Optical imaging system

Abstract

This invention provides an optical imaging system comprising: a first lens having refractive power; a second lens having refractive power and having a protruding object-side surface; a third lens having refractive power and having a protruding object-side surface; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having negative refractive power. The optical imaging system satisfies 100° ≤ FOV and -2.0 < {IMGHT / (f*tan(FOV / 2))-1}*100 < 2.0, where FOV is the field of view of the optical imaging system, IMGHT is half the diagonal length of the imaging plane, and f is the focal length of the optical imaging system.

Description

Technical Field

[0001] This disclosure relates to an optical imaging system with a wide field of view of 100 degrees or more.

[0002] Cross-reference of related applications This application claims priority to Korean Patent Application No. 10-2020-0120733, filed with the Korean Intellectual Property Office on September 18, 2020, the entire disclosure of which is incorporated herein by reference for all purposes. Prior Technology

[0003] Small cameras can be mounted on wireless terminal devices. For example, a small camera can be mounted on each of the front and rear surfaces of the wireless terminal device. Since such small cameras can be used for various purposes to obtain images of scenes, indoor portraits, and similar subjects, they are required to have a performance level similar to that of conventional cameras. However, achieving high performance with small cameras may be difficult due to limitations in installation space caused by the finite size of the wireless terminal device. Therefore, it is necessary to develop optical imaging systems that can improve the performance of small cameras without increasing their size.

[0004] The above information is presented as background information only to aid understanding of this disclosure. No determination or statement is made as to whether any of the above applies to prior art related to this disclosure. Summary of the Invention

[0005] This summary is provided to introduce, in a simplified form, the concept selection further described below in the embodiments. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope claimed by the subject matter.

[0006] In a general configuration, an optical imaging system includes: a first lens with refractive power; a second lens with refractive power and a convex object-side surface; a third lens with refractive power and a convex object-side surface; a fourth lens with refractive power; a fifth lens with refractive power; and a sixth lens with negative refractive power. The optical imaging system satisfies 100° ≤ FOV and -2.0 < {IMGHT / (f*tan(FOV / 2))-1}*100 < 2.0, where FOV is the field of view of the optical imaging system, IMGHT is half the diagonal length of the imaging plane, and f is the focal length of the optical imaging system.

[0007] The first lens may have a concave object-side surface or a concave image-side surface.

[0008] The fourth lens may have a concave object-side surface.

[0009] The fifth lens may have a protruding object-side surface or a protruding image-side surface.

[0010] The sixth lens may have a protruding side surface.

[0011] The sixth lens may have a concave image-side surface.

[0012] The optical imaging system can satisfy -1.5 < f3 / f4 < -0.7, where f3 is the focal length of the third lens and f4 is the focal length of the fourth lens.

[0013] The optical imaging system can satisfy 0.6 < |f4 / f6| < 1.8, where f4 is the focal length of the fourth lens and f6 is the focal length of the sixth lens.

[0014] The optical imaging system can satisfy 1.3 < TTL / IMGHT < 1.4, where TTL is the distance from the object-side surface of the first lens to the imaging plane.

[0015] The optical imaging system can meet the requirement of 1.8 < f number (aperture value) < 2.3.

[0016] In another generalized form, the optical imaging system includes: a first lens with refractive power; a second lens with refractive power and a protruding object-side surface; a third lens with refractive power and a protruding object-side surface; a fourth lens with refractive power; a fifth lens with refractive power; and a sixth lens with refractive power, wherein the first to sixth lenses are arranged in order from the object side, and wherein 100° ≤ FOV, -2.0 < {IMGHT / (f*tan(FOV / 2))-1}*100 < 2.0, and TTL / IMGHT < 1.4.

[0017] The first lens may have refractive power, the sign of which is different from that of the second lens.

[0018] The fourth lens may have refractive power, the sign of which is different from that of the fifth lens.

[0019] The sixth lens can have negative refractive power.

[0020] The optical imaging system can satisfy 1.0 < f1 / f3 < 3.0, where f1 is the focal length of the first lens.

[0021] The optical imaging system can satisfy 0.2 < f3 / f5 < 2.0, where f5 is the focal length of the fifth lens.

[0022] Other features and manners will become apparent from the following embodiments, drawings, and claims. Simple Explanation of the Diagram

[0023] Figure 1 is a diagram illustrating a first example of an optical imaging system. Figure 2 shows the aberration curves of the optical imaging system illustrated in Figure 1. Figure 3 is a diagram illustrating a second example of an optical imaging system. Figure 4 shows the aberration curves of the optical imaging system illustrated in Figure 3. Figure 5 is a diagram illustrating a third example of an optical imaging system. Figure 6 shows the aberration curves of the optical imaging system illustrated in Figure 5. Figure 7 is a diagram illustrating the fourth example of an optical imaging system. Figure 8 shows the aberration curves of the optical imaging system illustrated in Figure 7. Figure 9 is a diagram illustrating the fifth example of an optical imaging system. Figure 10 shows the aberration curves of the optical imaging system illustrated in Figure 9. Throughout the drawings and detailed descriptions, the same reference numbers refer to the same components. The drawings may not be drawn to scale, and for clarity, illustration, and convenience, the relative sizes, proportions, and descriptions of the components in the drawings may be exaggerated. Implementation

[0024] The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various variations, 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 examples presented herein; however, the order of operations may be altered, as will become apparent upon understanding this disclosure, except for operations that must occur in a certain order. Furthermore, for the purpose of enhancing clarity and conciseness, descriptions of features well-known in the art may be omitted.

[0025] The features described herein may be manifested in different forms and should not be construed as limited to the instances described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways of implementing the methods, apparatus, and / or systems described herein that will become apparent upon understanding this disclosure.

[0026] In this document, it should be noted that the use of the term "may" (e.g., with respect to what an instance or embodiment may include or implement) means that there exists at least one instance or embodiment that includes or implements this feature, but not all instances and embodiments are limited thereto.

[0027] Throughout this 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," "connected to," or "coupled to" the other element, or one or more other elements may be interposed therebetween. Conversely, when an element is described as being "directly above," "directly connected to," or "directly coupled to" another element, no other elements may be interposed therebetween.

[0028] As used herein, the term "and / or" includes any two or more of the associated listed items and any combination thereof.

[0029] Although terms such as "first," "second," and "third" may be used herein to describe various components, assemblies, areas, layers, or sections, these components, assemblies, areas, layers, or sections are not limited to these terms. In fact, these terms are used only to distinguish one component, assembly, area, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, area, layer, or section referred to in the examples described herein may also be referred to as the second component, assembly, area, layer, or section.

[0030] For ease of description, spatial relative terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another illustrated in the figures. In addition to the orientation depicted in the figures, the spatial relative terms are also intended to cover different orientations of the device during use or operation. For example, if the device in the figure is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both upper and lower orientations. Devices may also be oriented in other ways (e.g., rotated 90 degrees or otherwise), and therefore the spatial relative terms used herein will be interpreted accordingly.

[0031] The terminology used herein is for the purpose of describing various instances only and is not intended to limit this disclosure. Unless the context otherwise clearly indicates otherwise, the articles "a / an" and "the" are intended to include the plural form as well. The terms "comprising," "including," and "having" specify the presence of the stated features, values, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, values, operations, components, elements, and / or combinations thereof.

[0032] Due to manufacturing techniques and / or limitations, the shapes illustrated in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include shape variations that occur during manufacturing.

[0033] As will be apparent upon understanding the disclosure of this application, the features of the instances described herein can be combined in various ways. Furthermore, although the instances described herein have various configurations, other configurations are also possible, as will be apparent upon understanding the disclosure of this application.

[0034] The disclosed sample is intended to provide an optical imaging system with a wide field of view.

[0035] In this example, the first lens of the optical imaging system refers to the lens closest to the object (or individual), and the sixth lens refers to the lens closest to the imaging plane (or image sensor). An image sensor with an imaging surface can be mounted on the imaging plane of the optical imaging system. The image sensor converts the image of the object formed by the lenses of the optical imaging system on the effective imaging area of ​​the imaging surface into an electrical signal. In this example, the units for radius of curvature, thickness, TTL (distance along the optical axis from the object-side surface of the first lens to the imaging plane), IMGHT (maximum effective image height of the optical imaging system, equal to half the diagonal length of the effective imaging area of ​​the imaging surface of the image sensor or half the diagonal length of the imaging plane), and focal length are indicated in millimeters (mm). The lens thickness, the gap between lenses, and TTL refer to the distance of the lenses along the optical axis. Additionally, in the lens shape description, one surface is a convex configuration indicator surface with a convex optical axis region, and one surface is a concave configuration indicator surface with a concave optical axis region. Therefore, even when describing a lens as having a convex surface, the lens edge can also be concave. Similarly, even when describing a lens as having a concave surface, the lens edge can also be convex.

[0036] The optical imaging system disclosed herein exhibits a distortion characteristic of less than 2% while achieving a wide field of view. Therefore, the optical imaging system disclosed herein can reduce image quality degradation caused by spherical aberration and distortion when capturing images at a wide field of view of 100 degrees or greater. For example, the optical imaging system disclosed herein can reduce severe distortion at the edges of images. Therefore, a camera module incorporating the optical imaging system disclosed herein can omit or reduce software operations for image correction.

[0037] An optical imaging system according to an example may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side. In the optical imaging system, the object sides of the second lens and the third lens may bulge. The sixth lens may have a predetermined refractive power. For example, the sixth lens may have negative refractive power. The optical imaging system may have a wide field of view. For example, the field of view (FOV) of the optical imaging system may be 100 degrees or greater. The optical imaging system may have a significant amount of distortion aberration at the maximum height of the imaging plane. For example, the optical imaging system may have distortion aberration less than +2% or less than -2% at the maximum height of the imaging plane. The following conditional expression illustrates one form of constraint used to express the FOV and distortion characteristics of the optical imaging system.

[0038] -2.0 < {IMGHT / (f*tan(FOV / 2))-1}*100 < 2.0

[0039] In the above conditional expressions, FOV is the field of view of the optical imaging system, IMGHT is half the diagonal length of the imaging plane, and f is the focal length of the optical imaging system.

[0040] An optical imaging system according to another example may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side. In the optical imaging system, the object sides of the second lens and the third lens may bulge. The optical imaging system may have a wide field of view. For example, the field of view (FOV) of the optical imaging system may be 100 degrees or greater. The optical imaging system may have a significant amount of distortion aberration at the maximum height of the imaging plane. For example, the optical imaging system may have distortion aberration less than +2% or less than -2% at the maximum height of the imaging plane. The following conditional expression illustrates another form of constraint condition used to express the FOV and distortion characteristics of the optical imaging system.

[0041] -2.0 < {IMGHT / (f*tan(FOV / 2))-1}*100 < 2.0

[0042] TTL / IMGHT < 1.4

[0043] In the above conditional expression, TTL is the distance (mm) from the object-side surface of the first lens to the imaging plane.

[0044] The detailed configuration of the optical imaging system will be described below.

[0045] An optical imaging system may include six lenses arranged sequentially from the object side in the direction of the imaging plane. For example, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially. The first to sixth lenses may be arranged at predetermined intervals. For example, the predetermined interval may be formed between the image-side surface of the front lens and the object-side surface of the rear lens.

[0046] The first lens may have refractive power. For example, the first lens may have positive or negative refractive power. One surface of the first lens may be concave. For example, the first lens may have a concave object-side surface or a concave image-side surface. The first lens may include aspherical surfaces. For example, both surfaces of the first lens may be aspherical. A curvature point may be formed on one surface of the first lens. For example, a curvature point may be formed on the object-side surface or the image-side surface of the first lens. However, a curvature point is not necessarily formed on one surface of the first lens. The first lens may be formed from a material with high light transmittance and excellent processability. For example, the first lens may be made of a plastic material. However, the material of the first lens is not limited to plastic materials. For example, the first lens may be made of glass. The first lens has a predetermined refractive index. For example, the refractive index of the first lens may be greater than 1.5 and less than 1.6.

[0047] The second lens may have refractive power. For example, the second lens may have positive or negative refractive power. The second lens may have refractive power with a sign different from that of the first lens. For example, when the first lens has positive refractive power, the second lens may have negative refractive power. Conversely, when the first lens has negative refractive power, the second lens may have positive refractive power. One surface of the second lens may be convex. For example, the second lens may have a convex side surface. The second lens may have an aspherical surface. For example, both surfaces of the second lens may be aspherical. The second lens may be formed of a material with high light transmittance and excellent processability. For example, the second lens may be made of plastic material. However, the material of the second lens is not limited to plastic material. For example, the second lens may be made of glass material. The second lens may have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.5 and less than 1.7.

[0048] The third lens may have refractive power. For example, the third lens may have positive or negative refractive power. One surface of the third lens may be convex. For example, the third lens may have a convex side surface. The third lens may have an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material with high light transmittance and excellent machinability. For example, the third lens may be made of plastic. However, the material of the third lens is not limited to plastic. For example, the third lens may be made of glass. The third lens may have a predetermined refractive index. For example, the refractive index of the third lens may be greater than 1.5 and less than 1.7.

[0049] The fourth lens may have refractive power. For example, the fourth lens may have positive or negative refractive power. One surface of the fourth lens may be concave. For example, the fourth lens may have a concave side surface. The fourth lens may have an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be made of a material with high light transmittance and excellent machinability. For example, the fourth lens may be made of plastic. However, the material of the fourth lens is not limited to plastic. For example, the fourth lens may be made of glass. The fourth lens may have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.5 and less than 1.7.

[0050] The fifth lens may have refractive power. For example, the fifth lens may have positive or negative refractive power. The fifth lens may have refractive power with a sign different from that of the fourth lens. For example, when the fourth lens has positive refractive power, the fifth lens may have negative refractive power. Conversely, when the fourth lens has negative refractive power, the fifth lens may have positive refractive power. One surface of the fifth lens may be convex. For example, the fifth lens may have a convex object-side surface or a convex image-side surface. The fifth lens may have an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. A curvature point may be formed on one surface of the fifth lens. For example, a curvature point may be formed on both the object-side and image-side surfaces of the fifth lens. The fifth lens may be formed from a material with high light transmittance and excellent processability. For example, the fifth lens may be made of plastic. However, the material of the fifth lens is not limited to plastic. For example, the fifth lens may be made of glass. The fifth lens may have a predetermined refractive index. For example, the refractive index of the fifth lens can be greater than 1.5 to less than 1.6.

[0051] The sixth lens may have refractive power. For example, the sixth lens may have negative refractive power. One surface of the sixth lens may be convex. For example, the sixth lens may have a convex object-side surface. The sixth lens may have an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. A curvature point may be formed on one surface of the sixth lens. For example, the curvature point may be formed on both the object-side and image-side surfaces of the sixth lens. The sixth lens may be formed from a material with high light transmittance and excellent machinability. For example, the sixth lens may be made of plastic. However, the material of the sixth lens is not limited to plastic. For example, the sixth lens may be made of glass. The sixth lens may have a predetermined refractive index. For example, the refractive index of the sixth lens may be greater than 1.5 and less than 1.65.

[0052] Each of the first through sixth lenses may have an aspherical surface. For example, at least one surface of the first through sixth lenses may be aspherical. The aspherical surface of each of the first through sixth lenses can be represented by Equation 1 as follows:

[0053] (Equation 1)

[0054] In Equation 1, "c" is the reciprocal of the radius of curvature of each individual lens, "k" is the quadratic constant, "r" is the distance from a point on the aspherical surface of the lens to the optical axis, "A" to "H" and "J" are aspherical constants, and "Z" (or SAG) is the height from a point on the aspherical surface to the vertex of the aspherical surface in the direction of the optical axis.

[0055] The optical imaging system may further include an aperture stop. The aperture stop may be positioned between the first lens and the second lens, or between the second lens and the third lens. The optical imaging system may further include a filter. The filter may be configured to block light of a specific wavelength from incident light incident through the first to sixth lenses. For example, the filter may block incident light of infrared wavelengths. The optical imaging system may further include an image sensor. The image sensor is configured to convert optical signals into electrical signals. The image sensor provides an area (imaging surface) in which the light refracted by the lenses can form an image of an individual. For example, the surface of the image sensor may form an imaging plane. The image sensor may include a charge-coupled device (CCD) or similar.

[0056] An optical imaging system can satisfy one or more of the following conditional expressions. 1.0 < f1 / f3 < 3.0 -1.5 < f3 / f4 < -0.7 0.6 < |f4 / f6| < 1.8 0.2 < f3 / f5 < 2.0 1.3 < TTL / IMGHT < 1.4 1.8 < f-number < 2.3

[0057] In this paper and the above conditional expressions, 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, TTL is the distance from the object-side surface of the first lens to the imaging plane, and IMGHT is half the diagonal length of the imaging plane.

[0058] In the following description, various examples of optical imaging systems will be described.

[0059] In the following description, the optical imaging system according to the first example will be described with reference to Figure 1.

[0060] The optical imaging system 100 may include lenses, each having refractive power. For example, the optical imaging system 100 may include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160.

[0061] The first lens 110 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The second lens 120 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 130 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 140 may have negative refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 150 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fifth lens 150 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the fifth lens 150. The sixth lens 160 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The sixth lens 160 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the sixth lens 160.

[0062] The optical imaging system 100 may include an aperture stop ST. For example, the aperture stop ST may be positioned between the second lens 120 and the third lens 130. The optical imaging system 100 may include a filter IF. For example, the filter IF may be positioned between the sixth lens 160 and the imaging plane IP. The filter IF can block light of a specific wavelength from incident. For example, the filter IF according to the first embodiment can block infrared light incident on the imaging plane IP.

[0063] The optical imaging system 100 exhibits the aberration characteristics illustrated in Figure 2. Table 1 lists the lens characteristics of the optical imaging system 100, and Table 2 lists the aspherical characteristics of the optical imaging system 100.

[0064] Table 1 Surface number Notes radius of curvature Thickness / Distance Refractive index Abbe number Effective radius S1 First lens -10.2396 0.3753 1.5460 56.2410 1.7719 S2 -4.4483 0.0500 1.5987 S3 Second lens 2.2768 0.3054 1.6190 25.9402 1.2273 S4 1.9091 0.3104 1.0085 S5 Aperture unlimited 0.2049 0.9000 S6 Third lens 11.4563 0.6556 1.5460 56.2410 1.0614 S7 -3.2842 0.3742 1.1800 S8 Fourth lens -2.6030 0.4500 1.6773 19.2373 1.2846 S9 -6.8792 0.5317 1.6101 S10 Fifth lens 132.9675 0.8344 1.5460 56.2410 2.1800 S11 -2.2669 0.7245 2.4894 S12 Sixth lens 2.0456 0.6400 1.5369 55.6518 3.7650 S13 1.0556 0.6276 4.3764 S14 Filter unlimited 0.2100 1.5183 64.1973 4.8031 S15 unlimited 0.6362 4.8787 S16 Imaging plane unlimited 0.0200 5.1200

[0065] Table 2 Surface number S1 S2 S3 S4 S6 S7 K -2.499.E+01 -5.610.E+01 -4.792.E+00 -2.878.E+00 1.498.E+01 5.945.E+00 4th 9.832.E-02 2.811.E-01 2.174.E-01 -1.456.E-01 -6.067.E-02 4.130.E-02 6th -6.866.E-02 -8.944.E-01 -1.089.E+00 2.031.E+00 9.494.E-01 -1.421.E+00 8th 4.654.​​E-02 2.631.E+00 4.861.E+00 -2.563.E+01 -1.133.E+01 1.305.E+01 10th 5.972.E-02 -5.986.E+00 -1.877.E+01 2.147.E+02 8.332.E+01 -7.529.E+01 12th -3.018.E-01 1.029.E+01 5.765.E+01 -1.220.E+03 -4.077.E+02 2.910.E+02 14th 5.784.E-01 -1.325.E+01 -1.348.E+02 4.854.E+03 1.385.E+03 -7.845.E+02 16th -6.804.E-01 1.275.E+01 2.356.E+02 -1.384.E+04 -3.353.E+03 1.512.E+03 18th 5.388.E-01 -9.116.E+00 -3.048.E+02 2.858.E+04 5.859.E+03 -2.111.E+03 20th -2.961.E-01 4.801.E+00 2.895.E+02 -4.278.E+04 -7.404.E+03 2.138.E+03 22 1.134.E-01 -1.830.E+00 -1.988.E+02 4.593.E+04 6.699.E+03 -1.554.E+03 24 -2.971.E-02 4.894.E-01 9.591.E+01 -3.445.E+04 -4.228.E+03 7.901.E+02 26 5.081.E-03 -8.692.E-02 -3.081.E+01 1.712.E+04 1.767.E+03 -2.666.E+02 28 -5.113.E-04 9.188.E-03 5.914.E+00 -5.068.E+03 -4.392.E+02 5.358.E+01 30 2.296.E-05 -4.366.E-04 -5.131.E-01 6.756.E+02 4.914.E+01 -4.853.E+00 surface edition S8 S9 S10 S11 S12 S13 K 4.1728.E-01 -5.2170.E+01 -9.9000.E+01 -2.2230.E+00 -1.6821.E+01 -4.1905.E+00 4th -1.2526.E-01 -1.0374.E-01 -3.9596.E-02 -6.2950.E-02 -7.2814.E-02 -4.1414.E-02 6th 2.5403.E-02 3.0336.E-02 1.3069.E-01 1.3651.E-01 1.3846.E-02 1.1426.E-02 8th -3.7442.E-02 -1.4304.E-02 -2.7209.E-01 -1.7050.E-01 3.1226.E-03 -2.3057.E-03 10th 6.8485.E-02 1.1445.E-02 3.4143.E-01 1.4245.E-01 -3.7139.E-03 3.5016.E-04 12th -3.9811.E-02 -4.4408.E-03 -2.7678.E-01 -7.8748.E-02 1.6591.E-03 -5.2052.E-05 14th 8.6156.E-03 6.5468.E-04 1.4654.E-01 2.7723.E-02 -4.7048.E-04 9.8103.E-06 16th 0 0 -4.8202.E-02 -5.2526.E-03 9.2608.E-05 -1.8253.E-06 18th 0 0 7.6255.E-03 -2.5270.E-05 -1.3025.E-05 2.5572.E-07 20th 0 0 7.8870.E-04 3.0053.E-04 1.3172.E-06 -2.5068.E-08 22nd 0 0 -7.1261.E-04 -8.5342.E-05 -9.4949.E-08 1.6968.E-09 24th 0 0 1.7242.E-04 1.2787.E-05 4.7572.E-09 -7.8009.E-11 26th 0 0 -2.2190.E-05 -1.1352.E-06 -1.5736.E-10 2.3328.E-12 No. 28 0 0 1.5318.E-06 5.6651.E-08 3.0895.E-12 -4.1013.E-14 No. 30 0 0 -4.4712.E-08 -1.2329.E-09 -2.7268.E-14 3.2202.E-16

[0066] In the following text, the optical imaging system according to the second example will be described with reference to Figure 3.

[0067] The optical imaging system 200 may include lenses, each having refractive power. For example, 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, and a sixth lens 260.

[0068] The first lens 210 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The second lens 220 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 230 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 240 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 250 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 250 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the fifth lens 250. The sixth lens 260 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The sixth lens 260 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the sixth lens 260.

[0069] The optical imaging system 200 may include an aperture stop ST. For example, the aperture stop ST may be positioned between the second lens 220 and the third lens 230. The optical imaging system 200 may include a filter IF. For example, the filter IF may be positioned between the sixth lens 260 and the imaging plane IP. The filter IF can block light of a specific wavelength from incident. For example, the filter IF according to the second embodiment can block infrared light incident on the imaging plane IP.

[0070] The optical imaging system 200 exhibits the aberration characteristics illustrated in Figure 4. Table 3 lists the lens characteristics of the optical imaging system 200, and Table 4 lists the aspherical characteristics of the optical imaging system 200.

[0071] Table 3 Surface number Notes radius of curvature Thickness / Distance Refractive index Abbe number Effective radius S1 First lens -16.1331 0.4478 1.5459 56.0948 1.7802 S2 -3.7193 0.0604 1.6213 S3 Second lens 3.9259 0.3000 1.6440 23.5076 1.3324 S4 2.9386 0.3357 1.1044 S5 Aperture unlimited 0.1025 0.9100 S6 Third lens 23.6511 0.5523 1.5459 56.0948 1.0067 S7 -3.5737 0.3456 1.1318 S8 Fourth lens -4.3524 0.4200 1.6769 19.2306 1.2084 S9 2000.0000 0.3786 1.5299 S10 Fifth lens -59.7521 1.2590 1.5366 55.7103 2.0600 S11 -1.7906 0.6266 2.4470 S12 Sixth lens 2.9373 0.6939 1.5366 55.7103 3.6300 S13 1.1111 0.5816 4.2913 S14 Filter unlimited 0.2100 1.5183 64.1973 4.7950 S15 unlimited 0.6163 4.8698 S16 Imaging plane unlimited 0.0200 5.1200

[0072] Table 4 Surface number S1 S2 S3 S4 S6 S7 K -9.735.E+01 -3.095.E+01 -1.583.E+01 -8.952.E+00 6.624.E+01 6.621.E+00 4th 6.022.E-02 2.318.E-01 2.121.E-01 -1.089.E-01 -1.003.E-01 -1.287.E-02 6th -1.073.E-01 -7.448.E-01 -1.338.E+00 9.016.E-01 1.709.E+00 -1.148.E+00 8th 3.871.E-01 2.169.E+00 6.668.E+00 -1.029.E+01 -2.080.E+01 1.342.E+01 10th -9.714.E-01 -4.885.E+00 -2.629.E+01 7.357.E+01 1.569.E+02 -9.532.E+01 12th 1.653.E+00 8.350.E+00 7.595.E+01 -3.504.E+02 -7.894.E+02 4.493.E+02 14th -1.964.E+00 -1.076.E+01 -1.592.E+02 1.164.E+03 2.768.E+03 -1.471.E+03 16th 1.669.E+00 1.042.E+01 2.427.E+02 -2.771.E+03 -6.939.E+03 3.431.E+03 18th -1.028.E+00 -7.531.E+00 -2.701.E+02 4.790.E+03 1.258.E+04 -5.785.E+03 20th 4.595.E-01 4.025.E+00 2.187.E+02 -6.023.E+03 -1.653.E+04 7.062.E+03 22nd -1.478.E-01 -1.563.E+00 -1.272.E+02 5.452.E+03 1.554.E+04 -6.181.E+03 24th 3.333.E-02 4.278.E-01 5.169.E+01 -3.460.E+03 -1.018.E+04 3.779.E+03 26th -5.004.E-03 -7.809.E-02 -1.393.E+01 1.460.E+03 4.396.E+03 -1.532.E+03 28th 4.494.E-04 8.525.E-03 2.235.E+00 -3.679.E+02 -1.122.E+03 3.699.E+02 30th -1.827.E-05 -4.208.E-04 -1.616.E-01 4.188.E+01 1.277.E+02 -4.026.E+01 surface edition S8 S9 S10 S11 S12 S13 K 6.8441.E+00 0.0000.E+00 -9.6397.E+01 -1.3902.E+00 -3.0871.E+01 -3.8948.E+00 4th -2.6771.E-01 -1.4929.E-01 -3.7976.E-02 -3.3006.E-02 -9.9112.E-02 -6.9275.E-02 6th 9.7244.E-01 -1.5532.E-02 4.9147.E-02 4.9625.E-02 1.1029.E-02 3.2178.E-02 8th -6.5187.E+00 7.3596.E-01 -1.4616.E-01 -4.6451.E-02 3.0253.E-02 -9.9349.E-03 10th 2.8769.E+01 -3.3048.E+00 2.9712.E-01 2.2723.E-02 -2.9993.E-02 1.7021.E-03 12th -8.0200.E+01 8.9188.E+00 -4.1096.E-01 2.5066.E-03 1.5276.E-02 -3.0121.E-05 14th 1.3648.E+02 -1.6272.E+01 3.9819.E-01 -1.2544.E-02 -5.0119.E-03 -6.3322.E-05 16th -1.1367.E+02 2.0965.E+01 -2.7449.E-01 9.6184.E-03 1.1369.E-03 1.7741.E-05 18th -4.6055.E+01 -1.9443.E+01 1.3628.E-01 -4.1341.E-03 -1.8370.E-04 -2.7077.E-06 20th 2.5169.E+02 1.3035.E+01 -4.8953.E-02 1.1444.E-03 2.1341.E-05 2.7069.E-07 22nd -3.3157.E+02 -6.2633.E+00 1.2626.E-02 -2.1176.E-04 -1.7716.E-06 -1.8466.E-08 No. 24 2.4448.E+02 2.1033.E+00 -2.2814.E-03 2.6090.E-05 1.0262.E-07 8.5477.E-10 No. 26 -1.0842.E+02 -4.6880.E-01 2.7421.E-04 -2.0543.E-06 -3.9414.E-09 -2.5733.E-11 No. 28 2.7121.E+01 6.2316.E-02 -1.9682.E-05 9.3357.E-08 9.0239.E-11 4.5491.E-13 No. 30 -2.9542.E+00 -3.7388.E-03 6.3777.E-07 -1.8558.E-09 -9.3231.E-13 -3.5846.E-15

[0073] The optical imaging system according to the third example will be described below with reference to Figure 5.

[0074] The optical imaging system 300 may include lenses, each having refractive power. For example, the optical imaging system 300 includes a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, and a sixth lens 360.

[0075] The first lens 310 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The second lens 320 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The third lens 330 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The fourth lens 340 may have negative refractive power and may have a concave object-side surface and a concave image-side surface. The fifth lens 350 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 350 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the fifth lens 350. The sixth lens 360 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The sixth lens 360 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the sixth lens 360.

[0076] The optical imaging system 300 may include an aperture stop ST. For example, the aperture stop ST may be positioned between the second lens 320 and the third lens 330. The optical imaging system 300 may include a filter IF. For example, the filter IF may be positioned between the sixth lens 360 and the imaging plane IP. The filter IF can block light of a specific wavelength from incident. For example, the filter IF according to the third embodiment can block infrared light incident on the imaging plane IP.

[0077] The optical imaging system 300 exhibits the aberration characteristics illustrated in Figure 6. Table 5 lists the lens characteristics of the optical imaging system 300, and Table 6 lists the aspherical characteristics of the optical imaging system 300.

[0078] Table 5 Surface number Notes radius of curvature Thickness / Distance Refractive index Abbe number Effective radius S1 First lens -143.7315 0.4454 1.5459 56.0948 1.7217 S2 -4.7085 0.0500 1.5667 S3 Second lens 4.1326 0.3000 1.6440 23.5076 1.3240 S4 3.0576 0.3293 1.0987 S5 Aperture unlimited 0.0829 0.9100 S6 Third lens 51.8872 0.5788 1.5366 55.7103 0.9770 S7 -3.5038 0.3968 1.1429 S8 Fourth lens -5.0165 0.4200 1.6769 19.2306 1.2770 S9 83.3767 0.4496 1.6203 S10 Fifth lens -11.9515 1.0700 1.5366 55.7103 1.9689 S11 -1.6277 0.5938 2.2500 S12 Sixth lens 2.8210 0.7211 1.5366 55.7103 3.8193 S13 1.1273 0.6259 4.3382 S14 Filter unlimited 0.2100 1.5183 64.1973 4.8067 S15 unlimited 0.6567 4.8798 S16 Imaging plane unlimited 0.0200 5.1200

[0079] Table 6 Surface number S1 S2 S3 S4 S6 S7 K -9.900.E+01 -2.704.E+01 -1.635.E+01 -7.782.E+00 9.069.E+01 6.399.E+00 4th 4.338.E-02 2.202.E-01 1.495.E-01 -8.482.E-02 -4.272.E-02 -6.039.E-02 6th -4.152.E-02 -6.588.E-01 -9.020.E-01 3.099.E-01 4.193.E-01 -3.680.E-02 8th 1.639.E-01 1.927.E+00 4.186.E+00 -3.352.E+00 -6.912.E+00 1.087.E+00 10th -4.729.E-01 -4.452.E+00 -1.578.E+01 2.421.E+01 6.723.E+01 -1.015.E+01 12th 9.264.E-01 7.765.E+00 4.444.E+01 -1.161.E+02 -4.249.E+02 5.548.E+01 14th -1.270.E+00 -1.011.E+01 -9.192.E+01 3.875.E+02 1.835.E+03 -1.983.E+02 16th 1.247.E+00 9.796.E+00 1.396.E+02 -9.282.E+02 -5.579.E+03 4.880.E+02 18th -8.882.E-01 -7.051.E+00 -1.556.E+02 1.621.E+03 1.214.E+04 -8.473.E+02 20th 4.596.E-01 3.742.E+00 1.267.E+02 -2.068.E+03 -1.897.E+04 1.047.E+03 22nd -1.708.E-01 -1.442.E+00 -7.428.E+01 1.908.E+03 2.111.E+04 -9.153.E+02 24th 4.443.E-02 3.916.E-01 3.048.E+01 -1.239.E+03 -1.631.E+04 5.534.E+02 26th -7.670.E-03 -7.108.E-02 -8.300.E+00 5.366.E+02 8.311.E+03 -2.202.E+02 28 7.892.E-04 7.732.E-03 1.346.E+00 -1.391.E+02 -2.510.E+03 5.185.E+01 30 -3.662.E-05 -3.811.E-04 -9.825.E-02 1.631.E+01 3.401.E+02 -5.480.E+00 surface edition S8 S9 S10 S11 S12 S13 K 2.5315.E+00 -8.3994.E+00 3.5316.E+01 -1.1411.E+00 -2.6644.E+01 -3.4149.E+00 4th -2.1113.E-01 -9.1572.E-02 2.6473.E-04 6.5968.E-03 -4.6938.E-02 -6.3480.E-02 6th 7.0295.E-01 -1.7205.E-01 -2.9070.E-02 -9.1384.E-02 -4.0735.E-02 2.2220.E-02 8th -5.5194.E+00 9.4994.E-01 -3.6259.E-02 3.2411.E-01 5.9983.E-02 -3.3105.E-03 10th 2.7490.E+01 -2.8564.E+00 1.9398.E-01 -6.6035.E-01 -4.0062.E-02 -9.1946.E-04 12th -8.9797.E+01 5.8614.E+00 -3.8099.E-01 8.5908.E-01 1.6981.E-02 6.4874.E-04 14th 2.0227.E+02 -8.5364.E+00 4.5855.E-01 -7.6038.E-01 -4.9165.E-03 -1.8203.E-04 16th -3.2342.E+02 9.0107.E+00 -3.7637.E-01 4.7322.E-01 1.0054.E-03 3.1823.E-05 18th 3.7239.E+02 -6.9611.E+00 2.1996.E-01 -2.1053.E-01 -1.4772.E-04 -3.8085.E-06 20th -3.0937.E+02 3.9349.E+00 -9.2752.E-02 6.7222.E-02 1.5668.E-05 3.2131.E-07 22nd 1.8338.E+02 -1.6093.E+00 2.8034.E-02 -1.5265.E-02 -1.1899.E-06 -1.9135.E-08 24th -7.5426.E+01 4.6367.E-01 -5.9204.E-03 2.4035.E-03 6.3149.E-08 7.8815.E-10 26th 2.0379.E+01 -8.9299.E-02 8.2884.E-04 -2.4916.E-04 -2.2248.E-09 -2.1372.E-11 28th -3.2364.E+00 1.0322.E-02 -6.9065.E-05 1.5285.E-05 4.6770.E-11 3.4330.E-13 30th 2.2738.E-01 -5.4176.E-04 2.5919.E-06 -4.2023.E-07 -4.4411.E-13 -2.4746.E-15

[0080] The optical imaging system according to the fourth example will be described with reference to Figure 7.

[0081] The optical imaging system 400 may include lenses, each having refractive power. For example, the optical imaging system 400 includes a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, and a sixth lens 460.

[0082] The first lens 410 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The second lens 420 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The third lens 430 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The fourth lens 440 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 450 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The fifth lens 450 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the fifth lens 450. The sixth lens 460 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The sixth lens 460 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the sixth lens 460.

[0083] The optical imaging system 400 may include an aperture stop ST. For example, the aperture stop ST may be positioned between the first lens 410 and the second lens 420. The optical imaging system 400 may include a filter IF. For example, the filter IF may be positioned between the sixth lens 460 and the imaging plane IP. The filter IF can block light of a specific wavelength from entering. For example, the filter IF according to the fourth embodiment can block infrared light from entering the imaging plane IP.

[0084] The optical imaging system 400 exhibits the aberration characteristics illustrated in Figure 8. Table 7 lists the lens characteristics of the optical imaging system 400, and Table 8 lists the aspherical characteristics of the optical imaging system 400.

[0085] Table 7 Surface number Notes radius of curvature Thickness / Distance Refractive index Abbe number Effective radius S1 First lens 30.5364 0.2600 1.5459 56.1138 1.4700 S2 6.2121 0.6694 1.2185 S3 Second lens 3.9885 1.0695 1.5459 56.1138 0.9500 S4 -2.5329 0.1093 1.1200 S5 Third lens 7.6667 0.2600 1.6776 19.2459 1.2467 S6 2.8571 0.8919 1.3649 S7 Fourth lens -5.9311 0.7729 1.5459 56.1138 1.7500 S8 -2.1066 0.3313 1.9996 S9 Fifth lens 5.2286 0.4000 1.5703 37.3571 2.5834 S10 3.7002 0.4345 3.3568 S11 Sixth lens 1.5138 0.4502 1.6193 25.9599 3.9938 S12 1.0265 0.4340 4.2191 S13 Filter unlimited 0.2100 1.5183 64.1973 4.7516 S14 unlimited 0.6668 4.8320 S15 Imaging plane unlimited 0.0200 5.1200

[0086] Table 8 surface edition S1 S2 S3 S4 S5 S6 K -3.624.E+01 1.721.E+01 -3.594.E+00 -1.470.E+00 -1.696.E+01 -1.327.E+00 4th 9.111.E-02 1.337.E-01 1.924.E-02 2.151.E-02 -5.806.E-02 -7.568.E-02 6th -2.588.E-03 -1.872.E-01 -2.361.E-01 -2.193.E-01 1.683.E-01 8.891.E-02 8th -2.502.E-01 1.275.E+00 4.658.E+00 1.717.E+00 -1.142.E+00 -1.459.E-01 10th 1.189.E+00 -6.837.E+00 -5.390.E+01 -1.103.E+01 5.660.E+00 8.897.E-02 12th -3.430.E+00 2.580.E+01 3.934.E+02 5.054.E+01 -1.949.E+01 8.481.E-01 14th 6.733.E+00 -6.952.E+01 -1.926.E+03 -1.653.E+02 4.783.E+01 -3.797.E+00 16th -9.351.E+00 1.357.E+02 6.558.E+03 3.888.E+02 -8.552.E+01 8.411.E+00 18th 9.342.E+00 -1.934.E+02 -1.584.E+04 -6.614.E+02 1.126.E+02 -1.177.E+01 20th -6.734.E+00 2.008.E+02 2.734.E+04 8.123.E+02 -1.092.E+02 1.110.E+01 22nd 3.469.E+00 -1.500.E+02 -3.346.E+04 -7.121.E+02 7.703.E+01 -7.164.E+00 24th -1.245.E+00 7.841.E+01 2.836.E+04 4.340.E+02 -3.840.E+01 3.130.E+00 26 2.958.E-01 -2.718.E+01 -1.584.E+04 -1.746.E+02 1.281.E+01 -8.858.E-01 28 -4.176.E-02 5.608.E+00 5.241.E+03 4.167.E+01 -2.561.E+00 1.466.E-01 30 2.653.E-03 -5.206.E-01 -7.781.E+02 -4.466.E+00 2.319.E-01 -1.077.E-02 surface edition S7 S8 S9 S10 S11 S12 K 2.6896.E+00 -8.4733.E-01 -6.7403.E-01 -4.1475.E+00 -2.0652.E+00 -1.1067.E+00 4th 1.3106.E-02 5.6580.E-02 1.2012.E-01 2.1907.E-02 -2.4260.E-01 -3.2266.E-01 6th -1.0087.E-02 1.3144.E-02 2.5726.E-02 1.9922.E-01 1.2278.E-01 1.8260.E-01 8th -5.9895.E-03 -2.9008.E-01 -2.5628.E-01 -3.1718.E-01 -5.1196.E-02 -8.7618.E-02 10th 1.0206.E-02 6.6065.E-01 3.8317.E-01 2.3001.E-01 2.0945.E-02 3.4525.E-02 12th -2.7125.E-03 -9.0570.E-01 -3.7030.E-01 -1.0353.E-01 -6.8278.E-03 -1.0367.E-02 14th -3.0208.E-02 8.6006.E-01 2.4958.E-01 3.2123.E-02 1.5930.E-03 2.2906.E-03 16th 8.2998.E-02 -5.8705.E-01 -1.1823.E-01 -7.1989.E-03 -2.6506.E-04 -3.6921.E-04 18th -1.0856.E-01 2.9190.E-01 3.9584.E-02 1.1877.E-03 3.1926.E-05 4.3332.E-05 20th 8.5227.E-02 -1.0587.E-01 -9.3783.E-03 -1.4451.E-04 -2.8035.E-06 -3.6856.E-06 22nd -4.3010.E-02 2.7724.E-02 1.5598.E-03 1.2804.E-05 1.7823.E-07 2.2425.E-07 24th 1.4131.E-02 -5.1058.E-03 -1.7792.E-04 -8.0225.E-07 -7.9988.E-09 -9.4979.E-09 26th -2.9339.E-03 6.2697.E-04 1.3245.E-05 3.3632.E-08 2.4040.E-10 2.6569.E-10 28th 3.5067.E-04 -4.6031.E-05 -5.7931.E-07 -8.4509.E-10 -4.3397.E-12 -4.4090.E-12 No. 30 -1.8434.E-05 1.5259.E-06 1.1290.E-08 9.6113.E-12 3.5550.E-14 3.2851.E-14

[0087] The optical imaging system according to the fifth example will be described with reference to Figure 9.

[0088] The optical imaging system 500 may include lenses, each having refractive power. For example, the optical imaging system 500 includes a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, and a sixth lens 560.

[0089] The first lens 510 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The second lens 520 may have positive refractive power and may have a convex object-side surface and a convex image-side surface. The third lens 530 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The fourth lens 540 may have positive refractive power and may have a concave object-side surface and a convex image-side surface. The fifth lens 550 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The fifth lens 550 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the fifth lens 550. The sixth lens 560 may have negative refractive power and may have a convex object-side surface and a concave image-side surface. The sixth lens 560 may have a shape with a curvature point. For example, the curvature point may be formed on the object-side surface and the image-side surface of the sixth lens 560.

[0090] The optical imaging system 500 may include an aperture stop ST. For example, the aperture stop ST may be positioned between a first lens 510 and a second lens 520. The optical imaging system 500 may include a filter IF. For example, the filter IF may be positioned between a sixth lens 560 and an imaging plane IP. The filter IF can block light of a specific wavelength from entering. For example, the filter IF according to the fifth embodiment can block infrared light from entering the imaging plane IP.

[0091] The optical imaging system 500 exhibits the aberration characteristics illustrated in Figure 10. Table 9 lists the lens characteristics of the optical imaging system 500, and Table 10 lists the aspherical characteristics of the optical imaging system 500.

[0092] Table 9 Surface number Notes radius of curvature Thickness / Distance Refractive index Abbe number Effective radius S1 First lens 26.8543 0.2600 1.5459 56.1138 1.4700 S2 6.6911 0.6469 1.2287 S3 Second lens 4.1358 1.0556 1.5459 56.1138 0.9600 S4 -2.6137 0.0935 1.1200 S5 Third lens 6.6378 0.2600 1.6776 19.2459 1.2395 S6 2.7410 0.9337 1.3498 S7 Fourth lens -5.7522 0.7537 1.5459 56.1138 1.7500 S8 -2.0430 0.3140 1.9966 S9 Fifth lens 4.7954 0.4038 1.5703 37.3571 2.5562 S10 3.3664 0.5373 3.3236 S11 Sixth lens 1.7301 0.4500 1.6193 25.9599 4.0434 S12 1.0955 0.3744 4.2712 S13 Filter unlimited 0.2100 1.5183 64.1973 4.7666 S14 unlimited 0.6705 4.8452 S15 Imaging plane unlimited 0.0160 5.1200

[0093] Table 10 Surface number S1 S2 S3 S4 S5 S6 K -9.900.E+01 1.743.E+01 -3.128.E+00 -1.561.E+00 -1.683.E+01 -1.427.E+00 4th 9.976.E-02 1.367.E-01 1.649.E-02 1.023.E-02 -7.144.E-02 -8.558.E-02 6th -1.047.E-01 -2.049.E-01 -1.275.E-01 -8.891.E-02 2.186.E-01 1.005.E-01 8th 3.119.E-01 1.186.E+00 2.759.E+00 5.536.E-01 -1.163.E+00 -1.012.E-01 10th -7.573.E-01 -5.271.E+00 -3.353.E+01 -3.138.E+00 4.897.E+00 -1.988.E-01 12th 1.192.E+00 1.670.E+01 2.498.E+02 1.297.E+01 -1.475.E+01 1.718.E+00 14th -1.102.E+00 -3.837.E+01 -1.230.E+03 -3.999.E+01 3.160.E+01 -5.633.E+00 16th 3.311.E-01 6.483.E+01 4.180.E+03 9.157.E+01 -4.871.E+01 1.140.E+01 18th 5.446.E-01 -8.114.E+01 -1.002.E+04 -1.539.E+02 5.446.E+01 -1.554.E+01 20th -8.679.E-01 7.502.E+01 1.710.E+04 1.874.E+02 -4.423.E+01 1.469.E+01 22 6.367.E-01 -5.053.E+01 -2.064.E+04 -1.626.E+02 2.587.E+01 -9.669.E+00 24 -2.826.E-01 2.406.E+01 1.723.E+04 9.762.E+01 -1.065.E+01 4.349.E+00 26 7.755.E-02 -7.665.E+00 -9.464.E+03 -3.850.E+01 2.934.E+00 -1.276.E+00 28 -1.218.E-02 1.463.E+00 3.076.E+03 8.966.E+00 -4.884.E-01 2.203.E-01 30 8.398.E-04 -1.262.E-01 -4.484.E+02 -9.344.E-01 3.726.E-02 -1.697.E-02 surface edition S7 S8 S9 S10 S11 S12 K 2.343.E+00 -9.433.E-01 -1.721.E+00 -4.475.E+00 -1.949.E+00 -1.097.E+00 4th 1.817.E-02 6.593.E-02 1.213.E-01 3.249.E-02 -2.718.E-01 -3.413.E-01 6th -7.074.E-02 -1.574.E-02 -1.884.E-03 1.674.E-01 1.801.E-01 2.306.E-01 8th 3.219.E-01 -2.128.E-01 -1.978.E-01 -2.772.E-01 -1.051.E-01 -1.294.E-01 10th -9.761.E-01 5.421.E-01 3.118.E-01 1.993.E-01 5.038.E-02 5.362.E-02 12th 1.898.E+00 -8.081.E-01 -3.145.E-01 -8.742.E-02 -1.703.E-02 -1.568.E-02 14th -2.541.E+00 8.335.E-01 2.205.E-01 2.612.E-02 3.970.E-03 3.260.E-03 16th 2.437.E+00 -6.155.E-01 -1.079.E-01 -5.583.E-03 -6.510.E-04 -4.889.E-04 18th -1.703.E+00 3.290.E-01 3.706.E-02 8.707.E-04 7.647.E-05 5.342.E-05 20th 8.683.E-01 -1.274.E-01 -8.953.E-03 -9.922.E-05 -6.482.E-06 -4.255.E-06 22nd -3.192.E-01 3.536.E-02 1.510.E-03 8.146.E-06 3.940.E-07 2.443.E-07 24th 8.233.E-02 -6.857.E-03 -1.740.E-04 -4.668.E-07 -1.677.E-08 -9.833.E-09 No. 26 -1.412.E-02 8.810.E-04 1.303.E-05 1.758.E-08 4.751.E-10 2.632.E-10 No. 28 1.446.E-03 -6.730.E-05 -5.710.E-07 -3.872.E-10 -8.050.E-12 -4.205.E-12 No. 30 -6.685.E-05 2.310.E-06 1.110.E-08 3.723.E-12 6.176.E-14 3.031.E-14

[0094] Tables 11 and 12 list the optical characteristics and conditional expressions of the optical imaging systems based on Examples 1 through 5.

[0095] Table 11 Notes First Case Second example Third example Fourth example Fifth Example f number 2.250 2.250 2.240 2.250 2.280 TTL 7.000 7.000 7.000 7.000 7.000 IMGHT 5.120 5.120 5.120 5.120 5.120 FOV 100.027 100.135 100.132 102.967 101.026 f 4.3025 4.2926 4.2930 4.0212 4.1651 f1 14.0834 8.7426 8.9069 -14.3391 -16.3982 f2 -27.9775 -20.5946 -20.4912 3.0120 3.1052 f3 4.7498 5.7278 6.1396 -6.8717 -7.0818 f4 -6.4570 -6.4150 -6.9766 5.5856 5.4151 f5 4.091 3.414 3.389 -24.525 -22.073 f6 -5.2470 -3.8402 -4.1105 -7.9617 -6.6168

[0096] Table 12 conditional expression First Case Second example Third Case Fourth example Fifth Case (IMGHT / (f*tan(FOV / 2))-1)*100 -0.1948 -0.1569 -0.1601 1.3384 1.2864 f1 / f3 2.9648 1.5264 1.4507 2.0866 2.3154 f3 / f4 -0.7356 -0.8929 -0.8800 -1.2302 -1.3078 |f4 / f6| 1.2306 1.6706 1.6976 0.7016 0.8183 f3 / f5 1.1611 1.6778 1.8117 0.2802 0.3208 TTL / IMGHT 1.3574 1.3578 1.3576 1.3631 1.3633

[0097] As described above, an optical imaging system with a field of view of 100 degrees or greater and an f-number of 2.3 or less can be realized.

[0098] Although specific examples have been described and illustrated 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 should be considered only in a descriptive sense and not for limiting purposes. The description of features or manner in each example should be regarded as applicable to similar features or manner in other examples. Suitable results may 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 a different manner and / or replaced or supplemented with other components or their equivalents. Therefore, the scope of this disclosure is not defined by the implementation method but by the claims and their equivalents, and all changes falling within the scope of the claims and their equivalents should be interpreted as being included in this disclosure.

[0099] 100, 200, 300, 400, 500: Optical Imaging Systems 110, 210, 310, 410, 510: First lens 120, 220, 320, 420, 520: Second lens 130, 230, 330, 430, 530: Third lens 140, 240, 340, 440, 540: Fourth lens 150, 250, 350, 450, 550: Fifth lens 160, 260, 360, 460, 560: Sixth lens IF: Filter IP: Imaging Plane ST: Aperture

Claims

1. An optical imaging system, comprising: The first lens has positive refractive power and protrudes from the image-side surface; The second lens has negative refractive power; The third lens has refractive power; The fourth lens has refractive power; The fifth lens has positive refractive power; And a sixth lens, having refractive power, wherein the first lens to the sixth lens are arranged in sequence from the object side toward the imaging plane, wherein the optical imaging system has a total of six lenses with refractive power, wherein TTL / IMGHT < 1.4 and 0.6 < |f4 / f6| < 1.8, where TTL is the distance from the object-side surface of the first lens to the imaging plane, IMGHT is half the diagonal length of the imaging plane, f4 is the focal length of the fourth lens, and f6 is the focal length of the sixth lens.

2. The optical imaging system as claimed in claim 1, wherein the second lens has a protruding side surface.

3. The optical imaging system as claimed in claim 1, wherein the second lens has a concave image-side surface.

4. The optical imaging system as claimed in claim 1, wherein the third lens has a protruding side surface.

5. The optical imaging system as claimed in claim 1, wherein the fourth lens has a concave object-side surface.

6. The optical imaging system of claim 1, wherein the fourth lens has a concave image-side surface.

7. The optical imaging system as claimed in claim 1, wherein the fifth lens has a protruding side surface.

8. The optical imaging system of claim 1, wherein the sixth lens has a protruding side surface.

9. The optical imaging system of claim 1, wherein the sixth lens has a concave image-side surface.

10. The optical imaging system as claimed in claim 1, wherein 1.8 < f number < 2.3.

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