Patent ID: 12242041

Throughout the drawings and the detailed description, the same reference numerals refer to the same elements. The drawings may not be to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the disclosure of this application. For example, the sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed as will be apparent after an understanding of the disclosure of this application, with the exception of operations necessarily occurring in a certain order. Also, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and/or systems described herein that will be apparent after an understanding of the disclosure of this application. Hereinafter, while embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, it is noted that examples are not limited to the same.

Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there can be no other elements intervening therebetween.

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

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

Spatially relative terms such as “above,” “upper,” “below,” and “lower” may be used herein for ease of description to describe one element's relationship to another element as shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above” or “upper” relative to another element will then be “below” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (for example, rotated 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly.

The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof.

Due to manufacturing techniques and/or tolerances, variations of the shapes shown in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways as will be apparent after an understanding of the disclosure of this application. Further, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the disclosure of this application.

Herein, it is noted that use of the term “may” with respect to an example, for example, as to what an example may include or implement, means that at least one example exists in which such a feature is included or implemented while all examples are not limited thereto.

In the following lens configuration diagrams, thicknesses, sizes and sizes of lenses have been slightly exaggerated for convenience of explanation. Particularly, shapes of spherical surfaces or aspherical surfaces suggested in the lens configuration diagrams are suggested by way of example. The shapes of the spherical surfaces or the aspherical surfaces are not limited to those illustrated in the lens configuration diagrams.

In addition, in each lens, a first surface may refer to a surface close to an object side (an object-side surface) and a second surface may refer to a surface close to an image side (an image-side surface). In addition, in the present specification, numerical values of a radius of curvature, a thickness, a distance, a focal length, and the like of a lens may all be in mm, and an unit of an angle is in degrees.

In an explanation of a shape of each lens, a convex shape of one surface may mean that a paraxial region of the surface may be convex, and a concave shape of one surface may mean that a paraxial region of the surface may be concave. Therefore, even when one surface of the lens is described as a convex shape, an edge portion of the lens may be concave. Similarly, even when one surface of the lens is described as a concave shape, an edge portion of the lens may be convex.

The paraxial region may mean a narrow region near and including an optical axis.

Meanwhile, an aspherical surface of a lens may be represented by following Equation 1.

Z=cY21+1-(1+K)⁢c2⁢Y2+AY4+BY6+CY8+DY1⁢0+EY1⁢2+FY1⁢4+GY1⁢6+HY18+…[Equation⁢1]

where c is a curvature of a lens (a reciprocal of a radius of curvature), k is a conic constant, and Y is a distance from an arbitrary point on an aspherical surface of a lens to an optical axis. Further, constants A to H may mean aspherical constants. Z (or SAG) may represent a distance from an arbitrary point on an aspherical surface of a lens to an apex of the aspherical surface in a direction of the optical axis.

An aspect of the present disclosure is to provide an optical imaging system having a wide angle of view and being bright. Another aspect of the present disclosure is to provide an optical imaging system capable of capturing a subject at various distances.

Referring toFIG.1, a mobile electronic device4according to an embodiment of the present disclosure may be provided with a display5and an optical imaging system, and the optical imaging system may include a plurality of optical imaging systems. In addition, respective optical imaging systems may include a plurality of lenses.

For example, the optical imaging system of the mobile electronic device4may be provided with a first optical imaging system1, a second optical imaging system2and a third optical imaging system3.

The first optical imaging system1, the second optical imaging system2and the third optical imaging system3may be configured to have different angles of view from each other.

The first optical imaging system1may be configured to have the widest angle of view (for example, a wide angle lens) and the third optical imaging system3may be configured to have the narrowest angle of view (for example, a telephoto lens). The second optical imaging system2may have a narrower angle of view than the first optical imaging system1and may have a wider angle of view than the third optical imaging system3.

As an example, an angle of view (FOV1) of the first optical imaging system1may be FOV1≥100°, an angle of view (FOV2) of the second optical imaging system2may be 70° s FOV2<100° and an angle of view (FOV3) of the third optical imaging system3may be FOV3<54°. Meanwhile, the angle of view (FOV2) of the second optical imaging system2may be 60° s FOV2<100°.

In addition, TTL/F of the first optical imaging system1and the second optical imaging system2may be 1.0 or more, respectively, and TTL/F of the third optical imaging system3may be less than 1.0. Here, TTL may be a distance from an object side of a first lens of each optical imaging system to an imaging surface of an image sensor, and F may be a total focal length of each optical imaging system.

By implementing angles of view of the three optical imaging systems to be different from each other, an image of a subject may be captured at various distances, and a zoom function may be realized.

For example, an optical zoom effect for the same subject may be obtained by converting between the first optical imaging system1, the second optical imaging system2, and the third optical imaging system3.

In addition, since three images for one subject may be used (for example, synthesized) to generate a high-resolution image or a bright image, an image of a subject may be clearly captured even in a low-light environment.

The first optical imaging system1to the third optical imaging system3may satisfy the following conditional expressions.
1.5<FOV1/FOV3<4.0  [Conditional Expression 1]
2.5≤F3′/F1′  [Conditional Expression 2]
1.5≤F2′/F1′≤2.5  [Conditional Expression 3]

In the conditional expressions, FOV1 may represent the angle of view of the first optical imaging system1, FOV3 may represent the angle of view of the third optical imaging system3, F1′ may represent a focal length in which the total focal length of the first optical imaging system1is converted into 35 mm format (based on an image sensor size of a 35 mm film camera), F2′ may represent a focal length in which the total focal length of the second optical imaging system2is converted into 35 mm format and F3′ may represent a focal length in which the total focal length of the third optical imaging system3is converted into 35 mm format.

Table 1 shows examples of the total focal length and the converted focal length of each embodiment of the first optical imaging system1, the second optical imaging system2, and the third optical imaging system3. In Table 1, F represents the total focal length of each embodiment, and F′ represents the focal length converted based on the image sensor size of the 35 mm film camera. The units may be mm.

TABLE 1EmbodimentFF′First optical imaging12.2116.43system (1)22.1415.9131.83713.6641.80413.4651.80413.4661.813.43Second optical14.325.14imaging system (2)24.3125.2034.2925.02Third optical imaging15.99749.71system (3)26.00148.0836.00149.55

Hereinafter, the first optical imaging system1will be described with reference toFIGS.2to13.

The first optical imaging system1may satisfy at least one of the following conditional expressions.
FOV1≥1000  [Conditional Expression 4]
Fno1≤2.4  [Conditional Expression 5]
TTL1/F1>2.0  [Conditional Expression 6]
1.0<|f1_1/F1|<2.0  [Conditional Expression 7]
−1.0<f3_1/f1_1<0  [Conditional Expression 8]
0.5<R2_1/F1<2.0  [Conditional Expression 9]
v2_1<26  [Conditional Expression 10]
v1_1−v2_1>30  [Conditional Expression 11]
AVR(v3_1,v4_1)>55  [Conditional Expression 12]
AVR(v5_1,v6_1)<21  [Conditional Expression 13]
AVR(v3_1,v5_1)>55  [Conditional Expression 14]
AVR(v4_1,v6_1)<24  [Conditional Expression 15]
v2_1+v6_1<v3_1  [Conditional Expression 16]

TTL1 may be a distance from an object side of the first lens of the first optical imaging system1to an imaging surface of an image sensor, F1 may be a total focal length of the first optical imaging system1, f1_1 may be a focal length of the first lens of the first optical imaging system1, f3_1 may be a focal length of the third lens of the first optical imaging system1, R2_1 may be a radius of curvature of image side surface of the first lens of the first optical imaging system1, v1_1 may be an Abbe number of the first lens of the first optical imaging system1, v2_1 may be an Abbe number of the second lens of the first optical imaging system1, v3_1 may be an Abbe number of the third lens of the first optical imaging system1, v4_1 may be an Abbe number of the fourth lens of the first optical imaging system1, v5_1 may be an Abbe number of the fifth lens of the first optical imaging system1, and v6_1 may be an Abbe number of the sixth lens of the first optical imaging system1.

In addition, AVR(v3_1, v4_1) may be an average value of the Abbe number of the third lens and the Abbe number of the fourth lens, AVR(v5_1, v6_1) may be an average value of the Abbe number of the fifth lens and the Abbe number of the sixth lens, AVR(v3_1, v5_1) may be an average value of the Abbe number of the third lens and the Abbe number of the fifth lens, and AVR(v4_1, v6_1) may be an average value of the Abbe number of the fourth lens and the Abbe number of the sixth lens.

Referring toFIGS.2and3, a first embodiment of the first optical imaging system1of the present disclosure may include an optical system including a first lens11, a second lens12, a third lens13, a fourth lens14, a fifth lens15and a sixth lens16, and may further include an infrared block filter17(hereinafter, referred to as a ‘filter’) and an image sensor18.

The first lens11to the sixth lens16may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens11to the sixth lens16may be formed of a plastic material.

Table 2 illustrates lens characteristics (a radius of curvature, a thickness of a lens, or a distance between lenses, a refractive index, an Abbe number, and a focal length) of respective lenses.

TABLE 2RadiusThicknessRefrac-SurfaceRefer-ofortiveAbbeFocalnumberencecurvatureDistanceindexnumberlengthS1First−3.3610.3751.54456.1−3.318lensS24.0830.457S3Second4.378540.2501.63923.58.197lensS425.0980.084S5Third−3.3270.5991.54456.12.729lensS6−1.0940.030S7Fourth4.4000.5191.54456.12.816lensS8−2.2650.030S9Fifth−5.8790.2001.67119.2−3.339lensS103.7270.993S11Sixth1.9050.4831.6521.5−15.765lensS121.4470.251S13FilterInfinity0.2101.51764.2S14Infinity0.620S15ImagingInfinity0.02000surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 2.21 mm, the angle of view FOV1 may be 117.4°, Fno1 may be 2.2, TTL1 may be 5.12 mm, and BFL1 may be 1.101 mm.

Here, Fno1 may be a number (f-number) representing brightness of the first optical imaging system, TTL1 may be a distance from the object side surface of the first lens11of the first optical imaging system1to the imaging surface of the image sensor18, and BFL1 may be a distance from the image side surface of the sixth lens16of the imaging surface of the image sensor18.

In the first embodiment of the first optical imaging system1, the first lens11may have negative refractive power, and first and second surfaces of the first lens11may be concave in a paraxial region.

In addition, at least one inflection point may be formed on the first surface of the first lens11. For example, the first surface of the first lens11may be concave in the paraxial region and may be convex toward an edge.

The second lens12may have positive refractive power, a first surface of the second lens12may be convex in a paraxial region and a second surface of the second lens12may be concave in the paraxial region.

The first lens11and the second lens12may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens11and the second lens12may be different from each other.

A stop ST may be disposed between the first lens11and the second lens12.

The third lens13may have positive refractive power, a first surface of the third lens13may be concave in a paraxial region, and a second surface of the third lens13may be convex in the paraxial region.

The second lens12and the third lens13may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens12and the third lens13may be different from each other.

The fourth lens14may have positive refractive power, and first and second surfaces of the fourth surface4may be convex in a paraxial region.

The fifth lens15may have negative refractive power, and first and second surfaces of the fifth lens15may be concave in a paraxial region.

The sixth lens16may have negative refractive power, and a first surface of the sixth lens16may be convex in a paraxial region, and a second surface of the sixth lens16may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first surface and the second surface of the sixth lens16. For example, the first surface of the sixth lens16may be convex in the paraxial region, and may be concave toward an edge. The second surface of the sixth lens16may be concave in the paraxial region and may be concave toward the edge.

Meanwhile, the fifth lens15and the sixth lens16may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens15and the sixth lens16may be different from each other. In addition, the Abbe number of the fifth lens15and the sixth lens16may be 22 or less.

Meanwhile, object side surfaces and image side surfaces of the first lens11to the sixth lens16may all be aspherical surfaces. For example, each surface of the first lens11to the sixth lens16may have an aspherical surface coefficient as shown in Table 3.

TABLE 3KABCDEFGHS10.3835170.509874−0.761661.228256−1.533641.315349−0.709220.214811−0.02765S215.759350.3917383.988743−32.3712136.6511−324.331424.4204−263.11345.62338S3−12.8954−0.05628−0.36079−0.794423.085484−22.695354.94171−47.99110S4990.17198−1.244511.07723−49.7164115.2839−143.35675.356610S5−35.18440.0676870.4219881.563292−4.953371.1940266.22432−4.547150S60.3548070.209891−1.038193.221125−0.79106−18.347548.3397−50.083919.27644S7−38.46990.126642−0.932392.884888−5.02125.27206−3.018270.6841770S82.7083380.584433−2.973257.83848−11.49328.588369−1.18423−2.302661.027511S90.1496780.615758−1.953223.856699−4.282511.1058872.554504−2.625880.763076S101.1122650.1874660.008211−0.451120.582211−0.363620.117567−0.01570S11−6.56077−0.12142−0.005550.03359−0.021940.007567−0.00138.8E−050S12−0.74052−0.247480.103115−0.037940.00942−0.001440.000105−1.6E−060

In addition, an optical imaging system thus configured may have aberration characteristics as shown inFIG.3.

Referring toFIGS.4and5, according to a second embodiment of the present disclosure, a first optical imaging system1may include an optical imaging system including a first lens21, a second lens22, a third lens23, a fourth lens24, a fifth lens25, and a sixth lens26, sequentially disposed from an object side, and may further include a filter27and an image sensor28.

The first lens21to the sixth lens26may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens21to the sixth lens26may be formed of a plastic material.

Table 4 shows lens characteristics (a radius of curvature, a thickness of a lens, a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 4RadiusThicknessRefrac-SurfaceofortiveAbbeFocalnumberReferencecurvatureDistanceindexnumberlengthS1First lens−8.1830.4041.54456.1−3.390S22.4330.414S3Second4.400880.2621.6521.59.820lensS413.5760.085S5Third lens−3.6670.5821.54456.12.582S6−1.0750.030S7Fourth5.6180.5461.54456.12.545lensS8−1.7820.049S9Fifth lens−2.380700.2201.66120.35−2.781S108.699140.835S11Sixth lens1.6640.5861.6521.572.707S121.4840.258S13FilterInfinity0.2101.51764.2S14Infinity0.621S15ImagingInfinity0.02000surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 2.14 mm, the angle of view FOV1 may be 117°, Fno1 may be 2.26, TTL1 may be 5.121 mm, and BFL1 may be 1.109 mm.

In the second embodiment of the first optical imaging system1, the first lens21may have negative refractive power, and first and second surfaces of the first lens21may be concave in a paraxial region.

In addition, at least one inflection point may be formed on the first surface of the first lens21. For example, the first surface of the first lens21may be concave in the paraxial region and may be convex toward an edge.

The second lens22may have positive refractive power, the first surface of the second lens22may be convex in the paraxial region, and the second surface of the second lens22may be concave in the paraxial region.

The first lens21and the second lens22may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens21and the second lens22may be different from each other.

The third lens23may have positive refractive power, a first surface of the third lens23may be concave in a paraxial region, and a second surface of the third lens23may be convex in the paraxial region.

The second lens22and the third lens23may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe numbers of the second lens22and the third lens23may be different from each other.

A stop ST may be disposed between the second lens22and the third lens23.

The fourth lens24may have positive refractive power, and first and second surfaces of the fourth lens24may be convex in a paraxial region.

The fifth lens25may have negative refractive power, and first and second surfaces of the fifth lens25may be concave in a paraxial region.

The sixth lens26may have positive refractive power, a first surface of the sixth lens26may be convex in a paraxial region, and a second surface of the sixth lens26may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens26. For example, the first surface of the sixth lens26may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens26may be concave in the paraxial region and may be convex toward the edge.

Meanwhile, the fifth lens25and the sixth lens26may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens25and the sixth lens26may be different from each other. In addition, the Abbe number of the fifth lens25and the sixth lens26may be 22 or less.

Meanwhile, object side surfaces and image side surfaces of the first lens21to the sixth lens26may all be aspherical surfaces. For example, respective surfaces of the first lens21to the sixth lens26may have aspherical surface coefficients as shown in Table 5.

TABLE 5KABCDEFGS100.417375−0.504160.630108−0.566810.333316−0.112940.017182S23.4370910.6815860.169306−6.3982440.46252−120.254185.2559−118.319S30−0.06345−0.560355.073793−57.4869277.9519−688674.4575S400.1208510.218756−3.1084720.29634−71.2031111.7326−65.5863S5−33.50670.1016660.42272−1.8990817.66911−59.581183.57319−42.803S60.419298−0.107360.81216−3.004899.711379−18.989121.22636−9.00593S7−252.971−0.058990.070133−0.738762.83771−4.786133.897587−1.24087S81.1566520.642046−2.230054.0212−4.578933.572002−1.879380.539453S910.82133−1.755152.578652−2.81322.044485−0.978170.244166S1000.1443030.22809−0.639090.550139−0.22410.040006−0.00164S11−8.7844−0.05242−0.094750.068483−0.025370.007137−0.001299.92E−05S12−0.81081−0.204220.059903−0.013040.0007710.000437−0.000131.08E−05

In addition, an optical imaging system thus configured may have aberration characteristics shown inFIG.5.

Referring toFIGS.6and7, according to a third embodiment of the present disclosure, the first optical imaging system1may include an optical system including a first lens31, a second lens32, a third lens33, a fourth lens34, a fifth lens35and a sixth lens36, sequentially disposed from an object side, and may further include a filter37and an image sensor38.

The first lens31to the sixth lens36may be disposed to be spaced from each other by a predetermined distance along an optical axis, respectively. The first lens31to the sixth lens36may be formed of a plastic material.

Table 6 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 6RadiusThicknessRefrac-SurfaceofortiveAbbeFocalnumberReferencecurvatureDistanceindexnumberlengthS1First lens−12.7070.3001.54456.1−3.362S22.1660.709S3Second1.632310.2921.61425.96.939lensS42.4500.197S5StopInfinity0.070S6Third lens4.0420.6531.54456.12.666S7−2.1490.070S8Fourth−12.2990.2201.67119.2−6.606lensS97.119240.134S10Fifth lens4.952000.7551.54456.12.083S11−1.3990.373S12Sixth lens1.3410.3001.61425.9−3.106S130.722720.257S14FilterInfinity0.2101.51764.2S15Infinity0.620S16ImagingInfinity0.02000surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 1.837 mm, the angle of view FOV1 may be 117.8°, Fno1 may be 2.25, TTL1 may be 5.18 mm and, BFL1 may be 0.85 mm.

In a third embodiment of the first optical imaging system1, the first lens31may have negative refractive power, and first and second surfaces of the first lens31may be concave in a paraxial region.

At least one inflection point may be formed on the first surface of the first lens31. For example, the first surface of the first lens31may be concave in the paraxial region and may be convex toward an edge.

The second lens32may have positive refractive power, a first surface of the second lens32may be convex in the paraxial region and a second surface of the second lens32may be concave in the paraxial region.

The first lens31and the second lens32may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens31and the second lens32may be different from each other.

The third lens33may have positive refractive power, and first and second surfaces of the third lens33may be convex in a paraxial region.

The second lens32and the third lens33may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens32and the third lens33may be different from each other.

A stop ST may be disposed between the second lens32and the third lens33.

The fourth lens34may have negative refractive power, first and second surfaces of the fourth lens34may be concave in a paraxial region.

The fifth lens35may have positive refractive power, first and second surfaces of the fifth lens35may be convex in a paraxial region.

The sixth lens36may have negative refractive power, and a first surface of the sixth lens36may be convex in a paraxial region and a second surface of the sixth lens36may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens36. For example, the first surface of the sixth lens36may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens36may be concave in the paraxial region and may be convex toward the edge.

Meanwhile, the fifth lens35and the sixth lens36may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens35and the sixth lens36may be different from each other. In addition, the Abbe number of the sixth lens36may be 26 or less.

Meanwhile, object side surfaces and image side surfaces of the first lens31to the sixth lens36may all be aspherical surfaces. For example, each surface of the first lens31to the sixth lens36may have an aspherical surface coefficient as shown in Table 7.

TABLE 7KABCDEFGHS100.37507−0.454400.48627−0.381040.20497−0.070640.01400−0.00121S20.515640.47998−0.520980.57001−0.395380.09559000S3−2.93220−0.00537−0.14092−0.602181.28988−0.65548000S49.17220−0.05165−0.28642−0.011591.51178−1.11276000S619.98604−0.010470.03335−0.228070.176260000S73.744950.05373−3.0247515.96820−49.5265988.38501−88.1716643.81596−7.03388S8139.068890.02332−3.3345315.66493−43.8782375.23525−84.7983960.08267−19.54198S900.01770−1.657506.21598−12.6331715.11076−10.812194.41980−0.80714S10−15.570410.05751−0.654901.46125−1.693791.09038−0.380110.06401−0.00357S11−0.525000.012030.29322−0.765741.04146−0.759640.31025−0.067840.00625S12−16.35061−0.397240.119900.08823−0.114800.05442−0.011520.000730.00004S13−4.77091−0.280410.21129−0.113090.04180−0.010750.00184−0.000190.00001

The optical imaging system thus configured may have aberration characteristics as shown inFIG.7.

Referring toFIGS.8and9, according to a fourth embodiment of the present disclosure, a first optical imaging system1may include an optical imaging system including a first lens41, a second lens42, a third lens43, a fourth lens44, a fifth lens45, and a sixth lens46, and may further include a filter47and an image sensor48.

The first lens41to the sixth lens46may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens41to the sixth lens46may be formed of a plastic material.

Table 8 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, and an Abbe number) of each lens.

TABLE 8RadiusThicknessRefrac-SurfaceRefer-ofortiveAbbeFocalnumberencecurvatureDistanceindexnumberlengthS1First−79.9070.3001.54456.1−3.354lensS21.8790.859S3Second1.554130.3741.61425.95.771lensS42.4950.287S5StopInfinity0.070S6Third4.7670.6421.54456.12.544lensS7−1.8700.173S8Fourth−2.6460.2201.67119.2−4.024lensS9−85.119100.128S10Fifth10.223930.8691.54456.13.294lensS11−2.1200.338S12Sixth0.9820.5171.61425.9499.988lensS130.786460.422S14FilterInfinity0.1101.51764.2S15Infinity0.520S16ImagingInfinity0.01955surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 1.804 mm, FOV1 may be 121.4°, Fno1 may be 1.97, TTL1 may be 5.85 mm, and, BFL1 may be 1.072 mm.

In a fourth embodiment of the first optical imaging system1, the first lens41may have negative refractive power, and first and second surfaces of the first lens41may be concave in a paraxial region.

In addition, at least one inflection point may be formed on the first surface of the first lens41. For example, the first lens41may be concave in the paraxial region and may be convex toward an edge.

The second lens42may have positive refractive power, a first surface of the second lens42may be convex in a paraxial region, and a second surface of the second lens42may be concave in the paraxial region.

The first lens41and the second lens42may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens41and the second lens42may be different from each other.

The third lens43may have positive refractive power, and first and second surfaces of the third lens43may be convex in a paraxial region.

The second lens42and the third lens43may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens42and the third lens43may be different from each other.

A stop ST may be disposed between the second lens42and the third lens43.

The fourth lens44may have negative refractive power, a first surface of the fourth lens44may be concave in a paraxial region, and a second surface of the fourth lens44may be convex in the paraxial region.

The fifth lens45may have positive refractive power, and first and second surfaces of the fifth lens45may be convex in a paraxial region.

The sixth lens46may have positive refractive power, and a first surface of the sixth lens46may be convex in a paraxial region, and a second surface of the sixth lens46may be concave in the paraxial region.

In addition, at least one inflection point may be formed on first and second surfaces of the sixth lens46. For example, the first surface of the sixth lens46may be convex in a paraxial region and may be concave toward an edge. The second surface of the sixth lens46may be concave in the paraxial region and may be convex toward the edge.

Meanwhile, the fifth lens45and the sixth lens46may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens45and the sixth lens46may be different from each other. In addition, the Abbe number of the sixth lens46may be 26 or less.

Meanwhile, object side surfaces and image side surfaces of the first lens41to the sixth lens46may all be aspherical surfaces. For example, each surface of the first lens41to the sixth lens46may have an aspherical surface coefficient as shown in Table 9.

TABLE 9KABCDEFGHS100.13461−0.112750.07155−0.033020.01064−0.002250.00028−0.00002S2−0.123800.15303−0.120860.04324−0.00701−0.00075000S30.36526−0.009890.04598−0.163140.30176−0.13581000S49.747530.041190.04536−0.185940.70953−0.32574000S616.55517−0.023660.07207−0.228460.196890000S72.41508−0.08211−0.566273.77134−13.6530828.03459−33.6466822.16565−6.01660S84.88732−0.27254−0.368652.15281−2.91809−3.8560913.73763−12.045323.44030S90−0.17059−0.511072.45925−4.809915.08864−3.019880.99032−0.14835S10−15.572780.01072−0.399351.00426−1.272550.92269−0.393240.09455−0.01042S110.31182−0.388540.98521−1.601001.72351−1.143970.45209−0.097790.00890S12−5.15036−0.197410.038870.01071−0.00269−0.004020.00219−0.000410.00003S13−3.18332−0.169640.09686−0.041710.01326−0.003060.00047−0.000040.00000

In addition, the optical imaging system thus configured may have aberration characteristics shown inFIG.9.

Referring toFIGS.10and11, according to a fifth embodiment of the present disclosure, a first optical imaging system1may include an optical system including a first lens51, a second lens52, a third lens53, a fourth lens54, a fifth lens55, and a sixth lens56, sequentially disposed from an object side, and may further include a filter57and an image sensor58.

The first lens51to the sixth lens56may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens51to the sixth lens56may be formed of a plastic material.

Table 10 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 10SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens−27.8340.3001.54456.1−2.051S21.1720.400S3Second1.570570.6281.61425.93.649lensS44.3500.264S5Third lens5.065810.7941.54456.11.975S6−1.2950.030S7Fourth−1.7360.2301.67119.2−7.907lensS8−2.7020.379S9Fifth lens−3.416130.9501.54456.12.375S10−1.033160.030S11Sixth lens1.8930.5211.61425.9−3.608S120.9170.418S13FilterInfinity0.1101.51764.2S14Infinity0.801S15ImagingInfinity0.01955surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 1.804 mm, an angle of view FOV1 may be 126.9°, Fno1 may be 1.97, TTL1 may be 5.875 mm, and BFL1 may be 1.348 mm.

In a fifth embodiment of the first optical imaging system1, the first lens51may have negative refractive power, and first and second surfaces of the first lens51may be concave in a paraxial region.

In addition, at least one inflection point may be formed on the first surface of the first lens51. For example, the first surface of the first lens51may be concave in the paraxial region and may be convex toward an edge.

The second lens52may have positive refractive power, a first surface of the second lens52may be convex in a paraxial region, and a second surface of the second lens52may be concave in the paraxial region.

The first lens51and the second lens52may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens51and the second lens52may be different from each other.

The third lens53may have positive refractive power, and first and second surfaces of the third lens53may be convex in a paraxial region.

The second lens52and the third lens53may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens52and the third lens53may be different from each other.

A stop ST may be disposed between the second lens52and the third lens53.

The fourth lens54may have negative refractive power, a first surface of the fourth lens54may be concave in a paraxial region, and a second surface of the fourth lens54may be convex in the paraxial region.

The fifth lens55may have positive refractive power, a first surface of the fifth lens55may be concave in a paraxial region, and a second surface of the fifth lens55may be convex in the paraxial region.

The sixth lens56may have negative refractive power, a first surface of the sixth lens56may be convex, in a paraxial region and a second surface of the sixth lens56may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens56. For example, the first surface of the sixth lens56may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens56may be concave in the paraxial region and may be convex toward the edge.

Meanwhile, the fifth lens55and the sixth lens56may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens55and the sixth lens56may be different from each other. In addition, the Abbe number of the sixth lens56may be 26 or less.

Meanwhile, at least one of object side surfaces and image side surfaces of the first lens51to the sixth lens56may be an aspherical surface. For example, each surface of the first lens51to the sixth lens56may have an aspherical surface coefficient as shown in Table 11.

TABLE 11KABCDEFGS100.065483−0.039680.021116−0.007290.001519−0.000178.24E−06S20−0.090970.395797−1.450632.964288−3.522092.314678−0.64529S30−0.041630.200214−0.630451.68779−2.443132.013245−0.71923S400.221164−0.442545.02223−23.366566.00539−96.524457.78121S550.82239−0.028511.221194−12.110164.87433−197.804313.9412−205.553S600000000S70−0.14895−0.641993.174452−4.72626−0.081985.943744−3.70163S800.057288−0.435141.089528−0.988370.108790.448187−0.21469S9−13.81440.197387−0.364660.38509−0.238480.090741−0.019380.001674S10−0.747560.329506−0.481810.538028−0.394670.181283−0.044730.004471S110−0.1697−0.100390.104605−0.051560.011925−0.00046−0.00014S12−4.28179−0.07105−0.006680.016414−0.00790.001912−0.000241.2E−05

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.11.

Referring toFIGS.12and13, according to a sixth embodiment of the present disclosure, a first optical imaging system1may include an optical system including a first lens61, a second lens62, a third lens63, a fourth lens64, a fifth lens65, and a sixth lens66, sequentially disposed from an object side, and may further include a filter67and an image sensor68.

The first lens61to the sixth lens66may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens61to the sixth lens66may be formed of a plastic material.

Table 12 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 12SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens−76.3190.3001.54456.1−2.296S21.2770.457S3Second2.071160.4381.63923.56.199lensS43.9370.455S5Third lens3.690640.8661.54456.11.996S6−1.4200.104S7Fourth17.5520.3641.66120.35−5.530lensS83.0290.242S9Fifth lens−9.148910.9501.54456.12.168S10−1.087590.151S11Sixth lens1.9410.4321.61425.9−3.430S120.9280.418S13FilterInfinity0.1101.51764.2S14Infinity0.716S15ImagingInfinity0.01446surface

Meanwhile, in the first optical imaging system1, the total focal length F1 may be 1.8 mm, an angle of view (FOV1) may be 127.1°, Fno1 may be 2.17, TTL1 may be 6.018 mm, and BFL1 may be 1.259 mm.

In a sixth embodiment of the first optical imaging system1, the first lens61may have negative refractive power, and first and second surfaces of the first lens61may be concave in a paraxial region.

In addition, at least one inflection point may be formed on the first surface of the first lens61. For example, the first surface of the first lens61may be concave in a paraxial region and may be convex toward an edge.

The second lens62may have positive refractive power, a first surface of the second lens62may be convex in a paraxial region, and a second surface of the second lens62may be concave in the paraxial region.

The first lens61and the second lens62may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens61and the second lens62may be different from each other.

The third lens63may have positive refractive power, first and second surfaces of the third lens63may be convex in the paraxial region.

The second lens62and the third lens63may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens62and the third lens63may be different from each other.

A stop ST may be disposed between the second lens62and the third lens63.

The fourth lens64may have negative refractive power, a first surface of the fourth lens64may be convex in a paraxial region, and a second surface of the fourth lens64may be concave in the paraxial region.

The fifth lens65may have positive refractive power, a first surface of the fifth lens65may be concave in a paraxial region, and a second surface of the fifth lens65may be convex in the paraxial region.

The sixth lens66may have negative refractive power, a first surface of the sixth lens66may be convex, and a second surface of the sixth lens66may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens66. For example, the first surface of the sixth lens66may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens66may be concave in the paraxial region and may be convex toward the edge.

Meanwhile, the fifth lens65and the sixth lens66may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the fifth lens65and the sixth lens66may be different from each other. In addition, the Abbe number of the sixth lens66may be 26 or less.

Meanwhile, object side surfaces and image side surfaces of the first lens61to the sixth lens66may all be aspherical surfaces. For example, each surface of the first lens61to the sixth lens66may have an aspherical surface coefficient as shown in Table 13.

TABLE 13KABCDEFGS100.068509−0.031630.013978−0.004170.000691−4.7E−050S20−0.03209−0.013920.174166−0.35080.365799−0.136590S30−0.063310.139087−0.036440.104628−0.0792300S400.1124580.027360.780831−1.340470.93665200S55.827832−0.047230.411412−2.810446.648248−5.55443−3.432720S61.481986−0.380111.542717−3.57065.197627−4.527951.7855040S70−0.71411.581408−2.884023.42128−2.621290.840990S8−11.3523−0.262060.299755−0.180790.0465210.001724−0.00240S9−89.08460.129618−0.284230.296445−0.162880.049159−0.006640S10−0.716230.241603−0.260910.23643−0.139750.049332−0.007070S110−0.2570.031918−0.020820.02795−0.016580.004655−0.0005S12−4.07704−0.119870.034196−0.00521−0.000450.000345−5.6E−053.28E−06

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.13.

Hereinafter, a second optical imaging system2will be described with reference toFIGS.14to20.

The second optical imaging system2may satisfy at least one of the following conditional expressions.
Fno2<1.7  [Conditional Expression 17]
TTL2/ImgH2<2.0  [Conditional Expression 18]
70°≤FOV2  [Conditional Expression 19]
−1.0<(R11_2+R12_2)/(R11_2−R12_2)<1.0  [Conditional Expression 20]
−1.0<(R9_2−R10_2)/(R9_2+R102)<1.0  [Conditional Expression 21]
35<v1_2−v2_2  [Conditional Expression 22]
−31<v3_2−v4_2  [Conditional Expression 23]
1.5<Th1_2/Sag1_2  [Conditional Expression 24]
55<v7_2  [Conditional Expression 25]
1.66<Nd2_2  [Conditional Expression 26]
1.65≤Nd5_2  [Conditional Expression 27]
1.61<Nd6_2  [Conditional Expression 28]
1.60<(Nd2_2+Nd5_2+Nd6_2)/3<1.66  [Conditional Expression 29]
1.59<(Nd2_2+Nd3_2+Nd4_2+Nd5_2+Nd6_2)/5<1.61  [Conditional Expression 30]
50<|f5_2/F2|  [Conditional Expression 31]
50<|f6_2/F2|  [Conditional Expression 32]

Fno2 may be a number (f-number) representing brightness of the second optical imaging system2, TTL2 may be a distance from an object side surface of a first lens of the second optical imaging system2to an imaging surface of an image sensor, F2 may be a total focal length of the second optical imaging system2, ImgH2 may be ½ of a diagonal length of the imaging surface of the image sensor of the second optical imaging system2, FOV2 may be an angle of view of the second optical imaging system2, R9_2 may be a radius of curvature of an object side surface of the fifth lens of the second optical imaging system2, R10_2 may be a radius of curvature of an image side surface of the fifth lens of the second optical imaging system2, R11_2 may be a radius of curvature of an object side surface of the sixth lens of the second optical imaging system2, R12_2 may be a radius of an image side surface of the sixth lens of the second optical imaging system2, v1_2 may be an Abbe number of the first lens of the second optical imaging system2, v2_2 may be an Abbe number of the second lens of the second optical imaging system2, v3_2 may be an Abbe number of the third lens of the second optical imaging system2, v4_2 may be an Abbe number of the fourth lens of the second optical imaging system2, v7_2 may be an Abbe number of the seventh lens of the second optical imaging system2, Th1_2 may be a center thickness of the first lens of the second optical imaging system2, Sag1_2 may be a distance in the optical axis direction from the end of an effective surface of the object side surface of the first lens of the second optical imaging system2to an apex of the effective surface of the object side surface of the first lens, Nd2_2 may be a refractive index of the second lens of the second optical imaging system2, Nd5_2 may be a refractive index of the fifth lens of the second optical imaging system2, Nd6_2 may be a refractive index of the sixth lens of the second optical imaging system2, f5_2 may be a focal length of the fifth lens of the second optical imaging system2, and f6_2 may be a focal length of the sixth lens of the second optical imaging system2.

Meanwhile, the effective surface may mean a portion in which light actually impinges on each surface of the lens.

Referring toFIGS.14and15, according to a first embodiment of the present disclosure, the second optical imaging system2may include an optical system including a first lens110, a second lens120, a third lens130, a fourth lens140, a fifth lens150, a sixth lens160and a seventh lens170sequentially disposed from an object side, and may further include an infrared block filter180(hereinafter referred to as a ‘filter’) and an image sensor190.

The first lens110to the seventh lens170may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens110to the seventh lens170may be formed of a plastic material.

Table 14 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 14SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.83010.77201.54456.14.470S26.29910.1447S3Second8.27290.20001.66120.4−9.660lensS43.56910.1696S5Third lens3.73110.33371.54456.1173.727S63.76200.0470S7Fourth lens2.66220.23001.54456.19.811S85.15000.4686S9Fifth lens−1000.0000.31091.66120.412226873.6S10−1000.0000.1970S11Sixth lens1000.0000.56681.63923.5782.559S12−1000.0000.1428S13Seventh1.68800.53531.53455.7−11.283lensS141.17300.2666S15FilterInfinity0.11001.51864.2S16Infinity0.6800S17ImagingInfinity0.0100surface

Meanwhile, in the second optical imaging system2, the total focal length F2 may be 4.3 mm, the angle of view FOV2 may be 76.72°, Fno2 may be 1.57, TTL2 may be 5.185 mm, and BFL2 may be 1.067 mm.

Here, BFL2 may be a distance from an image side surface of the seventh lens170to an imaging surface of the image sensor190.

In a first embodiment of the second optical imaging system2, the first lens110may have positive refractive power, a first surface of the first lens110may be convex in a paraxial region, and a second surface of the first lens110may be concave in the paraxial region.

The second lens120may have negative refractive power, a first surface of the second lens120may be convex in a paraxial region, and a second surface of the second lens120may be concave in the paraxial region.

The first lens110and the second lens120may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens110and the second lens120may be different from each other.

The third lens130may have positive refractive power, a first surface of the third lens130may be convex in a paraxial region, and a second surface of the third lens130may be concave in the paraxial region.

The second lens120and the third lens130may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens120and the third lens130may be different from each other.

A stop ST may be disposed between the second lens120and the third lens130.

The fourth lens140may have positive refractive power, a first surface of the fourth lens140may be convex in a paraxial region, and a second surface of the fourth lens140may be concave in the paraxial region.

The fifth lens150may have positive refractive power, a first surface of the fifth lens150may be concave in a paraxial region, and a second surface of the fifth lens150may be convex in the paraxial region.

The sixth lens160may have positive refractive power, first and second surfaces of the sixth lens160may be convex in a paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens160. For example, the first surface of the sixth lens160may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens160may be convex in the paraxial region and may be concave toward the edge.

The seventh lens170may have negative refractive power, a first surface of the seventh lens170may be convex in a paraxial region, and a second surface of the seventh lens170may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the seventh lens170. For example, the first surface of the seventh lens170may be convex in the paraxial region and may be concave toward an edge. The second surface of the seventh lens170may be concave in the paraxial region and may be convex toward the edge.

The second optical imaging system2may include a plurality of lenses having a high refractive index. For example, the second lens120, the fifth lens150, and the sixth lens160may have a refractive power of 1.6 or more. For example, the refractive index of the second lens120and the fifth lens150may be equal to or greater than 1.65 and less than 1.75, and the refractive index of the sixth lens160may be greater than 1.61.

The fifth lens150and the sixth lens160of the second optical imaging system2may have a considerably elongated focal length. For example, an absolute value of a focal length f5_2 of the fifth lens150and an absolute value of a focal length f6_2 of the sixth lens160may be 200 or more.

Meanwhile, object side surfaces and image side surfaces of the first lens110to the seventh lens170may all be aspherical surfaces. For example, each surface of the first lens110to the seventh lens170may have an aspherical surface coefficient as shown in Table 15.

TABLE 15KABCDEFGHJS1−1.6550.0120.097−0.3160.610−0.7410.564−0.2620.068−0.007S2−24.000−0.013−0.0360.041−0.0430.043−0.0360.021−0.0070.001S3−50.687−0.039−0.0310.0000.220−0.4420.448−0.2550.079−0.010S44.824−0.043−0.0630.151−0.3830.818−1.0510.767−0.2880.042S5−12.799−0.0080.162−0.9392.417−3.9624.125−2.5900.900−0.134S6−42.892−0.1080.317−0.8511.291−1.5491.597−1.1380.454−0.075S7−0.353−0.2370.581−1.6633.444−5.2975.688−3.8341.427−0.223S8−4.250−0.025−0.0420.311−1.0131.759−1.8091.126−0.3970.061S90.0000.083−0.8112.302−4.1845.047−4.0492.072−0.6100.078S100.0000.263−1.1392.072−2.4441.918−0.9910.323−0.0600.005S110.0000.463−1.1121.591−1.6061.086−0.4770.130−0.0200.001S120.0000.146−0.1700.112−0.0630.029−0.0090.0020.0000.000S13−10.824−0.2010.0530.010−0.0090.0020.0000.0000.0000.000S14−5.597−0.1360.063−0.0250.008−0.0010.0000.0000.0000.000

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.15.

Referring toFIGS.16and17, according to a second embodiment of the present disclosure, a second optical imaging system2may include an optical system including a first lens210, a second lens220, a third lens230, a fourth lens240, a fifth lens250, a sixth lens260and a seventh lens270, and may further include an infrared block filter280(hereinafter referred to as a ‘filter’) and an image sensor290.

The first lens210to the seventh lens270may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens210to the seventh lens270may be formed of a plastic material.

Table 16 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 17SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.83080.77521.54456.14.475S26.28240.0847S3Second6.86100.20001.66120.4−9.598lensS43.25800.1828S5Third lens3.29150.34771.54456.155.807S63.55440.0538S7Fourth lens2.82340.23001.54456.111.039S85.17570.4972S9Fifth lens−1000.0000.32741.65021.511926835.3S10−1000.0000.1660S11Sixth lens1000.0000.58001.61426.0814.422S12−1000.0000.1257S13Seventh1.82100.57501.53755.7lensS141.22280.2594S15FilterInfinity0.11001.51864.2S16Infinity0.6413S17ImagingInfinity0.0100surface

Meanwhile, in the second optical imaging system2, the total focal length F2 may be 4.31 mm, the angle of view FOV2 may be 76.5°, Fno2 may be 1.57, TTL2 may be 5.166 mm, and BFL2 may be 1.021 mm.

In a second embodiment of the second optical imaging system2, a first surface of the first lens210may be convex in a paraxial region, and a second surface of the first lens210may be concave in the paraxial region.

The second lens220may have negative refractive power, the first surface of the second lens220may be convex in a paraxial region, and the second surface of the second lens220may be concave in the paraxial region.

The first lens210and the second lens220may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens210and the second lens220may be different from each other.

The third lens230may have positive refractive power, a first surface of the third lens230may be convex in a paraxial region, and a second surface of the third lens230may be concave in the paraxial region.

The second lens220and the third lens230may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of second lens220and the third lens230may be different from each other.

A stop ST may be disposed between the second lens220and the third lens230.

The fourth lens240may have positive refractive power, a first surface of the fourth lens240may be convex in a paraxial region, and a second surface of the fourth lens240may be concave in the paraxial region.

The fifth lens250may have positive refractive power, a first surface of the fifth lens250may be concave in a paraxial region, and a second surface of the fifth lens250may be convex in the paraxial region.

The sixth lens260may have positive refractive power, and first and second surfaces of the sixth lens260may be convex in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens260. For example, the first surface of the sixth lens260may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens260may be convex in the paraxial region and may be concave toward the edge.

The seventh lens270may have negative refractive power, a first surface of the seventh lens270may be convex in a paraxial region, and a second surface of the seventh lens270may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the seventh lens270. For example, the first surface of the seventh lens270may be convex in the paraxial region and may be concave toward an edge. The second surface of the seventh lens270may be concave in the paraxial region and may be convex toward the edge.

The second optical imaging system2may have a plurality of lenses having a high refractive index. For example, the second lens220, the fifth lens250and the sixth lens260may have a refractive index of 1.6 or more. For example, the refractive indexes of the second lens220and the fifth lens250may be equal to or greater than 1.65 and less than 1.75, and the refractive index of the sixth lens260may be greater than 1.61.

In the second optical imaging system2, the fifth lens250and the sixth lens260may have a considerably elongated focal length. For example, an absolute value of a focal length f5_2 of the fifth lens250and an absolute value of a focal length f6_2 of the sixth lens260may be 200 or more.

Meanwhile, object side surfaces and image side surfaces of the first lens210to the seventh lens270may all be aspherical surfaces. For example, each surface of the first lens210to the seventh lens270may have an aspherical surface coefficient as shown in Table 17.

TABLE 17KABCDEFGHJS1−1.6560.0170.061−0.1910.345−0.3910.276−0.1180.028−0.003S2−29.5490.024−0.1750.227−0.1400.0130.039−0.0280.008−0.001S3−31.0580.029−0.2350.2360.178−0.6200.643−0.3460.097−0.011S44.2850.005−0.1640.0360.643−1.6052.015−1.4690.592−0.102S5−11.8420.0130.094−0.7912.300−4.2094.814−3.2821.228−0.195S6−43.654−0.0820.324−1.2893.146−5.8767.418−5.5932.264−0.380S7−0.420−0.2230.589−1.9745.123−9.88112.421−9.2653.709−0.615S8−2.376−0.029−0.0640.429−1.0931.409−1.0040.404−0.0910.011S90.0000.107−1.1223.496−6.7538.525−7.0723.709−1.1140.146S100.0000.397−1.7613.408−4.1963.399−1.7960.594−0.1110.009S110.0000.623−1.6002.343−2.3771.623−0.7240.201−0.0310.002S120.0000.220−0.2720.168−0.0720.023−0.0050.0010.0000.000S13−10.608−0.1980.077−0.0120.0000.0000.0000.0000.0000.000S14−6.924−0.1020.029−0.0050.0000.0000.0000.0000.0000.000

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.17.

Referring toFIGS.18and19, according to a third embodiment of the present disclosure, a second optical imaging system2may include an optical system including a first lens310, a second lens320, a third lens330, a fourth lens340, a fifth lens350, a sixth lens360and a seventh lens370, sequentially disposed from an object side, and may further include an infrared block filter380(hereinafter referred to as a ‘filter’) and an image sensor390.

The first lens310to the seventh lens370may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens310to the seventh lens370may be formed of a plastic material.

Table 18 illustrates lens characteristics (a radius of curvature, a thickness of a lens, a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 18SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.8420.8791.54456.13.999S29.9860.127S3Second13.5140.2001.66120.4−6.959lensS43.4120.182S5Third lens3.7100.2911.54456.1−223.645S63.5010.089S7Fourth lens2.6010.3171.54456.17.552S86.7810.460S9Fifth lens−1000.0000.2691.65021.514493820.8S10−1000.0000.176S11Sixth lens1000.0000.5971.61426.0814.425S12−1000.0000.076S13Seventh1.9090.5051.53755.7−9.34lensS141.2550.236S15FilterInfinity0.1101.51864.2S16Infinity0.641S17ImagingInfinity0.010surface

Meanwhile, in the second optical imaging system2, the total focal length F2 may be 4.29 mm, the angle of view FOV2 may be 76.46°, Fno2 may be 1.55, TTL2 may be 5.166 mm, and BFL2 may be 0.997 mm.

In a third embodiment of the second optical imaging system2, the first lens310may have positive refractive power, a first surface of the first lens310may be convex in a paraxial region, and a second surface of the first lens310may be concave in the paraxial region.

The second lens320may have negative refractive power, a first surface of the second lens320may be convex in a paraxial region, and a second surface of the second lens320may be concave in the paraxial region.

The first lens310and the second lens320may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens310and the second lens320may be different from each other.

The third lens330may have negative refractive power, a first surface of the third lens330may be convex in a paraxial region, and a second surface of the third lens330may be concave in the paraxial region.

The second lens320and the third lens330may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens320and the third lens330may be different from each other.

The fourth lens340may have positive refractive power, a first surface of the fourth lens340may be convex in a paraxial region, and a second surface of the fourth lens340may be concave in the paraxial region.

The fifth lens350may have positive refractive power, a first surface of the fifth lens350may be concave in a paraxial region, and a second surface of the fifth lens350may be convex in the paraxial region.

The sixth lens360may have positive refractive power, first and second surfaces of the sixth lens360may be convex in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens360. For example, the first surface of the sixth lens360may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens360may be convex in the paraxial region and may be concave toward the edge.

The seventh lens370may have negative refractive power, a first surface of the seventh lens370may be convex in the paraxial region, and a second surface of the seventh lens370may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the seventh lens370. For example, the first surface of the seventh lens370may be convex in the paraxial region and may be concave toward the edge. The second surface of the seventh lens370may be concave in the paraxial region and may be convex toward the edge.

The second optical imaging system2may include a plurality of lenses having a high refractive index. For example, the second lens320, the fifth lens350and the sixth lens360may have a refractive index of 1.6 or more. For example, the refractive indexes of the second lens320and the fifth lens350may be equal to or greater than 1.65 and less than 1.75, and the refractive index of the sixth lens360may be greater than 1.61.

In the second optical imaging system2, the fifth lens350and the sixth lens360may have a considerably elongated focal length. For example, an absolute value of a focal length f5_2 of the fifth lens350and an absolute value of a focal length f6_2 of the sixth lens360may be 200 or more.

Meanwhile, object side surfaces and image side surfaces of the first lens310to the seventh lens370may all be aspherical surfaces. For example, each surface of the first lens310to the seventh lens370may have an aspherical surface coefficient as shown in Table 19.

TABLE 19KABCDEFGHJS1−1.4620.0130.061−0.1720.294−0.3170.216−0.0900.021−0.002S2−17.911−0.014−0.0680.144−0.1860.173−0.1210.058−0.0160.002S3−86.751−0.039−0.0860.224−0.2220.132−0.0680.039−0.0150.002S44.714−0.039−0.046−0.0310.481−1.1881.542−1.1670.490−0.088S5−12.795−0.0030.041−0.082−0.2100.766−1.0860.789−0.2730.034S6−29.088−0.1200.394−1.1262.317−3.5273.656−2.4210.933−0.159S7−1.084−0.2200.409−1.0131.921−2.6232.393−1.3840.469−0.072S8−31.367−0.022−0.0350.0020.091−0.2090.203−0.0910.0120.002S90.0000.126−0.9312.533−4.4885.319−4.2232.151−0.6360.083S100.0000.366−1.5332.855−3.4302.735−1.4300.467−0.0860.007S110.0000.527−1.3771.940−1.9261.304−0.5780.159−0.0240.002S120.0000.243−0.3880.308−0.1670.065−0.0180.0030.0000.000S13−8.977−0.2170.0560.022−0.0190.006−0.0010.0000.0000.000S14−6.875−0.1330.049−0.0100.0010.0000.0000.0000.0000.000

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.19.

Table 20 shows conditional expression values of the second optical imaging system2according to each embodiment.

TABLE 20FirstSecondThirdembodimentembodimentembodimentof secondof secondof secondopticalopticalopticalimagingimagingimagingsystemsystemsystemFno1.571.571.55TTL/ImgH21.481.481.48F24.304.314.29FOV276.7276.5076.46(R12_2 + R13_2)/0.000.000.00(R12_2 − R13_2)(R8_2 − R9_2)/0.000.000.00(R8_2 + R9_2)v1_2-v2_235.7435.7435.74v3_2-v4_20.000.00−30.14Th1_2/Sag1_21.541.531.61v7_255.6655.6655.66Nd2_21.661.661.66Nd5_21.661.651.65Nd6_21.641.611.61

Hereinafter, a third optical imaging system3will be described with reference toFIGS.21to29.

The third optical imaging system3may satisfy at least one of the following conditional expressions.
0.7<TTL3/F3<1.0  [Conditional Expression 33]
0.15<R1_3/F3<0.32  [Conditional Expression 34]
−3.5<F3/f2_3<−0.5  [Conditional Expression 35]
0.1<d45_3/TTL3<0.7  [Conditional Expression 36]
1.6<Nd6_3<1.75  [Conditional Expression 37]
0.3<tan θ_3<0.5  [Conditional Expression 38]
2.0<Fno3<2.7  [Conditional Expression 39]

TTL3 may be a distance from an object side surface of the first lens of the third optical imaging system3to an imaging surface of the image sensor, F3 may be the total focal length of the third optical imaging system3, f2_3 may be a focal length of the second lens of the third optical imaging system3, R1_3 may be the radius of curvature of the object side surface of the first lens of the third optical imaging system3, d45_3 may be a distance from the image side surface of the fourth lens of the third optical imaging system3to the object side surface of the fifth lens, Nd6_3 may be a refractive index of the sixth lens of the third optical imaging system3, θ_3 may be the half angle of view of the third optical imaging system3, and Fno3 may be a number (f-number) representing brightness of the third optical imaging system3.

The conditional expression 33 may be a condition for miniaturizing the third optical imaging system3. For example, when an upper limit value of the conditional expression 33 is exceeded, it is difficult to be miniaturized, and thus is difficult to be mounted on portable electronic devices, and when a lower limit value of the conditional expression 33 is exceeded, it is difficult to be manufactured.

The conditional expression 34 may be a condition for manufacturing a first lens for constructing the angle of view of the third optical imaging system3to be relatively narrow. For example, the first lens, which exceeds the upper limit value of the conditional expression 34, may increase longitudinal spherical aberration and shorten the focal length of the third optical imaging system3, and the first lens, which exceeds the lower limit value of the conditional expression 34, may increase the focal length of the third optical imaging system3, but the lens may be difficult to be manufactured. Further, the first lens, which exceeds the lower limit value of the conditional expression 34, may have a thinner thickness in a lens edge portion, making it difficult to be manufactured.

The conditional expression 35 may be a design condition of the second lens for realizing high resolution. For example, the second lens, which exceeds a numerical value of the conditional expression 35, may increase astigmatism of the third optical imaging system3to cause image deterioration.

Conditional expression 36 may be a design condition for constructing the angle of view of the third optical imaging system3to be relatively narrow. For example, when the lower limit value of the conditional expression 35 is exceeded, the focal length may be short and it is difficult to use for telephoto. When the upper limit value of the conditional expression 36 is exceeded, the total focal length TTL of the third optical imaging system3may become large and it is difficult to be miniaturized.

Conditional expression 37 may be a design condition of the sixth lens for realizing high resolution. For example, the sixth lens satisfying the numerical range of the conditional expression 37 may have a low Abbe number of 26 or less, such that it is advantageous in correcting astigmatism, longitudinal chromatic aberration, and magnification aberration.

Conditional expression 38 may be the angle of view of the third optical imaging system3, and conditional expression 39 may be a numerical range of Fno3 for realizing high resolution.

In the third optical imaging system3, the refractive power of the lens (the reciprocal of the absolute value of the focal length) may be disposed in a predetermined order. As an example, the refractive power of the odd-numbered lens may be greater than the refractive power of the even-numbered lens disposed on the image side. For example, the refractive power of the first lens may be greater than the refractive power of the second lens, the refractive power of the third lens may be greater than the refractive power of the fourth lens, and the refractive power of the fifth lens may be greater than the refractive power of the sixth lens.

In the third optical imaging system, a lens having the largest refractive power may be disposed close to an object side, a lens having the smallest refractive power may be disposed close to an image side. For example, the first lens of the third optical imaging system3may have the largest refractive power, and the fourth lens or the sixth lens may have the smallest refractive power.

In the third optical imaging system3, the first lens may have the most convex surface. For example, the object side surface of the first lens may be the most convex surface among the surfaces of each lens. In the third optical imaging system3, the second lens may have the most concave surface. For example, the image side surface of the second lens may be the most concave surface. In the third optical imaging system3, the fourth lens may have a generally flat surface. For example, the image side surface of the fourth lens may be a shape close to a plane.

In the third optical imaging system3, three or more lenses adjacent to each other may have substantially similar refractive indexes. For example, the second lens to the fourth lens may have substantially the same or similar refractive index. The refractive index of the second lens to the fourth lens may be selected in the range of 1.63 to 1.68.

Referring toFIGS.21to23, according to a first embodiment of the present disclosure, a third optical imaging system3may include an optical system including a first lens1100, a second lens1200, a third lens1300, a fourth lens1400, a fifth lens1500, and a sixth lens1600, sequentially disposed from an object side, and may further include an infrared block filter1700(hereinafter, referred to as a ‘filter’) and an image sensor1800.

The first lens1100to the sixth lens1600may be disposed to be spaced apart from each other by a predetermined distance along an optical axis. The first lens1100to the sixth lens1600may be formed of a plastic material.

Table 21 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 21SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.51000.91301.54456.12.750S2−323.87000.1300S3Second6.22000.24001.66120.3−6.460lensS42.51000.3320S5Third lens−7.16000.24001.65021.5−4.260S64.66000.0500S7StopInfinity0.0100S8Fourth lens4.64000.24001.65021.56.900S9−200.00001.2210S10Fifth lens−2.7300.29001.54456.1−4.230S1115.7300.1500S12Sixth lens17.1800.69801.65021.510.310S13−11.0100.5000S14FilterInfinity0.11001.52339.1S15Infinity0.2670S16ImagingInfinitysurface

Meanwhile, in the third optical imaging system3, the total focal length F3 may be 5.997 mm, the angle of view FOV3 may be 47.594°, Fno3 may be 2.48, TTL3 may be 5.391 mm, and BFL3 may be 0.877 mm.

BFL3 may be a distance from an image side surface of the sixth lens160to an imaging surface of the image sensor180.

In a first embodiment of the third optical imaging system3, the first lens1100may have positive refractive power, first and second surfaces of the first lens1100may be convex in a paraxial region.

The second lens1200may have negative refractive power, a first surface of the second lens1200may be convex in a paraxial region, and a second surface of the second lens1200may be concave in the paraxial region.

The first lens1100and the second lens1200may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens1100and the second lens1200may be different from each other.

The third lens1300may have negative refractive power, first and second surfaces of the third lens1300may be concave in the paraxial region.

The second lens1200and the third lens1300may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe numbers of the second lens1200and the third lens1300may be different from each other.

The fourth lens1400may have positive refractive power, first and second surfaces of the fourth lens1400may be convex in the paraxial region.

A stop ST may be disposed between the third lens1300and the fourth lens1400.

The fifth lens1500may have negative refractive power, first and second surfaces of the fifth lens1500may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the fifth lens1500. For example, the first surface of the fifth lens1500may be concave in the paraxial region and may be convex toward an edge. The second surface of the fifth lens1500may be concave in the paraxial region and may be convex toward the edge.

The sixth lens1600may have positive refractive power, first and second surfaces of the sixth lens1600may be convex in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens1600. For example, the first surface of the sixth lens1600may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens1600may be convex in the paraxial region and may be concave toward the edge.

Among the first lens1100to the sixth lens1600, the absolute value of the focal length of the first lens1100may be the smallest, and the absolute value of the focal length of the sixth lens1600may be the largest.

Meanwhile, object side surfaces and image side surfaces of the first lens1100to the sixth lens1600may all be aspherical surfaces. For example, each surface of the first lens1100to the sixth lens1600may have an aspherical surface coefficient as shown inFIG.22.

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.23.

Referring toFIGS.24to26, according to a second embodiment of the present disclosure, a third optical imaging system3may include an optical system including a first lens2100, a second lens2200, a third lens2300, a fourth lens2400, a fifth lens2500, and a sixth lens2600, sequentially disposed from an object side, and may further include an infrared block filter2700(hereinafter, referred to as a ‘filter’) and an image sensor2800.

The first lens2100to the sixth lens2600may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens2100to the sixth lens2600may be formed of a plastic material.

Table 22 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 22SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.51000.90901.54456.12.760S2−4974.26000.1210S3Second6.61000.24001.66120.3−6.960lensS42.69000.3430S5Third lens−5.10000.24001.65021.5−5.300S611.24000.0180S7StopInfinity0.0700S8Fourth lens6.98000.24001.65021.510.590S9−2000.00001.2040S10Fifth lens−2.9900.29001.54456.1−4.230S1110.6000.1290S12Sixth lens17.5600.70901.65021.511.500S13−13.07000.5000S14FilterInfinity0.11001.52339.1S15Infinity0.2660S16ImagingInfinitysurface

Meanwhile, in the third optical imaging system3, the total focal length F3 may be 6.001 mm, the angle of view (FOV3) may be 47.594°, Fno3 may be 2.488, TTL3 may be 5.389 mm, and BFL3 may be 0.876 mm.

In a second embodiment of the third optical imaging system3, the first lens2100may have positive refractive power, first and second surfaces of the first lens2100may be convex in a paraxial region.

The second lens2200may have negative refractive power, a first surface of the second lens2200may be convex in a paraxial region, and a second surface of the second lens2200may be concave in the paraxial region.

The first lens2100and the second lens2200may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens2100and the second lens2200may be different from each other.

The third lens2400may have negative refractive power, and first and second surfaces of the third lens2300may be concave in the paraxial region.

The second lens2200and the third lens2300may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens2200and the third lens2300may be different from each other.

The fourth lens2400may have positive refractive power, and first and second surfaces of the fourth lens2400may be convex in the paraxial region.

A stop ST may be disposed between the third lens2300and the fourth lens2400.

The fifth lens2500may have negative refractive power, first and second surfaces of the fifth lens2500may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the fifth lens2500. For example, the first surface of the fifth lens2500may be concave in the paraxial region and may be convex toward an edge. The second surface of the fifth lens2500may be concave in the paraxial region and may be convex toward the edge.

The sixth lens2600may have positive refractive power, and first and second surfaces of the sixth surface2600may be convex in a paraxial region.

At least one inflection point may be formed on the first and second surfaces of the sixth lens2600. For example, the first surface of the sixth lens2600may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens2600may be convex in the paraxial region and may be concave toward the edge.

Among the first lens2100to the sixth lens2600, the absolute value of the focal length of the first lens2100may be the smallest, and the absolute value of the focal length of the sixth lens2600may be the largest.

Meanwhile, object side surfaces and image side surfaces of the first lens2100to the sixth lens2600may all be aspherical surfaces. For example, each surface of the first lens2100to the sixth lens2600may have an aspherical surface coefficient as shown inFIG.25.

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.26.

Referring toFIGS.27to29, according to a third embodiment of the present disclosure, a third optical imaging system3may include an optical system including a first lens3100, a second lens3200, a third lens3300, a fourth lens3400, a fifth lens3500, and a sixth lens3600, sequentially disposed from an object side, and may further include an infrared block filter3700(hereinafter, referred to as a ‘filter’) and an image sensor3800.

The first lens3100to the sixth lens3600may be disposed to be spaced apart from each other by a predetermined distance along an optical axis, respectively. The first lens3100to the sixth lens3600may be formed of a plastic material.

Table 23 illustrates lens characteristics (a radius of curvature, a thickness of a lens or a distance between lenses, a refractive index, an Abbe number, and a focal length) of each lens.

TABLE 23SurfaceRadius ofThicknessRefractiveAbbeFocalnumberReferencecurvatureor distanceindexnumberlengthS1First lens1.49000.8911.54456.12.770S265.75000.121S3Second13.06000.2401.66120.3−7.690lensS43.66000.301S5Third lens−4.96000.2401.65021.5−10.43S6−18.23000.007S7StopInfinity0.100S8Fourth lens20000.00.2401.65021.5−18899.98S97663.751.182S10Fifth lens−3.12000.2901.54456.1−4.25S119.36000.189S12Sixth lens18.61000.7131.65021.512.03S13−13.54000.500S14FilterInfinity0.1101.52339.1S15Infinity0.271S16ImagingInfinitysurface

Meanwhile, in the third optical imaging system3, the total focal length F3 may be 6.001 mm, the angle of view (FOV3) may be 47.594°, Fno3 may be 2.59, TTL3 may be 5.395 mm, and BFL3 may be 0.881 mm.

In the third embodiment of the third optical imaging system3, the first lens3100may have positive refractive power, a first surface of the first lens3100may be convex in a paraxial region, and a second surface of the first lens3100may be concave in the paraxial region.

The second lens3200may have negative refractive power, a first surface of the second lens3200may be convex in a paraxial region, and a second surface of the second lens3200may be concave in the paraxial region.

The first lens3100and the second lens3200may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the first lens3100and the second lens3200may be different from each other.

The third lens3300may have negative refractive power, a first surface of the third lens3300may be concave in a paraxial region, and a second surface of the third lens3300may be convex in the paraxial region.

The second lens3200and the third lens3300may be formed of plastic materials having different optical characteristics from each other. As an example, the Abbe number of the second lens3200and the third lens3300may be different from each other.

The fourth lens3400may have negative refractive power, and a first surface of the fourth lens3400may be convex in a paraxial region, and a second surface of the fourth lens3400may be concave in the paraxial region.

A stop ST may be disposed between the third lens3300and the fourth lens3400.

The fifth lens3500may have negative refractive power, and first and second surfaces of the fifth lens3500may be concave in the paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the fifth lens3500. For example, the first surface of the fifth lens3500may be concave in the paraxial region and may be convex toward an edge. The second surface of the fifth lens3500may be concave in the paraxial region and may be convex toward the edge.

The sixth lens3600may have positive refractive power, first and second surfaces of the sixth lens3600may be convex in a paraxial region.

In addition, at least one inflection point may be formed on the first and second surfaces of the sixth lens3600. For example, the first surface of the sixth lens3600may be convex in the paraxial region and may be concave toward an edge. The second surface of the sixth lens3600may be convex in the paraxial region and may be concave toward the edge.

Among the first lens3100to the sixth lens3600, the absolute value of the focal length of the first lens3100may be the smallest, and the absolute value of the focal length of the fourth lens3400may be the largest.

Meanwhile, object side surfaces and image side surfaces of the first lens3100to the sixth lens3600may all be aspherical surfaces. For example, each surface of the first lens3100to the sixth lens3600may have an aspherical surface coefficient as shown inFIG.28.

In addition, the optical imaging system thus configured may have aberration characteristics illustrated inFIG.29.

Table 24 shows conditional expression values of the third optical imaging system3according to each embodiment.

TABLE 24FirstSecondThirdembodimentembodiment ofembodimentof third opticalthird opticalof third opticalimaging systemimaging systemimaging systemTTL3/F30.8990.8980.899R1_3/F30.2510.2520.248F3/f2_3−0.928−0.862−0.781d45_3/TTL30.2260.2230.219Nd6_31.651.652.65tanθ_30.4410.4410.441Fno32.482.4882.59

As set forth above, according to an embodiment of the present disclosure, a subject may be captured at various distances.

While specific examples have been shown and described above, it will be apparent after an understanding of the disclosure of this application that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure.