TW201518767A - Lens module - Google Patents

Abstract

A lens module may include a first lens having positive refractive power, a second lens having positive refractive power, a third lens having refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, and a sixth lens having negative refractive power and having one or more inflection points formed on an image-side surface thereof. An overall focal length of the lens module f and a focal length of the first lens f1 may satisfy the following Conditional Expression: [Conditional Expression] 1.0 < f1/f < 2.0.

Description

Lens module [Cross-Reference to Related Applications]

This application claims Korean Patent Application No. 10-2013-0135248, filed on November 8, 2013 with the Korea Intellectual Property Office, and Korean Patent Application No. 10-2014-0008210, filed with the Korea Intellectual Property Office on January 23, 2014. The priority of the Korean Patent Application No. 10-2014-0023269 filed on Jan. 27, 2014, to the Korean Intellectual Property Office, the entire disclosure of which is hereby incorporated by reference.

The present disclosure relates to a lens module having an optical system comprising six or more lenses.

Generally, a camera for a mobile communications terminal includes a lens module and an imaging device.

The lens module usually includes a plurality of lenses and includes an optical system, an optical system The system includes a plurality of lenses to capture an image of a subject to be projected onto the imaging device. In this regard, a device such as a charge coupled device (CCD) or the like is used as the imaging device, and this imaging device typically has a pixel size of, for example, 1.4 μm or more.

However, according to the gradual decrease in the size of the mobile communication terminal and the camera module installed in the mobile communication terminal, the pixel size of the imaging device has been reduced to, for example, 1.12 micrometers or less. Therefore, for developing a lens module having a low aperture number (F No.) of, for example, 2.3 or less, at this low aperture number, an image captured by the lens module can be obtained even under the above conditions. The implementation of high degree of resolution is desirable.

Some embodiments of the present disclosure may provide a lens module that is capable of performing high resolution in images captured by a lens module.

According to some embodiments of the present disclosure, a lens module may include: a first lens having a positive refractive power; a second lens having a positive refractive power; and a third lens having a refractive power a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; and a sixth lens having a negative refractive power and having an image-side surface formed on the sixth lens One or more inflection points on the ).

According to some embodiments of the present disclosure, a lens module may include: a first lens having refractive power and having a convex object-side surface; a second lens having refractive power and having a convex surface Side surface and convex a surface side surface; a third lens having refractive power and having a convex side surface; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having refractive power and having an aspherical shape (aspherical shape), in the aspherical shape, two or more inflection points are formed on the object side surface of the sixth lens, and two or more inflection points are formed on the image side surface of the sixth lens on.

10‧‧‧ first lens

20‧‧‧second lens

30‧‧‧ third lens

40‧‧‧Fourth lens

50‧‧‧ fifth lens

60‧‧‧ sixth lens

70‧‧‧Infrared cut filter

80‧‧‧Image Sensor

100‧‧‧ lens module

CT6‧‧‧The thickness of the sixth lens along the optical axis

Thickness at the first concave point of Pt1‧‧

Thickness at the first convex point of Pt2‧‧

Pt3‧‧‧second convex point

ST‧‧‧ aperture

The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following description taken in conjunction with the accompanying drawings in which: FIG. A configuration diagram of a lens module of an embodiment.

FIG. 2 is a graph illustrating optical aberration characteristics of the lens module illustrated in FIG. 1. FIG.

FIG. 3 is a table showing the characteristics of the lens illustrated in FIG. 1.

4 is a table showing an aspherical surface coefficient of the lens module illustrated in FIG. 1.

FIG. 5 is a configuration diagram of a lens module according to a second exemplary embodiment of the present disclosure.

Fig. 6 is a graph for explaining optical aberration characteristics of the lens module illustrated in Fig. 5.

Fig. 7 is a table showing the characteristics of the lens illustrated in Fig. 5.

Figure 8 is a table showing aspherical surface coefficients of the lens module illustrated in Figure 5.

9 is a configuration diagram of a lens module in accordance with a third exemplary embodiment of the present disclosure.

Figure 10 is a graph showing the optical aberration characteristics of the lens module illustrated in Figure 9 Figure.

Figure 11 is a table showing the characteristics of the lens illustrated in Figure 9.

Figure 12 is a table showing aspherical surface coefficients of the lens module illustrated in Figure 9.

Fig. 13 is a partially enlarged view showing a concave point and a convex point of the sixth lens.

In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the disclosure may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and the scope of the disclosure will be fully conveyed by those skilled in the art. The shapes and dimensions of the elements may be exaggerated for clarity, and the same drawing element symbols are used throughout to indicate the same or similar elements. The singular forms "a", "the" and "the"

In the description of the exemplary embodiments, the first lens refers to the lens closest to the object side, and the sixth lens refers to the lens closest to the image side. In addition, the term "front" refers to the direction from the lens module toward the object, and the term "rear" refers to the direction from the lens module toward the image sensor. Further, the first surface of each lens refers to a surface (or an object side surface) on the object side, and the second surface of each lens refers to a surface (or an image side surface) on the image side. In addition, in the present specification, radius of curvature, thickness, Through-the-Lens (TTL) metering distance (or OAL), SL, 2Y, the total focal length of the optical system, and the focal length of each lens can be Millimeter (mm) meter. However, the unit of the above physical properties is not limited to this case. Further, the thickness of the lens, the inter-lens spacing, the through lens (or OAL), and the SL are distances measured based on the optical axis of the lens. Further, in the description of the lens shape, the one surface of the lens is convex to mean that the optical axis portion of the lens surface is convex, and the one surface of the lens is concave so that the optical axis portion of the corresponding lens surface is concave. Therefore, in a case where one surface of the lens is described as a convex surface, the edge portion of the lens may be concave. Likewise, in a case where one surface of the lens is described as a surface of the lens which is concave, the edge portion of the lens may be a convex. Further, in the following embodiments, the term "recurve point" means a point at which the radius of curvature changes in a portion that does not intersect the optical axis.

1 is a configuration diagram of a lens module according to a first exemplary embodiment of the present disclosure; FIG. 2 is a graph illustrating optical aberration characteristics of the lens module illustrated in FIG. 1; a table showing the characteristics of the lens; FIG. 4 is a table showing the aspherical surface coefficients of the lens module illustrated in FIG. 1; FIG. 5 is a configuration of the lens module according to the second exemplary embodiment of the present disclosure. Figure 6 is a graph illustrating the optical aberration characteristics of the lens module illustrated in Figure 5; Figure 7 is a table showing the characteristics of the lens illustrated in Figure 5; Figure 8 is a lens module illustrated in Figure 5 A table of aspherical surface coefficients; FIG. 9 is a configuration diagram of a lens module according to a third exemplary embodiment of the present disclosure; and FIG. 10 is a graph illustrating optical aberration characteristics of the lens module illustrated in FIG. Figure 11 is a table showing the characteristics of the lens illustrated in Figure 9; Figure 12 is a table showing the aspherical surface coefficients of the lens module illustrated in Figure 9; and Figure 13 is a view showing the concave and convex surfaces of the sixth lens Part of the point Big picture.

A lens module in accordance with the present disclosure may comprise an optical system comprising six or more than six lenses. For example, the lens module may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. However, the lens module is not limited to only including six lenses, and may further include other components or additional one or more lenses as necessary. For example, the lens module can include a stop for controlling the amount of light. In addition, the lens module may further include an infrared cut-off filter that cuts off the infrared rays. In addition, the lens module may further include an image sensor (ie, an imaging device) that converts an image incident on the body of the optical system into an electrical signal. In addition, the lens module may further include an interval maintaining member that adjusts the interval between the lenses. In addition to the six lenses, one or more lenses may be disposed in front of the first lens, behind the sixth lens, or between the first lens and the sixth lens.

The first to sixth lenses of the configuration optical system may be formed of plastic. Further, at least one of the first to sixth lenses may have an aspherical surface. In addition, the first to sixth lenses may each have at least one aspherical surface. That is, at least one of the first surface and the second surface of the first to sixth lenses may be aspherical. Here, the aspherical surface of each lens can be expressed by Equation 1.

In Equation 1, c indicates curvature, k indicates a conic constant, and r indicates the distance from any point on the aspheric surface to the optical axis. And the constants A, B, C, D, E, F, G, H, and J sequentially indicate 4th-order aspherical coefficients, 6th-order aspherical coefficients, 8th-order aspherical coefficients, 10th-order aspherical coefficients, and 12th-order aspherical surfaces. Coefficient, 14th-order aspherical coefficient, 16th-order aspherical coefficient, 18th-order aspherical coefficient, and 20th-order aspherical coefficient. Further, Z is the height of a point of the aspherical surface that is separated from the optical axis by a distance r.

The optical system including the first to sixth lenses may have an aperture number of 2.4 or less. In this case, the subject can be clearly imaged. For example, a lens module in accordance with the present disclosure can clearly capture an image of a subject even under low lighting conditions (eg, 100 lux or less than 100 lux).

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following Conditional Expression: [Conditional Formula] 1.0<f1/f<2.0

Here, f is the total focal length of the lens module, and f1 is the focal length of the first lens. The above conditional expression may indicate a numerical condition for optimizing the refractive power of the first lens. For example, in the case where f1/f is lower than the lower limit value of the above conditional expression, the optical design of the second lens to the fifth lens is due to the strong refractive power of the first lens. Can be restricted. In the case where f1/f is larger than the upper limit value of the above conditional expression, since the first lens has a weak refractive power, it is difficult to downsize the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional formula: [Conditional Formula] V1-V3>25.0

Here, V1 is the Abbe number of the first lens, and V3 is the Abbe number of the third lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional expression] n4>1.6

Here, n4 is a refractive index of the fourth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] V1-V5>25.0

Here, V1 is the Abbe number of the first lens, and V5 is the Abbe number of the fifth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 0.5 < f2 / f < 1.5

Here, f2 is the focal length of the second lens, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 2.0<|f5/f|<100

Here, f5 is the focal length of the fifth lens, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional formula: [Conditional formula] OAL/f<1.5

Here, the OAL is the distance from the object side surface of the first lens to the image surface or the image sensor, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 1.0<f1/f2<2.5

Here, f1 is the focal length of the first lens, and f2 is the focal length of the second lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 0.3<|f2/f3|<2.0

Here, f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] BFL/f>0.2

Here, the BFL is the distance from the image side surface of the sixth lens to the image surface, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] D1/f>0.01

Here, D1 is an air gap between the first lens and the second lens, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] r1/f>0.3

Here, r1 is the radius of curvature of the object side surface of the first lens, and f is the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] r6/f>0.3

Here, r6 is the radius of curvature of the image side surface of the third lens, and f is a lens mode The total focal length of the group.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] EPD/2/f1>0.1

Here, EPD/2 is the size of the entrance pupil (unit: mm), and f1 is the focal length of the first lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f3/f|<2.0

Here, f3 is the focal length of the third lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the third lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] f4/f>3.0

Here, f4 is the focal length of the fourth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fourth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f5/f|>3.0

Here, f5 is the focal length of the fifth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fifth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f6/f|<6.0

Here, f6 is the focal length of the sixth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the sixth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional formula] OAL/f1>0.5

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f1 is the focal length of the first lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the first lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional formula] 0 < OAL / f2 < 1.7

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f2 is the focal length of the second lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the second lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional]|OAL/f3|>1.0

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f3 is the focal length of the third lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the third lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] 0 < OAL / f4 < 0.5

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f4 is the focal length of the fourth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fourth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|OAL/f5|<0.5

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f5 is the focal length of the fifth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fifth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|OAL/f6|>0.2

Here, OAL is the distance from the object side surface of the first lens to the image surface, and f6 is the focal length of the sixth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the sixth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f3/f4|<0.3

Here, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fourth lens with respect to the refractive power of the third lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f4/f5|<0.7

Here, f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fifth lens with respect to the refractive power of the fourth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 1.5<f5/f6<6.0

Here, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the sixth lens with respect to the refractive power of the fifth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f1/f3|<3.0

Here, f1 is the focal length of the first lens, and f3 is the focal length of the third lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the third lens with respect to the refractive power of the first lens. For example, in the case where the third lens has a value |f1/f3| greater than the upper limit value of the above conditional expression, it may be difficult to correct chromatic optical aberration.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 0<f1/f4<1.5

Here, f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens. the above The conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fourth lens with respect to the refractive power of the first lens. For example, in the case where the fourth lens has a value f1/f4 larger than the upper limit value of the above conditional expression, it may be difficult to correct the chromaticity optical aberration.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f1/f5|<1.5

Here, f1 is the focal length of the first lens, and f5 is the focal length of the fifth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the fifth lens with respect to the refractive power of the first lens. For example, in the case where the fifth lens has a value |fl/f5| equal to or greater than 1.5, it may be difficult to correct the chromaticity optical aberration.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|f1/f6|<1.5

Here, f1 is the focal length of the first lens, and f6 is the focal length of the sixth lens. The above conditional expression may indicate a condition for optimizing the magnitude of the refractive power of the sixth lens with respect to the refractive power of the first lens. For example, in the case where the sixth lens has a value |f1/f6| equal to or greater than 1.5, it may be difficult to correct the chromaticity optical aberration.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] 0 < r2 / f < 1.2

Here, r2 is the radius of curvature of the image side surface of the first lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the first lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following Conditional formula: [Conditional formula] 0.4 <r3/f<1.2

Here, r3 is the radius of curvature of the object side surface of the second lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the object side surface of the second lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|r4/f|<10.0

Here, r4 is the radius of curvature of the image side surface of the second lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the second lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] r5/f>1.3

Here, r5 is the radius of curvature of the object side surface of the third lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the object side surface of the third lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] r6/f>0.4

Here, r6 is the radius of curvature of the image side surface of the third lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the third lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following Conditional expression: [conditional expression]|r7/f|>1.0

Here, r7 is the radius of curvature of the object side surface of the fourth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the object side surface of the fourth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|r8/f|>0.5

Here, r8 is the radius of curvature of the image side surface of the fourth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the fourth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|r9/f|>0.3

Here, r9 is the radius of curvature of the object side surface of the fifth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the object side surface of the fifth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression]|r10/f|>0.4

Here, r10 is the radius of curvature of the image side surface of the fifth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the fifth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following Conditional expression: [conditional expression] 0 < r11 / f < 0.5

Here, r11 is the radius of curvature of the object side surface of the sixth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the object side surface of the sixth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [conditional expression] 0 < r12 / f < 0.4

Here, r12 is the radius of curvature of the image side surface of the sixth lens, and f is the total focal length of the lens module. The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the sixth lens with respect to the total focal length of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional formula: [Conditional Formula] 2.0<D1/D2<5.0

Here, D1 is an air gap between the first lens and the second lens, and D2 is an air gap between the second lens and the third lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] D2/D3>0.08

Here, D2 is an air gap between the second lens and the third lens, and D3 is an air gap between the third lens and the fourth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] D3/D4<2.0

Here, D3 is an air gap between the third lens and the fourth lens, and D4 is an air gap between the fourth lens and the fifth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] D4/D5>5.0

Here, D4 is an air gap between the fourth lens and the fifth lens, and D5 is an air gap between the fifth lens and the sixth lens.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional formula: [Conditional Formula] V4/30+V5/30<2.0

Here, V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

The above conditional expression may indicate conditions for enabling the fourth lens and the fifth lens to be easily manufactured. For example, since the fourth lens and the fifth lens satisfying the above conditional expression have a high refractive index, the lenses may have a large radius of curvature. In the lens having the radius of curvature as described above, since the manufacturing tolerance is small, the lens can be easily manufactured. In addition, since the lens having the radius of curvature as described above can reduce the distance between the lenses, the lens can facilitate miniaturization of the lens module.

In the lens module according to an exemplary embodiment of the present disclosure, the sixth lens may have an aspherical shape in which two or more inversion points are formed on the object side surface of the sixth lens And/or two or more than two inflection points are formed on the image side surface of the sixth lens.

In the lens module according to an exemplary embodiment of the present disclosure, an edge or a peripheral portion of the object side surface of the sixth lens may be a convex surface.

In the lens module according to the exemplary embodiment of the present disclosure, an edge or a peripheral portion of the image side surface of the sixth lens may be a convex surface.

In the lens module according to an exemplary embodiment of the present disclosure, the sixth lens may have an aspherical shape in which four inflection points may be formed on the object side surface of the sixth lens.

In the lens module according to an exemplary embodiment of the present disclosure, the sixth lens may have an aspherical shape, and in the aspherical shape, six inflection points may be formed on the object side surface of the sixth lens.

In the lens module according to an exemplary embodiment of the present disclosure, the sixth lens may have an aspherical shape in which four inflection points may be formed on the image side surface of the sixth lens.

In the lens module according to the exemplary embodiment of the present disclosure, the sixth lens may have an aspherical shape in which six inflection points may be formed on the image side surface of the sixth lens.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 0.03<IP611/2Y<0.04

[Conditional formula] 0.20<IP612/2Y<0.30

[Conditional formula] 0.27<IP613/2Y<0.48

Here, the IP 611 is a radius from an optical axis of the sixth lens to an inflection point formed in a position closest to the optical axis among the inflection points formed on the object side surface of the sixth lens, IP612 is from the sixth The radius of the optical axis of the lens to the inflection point formed in the second position near the optical axis among the inflection points formed on the object side surface of the sixth lens, IP613 is from the optical axis of the sixth lens to The opposite of the object side surface of the sixth lens The radius of the inflection point formed in the third position near the optical axis among the curved points, and 2Y is the diagonal length of the image surface.

The above conditional expression may indicate conditions for optimizing the shape of the object side surface of the sixth lens. For example, a sixth lens that satisfies one or more of the above conditional expressions may improve optical aberrations and/or resolution.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 0.03<IP621/2Y<0.06

[Conditional formula] 0.25<IP622/2Y<0.46

[Conditional formula] 0.38<IP623/2Y<0.43

Here, IP621 is a radius from an optical axis of the sixth lens to an inflection point formed in a position closest to the optical axis among the inflection points formed on the image side surface of the sixth lens, IP622 is from the sixth The radius of the optical axis of the lens to the inflection point formed in the second position close to the optical axis among the inflection points formed on the image side surface of the sixth lens, IP623 is from the optical axis of the sixth lens to The radius of the inflection point formed in the third position near the optical axis among the inflection points on the image side surface of the sixth lens, and 2Y is the diagonal length of the image surface.

The above conditional expression may indicate a condition for optimizing the shape of the image side surface of the sixth lens. For example, a sixth lens that satisfies one or more of the above conditional expressions may improve optical aberrations and/or resolution.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 0.08<IP611/L61ER<0.11

[Conditional formula] 0.54<IP612/L61ER<0.76

[Conditional formula] 0.97<IP613/L61ER<0.99

Here, the IP 611 is a radius from an optical axis of the sixth lens to an inflection point formed in a position closest to the optical axis among the inflection points formed on the object side surface of the sixth lens, IP612 is from the sixth The radius of the optical axis of the lens to the inflection point formed in the second position near the optical axis among the inflection points formed on the object side surface of the sixth lens, IP613 is from the optical axis of the sixth lens to Among the inflection points on the object side surface of the sixth lens, the radius of the inflection point formed in the third position close to the optical axis, and L61ER is the effective area on the object side surface of the sixth lens that refracts the incident light The radius of the effective region.

The above conditional expression may indicate conditions for optimizing the shape and size of the object side surface of the sixth lens. For example, the above conditional expression may indicate a condition for optimizing the effective size (eg, effective radius) of the sixth lens with respect to the shape of the sixth lens. The sixth lens that satisfies one or more of the above conditional expressions can contribute to miniaturization of the lens module.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 0.09<IP621/L62ER<0.13

[Conditional formula] 0.85<IP622/L62ER<0.89

[Conditional formula] 0.94<IP623/L62ER<0.99

Here, IP621 is a radius from an optical axis of the sixth lens to an inflection point formed in a position closest to the optical axis among the inflection points formed on the image side surface of the sixth lens, IP622 is from the sixth The radius of the optical axis of the lens to the inflection point formed in the second position close to the optical axis among the inflection points formed on the image side surface of the sixth lens, IP623 is from the optical axis of the sixth lens to The opposite of the image side surface of the sixth lens The radius of the inflection point formed in the third position near the optical axis among the curved points, and L62ER is the radius of the effective area on the image side surface of the sixth lens that refracts the incident light.

The above conditional expression may indicate conditions for optimizing the shape and size of the image side surface of the sixth lens. For example, the above conditional expression may indicate a condition for optimizing the effective size (eg, effective radius) of the sixth lens with respect to the shape of the sixth lens. The sixth lens that satisfies one or more of the above conditional expressions can contribute to miniaturization of the lens module.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 1.02<Pt1/CT6<1.25

[Conditional formula] 1.15<Pt2/CT6<1.43

[Conditional formula] 1.02<Pt3/CT6<1.36

[Conditional formula] 0.79<Pt1/Pt2<0.97

[Conditional formula] 0.83<Pt1/Pt3<1.12

[Conditional formula] 0.94<Pt2/Pt3<1.27

Here, CT6 is the thickness of the sixth lens along the optical axis (or the thickness at the center of the six lenses), Pt1 is the thickness at the first concave point, Pt2 is the thickness at the first convex point, and Pt3 is the second Convex point.

The above conditional expression may indicate conditions for optimizing the distribution of the refractive power of the sixth lens. For example, a sixth lens that satisfies one or more of the above conditional expressions can uniformly project incident light onto the image surface. Further, the sixth lens that satisfies one or more of the above conditional expressions can reduce spherical optical aberration.

A lens module according to an exemplary embodiment of the present disclosure may satisfy one or more of the following conditional expressions: [Conditional Formula] 2.52<L61ER<2.72

[Conditional formula] 2.68<L62ER<3.10

Here, L61ER is a radius of an effective region of the object side surface of the sixth lens that refracts incident light, and L62ER is a radius of an effective region of the image side surface of the sixth lens that refracts incident light.

The above conditional expression may be a condition for optimizing the size of the sixth lens. For example, the sixth lens that satisfies one or more of the above conditional expressions may facilitate miniaturization of the lens module.

A lens module according to an exemplary embodiment of the present disclosure may satisfy at least one of the following conditional expressions: [Conditional Formula] 0.86<L11ER<1.30

[Conditional formula] 0.74<L12ER<1.23

Here, L11ER is a radius of an effective region of the object side surface of the first lens that refracts incident light, and L12ER is a radius of an effective region of the image side surface of the first lens that refracts incident light.

The above conditional expression may be a condition for optimizing the size of the first lens. For example, the first lens that satisfies one or more of the above conditional expressions may facilitate miniaturization of the lens module.

A lens module according to an exemplary embodiment of the present disclosure may satisfy at least one of the following conditional expressions: [Conditional Formula] 0.73<L21ER<1.30

[Conditional formula] 0.70<L22ER<1.12

Here, L21ER is a radius of an effective region of the object side surface of the second lens that refracts incident light, and L22ER is a radius of an effective region of the image side surface of the second lens that refracts incident light.

The above conditional expression may be a condition for optimizing the size of the second lens. For example, a second lens that satisfies one or more of the above conditional expressions may facilitate miniaturization of the lens module.

The lens module according to an exemplary embodiment of the present disclosure can satisfy the following conditional expression: [Conditional Formula] 0.70<L31ER<1.11

[Conditional formula] 0.74<L32ER<1.17

Here, L31ER is a radius of an effective region of the object side surface of the third lens that refracts incident light, and L32ER is a radius of an effective region of the image side surface of the third lens that refracts incident light.

The above conditional expression may be a condition for optimizing the size of the third lens. For example, a third lens that satisfies one or more of the above conditional expressions may facilitate miniaturization of the lens module.

Next, an exemplary embodiment of the first to sixth lenses configuring the optical system will be described.

The first lens can have refractive power. For example, the first lens can have a positive refractive power. The first surface (or object side surface) of the first lens may be a convex surface, and the second surface (or image side surface) of the first lens may be a concave surface. For example, the first lens may have a meniscus shape that is convex toward the object side. At least one of the first surface and the second surface of the first lens may be aspherical. For example, the two surfaces of the first lens can be aspherical. The first lens can have high light transmission Material formation with high light transmissivity and/or high workability. For example, the first lens can be formed from plastic. However, the material of the first lens is not limited to plastic. For example, the first lens can be formed from glass.

The second lens can have refractive power. For example, the second lens can have a positive refractive power. Further, the refractive power of the second lens is stronger than the refractive power of the first lens. For example, the focal length of the second lens may be shorter than the focal length of the first lens (ie, the following conditional expression may be satisfied: |f1|>|f2|). Both surfaces of the second lens may be convex. At least one of the first surface and the second surface of the second lens may be aspherical. For example, the two surfaces of the second lens can be aspherical. The second lens may be formed of a material having high light transmittance and/or high processability. For example, the second lens can be formed from plastic. However, the material of the second lens is not limited to plastic. For example, the second lens can be formed from glass.

The third lens may have refractive power. For example, the third lens can have a negative refractive power. Further, the refractive power of the third lens is stronger than the refractive power of the fifth lens. For example, the focal length of the third lens may be shorter than the focal length of the fifth lens (that is, the following conditional expression may be satisfied: |f5|>|f3|). The first surface of the third lens may be convex and the second surface of the third lens may be concave. For example, the third lens may have a meniscus shape that is convex toward the object side, or a plano-convex shape that is convex toward the object side. At least one of the first surface and the second surface of the third lens may be aspherical. For example, the two surfaces of the third lens may be aspherical. The third lens may be formed of a material having high light transmittance and/or high processability. For example, the third lens can be formed of plastic. However, the material of the third lens is not limited to plastic. For example, the third lens can be formed from glass. In addition, the third lens may be formed of a material having a high refractive index. For example, the third lens can have a refractive index of 1.60 Or a material larger than 1.60 is formed (in this case, the Abbe number of the third lens may be 30 or less). Since the third lens formed of the material as described above can have a relatively large radius of curvature, the third lens can be easily fabricated. Further, if the third lens is formed of at least one of the materials as described above, the manufacturing tolerance can be small, and the manufacturing defect rate of the lens module can be reduced. Additionally, the third lens formed from at least one of the materials as described above may reduce the inter-lens distance and may facilitate miniaturization of the lens module. Further, the diameter of the third lens may be smaller than the diameters of the first lens and the second lens. For example, the effective diameter of the third lens (eg, the diameter of the portion of the effective light that is substantially incident to be thereby refracted) can be less than the effective diameter of the first lens and the second lens.

The fourth lens can have refractive power. For example, the fourth lens can have a positive refractive power. The first surface of the fourth lens may be a concave surface, and the second surface of the fourth lens may be a convex surface. For example, the fourth lens may have a meniscus shape that is convex toward the image side, or a plano-convex shape that is convex toward the image side. At least one of the first surface and the second surface of the fourth lens may be aspherical. For example, the two surfaces of the fourth lens may be aspherical. The fourth lens may be formed of a material having high light transmittance and/or high processability. For example, the fourth lens can be formed of plastic. However, the material of the fourth lens is not limited to plastic. For example, the fourth lens may be formed of glass. For example, the fourth lens may be formed of a material having a high refractive index. For example, the fourth lens may be formed of a material having a refractive index of 1.60 or greater than 1.60 (in this case, the Abbe number of the fourth lens may be 30 or less). Since the fourth lens formed of the material as described above can have a relatively large radius of curvature, the fourth lens can be easily fabricated. Further, since the manufacturing tolerance is small in the fourth lens formed of the material as described above, the manufacturing defect rate of the lens module can be reduced. In addition, due to The fourth lens formed by the material described above can reduce the distance between the lenses, so the fourth lens can facilitate miniaturization of the lens module.

The fifth lens may have refractive power. For example, the fifth lens may have a positive refractive power or a negative refractive power. The first surface of the fifth lens may be a concave surface, and the second surface of the fifth lens may be a convex surface. For example, the fifth lens may have a meniscus shape that is convex toward the image side. At least one of the first surface and the second surface of the fifth lens may be aspherical. For example, the two surfaces of the fifth lens may be aspherical. The fifth lens may be formed of a material having high light transmittance and/or high workability. For example, the fifth lens can be formed of plastic. However, the material of the fifth lens is not limited to plastic. For example, the fifth lens may be formed of glass. In addition, the fifth lens may be formed of a material having a high refractive index. For example, the fifth lens may be formed of a material having a refractive index of 1.60 or greater than 1.60 (in this case, the Abbe number of the fifth lens may be 30 or less). The fifth lens formed by at least one of the materials as described above may have a relatively large radius of curvature and may be easily manufactured. Further, if the fifth lens is formed of at least one of the materials as described above, the manufacturing tolerance can be small, and the manufacturing defect rate of the lens module can be reduced. Additionally, the fifth lens formed from at least one of the materials as described above may reduce the inter-lens distance and may facilitate miniaturization of the lens module.

The sixth lens may have refractive power. For example, the sixth lens may have positive refractive power or negative refractive power. The first surface of the sixth lens may be convex and the second surface of the sixth lens may be concave. Further, the sixth lens may have a shape in which at least one inflection point or a turning point is formed on at least one surface of the sixth lens. For example, the second surface of the sixth lens may be concave at the center of the sixth lens or on the optical axis, and may be convex toward the edge or the peripheral portion of the sixth lens. surface. At least one of the first surface and the second surface of the sixth lens may be aspherical. For example, the two surfaces of the sixth lens may be aspherical. The sixth lens may be formed of a material having high light transmittance and/or high processability. For example, the sixth lens can be formed of plastic. However, the material of the sixth lens is not limited to plastic. For example, the sixth lens may be formed of glass.

Meanwhile, in the lens module according to some exemplary embodiments, the lens may be disposed such that the effective radius of the lens decreases from the first lens toward the third lens and increases from the fourth lens toward the sixth lens. In an optical system configured as described above, the amount of light projected onto the image sensor can be increased such that the resolution of the lens module can be improved.

Moreover, some illustrative embodiments of lens modules configured as described above may improve optical aberrations that cause image quality degradation. Additionally, some illustrative embodiments of lens modules configured as described above may improve resolution. Additionally, some illustrative embodiments of lens modules configured as described above are not only convenient and lightweight, but also beneficial in reducing manufacturing costs.

A lens module according to a first exemplary embodiment of the present disclosure will be described with reference to FIGS. 1 through 4.

The lens module 100 according to the present exemplary embodiment may include an optical system including a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, and a sixth lens 60. The lens module 100 further includes an infrared cut filter 70 and an image sensor 80. Further, the lens module 100 according to the present exemplary embodiment may have a number of apertures of about 2.2 and a field of view (FOV) of about 70.5 degrees. In addition, in the lens module 100 according to the present exemplary embodiment, all of the third lens 30 to the fifth lens 50 have a refractive index of about 1.640 and Abbe. The number is approximately 23.3.

In the present exemplary embodiment, the first lens 10 may have a positive refractive power. Further, the first surface (or object side surface) of the first lens 10 may be a convex surface, and the second surface (or image side surface) of the first lens 10 may be a concave surface. The second lens 20 may have a positive refractive power. Further, both surfaces of the second lens 20 may be convex. The third lens 30 may have a negative refractive power. Further, the first surface of the third lens 30 may be convex, and the second surface of the third lens 30 may be concave. The fourth lens 40 may have a positive refractive power. Further, the first surface of the fourth lens 40 may be a concave surface, and the second surface of the fourth lens 40 may be a convex surface. The fifth lens 50 may have a negative refractive power. Further, the first surface of the fifth lens 50 may be a concave surface, and the second surface of the fifth lens 50 may be a convex surface. The sixth lens 60 may have a negative refractive power. Further, the first surface of the sixth lens 60 may be a convex surface, and the second surface of the sixth lens 60 may be a concave surface. Additionally, the sixth lens 60 can have one or more inflection points. For example, the sixth lens 60 may have an inflection point formed on the second surface of the sixth lens 60. At the same time, the fourth lens 40 may be disposed close to the third lens 30. For example, the air gap between the fourth lens 40 and the third lens 30 may be smaller than the air gap between the fourth lens 40 and the fifth lens 50.

The lens module 100 according to the present exemplary embodiment may include one or more apertures ST. For example, the aperture ST may be disposed between the second lens 20 and the third lens 30. However, the aperture ST may be disposed in front of the first lens 10, disposed between the first lens 10 and the second lens 20, or disposed anywhere between the third lens 30 and the sixth lens 60.

The lens module configured as described above may have the optical aberration characteristics illustrated in FIG. 2 and may have the lens characteristics illustrated in FIGS. 3 and 4. Out of For reference, FIG. 3 is a table showing the radius of curvature, the thickness of each lens, and the distance between lenses, the refractive index, and the Abbe number of the lens, and FIG. 4 is a table showing the aspherical surface values of the lenses.

A lens module according to a second exemplary embodiment of the present disclosure will be described with reference to FIGS. 5 through 8.

The lens module 100 according to the present exemplary embodiment may include an optical system including a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, and a sixth lens 60. The lens module 100 may further include an infrared cut filter 70 and/or an image sensor 80. Further, the lens module 100 according to the present exemplary embodiment may have a number of apertures of about 2.3 and a field of view of about 70.2 degrees. Further, in the lens module 100 according to the present exemplary embodiment, all of the third lens 30 to the fifth lens 50 have a refractive index of about 1.640 and an Abbe number of about 23.3.

In the present exemplary embodiment, the first lens 10 may have a positive refractive power. Further, the first surface (or object side surface) of the first lens 10 may be a convex surface, and the second surface (or image side surface) of the first lens 10 may be a concave surface. The second lens 20 may have a positive refractive power. Further, both surfaces of the second lens 20 may be convex. The third lens 30 may have a negative refractive power. Further, the first surface of the third lens 30 may be convex, and the second surface of the third lens 30 may be concave. The fourth lens 40 may have a positive refractive power. Further, the first surface of the fourth lens 40 may be a concave surface, and the second surface of the fourth lens 40 may be a convex surface. The fifth lens 50 may have a negative refractive power. Further, the first surface of the fifth lens 50 may be a concave surface, and the second surface of the fifth lens 50 may be a convex surface. The sixth lens 60 may have a negative refractive power. Further, the first surface of the sixth lens 60 may be a convex surface, and the second surface of the sixth lens 60 may be a concave surface. another Additionally, the sixth lens 60 can have one or more inflection points. For example, the sixth lens 60 may have an inflection point formed on the second surface of the sixth lens 60. At the same time, the fourth lens 40 may be disposed close to the third lens 30. For example, the air gap between the fourth lens 40 and the third lens 30 may be smaller than the air gap between the fourth lens 40 and the fifth lens 50.

The lens module 100 according to the present exemplary embodiment may include one or more apertures ST. For example, the aperture ST may be disposed between the second lens 20 and the third lens 30. However, the aperture ST may be disposed in front of the first lens 10, disposed between the first lens 10 and the second lens 20, or disposed anywhere between the third lens 30 and the sixth lens 60.

The lens module configured as described above may have the optical aberration characteristics illustrated in FIG. 6 and may have the lens characteristics illustrated in FIGS. 7 and 8. For reference, FIG. 7 is a table showing the radius of curvature, the thickness of each lens, and the distance between lenses, the refractive index, the Abbe number of the lens, and FIG. 8 is a table showing the aspherical surface values of the lenses.

A lens module according to a third exemplary embodiment of the present disclosure will be described with reference to FIGS. 9 through 12.

The lens module 100 according to the present exemplary embodiment may include an optical system including a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, and a sixth lens 60. The lens module 100 may further include an infrared cut filter 70 and/or an image sensor 80. Further, the lens module 100 according to the present exemplary embodiment may have a number of apertures of about 2.2 and a field of view of about 70.2 degrees. In addition, in the lens module 100 according to the present exemplary embodiment, all of the third lens 30 to the fifth lens 50 have a refractive index of about 1.640 and an Abbe number. It is 23.3.

In the present exemplary embodiment, the first lens 10 may have a positive refractive power. Further, the first surface (or object side surface) of the first lens 10 may be a convex surface, and the second surface (or image side surface) of the first lens 10 may be a concave surface. The second lens 20 may have a positive refractive power. Further, both surfaces of the second lens 20 may be convex. The third lens 30 may have a negative refractive power. Further, the first surface of the third lens 30 may be convex, and the second surface of the third lens 30 may be concave. The fourth lens 40 may have a positive refractive power. Further, the first surface of the fourth lens 40 may be a concave surface, and the second surface of the fourth lens 40 may be a convex surface. The fifth lens 50 may have a negative refractive power. Further, the first surface of the fifth lens 50 may be a concave surface, and the second surface of the fifth lens 50 may be a convex surface. The sixth lens 60 may have a negative refractive power. Further, the first surface of the sixth lens 60 may be a convex surface, and the second surface of the sixth lens 60 may be a concave surface. Additionally, the sixth lens 60 can have one or more inflection points. For example, the sixth lens 60 may have an inflection point formed on the second surface of the sixth lens 60. At the same time, the fourth lens 40 may be disposed close to the third lens 30. For example, the air gap between the fourth lens 40 and the third lens 30 may be smaller than the air gap between the fourth lens 40 and the fifth lens 50.

The lens module 100 according to the present exemplary embodiment may include one or more apertures ST. For example, the aperture ST may be disposed between the second lens 20 and the third lens 30. However, the aperture ST may be disposed in front of the first lens 10, disposed between the first lens 10 and the second lens 20, or disposed anywhere between the third lens 30 and the sixth lens 60.

The lens module configured as described above may have the optical aberration characteristics illustrated in FIG. 10 and may have the lens characteristics illustrated in FIGS. 11 and 12. Out For reference, FIG. 11 is a table showing the radius of curvature, the thickness of each lens, and the distance between lenses, the refractive index, and the Abbe number of the lens, and FIG. 12 is a table showing the aspherical surface values of the lenses.

The above exemplary embodiments may have the optical characteristics described in Table 1. Further, the above exemplary embodiment can satisfy the conditional expressions described on the left vertical column of Tables 2 to 4.

Table 5 below shows the effective radius of the sixth lens, and the positions of the object side surface formed on the sixth lens and the inflection point on the image side surface.

Table 6 below shows the convex points formed on the sixth lens and the thickness at the concave points.

According to some exemplary embodiments of the present disclosure, high resolution may be implemented.

While the exemplifying embodiments have been shown and described, it will be understood by those skilled in the art that modifications and changes can be made without departing from the spirit and scope of the disclosure as defined by the appended claims. .

10‧‧‧ first lens

20‧‧‧second lens

30‧‧‧ third lens

40‧‧‧Fourth lens

50‧‧‧ fifth lens

60‧‧‧ sixth lens

70‧‧‧Infrared cut filter

80‧‧‧Image Sensor

100‧‧‧ lens module

ST‧‧‧ aperture

Claims (39)

A lens module comprising: a first lens having positive refractive power; a second lens having positive refractive power; a third lens having refractive power; a fourth lens having positive refractive power; and a fifth lens having negative refractive power And a sixth lens having a negative refractive power and having one or more inflection points formed on an image side surface of the sixth lens, wherein a total focal length f of the lens module and the first lens The focal length f1 satisfies the following conditional expression: [conditional expression] 1.0 < f1/f < 2.0. The lens module according to claim 1, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface. The lens module of claim 1, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface. The lens module according to claim 1, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface. The lens module according to claim 1, wherein the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface. The lens module according to claim 1, wherein the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface. The lens module according to claim 1, wherein the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface. The lens module according to claim 1, wherein the sixth lens has a shape in which one or more inflection points are formed on an object side surface of the sixth lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] V1-V3>25.0, wherein V1 is an Abbe number of the first lens, and V3 is The Abbe number of the third lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [Conditional Formula] n4>1.6 wherein n4 is a refractive index of the fourth lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] V1-V5>25.0, wherein V1 is an Abbe number of the first lens, and V5 is The Abbe number of the fifth lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] 0.5 < f2 / f < 1.5, where f2 is a focal length of the second lens, and f is The total focal length of the lens module. The lens module of claim 1, wherein the lens module satisfies the following conditional formula: [Conditional Formula] 2.0<|f5/f|<100 where f5 is the focal length of the fifth lens, and f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] OAL/f<1.5, wherein OAL is from the object side surface of the first lens to the image surface The distance, and f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] 1.0 < f1/f2 < 2.5, where f1 is the focal length of the first lens, and F2 is the focal length of the second lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] 0.3 <|f2/f3|<2.0, where f2 is a focal length of the second lens, and F3 is the focal length of the third lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] BFL/f>0.2, wherein the BFL is from the image side surface of the sixth lens to The distance of the image surface, and f is the total focal length of the lens module. The lens module of claim 1, wherein the lens The module satisfies the following conditional expression: [Conditional Formula] D1/f>0.01 where D1 is an air gap between the first lens and the second lens, and f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] r1/f>0.3, where r1 is a radius of curvature of an object side surface of the first lens, And f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] r6/f>0.3, where r6 is a radius of curvature of an image side surface of the third lens, And f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] EPD/2/f1>0.1, wherein EPD/2 is the size of the entrance pupil, and f1 is Said focal length of the first lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression]|f3/f|<2.0, where f3 is a focal length of the third lens, and f is The total focal length of the lens module. The lens module of claim 1, wherein the lens The module satisfies the following conditional expression: [Conditional Formula] f4/f>3.0 where f4 is the focal length of the fourth lens, and f is the total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression]|f5/f|>3.0, where f5 is a focal length of the fifth lens, and f is The total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression]|f6/f|<6.0, where f6 is a focal length of the sixth lens, and f is The total focal length of the lens module. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] OAL/f1>0.5, wherein the OAL is from the object side surface of the first lens to the image surface The distance, and f1 is the focal length of the first lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional formula] 0 < OAL / f2 < 1.7 wherein OAL is from the object side surface of the first lens to The distance of the image surface, and f2 is the focal length of the second lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] | OAL / f3 | > 1.0 wherein OAL is from the object side surface of the first lens to The distance of the image surface, and f3 is the focal length of the third lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression] 0 < OAL / f4 < 0.5, wherein OAL is from the object side surface of the first lens to The distance of the image surface, and f4 is the focal length of the fourth lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [Conditional Formula]|OAL/f5|<0.5 wherein OAL is from the object side surface of the first lens to The distance of the image surface, and f5 is the focal length of the fifth lens. The lens module according to claim 1, wherein the lens module satisfies the following conditional expression: [conditional expression]|OAL/f6|>0.2 wherein OAL is from the object side surface of the first lens to The distance of the image surface, and f6 is the focal length of the sixth lens. A lens module includes: six lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side, wherein: The first lens and the second lens have a positive refractive power, the fifth lens includes a concave side surface and a convex image side surface, and the sixth lens faces the object at a center of the sixth lens The side is convex and concave toward the image side, the object side surface of the sixth lens has at least two inflection points, and the lens module satisfies the following conditional formula: 1.0<f1/f<2.0, where f is The total focal length of the lens module, and f1 is the focal length of the first lens. The lens module of claim 32, wherein a distance between the third lens and the fourth lens is shorter than a distance between the fourth lens and the fifth lens. The lens module of claim 32, further comprising an aperture disposed between the second lens and the third lens. The lens module of claim 32, wherein: the first lens and the third lens comprise a convex side surface and a concave image side surface, and the second lens comprises a biconvex surface, The fourth lens includes a concave side surface and a convex image side surface, and the image side surface of the sixth lens has at least one inflection point. The lens module according to claim 32, wherein the lens module satisfies the following conditional expression: |f1/f3|<3.0, where f1 is the focal length of the first lens, and f3 is the Third lens The focal length. The lens module of claim 32, wherein the lens module satisfies the following conditional formula: 0 < f1/f4 < 1.5, where f1 is the focal length of the first lens, and f4 is the The focal length of the fourth lens. The lens module of claim 32, wherein the lens module satisfies the following conditional expression: |f1/f5|<1.5, where f1 is the focal length of the first lens, and f5 is the The focal length of the fifth lens. The lens module of claim 32, wherein the lens module satisfies the following conditional expression: |f1/f6|<1.5, where f1 is the focal length of the first lens, and f6 is the The focal length of the sixth lens.