KR102415126B1 - Telephoto lens unit, camera module and electronics - Google Patents

Abstract

The present invention discloses a telephoto lens unit, a camera module, and an electronic device. The telephoto lens unit of the embodiment of the present invention includes, in order from the object side to the image along the optical axis, a first lens, a second lens, a third lens having negative refractive power, a fourth lens, and a fifth lens, The first lens is a lens having a meniscus shape in which the object-side surface is a convex surface. The fourth lens is a lens having a meniscus shape in which an image side surface is a convex surface. The telephoto lens unit, camera module, and electronic device of the embodiment of the present invention can realize ultra-thinning of the telephoto lens unit under the premise of higher image quality and lower aperture value through a reasonable lens configuration, thereby contributing to the miniaturization of the telephoto lens unit. It is advantageous.

Description

TELEPHOTO LENS UNIT, CAMERA MODULE AND ELECTRONICS

The present invention relates to optical imaging technology, and more particularly to a telephoto lens unit, a camera module, and an electronic device.

Usually, the telephoto lens unit is usually larger in volume for higher image quality and lower aperture value, making it difficult to realize downsizing.

An implementation manner of the present invention provides a telephoto lens unit, a camera module, and an electronic device.

The telephoto lens unit of the embodiment of the present invention includes, in order from the object side to the image side along an optical axis, a first lens, a second lens, a third lens having negative refractive power, a fourth lens, and a fifth lens, The first lens is a meniscus lens in which the object-side surface is a convex surface. The fourth lens is a lens having a meniscus shape in which an image side surface is a convex surface.

The telephoto lens unit of the implementation method of the present invention can realize the ultra-thin telephoto lens unit as well as higher imaging quality and lower aperture value through a reasonable lens configuration, thereby reducing the size of the telephoto lens unit. advantageous to

In some implementations, the telephoto lens unit satisfies the conditional expression 0.5<|f1/f|<1.5; Here, f is the focal length of the telephoto lens unit, and f1 is the focal length of the first lens.

When the telephoto lens unit satisfies the conditional expression 0.5<|f1/f|<1.5, the first lens can provide a refractive power suitable for the telephoto lens unit, which is advantageous for optimizing the sensitivity and aberration of the telephoto lens unit and improving image quality .

In some implementation manners, the telephoto lens unit also satisfies the conditional expression |R1/R2|<1.0; Here, R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens.

When the telephoto lens unit satisfies the conditional expression |R1/R2|<1.0, since the first lens has a suitable size, it is advantageous for manufacturing the first lens and assembling the telephoto lens unit. In addition, by rationally distributing the radius of curvature of the object-side surface and the image-side surface of the first lens, it is possible to maintain the aberration balance of the telephoto lens unit and improve the imaging quality of the telephoto lens unit.

In some implementation manners, the telephoto lens unit also satisfies the conditional expression TTL/f<2; Here, f is the focal length of the telephoto lens unit, and TTL is the distance from the object-side surface to the imaging surface on the optical axis of the first lens.

When the telephoto lens unit satisfies the conditional expression TTL/f<2, the telephoto lens unit has a shorter TTL to reduce the length of the telephoto lens unit.

In some implementation manners, the telephoto lens unit also satisfies the conditional expression 0.8<TTL/f<1; Here, f is the focal length of the telephoto lens unit, and TTL is the distance from the object-side surface to the imaging surface on the optical axis of the first lens.

When a telephoto lens unit satisfies conditional expression 0.8<TTL/f<1, compared to a telephoto lens unit that satisfies conditional expression TTL/f<2, a telephoto lens unit satisfying conditional expression 0.8<TTL/f<1 has a shorter TTL , so that the length of the telephoto lens unit can be further reduced.

In some implementation manners, the telephoto lens unit further includes an aperture installed on the object-side surface of the first lens.

The telephoto lens unit can improve the imaging effect by better controlling the amount of light incident through a reasonable diaphragm installation.

In some implementations, the telephoto lens unit further includes a prism, wherein the prism, the first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged along the optical axis. installed, and the prism reflects the light beam and reflects the light beam incident on the prism to the first lens.

By changing the reflection direction of the light beam through the prism, it is possible to put the telephoto lens unit in parallel (equivalent to placing it upside down compared to placing it vertically), realizing a periscopic structure, thereby reducing the thickness of the device mounting the telephoto lens unit. have.

In some implementation manners, at least one of the first to fifth lenses has an aspherical surface.

The telephoto lens unit can effectively reduce the overall length of the telephoto lens unit by adjusting the radius of curvature and the aspheric coefficient of the lens surface, and the use of a multi-dimensional surface shape can effectively correct the aberration of the telephoto lens unit and improve the imaging quality. .

The camera module of the embodiment of the present invention includes the telephoto lens unit and the photosensitive element of any one of the embodiments described above. The photosensitive element is installed above the telephoto lens unit.

The camera module of the implementation method of the present invention not only allows the telephoto lens unit to have higher image quality and lower aperture value through a reasonable lens configuration, but also enables ultra-thinning of the telephoto lens unit, which is advantageous for miniaturization of the telephoto lens unit do.

The electronic device of the implementation method of the present invention includes the case and the camera module of the implementation method described above. The camera module is mounted on the case.

The electronic device of the embodiment of the present invention not only allows the telephoto lens unit to have higher image quality and lower aperture value through a reasonable lens configuration, but also enables ultra-thinning of the telephoto lens unit, which is advantageous for miniaturization of the telephoto lens unit do. And the case acts to protect the camera module.

Additional aspects and advantages of modes of implementation of the invention will be given in part in the description which follows, in part will become apparent from the description or will be learned by practice of the invention.

The above and/or additional aspects and advantages of the present invention may become clearer and easier to understand through the description of the implementation manner in conjunction with the accompanying drawings below, wherein:
1 is a structural schematic diagram of a telephoto lens unit having a prism of a first embodiment of the present invention;
Fig. 2 is a structural schematic diagram of a telephoto lens unit without a prism of the first embodiment of the present invention;
Fig. 3 is a graph of the diffraction modulation transfer function of the telephoto lens unit of the first embodiment of the present invention;
4 to 6 are a longitudinal aberration graph (mm), a curvature of field graph (mm), and a distortion graph (%) of the telephoto lens unit of the first embodiment, respectively.
Fig. 7 is a structural schematic diagram of a telephoto lens unit of a second embodiment of the present invention;
Fig. 8 is a graph of the diffraction modulation transfer function of the telephoto lens unit of the second embodiment of the present invention;
9 to 11 are longitudinal aberration graphs (mm), field curvature graphs (mm) and distortion graphs (%) of the telephoto lens unit of the second embodiment, respectively.
Fig. 12 is a structural schematic diagram of a telephoto lens unit of a third embodiment of the present invention;
Fig. 13 is a graph of the diffraction modulation transfer function of the telephoto lens unit according to the third embodiment of the present invention;
14 to 16 are longitudinal aberration graphs (mm), field curvature graphs (mm) and distortion graphs (%) of the telephoto lens unit of the third embodiment, respectively.
17 is a structural schematic diagram of a camera module in an implementation manner of the present invention.
18 is a structural schematic diagram of an electronic device in an implementation manner of the present invention.

Hereinafter, the embodiment of the present invention will be described in detail, examples of the implementation manner are shown in the accompanying drawings, wherein the same or similar reference numerals consistently indicate the same or similar elements or elements having the same or similar functions. . The implementation manner described with reference to the accompanying drawings below is exemplary, and is only for interpreting the present invention and should not be construed as a limitation on the present invention.

In the description of the present invention, it should be understood that the terms 'center', 'longitudinal', 'transverse', 'length', 'width', 'thickness', 'top', 'bottom (bottom)' )', 'Before', 'After', 'Left', 'Right', 'Vertical', 'Horizontal', 'Top', 'Low' )', 'inside (內)', 'outside (outside)', 'clockwise', 'counterclockwise', etc. indicates the orientation or positional relationship according to the orientation or positional relationship shown in the accompanying drawings, and the present invention It is for convenience and simplicity of description, and does not point or imply that the pointing device or element must have a specified orientation or be constructed or operated according to the specified orientation, so it is not intended to be used in the present invention It should not be construed as a limitation on In addition, the terms 'first' and 'second' are for illustrative purposes only, and should not be construed as indicating or implying relative importance or implying or specifying the quantity of the indicated technical feature. Accordingly, a feature defined as 'first' or 'second' may explicitly or implicitly include one or more of the aforementioned features. In the description of the present invention, the meaning of 'plural' is two or more than two, unless otherwise clearly and specifically limited.

In the description of the present invention, what is intended to be described is that, unless otherwise clearly defined or limited, the terms 'mounting', 'interconnection', and 'connection' should be understood in a broad sense, for example, fixed connection , may be a detachable connection or an integral connection; may be a mechanical connection, an electrical connection, or a mutual communication; It may be a direct connection, an indirect connection through an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meaning of the above-mentioned terms in the present invention according to specific circumstances.

In the present invention, unless otherwise clearly defined or limited, the fact that the first feature is 'above' or 'below' the second feature may include a case where the first feature and the second feature come into direct contact with each other. A case in which the first feature and the second feature do not directly contact but contact through their separate features may be included. Further, that a first feature is 'above', 'above' or 'above' a second feature includes the case where the first feature is directly above or obliquely above the second feature, or simply is of the first feature. It indicates that the horizontal height is higher than the second characteristic. that the first feature is 'below', 'below' or 'under' the second feature includes the case where the first feature is directly below or obliquely below the second feature, or simply the horizontal height of the first feature is lower than the second characteristic.

In the disclosure to be described later, many different implementation manners or examples are provided to implement different structures of the present invention. In order to simplify the disclosure of the present invention, in the following description will be described with respect to the parts and installation of a specific example. Of course, this is only an example, and is not intended to limit the present invention. In addition, parameter numbers and/or parameter letters in the present invention may be duplicated in different instances, such redundancy is for the sake of simplicity and clarity, as such, between the various implementations and/or installations being discussed. It doesn't refer to a relationship. Furthermore, since the present invention provides several specific examples of processes and materials, those skilled in the art will contemplate other process applications and/or use of other materials.

1, 2, 7 and 12, the telephoto lens unit 10 of the embodiment of the present invention sequentially from the object side to the image side along the optical axis, the first lens L1, the second lens (L2), and a third lens (L3), a fourth lens (L4), and a fifth lens (L5) having a negative refractive power.

The first lens L1 has an object-side surface S1 and an image-side surface S2, and the first lens L1 is a meniscus-shaped lens in which the object-side surface S1 is a convex surface, that is, the object. The side surface S1 is a convex surface and the upper side surface S2 is a concave surface. The second lens L2 has an object-side surface S3 and an image-side surface S4. The third lens L3 has an object-side surface S5 and an image-side surface S6. The fourth lens L4 has an object-side surface S7 and an image-side surface S8, and the fourth lens L4 is a meniscus-shaped lens in which the image-side surface S8 is a convex surface, that is, the object-side surface. The surface S7 is a concave surface and the upper surface S8 is a convex surface. The fifth lens L5 has an object-side surface S9 and an image-side surface S10 .

The telephoto lens unit 10 of the implementation method of the present invention not only allows the telephoto lens unit 10 to have higher image quality and lower aperture value through a reasonable lens configuration, but also makes the telephoto lens unit 10 ultra-thin. It can be implemented, which is advantageous for miniaturization of the telephoto lens unit 10 .

In some implementation manners, the telephoto lens unit 10 also satisfies the conditional expression 0.5<|f1/f|<1.5; Here, f is the focal length of the telephoto lens unit 10 , and f1 is the focal length of the first lens L1 . In other words, |f1/f| may be any value within the interval (0.5, 1.5), for example, the value may be 0.646, 0.679, 0.985, 1.099, 1.356, or the like.

When the telephoto lens unit 10 satisfies the conditional expression 0.5<|f1/f|<1.5, the first lens L1 can provide a refractive power suitable for the telephoto lens unit 10 and thus the sensitivity of the telephoto lens unit 10 . It is advantageous for reducing and optimizing aberration and improving image quality.

In some implementation manners, the telephoto lens unit 10 also satisfies the conditional expression |R1/R2|<1.0, where R1 is the radius of curvature of the object-side surface S1 of the first lens L1 and R2 is the first lens ( The radius of curvature of the upper surface S2 of L1). In other words, |R1/R2| may be any value less than 1.0, for example, the value may be 0.286, 0.302, 0.406, 0.602, 0.977, or the like.

When the telephoto lens unit 10 satisfies the conditional expression |R1/R2|<1.0, since the first lens L1 has a suitable size, processing of the first lens L1 and assembly of the telephoto lens unit 10 advantageous to In addition, by rationally distributing the radius of curvature of the object-side surface S1 and the image-side surface S2 of the first lens L1, the aberration balance of the telephoto lens unit 10 is balanced and the imaging quality of the telephoto lens unit 10 can improve

In some implementation manners, the telephoto lens unit 10 also satisfies the conditional expression TTL/f<2; Here, f is the focal length of the telephoto lens unit 10, and TTL is the distance from the object-side surface S1 to the imaging surface S13 on the optical axis of the first lens L1. In other words, TTL/f may be any value less than 2, for example, the value may be 0.883, 0.926, 1.004, 1.356, 1.586, and the like.

When the telephoto lens unit 10 satisfies the conditional expression TTL/f<2, the telephoto lens unit 10 has a shorter TTL to reduce the length of the telephoto lens unit 10 .

In some implementation manners, the telephoto lens unit 10 also satisfies the conditional expression 0.8<TTL/f<1; Here, f is the focal length of the telephoto lens unit 10, and TTL is the distance from the object-side surface S1 to the imaging surface S13 on the optical axis of the first lens L1. In other words, TTL/f may be any value within the interval (0.8, 1), for example, the value may be 0.815, 0.856, 0.883, 0.926, 0.978, and the like.

When the telephoto lens unit 10 satisfies the conditional expression 0.8<TTL/f<1, compared to the telephoto lens unit 10 satisfying the conditional expression TTL/f<2, telephoto which satisfies the conditional expression 0.8<TTL/f<1 Since the lens unit 10 has a shorter TTL, the length of the telephoto lens unit 10 can be further reduced.

In some implementation manners, the telephoto lens unit 10 further includes an optical filter L6 . The optical filter L6 is installed between the fifth lens L5 and the imaging surface S13. In an implementation manner of the present invention, the optical filter L6 is an infrared filter L6, the infrared filter L6 includes an object side surface S11 and an upper surface S12, and the infrared filter L6 emits infrared rays. for filtering. When the telephoto lens unit 10 is used for imaging, the light rays emitted or reflected by the subject are incident on the telephoto lens unit 10 from the object-side direction and sequentially the first lens L1, the second lens L2, The light passes through the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared filter L6, and is finally condensed on the image forming surface S13. The infrared filter L6 filters and removes the influence of infrared rays in the ambient light on the image formation and allows only visible light to pass through, thereby improving the imaging quality of visible light.

In some implementations, the stop STO may be an aperture stop or a field stop. In the implementation method of the present invention, the case where the stop STO is an aperture stop will be described as an example. The diaphragm STO is installed between the subject and the first lens L1, installed on any one lens surface, installed between any two lenses, or between the fifth lens L5 and the infrared filter L6. can be installed. The diaphragm STO of the embodiment of the present invention is installed on the object-side surface S3 of the second lens L2. For example, in the first to third embodiments, the diaphragm STO is all installed on the object-side surface S1 of the first lens L1, which has an imaging effect by better controlling the amount of light incident. can improve

In some implementation manners, the telephoto lens unit 10 includes a prism L7, a bar prism L7, a first lens L1, a second lens L2, a third lens L3, and a fourth lens ( L4) and the fifth lens L5 are sequentially installed along the optical axis, and the prism L7 reflects the light beam and reflects the light beam incident on the prism L7 to the first lens L1. For example, the prism L7 may reflect light rays incident on the prism L7 perpendicular to the optical axis to the first lens L1 in parallel to the optical axis. Since the prism L7 can change the reflection direction of the light beam, it is possible to put the telephoto lens unit 10 in parallel (equivalent to placing it upside down compared to placing it vertically), thereby realizing a permeable structure, thereby reducing the telephoto lens unit 10 It is possible to reduce the thickness of the device to be mounted.

In some implementation manners, the first lens L1 to the fifth lens L5 are plastic lenses or glass lenses.

The plastic lens has a lower cost, which is advantageous in lowering the cost of the entire telephoto lens unit 10, whereas the glass lens does not easily cause thermal expansion and thermal contraction due to changes in environmental temperature, so that the imaging quality of the telephoto lens unit 10 is more stable. make it

으로 결정되는바; 여기서 Z는 비구면 위의 임의의 한 점에서 표면 정점까지의 종방향 거리이고, r은 비구면 위의 임의의 한 점에서 광축까지의 거리이고, c는 정점 곡률(곡률 반경의 역수)이고, k는 원추(Conic) 상수이고, Ai는 비구면 제i-th계의 수정 계수이다. In some implementation manners, at least one surface of the first lens L1 to the fifth lens L5 in the telephoto lens unit 10 is aspherical. For example, in the first to third embodiments, the object-side surface and the image-side surface of the first lens L1 to fifth lens L5 are both aspherical surfaces. The surface shape of an aspherical surface is the formula

to be determined; where Z is the longitudinal distance from any point on the aspherical surface to the vertex of the surface, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the reciprocal of the radius of curvature), and k is It is a conic constant, and Ai is a correction coefficient of the aspherical i-th system.

Accordingly, the telephoto lens unit 10 can effectively reduce the overall length of the telephoto lens unit 10 by adjusting the radius of curvature and the aspheric coefficient of each lens surface and effectively correct aberrations, thereby improving the imaging quality. .

first embodiment

1 to 6 , from the object side to the image side, the telephoto lens unit 10 of the first embodiment has a prism L7, a first lens L1, a diaphragm STO, and a second It includes a lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and an infrared filter L6 .

The prism L7 is for changing the reflection direction of the light beam so that the light beam incident on the prism L7 perpendicular to the optical axis is incident on the first lens L1 parallel to the optical axis. The material of the prism L7 may be a material such as glass or plastic having high light transmittance.

The first lens L1 has positive refractive power, its object-side surface S1 is convex, its image-side surface S2 is concave, and its object-side surface S1 and image-side surface S2 are both aspherical . The second lens L2 has positive refractive power, and its object-side surface S3 is convex, its image-side surface S4 is concave, and its object-side surface S3 and image-side surface S4 are both aspherical. The third lens L3 has negative refractive power, and its object-side surface S5 is concave, its image-side surface S6 is concave, and its object-side surface S5 and image-side surface S6 are both aspherical. The fourth lens L4 has positive refractive power, and its object-side surface S7 is a concave surface, its image-side surface S8 is a convex surface, and both the object-side surface S7 and the image-side surface S8 are aspherical. The fifth lens L5 has negative refractive power, and its object-side surface S9 is a concave surface, its image-side surface S10 is a convex surface, and both the object-side surface S9 and the image-side surface S10 are aspherical.

The infrared filter L6 is made of glass, which is installed between the fifth lens L5 and the imaging plane S13 and does not affect the focal length of the telephoto lens unit 10 .

The effective focal length of the telephoto lens unit 10 is f=10.30 mm. The aperture number of the telephoto lens unit 10 is FNO=2.7. The angle of view of the telephoto lens unit 10 is FOV=26.5 degrees. The optical overall length of the telephoto lens unit 10 (that is, the distance from the object-side surface S1 to the imaging surface S13 on the optical axis of the first lens L1) is TTL=9.100 mm. The length of the diagonal of the photosensitive element (shown in Fig. 17) is 2y = 5.000 mm.

The optical back focal length of the telephoto lens unit 10 is BFL=2.520 mm. The mechanical back focal length of the telephoto lens unit 10 is FFL=-10.249 mm. The image height distortion of the telephoto lens unit 10 is IMG DIS=2.520 mm. The maximum imaging height of the imaging plane S15 in the telephoto lens unit 10 is HT=2.517 mm. The mechanical field of view of the telephoto lens unit 10 is ANG=13.734 degrees. In the entrance pupil of the telephoto lens unit 10, the aperture is DIA1 = 3.815 mm and the thickness is THI1 = 4.623 mm. In the exit pupil of the telephoto lens unit 10, the aperture is DIA2 = 2.642 mm and the thickness is THI2 = -4.614 mm.

The telephoto lens unit 10 also has the condition |f1/f|=0.679; |R1/R2|=0.406; TTL/f=0.883 is satisfied.

The telephoto lens unit 10 satisfies the conditions in the table below.

first embodiment f=10.30m, FNO=2.7, FOV=26.5 degree surface number surface designation surface shape Y radius (mm) Thickness (mm) refractive index Abbesu Focal length (mm) 0 subject spherical infinite infinite One prism 2/aperture first lens aspheric 2.484 1.200 1.535 56.3 7.00 3 aspheric 6.114 0.509 4 second lens aspheric 4.297 0.630 1.535 56.3 8.40 5 aspheric 88.206 0.285 6 third lens aspheric -14.301 0.350 1.659 20.4 -4.32 7 aspheric 3.634 1.676 8 4th lens aspheric -8.944 0.720 1.659 20.4 5.74 9 aspheric -2.763 0.060 10 5th lens aspheric -2.580 0.350 1.544 56.1 -5.41 11 aspheric -21.291 0.500 12 infrared filter spherical infinite 0.300 1.517 64.2 13 spherical infinite 2.520 14 image plane spherical infinite 0.000

first embodiment side sequence 2 3 4 5 6 K -3.09E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 8.79E-04 -3.97E-03 -7.70E-03 -1.68E-02 -1.00E-02 A6 -1.14E-04 -2.30E-03 -4.35E-03 -4.53E-03 6.28E-04 A8 -8.96E-05 8.93E-05 -4.13E-04 9.52E-04 4.19E-05 A10 -2.07E-05 -1.28E-05 -5.05E-05 5.57E-04 1.38E-03 A12 1.05E-05 -8.64E-06 1.40E-04 1.30E-04 -2.99E-04 A14 -4.20E-06 5.09E-07 7.84E-05 -6.11E-06 -8.44E-05 A16 -1.26E-07 1.75E-07 -2.19E-05 -2.11E-05 -1.30E-05 side sequence 7 8 9 10 11 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 1.77E-02 -9.01E-03 1.65E-02 6.17E-03 -2.30E-02 A6 4.41E-03 -1.10E-02 -2.15E-02 -2.50E-03 1.40E-02 A8 1.96E-03 -1.42E-03 4.00E-03 3.67E-03 -3.26E-03 A10 -3.57E-04 1.47E-03 -3.63E-05 -9.43E-04 2.33E-04 A12 -6.09E-05 -1.40E-03 -2.89E-04 1.70E-04 9.36E-06 A14 8.73E-04 5.59E-05 2.59E-05 3.94E-05 5.60E-06 A16 -3.68E-04 9.46E-05 7.23E-06 -1.53E-05 -1.59E-06

second embodiment

7 to 11 , from the object side to the image side, the telephoto lens unit 100 of the second embodiment sequentially includes a first lens L1, an aperture STO, a second lens L2, and a third lens. It includes (L3), a fourth lens (L4), a fifth lens (L5), and an infrared filter (L6).

The first lens L1 has positive refractive power, and its object-side surface S1 is convex, its image-side surface S2 is concave, and its object-side surface S1 and image-side surface S2 are both aspherical. The second lens L2 has positive refractive power, its object-side surface S3 is a convex surface, its image-side surface S4 is a concave surface, and its object-side surface S3 and image-side surface S4 are both aspherical . The third lens L3 has negative refractive power, its object-side surface S5 is concave, its image-side surface S6 is concave, and its object-side surface S5 and image-side surface S6 are both aspherical . The fourth lens L4 has positive refractive power, and its object-side surface S7 is concave, its image-side surface S8 is convex, and its object-side surface S7 and image-side surface S8 are both aspherical . The fifth lens L5 has a negative refractive power, its object-side surface S9 is concave, its image-side surface S10 is a convex surface, and its object-side surface S9 and image-side surface S10 are both aspherical .

The infrared filter L6 is made of glass, which is installed between the fifth lens L5 and the imaging plane S13 and does not affect the focal length of the telephoto lens unit 10 .

The telephoto lens unit 10 satisfies the conditions in the table below.

second embodiment f=10.80mm, FNO=2.6, FOV=25.5 degree surface number surface designation surface shape Y radius (mm) Thickness (mm) refractive index Abbesu Focal length (mm) 0 subject spherical infinite infinite One One spherical infinite 0.00 2/aperture first lens aspheric 2.810 1.400 1.535 56.3 6.98 3 aspheric 9.314 0.773 4 second lens aspheric 4.650 0.647 1.535 56.3 8.90 5 aspheric 170.141 0.191 6 third lens aspheric -8.660 0.900 1.659 20.4 -3.68 7 aspheric 3.557 1.039 8 4th lens aspheric -6.593 0.840 1.659 20.4 5.66 9 aspheric -2.518 0.030 10 5th lens aspheric -2.633 0.433 1.544 56.1 -7.01 11 aspheric -8.933 0.500 12 infrared filter spherical infinite 0.300 1.517 64.2 13 spherical infinite 2.948 14 image plane spherical infinite 0.000

second embodiment side sequence 2 3 4 5 6 K -3.02E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 7.22E-04 -2.14E-03 -6.52E-03 -1.67E-02 -7.11E-03 A6 -8.38E-05 -1.73E-03 -4.45E-03 -5.16E-03 7.41E-04 A8 -6.37E-05 1.06E-04 -2.10E-04 9.27E-04 -5.44E-04 A10 -1.90E-05 -6.54E-06 -2.04E-04 5.72E-04 1.32E-03 A12 1.20E-05 -6.68E-06 8.38E-05 1.25E-04 -2.11E-04 A14 -3.38E-06 7.26E-07 7.61E-05 -7.73E-06 -4.69E-05 A16 1.72E-07 5.87E-08 -1.56E-05 -1.92E-05 -1.30E-05 side sequence 7 8 9 10 11 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 1.87E-02 -1.19E-02 1.28E-02 3.27E-03 -2.13E-02 A6 4.08E-03 -1.13E-02 -1.86E-02 -8.23E-04 1.22E-02 A8 1.37E-03 -2.53E-03 4.36E-03 3.94E-03 -3.37E-03 A10 1.99E-04 1.86E-03 1.44E-04 -1.11E-03 2.88E-04 A12 -6.09E-05 -8.61E-04 -3.35E-04 1.25E-04 1.49E-05 A14 8.73E-04 5.59E-05 3.48E-05 4.12E-05 5.78E-06 A16 -3.68E-04 9.46E-05 7.23E-06 -9.72E-06 -1.40E-06

According to Table 3 and Table 4, the following data can be obtained.

third embodiment

12 to 16 , from the object side to the image side, the telephoto lens unit 100 of the second embodiment sequentially includes a first lens L1, an aperture STO, a second lens L2, and a third lens. ( L3 ), a fourth lens ( L4 ), a fifth lens ( L5 ), and an infrared filter ( L6 ).

The first lens L1 has positive refractive power, and its object-side surface S1 is convex, its image-side surface S2 is concave, and its object-side surface S1 and image-side surface S2 are both aspherical. The second lens L2 has positive refractive power, its object-side surface S3 is a convex surface, its image-side surface S4 is a convex surface, and its object-side surface S3 and image-side surface S4 are both aspherical . The third lens L3 has negative refractive power, its object-side surface S5 is concave, its image-side surface S6 is concave, and its object-side surface S5 and image-side surface S6 are both aspherical . The fourth lens L4 has positive refractive power, and its object-side surface S7 is concave, its image-side surface S8 is convex, and its object-side surface S7 and image-side surface S8 are both aspherical . The fifth lens L5 has negative refractive power, and its object-side surface S9 is concave, its image-side surface S10 is concave, and its object-side surface S9 and image-side surface S10 are both aspherical .

The infrared filter L6 is made of glass, which is installed between the fifth lens L5 and the imaging plane S13 and does not affect the focal length of the telephoto lens unit 10 .

The telephoto lens unit 10 satisfies the conditions in the table below.

third embodiment f=9.26mm, FNO=2.4, FOV=31.0 degree surface number surface designation surface shape Y radius (mm) Thickness (mm) refractive index Abbesu Focal length (mm) 0 subject spherical infinite infinite One One spherical infinite 0.000 2/aperture first lens aspheric 2.691 1.220 1.535 56.3 10.18 3 aspheric 4.467 0.417 4 second lens aspheric 3.582 1.016 1.535 56.3 5.38 5 aspheric -13.405 0.111 6 third lens aspheric -11.445 0.555 1.659 20.4 -4.48 7 aspheric 4.109 0.689 8 4th lens aspheric -5.031 0.840 1.659 20.4 8.04 9 aspheric -2.766 0.030 10 5th lens aspheric -9.812 0.993 1.544 56.1 -7.09 11 aspheric 6.617 0.500 12 infrared filter spherical infinite 0.300 1.517 64.2 13 spherical infinite 2.629 14 image plane spherical infinite 0.000

third embodiment side sequence 2 3 4 5 6 K -3.51E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 -2.49E-04 -1.01E-02 -9.08E-03 -2.35E-03 2.55E-03 A6 -2.23E-04 -2.05E-03 -4.48E-03 -5.78E-03 9.21E-04 A8 -1.47E-05 8.73E-05 6.40E-04 5.10E-04 -1.77E-03 A10 -2.58E-05 2.57E-05 -2.98E-04 4.69E-04 8.11E-04 A12 8.48E-06 3.31E-06 2.73E-05 5.32E-05 -4.81E-05 A14 -3.85E-06 2.36E-06 7.03E-05 -2.47E-05 4.13E-05 A16 5.51E-07 1.25E-07 -1.24E-05 -4.08E-06 -2.77E-05 side sequence 7 8 9 10 11 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 1.58E-02 1.25E-02 1.04E-02 -5.16E-02 -5.00E-02 A6 4.12E-03 -6.73E-03 -9.19E-03 -7.00E-05 1.32E-02 A8 -1.13E-03 -7.64E-03 1.03E-03 4.32E-03 -3.10E-03 A10 1.01E-03 5.14E-03 1.50E-04 -1.34E-03 5.14E-04 A12 -2.30E-03 -2.38E-03 -2.12E-04 1.99E-04 -2.05E-05 A14 1.65E-03 5.59E-05 2.30E-05 1.06E-04 -1.02E-05 A16 -3.68E-04 9.46E-05 1.49E-05 -2.95E-05 1.26E-06

According to Table 5 and Table 6, the following data can be obtained.

Referring to FIG. 17 , the camera module 100 of the implementation method of the present invention includes the telephoto lens unit 10 and the photosensitive element 20 of any one implementation method described above. The photosensitive element 20 is installed above the telephoto lens unit 10 .

Specifically, as the photosensitive device 20 , a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor may be applied.

The camera module 100 of the embodiment of the present invention not only enables the telephoto lens unit 10 to have higher image quality and a lower aperture value through a reasonable lens configuration, but also implements ultra-thinning of the telephoto lens unit 10 . This is advantageous in miniaturization of the telephoto lens unit 10 .

17 and 18 simultaneously, the electronic device 1000 includes the case 200 and the camera module 100 of the above-described implementation method. The camera module 100 is mounted on the case 200 to acquire an image.

The electronic device 1000 according to the embodiment of the present invention not only enables the telephoto lens unit 10 to have a higher imaging quality and a lower aperture value through a reasonable lens configuration, but also realizes ultra-thinning of the telephoto lens unit 10 . This is advantageous in miniaturization of the telephoto lens unit 10 . And the case 200 serves to protect the camera module 100 .

The electronic device 100 of the embodiment of the present invention includes information such as a smart phone, a mobile phone, a personal digital assistant (PDA), a game machine, a personal computer (PC), a camera, a smart watch, a tablet computer, etc. It includes, but is not limited to, a terminal device or a home appliance having an imaging function.

In the description of this specification, according to the reference terms 'some implementation manners', 'one implementation manner', 'some implementation manners', 'exemplary implementation manners', 'examples', 'specific examples', or 'some examples', etc. Description means that a specific feature, structure, material, or characteristic point described in connection with the above implementation manner or example is included in at least one implementation manner or example of the present invention. In this specification, exemplary descriptions of the above terms do not necessarily refer to the same implementation manner or example. Further, the described specific features, structures, materials, or feature points are combinable in any one or multiple manners of implementation or in any suitable manner in the examples.

In addition, the terms 'first' and 'second' are for illustrative purposes only, and should not be construed as indicating or implying relative importance or implying or specifying the quantity of the indicated technical feature. Accordingly, the features defined as 'first' and 'second' may explicitly or implicitly include at least one of the above features. In the description of the present invention, the meaning of 'plural' is at least two, for example, two or three, unless otherwise clearly and specifically limited.

Although the above has already been presented and described with respect to the implementation manner of the present invention, the above implementation manner is exemplary and should not be construed as a limitation on the present invention, and those skilled in the art can change the implementation manner described above within the scope of the present invention. , modifications, substitutions and variations are possible, and it should be understood that the scope of the present invention is limited by the claims and their equivalents.

Claims (10)

In the telephoto lens unit,
In order from the object side to the upper side along the optical axis,
a first lens, wherein the first lens is a meniscus-shaped lens in which an object-side surface is a convex surface;
a second lens;
a third lens having negative refractive power;
a fourth lens, wherein the fourth lens is a meniscus-shaped lens in which an image-side surface is a convex surface; and
a fifth lens; including,
the telephoto lens unit satisfies the conditional expression 0.8<TTL/f<1;
where f is the focal length of the telephoto lens unit, and TTL is the distance from the object-side surface to the imaging surface in the optical axis of the first lens,
A telephoto lens unit, characterized in that. According to claim 1,
the telephoto lens unit satisfies the conditional expression 0.5<|f1/f|<1.5;
where f is the focal length of the telephoto lens unit, and f1 is the focal length of the first lens,
A telephoto lens unit, characterized in that. According to claim 1,
the telephoto lens unit satisfies the conditional expression |R1/R2|<1.0;
where R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens,
A telephoto lens unit, characterized in that. According to claim 1,
Further comprising an aperture installed on the object-side surface of the first lens,
A telephoto lens unit, characterized in that. According to claim 1,
further comprising a prism,
The prism, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially installed along an optical axis, and the prism reflects the light beam and receives the light beam incident on the prism. for reflecting to the first lens,
A telephoto lens unit, characterized in that. According to claim 1,
At least one of the first to fifth lenses has an aspherical surface,
A telephoto lens unit, characterized in that. In the camera module,
The telephoto lens unit of any one of claims 1 to 6; and
a photosensitive element installed on an upper side of the telephoto lens unit; containing,
A camera module, characterized in that. In an electronic device,
case; and
The camera module of claim 7; including,
The camera module is mounted on the case,
Electronic device, characterized in that.
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