Optical image capturing system

Abstract

The optical image capturing system includes, in order from an object side, a first lens having refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens and the second lens are bonded together, wherein 0 < = f1 / v1-f2 / v2lt is satisfied; f1 is the focal length of the first lens, v1 is the Abbe number of the first lens, f2 is the focal length of the second lens, and v2 is the Abbe number of the second lens.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0149375, filed on October 29, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] This disclosure relates to optical imaging systems. Background Technology

[0004] Portable terminals can be equipped with cameras that have high resolution and include an optical imaging system that includes multiple lenses to enable video calling and image capture.

[0005] To achieve clearer image quality, image sensors with high pixel counts (e.g., 13 to 200 million pixels) can be used in cameras for portable devices.

[0006] In addition, as portable devices become smaller, thinner cameras may be needed for them.

[0007] The above information is presented as background information and is intended to aid in understanding this disclosure. No determination or assertion is made as to whether any of the above content can be used as prior art with respect to this disclosure. Utility Model Content

[0008] This summary portion is provided to briefly introduce the selection of concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0009] In one general aspect, the optical imaging system includes, sequentially arranged from the object side, a first lens with refractive power, a second lens with positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first and second lenses are bonded together, wherein 0 ≤ |f1 / v1 - f2 / v2| < 3, where f1 is the focal length of the first lens, v1 is the Abbe number of the first lens, f2 is the focal length of the second lens, and v2 is the Abbe number of the second lens.

[0010] The Abbe number of the first lens can be less than the Abbe number of the second lens.

[0011] The refractive index of the first lens can be higher than that of the second lens.

[0012] The third lens may have a convex object side and a concave image side.

[0013] The fourth lens may have a convex object side, and the sixth lens may have a concave image side.

[0014] The seventh lens may have a positive refractive power and a convex object side.

[0015] The eighth lens may have a negative refractive power and a convex object side.

[0016] The optical imaging system may satisfy 1 < TTL / f < 1.3, where f is the total focal length of the optical imaging system, and TTL is the distance on the optical axis from the object side of the first lens to the imaging surface.

[0017] The optical imaging system may satisfy 0.5 < TTL / (2×IMG HT) < 0.8, where IMG HT is half of the diagonal length of the imaging surface, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface.

[0018] 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 sequentially arranged from the object side, where the first lens and the second lens are bonded together, and where either or both of v1 - v2 < 0 and 0 < n1 - n2 are satisfied, where v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, n1 is the refractive index of the first lens, and n2 is the refractive index of the second lens.

[0019] The optical imaging system may satisfy 0 < f2 / f < 2, where f is the total focal length of the optical imaging system, and f2 is the focal length of the second lens.

[0020] The optical imaging system may satisfy -5 < f3 / f < -1, where f is the total focal length of the optical imaging system, and f3 is the focal length of the third lens.

[0021] The optical imaging system may satisfy -10 < f4 / f / 100 < 1, where f is the total focal length of the optical imaging system, and f4 is the focal length of the fourth lens.

[0022] The optical imaging system may satisfy -5 < f5 / f / 100 < 1, where f is the total focal length of the optical imaging system, and f5 is the focal length of the fifth lens.

[0023] The optical imaging system may satisfy 0 < f7 / f < 2, where f is the total focal length of the optical imaging system, and f7 is the focal length of the seventh lens.

[0024] The optical imaging system can satisfy -2 < f8 / f < 0, where f is the total focal length of the optical imaging system, and f8 is the focal length of the eighth lens.

[0025] Other features and aspects will be apparent in light of 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 shows Figure 1A the aberration characteristics of the optical imaging system shown in

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

[0029] Figure 2B shows Figure 2A [[ID=2皮5]]the aberration characteristics of the optical imaging system shown in

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

[0031] ]> Figure 3B shows Figure 3A the aberration characteristics of the optical imaging system shown in

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

[0033] Figure 4B shows Figure 4A the aberration characteristics of the optical imaging system shown in

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

[0035] Figure 5B shows Figure 5A the aberration characteristics of the optical imaging system shown in

[0036] 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 elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0037] In the following description, although examples of this disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0038] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, except for operations that must occur in a specific order, as will become apparent upon understanding this disclosure. Furthermore, for clarity and brevity, descriptions of features well-known in the art may be omitted.

[0039] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways in which the methods, apparatuses, and / or systems described herein will become apparent upon understanding this disclosure.

[0040] Throughout this specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, the element may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly attached to" another element, there are no other elements between the element and the other element.

[0041] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items; similarly, “at least one” includes any one of the associated listed items and any combination of any two or more items.

[0042] 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 used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0043] Spatial relative terms such as “above,” “above,” “below,” and “under” may be used herein for descriptive convenience to describe the relationship of one element relative to another, as shown in the accompanying drawings. In addition to covering the orientation depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “under” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both orientations of “above” and “below”. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0044] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the terms “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate 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.

[0045] Due to manufacturing techniques and / or tolerances, the shapes shown in the accompanying drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that occur during manufacturing.

[0046] It should be noted that in this document, the term "may" is used relative to examples, such as regarding what an example may include or implement, meaning that there exists at least one example that includes or implements such a feature, but not all examples are limited to this.

[0047] The features of the examples described herein can be combined in various ways that will become apparent upon understanding this disclosure. Furthermore, although the examples described herein have multiple configurations, other configurations that will become apparent upon understanding this disclosure are also possible.

[0048] In this specification, the first lens refers to the lens closest to the object side, and the eighth lens refers to the lens closest to the imaging surface (or image sensor).

[0049] Furthermore, in this specification, the values ​​of the lens's radius of curvature, thickness, distance, focal length, etc., are all expressed in millimeters (mm), and the field of view (FOV) is measured in degrees.

[0050] Furthermore, in the description of lens shape, a configuration where one surface is convex indicates that the paraxial region (a very narrow region near the optical axis) of that surface is convex, and a configuration where one surface is concave indicates that the paraxial region of that surface is concave. Therefore, even if one surface of the lens is described as having a convex shape, the edge portion of the lens can be concave, and similarly, even if one surface of the lens is described as having a concave shape, the edge portion of the lens can be convex.

[0051] An optical imaging system according to an embodiment of the present disclosure may include eight lenses.

[0052] For example, an optical imaging system according to an embodiment of the present disclosure 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 sequentially from the object side.

[0053] However, the optical imaging system according to embodiments of this disclosure may not consist of only eight lenses, and may also include other components as needed. For example, the optical imaging system may also include an image sensor that converts incident light from an object into an electrical signal. Additionally, the optical imaging system may include an infrared blocking filter (hereinafter referred to as a "filter") that blocks light in the infrared region from incident on the image sensor. Furthermore, the optical imaging system may include an aperture for controlling the amount of light.

[0054] The first lens configured in the optical imaging system according to embodiments of the present disclosure may be a lens formed of a polymer material (a material different from the plastic materials described below) and may, for example, have adhesive properties. For example, the first lens may be a liquid UV polymer having the property of curing in response to UV light. Furthermore, the second to eighth lenses configured in the optical imaging system according to embodiments of the present disclosure may be lenses formed of a plastic material or a glass material. For example, the second lens may be a lens formed of a plastic material or a glass material, and the third to eighth lenses may be lenses formed of a plastic material.

[0055] Furthermore, at least one of the first to eighth lenses may have an aspherical surface. For example, each of the first to eighth lenses may have at least one aspherical surface. The aspherical surfaces of the first to eighth lenses are represented by Equation 1:

[0056] Equation 1:

[0057]

[0058] In Equation 1, c is the curvature of the lens (the reciprocal of the radius of curvature), K is the conic constant, and Y represents the distance from a point on the aspherical surface of the lens to the optical axis. In addition, the constants A to H, J, and L to P refer to the aspherical coefficients, and Z represents the distance in the optical axis direction between a point on the aspherical surface of the lens and the vertex of the aspherical surface.

[0059] The optical imaging system according to an embodiment of the present disclosure may satisfy any one or any two or more of the following conditional expressions:

[0060] Conditional Expression 1: 0 ≤ |f1 / v1 - f2 / v2| < 3;

[0061] Conditional Expression 2: v1 - v2 < 0;

[0062] Conditional Expression 3: 0 < n1 - n2;

[0063] Conditional Expression 4: -2 < f1 / f / 10 < 2;

[0064] Conditional Expression 5: 0 < f2 / f < 2;

[0065] Conditional Expression 6: -5 < f3 / f < -1;

[0066] Conditional Expression 7: -10 < f4 / f / 100 < 1;

[0067] Conditional Expression 8: -5 < f5 / f / 100 < 1;

[0068] Conditional Expression 9: -8 < f6 / f < 8;

[0069] Conditional Expression 10: 0 < f7 / f < 2;

[0070] Conditional Expression 11: -2 < f8 / f < 0;

[0071] Conditional Expression 12: 0.5 < TTL / (2 × IMG HT) < 0.8;

[0072] Conditional Expression 13: 1 < f / EPD < 3;

[0073] Conditional Expression 14: 1 < TTL / f < 1.3; and

[0074] Conditional Expression 15: 0.1 < BFL / f < 0.3.

[0075] In the conditional expression, f is the total focal length of the optical imaging system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, and f8 is the focal length of the eighth lens.

[0076] In addition, v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, n1 is the refractive index of the first lens, and n2 is the refractive index of the second lens.

[0077] Additionally, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, BFL is the distance from the image side of the eighth lens to the imaging plane on the optical axis, IMG HT is half the diagonal length of the imaging plane, and EPD is the diameter of the entrance pupil.

[0078] The first and second lenses configured in the optical imaging system according to embodiments of the present disclosure can be bonded lenses, for example, the first and second lenses can be bonded together. The first and second lenses can be lenses formed of different materials. For example, the first lens can be a lens formed of a polymer material (a material different from the plastic material described below), and the second lens can be a lens formed of a plastic material or a glass material. Furthermore, the first lens can be formed of an adhesive material, and therefore can be directly attached to the object side of the second lens without the use of additional adhesive.

[0079] Figure 1A This is a configuration diagram of an optical imaging system according to a first embodiment of the present disclosure, and Figure 1B It is shown Figure 1A The diagram shows the aberration characteristics of the optical imaging system.

[0080] An optical imaging system 100 according to a first embodiment of the present disclosure 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 sequentially from the object side, as well as an image sensor IS, the image sensor IS having a filter F and an imaging surface IP on which a focal point is formed.

[0081] According to the first embodiment of the present disclosure, the optical imaging system 100 has a total focal length f of 6.06 mm, an IMG HT of 6.00 mm, and a FOV of 87.8°.

[0082] The characteristics of each lens in the optical imaging system 100 configured according to the first embodiment of the present disclosure are shown in Table 1.

[0083] Table 1

[0084] Face number part radius of curvature Thickness / Distance Refractive index Abbe number focal length S1 First lens 3.0017 0.1000 1.651 39.25 -85.89 S2 Second lens 2.8120 0.7022 1.617 60.47 4.94 S3 31.2733 0.1015 S4 Third lens 48.5674 0.2620 1.679 31.53 -9.26 S5 5.5887 0.2825 S6 Fourth lens 10.9567 0.4762 1.591 61.93 10.61 S7 -14.5721 0.7849 S8 Fifth lens -9.3580 0.3472 1.681 31.81 30.35 S9 -6.5541 0.1884 S10 Sixth lens -19.1739 0.5464 1.635 23.96 -6.03 S11 4.8992 0.3134 S12 Seventh Lens 3.4961 1.1723 1.567 37.40 5.60 S13 -32.7086 0.8036 S14 Eighth lens 48.6290 0.5355 1.535 55.74 -5.59 S15 2.8167 0.2799 S16 Filter infinity 0.1540 1.517 64.20 S17 infinity 0.4451 S18 Imaging surface infinity

[0085] According to a first embodiment of this disclosure, the first lens 110 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The second lens 120 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The third lens 130 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The fourth lens 140 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The fifth lens 150 may have positive refractive power, its object-side surface may be concave, and its image-side surface may be convex. The sixth lens 160 may have negative refractive power, and both its object-side surface and image-side surface may be concave. The seventh lens 170 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The eighth lens 180 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave.

[0086] According to a first embodiment of this disclosure, the first lens 110 may be a lens formed of a polymer material, and the second lens 120 to the eighth lens 180 may be lenses formed of a plastic material. For example, the second lens 120 to the eighth lens 180 may be configured as lenses formed of plastic materials with different optical properties.

[0087] Meanwhile, the aspherical coefficients of each lens in the optical imaging system 100 configured according to the first embodiment of the present disclosure are shown in Table 2. According to the first embodiment of the present disclosure, the first lens 110 to the eighth lens 180 may have aspherical surfaces on two surfaces (object side and image side).

[0088] Table 2

[0089]

[0090]

[0091]

[0092] Figure 2A This is a configuration diagram of an optical imaging system according to a second embodiment of the present disclosure, and Figure 2B It is shown Figure 2A The diagram shows the aberration characteristics of the optical imaging system.

[0093] An optical imaging system 200 according to a second embodiment of the present disclosure 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 sequentially from the object side, as well as an image sensor IS, the image sensor IS having a filter F and an imaging surface IP on which a focal point is formed.

[0094] According to the second embodiment of the present disclosure, the optical imaging system 200 has a total focal length f of 6.41 mm, an IMG HT of 6.00 mm, and a FOV of 85.0°.

[0095] The characteristics of each lens in the optical imaging system 200 configured according to the second embodiment of the present disclosure are shown in Table 3.

[0096] Table 3

[0097]

[0098]

[0099] According to a second embodiment of this disclosure, the first lens 210 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The second lens 220 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The third lens 230 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The fourth lens 240 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The fifth lens 250 may have negative refractive power, and both its object-side surface and image-side surface may be concave. The sixth lens 260 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The seventh lens 270 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The eighth lens 280 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave.

[0100] According to a second embodiment of this disclosure, the first lens 210 may be a lens formed of a polymer material, and the second lens 220 to the eighth lens 280 may be lenses formed of a plastic material. For example, the second lens 220 to the eighth lens 280 may each be configured as a lens formed of a plastic material having optical properties different from those of adjacent lenses.

[0101] Meanwhile, the aspherical coefficients of each lens in the optical imaging system 200 configured according to the second embodiment of the present disclosure are shown in Table 4. According to the second embodiment of the present disclosure, the first lens 210 to the eighth lens 280 may have aspherical surfaces on two surfaces (object side and image side).

[0102] Table 4

[0103]

[0104]

[0105]

[0106] Figure 3A This is a configuration diagram of an optical imaging system according to a third embodiment of the present disclosure, and Figure 3B It is shown Figure 3A The diagram shows the aberration characteristics of the optical imaging system.

[0107] An optical imaging system 300 according to a third embodiment of the present disclosure 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 sequentially from the object side, as well as an image sensor IS, the image sensor IS having a filter F and an imaging surface IP on which a focal point is formed.

[0108] According to the third embodiment of the present disclosure, the optical imaging system 300 has a total focal length f of 6.44 mm, an IMG HT of 6.00 mm, and a FOV of 84.8°.

[0109] The characteristics of each lens in the optical imaging system 300 configured according to the third embodiment of this disclosure are shown in Table 5.

[0110] Table 5

[0111]

[0112]

[0113] According to a third embodiment of this disclosure, the first lens 310 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The second lens 320 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The third lens 330 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The fourth lens 340 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The fifth lens 350 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The sixth lens 360 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The seventh lens 370 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The eighth lens 380 may have negative refractive power, and both its object-side surface and image-side surface may be concave.

[0114] According to a third embodiment of this disclosure, the first lens 310 may be a lens formed of a polymer material, and the second lens 320 to the eighth lens 380 may be lenses formed of a plastic material. For example, the second lens 320 to the eighth lens 380 may each be configured as a lens formed of a plastic material having optical properties different from at least a portion of the optical properties of the other lenses.

[0115] Meanwhile, the aspherical coefficients of each lens in the optical imaging system 300 configured according to the third embodiment of the present disclosure are shown in Table 6. According to the third embodiment of the present disclosure, the first lens 310 to the eighth lens 380 may have aspherical surfaces on two surfaces (object side and image side).

[0116] Table 6

[0117]

[0118]

[0119]

[0120] Figure 4A This is a configuration diagram of an optical imaging system according to the fourth embodiment of this disclosure, and Figure 4B It is shown Figure 4A The diagram shows the aberration characteristics of the optical imaging system.

[0121] An optical imaging system 400 according to a fourth embodiment of the present disclosure 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 sequentially from the object side, as well as an image sensor IS, the image sensor IS having a filter F and an imaging surface IP on which a focal point is formed.

[0122] According to the fourth embodiment of the present disclosure, the optical imaging system 400 has a total focal length f of 6.72 mm, an IMG HT of 6.00 mm, and a FOV of 82.8°.

[0123] The characteristics of each lens in the optical imaging system 400 configured according to the fourth embodiment of the present disclosure are shown in Table 7.

[0124] Table 7

[0125] Face number part radius of curvature Thickness / Distance Refractive index Abbe number focal length S1 First lens 2.3631 0.1000 1.650 33.60 -25.43 S2 Second lens 2.0347 0.8327 1.544 55.99 4.55 S3 9.6384 0.1070 S4 Third lens 9.6236 0.2676 1.671 19.24 -18.77 S5 5.4210 0.4018 S6 Fourth lens 24.5138 0.3848 1.544 55.99 -5861.43 S7 24.1927 0.3285 S8 Fifth lens 49.8609 0.3078 1.671 19.24 -2499.91 S9 48.3169 0.4075 S10 Sixth lens 108.8448 0.2866 1.614 25.94 -47.83 S11 23.2808 0.5050 S12 Seventh Lens 4.2770 0.7086 1.567 37.40 9.79 S13 17.1147 0.7167 S14 Eighth lens 7.4041 0.6129 1.535 55.74 -6.58 S15 2.3221 0.2202 S16 Filter infinity 0.1178 1.517 64.20 S17 infinity 1.1226 S18 Imaging surface infinity

[0126] According to the fourth embodiment of this disclosure, the first lens 410 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave. The second lens 420 may have positive refractive power, the object-side surface may be convex, and the image-side surface may be concave. The third lens 430 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave. The fourth lens 440 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave. The fifth lens 450 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave. The sixth lens 460 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave. The seventh lens 470 may have positive refractive power, the object-side surface may be convex, and the image-side surface may be concave. The eighth lens 480 may have negative refractive power, the object-side surface may be convex, and the image-side surface may be concave.

[0127] According to a fourth embodiment of this disclosure, the first lens 410 may be a lens formed of a polymer material, and the second lens 420 to the eighth lens 480 may be lenses formed of a plastic material. For example, the second lens 420 to the eighth lens 480 may each be configured as a lens formed of a plastic material having optical properties different from those of at least adjacent lenses.

[0128] Meanwhile, the aspherical coefficients of each lens in the optical imaging system 400 configured according to the fourth embodiment of the present disclosure are shown in Table 8. According to the fourth embodiment of the present disclosure, the first lens 410 to the eighth lens 480 may have aspherical surfaces on two surfaces (object side and image side).

[0129] Table 8

[0130]

[0131]

[0132]

[0133] Figure 5A This is a configuration diagram of an optical imaging system according to the fifth embodiment of this disclosure, and Figure 5B It is shown Figure 5A The diagram shows the aberration characteristics of the optical imaging system.

[0134] An optical imaging system 500 according to a fifth embodiment of the present disclosure 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 sequentially from the object side, as well as an image sensor IS, the image sensor IS having a filter F and an imaging surface IP on which a focal point is formed.

[0135] According to the fifth embodiment of the present disclosure, the optical imaging system 500 has a total focal length f of 6.15 mm, an IMG HT of 6.00 mm, and a FOV of 86.8°.

[0136] The characteristics of each lens in the optical imaging system 500 configured according to the fifth embodiment of this disclosure are shown in Table 9.

[0137] Table 9

[0138]

[0139] According to a fifth embodiment of this disclosure, the first lens 510 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The second lens 520 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The third lens 530 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave. The fourth lens 540 may have positive refractive power, and both its object-side surface and image-side surface may be convex. The fifth lens 550 may have positive refractive power, its object-side surface may be concave, and its image-side surface may be convex. The sixth lens 560 may have negative refractive power, and both its object-side surface and image-side surface may be concave. The seventh lens 570 may have positive refractive power, its object-side surface may be convex, and its image-side surface may be concave. The eighth lens 580 may have negative refractive power, its object-side surface may be convex, and its image-side surface may be concave.

[0140] According to a fifth embodiment of this disclosure, the first lens 510 may be a lens formed of a polymer material, the second lens 520 may be a lens formed of a glass material, and the third lens 530 to the eighth lens 580 may be lenses formed of a plastic material. For example, the third lens 530 to the eighth lens 580 may be configured as lenses formed of plastic materials with different optical properties.

[0141] Meanwhile, the aspherical coefficients of each lens configured in the optical imaging system 500 according to the fifth embodiment of the present disclosure are shown in Table 10. According to the fifth embodiment of the present disclosure, the first lens 510 to the eighth lens 580 may have aspherical surfaces on two surfaces (object side and image side).

[0142] Table 10

[0143]

[0144]

[0145]

[0146] Table 11 shows the conditional expression values ​​for an optical imaging system according to an embodiment of the present disclosure.

[0147] Table 11

[0148]

[0149] In one or more embodiments, an optical imaging system can achieve high resolution while having a small overall length.

[0150] In one or more embodiments, high resolution can be achieved while reducing size. Furthermore, chromatic aberration can be improved.

[0151] While specific examples have been shown and described above, it will be apparent upon understanding this disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. An optical imaging system, characterized in that, The optical imaging system includes: A first lens with refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side. Wherein, the first lens and the second lens are bonded together, and Wherein, 0 ≤ |f1 / v1 - f2 / v2| < 3 is satisfied, Wherein, f1 is the focal length of the first lens, v1 is the Abbe number of the first lens, f2 is the focal length of the second lens, and v2 is the Abbe number of the second lens.

2. The optical imaging system according to claim 1, characterized in that, The Abbe number of the first lens is less than the Abbe number of the second lens.

3. The optical imaging system according to claim 1, characterized in that, The refractive index of the first lens is higher than the refractive index of the second lens.

4. The optical imaging system according to claim 1, characterized in that, The third lens has a convex object side and a concave image side.

5. The optical imaging system according to claim 1, characterized in that, The fourth lens has a convex object side, and the sixth lens has a concave image side.

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

7. The optical imaging system according to claim 1, characterized in that, The eighth lens has negative refractive power and a convex object side.

8. The optical imaging system according to claim 1, characterized in that, 1 < TTL / f < 1.3 is satisfied, Wherein, f is the total focal length of the optical imaging system, and TTL is the distance on the optical axis from the object side of the first lens to the imaging surface.

9. The optical imaging system according to claim 1, characterized in that, 0.5 < TTL / (2 × IMG HT) < 0.8 is satisfied, Wherein, IMG HT is half of the diagonal length of the imaging surface, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface.

10. An optical imaging system, characterized in that, 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. Wherein, the first lens and the second lens are bonded together, and Wherein, either or both of v1 - v2 < 0 and 0 < n1 - n2 are satisfied, Wherein, v1 is the Abbe number of the first lens, v2 is the Abbe number of the second lens, n1 is the refractive index of the first lens, and n2 is the refractive index of the second lens.

11. The optical imaging system according to claim 10, characterized in that, 0 < f2 / f < 2 is satisfied, Wherein, f is the total focal length of the optical imaging system, and f2 is the focal length of the second lens.

12. The optical imaging system according to claim 10, characterized in that, -5 < f3 / f < -1 is satisfied, Wherein, f is the total focal length of the optical imaging system, and f3 is the focal length of the third lens.

13. The optical imaging system according to claim 10, characterized in that, -10 < f4 / f / 100 < 1 is satisfied, Wherein, f is the total focal length of the optical imaging system, and f4 is the focal length of the fourth lens.

14. The optical imaging system according to claim 10, characterized in that, -5 < f5 / f / 100 < 1 is satisfied, Wherein, f is the total focal length of the optical imaging system, and f5 is the focal length of the fifth lens.

15. The optical imaging system according to claim 10, characterized in that, 0 < f7 / f < 2 is satisfied, wherein, f is the total focal length of the optical imaging system, and f7 is the focal length of the seventh lens.

16. The optical imaging system according to claim 10, characterized in that, -2 < f8 / f < 0 is satisfied, Wherein, f is the total focal length of the optical imaging system, and f8 is the focal length of the eighth lens.

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