CN215895094U

CN215895094U - Optical imaging lens

Info

Publication number: CN215895094U
Application number: CN202122459260.3U
Authority: CN
Inventors: 宁宁; 王彬清; 杨萌; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-02-22
Anticipated expiration: 2031-10-12

Abstract

The application discloses an optical imaging lens, it includes from the object side to the image side along the optical axis in proper order: a first lens having a refractive power, an image-side surface being a concave surface; a second lens having a focal power, wherein the object-side surface is a convex surface, and the image-side surface is a concave surface; the image side surface of the third lens is a convex surface; a fourth lens, a fifth lens, a sixth lens and a seventh lens which have focal power; and an eighth lens having a negative refractive power, an image-side surface of which is concave; and wherein any two adjacent lenses have a space therebetween; an on-axis distance SAG51 between an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens and an on-axis distance SAG81 between an intersection point of an object-side surface of the eighth lens and the optical axis to an effective radius vertex of the object-side surface of the eighth lens satisfy: SAG81/SAG51 is more than or equal to 0.5 and less than 3.0; the optical distortion OPD of the optical imaging lens meets the following requirements: the | OPD | < 5.0%; and the number of lenses having power in the optical imaging lens is eight.

Description

Optical imaging lens

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.

Background

The market for mobile phones is very competitive. When new machines come into the market every year, the photographing modules of the new machines are one of the main bright spots. A photo module is generally provided therein with an image sensor of a Charge Coupled Device (CCD) type or an image sensor of a Complementary Metal Oxide Semiconductor (CMOS) type, and is provided with an optical imaging lens. The optical imaging lens can collect light rays on the object side, the imaging light rays travel along the light path of the optical imaging lens and irradiate the image sensor, and then the image sensor converts optical signals into electric signals to form image data.

Mobile phone manufacturers want the camera module to have a wider field of view while maintaining a higher imaging quality. However, the wide-angle lens collects marginal light rays, optical distortion is large during imaging, and then distortion may occur in a use scene such as a shot portrait.

Disclosure of Invention

The present application provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: the optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens having a refractive power, an image-side surface of which is concave; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having a negative refractive power, an image-side surface of which is concave; and wherein any two adjacent lenses have a space therebetween; an on-axis distance SAG51 between an intersection point of the object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens and an on-axis distance SAG81 between an intersection point of the object-side surface of the eighth lens and the optical axis to an effective radius vertex of the object-side surface of the eighth lens may satisfy: SAG81/SAG51 is more than or equal to 0.5 and less than 3.0; the optical distortion OPD of the optical imaging lens can satisfy the following conditions: the | OPD | < 5.0%; and the number of lenses having power in the optical imaging lens is eight.

In one embodiment, the object-side surface of the first lens element to the image-side surface of the eighth lens element have at least one aspherical mirror surface.

In one embodiment, a distance TTL from an object side surface of the first lens to an imaging surface on an optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface may satisfy: TTL/ImgH is less than 1.7.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: f/EPD < 2.5.

In one embodiment, half of the maximum field angle Semi-FOV of the optical imaging lens may satisfy: Semi-FOV > 35.

In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens may satisfy: 1.0 < f1/R1 < 4.5.

In one embodiment, the radius of curvature R15 of the object-side surface of the eighth lens element and the radius of curvature R16 of the image-side surface of the eighth lens element may satisfy: 1.0 < | R15|/R16 < 2.0.

In one embodiment, the radius of curvature R10 of the image-side surface of the fifth lens and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: 1.5 < | R10/R12| < 2.5.

In one embodiment, the optical imaging lens further comprises a diaphragm; the distance TTL between the object side surface of the first lens and the imaging surface on the optical axis and the distance SD between the diaphragm and the image side surface of the eighth lens on the optical axis can satisfy the following conditions: TTL/SD is more than 1.0 and less than 2.1.

In one embodiment, the distance TTL between the object side surface of the first lens element and the imaging surface on the optical axis and the total effective focal length f of the optical imaging lens can satisfy: TTL/f is more than 0.5 and less than 2.6.

In one embodiment, a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1.0 < T45/T56 < 4.5.

In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT8 of the eighth lens on the optical axis may satisfy: CT8/CT2 is more than 1.5 and less than or equal to 2.0.

In one embodiment, the effective focal length f3 of the third lens and the radius of curvature R6 of the image side surface of the third lens may satisfy: -2.0 < f3/R6 < -0.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R4 of the image side surface of the second lens satisfy: f/R4 is more than 1.0 and less than 2.0.

In one embodiment, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens may satisfy: 2.5-less (ET2+ ET3)/(ET2-ET3) < 7.0.

In one embodiment, an on-axis distance SAG62 between an intersection of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens and an edge thickness ET6 of the sixth lens may satisfy: -2.5. ltoreq. SAG62/ET6 < -2.0.

In one embodiment, the abbe number V1 of the first lens and the abbe number V2 of the second lens may satisfy: V1-V2 is less than or equal to 37.

In one embodiment, the abbe number V8 of the eighth lens and the abbe number V3 of the third lens may satisfy: V8-V3 is less than or equal to 31.

In one embodiment, the abbe number V6 of the sixth lens and the abbe number V5 of the fifth lens may satisfy: V6-V5 is less than or equal to 36.

Another aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a refractive power, an image-side surface of which is concave; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having a negative refractive power, an image-side surface of which is concave; and wherein any two adjacent lenses have a space therebetween; the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface can satisfy the following conditions: TTL/ImgH is less than 1.7; the optical distortion OPD of the optical imaging lens can satisfy the following conditions: the | OPD | < 5.0%; and the number of lenses having power in the optical imaging lens is eight.

In one embodiment, an on-axis distance SAG51 between an intersection of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens and an on-axis distance SAG81 between an intersection of an object-side surface of the eighth lens and the optical axis to an effective radius vertex of the object-side surface of the eighth lens may satisfy: 0.5 is less than or equal to SAG81/SAG51 is less than 3.0.

The optical imaging lens has the beneficial effects that the eight lenses are adopted, the focal power, the surface type and the central thickness of each lens and the on-axis distance between the lenses are reasonably distributed, so that the optical imaging lens has at least one beneficial effect of high imaging quality, large field angle, small distortion, high integration degree and the like.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application; fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application; fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application; fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application; fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application; fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application; fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The features, principles, and other aspects of the present application are described in detail below.

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis. In the first to eighth lenses, any adjacent two lenses may have an air space therebetween.

In an exemplary embodiment, the first lens has a positive or negative power; the second lens has positive focal power or negative focal power, the object side surface of the second lens can be a convex surface, and the image side surface of the second lens can be a concave surface; the third lens can have positive focal power, and the image side surface of the third lens can be a convex surface; the fourth lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power; the sixth lens has positive focal power or negative focal power; the seventh lens has positive focal power or negative focal power; the eighth lens element may have a negative optical power, and the image-side surface thereof may be concave. The low-order aberration of the lens is effectively balanced and controlled by reasonably controlling the positive and negative distribution of the focal power of each component of the lens and the lens surface curvature, and the optical imaging lens can realize the effects of wide angle and small distortion. Various aberrations of the optical imaging lens can be effectively balanced, the shooting image quality of the optical imaging lens is clearer and purer, and the optical imaging lens has an excellent optical effect.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The stop may be disposed at an appropriate position as needed, for example, between the object side and the first lens, between the second lens and the third lens, or the like. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: and the TTL/SD is less than 2.1, wherein the TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, and the SD is the distance between the diaphragm and the image side surface of the eighth lens on the optical axis. By restricting the relation between the position of the diaphragm on the optical axis and the optical total length of the optical imaging lens, the optical distortion of the optical imaging lens can be reasonably controlled, so that the optical imaging lens has good distortion performance. Illustratively, TTL and SD may satisfy: TTL/SD is more than 1.15 and less than 1.75.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 0.5 and more than or equal to SAG81/SAG51 and less than 3.0, wherein SAG51 is the on-axis distance from the intersection point of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens, and SAG81 is the on-axis distance from the intersection point of the object side surface of the eighth lens and the optical axis to the effective radius vertex of the object side surface of the eighth lens. By controlling the object side rise of the eighth lens element and the object side rise of the fifth lens element, the inclination angles of the object side of the fifth lens element and the object side of the eighth lens element can be effectively controlled, the ghost risk of the optical imaging lens is reduced, and the imaging quality of the optical imaging lens is improved. Illustratively, SAG51 and SAG81 may satisfy: 0.50 is less than or equal to SAG81/SAG51 is less than 2.80.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: the OPD < 5.0%, wherein the OPD is the optical distortion of the optical imaging lens. The optical imaging lens meets the conditional expression and has the characteristic of small distortion.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: TTL/ImgH < 1.7, wherein, TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, and ImgH is half of the length of the diagonal line of the effective pixel area on the imaging surface. By compressing the ratio of the total optical length to the image height as much as possible, the structure of the optical imaging lens can be more compact. The optical imaging lens can be better integrated in devices such as mobile phones and the like, and ensures that the mobile phones and the like have excellent high-definition image quality output.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: f/EPD < 2.5, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. The optical imaging golden hook can have a large enough entrance pupil diameter after meeting the conditional expression, so that the optical imaging golden hook can be used for irradiating light rays on an image surface as much as possible, and the optical imaging lens can adapt to more variable photographing environments, for example, good imaging quality can be obtained in a dark environment. Illustratively, f and EPD may satisfy: f/EPD < 2.30.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: Semi-FOV >35 deg., wherein Semi-FOV is half of the maximum field angle of the optical imaging lens. The condition is satisfied, the view field angle of the optical imaging lens can be larger than 70 degrees, and the optical imaging lens is ensured to obtain a wider imaging range. Illustratively, the Semi-FOV may satisfy: Semi-FOV > 37.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.0 < f1/R1 < 4.5, wherein f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object side of the first lens. The focal power of the first lens can be controlled in a reasonable interval by controlling the ratio of the effective focal length of the first lens to the curvature radius of the image side surface of the first lens, so that the first lens bears the focal power required by the optical imaging lens, the spherical aberration contributed by the first lens is in a controllable range, the rear lens can correct the contributed spherical aberration easily, and the image quality of an on-axis view field of the optical imaging lens is better ensured. Illustratively, f1 and R1 may satisfy: 1.3 < f1/R1 < 4.5.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.0 < | R15|/R16 < 2.0, wherein R15 is the radius of curvature of the object-side surface of the eighth lens, and R16 is the radius of curvature of the image-side surface of the eighth lens. The curvature radius of the mirror surface of the eighth lens can be controlled to meet the condition that R15/R16 is less than 2.0, and then the coma contribution rate of the eighth lens is in a controllable range, so that the coma generated by each lens in the optical imaging lens can be well balanced. The off-axis field of view of the optical imaging lens can obtain good imaging quality. Illustratively, R15 and R16 may satisfy: 1.30 < | R15|/R16 < 1.80.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.5 < | R10/R12| < 2.5, wherein R10 is a radius of curvature of an image-side surface of the fifth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. By controlling the curvature radius ratio of the image side surface of the fifth lens and the image side surface of the sixth lens, the optical imaging lens can well realize deflection of an optical path. Illustratively, R10 and R12 may satisfy: 1.70 < | R10/R12| < 2.35.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 0.5 < TTL/f < 2.6, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, and f is the total effective focal length of the optical imaging lens. The optical imaging lens is beneficial to maintaining the characteristic of miniaturization by restricting the ratio of the total optical length to the total effective focal length. Illustratively, TTL and f may satisfy: TTL/f is more than 0.50 and less than 2.55.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.0 < T45/T56 < 4.5, wherein T45 is the distance between the fourth lens and the fifth lens on the optical axis, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. The conditional expression is satisfied: 1.0 < T45/T56 < 4.5, and the air space of the fourth lens to the sixth lens on the optical axis can be controlled, so that the curvature of field of the optical imaging lens can be controlled, and the aberration of the optical imaging lens at an off-axis visual field is smaller. Illustratively, T45 and T56 may satisfy: 1.30 < T45/T56 < 4.20.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.5 < CT8/CT2 < 2.0, wherein CT2 is the central thickness of the second lens on the optical axis, and CT8 is the central thickness of the eighth lens on the optical axis. By controlling the ratio of the central thicknesses of the eighth lens and the second lens within the range, the distortion contribution of the optical imaging lens at each field of view can be controlled within a reasonable range, and thus the imaging quality of the optical imaging lens is improved. Illustratively, CT2 and CT8 may satisfy: CT8/CT2 is more than 1.60 and less than or equal to 2.0.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: -2.0 < f3/R6 < -0.5, wherein f3 is the effective focal length of the third lens and R6 is the radius of curvature of the image-side surface of the third lens. By restricting the ratio of the effective focal length of the third lens to the curvature radius of the image side surface of the third lens, the spherical aberration contributed by the third lens to the optical imaging lens can be well controlled, so that the optical imaging lens has good imaging quality in the on-axis view field. Illustratively, f3 and R6 may satisfy: -1.7 < f3/R6 < -0.6.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 1.0 < f/R4 < 2.0, wherein f is the total effective focal length of the optical imaging lens, and R4 is the radius of curvature of the image side surface of the second lens. By controlling the ratio of the total effective focal length to the curvature radius of the image side surface of the second lens, the deflection angle of the light at the second lens can be controlled, so that the sensitivity of the optical imaging lens can be effectively reduced. Illustratively, f and R4 may satisfy: f/R4 is more than 1.15 and less than 1.85.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: 2.5 ≦ (ET2+ ET3)/(ET2-ET3) < 7.0, wherein ET2 is the edge thickness of the second lens and ET3 is the edge thickness of the third lens. By controlling the ratio of the edge thickness of the first lens to the edge thickness of the second lens, the condition of uneven thickness of the lens can be effectively prevented, so that the over-sensitivity of the lens is favorably reduced, and the lens is convenient to machine and form.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: -2.5 ≦ SAG62/ET6 < -2.0, where SAG62 is the on-axis distance between the intersection of the image-side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image-side surface of the sixth lens, and ET6 is the edge thickness of the sixth lens. The conditional expression is satisfied: SAG62/ET6 is more than or equal to-2.5 and less than-2.0, and the deflection angle of marginal rays in the optical imaging lens can be well controlled, so that the sensitivity of the optical imaging lens is effectively reduced.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: V1-V2 ≦ 37, wherein V1 is the Abbe number of the first lens, and V2 is the Abbe number of the second lens. The conditional expression is satisfied: V1-V2 is not more than 37, which is beneficial to enabling light rays with different wavelengths to continue the propagation direction after entering the optical imaging lens, provides a better basis for the optical imaging lens to eliminate various chromatic aberrations, and enables the optical imaging lens to introduce light rays in different directions better, thereby being beneficial to expanding the diameter of the entrance pupil.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: V8-V3 ≦ 31, wherein V8 is the Abbe number of the eighth lens and V3 is the Abbe number of the third lens. The conditional expression is satisfied: V8-V3 is not more than 31, so that light rays have good dispersion correction characteristics after passing through the optical imaging lens, and the difference between the on-axis chromatic aberration and the magnification of the optical imaging lens can be optimized.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression: V6-V5 is less than or equal to 36, wherein V6 is the Abbe number of the sixth lens, and V5 is the Abbe number of the fifth lens. By controlling the difference value of the Abbe number of the sixth lens and the Abbe number of the fifth lens, the dispersion range of the light is well controlled before the light enters the image plane. The fifth lens and the sixth lens with higher abbe numbers can give consideration to the dispersion property and the processing property, so that various color difference values of the optical imaging lens are better optimized and balanced. The optical imaging lens can obtain very good imaging performance.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the optical imaging lens can be effectively reduced, and the compactness of the optical imaging lens installed in equipment such as a mobile phone can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products. Meanwhile, the optical imaging lens further has excellent optical properties such as large visual angle, high imaging quality and low optical distortion.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the eighth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 1

In embodiment 1, the value of the total effective focal length f of the optical imaging lens is 4.12mm, the value of the on-axis distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S19 is 5.73mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 is 4.95mm, and the value of the half Semi-FOV of the maximum angle of view is 49.5 °.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.9505E-02

1.8121E-01

-1.5025E+00

6.3509E+00

-1.6322E+01

2.5927E+01

-2.4829E+01

1.3125E+01

-2.9389E+00

S2

-2.8667E-03

-2.5480E-01

1.9044E+00

-8.3087E+00

2.2526E+01

-3.7947E+01

3.8547E+01

-2.1461E+01

4.9704E+00

S3

-1.0144E-01

-9.9068E-02

5.7717E-01

-2.3133E+00

5.5080E+00

-7.6722E+00

5.6521E+00

-1.5752E+00

-1.5400E-01

S4

-9.1249E-02

-9.6159E-02

5.0307E-01

-1.8711E+00

4.2730E+00

-6.1462E+00

5.3885E+00

-2.6365E+00

5.4727E-01

S5

-1.7022E-02

1.3582E-02

-5.6559E-02

-1.1102E-03

4.2793E-01

-1.1298E+00

1.3368E+00

-7.5987E-01

1.6782E-01

S6

-2.6617E-02

1.8649E-01

-9.0246E-01

2.3769E+00

-4.1157E+00

4.6895E+00

-3.3608E+00

1.3677E+00

-2.3902E-01

S7

-1.8054E-01

4.4349E-01

-1.1995E+00

2.1627E+00

-2.6058E+00

2.0715E+00

-1.0358E+00

2.9500E-01

-3.6662E-02

S8

-1.8619E-01

3.0338E-01

-5.3868E-01

6.9511E-01

-6.2047E-01

3.7490E-01

-1.4566E-01

3.3262E-02

-3.4439E-03

S9

-2.2985E-01

5.5183E-01

-1.2600E+00

2.1646E+00

-2.3784E+00

1.6876E+00

-7.5589E-01

1.9380E-01

-2.1573E-02

S10

-2.2811E-01

4.4542E-01

-6.5390E-01

6.3791E-01

-3.4485E-01

9.5044E-02

-9.3418E-03

-9.6723E-04

2.0128E-04

S11

2.1503E-01

-6.8432E-02

-1.1620E-01

1.9117E-01

-1.3073E-01

4.9355E-02

-1.0489E-02

1.1103E-03

-3.8159E-05

S12

1.1803E-01

-1.0848E-01

1.1651E-01

-7.3530E-02

2.9001E-02

-7.4751E-03

1.2269E-03

-1.1737E-04

5.0797E-06

S13

-1.1739E-01

6.4687E-03

2.7098E-02

-1.6524E-02

4.9177E-03

-8.8202E-04

1.0036E-04

-6.9841E-06

2.3200E-07

S14

4.5336E-03

-4.3512E-02

3.2929E-02

-1.2200E-02

2.6517E-03

-3.5703E-04

2.9515E-05

-1.3833E-06

2.8329E-08

S15

-5.3218E-03

5.2580E-03

-1.6797E-03

2.6648E-04

-2.1852E-05

8.2892E-07

-2.9446E-09

-7.0678E-10

1.4816E-11

S16

-3.2461E-02

1.3601E-02

-4.1362E-03

7.6778E-04

-9.1674E-05

7.0843E-06

-3.3996E-07

9.1470E-09

-1.0498E-10

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

In embodiment 2, the value of the total effective focal length f of the optical imaging lens is 4.12mm, the value of the on-axis distance TTL from the object side face S1 of the first lens E1 to the imaging face S19 is 5.75mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging face S19 is 4.95mm, and the value of the half Semi-FOV of the maximum angle of view is 49.5 °.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.9116E-02

1.7845E-01

-1.3810E+00

5.5489E+00

-1.3558E+01

2.0402E+01

-1.8399E+01

9.0818E+00

-1.8767E+00

S2

-5.7153E-03

-2.2459E-01

1.7531E+00

-7.7777E+00

2.1249E+01

-3.5907E+01

3.6463E+01

-2.0218E+01

4.6390E+00

S3

-1.0304E-01

-7.2316E-02

4.1508E-01

-1.7057E+00

3.9689E+00

-5.0752E+00

2.8587E+00

1.5551E-01

-6.2021E-01

S4

-9.0812E-02

-8.7794E-02

4.5939E-01

-1.7659E+00

4.1321E+00

-6.0294E+00

5.3170E+00

-2.5988E+00

5.3653E-01

S5

-1.9308E-02

1.8931E-02

-8.2438E-02

6.5701E-02

3.0307E-01

-9.3630E-01

1.1308E+00

-6.3884E-01

1.3872E-01

S6

-1.8499E-02

1.3919E-01

-6.6147E-01

1.6021E+00

-2.6327E+00

2.9814E+00

-2.1911E+00

9.2844E-01

-1.6955E-01

S7

-1.7914E-01

4.3492E-01

-1.1049E+00

1.8224E+00

-2.0117E+00

1.4905E+00

-7.0842E-01

1.9513E-01

-2.3836E-02

S8

-1.9348E-01

3.2735E-01

-5.5927E-01

6.7345E-01

-5.5888E-01

3.1747E-01

-1.1806E-01

2.6367E-02

-2.7303E-03

S9

-2.2976E-01

4.8286E-01

-1.0209E+00

1.6267E+00

-1.6182E+00

1.0179E+00

-4.0084E-01

9.0600E-02

-8.9670E-03

S10

-2.2205E-01

4.3560E-01

-6.6499E-01

6.9372E-01

-4.1986E-01

1.4619E-01

-2.8588E-02

2.8377E-03

-1.0762E-04

S11

2.1900E-01

-1.0315E-01

-2.8030E-02

8.5437E-02

-5.9948E-02

2.1490E-02

-4.1077E-03

3.2403E-04

2.6597E-06

S12

1.2160E-01

-1.2028E-01

1.2955E-01

-8.0534E-02

3.0454E-02

-7.1454E-03

9.7906E-04

-6.7041E-05

1.4980E-06

S13

-1.0970E-01

-1.9171E-04

3.6409E-02

-2.4314E-02

8.5906E-03

-1.9126E-03

2.7211E-04

-2.2713E-05

8.4188E-07

S14

-1.1539E-04

-3.2108E-02

2.4308E-02

-8.9070E-03

1.9190E-03

-2.5750E-04

2.1332E-05

-1.0056E-06

2.0722E-08

S15

-5.0636E-03

5.7998E-03

-2.1122E-03

3.8426E-04

-3.7266E-05

1.8787E-06

-3.8389E-08

-2.6974E-10

1.6255E-11

S16

-3.4913E-02

1.3245E-02

-3.6480E-03

6.1719E-04

-6.8821E-05

5.1632E-06

-2.4926E-07

6.9070E-09

-8.2629E-11

TABLE 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

In embodiment 3, the value of the total effective focal length f of the optical imaging lens is 2.60mm, the value of the on-axis distance TTL from the object-side surface S1 to the imaging surface S19 of the first lens E1 is 6.57mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 is 3.95mm, and the value of half Semi-FOV of the maximum angle of view is 56.6 °.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 6 shows the high-order coefficient A which can be used for each aspherical mirror surface in example 3₄、 A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 5

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a convex object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

In embodiment 4, the value of the total effective focal length f of the optical imaging lens is 2.60mm, the value of the on-axis distance TTL from the object side face S1 of the first lens E1 to the imaging face S19 is 6.55mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging face S19 is 3.95mm, and the value of half Semi-FOV of the maximum angle of view is 58.6 °.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

In embodiment 5, the value of the total effective focal length f of the optical imaging lens is 7.98mm, the value of the on-axis distance TTL from the object-side surface S1 to the imaging surface S19 of the first lens E1 is 9.09mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 is 6.40mm, and the value of half Semi-FOV of the maximum field angle is 37.4 °.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from the object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

In embodiment 6, the value of the total effective focal length f of the optical imaging lens is 3.30mm, the value of the on-axis distance TTL from the object side face S1 of the first lens E1 to the imaging face S19 is 4.53mm, the value of half ImgH of the diagonal length of the effective pixel area on the imaging face S19 is 3.99mm, and the value of half Semi-FOV of the maximum angle of view is 50.0 °.

Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.9604E-02

1.4497E-01

-1.2020E+00

5.0807E+00

-1.3058E+01

2.0741E+01

-1.9863E+01

1.0500E+01

-2.3511E+00

S2

-2.2933E-03

-2.0384E-01

1.5235E+00

-6.6470E+00

1.8021E+01

-3.0358E+01

3.0838E+01

-1.7169E+01

3.9763E+00

S3

-8.1153E-02

-7.9254E-02

4.6174E-01

-1.8507E+00

4.4064E+00

-6.1378E+00

4.5217E+00

-1.2602E+00

-1.2320E-01

S4

-7.3000E-02

-7.6927E-02

4.0246E-01

-1.4969E+00

3.4184E+00

-4.9169E+00

4.3108E+00

-2.1092E+00

4.3782E-01

S5

-1.3618E-02

1.0865E-02

-4.5248E-02

-8.8818E-04

3.4234E-01

-9.0388E-01

1.0694E+00

-6.0790E-01

1.3426E-01

S6

-2.1294E-02

1.4919E-01

-7.2197E-01

1.9015E+00

-3.2925E+00

3.7516E+00

-2.6887E+00

1.0941E+00

-1.9121E-01

S7

-1.4443E-01

3.5479E-01

-9.5957E-01

1.7302E+00

-2.0847E+00

1.6572E+00

-8.2866E-01

2.3600E-01

-2.9330E-02

S8

-1.4895E-01

2.4270E-01

-4.3095E-01

5.5609E-01

-4.9637E-01

2.9992E-01

-1.1653E-01

2.6610E-02

-2.7552E-03

S9

-1.8388E-01

4.4146E-01

-1.0080E+00

1.7316E+00

-1.9027E+00

1.3501E+00

-6.0471E-01

1.5504E-01

-1.7258E-02

S10

-1.8249E-01

3.5633E-01

-5.2312E-01

5.1033E-01

-2.7588E-01

7.6035E-02

-7.4735E-03

-7.7378E-04

1.6102E-04

S11

1.7203E-01

-5.4746E-02

-9.2958E-02

1.5294E-01

-1.0458E-01

3.9484E-02

-8.3910E-03

8.8822E-04

-3.0527E-05

S12

9.4424E-02

-8.6784E-02

9.3207E-02

-5.8824E-02

2.3201E-02

-5.9801E-03

9.8154E-04

-9.3893E-05

4.0638E-06

S13

-9.3915E-02

5.1750E-03

2.1678E-02

-1.3219E-02

3.9341E-03

-7.0561E-04

8.0291E-05

-5.5872E-06

1.8560E-07

S14

3.6269E-03

-3.4810E-02

2.6343E-02

-9.7596E-03

2.1214E-03

-2.8563E-04

2.3612E-05

-1.1066E-06

2.2663E-08

S15

-4.2574E-03

4.2064E-03

-1.3437E-03

2.1319E-04

-1.7481E-05

6.6313E-07

-2.3557E-09

-5.6543E-10

1.1853E-11

S16

-2.5969E-02

1.0880E-02

-3.3090E-03

6.1423E-04

-7.3339E-05

5.6675E-06

-2.7196E-07

7.3176E-09

-8.3983E-11

TABLE 12

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

In summary, examples 1 to 6 each satisfy the relationship shown in table 13.

Watch 13

The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a refractive power, an image-side surface of which is concave;

a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave;

the image side surface of the third lens is a convex surface;

a fourth lens having an optical power;

a fifth lens having optical power;

a sixth lens having optical power;

a seventh lens having optical power; and

an eighth lens having a negative refractive power, an image-side surface of which is concave; and

wherein, a space is arranged between any two adjacent lenses;

an on-axis distance SAG51 between an intersection point of an object-side surface of the fifth lens and the optical axis and an effective radius vertex of an object-side surface of the fifth lens and an on-axis distance SAG81 between an intersection point of an object-side surface of the eighth lens and the optical axis and an effective radius vertex of an object-side surface of the eighth lens satisfy: SAG81/SAG51 is more than or equal to 0.5 and less than 3.0;

the optical distortion OPD of the optical imaging lens meets the following requirements: the | OPD | < 5.0%; and

the number of lenses having power in the optical imaging lens is eight.

2. The optical imaging lens of claim 1, wherein a distance TTL between an object side surface of the first lens element and an imaging plane on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging plane satisfy: TTL/ImgH is less than 1.7.

3. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 2.5.

4. The optical imaging lens of claim 1, wherein the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: Semi-FOV > 35.

5. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: 1.0 < f1/R1 < 4.5.

6. The optical imaging lens of claim 1, wherein the radius of curvature R15 of the object-side surface of the eighth lens and the radius of curvature R16 of the image-side surface of the eighth lens satisfy: 1.0 < | R15|/R16 < 2.0.

7. The optical imaging lens of claim 1, wherein the radius of curvature R10 of the image-side surface of the fifth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 1.5 < | R10/R12| < 2.5.

8. The optical imaging lens of claim 1, characterized in that the optical imaging lens further comprises a diaphragm;

the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the distance SD from the diaphragm to the image side surface of the eighth lens on the optical axis satisfy that: TTL/SD is more than 1.0 and less than 2.1.

9. The optical imaging lens of claim 1, wherein a distance TTL between an object side surface of the first lens element and an imaging surface on the optical axis and a total effective focal length f of the optical imaging lens satisfy: TTL/f is more than 0.5 and less than 2.6.

10. The optical imaging lens according to claim 1, wherein a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.0 < T45/T56 < 4.5.

11. The optical imaging lens of claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: CT8/CT2 is more than 1.5 and less than or equal to 2.0.

12. The optical imaging lens of claim 1, wherein the effective focal length f3 of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: -2.0 < f3/R6 < -0.5.

13. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R4 of the image side surface of the second lens satisfy: f/R4 is more than 1.0 and less than 2.0.

14. The optical imaging lens of claim 1, wherein the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 2.5-less (ET2+ ET3)/(ET2-ET3) < 7.0.

15. The optical imaging lens of claim 1, wherein an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens and an edge thickness ET6 of the sixth lens satisfy: -2.5. ltoreq. SAG62/ET6 < -2.0.

16. The optical imaging lens according to any one of claims 1 to 15, wherein abbe number V1 of the first lens and abbe number V2 of the second lens satisfy: V1-V2 is less than or equal to 37.

17. The optical imaging lens according to any one of claims 1 to 15, wherein abbe number V8 of the eighth lens and abbe number V3 of the third lens satisfy: V8-V3 is less than or equal to 31.

18. The optical imaging lens according to any one of claims 1 to 15, wherein abbe number V6 of the sixth lens and abbe number V5 of the fifth lens satisfy: V6-V5 is less than or equal to 36.

19. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens having a refractive power, an image-side surface of which is concave;

the image side surface of the third lens is a convex surface;

a fourth lens having an optical power;

a fifth lens having optical power;

a sixth lens having optical power;

a seventh lens having optical power; and

wherein, a space is arranged between any two adjacent lenses;

the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH is less than 1.7;

the number of lenses having power in the optical imaging lens is eight.

20. The optical imaging lens of claim 19 wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 2.5.

21. The optical imaging lens of claim 20, wherein an on-axis distance SAG51 between an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens and an on-axis distance SAG81 between an intersection point of an object-side surface of the eighth lens and the optical axis to an effective radius vertex of an object-side surface of the eighth lens satisfy: 0.5 is less than or equal to SAG81/SAG51 is less than 3.0.

22. The optical imaging lens of claim 19, wherein the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: Semi-FOV > 35.

23. The optical imaging lens of claim 19, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: 1.0 < f1/R1 < 4.5.

24. The optical imaging lens of claim 19, wherein the radius of curvature R15 of the object-side surface of the eighth lens and the radius of curvature R16 of the image-side surface of the eighth lens satisfy: 1.0 < | R15|/R16 < 2.0.

25. The optical imaging lens of claim 19, wherein the radius of curvature R10 of the image-side surface of the fifth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 1.5 < | R10/R12| < 2.5.

26. The optical imaging lens of claim 19, characterized in that it further comprises a diaphragm;

the distance TTL between the object side surface of the first lens and the imaging surface on the optical axis and the distance SD between the diaphragm and the image side surface of the eighth lens on the optical axis satisfy that: TTL/SD is more than 1.0 and less than 2.1.

27. The optical imaging lens of claim 19, wherein a distance TTL between an object side surface of the first lens element and the imaging surface on the optical axis and a total effective focal length f of the optical imaging lens satisfy: TTL/f is more than 0.5 and less than 2.6.

28. The optical imaging lens of claim 19, wherein a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.0 < T45/T56 < 4.5.

29. The optical imaging lens of claim 19, wherein a center thickness CT2 of the second lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: CT8/CT2 is more than 1.5 and less than or equal to 2.0.

30. The optical imaging lens of claim 19, wherein the effective focal length f3 of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: -2.0 < f3/R6 < -0.5.

31. The optical imaging lens of claim 19, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R4 of the image side surface of the second lens satisfy: f/R4 is more than 1.0 and less than 2.0.

32. The optical imaging lens of claim 19, wherein the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 2.5-less (ET2+ ET3)/(ET2-ET3) < 7.0.

33. The optical imaging lens of claim 19, wherein an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis and an effective radius vertex of the image-side surface of the sixth lens and an edge thickness ET6 of the sixth lens satisfy: -2.5. ltoreq. SAG62/ET6 < -2.0.

34. An optical imaging lens according to any one of claims 19 to 33, wherein abbe number V1 of the first lens and abbe number V2 of the second lens satisfy: V1-V2 is less than or equal to 37.

35. An optical imaging lens according to any one of claims 19 to 33, wherein abbe number V8 of the eighth lens and abbe number V3 of the third lens satisfy: V8-V3 is less than or equal to 31.

36. An optical imaging lens according to any one of claims 19 to 33, wherein abbe number V6 of the sixth lens and abbe number V5 of the fifth lens satisfy: V6-V5 is less than or equal to 36.