CN111999858B

CN111999858B - Lens assembly, camera module and electronic device

Info

Publication number: CN111999858B
Application number: CN202010954599.8A
Authority: CN
Inventors: 韦怡
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2022-12-02
Anticipated expiration: 2040-09-11
Also published as: CN111999858A; WO2022052629A1

Abstract

The application discloses a lens group, a camera module and an electronic device. The lens group includes, from an object side to an image side, a first lens having a negative refractive power, an object side surface of the first lens being a plane, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a refractive power, a sixth lens having a refractive power, and the lens group satisfies the following relational expressions, fno <3.0, TTL/ih <2.2, and an angle of view ω > 150.0. Wherein, fno is the f-number of the lens group, TTL is the total length of the lens group, and ih is the image plane height of the lens group. The lens group of the embodiment of the application enables the angle of field to be larger than 150.0 degrees through reasonable lens configuration, so that the lens group has an ultra-large angle of field, and can cause a strong perspective effect when shooting a shot object, and a shot picture has large visual impact.

Description

Lens group, camera module and electronic device

Technical Field

The present disclosure relates to optical imaging technologies, and particularly to a lens assembly, a camera module and an electronic device.

Background

At present, an ultra-wide-angle lens (the field angle ω is over 100 °) is popular with consumers due to its ultra-wide field angle and ultra-depth of field, and a wide-angle lens (main camera) and a telephoto lens become one of the lenses essential for mobile phones.

However, the perspective of the shot picture of the existing ultra-large wide-angle lens is weak, the resolution ratio is low, and the user experience is directly reduced.

Disclosure of Invention

The embodiment of the application provides a lens group, a camera module and an electronic device.

The lens group according to the embodiment includes, from an object side to an image side, a first lens element having a negative refractive power, an object-side surface of the first lens element being flat, a second lens element having a positive refractive power, a third lens element having a negative refractive power, a fourth lens element having a positive refractive power, a fifth lens element having a refractive power, and a sixth lens element having a refractive power, and the lens group satisfies the following relation: fno <3.0, TTL/ih <2.2, and an angle of view omega >150.0 degrees, wherein Fno is the diaphragm number of the lens group, TTL is the total length of the lens group, and ih is the image surface height of the lens group.

The camera module according to the embodiment of the present application includes the lens assembly according to the above embodiment and a photosensitive element disposed at an image side of the lens assembly.

The electronic device comprises a shell and the camera module, wherein the camera module is installed on the shell.

Through reasonable lens configuration among the lens group of this application embodiment, camera module and the electron device, make the angle of field can be greater than 150.0, so make the lens group have the super large angle of field, when shooing the shot object, can cause comparatively strong perspective effect, make the picture of being shot have great visual impact force, additionally, the object side face of first lens is the plane, can be used to correct the spherical aberration of lens group, the phase difference, the distortion condition, promote the resolution ratio of lens group, make the imaging quality of lens group obtain promoting.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a lens group according to a first embodiment of the present application;

FIG. 2 is a longitudinal aberration diagram (mm) of the lens stack of FIG. 1;

FIG. 3 is a field curvature (mm) of the lens array of FIG. 1;

FIG. 4 is a distortion plot (%) of the lens array of FIG. 1;

FIG. 5 is a schematic view of a lens assembly according to a second embodiment of the present application;

FIG. 6 is a longitudinal aberration diagram (mm) of the lens group of FIG. 5;

FIG. 7 is a field curvature (mm) plot of the lens group of FIG. 5;

fig. 8 is a distortion map (%) of the lens group of fig. 5;

fig. 9 is a schematic structural view of a lens group according to a third embodiment of the present application;

FIG. 10 is a longitudinal aberration diagram (mm) of the lens group of FIG. 9;

FIG. 11 is a field curvature (mm) view of the lens group of FIG. 9;

fig. 12 is a distortion map (%) of the lens group in fig. 9;

fig. 13 is a schematic structural view of a lens group according to a fourth embodiment of the present application;

FIG. 14 is a longitudinal aberration diagram (mm) of the lens group of FIG. 13;

FIG. 15 is a field curvature (mm) view of the lens group of FIG. 13;

fig. 16 is a distortion map (%) of the lens group in fig. 13;

fig. 17 is a schematic structural view of a lens group according to a fifth embodiment of the present application;

FIG. 18 is a longitudinal aberration diagram (mm) of the lens group of FIG. 17;

FIG. 19 is a field curvature (mm) view of the lens group of FIG. 17;

fig. 20 is a distortion map (%) of the lens group in fig. 17;

fig. 21 is a schematic structural diagram of a camera module according to an embodiment of the present disclosure;

fig. 22 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 23 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The lens group 10 according to the present embodiment includes, from the object side to the image side, a first lens L1 having a negative refractive power, and the object side surface S1 of the first lens L1 is a flat surface, and includes a second lens L2 having a positive refractive power, a third lens L3 having a negative refractive power, a fourth lens L4 having a positive refractive power, a fifth lens L5 having a refractive power, and a sixth lens L6 having a refractive power.

The first lens L1 has an object-side surface S1 and an image-side surface S2. The second lens element L2 has an object-side surface S3 and an image-side surface S4, the object-side surface S3 of the second lens element L2 is convex, and the image-side surface S4 of the second lens element L2 is concave. The third lens element L3 has an object-side surface S5 and an image-side surface S6, and the object-side surface S5 of the third lens element L3 is convex. The fourth lens L4 has an object-side surface S7 and an image-side surface S8. The fifth lens element L5 has an object-side surface S9 and an image-side surface S10. The sixth lens element L6 has an object-side surface S11 and an image-side surface S12.

In some embodiments, the lens group 10 further includes an aperture stop STO and an infrared filter L7. The aperture stop STO may be disposed on a surface of any one of the lenses, or disposed in front of the first lens L1, or disposed between any two of the lenses, and a specific position of the aperture stop STO may be specifically set according to an actual situation, which is not limited herein. The infrared filter L7 is located between the sixth lens L6 and the photosensitive element. The infrared filter L7 includes an object-side surface S13 and an image-side surface S14.

When the lens assembly 10 is used for imaging, light rays emitted or reflected by the subject OBJ enter the lens assembly 10 from the object side, pass through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6, and finally converge on an imaging surface.

Further, the lens group 10 satisfies the following relational expression: fno <3.0, TTL/ih <2.2, and a field angle omega >150.0 degrees;

wherein, fno is the f-number of the lens group 10, TTL is the total length of the lens group 10, and ih is the image height of the lens group 10.

That is, fno can be any value less than 3, for example, 2.9, 2.8, 2.7, 2.6, 2.5, 2.4, 2.3, 2.2, 2, 1.8, 1.6, 1.4, 1.2, 1.1, 1, 0.8, 0.6, 0.5, 0.4, 0.3, 0.1, 0, -0.2, -0.4, etc.

TTL/ih can be any value less than 2.2, for example, 2.1, 2.15, 2, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1, 0.8, 0.6, 0.5, 0.4, 0.3, 0.1, 0, -0.2, -0.4, etc.

The angle of view ω may be any value greater than 150.0 °, for example, 151.0 °, 152.0 °, 153.0 °, 154.0 °, 155.0 °, 156.0 °, 157.0 °, 158.0 °, 159.0 °, 160.0 °, 161.0 °, 162.0 °, 163.0 °, or the like.

If the above relation is satisfied, the field angle can be larger than 150.0 °, so that the lens 10 group has an ultra-large field angle, and when shooting a shot object, a strong perspective effect can be caused, so that the shot picture has a large visual impact.

In addition, the object-side surface S1 of the first lens element L1 is a plane, and can be used for correcting spherical aberration, aberration and distortion of the lens assembly 10, so as to improve the resolution of the lens assembly 10, and improve the imaging quality of the lens assembly 10.

In some embodiments, the lens group 10 satisfies the following relationship:

D1＞0.3mm，1.50＜Nd1＜1.7；

where D1 is the thickness of the first lens L1, and Nd1 is the refractive index of the first lens L1.

That is, D1 may have any value greater than 0.3mm, and for example, the value may be 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or the like.

Nd1 is in the range of (1.5,1.7), and may take any value, for example, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, etc.

Under the condition of satisfying the above relation, the refractive index of the lens assembly 10 is suitable, so as to improve the imaging quality of the lens assembly 10, which is beneficial for users to use.

In some embodiments, the lens group 10 satisfies the following relationship:

0.3＜R2/R3/∣R8∣＜1；

wherein R2 is a lens curvature of the image-side surface S2 of the first lens element L1, R3 is a lens curvature of the object-side surface S3 of the second lens element L2, and R8 is a lens curvature of the image-side surface S8 of the fourth lens element L4.

That is, R2/R3/| R8 | may have any value in the interval (0.3, 1), for example, the value may be 0.35, 0.36, 0.4, 0.42, 0.46, 0.49, 0.51, 0.53, 0.56, 0.58, 0.61, 0.63, 0.65, 0.68, 0.72, 0.76, 0.79, 0.8, 0.85, 0.86, 0.87, 0.92, 0.96, etc.

Under the condition of satisfying the above relation, the lens curvature of the lens assembly 10 can be adjusted to ensure the processing feasibility of the lens assembly 10, which is beneficial to the production of the lens assembly 10, and the astigmatism of the spherical aberration can be effectively corrected to improve the imaging quality of the lens assembly 10.

In some embodiments, the lens group 10 satisfies the following relationship:

(D3/f3)*100＜0；

wherein D3 is a thickness of the third lens element L3, and f3 is an effective focal length of the third lens element L3.

That is, (D3/f 3) × 100 may be any value less than 0, for example, the value may be-1, -1.1, -1.2, -1.3, -1.4, -1.5, -1.6, -1.7, -1.9, -2, -2.2, -2.4, -2.8, -3.0, -3.2, -3.5, -3.9, -4.0, etc.

Under the condition of satisfying the above relation, the effective focal length of the lens assembly 10 can be adjusted to improve the imaging quality of the lens assembly 10, which is beneficial for the user to use.

In some embodiments, the lens group 10 satisfies the following relationship:

f4/f5<0；

where f4 is an effective focal length of the fourth lens L4, and f5 is an effective focal length of the fifth lens L5.

That is, f4/f5 can be any value less than 0, for example, the value can be-0.1, -0.3, -0.6, -0.8, -1, -1.1, -1.2, -1.3, -1.4, -1.5, -1.6, -1.7, -1.9, -2, -2.2, -2.4, -2.8, -3.0, -3.2, etc.

Under the condition of satisfying the above relation, the effective focal length of the lens group 10 is good, which is beneficial to improving the imaging quality of the lens group 10 and improving the user experience.

In some embodiments, the lens group 10 satisfies the following relationship:

0<T2/T1<10；

t1 is an air separation distance between the first lens L1 and the second lens L2, and T2 is an air separation distance between the second lens L2 and the third lens L3.

That is, T2/T1 may be any value in the interval (0, 10), for example, the value may be 1, 1.5, 1.8, 1.9, 2, 2.2, 2.5, 2.6, 2.9, 3, 3.5, 3.8, 4.2, 5, 5.2, 5.9, 6.5, 8, 9, etc.

Under the condition of satisfying the above relational expression, sufficient space exists in the first lens L1, the second lens L2 and the third lens L3 during assembly, so as to avoid collision between two adjacent lenses, ensure normal use of the lens group 10, facilitate thinning of the lens group 10, and avoid difficult assembly due to over-small numerical value, thereby increasing sensitivity of the optical system.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R3/R10<10；

where R3 is a lens curvature of the object-side surface S3 of the second lens element L2, and R10 is a lens curvature of the image-side surface S10 of the fifth lens element L5.

That is, R3/R10 may be any value in the interval (0, 10), for example, the value may be 1, 1.5, 1.8, 1.9, 2, 2.2, 2.5, 2.6, 2.9, 3, 3.5, 3.8, 4.2, 5, 5.2, 5.9, 6.5, 7, 7.5, 8, 8.5, 9, and the like.

Under the condition of satisfying the above relation, the lens curvature of the lens assembly 10 can be adjusted to ensure the processing feasibility of the lens assembly 10, which is beneficial for the production of the lens assembly 10, and the astigmatism of the spherical aberration can be effectively corrected, so as to improve the imaging quality of the lens assembly 10.

In some embodiments, the lens group 10 satisfies the following relationship:

0<∣R8∣/f<10；

wherein R8 is a curvature of the image-side surface S8 of the fourth lens element L4, and f is an effective focal length of the lens assembly 10.

That is, | R8 | may be any value in the interval (0, 10), for example, the value may be 1, 1.5, 1.8, 1.9, 2, 2.2, 2.5, 2.6, 2.9, 3, 3.5, 3.8, 4.2, 5, 5.2, 5.9, 6.5, 7, 7.5, 8, 8.5, 9, etc.

In some embodiments, the lens group 10 satisfies the following relationship:

-20<R10/R4<0；

where R10 is a lens curvature of the image-side surface S10 of the fifth lens element L5, and R4 is a lens curvature of the image-side surface S4 of the second lens element L2.

That is, R10/R4 may have any value in the (-20,0) interval, for example, it may have a value of-19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, etc.

In some embodiments, the lens group 10 satisfies the following relationship:

Vd1>50；

where Vd1 is the abbe number of the first lens L1.

That is, vd1 may have any value greater than 50, for example, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, or the like.

Under the condition of satisfying the above relation, the dispersion condition of the lens group 10 can be reduced, so that the imaging quality of the lens group 10 is high, and the user experience is improved.

Herein, the Abbe number is also referred to as Abbe number.

In some embodiments, the lens group 10 satisfies the following relationship:

0<(T4/f)*100<20；

where T4 is an air separation distance between the fourth lens L4 and the fifth lens L5, and f is an effective focal length of the lens group 10.

That is, (T4/f) × 100 may be any value in the interval (0, 20), for example, the value may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, etc.

Under the condition of satisfying the above relation, the effective focal length of the lens group 10 is made better, thereby improving the imaging quality of the lens group 10.

In some embodiments, the lens group 10 satisfies the following relationship:

-5<(R2/T1)/100<5；

wherein R2 is a curvature of the image-side surface S2 of the first lens element L1, and T1 is an air separation distance between the first lens element L1 and the second lens element L2.

That is, (R2/T1)/100 can be any value in the (-5,5) interval, for example, the value can be-4, -3.5, -3, -2.5, -2, -1, -0.5, 0.2, 0.9, 1, 2, 3, 3.5, 3.8, 4.2, 4.5, 4.9, etc.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R2/R5<10；

wherein R2 is a lens curvature of the image-side surface S2 of the first lens element L1, and R5 is a lens curvature of the object-side surface S5 of the third lens element L3.

That is, R2/R5 may be any value in the interval (0,10), for example, the value may be 1, 1.5, 1.6, 1.8, 1.9, 2, 2.1, 2.5, 2.6, 2.8, 3.2, 3.6, 3.9, 4.2, 4.6, 4.9, 5.3, 5.6, 5.9, 6.2, 6.5, 6.9, 7, 8, 9, etc.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R3/R7<10；

where R3 is a lens curvature of the object-side surface S3 of the second lens element L2, and R7 is a lens curvature of the object-side surface S7 of the fourth lens element L4.

That is, R3/R7 may be any value in the interval (0, 10), for example, the value may be 1, 1.5, 1.6, 1.8, 1.9, 2, 2.1, 2.5, 2.6, 2.8, 3.2, 3.6, 3.9, 4.2, 4.6, 4.9, 5.3, 5.6, 5.9, 6.2, 6.5, 6.9, 7, 7.5, 8, 8.5, 9, 9.8, and the like.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R5/T3<100；

wherein R5 is a curvature of the object-side surface S5 of the third lens element L3, and T3 is an air separation distance between the third lens element L3 and the fourth lens element L4.

That is, R5/T3 may be any value in the interval (0, 100), for example, the value may be 10, 20, 30, 50, 55, 60, 65, 70, 72, 76, 79, 80, 82, 83, 84, 86, 89, 92, 93, 95, 98, 99, or the like.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R7/T2<500；

wherein R7 is a curvature of the object-side surface S7 of the fourth lens element L4, and T2 is an air separation distance between the second lens element L2 and the third lens element L3.

That is, R7/T2 may be any value in the interval (0, 500), for example, the value may be 10, 20, 30, 50, 100, 110, 150, 160, 200, 220, 225, 230, 260, 300, 350, 360, 380, 420, 460, 480, 499, or the like.

In some embodiments, the lens group 10 satisfies the following relationship:

0<R10/f<100；

wherein R10 is a curvature of the image-side surface S10 of the fifth lens element L5, and f is an effective focal length of the lens assembly 10.

That is, 10/f may be any value in the interval (0, 100), for example, the value may be 10, 20, 30, 50, 55, 60, 65, 70, 72, 76, 79, 80, 81, 81.5, 82, 83, 84, 86, 87, 89, 92, 93, 95, 98, 99, or the like.

Under the condition of satisfying the above relation, the effective focal length of the lens assembly 10 is adjusted to adjust the spherical aberration of the lens assembly 10, so as to achieve the balance of the spherical aberration of the lens assembly 10, and further improve the imaging quality of the lens assembly 10.

In some embodiments, the lens group 10 satisfies the following relationship:

-50<f3/f<0；

wherein f3 is the effective focal length of the third lens element L3, and f is the effective focal length of the lens assembly 10.

That is, f3/f can be any value in the (-50, 0) interval, for example, the value can be-49, -48, -47, -46, -45, -43, -41, -38, -36, -32, -30, -29, -25, -23, -21, -19, -18, -16, -14, -9, -8, -6, -3, -1, etc.

Under the condition of satisfying the above relation, the effective focal length of the lens assembly 10 is adjusted to adjust the spherical aberration of the lens assembly 10, so as to realize the balance of the spherical aberration of the lens assembly 10, and further improve the imaging quality of the lens assembly 10.

In some embodiments, the lens group 10 satisfies the following relationship:

0<∣f4∣/f<50；

wherein f4 is the effective focal length of the fourth lens element L4, and f is the effective focal length of the lens assembly 10.

That is, | f4 | f may be any value in the (0, 50) interval, for example, the value may be 1, 5, 6, 9, 11, 15, 16, 18, 20, 22, 26, 28, 30, 32, 36, 38, 42, 45, 46, 47, 48, 49, etc.

In some embodiments, the lens group 10 satisfies the following relationship:

0<(D2/f2)*100<100；

wherein D2 is the thickness of the second lens element L2, and f2 is the effective focal length of the second lens element L2.

That is, (D2/f 2) × 100 may be any value in the interval (0, 100), for example, it may be 1, 2, 3, 10, 20, 25, 30, 36, 40, 45, 48, 52, 56, 59, 62, 68, 75, 76, 78, 84, 91, 92, 93, 98, 99, etc.

In some embodiments, the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6 are all made of plastic.

Since the first lens element L1 to the sixth lens element L6 are all plastic lenses, the lens assembly 10 can be ultra-thin while effectively eliminating aberration and satisfying high pixel requirement, and the cost is low.

In the present embodiment, the infrared filter L7 is made of glass. Of course, in other embodiments, the infrared filter L7 may be made of other materials. The specific setting can be according to the actual conditions. And are not limited herein.

In some embodiments, at least one surface of at least one lens of the lens group 10 is aspheric. For example, in the embodiment of the present application, the object-side surface S2 and the image-side surface S3 and the image-side surface S4 of the first lens L1 are aspheric, the object-side surface S5 and the image-side surface S6 of the third lens L3 are aspheric, the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are aspheric, the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are aspheric, the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are aspheric, and the object-side surface S13 and the image-side surface S14 of the infrared filter L7 are spherical.

That is to say, the object-side surface S1 of the first lens element L1 is a plane, the image-side surface S2, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6 of the first lens element L1 are aspheric lenses, and the ir filter L7 is a spherical surface. The aspherical surface has a surface shape determined by the following formula:

where Z is the longitudinal distance between any point on the aspheric surface and the vertex of the surface, r is the distance from any point on the aspheric surface to the optical axis, c is the vertex curvature (reciprocal of the lens curvature), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.

Thus, the lens assembly 10 can effectively reduce the total length of the lens assembly 10 by adjusting the curvature and aspheric coefficients of the lens surfaces, and can effectively correct the aberration of the lens assembly 10, thereby improving the imaging quality.

The first embodiment is as follows:

referring to fig. 1, the first lens L1 has a negative refractive index, the second lens L2 has a positive refractive index, the third lens L3 has a negative refractive index, the fourth lens L4 has a positive refractive index, the fifth lens L5 has a refractive index, and the sixth lens L6 has a refractive index, wherein the refractive index of the fifth lens L5 may be a positive refractive index or a negative refractive index, and the refractive index of the sixth lens L6 may be a positive refractive index or a negative refractive index.

Referring to fig. 1 to 4, the lens assembly 10 satisfies the following table conditions:

TABLE 1

Conditional formula	Example one
		R2/R3/\|R8\|	0.53
(D3/f3)×100	-4.31
		f4/f5	-0.32
T2/T1	0.24
		R3/R10	0.06
\|R8\|/f	0.40
		R10/R4	-16.82
vd1	56.44
		(T4/f)×100	3.57
(R2/T1)/100	0.04
		R2/R5	0.43
R3/R7	0.06
		R5/T3	24.07
R7/T2	286.89
		R7/(T3-T2)	564.09
R10/f	13.07
		f3/f	-2.85
\|f4\|/f	0.72
		(D2/f2)×100	33.07

TABLE 2

In table 2, fno is the f-number of the lens group 10, TTL is the total length of the lens group 10, ih is the image plane height of the lens group 10, and ω is the field angle of the lens group 10.

TABLE 3

Example two

Referring to fig. 5, the first lens L1 has a negative refractive index, the second lens L2 has a positive refractive index, the third lens L3 has a negative refractive index, the fourth lens L4 has a positive refractive index, the fifth lens L5 has a refractive index, and the sixth lens L6 has a refractive index, wherein the refractive index of the fifth lens L5 may be a positive refractive index or a negative refractive index, and the refractive index of the sixth lens L6 may be a positive refractive index or a negative refractive index, which may be considered according to practical situations and is not limited herein.

Referring to fig. 5 to 8, the lens assembly 10 satisfies the following table conditions:

TABLE 4

Conditional formula	Example two
		R2/R3/\|R8\|	0.53
(D3/f3)×100	-3.59
		f4/f5	-0.49
T2/T1	0.09
		R3/R10	0.27
\|R8\|/f	0.44
		R10/R4	-2.32
vd1	56.44
		(T4/f)×100	5.98
(R2/T1)/100	0.02
		R2/R5	0.66
R3/R7	0.38
		R5/T3	16.25
R7/T2	73.85
		R7/(T3-T2)	63.63
R10/f	2.93
		f3/f	-3.37
\|f4\|/f	0.72
		(D2/f2)×100	29.10

TABLE 5

In table 5, fno is an f-number of the lens group 10, TTL is a total length of the lens group 10, ih is an image plane height of the lens group 10, and ω is a field angle of the lens group 10.

TABLE 6

EXAMPLE III

Referring to fig. 9, the first lens L1 has a negative refractive index, the second lens L2 has a positive refractive index, the third lens L3 has a negative refractive index, the fourth lens L4 has a positive refractive index, the fifth lens L5 has a refractive index, and the sixth lens L6 has a refractive index, wherein the refractive index of the fifth lens L5 may be a positive refractive index or a negative refractive index, and the refractive index of the sixth lens L6 may be a positive refractive index or a negative refractive index.

Referring to fig. 9 to 12, the lens assembly 10 satisfies the following table conditions:

TABLE 7

Conditional formula	EXAMPLE III
		R2/R3/\|R8\|	0.45
(D3/f3)×100	-3.19
		f4/f5	-0.41
T2/T1	0.14
		R3/R10	0.11
\|R8\|/f	0.43
		R10/R4	-6.95
vd1	56.44
		(T4/f)×100	8.23
(R2/T1)/100	0.03
		R2/R5	0.52
R3/R7	0.25
		R5/T3	26.35
R7/T2	116.15
		R7/(T3-T2)	162.82
R10/f	7.17
		f3/f	-3.23
\|f4\|/f	0.73
		(D2/f2)×100	27.99

TABLE 8

In table 8, fno is the f-number of the lens group 10, TTL is the total length of the lens group 10, ih is the image plane height of the lens group 10, and ω is the field angle of the lens group 10.

TABLE 9

Example four

Referring to fig. 13, the first lens L1 has a negative refractive index, the second lens L2 has a positive refractive index, the third lens L3 has a negative refractive index, the fourth lens L4 has a positive refractive index, the fifth lens L5 has a refractive index, and the sixth lens L6 has a refractive index, wherein the refractive index of the fifth lens L5 may be a positive refractive index or a negative refractive index, and the refractive index of the sixth lens L6 may be a positive refractive index or a negative refractive index.

Referring to fig. 13 to 16, the lens assembly 10 satisfies the following table conditions:

watch 10

Conditional formula	Example four
		R2/R3/\|R8\|	0.52
(D3/f3)×100	-2.26
		f4/f5	-0.38
T2/T1	0.14
		R3/R10	0.06
\|R8\|/f	0.44
		R10/R4	-10.55
vd1	56.44
		(T4/f)×100	6.72
(R2/T1)/100	0.03
		R2/R5	0.54
R3/R7	0.18
		R5/T3	25.15
R7/T2	149.11
		R7/(T3-T2)	226.82
R10/f	12.10
		f3/f	-5.18
\|f4\|/f	0.75
		(D2/f2)×100	31.51

TABLE 11

In table 11, fno is an f-number of the lens group 10, TTL is a total length of the lens group 10, ih is an image plane height of the lens group 10, and ω is a field angle of the lens group 10.

TABLE 12

EXAMPLE five

Referring to fig. 17, the first lens L1 has a negative refractive index, the second lens L2 has a positive refractive index, the third lens L3 has a negative refractive index, the fourth lens L4 has a positive refractive index, the fifth lens L5 has a refractive index, and the sixth lens L6 has a refractive index, wherein the refractive index of the fifth lens L5 may be a positive refractive index or a negative refractive index, and the refractive index of the sixth lens L6 may be a positive refractive index or a negative refractive index, which may be considered according to practical situations and is not limited herein.

Referring to fig. 17 to 20, the lens assembly 10 satisfies the following table conditions:

watch 13

Conditional formula	EXAMPLE five
		R2/R3/\|R8\|	0.50
(D3/f3)×100	-2.59
		f4/f5	-0.40
T2/T1	0.13
		R3/R10	0.09
\|R8\|/f	0.44
		R10/R4	-7.19
vd1	56.44
		(T4/f)×100	6.51
(R2/T1)/100	0.03
		R2/R5	0.55
R3/R7	0.23
		R5/T3	25.86
R7/T2	121.54
		R7/(T3-T2)	218.32
R10/f	8.19
		f3/f	-4.54
\|f4\|/f	0.74
		(D2/f2)×100	31.51

TABLE 14

In table 14, fno is the f-number of the lens group 10, TTL is the total length of the lens group 10, ih is the image plane height of the lens group 10, and ω is the field angle of the lens group 10.

Watch 15

Referring to fig. 21, the camera module 100 according to the present embodiment includes the lens assembly 10 and the photosensitive element 20 according to any of the above embodiments, and the photosensitive element 20 is disposed on the image side of the lens assembly 10.

The photosensitive element 20 may be a Complementary Metal Oxide SemiconductoR (CMOS) photosensitive element or a ChaRge-coupled Device (CCD) photosensitive element.

The camera module 100 of this application embodiment is through reasonable lens configuration for the angle of field can be greater than 150.0, so make the lens group 100 possess super large angle of field, when shooing the object of being shot, can cause comparatively strong perspective effect, make the picture of being shot have great visual impact force, in addition, the object side face S1 of first lens L1 is the plane, can be used to correct the spherical aberration of lens group 10, the phase difference, the distortion condition, promote the resolution ratio of lens group 10, make the imaging quality of lens group 10 obtain promoting.

The electronic device 1000 according to the embodiment of the present application includes the housing 200 and the camera module 100, and the camera module 100 is mounted on the housing 200.

The electronic device 1000 of the embodiment of the present application is configured by reasonable lens, so that the field angle can be greater than 150.0 °, so that the lens group 10 has an ultra-large field angle, when shooting a subject, a strong perspective effect can be caused, so that the shot picture has a large visual impact force, in addition, the object side surface S1 of the first lens L1 is a plane, which can be used for correcting the spherical aberration, phase difference and distortion condition of the lens group 10, and the resolution of the lens group 10 is improved, so that the imaging quality of the lens group 10 is improved.

The electronic device 1000 according to the embodiment of the present invention includes, but is not limited to, information terminal devices such as a smart phone (as shown in fig. 22), a mobile phone, a PeRsonal Digital Assistant (PDA), a game machine, a PeRsonal ComputeR (PC), a camera, a smart watch, and a tablet PC (fig. 23), and home appliances having a photographing function.

In the description of the present specification, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present application, which is defined by the claims and their equivalents.

Claims

1. A lens system having only six refractive lenses, comprising, from an object side to an image side:

a first lens having a negative refractive index, an object side surface of the first lens being a plane;

a second lens having a positive refractive index;

a third lens having a negative refractive index;

a fourth lens having a positive refractive index;

a fifth lens having a negative refractive index;

a sixth lens having a negative refractive index;

the lens group satisfies the following relation:

fno <3.0, TTL/ih <2.2, field angle omega >150.0, D1 > 0.3mm,1.50 < Nd1 < 1.7;

wherein, fno is the f-number of the lens group, TTL is the total length of the lens group, ih is the image plane height of the lens group, D1 is the thickness of the first lens, and Nd1 is the refractive index of the first lens.

2. The lens group of claim 1, wherein the lens group satisfies at least one of the following relationships:

0.3＜R2/R3/∣R8∣＜1；

0<R3/R10<10；

-20<R10/R4<0；

0<R2/R5<10；

0<R3/R7<10；

wherein R2 is a lens curvature of an image-side surface of the first lens element, R3 is a lens curvature of an object-side surface of the second lens element, R4 is a lens curvature of an image-side surface of the second lens element, R5 is a lens curvature of an object-side surface of the third lens element, R7 is a lens curvature of an object-side surface of the fourth lens element, R8 is a lens curvature of an image-side surface of the fourth lens element, and R10 is a lens curvature of an image-side surface of the fifth lens element.

3. The lens group according to claim 1, wherein said lens group satisfies the following relation:

(D3/f3)*100＜0；

wherein D3 is a thickness of the third lens element, and f3 is an effective focal length of the third lens element.

4. The lens group according to claim 1, characterized in that the lens group satisfies at least one of the following relations:

f4/f5<0；

-50<f3/f<0；

0<∣f4∣/f<50；

wherein f3 is an effective focal length of the third lens element, f4 is an effective focal length of the fourth lens element, f5 is an effective focal length of the fifth lens element, and f is an effective focal length of the lens assembly.

5. The lens group of claim 1, wherein said lens group satisfies the following relationship:

0<T2/T1<10；

wherein T1 is an air separation distance between the first lens and the second lens, and T2 is an air separation distance between the second lens and the third lens.

6. The lens group according to claim 1, wherein said lens group satisfies the following relation:

0<∣R8∣/f<10；

wherein R8 is a curvature of an image side surface of the fourth lens element, and f is an effective focal length of the lens assembly.

7. The lens group according to claim 1, wherein said lens group satisfies the following relation:

Vd1>50；

and Vd1 is the dispersion coefficient of the first lens.

8. The lens group according to claim 1, wherein said lens group satisfies the following relation:

0<(T4/f)*100<20；

wherein T4 is an air separation distance between the fourth lens and the fifth lens, and f is an effective focal length of the lens group.

9. The lens group according to claim 1, characterized in that the lens group satisfies at least one of the following relations:

-5<(R2/T1)/100<5；

0<R5/T3<100；

0<R7/T2<500；

wherein R2 is a lens curvature of an image-side surface of the first lens element, R5 is a lens curvature of an object-side surface of the third lens element, R7 is a lens curvature of an object-side surface of the fourth lens element, T1 is an air separation distance between the first lens element and the second lens element, T2 is an air separation distance between the second lens element and the third lens element, and T3 is an air separation distance between the third lens element and the fourth lens element.

10. The lens group of claim 1, wherein said lens group satisfies the following relationship:

0<R10/f<100；

wherein R10 is a curvature of an image side surface of the fifth lens element, and f is an effective focal length of the lens assembly.

11. The lens group according to claim 1, wherein said lens group satisfies the following relation:

0<(D2/f2)*100<100；

wherein D2 is the thickness of the second lens, and f2 is the effective focal length of the second lens.

12. A camera module, comprising:

the lens group of any one of claims 1 to 11; and

a photosensitive element disposed on an image side of the lens group.

13. An electronic device, comprising:

a housing; and

the camera module of claim 12, mounted to the housing.