens 460 may be formed of a plastic material. For example, the sixth lens 460 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 450. Additionally, the sixth lens 460 may be an aspherical lens. For example, the sixth lens 460 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0161] The seventh lens 470 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 470 may have a convex shape in the paraxial region. The seventh lens 470 may be formed of a plastic material. For example, the seventh lens 470 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 460. Additionally, the seventh lens 470 may be an aspherical lens. For example, the seventh lens 470 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0162] The eighth lens 480 may have a negative refractive power. The object side surface of the eighth lens 480 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 480 may have a concave shape in the paraxial region. The eighth lens 480 may be formed of a plastic material. For example, the eighth lens 480 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 470. Additionally, the eighth lens 480 may be an aspherical lens. For example, the eighth lens 480 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

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

[0164] Table 7

[0165]

[0166]

[0167] Table 8 below shows the aspherical data of the optical imaging system 400 according to the fourth embodiment of the present disclosure.

[0168] Table 8

[0169]

[0170]

[0171] Fifth Embodiment

[0172] Figure 5A is a configuration diagram of an optical imaging system according to the fifth embodiment of the present disclosure. Figure 5B is a graph showing the aberration characteristics of the optical imaging system according to the fifth embodiment of the present disclosure.

[0173] According to the fifth embodiment, the optical imaging system 500 may include a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, and an eighth lens 580 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging surface IP) disposed on the image side of the eighth lens 580. In addition, the optical imaging system 500 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 510. In addition, the optical imaging system 500 may further include a spacer disposed between the second lens 520 and the third lens 530.

[0174] The first lens 510 may have a positive refractive power. The object side surface of the first lens 510 may have a convex shape in the paraxial region, and the image side surface of the first lens 510 may have a concave shape in the paraxial region. The first lens 510 may be formed of a plastic material. Additionally, the first lens 510 may be an aspherical lens. For example, the first lens 510 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0175] The second lens 520 may have a negative refractive power. The object side surface of the second lens 520 may have a convex shape in the paraxial region, and the image side surface of the second lens 520 may have a concave shape in the paraxial region. The second lens 520 may be formed of a plastic material. For example, the second lens 520 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 510. Additionally, the second lens 520 may be an aspherical lens. For example, the second lens 520 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0176] The third lens 530 may have a negative refractive power. The object side surface of the third lens 530 may have a convex shape in the paraxial region, and the image side surface of the third lens 530 may have a concave shape in the paraxial region. The third lens 530 may be formed of a plastic material. For example, the third lens 530 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 520. Additionally, the third lens 530 may be an aspherical lens. For example, the third lens 530 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0177] The fourth lens 540 may have a positive refractive power. The object side surface of the fourth lens 540 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 540 may have a convex shape in the paraxial region. The fourth lens 540 may be formed of a plastic material. For example, the fourth lens 540 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 530. At the same time, the fourth lens 540 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 510. Additionally, the fourth lens 540 may be an aspherical lens. For example, the fourth lens 540 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0178] The fifth lens 550 may have a negative refractive power. The object side surface of the fifth lens 550 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 550 may have a concave shape in the paraxial region. The fifth lens 550 may be formed of a plastic material. For example, the fifth lens 550 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 540. Additionally, the fifth lens 550 may be an aspherical lens. For example, the fifth lens 550 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0179] The sixth lens 560 may have a negative refractive power. The object side surface of the sixth lens 560 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 560 may have a concave shape in the paraxial region. The sixth lens 560 may be formed of a plastic material. For example, the sixth lens 560 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 550. Additionally, the sixth lens 560 may be an aspherical lens. For example, the sixth lens 560 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0180] The seventh lens 570 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 570 may have a convex shape in the paraxial region. The seventh lens 570 may be formed of a plastic material. For example, the seventh lens 570 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 560. Additionally, the seventh lens 570 may be an aspherical lens. For example, the seventh lens 570 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0181] The eighth lens 580 may have a negative refractive power. The object side surface of the eighth lens 580 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 580 may have a concave shape in the paraxial region. The eighth lens 580 may be formed of a plastic material. For example, the eighth lens 580 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 570. Additionally, the eighth lens 580 may be an aspherical lens. For example, the eighth lens 580 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0182] Table 9 below shows the optical parameters and physical parameters of the optical imaging system 500 according to the fifth embodiment of the present disclosure.

[0183] Table 9

[0184]

[0185]

[0186] Table 10 below shows the aspherical data of the optical imaging system 500 according to the fifth embodiment of the present disclosure.

[0187] Table 10

[0188]

[0189]

[0190] Sixth Embodiment

[0191] Figure 6A is a configuration diagram of an optical imaging system according to the sixth embodiment of the present disclosure. Figure 6B is a graph showing the aberration characteristics of the optical imaging system according to the sixth embodiment of the present disclosure.

[0192] According to the sixth embodiment, the optical imaging system 600 may include a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, and an eighth lens 680 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 680. In addition, the optical imaging system 600 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 610. Furthermore, the optical imaging system 600 may further include a spacer disposed between the second lens 620 and the third lens 630.

[0193] The first lens 610 may have a positive refractive power. The object side surface of the first lens 610 may have a convex shape in the paraxial region, and the image side surface of the first lens 610 may have a concave shape in the paraxial region. The first lens 610 may be formed of a plastic material. In addition, the first lens 610 may be an aspherical lens. For example, the first lens 610 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0194] The second lens 620 may have a negative refractive power. The object side of the second lens 620 may have a convex shape in the paraxial region, and the image side of the second lens 620 may have a concave shape in the paraxial region. The second lens 620 may be formed of a plastic material. For example, the second lens 620 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 610. Additionally, the second lens 620 may be an aspherical lens. For example, the second lens 620 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0195] The third lens 630 may have a negative refractive power. The object side of the third lens 630 may have a convex shape in the paraxial region, and the image side of the third lens 630 may have a concave shape in the paraxial region. The third lens 630 may be formed of a plastic material. For example, the third lens 630 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 620. Additionally, the third lens 630 may be an aspherical lens. For example, the third lens 630 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0196] The fourth lens 640 may have a positive refractive power. The object side of the fourth lens 640 may have a concave shape in the paraxial region, and the image side of the fourth lens 640 may have a convex shape in the paraxial region. The fourth lens 640 may be formed of a plastic material. For example, the fourth lens 640 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 630. At the same time, the fourth lens 640 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 610. Additionally, the fourth lens 640 may be an aspherical lens. For example, the fourth lens 640 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0197] The fifth lens 650 may have a negative refractive power. The object side of the fifth lens 650 may have a convex shape in the paraxial region, and the image side of the fifth lens 650 may have a concave shape in the paraxial region. The fifth lens 650 may be formed of a plastic material. For example, the fifth lens 650 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 640. Additionally, the fifth lens 650 may be an aspherical lens. For example, the fifth lens 650 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0198] The sixth lens 660 may have a negative refractive power. The object side surface of the sixth lens 660 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 660 may have a concave shape in the paraxial region. The sixth lens 660 may be formed of a plastic material. For example, the sixth lens 660 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 650. Additionally, the sixth lens 660 may be an aspherical lens. For example, the sixth lens 660 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0199] The seventh lens 670 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 670 may have a convex shape in the paraxial region. The seventh lens 670 may be formed of a plastic material. For example, the seventh lens 670 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 660. Additionally, the seventh lens 670 may be an aspherical lens. For example, the seventh lens 670 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0200] The eighth lens 680 may have a negative refractive power. The object side surface of the eighth lens 680 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 680 may have a concave shape in the paraxial region. The eighth lens 680 may be formed of a plastic material. For example, the eighth lens 680 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 670. Additionally, the eighth lens 680 may be an aspherical lens. For example, the eighth lens 680 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0201] Table 11 below shows the optical parameters and physical parameters of the optical imaging system 600 according to the sixth embodiment of the present disclosure.

[0202] Table 11

[0203]

[0204]

[0205] Table 12 below shows the aspherical data of the optical imaging system 600 according to the sixth embodiment of the present disclosure.

[0206] Table 12

[0207]

[0208]

[0209] Seventh Embodiment

[0210] Figure 7A It is a configuration diagram of an optical imaging system according to the seventh embodiment of the present disclosure. Figure 7B It is a graph showing the aberration characteristics of the optical imaging system according to the seventh embodiment of the present disclosure.

[0211] According to the seventh embodiment, the optical imaging system 700 may include a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, and an eighth lens 780 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., an imaging surface IP) provided on the image side of the eighth lens 780. In addition, the optical imaging system 700 may further include a diaphragm ST provided between the object side surface and the image side surface of the first lens 710. Furthermore, the optical imaging system 700 may further include a spacer between the second lens 720 and the third lens 730.

[0212] The first lens 710 may have a positive refractive power. The object side surface of the first lens 710 may have a convex shape in the paraxial region, and the image side surface of the first lens 710 may have a concave shape in the paraxial region. The first lens 710 may be formed of a plastic material. In addition, the first lens 710 may be an aspherical lens. For example, the first lens 710 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0213] The second lens 720 may have a negative refractive power. The object side surface of the second lens 720 may have a convex shape in the paraxial region, and the image side surface of the second lens 720 may have a concave shape in the paraxial region. The second lens 720 may be formed of a plastic material. For example, the second lens 720 may be formed of a plastic material having optical characteristics (e.g., different refractive indices and Abbe numbers) different from those of the first lens 710. In addition, the second lens 720 may be an aspherical lens. For example, the second lens 720 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0214] The third lens 730 may have a positive refractive power. The object side surface of the third lens 730 may have a convex shape in the paraxial region, and the image side surface of the third lens 730 may have a concave shape in the paraxial region. The third lens 730 may be formed of a plastic material. For example, the third lens 730 may be formed of a plastic material having the same optical characteristics (e.g., the same refractive index and Abbe number) as those of the second lens 720. In addition, the third lens 730 may be an aspherical lens. For example, the third lens 730 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0215] The fourth lens 740 may have a positive refractive power. The object side of the fourth lens 740 may have a concave shape in the paraxial region, and the image side of the fourth lens 740 may have a convex shape in the paraxial region. The fourth lens 740 may be formed of a plastic material. For example, the fourth lens 740 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 730. At the same time, the fourth lens 740 may be formed of a plastic material having optical properties (e.g., the same refractive index and Abbe number) the same as those of the first lens 710. Additionally, the fourth lens 740 may be an aspherical lens. For example, the fourth lens 740 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0216] The fifth lens 750 may have a negative refractive power. The object side of the fifth lens 750 may have a convex shape in the paraxial region, and the image side of the fifth lens 750 may have a concave shape in the paraxial region. The fifth lens 750 may be formed of a plastic material. For example, the fifth lens 750 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 740. Additionally, the fifth lens 750 may be an aspherical lens. For example, the fifth lens 750 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0217] The sixth lens 760 may have a negative refractive power. The object side of the sixth lens 760 may have a convex shape in the paraxial region, and the image side of the sixth lens 760 may have a concave shape in the paraxial region. The sixth lens 760 may be formed of a plastic material. For example, the sixth lens 760 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 750. Furthermore, the sixth lens 760 may be an aspherical lens. For example, the sixth lens 760 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0218] The seventh lens 770 may have a positive refractive power. Both the object side and the image side of the seventh lens 770 may have a convex shape in the paraxial region. The seventh lens 770 may be formed of a plastic material. For example, the seventh lens 770 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 760. Additionally, the seventh lens 770 may be an aspherical lens. For example, the seventh lens 770 may be a double-sided aspherical lens in which both its object side and image side are aspherical.

[0219] The eighth lens 780 may have a negative refractive power. The object side surface of the eighth lens 780 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 780 may have a concave shape in the paraxial region. The eighth lens 780 may be formed of a plastic material. For example, the eighth lens 780 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 770. In addition, the eighth lens 780 may be an aspherical lens. For example, the eighth lens 780 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0220] Table 13 below shows the optical parameters and physical parameters of the optical imaging system 700 according to the seventh embodiment of the present disclosure.

[0221] Table 13

[0222]

[0223]

[0224] Table 14 below shows the aspherical data of the optical imaging system 700 according to the seventh embodiment of the present disclosure.

[0225] Table 14

[0226]

[0227]

[0228] Eighth Embodiment

[0229] Figure 8A is a configuration diagram of an optical imaging system according to the eighth embodiment of the present disclosure. Figure 8B is a graph showing the aberration characteristics of an optical imaging system according to the eighth embodiment of the present disclosure.

[0230] According to the eighth embodiment, the optical imaging system 800 may include a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, and an eighth lens 880 arranged in order from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., an imaging surface IP) provided on the image side of the eighth lens 880. In addition, the optical imaging system 800 may further include an aperture ST provided between the object side surface and the image side surface of the first lens 810. Furthermore, the optical imaging system 800 may further include a spacer disposed between the second lens 820 and the third lens 830.

[0231] The first lens 810 may have a positive refractive power. The object side of the first lens 810 may have a convex shape in the paraxial region, and the image side of the first lens 810 may have a concave shape in the paraxial region. The first lens 810 may be formed of a plastic material. Additionally, the first lens 810 may be an aspherical lens. For example, the first lens 810 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0232] The second lens 820 may have a negative refractive power. The object side of the second lens 820 may have a convex shape in the paraxial region, and the image side of the second lens 820 may have a concave shape in the paraxial region. The second lens 820 may be formed of a plastic material. For example, the second lens 820 may be formed of a plastic material having optical properties different from those of the first lens 810 (e.g., different refractive indices and Abbe numbers). Further, the second lens 820 may be an aspherical lens. For example, the second lens 820 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0233] The third lens 830 may have a negative refractive power. The object side of the third lens 830 may have a convex shape in the paraxial region, and the image side of the third lens 830 may have a concave shape in the paraxial region. The third lens 830 may be formed of a plastic material. For example, the third lens 830 may be formed of a plastic material having the same optical properties as those of the second lens 820 (e.g., the same refractive index and Abbe number). Further, the third lens 830 may be an aspherical lens. For example, the third lens 830 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0234] The fourth lens 840 may have a positive refractive power. The object side of the fourth lens 840 may have a concave shape in the paraxial region, and the image side of the fourth lens 840 may have a convex shape in the paraxial region. The fourth lens 840 may be formed of a plastic material. For example, the fourth lens 840 may be formed of a plastic material having optical properties different from those of the third lens 830 (e.g., different refractive indices and Abbe numbers). At the same time, the fourth lens 840 may be formed of a plastic material having the same optical properties as those of the first lens 810 (e.g., the same refractive index and Abbe number). Additionally, the fourth lens 840 may be an aspherical lens. For example, the fourth lens 840 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0235] The fifth lens 850 may have a negative refractive power. The object side surface of the fifth lens 850 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 850 may have a concave shape in the paraxial region. The fifth lens 850 may be formed of a plastic material. For example, the fifth lens 850 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 840. In addition, the fifth lens 850 may be an aspherical lens. For example, the fifth lens 850 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0236] The sixth lens 860 may have a positive refractive power. The object side surface of the sixth lens 860 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 860 may have a concave shape in the paraxial region. The sixth lens 860 may be formed of a plastic material. For example, the sixth lens 860 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 850. Additionally, the sixth lens 860 may be an aspherical lens. For example, the sixth lens 860 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0237] The seventh lens 870 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 870 may have a convex shape in the paraxial region. The seventh lens 870 may be formed of a plastic material. For example, the seventh lens 870 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 860. Additionally, the seventh lens 870 may be an aspherical lens. For example, the seventh lens 870 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0238] The eighth lens 880 may have a negative refractive power. The object side surface of the eighth lens 880 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 880 may have a concave shape in the paraxial region. The eighth lens 880 may be formed of a plastic material. For example, the eighth lens 880 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 870. Additionally, the eighth lens 880 may be an aspherical lens. For example, the eighth lens 880 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0239] Table 15 below shows the optical parameters and physical parameters of the optical imaging system 800 according to the eighth embodiment of the present disclosure.

[0240] Table 15

[0241]

[0242]

[0243] Table 16 below shows the aspherical data of the optical imaging system 800 according to the eighth embodiment of the present disclosure.

[0244] Table 16

[0245]

[0246]

[0247] Ninth Embodiment

[0248] Figure 9A is a configuration diagram of an optical imaging system according to the ninth embodiment of the present disclosure. Figure 9B is a graph showing the aberration characteristics of the optical imaging system according to the ninth embodiment of the present disclosure.

[0249] According to the ninth embodiment, the optical imaging system 900 may include a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, and an eighth lens 980 arranged in sequence from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 980. In addition, the optical imaging system 900 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 910. Furthermore, the optical imaging system 900 may further include a spacer disposed between the second lens 920 and the third lens 930.

[0250] The first lens 910 may have a positive refractive power. The object side surface of the first lens 910 may have a convex shape in the paraxial region, and the image side surface of the first lens 910 may have a concave shape in the paraxial region. The first lens 910 may be formed of a plastic material. In addition, the first lens 910 may be an aspherical lens. For example, the first lens 910 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0251] The second lens 920 may have a negative refractive power. The object side surface of the second lens 920 may have a convex shape in the paraxial region, and the image side surface of the second lens 920 may have a concave shape in the paraxial region. The second lens 920 may be formed of a plastic material. For example, the second lens 920 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 910. Additionally, the second lens 920 may be an aspherical lens. For example, the second lens 920 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0252] The third lens 930 may have a negative refractive power. The object side surface of the third lens 930 may have a convex shape in the paraxial region, and the image side surface of the third lens 930 may have a concave shape in the paraxial region. The third lens 930 may be formed of a plastic material. For example, the third lens 930 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 920. Additionally, the third lens 930 may be an aspherical lens. For example, the third lens 930 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0253] The fourth lens 940 may have a positive refractive power. The object side surface of the fourth lens 940 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 940 may have a convex shape in the paraxial region. The fourth lens 940 may be formed of a plastic material. For example, the fourth lens 940 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 930. At the same time, the fourth lens 940 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 910. Additionally, the fourth lens 940 may be an aspherical lens. For example, the fourth lens 940 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0254] The fifth lens 950 may have a negative refractive power. The object side surface of the fifth lens 950 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 950 may have a concave shape in the paraxial region. The fifth lens 950 may be formed of a plastic material. For example, the fifth lens 950 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 940. Additionally, the fifth lens 950 may be an aspherical lens. For example, the fifth lens 950 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0255] The sixth lens 960 may have a positive refractive power. The object side surface of the sixth lens 960 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 960 may have a concave shape in the paraxial region. The sixth lens 960 may be formed of a plastic material. For example, the sixth lens 960 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 950. Additionally, the sixth lens 960 may be an aspherical lens. For example, the sixth lens 960 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0256] The seventh lens 970 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 970 may have a convex shape in the paraxial region. The seventh lens 970 may be formed of a plastic material. For example, the seventh lens 970 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 960. Further, the seventh lens 970 may be an aspherical lens. For example, the seventh lens 970 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0257] The eighth lens 980 may have a negative refractive power. The object side surface of the eighth lens 980 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 980 may have a concave shape in the paraxial region. The eighth lens 980 may be formed of a plastic material. For example, the eighth lens 980 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 970. Additionally, the eighth lens 980 may be an aspherical lens. For example, the eighth lens 980 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0258] Table 17 below shows the optical parameters and physical parameters of the optical imaging system 900 according to the ninth embodiment of the present disclosure.

[0259] Table 17

[0260]

[0261]

[0262] Table 18 below shows the aspherical data of the optical imaging system 900 according to the ninth embodiment of the present disclosure.

[0263] Table 18

[0264]

[0265]

[0266] Tenth Embodiment

[0267] Figure 10A It is a configuration diagram of an optical imaging system according to a tenth embodiment of the present disclosure. Figure 10B It is a graph showing the aberration characteristics of the optical imaging system according to the tenth embodiment of the present disclosure.

[0268] According to the tenth embodiment, the optical imaging system 1000 may include a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, a sixth lens 1060, a seventh lens 1070, and an eighth lens 1080 arranged in sequence from the object side. It may also include an infrared blocking filter F and an image sensor (i.e., imaging surface IP) provided on the image side of the eighth lens 1080. Additionally, the optical imaging system 1000 may further include an aperture ST provided between the object side surface and the image side surface of the first lens 1010. Moreover, the optical imaging system 1000 may further include a spacer disposed between the second lens 1020 and the third lens 1030.

[0269] The first lens 1010 may have a positive refractive power. The object side surface of the first lens 1010 may have a convex shape in the paraxial region, and the image side surface of the first lens 1010 may have a concave shape in the paraxial region. The first lens 1010 may be formed of a plastic material. Additionally, the first lens 1010 may be an aspherical lens. For example, the first lens 1010 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0270] The second lens 1020 may have a negative refractive power. The object side surface of the second lens 1020 may have a convex shape in the paraxial region, and the image side surface of the second lens 1020 may have a concave shape in the paraxial region. The second lens 1020 may be formed of a plastic material. For example, the second lens 1020 may be formed of a plastic material having optical characteristics different from those of the first lens 1010 (e.g., different refractive indices and Abbe numbers). Additionally, the second lens 1020 may be an aspherical lens. For example, the second lens 1020 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0271] The third lens 1030 may have a negative refractive power. The object side surface of the third lens 1030 may have a convex shape in the paraxial region, and the image side surface of the third lens 1030 may have a concave shape in the paraxial region. The third lens 1030 may be formed of a plastic material. For example, the third lens 1030 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 1020. Additionally, the third lens 1030 may be an aspherical lens. For example, the third lens 1030 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical surfaces.

[0272] The fourth lens 1040 may have a positive refractive power. The object side surface of the fourth lens 1040 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 1040 may have a convex shape in the paraxial region. The fourth lens 1040 may be formed of a plastic material. For example, the fourth lens 1040 may be formed of a plastic material having optical properties different from those of the third lens 1030 (e.g., different refractive index and Abbe number). At the same time, the fourth lens 1040 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 1010. Additionally, the fourth lens 1040 may be an aspherical lens. For example, the fourth lens 1040 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0273] The fifth lens 1050 may have a negative refractive power. The object side surface of the fifth lens 1050 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 1050 may have a concave shape in the paraxial region. The fifth lens 1050 may be formed of a plastic material. For example, the fifth lens 1050 may be formed of a plastic material having optical properties different from those of the fourth lens 1040 (e.g., different refractive index and Abbe number). Furthermore, the fifth lens 1050 may be an aspherical lens. For example, the fifth lens 1050 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0274] The sixth lens 1060 may have a positive refractive power. The object side surface of the sixth lens 1060 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 1060 may have a concave shape in the paraxial region. The sixth lens 1060 may be formed of a plastic material. For example, the sixth lens 1060 may be formed of a plastic material having optical properties different from those of the fifth lens 1050 (e.g., different refractive index and Abbe number). Additionally, the sixth lens 1060 may be an aspherical lens. For example, the sixth lens 1060 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0275] The seventh lens 1070 may have a positive refractive power. Both the object side and the image side of the seventh lens 1070 may have a convex shape in the paraxial region. The seventh lens 1070 may be formed of a plastic material. For example, the seventh lens 1070 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 1060. Additionally, the seventh lens 1070 may be an aspherical lens. For example, the seventh lens 1070 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0276] The eighth lens 1080 may have a negative refractive power. The object side of the eighth lens 1080 may have a convex shape in the paraxial region, and the image side of the eighth lens 1080 may have a concave shape in the paraxial region. The eighth lens 1080 may be formed of a plastic material. For example, the eighth lens 1080 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 1070. Additionally, the eighth lens 1080 may be an aspherical lens. For example, the eighth lens 1080 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0277] Table 19 below shows the optical parameters and physical parameters of the optical imaging system 1000 according to the tenth embodiment of the present disclosure.

[0278] Table 19

[0279]

[0280]

[0281] Table 20 below shows the aspherical data of the optical imaging system 1000 according to the tenth embodiment of the present disclosure.

[0282] Table 20

[0283]

[0284]

[0285] Eleventh Embodiment

[0286] Figure 11A is a configuration diagram of an optical imaging system according to the eleventh embodiment of the present disclosure. Figure 11B is a graph showing the aberration characteristics of the optical imaging system according to the eleventh embodiment of the present disclosure.

[0287] According to the eleventh embodiment, 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 eighth lens 1180 arranged in sequence from the object side. It may also include an infrared cut-off filter F and an image sensor (i.e., imaging plane IP) disposed on the image side of the eighth lens 1180. Additionally, the optical imaging system 1100 may further include a diaphragm ST disposed between the object side surface and the image side surface of the first lens 1110. Furthermore, the optical imaging system 1100 may also include a spacer disposed between the second lens 1120 and the third lens 1130.

[0288] The first lens 1110 may have a positive refractive power. The object side surface of the first lens 1110 may have a convex shape in the paraxial region, and the image side surface of the first lens 1110 may have a concave shape in the paraxial region. The first lens 1110 may be formed of a plastic material. Additionally, the first lens 1110 may be an aspherical lens. For example, the first lens 1110 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0289] The second lens 1120 may have a negative refractive power. The object side surface of the second lens 1120 may have a convex shape in the paraxial region, and the image side surface of the second lens 1120 may have a concave shape in the paraxial region. The second lens 1120 may be formed of a plastic material. For example, the second lens 1120 may be formed of a plastic material having optical properties different from those of the first lens 1110 (e.g., different refractive indices and Abbe numbers). Additionally, the second lens 1120 may be an aspherical lens. For example, the second lens 1120 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0290] The third lens 1130 may have a negative refractive power. The object side surface of the third lens 1130 may have a convex shape in the paraxial region, and the image side surface of the third lens 1130 may have a concave shape in the paraxial region. The third lens 1130 may be formed of a plastic material. For example, the third lens 1130 may be formed of a plastic material having the same optical properties as those of the second lens 1120 (e.g., the same refractive index and Abbe number). Additionally, the third lens 1130 may be an aspherical lens. For example, the third lens 1130 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0291] The fourth lens 1140 may have a positive refractive power. The object side of the fourth lens 1140 may have a concave shape in the paraxial region, and the image side of the fourth lens 1140 may have a convex shape in the paraxial region. The fourth lens 1140 may be formed of a plastic material. For example, the fourth lens 1140 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 1130. At the same time, the fourth lens 1140 may be formed of a plastic material having optical properties (e.g., the same refractive index and Abbe number) the same as those of the first lens 1110. Additionally, the fourth lens 1140 may be an aspherical lens. For example, the fourth lens 1140 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0292] The fifth lens 1150 may have a negative refractive power. The object side of the fifth lens 1150 may have a convex shape in the paraxial region, and the image side of the fifth lens 1150 may have a concave shape in the paraxial region. The fifth lens 1150 may be formed of a plastic material. For example, the fifth lens 1150 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 1140. Additionally, the fifth lens 1150 may be an aspherical lens. For example, the fifth lens 1150 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0293] The sixth lens 1160 may have a positive refractive power. The object side of the sixth lens 1160 may have a convex shape in the paraxial region, and the image side of the sixth lens 1160 may have a concave shape in the paraxial region. The sixth lens 1160 may be formed of a plastic material. For example, the sixth lens 1160 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 1150. Additionally, the sixth lens 1160 may be an aspherical lens. For example, the sixth lens 1160 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0294] The seventh lens 1170 may have a positive refractive power. Both the object side and the image side of the seventh lens 1170 may have a convex shape in the paraxial region. The seventh lens 1170 may be formed of a plastic material. For example, the seventh lens 1170 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 1160. Additionally, the seventh lens 1170 may be an aspherical lens. For example, the seventh lens 1170 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0295] The eighth lens 1180 may have a negative refractive power. The object side surface of the eighth lens 1180 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 1180 may have a concave shape in the paraxial region. The eighth lens 1180 may be formed of a plastic material. For example, the eighth lens 1180 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 1170. Additionally, the eighth lens 1180 may be an aspherical lens. For example, the eighth lens 1180 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0296] Table 21 below shows the optical parameters and physical parameters of the optical imaging system 1100 according to the eleventh embodiment of the present disclosure.

[0297] Table 21

[0298]

[0299]

[0300] Table 22 below shows the aspherical data of the optical imaging system 1100 according to the eleventh embodiment of the present disclosure.

[0301] Table 22

[0302]

[0303]

[0304] Twelfth Embodiment

[0305] Figure 12A is a configuration diagram of an optical imaging system according to the twelfth embodiment of the present disclosure. Figure 12B is a graph showing the aberration characteristics of the optical imaging system according to the twelfth embodiment of the present disclosure.

[0306] According to the twelfth embodiment, the optical imaging system 1200 may include a first lens 1210, a second lens 1220, a third lens 1230, a fourth lens 1240, a fifth lens 1250, a sixth lens 1260, a seventh lens 1270, and an eighth lens 1280 arranged in order from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., an imaging surface IP) disposed on the image side of the eighth lens 1280. Additionally, the optical imaging system 1200 may further include a diaphragm ST disposed between the object side surface and the image side surface of the first lens 1210. Furthermore, the optical imaging system 1200 may further include a spacer disposed between the second lens 1220 and the third lens 1230.

[0307] The first lens 1210 may have a positive refractive power. The object side surface of the first lens 1210 may have a convex shape in the paraxial region, and the image side surface of the first lens 1210 may have a concave shape in the paraxial region. The first lens 1210 may be formed of a plastic material. Additionally, the first lens 1210 may be an aspherical lens. For example, the first lens 1210 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0308] The second lens 1220 may have a negative refractive power. The object side surface of the second lens 1220 may have a convex shape in the paraxial region, and the image side surface of the second lens 1220 may have a concave shape in the paraxial region. The second lens 1220 may be formed of a plastic material. For example, the second lens 1220 may be formed of a plastic material having optical properties different from those of the first lens 1210 (e.g., different refractive indices and Abbe numbers). Additionally, the second lens 1220 may be an aspherical lens. For example, the second lens 1220 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0309] The third lens 1230 may have a negative refractive power. The object side surface of the third lens 1230 may have a convex shape in the paraxial region, and the image side surface of the third lens 1230 may have a concave shape in the paraxial region. The third lens 1230 may be formed of a plastic material. For example, the third lens 1230 may be formed of a plastic material having the same optical properties as those of the second lens 1220 (e.g., the same refractive indices and Abbe numbers). Additionally, the third lens 1230 may be an aspherical lens. For example, the third lens 1230 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0310] The fourth lens 1240 may have a positive refractive power. The object side surface of the fourth lens 1240 may have a concave shape in the paraxial region, and the image side surface of the fourth lens 1240 may have a convex shape in the paraxial region. The fourth lens 1240 may be formed of a plastic material. For example, the fourth lens 1240 may be formed of a plastic material having optical properties different from those of the third lens 1230 (e.g., different refractive indices and Abbe numbers). At the same time, the fourth lens 1240 may be formed of a plastic material having the same optical properties as those of the first lens 1210 (e.g., the same refractive indices and Abbe numbers). Additionally, the fourth lens 1240 may be an aspherical lens. For example, the fourth lens 1240 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0311] The fifth lens 1250 may have a negative refractive power. The object side surface of the fifth lens 1250 may have a convex shape in the paraxial region, and the image side surface of the fifth lens 1250 may have a concave shape in the paraxial region. The fifth lens 1250 may be formed of a plastic material. For example, the fifth lens 1250 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 1240. Additionally, the fifth lens 1250 may be an aspherical lens. For example, the fifth lens 1250 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0312] The sixth lens 1260 may have a positive refractive power. The object side surface of the sixth lens 1260 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 1260 may have a concave shape in the paraxial region. The sixth lens 1260 may be formed of a plastic material. For example, the sixth lens 1260 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 1250. Additionally, the sixth lens 1260 may be an aspherical lens. For example, the sixth lens 1260 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0313] The seventh lens 1270 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 1270 may have a convex shape in the paraxial region. The seventh lens 1270 may be formed of a plastic material. For example, the seventh lens 1270 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 1260. Additionally, the seventh lens 1270 may be an aspherical lens. For example, the seventh lens 1270 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0314] The eighth lens 1280 may have a negative refractive power. The object side surface of the eighth lens 1280 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 1280 may have a concave shape in the paraxial region. The eighth lens 1280 may be formed of a plastic material. For example, the eighth lens 1280 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 1270. Additionally, the eighth lens 1280 may be an aspherical lens. For example, the eighth lens 1280 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0315] Table 23 below shows the optical parameters and physical parameters of the optical imaging system 1200 according to the twelfth embodiment of the present disclosure.

[0316] Table 23

[0317]

[0318]

[0319] Table 24 below shows the aspherical data of the optical imaging system 1200 according to the twelfth embodiment of the present disclosure.

[0320] Table 24

[0321]

[0322]

[0323] Thirteenth Embodiment

[0324] Figure 13A is a configuration diagram of an optical imaging system according to the thirteenth embodiment of the present disclosure. Figure 13B is a graph showing the aberration characteristics of the optical imaging system according to the thirteenth embodiment of the present disclosure.

[0325] According to the thirteenth embodiment, the optical imaging system 1300 may include a first lens 1310, a second lens 1320, a third lens 1330, a fourth lens 1340, a fifth lens 1350, a sixth lens 1360, a seventh lens 1370, and an eighth lens 1380 arranged in order from the object side, and may further include an infrared blocking filter F and an image sensor (i.e., imaging surface IP) disposed on the image side of the eighth lens 1380. In addition, the optical imaging system 1300 may further include an aperture ST disposed between the object side surface and the image side surface of the first lens 1310. Furthermore, the optical imaging system 1300 may further include a spacer between the second lens 1320 and the third lens 1330.

[0326] The first lens 1310 may have a positive refractive power. The object side surface of the first lens 1310 may have a convex shape in the paraxial region, and the image side surface of the first lens 1310 may have a concave shape in the paraxial region. The first lens 1310 may be formed of a plastic material. In addition, the first lens 1310 may be an aspherical lens. For example, the first lens 1310 may be a double-sided aspherical lens whose object side surface and image side surface are both aspherical.

[0327] The second lens 1320 may have a negative refractive power. The object side of the second lens 1320 may have a convex shape in the paraxial region, and the image side of the second lens 1320 may have a concave shape in the paraxial region. The second lens 1320 may be formed of a plastic material. For example, the second lens 1320 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the first lens 1310. Additionally, the second lens 1320 may be an aspherical lens. For example, the second lens 1320 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0328] The third lens 1330 may have a negative refractive power. The object side of the third lens 1330 may have a convex shape in the paraxial region, and the image side of the third lens 1330 may have a concave shape in the paraxial region. The third lens 1330 may be formed of a plastic material. For example, the third lens 1330 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the second lens 1320. Additionally, the third lens 1330 may be an aspherical lens. For example, the third lens 1330 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0329] The fourth lens 1340 may have a positive refractive power. The object side of the fourth lens 1340 may have a concave shape in the paraxial region, and the image side of the fourth lens 1340 may have a convex shape in the paraxial region. The fourth lens 1340 may be formed of a plastic material. For example, the fourth lens 1340 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the third lens 1330. At the same time, the fourth lens 1340 may be formed of a plastic material having the same optical properties (e.g., the same refractive index and Abbe number) as those of the first lens 1310. Additionally, the fourth lens 1340 may be an aspherical lens. For example, the fourth lens 1340 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0330] The fifth lens 1350 may have a negative refractive power. The object side of the fifth lens 1350 may have a convex shape in the paraxial region, and the image side of the fifth lens 1350 may have a concave shape in the paraxial region. The fifth lens 1350 may be formed of a plastic material. For example, the fifth lens 1350 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fourth lens 1340. Additionally, the fifth lens 1350 may be an aspherical lens. For example, the fifth lens 1350 may be a double-sided aspherical lens whose object side and image side are both aspherical.

[0331] The sixth lens 1360 may have a positive refractive power. The object side surface of the sixth lens 1360 may have a convex shape in the paraxial region, and the image side surface of the sixth lens 1360 may have a concave shape in the paraxial region. The sixth lens 1360 may be formed of a plastic material. For example, the sixth lens 1360 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the fifth lens 1350. Additionally, the sixth lens 1360 may be an aspherical lens. For example, the sixth lens 1360 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0332] The seventh lens 1370 may have a positive refractive power. Both the object side surface and the image side surface of the seventh lens 1370 may have a convex shape in the paraxial region. The seventh lens 1370 may be formed of a plastic material. For example, the seventh lens 1370 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the sixth lens 1360. Additionally, the seventh lens 1370 may be an aspherical lens. For example, the seventh lens 1370 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0333] The eighth lens 1380 may have a negative refractive power. The object side surface of the eighth lens 1380 may have a convex shape in the paraxial region, and the image side surface of the eighth lens 1380 may have a concave shape in the paraxial region. The eighth lens 1380 may be formed of a plastic material. For example, the eighth lens 1380 may be formed of a plastic material having optical properties (e.g., different refractive indices and Abbe numbers) different from those of the seventh lens 1370. Additionally, the eighth lens 1380 may be an aspherical lens. For example, the eighth lens 1380 may be a double-sided aspherical lens in which both its object side surface and image side surface are aspherical.

[0334] Table 25 below shows the optical parameters and physical parameters of the optical imaging system 1300 according to the thirteenth embodiment of the present disclosure.

[0335] Table 25

[0336] Surface Radius of Curvature Thickness / Distance Refractive Index Abbe Number Object Infinity Infinity 1 Infinity -1.050 2 3.282 1.311 1.544 56.0 3 34.683 0.050 4 11.248 0.280 1.671 19.4 5 5.574 0.552 6 Infinity 0.000 7 9.921 0.230 1.671 19.4 8 9.432 0.264 9 -28.902 0.694 1.544 56.0 10 -9.247 0.050 11 11.953 0.250 1.651 21.5 12 7.005 0.427 13 16.696 0.687 1.567 37.4 14 18.682 0.431 15 3.961 1.020 1.544 56.0 16 -14.714 0.674 17 15.625 0.480 1.535 55.7 18 2.070 0.448 19 Infinity 0.210 1.517 64.2 20 Infinity 0.618 Imaging Plane Infinity

[0337] Table 26 below shows the aspherical data of the optical imaging system 1300 according to the thirteenth embodiment of the present disclosure.

[0338] Table 26

[0339]

[0340]

[0341] Table 27 below shows the optical parameters, physical parameters, and conditional expressions related to the focal length of the optical imaging system according to an embodiment of the present disclosure.

[0342] Table 27:

[0343]

[0344]

[0345]

[0346] The optical imaging system according to the above exemplary embodiment of the present disclosure can be manufactured to be thinner than the size of the image sensor.

[0347] One aspect of the present disclosure is to provide an optical imaging system having a total track length shorter than the size of the image sensor. At the same time, an object of the present disclosure is to provide a bright optical imaging system.

[0348] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail can 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 the purpose of limitation. The description of the features or aspects in each example should be considered applicable to similar features or aspects in other examples. Appropriate results can still be achieved if the described techniques are performed in a different order, and / or if the components in the described system, architecture, device, or circuit are combined in a different way and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not limited by the specific embodiments, but is defined 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, a second lens, a third lens, a fourth lens having a convex image side surface, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the imaging surface; wherein, {TTL / (2×IMG HT)}×Fno < 1.000 is satisfied; wherein, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, IMG HT is half of the diagonal length of the imaging surface, and Fno is the F-number of the optical imaging system; and wherein, the optical imaging system has a total of eight lenses.

2. The optical imaging system according to claim 1, Among them, The third lens has a positive refractive power.

3. The optical imaging system according to claim 1, Among them, The sixth lens has a positive refractive power.

4. The optical imaging system according to claim 1, Among them, 0 < v1-(v6+v7) / 2 < 30.00 is satisfied, wherein, v1 is the Abbe number of the first lens, v6 is the Abbe number of the sixth lens, and v7 is the Abbe number of the seventh lens.

5. The optical imaging system according to claim 1, Among them, 0 < f7 / f < 2.000 is satisfied, wherein, f is the focal length of the optical imaging system, and f7 is the focal length of the seventh lens.

6. The optical imaging system according to claim 1, Among them, -1.000 < f8 / f < 0 is satisfied, wherein, f is the focal length of the optical imaging system, and f8 is the focal length of the eighth lens.

7. The optical imaging system according to claim 1, Among them, The third lens has a negative refractive power.

8. The optical imaging system according to claim 1, Among them, The Abbe number of the first lens and the Abbe number of the fourth lens are the same as each other.

9. The optical imaging system according to claim 1, Among them, Both the object side surface and the image side surface of the seventh lens have a convex shape.

10. An optical imaging system, comprising: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the imaging surface; wherein, 0.500 ≤ TTL / (2×IMG HT) < 0.750 and 1.000 < Fno < 1.600 are satisfied; wherein, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, IMG HT is half of the diagonal length of the imaging surface, and Fno is the F-number of the optical imaging system; and wherein, the optical imaging system has a total of eight lenses.

11. The optical imaging system according to claim 10, Among them, The Abbe number of the second lens and the Abbe number of the third lens are the same as each other.

12. The optical imaging system according to claim 10, Among them, The seventh lens has a positive refractive power and a convex image side surface.

13. The optical imaging system according to claim 10, Among them, The third lens has a negative refractive power, and the sixth lens has a positive refractive power.

14. The optical imaging system according to claim 10, Among them, 1.100 ≤ TTL / f ≤ 1.400 is satisfied. where f is the focal length of the optical imaging system.

15. The optical imaging system according to claim 10, Among them, the Abbe number of the first lens and the Abbe number of the fourth lens are the same as each other.

16. The optical imaging system according to claim 10, Among them, satisfying {TTL / (2×IMG HT)}×Fno < 1.000.

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