CN111399176A

CN111399176A - Optical imaging lens and imaging device

Info

Publication number: CN111399176A
Application number: CN202010297683.7A
Authority: CN
Inventors: 李龙佳; 于盼
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-10

Abstract

The embodiment of the application discloses optical imaging lens and imaging equipment, is applied to imaging equipment, imaging equipment includes a plurality of lenses, along optical axis from the thing side to the image side include in proper order: a first lens, a second lens and at least one third lens; the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the second lens and the at least one third lens have focal power. Therefore, when the optical imaging lens is used for imaging under a display screen, the opening size is small, the attractive effect of full-screen display is enhanced, the size of the optical imaging lens is small, and electronic products are light and thin.

Description

Optical imaging lens and imaging device

Technical Field

The application relates to the technical field of optical imaging, in particular to an optical imaging lens and imaging equipment.

Background

The specifications of consumer electronic products are changing day by day, and the steps for pursuing light, thin, short and small products are not slowed down, so that the specifications of key components of electronic products such as optical lenses and the like must be continuously improved to meet the requirements of consumers. The most important characteristics of the optical lens are not only the imaging quality and volume. The wide-angle lens that uses on portable electronic product such as present cell-phone, flat board is great because of lens cone front end clear aperture for when imaging under the display screen, for avoiding sheltering from imaging light, the trompil size of screen also can be great, thereby influences the pleasing to the eye of product.

However, the optical lens design does not simply scale down a lens with good imaging quality to produce an optical lens with both imaging quality and miniaturization, and the design process not only involves material characteristics, but also needs to consider practical problems in production aspects such as production and assembly yield. Therefore, the technical difficulty of the miniaturized lens is obviously higher than that of the traditional lens, so how to manufacture the optical lens meeting the requirements of consumer electronic products and continuously improve the imaging quality of the optical lens is a continuously refined target in various fields for a long time.

Disclosure of Invention

The embodiment of the application provides an optical imaging lens and imaging equipment, so that the small opening size of the imaging lens is achieved by controlling the arrangement of a plurality of lenses and controlling the relevant parameters of a relational expression, the excellent imaging quality is presented for the scene details in a wider field angle range, and the light and thin requirements of electronic products are met.

In a first aspect, an embodiment of the present application provides an optical imaging lens, which is applied to an imaging device, where the imaging device includes a plurality of lenses, and includes, in order from an object side surface to an imaging surface along an optical axis:

a first lens, a second lens and at least one third lens; wherein the content of the first and second substances,

the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the second lens and the at least one third lens have focal power.

According to the optical imaging lens provided by the invention, the first lens, the second lens and the at least one third lens of the optical imaging lens satisfy the following conditional expressions:

IMHG/EPD>2；

the IMGH represents half of the diagonal length of the effective pixel area on the imaging surface, and the EPD represents the entrance pupil diameter of the optical imaging lens.

TT L/IMHG <2 and FOV >90 °;

the TT L represents an on-axis distance from the object-side surface of the first lens to the imaging surface, and the FOV represents the maximum field angle of the optical imaging lens.

According to the optical imaging lens provided by the invention, the optical imaging lens meets the following conditions:

F/EPD<3；

wherein F represents an effective focal length of the optical imaging lens.

0.5<F1/F<3.5；

wherein the F1 represents an effective focal length of the first lens.

0.2<(CT1+CT2+CT3)/TTL<0.8；

wherein the CT1, the CT2, and the CT3 respectively represent center thicknesses of the first lens, the second lens, and the third lens on an optical axis.

|R4/R3|<2；

wherein the R3 and the R4 represent radii of curvature of the second lens object side and image plane, respectively.

0<(R5-R6)/(R5+R6)<1.5；

wherein the R5 and the R6 represent radii of curvature of the third lens object side and image plane, respectively.

CT1/(T12+T23)<2；

wherein the T12 represents an air space on the optical axis of the first lens and the second lens, and the T23 represents an air space on the optical axis of the second lens and the third lens.

0<R1/F1<2；

wherein R1 represents a radius of curvature of the first lens object side surface, and F1 represents an optical power of the first lens.

the object side surface and the imaging surface of any one of the first lens, the second lens and the at least one third lens are aspheric surfaces;

and determining the surface types of the first lens, the second lens and the at least one third lens according to a preset aspheric surface formula.

According to the optical imaging lens provided by the invention, the optical imaging lens meets the following conditions: determining the surface types of the first lens, the second lens and the at least one third lens according to a preset aspheric surface formula, wherein the preset aspheric surface formula is as follows:

wherein z is a distance vector height from an aspheric vertex when the aspheric surfaces of the first lens, the second lens and the at least one third lens are at a position with a height r along the optical axis direction; c is the paraxial curvature of the aspheric surface, wherein c is 1/R, wherein R is the curvature radius; k is a conic coefficient; A. b, C, D, E, F, G, H and J denote correction coefficients of

order

4, 6, 8, 10, 12, 14, 16, 18 and 20 of r, respectively. Image plane

In a second aspect, an embodiment of the present application provides an imaging apparatus including the optical imaging lens described in any one of the above.

It can be seen that, in the embodiment of the present application, the application is applied to an imaging apparatus, the imaging apparatus includes a plurality of lenses, and an imaging plane sequentially includes, from an object side surface to the imaging plane along an optical axis: a first lens, a second lens and at least one third lens; the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the second lens and the at least one third lens have focal power. Therefore, when the optical imaging lens is used for imaging under a display screen, the opening size is small, the attractive effect of full-screen display is enhanced, the size of the optical imaging lens is small, and electronic products are light and thin.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical imaging lens including a three-piece lens according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an optical imaging lens including a three-piece lens according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an optical imaging lens including four lens elements according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an optical imaging lens including four lens elements according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an optical imaging lens including four lens elements according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of an optical imaging lens including four lens elements according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of an optical imaging lens including five-lens elements according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an optical imaging lens including five lens elements according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an optical imaging lens including five-lens elements according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of an optical imaging lens including five-piece lenses according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The imaging device according to the embodiment of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), Mobile Stations (MS), terminal devices (terminal device), and the like.

The following describes embodiments of the present application in detail.

Fig. 1 is a schematic structural diagram of an optical imaging lens including three lens elements according to a first embodiment of the present application, where the optical imaging lens is applied to an imaging device, the imaging device includes a plurality of lens elements, and an imaging plane sequentially includes, from an object side to an image side along an optical axis: a first lens 101, a second lens 102, and at least one third lens 103; the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the second lens and the at least one third lens have focal power.

In a specific implementation, the optical imaging lens 100 may further include a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106, which are sequentially disposed from an object side to an image side along an optical axis.

The first lens is mainly used for collecting light rays, the second lens is mainly used for correcting spherical aberration, coma aberration and astigmatism, and the third lens is mainly used for correcting aberrations such as astigmatism and field curvature and the like and is used for controlling the light ray emergence angle; the diaphragm is used for limiting the aperture of the light passing, the position of the entrance pupil can be moved forward by arranging the diaphragm in front of the first lens, the influence of the diaphragm on distortion is zero, and the aperture of the lens is effectively reduced.

In the concrete realization, the lens can all use glass material, can improve the heat stability of camera lens, makes optical imaging camera lens can be applied to the complicated field of more environment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 1, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 2. In the table, OBJ represents the object distance, and STO represents the distance of the stop from the first surface of the single lens. Referring to table 1 and fig. 1, S1 and S2 … S9 in table 1 correspond to 9 faces 2 and 3 … 10 in fig. 1, respectively, S1 … S9 indicates a face of a lens, and the thickness of S1 … S9 indicates a distance from the face to the next face.

TABLE 1

TABLE 2

As can be seen, the embodiments of the present application are applied to an imaging apparatus including a plurality of lenses, an imaging plane including, in order from an object side to an image side along an optical axis: a first lens, a second lens and at least one third lens; the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the second lens and the at least one third lens have focal power. Therefore, when the optical imaging lens is used for imaging under a display screen, the opening size is small, the attractive effect of full-screen display is enhanced, the size of the optical imaging lens is small, and electronic products are light and thin.

In some embodiments, the first lens, the second lens, and the at least one third lens of the optical imaging lens satisfy the following conditional expressions: IMHG/EPD > 2; (1)

wherein, the IMGH represents half of the diagonal length of the effective pixel area on the imaging surface, and the EPD represents the entrance pupil diameter of the optical imaging lens; the optimal item of the conditional expression is IMHG/EPD >2.5, the conditional expression (1) is satisfied, and the imaging lens has a small clear aperture and is used for imaging under a display screen, so that the aesthetic effect of full-screen display can be enhanced.

In some embodiments, the first lens, the second lens, and the at least one third lens of the optical imaging lens satisfy the following conditions of TT L/IMHG <2 and FOV >90 ° (2)

TT L represents the on-axis distance from the object side surface of the first lens to the imaging surface, and the FOV represents the maximum field angle of the optical imaging lens, wherein the optimal terms of the conditional expressions are TT L/IMHG <1.5 and FOV >100 degrees, and the conditional expression (2) is satisfied, so that the miniaturization requirement of the lens can be satisfied, meanwhile, the image surface is large enough, and more detailed information of the shot object in a wider field angle range is reproduced.

In some embodiments, the optical imaging lens satisfies the following conditional expression: F/EPD < 3; (3)

wherein F represents an effective focal length of the optical imaging lens. Wherein, the optimal term of the conditional expression is: F/EPD <2.5, the condition (3) is met, and the low illumination of the edge field relative to the central field can be avoided by controlling the relative aperture of the optical system, so that the risk of vignetting of the image surface is avoided.

In some embodiments, the optical imaging lens satisfies the following conditional expression: 0.5< F1/F < 3.5; (4)

wherein the F1 represents an effective focal length of the first lens. Wherein, the optimal term of the conditional expression is: 1.0< F1/F <3.0, satisfying this conditional expression (4), can rationally configure the effective focal length of first lens, both can realize the effective deflection of great visual field formation of image light, can also avoid the focal power to concentrate on first lens, reduce the sensitivity of this lens, for actual shaping and assembly process provide more loose tolerance condition, when realizing the miniaturization, guarantee that the system has longer focal length.

In some embodiments, the optical imaging lens satisfies the following conditional expression 0.2< (CT1+ CT2+ CT3)/TT L < 0.8; (5)

The optimal terms of the conditional expressions are that 0.3< (CT1+ CT2+ CT3)/TT L is less than 0.7, the conditional expression (5) is met, the requirements of the lens on lightness and thinness can be met, and the forming manufacturability of the first three lenses can be guaranteed.

In some embodiments, the optical imaging lens satisfies the following conditional expression: i R4/R3I < 2; (6)

where R3 and R4 denote radii of curvature of the object-side and image-forming surfaces of the second lens, respectively. Wherein, the optimal term of the conditional expression is: if the conditional expression (6) is satisfied, the curvature radiuses of the object side surface and the imaging surface of the second lens can be reasonably configured, so that the spherical aberration and astigmatism generated by the second lens can be reduced, the incident angle and the emergent angle of light rays on the second lens can be reduced, and the sensitivity of the lens can be reduced.

In some embodiments, the optical imaging lens satisfies the following conditional expression: 0< (R5-R6)/(R5+ R6) < 1.5; (7)

where R5 and R6 denote radii of curvature of the object-side and image-forming surfaces of the third lens, respectively. Wherein, the optimal term of the conditional expression is: 0< (R5-R6)/(R5+ R6) <1.0, satisfies this conditional expression (7), can slow down the deflection of light in the lens effectively through controlling the radius of curvature of the object side and the imaging plane of the third lens, and reduce astigmatism and coma generated by the first two lenses, promote the imaging quality of the optical system.

In some embodiments, the optical imaging lens satisfies the following conditional expression: CT1/(T12+ T23) < 2; (8)

where T12 is an air space on the optical axis between the first lens and the second lens, and T23 is an air space on the optical axis between the second lens and the third lens. Wherein, the optimal term of the conditional expression is: CT1/(T12+ T23) <1.5, satisfy this conditional expression (8), can slow down the skew of light from first lens to third lens to reduce the sensitivity of preceding three lenses to shaping and assembly tolerance, promote the yield of camera lens volume production, rationally dispose the interval between the lens simultaneously, can reduce the stress of lens when assembling, avoid the deformation volume too big.

In some embodiments, the optical imaging lens satisfies the following conditional expression: 0< R1/F1< 1.5; (9)

wherein R1 represents a radius of curvature of the first lens object side surface, and F1 represents an optical power of the first lens. Wherein, the optimal term of the conditional expression is: 0< R1/F1<1, satisfies the conditional expression (9), and can reduce spherical aberration and chromatic aberration generated by the first lens and avoid strong total reflection ghost of light in the first lens due to overlarge deflection angle by controlling the ratio range of R1/F1.

In some embodiments, the object side surface and the imaging surface of the first lens, the second lens, and the at least one third lens are aspheric.

In some embodiments, the surface shapes of the first lens, the second lens and the at least one third lens are determined according to a preset aspheric formula:

orders

4, 6, 8, 10, 12, 14, 16, 18 and 20, respectively.

In the concrete implementation, the lens surface shape adopts a free-form surface, and the imaging quality with higher definition and smaller distortion can be realized, so that a better scene reduction effect is achieved.

In some embodiments, the third lens element has a convex object-side surface and a concave image-side surface.

In some embodiments, the third lens has at least one inflection point on an object side and an image side. By setting the inflection point, the angle of the light rays of the off-axis field of view incident on the imaging surface can be effectively suppressed, and the aberration of the off-axis field of view can be further corrected. In some embodiments, the object-side surface of the third lens element is concave and the image plane is convex. The emergent angle of the light can be reduced, the total optical length can be reduced, and the miniaturization of the lens can be realized.

In some embodiments, the present invention provides an imaging apparatus, including the optical imaging lens of any one of the above embodiments, and an imaging element for converting an optical image formed by the optical imaging lens into an electrical signal.

In addition, through the numerical control of the following parameters, the optical imaging lens which has good optical performance, effectively shortens the whole length, improves the telescopic characteristic and is technically feasible can be assisted to design by a designer, in order to achieve that the imaging lens has a smaller clear aperture, the ratio of the half of the diagonal length of the effective pixel area on the imaging surface to the entrance pupil diameter of the optical imaging lens is set to be more than 2.5 for imaging under a display screen, the aesthetic effect of whole-screen display can be enhanced, and a proper lens volume can be maintained, when the optical imaging lens meets any one of the following conditional expressions, the length of the parameter of the numerator can be relatively shortened, the effect of reducing the lens volume is further achieved, the requirement of miniaturization of the lens can be met, meanwhile, the image surface is large enough, and more detailed information of an object to be shot in a wider field angle range is reproduced, wherein TT L/IMGH is less than 1.5, and FOV is more than 100 degrees.

In view of the unpredictability of the optical system design, the configuration of the present invention, which satisfies the above-mentioned conditions, can preferably shorten the lens length, increase the aperture, reduce the field angle, improve the image quality, or improve the assembly yield, thereby improving the disadvantages of the prior art.

In addition to the above relations, the following embodiments may also be used to design additional features such as concave-convex curved surface arrangement of other more lenses for a single lens or a plurality of lenses, so as to enhance the control of system performance and/or resolution and the improvement of yield in manufacturing. It should be noted that these details need not be selectively combined and applied in other embodiments of the present invention without conflict, and are not limited thereto.

To illustrate that the present invention can provide good optical performance and shorten the lens length, a plurality of embodiments and detailed optical data thereof are provided below. Please refer to fig. 2 to fig. 10 together.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an optical imaging lens comprising three lens elements according to a second embodiment of the present invention. In this embodiment, similar components are denoted by similar reference numerals as in the first embodiment, and as shown in fig. 2, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configuration of the object-

side surfaces

1, 2, 4, 6, 8 facing the object side a1 and the image-

side surfaces

5, 7, 9 facing the image side a2 in the second embodiment is substantially similar to that in the first embodiment, and the concave-convex configuration of the surface of the image plane 3 of the first lens element 101, the respective radii of curvature, the lens thickness, the aspheric coefficients, and the back focal length are different from those in the first embodiment. In more detail, the imaging surface 3 of the first lens 101 has a convex surface portion located in the vicinity of the optical axis.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 3, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 4. In the table, OBJ represents the object distance, and STO represents the distance of the stop from the first surface of the single lens. Referring to table 3 and fig. 2, S1 and S2 … S9 in table 3 correspond to 9 faces 2 and 3 … 10 in fig. 2, respectively, S1 … S9 indicates a face of a lens, and the thickness of S1 … S9 indicates a distance from the face to the next face.

TABLE 3

Flour mark	Surface type	Radius of curvature (mm)	Thickness (mm)	Material	Coefficient of cone
						OBJ	Spherical surface	All-round	350.3500
STO	Spherical surface	All-round	-0.0148
						S1	Aspherical surface	1.7458	0.2743	1.53，60.0	-2.7949
S2	Aspherical surface	-5.0000	0.1683		50.0000
						S3	Aspherical surface	-1.7420	0.7622	1.53，60.0	5.7313
S4	Aspherical surface	-1.0650	0.2855		-12.2547
						S5	Aspherical surface	1.0636	0.4855	1.65，21.8	-9.4975
S6	Aspherical surface	0.6612	0.2973		-0.8475
						S7	Spherical surface	All-round	0.0908	1.52，64.2
S8	Spherical surface	All-round	0.3000
						S9	Spherical surface	All-round

TABLE 4

Referring to fig. 3, fig. 3 is a schematic structural diagram of an optical imaging lens system including four lens elements according to a third embodiment of the present invention. In the present embodiment, similar components are denoted by similar reference numerals as in the first embodiment, and as shown in fig. 3, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, two third lenses 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configurations of the object-

side surfaces

1, 2, 8, 10 facing the object side a1 and the image-

side surfaces

3, 9, 11 facing the image side a2 in the third embodiment are substantially similar to those in the first embodiment, and the concave-convex configurations of the surfaces, the respective radii of curvature, the lens thicknesses, the aspheric coefficients, and the back focal length of the second lens element and the newly added third lens element are different from those in the first embodiment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 5, and the A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 6. Referring to table 5 and fig. 3, S1 and S2 … S6 in table 5 correspond to 6 faces 2 and 3 … 7 in fig. 3, respectively, S7 and S8 correspond to two

faces

11 and 12 in fig. 3, respectively, S1 … S11 denotes a face of a lens, and the thickness of S1 … S11 denotes a distance from the face to the next face.

TABLE 5

Flour mark	Surface type	Radius of curvature (mm)	Thickness (mm)	Material	Coefficient of cone
						OBJ	Spherical surface	All-round	350.3500
STO	Spherical surface	All-round	-0.0343
						S1	Aspherical surface	1.2460	0.2453	1.53，60.0	-1.0668
S2	Aspherical surface	4.2714	0.1716		-83.1991
						S3	Aspherical surface	-6.8644	0.3347	1.61，27.1	2.2659
S4	Aspherical surface	-2.2923	0.0440		3.1066
						S5	Aspherical surface	-1.2027	0.5885	1.53，60.0	-2.2348
S6	Aspherical surface	-0.7392	0.0309		-4.6236
						S7	Aspherical surface	1.3585	0.5685	1.68，19.0	-28.1256
S8	Aspherical surface	0.6606	0.3059		-0.8419
						S9	Spherical surface	All-round	0.1100	1.52，64.2
S10	Spherical surface	All-round	0.2800
						S11	Spherical surface	All-round	0.0000

TABLE 6

Referring to fig. 4, fig. 4 is a schematic structural diagram of an optical imaging lens system including four lens elements according to a fourth embodiment of the present invention. In the present embodiment, similar components are denoted by similar reference numerals as in the first embodiment, and as shown in fig. 4, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, two third lenses 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configuration of the object-

side surfaces

1, 2, 8, 10 facing the object side a1 and the image-

side surfaces

3, 9, 11 facing the image side a2 in the fourth embodiment is substantially similar to that in the first embodiment, and the concave-convex configuration of the surface of the image plane 5 of the second lens element 102, the respective radii of curvature, the lens thicknesses, the aspheric coefficients and the back focal length are different from those in the first embodiment. In more detail, the imaging surface 5 of the second lens 102 has a flatter convex surface portion located in the area near the optical axis than the third embodiment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 7, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 8. Referring to table 7 and fig. 4, S1 and S2 … S6 in table 7 correspond to 6 faces 2 and 3 … 7 in fig. 4, respectively, S7 and S8 correspond to two

faces

11 and 12 in fig. 4, respectively, S1 … S11 denotes a face of a lens, and the thickness of S1 … S11 denotes a distance from the face to the next face.

TABLE 7

TABLE 8

Referring to fig. 5, fig. 5 is a schematic structural diagram of an optical imaging lens system including four lens elements according to a fifth embodiment of the present invention. In this embodiment, similar components are denoted by similar reference numerals as in the third embodiment, and as shown in fig. 5, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configuration of the object-

side surfaces

1, 2, 8, 10 facing the object side a1 and the image-

side surfaces

3, 9, 11 facing the image side a2 in the fifth embodiment is substantially similar to that in the first embodiment, and the concave-convex configuration of the surface of the object-side surface 4 of the second lens element 102, the respective radii of curvature, the lens thicknesses, the aspheric coefficients, and the back focal length are different from those in the first embodiment. In more detail, the object side surface 4 of the second lens 102 has a concave portion located in a region near the optical axis compared to the third embodiment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 9, and the A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 10. Referring to table 9 and fig. 5, S1 and S2 … S6 in table 9 correspond to 6 faces 2 and 3 … 7 in fig. 5, respectively, S7 and S8 correspond to two

faces

11 and 12 in fig. 5, respectively, S1 … S11 denotes a face of a lens, and the thickness of S1 … S11 denotes a distance from the face to the next face.

TABLE 9

Watch 10

Referring to fig. 6, fig. 6 is a schematic structural diagram of an optical imaging lens system including four lens elements according to a sixth embodiment of the present invention. In this embodiment, similar components are denoted by similar reference numerals as in the third embodiment, and as shown in fig. 6, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configuration of the object-

side surfaces

1, 2, 8, 10 facing the object side a1 and the image-

side surfaces

3, 9, 11 facing the image side a2 in the sixth embodiment is substantially similar to that in the first embodiment, and the concave-convex configuration of the surface of the image-side surface 3 of the first lens element 101, the respective radii of curvature, the lens thicknesses, the aspheric coefficients, and the back focal length are different from those in the first embodiment. In more detail, the imaging surface 3 of the first lens 101 has a flatter concave portion located in the vicinity of the optical axis than the third embodiment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 11, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 12. Referring to table 11 and fig. 6, S1 and S2 … S6 in table 11 correspond to 6 faces 2 and 3 … 7 in fig. 6, respectively, S7 and S8 correspond to two

faces

11 and 12 in fig. 6, respectively, S1 … S11 denotes a face of a lens, and the thickness of S1 … S11 denotes a distance from the face to the next face.

TABLE 11

TABLE 12

Referring to fig. 7, fig. 7 is a schematic structural diagram of an optical imaging lens including five lens elements according to a seventh embodiment of the present invention. In the present embodiment, similar components are denoted by similar reference numerals as in the first embodiment, and as shown in fig. 7, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, three third lenses 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configurations of the object-

side surfaces

1, 2, 8, 10 facing the object side a1 and the image-

side surfaces

3, 9, 11 facing the image side a2 in the seventh embodiment are substantially similar to those in the first embodiment, and the concave-convex configurations of the surfaces, the respective radii of curvature, the lens thicknesses, the aspheric coefficients, and the back focal length of the second lens element and the newly added third lens element are different from those in the first embodiment.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 13, and the A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 14. Referring to table 13 and fig. 7, S1 and S2 … S6 in table 13 correspond to 6 faces 2 and 3 … 7 in fig. 7, respectively, S7, S8, S9, and S10 correspond to four faces 11, 12, 13, and 14 in fig. 7, respectively, S1 … S14 denotes a face of a lens, and the thickness of S1 … S14 denotes a distance from the face to the next face.

Watch 13

Flour mark	Surface type	Radius of curvature (mm)	Thickness (mm)	Material	Coefficient of cone
						OBJ	Spherical surface	All-round	350.3500
STO	Spherical surface	All-round	-0.0286
						S1	Aspherical surface	1.4157	0.2450	1.53，60.0	-1.5972
S2	Aspherical surface	4.5024	0.1508		-99.0000
						S3	Aspherical surface	58.2715	0.2822	1.60，28.1	47.5582
S4	Aspherical surface	-4.2337	0.0705		15.3756
						S5	Aspherical surface	-1.1542	0.5798	1.54，60.0	-2.2668
S6	Aspherical surface	-0.6286	0.0200		-4.6922
						S7	Aspherical surface	1.3754	0.2533	1.68，19.0	-11.7650
S8	Aspherical surface	-9.8208	0.0524		49.4411
						S9	Spherical surface	-9.9592	0.1848	1.68，19.1
S10	Spherical surface	0.6480	0.3111
						S11	Spherical surface	All-round	0.1067	1.52，64.2
S12	Spherical surface	All-round	0.3300
						S13	Spherical surface	All-round	0.0000

TABLE 14

Referring to fig. 8, fig. 8 is a schematic structural diagram of an optical imaging lens including five lens elements according to an eighth embodiment of the present invention. In this embodiment, similar components are denoted by similar reference numerals as in the first embodiment, and as shown in fig. 8, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configuration of the object-

side surfaces

1, 2, 4, 6, 8 facing the object side a1 and the image-

side surfaces

5, 7, 9 facing the image side a2 in the eighth embodiment is substantially similar to that in the first embodiment, and the concave-convex configuration of the surface of the image-side surface 9 of the third lens element 103, the respective radii of curvature, the lens thicknesses, the aspheric coefficients, the back focal length, and other relevant optical parameters are different from those in the seventh embodiment. In more detail, the imaging surface 9 of the third lens 103 has a flatter convex surface portion located in the vicinity of the optical axis.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 15, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 16. Referring to table 15 and fig. 8, S1 and S2 … S6 in table 15 correspond to 6 faces 2 and 3 … 7 in fig. 8, respectively, S7, S8, S9, and S10 correspond to four faces 11, 12, 13, and 14 in fig. 8, respectively, S1 … S9 denotes a face of a lens, and the thickness of S1 … S9 denotes a distance from the face to the next face.

Watch 15

Flour mark	Surface type	Radius of curvature (mm)	Thickness (mm)	Material	Coefficient of cone
						OBJ	Spherical surface	All-round	350.3500
STO	Spherical surface	All-round	-0.0309
						S1	Aspherical surface	1.4232	0.2434	1.54，57.4	-1.6522
S2	Aspherical surface	4.5681	0.1459		-62.0778
						S3	Aspherical surface	39.2306	0.2674	1.62，25.7	47.5582
S4	Aspherical surface	-4.0180	0.0669		21.1907
						S5	Aspherical surface	-1.1597	0.5764	1.54，60.0	-2.3592
S6	Aspherical surface	-0.4835	0.0200		-4.6699
						S7	Aspherical surface	3.3513	0.2374	1.68，19.0	-2.2464
S8	Aspherical surface	132.1052	0.0756		-99.0000
						S9	Spherical surface	-19.5019	0.1800	1.64，21.7
S10	Spherical surface	0.6522	0.2983
						S11	Spherical surface	All-round	0.1067	1.52，64.2
S12	Spherical surface	All-round	0.3300
						S13	Spherical surface	All-round	0.0000

TABLE 16

Referring to fig. 9, fig. 9 is a schematic structural diagram of an optical imaging lens including five lens elements according to a ninth embodiment of the present invention. In this embodiment, similar components are denoted by similar reference numerals as in the ninth embodiment, and as shown in fig. 9, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, at least one third lens 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configurations of the object-

side surfaces

1, 2, 4, 6, 8 facing the object side a1 and the image-

side surfaces

5, 7, 9 facing the image side a2 in the ninth embodiment are substantially similar to those in the seventh embodiment, and the optical parameters of the imaging surface 3 of the first lens element 101 and the imaging surface 9 of the third lens element 103, such as the concave-convex configuration of the surfaces, the respective radii of curvature, the lens thicknesses, the aspheric coefficients and the back focal length, are different from those in the first embodiment. In more detail, the imaging surface 3 of the first lens 101 has a concave portion located in a region near the optical axis, and the imaging surface 9 of the third lens 103 has a concave portion located in a region near the optical axis.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 17, and the A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 18. Referring to table 17 and fig. 9, S1 and S2 … S6 in table 17 correspond to 6 faces 2 and 3 … 7 in fig. 9, respectively, S7, S8, S9, and S10 correspond to four faces 11, 12, 13, and 14 in fig. 9, respectively, S1 … S9 denotes a face of a lens, and the thickness of S1 … S9 denotes a distance from the face to the next face.

TABLE 17

Watch 18

Referring to fig. 10, fig. 10 is a schematic structural diagram of an optical imaging lens including five lens elements according to a tenth embodiment of the present invention. In the present embodiment, similar components are denoted by similar reference numerals as in the seventh embodiment, and as shown in fig. 10, the optical imaging lens includes, in order from an object side a1 to an image side a2, a stop 104, a first lens 101, a second lens 102, three third lenses 103, a light-transmitting sheet 105, and an image plane 106.

The concave-convex configurations of the object-

side surfaces

1, 2, 4, 6, 8 facing the object side a1 and the image-

side surfaces

5, 7, 9 facing the image side a2 in the tenth embodiment are substantially similar to those in the seventh embodiment, and the optical parameters of the concave-convex configuration of the surface of the image side surface 9 of the third lens element 103 and the object-side surface 10 of the third lens element 103, the radii of curvature, the lens thickness, the aspheric coefficients, and the back focal length are different from those in the first embodiment. In more detail, the imaging surface 3 of the first lens 101 has a concave portion located in a region near the optical axis, the imaging surface 9 of the third lens 103 has a concave portion located in a region near the optical axis, and the object-side surface 10 of the third lens 103 has a convex portion located in a region near the optical axis.

For the surface numbers, surface types, curvature radii, thicknesses, materials, cone coefficients of the present embodiment, please refer to table 19, and the values of A, B, C, D, E, F, G, H and J-order correction coefficients corresponding to each surface number, please refer to table 20. Referring to table 19 and fig. 10, S1 and S2 … S6 in table 19 correspond to 6 faces 2 and 3 … 7 in fig. 10, respectively, S7, S8, S9, and S10 correspond to four faces 11, 12, 13, and 14 in fig. 10, respectively, S1 … S9 denotes a face of a lens, and the thickness of S1 … S9 denotes a distance from the face to the next face.

Watch 19

Watch 20

For values of optical parameters F1(mm), F2(mm), F3(mm), F4(mm), F5(mm), F (mm), TT L (mm), IMGH (mm), FOV (°), EPD (mm) and IMHG/EPD, TT L/IMGH, FOV (°), F/EPD, F1/F, (CT1+ CT2+ CT3)/TT L, | R4/R3|, (R5-R6)/(R5+ R6), CT1/(T12+ T23), R1/F1 in all embodiments of the present application, please refer to tables 21 and 22.

TABLE 21

TABLE 22

Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, the computer program enabling a computer to execute a part or all of the steps of any one of the methods as described in the above method embodiments, and the computer includes an imaging device.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising an imaging device.

It can be understood that, since the method embodiment and the apparatus embodiment are different presentation forms of the same technical concept, the content of the method embodiment portion in the present application should be synchronously adapted to the apparatus embodiment portion, and is not described herein again.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides an optical imaging lens under display screen which characterized in that is applied to imaging device, imaging device includes a plurality of lenses, includes in proper order along the optical axis from the object side to the image plane:

2. The optical imaging lens of claim 1, wherein the first lens, the second lens and the at least one third lens of the optical imaging lens satisfy the following conditional expressions:

IMHG/EPD>2；

3. The optical imaging lens of claim 2, wherein the first lens, the second lens and the at least one third lens of the optical imaging lens satisfy the following conditional expressions:

TT L/IMHG <2 and FOV >90 °;

4. The optical imaging lens according to claim 3, characterized in that the optical imaging lens satisfies the following condition:

F/EPD<3；

wherein F represents an effective focal length of the optical imaging lens.

5. The optical imaging lens according to claim 4, characterized in that the optical imaging lens satisfies the following condition:

0.5<F1/F<3.5；

wherein the F1 represents an effective focal length of the first lens.

6. The optical imaging lens according to claim 5, characterized in that the optical imaging lens satisfies the following condition:

0.2<(CT1+CT2+CT3)/TTL<0.8；

7. The optical imaging lens according to claim 6, characterized in that the optical imaging lens satisfies the following condition:

|R4/R3|<2；

8. The optical imaging lens according to claim 7, characterized in that the optical imaging lens satisfies the following condition:

0<(R5-R6)/(R5+R6)<1.5；

9. The optical imaging lens according to claim 8, characterized in that the optical imaging lens satisfies the following condition:

CT1/(T12+T23)<2；

10. The optical imaging lens according to claim 9, characterized in that the optical imaging lens satisfies the following condition:

0<R1/F1<1.5；

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that an object side surface and an imaging surface of any one of the first lens, the second lens and the at least one third lens are aspheric;

12. The optical imaging lens of claim 11, wherein the surface shapes of the first lens, the second lens and the at least one third lens are determined according to a preset aspheric formula, and the preset aspheric formula is as follows:

wherein z is a distance vector height from an aspheric vertex when the aspheric surfaces of the first lens, the second lens and the at least one third lens are at a position with a height r along the optical axis direction; c is the paraxial curvature of the aspheric surface, wherein c is 1/R, wherein R is the curvature radius; k is a conic coefficient; A. b, C, D, E, F, G, H and J denote correction coefficients of order 4, 6, 8, 10, 12, 14, 16, 18 and 20 of r, respectively.

13. An imaging apparatus, characterized by comprising the optical imaging lens according to any one of claims 1 to 12.