CN215181166U

CN215181166U - Optical imaging lens

Info

Publication number: CN215181166U
Application number: CN202121244884.7U
Authority: CN
Inventors: 陈明; 闻人建科; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-12-14
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses an optical imaging lens, optical imaging lens include according to the preface by thing side to image side along the optical axis: the first lens has positive focal power; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; the third lens may have a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens can have positive focal power or negative focal power, and the object side surface of the fifth lens is a convex surface; wherein an air interval T12 of the first lens and the second lens on the optical axis and an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 1.0 < T12/T34 < 1.5. The utility model provides an optical imaging lens has less head, big image plane, and high resolution's characteristics when improving the screen and account for and module stability, still satisfy higher image plane resolution and clear requirement of formation of image, make comprehensive screen more pleasing to the eye, help improving user experience.

Description

Optical imaging lens

Technical Field

The utility model belongs to the optical imaging field especially relates to an optical imaging lens who comprises five lenses.

Background

Along with the update iteration of portable intelligent terminal, for satisfying the portrait shooting demand of customers widely, the smart mobile phone is also being towards high screen occupation ratio, high luminousness, ultra-thin direction development, and optical imaging lens is as the important function module and the selling point of cell-phone, also corresponding towards littleer head, littleer overall length, high resolution, big light ring, the direction development of high stability, wherein littleer camera lens head size, make the trompil of cell-phone screen littleer, more be favorable to improving the screen occupation ratio of cell-phone, simultaneously littleer head size is favorable to improving the stability of cell-phone module.

Therefore, the utility model provides an optical imaging lens has less head simultaneously, and big image plane, high resolution's characteristics still satisfy higher image plane resolution and clear requirement of formation of image when improving the screen and account for and module stability, make comprehensive screen more pleasing to the eye, help improving user experience.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an optical imaging lens has less head simultaneously, and big image plane, high resolution's characteristics when improving the screen and account for than and module stability, still satisfy higher image plane resolution and clear requirement of formation of image.

The utility model provides an optical imaging lens, this optical imaging lens include according to the preface by thing side to picture side along the optical axis: a diaphragm; a first lens having an optical power; a second lens having a negative refractive power, the object side surface of which is concave; a third lens having a negative optical power; a fourth lens having an optical power; a fifth lens having a refractive power, an object-side surface of which is convex; wherein an air interval T12 of the first lens and the second lens on an optical axis and an air interval T34 of the third lens and the fourth lens on an optical axis satisfy: 1.0 < T12/T34 < 1.5.

According to the utility model discloses an embodiment, optical imaging lens's effective focal length f satisfies with the combined focal length f12 of first lens and second lens: f12/f is more than 0.8 and less than 1.6.

According to the utility model discloses an embodiment, the effective focal length f of optics imaging lens satisfies with the entrance pupil diameter EPD of optics imaging lens: f/EPD is less than or equal to 2.6.

According to an embodiment of the present invention, the combined focal length f45 of the fourth lens element and the fifth lens element satisfies the following relationship with the curvature radius R8 of the image side surface of the fourth lens element: 1.0 < | f45/R8| < 7.5.

According to the utility model discloses an embodiment, the effective focal length f of optical imaging lens satisfies with the combined focal length f123 of first lens, second lens and third lens: f123/f is more than 0.9 and less than 2.0.

According to an embodiment of the present invention, the radius of curvature R6 of the image side surface of the third lens element and the radius of curvature R9 of the object side surface of the fifth lens element satisfy: 1.0 < | R9/R6| < 5.8.

According to an embodiment of the present invention, the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: f1/R1 is more than 1.5 and less than 2.5.

According to an embodiment of the present invention, the air space T23 on the optical axis between the second lens and the third lens and the air space T45 on the optical axis between the fourth lens and the fifth lens satisfy: 1.0 < T45/T23 < 3.6.

According to the utility model discloses an embodiment, first lens object side is to the epaxial distance TTL of imaging surface and imaging surface on the regional diagonal length of effective pixel half ImgH satisfy: TTL/ImgH is less than 1.4.

According to an embodiment of the present invention, the maximum effective radius DT51 of the object-side surface of the fifth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 1.0 < DT52/DT51 < 1.5.

According to an embodiment of the present invention, the refractive index N3 of the third lens and the refractive index N5 of the fifth lens satisfy: N3/N5 is more than 1.0 and less than 1.5.

According to an embodiment of the present invention, the second lens and the third lens are made of the same material, and the refractive index is greater than 1.6.

According to an embodiment of the present invention, half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: 35 < Semi-FOV < 45.

According to the utility model discloses an embodiment, the regional diagonal length's of effective pixel half ImgH satisfies on the imaging plane: ImgH > 3.0 mm.

The utility model has the advantages that:

the utility model provides an optical imaging camera lens includes multi-disc lens, like first lens to fifth lens. The air gap between the first lens and the second lens can be reasonably adjusted by reasonably controlling the ratio of the air gap between the first lens and the second lens on the optical axis to the air gap between the third lens and the fourth lens on the optical axis, so that the distortion of the system can be better balanced, the ghost image energy can be reduced, and the system can be ensured to obtain better imaging quality. The utility model discloses an optical imaging lens has less head, big image plane, and high resolution's characteristics when improving the screen and account for than and module stability, still satisfy higher image plane resolution and clear requirement of formation of image, make comprehensive screen more pleasing to the eye, help improving user experience.

Drawings

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

Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present invention;

fig. 2 is an axial chromatic aberration curve according to embodiment 1 of the optical imaging lens of the present invention;

fig. 3 is an astigmatism curve of the optical imaging lens of embodiment 1 of the present invention;

fig. 4 is a schematic view of a lens assembly structure according to embodiment 2 of the optical imaging lens of the present invention;

fig. 5 is an axial chromatic aberration curve according to embodiment 2 of the optical imaging lens of the present invention;

fig. 6 is an astigmatism curve of the optical imaging lens of embodiment 2 of the present invention;

fig. 7 is a schematic view of a lens assembly structure according to embodiment 3 of the optical imaging lens system of the present invention;

fig. 8 is an axial chromatic aberration curve according to embodiment 3 of the optical imaging lens of the present invention;

fig. 9 is an astigmatic curve of an optical imaging lens according to embodiment 3 of the present invention;

fig. 10 is a schematic view of a lens group structure according to embodiment 4 of an optical imaging lens system of the present invention;

fig. 11 is an axial chromatic aberration curve according to embodiment 4 of the optical imaging lens of the present invention;

fig. 12 is an astigmatism curve of the optical imaging lens system of embodiment 4 of the present invention;

fig. 13 is a schematic view of a lens assembly structure according to embodiment 5 of the optical imaging lens system of the present invention;

fig. 14 is an axial chromatic aberration curve according to embodiment 5 of the optical imaging lens of the present invention;

fig. 15 is an astigmatism curve of the optical imaging lens system of embodiment 5 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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 invention.

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.

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.

In the description of the present invention, the paraxial region means 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.

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, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

Exemplary embodiments

The optical imaging lens of the exemplary embodiment of the present invention includes five lenses, and includes in order from the object side to the image side along the optical axis: the lens comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the lenses are independent from each other, and an air space is formed between the lenses on an optical axis.

In the present exemplary embodiment, the first lens has positive optical power; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; the third lens may have a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens element can have a positive or negative power, and its object-side surface is convex.

In the present exemplary embodiment, an air interval T12 of the first lens and the second lens on the optical axis and an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 1.0 < T12/T34 < 1.5. The air gap between the first lens and the second lens is reasonably controlled according to the ratio of the air gap on the optical axis of the first lens to the air gap on the optical axis of the third lens to the air gap on the optical axis of the fourth lens, the air gap between the lenses is reasonably adjusted, the distortion of a system can be better balanced, ghost image energy is reduced, and the system is ensured to obtain better imaging quality. More specifically, an air interval T12 of the first lens and the second lens on the optical axis and an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 1.0 < T12/T34 < 1.4.

In the present exemplary embodiment, the effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy: f12/f is more than 0.8 and less than 1.6. The combined focal length of the first lens and the second lens is reasonably configured, so that on one hand, the sensitivity of the first lens and the sensitivity of the second lens can be effectively reduced, the requirement of over-strict tolerance is avoided, on the other hand, the spherical aberration, chromatic aberration and astigmatism generated by the first lens and the second lens can be balanced, the resolving power of the system is improved, and the imaging effect of the system is better. More specifically, the effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy: f12/f is more than 0.9 and less than 1.55.

In the present exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD is less than or equal to 2.6. The ratio of the effective focal length of the optical imaging lens to the diameter of the entrance pupil is controlled, so that the optical imaging lens can meet the requirement of smaller head and ensure enough luminous flux to reach the image plane, and the system still has better imaging quality in the environment with weak light.

In the present exemplary embodiment, the combined focal length f45 of the fourth lens and the fifth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: 1.0 < | f45/R8| < 7.5. The combined focal length of the fourth lens and the fifth lens and the curvature radius ratio of the object side surface of the fourth lens are reasonably controlled, so that the deflection degree of light rays in the fourth lens can be well reduced, the sensitivity of the lens is reduced, the convergence of the light rays is facilitated, and the total reflection of the surface of the lens and the generation of ghost images are avoided. More specifically, the combined focal length f45 of the fourth lens and the fifth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.15 < | f45/R8| < 7.45.

In the present exemplary embodiment, the effective focal length f of the optical imaging lens and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy: f123/f is more than 0.9 and less than 2.0. The combined focal length of the first lens, the second lens and the third lens is reasonably distributed, the sensitivity of the three lenses can be better reduced, the too tight tolerance requirement is avoided, the problems of distortion, astigmatism and the like of the whole system are balanced, in addition, a larger image plane can be obtained by controlling the ratio, and the larger imaging image plane is matched, so that the higher imaging quality is achieved. More specifically, the effective focal length f of the optical imaging lens and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy: f123/f is more than 0.95 and less than 1.95.

In the present exemplary embodiment, the radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: 1.0 < | R9/R6| < 5.8. The ratio of the curvature radius of the image side surface of the third lens and the curvature radius of the object side surface of the fifth lens are reasonably controlled, the processing difficulty caused by overlarge mirror surface inclination angle can be avoided, meanwhile, the process sensitivity of the fifth lens can be reduced, better external light convergence can be ensured by matching with the third lens of the optical imaging lens, the spherical aberration and the field curvature of the optical imaging lens are effectively balanced, and the lens can have better imaging quality. More specifically, the radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: 1.30 < | R9/R6| < 5.55.

In the present exemplary embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens satisfy: f1/R1 is more than 1.5 and less than 2.5. The ratio of the focal power of the first lens to the curvature radius of the object side surface of the first lens is reasonably distributed, so that the deflection degree of light rays in the first lens can be better reduced, the sensitivity of the lens is reduced, the system can have higher aberration correction capability while keeping a small head, and better manufacturability can be obtained. More specifically, the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens satisfy: 1.85 < f1/R1 < 2.4.

In the present exemplary embodiment, the air interval T23 of the second lens and the third lens on the optical axis and the air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 1.0 < T45/T23 < 3.6. The air space ratio of the second lens and the third lens on the optical axis to the air space ratio of the fourth lens and the fifth lens on the optical axis is reasonably controlled, light deflection is favorably slowed down, field curvature of a lens can be adjusted, sensitivity is reduced, distortion of a system can be balanced, ghost image energy between the fourth lens and the fifth lens is reduced, and good imaging quality of the system is guaranteed. More specifically, an air interval T23 of the second lens and the third lens on the optical axis and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 1.30 < T45/T23 < 3.8.

In the present exemplary embodiment, the on-axis distance TTL from the object-side surface of the first lens to the imaging plane and the half ImgH of the diagonal length of the effective pixel area on the imaging plane satisfy: TTL/ImgH is less than 1.4. The distance between the object side surface of the first lens and the imaging surface on the axis and the half-image height are reasonably controlled, so that the optical imaging lens has a smaller size, and the space is saved. More specifically, the on-axis distance TTL from the object-side surface of the first lens element to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: TTL/ImgH < 1.38.

In the present exemplary embodiment, the maximum effective radius DT51 of the object-side surface of the fifth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 1.0 < DT52/DT51 < 1.5. The aperture ratio of the fifth lens is reasonably controlled, on one hand, the vignetting value of the system can be effectively controlled, and the part of light with poor imaging quality is intercepted, so that the resolution of the whole system can be improved; on the other hand, the method is beneficial to controlling the segment difference of each lens of the system, is convenient for molding processing and assembling, and ensures the stability of assembling. More specifically, the maximum effective radius DT51 of the object-side surface of the fifth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 1.10 < DT52/DT51 < 1.35.

In the present exemplary embodiment, the refractive index N3 of the third lens and the refractive index N5 of the fifth lens satisfy: N3/N5 is more than 1.0 and less than 1.5. The refractive index ratio of the third lens and the fifth lens is reasonably controlled, so that the magnification chromatic aberration of the off-axis field of view of the system can be reduced, and partial chromatic spherical aberration in the system can be offset. More specifically, the refractive index N3 of the third lens and the refractive index N5 of the fifth lens satisfy: 1.0 < N3/N5 < 1.10.

In the present exemplary embodiment, the second lens is the same material as the third lens, and has a refractive index greater than 1.6. The refractive indexes of the second lens and the third lens are reasonably controlled, spherical aberration and chromatic aberration generated by the two lenses can be effectively balanced, manufacturability is guaranteed, better diopter can be obtained, and imaging quality is improved. More specifically, the refractive index of the second lens and the refractive index of the third lens are larger than 1.65.

In the present exemplary embodiment, half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: 35 < Semi-FOV < 45. The half of the maximum field angle of the optical imaging system is controlled to be larger than 35 degrees and smaller than 45 degrees, so that the object plane information in a larger angle range can be acquired in the actual shooting process, the imaging position of a shot object can be found quickly in the shooting process, and the use experience of consumers is better. More specifically, half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: 37.5 < Semi-FOV < 42.5.

In the present exemplary embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, satisfies: ImgH > 3.0 mm. Having ImgH greater than 3.0mm ensures that the system has an image plane large enough to present more detailed information of the scene. More specifically, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, satisfies: ImgH > 3.30 mm.

In the present exemplary embodiment, the above-described optical imaging lens may further include a diaphragm. The stop may be disposed at an appropriate position as needed, for example, the stop may be disposed between the object side and the first lens. 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.

The optical imaging lens according to the above embodiments of the present invention may adopt a plurality of lenses, for example, the above five lenses. The optical imaging lens has a larger imaging surface by reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, has the characteristics of wide imaging range and high imaging quality, and ensures the ultrathin property of the mobile phone.

In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspheric mirror surface. The aspheric lens is characterized in that: the aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and astigmatic aberration, unlike a spherical lens having a constant curvature from the lens center to the lens periphery, in which the curvature is continuously varied from the lens center to the lens periphery. 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, and the fifth lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens and the fifth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

In embodiments 1-5, the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 are aspheric, and the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric 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); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface.

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 five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five lenses, and may include other numbers of lenses if necessary.

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

Detailed description of the preferred embodiment 1

Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.

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

TABLE 1

As shown in table 2, in embodiment 1, the total effective focal length f of the optical imaging lens is 3.62mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 4.55mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 3.38 mm. Half of the maximum field angle Semi-FOV of the optical imaging lens is 42.2 °. The maximum effective radius DT51 of the object-side surface of the fifth lens is 2.28 mm.

TABLE 2

The optical imaging lens in embodiment 1 satisfies:

T12/T34 is 1.23, where T12 is an air space on the optical axis of the first lens and the second lens, and T34 is an air space on the optical axis of the third lens and the fourth lens.

f12/f is 1.52, wherein f is the effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens.

And f/EPD is 2.55, wherein f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

And | f45/R8| -7.43, wherein f45 is the combined focal length of the fourth lens and the fifth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

And f123/f is 1.52, wherein f is the effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens and the third lens.

And l R9/R6 l is 2.44, wherein R6 is the radius of curvature of the image-side surface of the third lens, and R9 is the radius of curvature of the object-side surface of the fifth lens.

f1/R1 is 2.01, wherein f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object side surface of the first lens.

T45/T23 is 2.27, where T23 is the air space on the optical axis of the second lens and the third lens, and T45 is the air space on the optical axis of the fourth lens and the fifth lens.

And the TTL/ImgH is 1.35, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and the ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

DT52/DT51 is 1.12, where DT51 is the maximum effective radius of the object-side surface of the fifth lens and DT52 is the maximum effective radius of the image-side surface of the fifth lens.

N3/N5 is 1.08, where N3 is the refractive index of the third lens and N5 is the refractive index of the fifth lens.

The second lens and the third lens are made of the same material and have a refractive index of 1.68 degrees.

The Semi-FOV is 42.2 °, where Semi-FOV is half of the maximum field angle of the optical imaging system.

ImgH is 3.38mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane.

In example 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 3 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

TABLE 3

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 3 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 1. As can be seen from fig. 2 to 3, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Specific example 2

Fig. 4 is a schematic view of a lens assembly according to embodiment 2 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.

As shown in table 4, the basic parameter table of the optical imaging lens of embodiment 2 is shown, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).

TABLE 4

As shown in table 5, in embodiment 2, the total effective focal length f of the optical imaging lens is 3.09mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 4.55mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 3.38 mm. Half of the maximum field angle Semi-FOV of the optical imaging lens is 41.2 °. The maximum effective radius DT51 of the object-side surface of the fifth lens is 2.10 mm.

TABLE 5

The optical imaging lens in embodiment 2 satisfies:

T12/T34 is 1.37, where T12 is an air space on the optical axis of the first lens and the second lens, and T34 is an air space on the optical axis of the third lens and the fourth lens.

f12/f is 1.43, where f is the effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens.

And l f45/R8 l is 1.20, wherein f45 is the combined focal length of the fourth lens and the fifth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

And f123/f is 1.53, wherein f is the effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens and the third lens.

And l R9/R6 l is 2.85, wherein R6 is the radius of curvature of the image-side surface of the third lens, and R9 is the radius of curvature of the object-side surface of the fifth lens.

f1/R1 is 2.04, where f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object-side surface of the first lens.

T45/T23 is 1.34, where T23 is an air space on the optical axis of the second lens and the third lens, and T45 is an air space on the optical axis of the fourth lens and the fifth lens.

DT52/DT51 is 1.17, where DT51 is the maximum effective radius of the object-side surface of the fifth lens and DT52 is the maximum effective radius of the image-side surface of the fifth lens.

The Semi-FOV is 41.2 °, where Semi-FOV is half of the maximum field angle of the optical imaging system.

In example 2, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 6 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

5.2197E-04

-3.7723E-04

-2.7621E-04

-2.2269E-04

-1.7791E-04

-1.1877E-04

-7.1824E-05

S2

-8.7612E-02

-5.0682E-03

1.9847E-03

-1.0008E-04

-5.5779E-04

-2.6311E-04

-1.0777E-04

S3

-1.3734E-01

9.7305E-03

7.0881E-03

-1.3643E-03

-2.8140E-03

-1.4545E-04

6.3410E-04

S4

-6.2497E-02

2.6293E-02

-1.4692E-03

1.2607E-03

1.9616E-04

-5.8037E-04

2.9088E-04

S5

-1.8531E-01

2.4606E-02

-3.3809E-03

-4.6915E-03

1.6800E-03

-7.8426E-04

2.1841E-05

S6

-2.7362E-01

3.7030E-02

-1.0469E-02

-1.6605E-04

-1.1022E-04

5.9928E-04

-4.7868E-04

S7

-2.6028E-01

4.9499E-02

-8.2717E-02

4.0384E-02

-1.4835E-02

1.1512E-02

-6.0079E-03

S8

-1.7032E-01

2.9282E-01

-1.8962E-01

7.5780E-02

-2.2879E-02

7.7949E-03

-6.2149E-03

S9

-1.2437E+00

4.7879E-01

-1.8289E-01

-3.3377E-02

3.9521E-02

-4.5645E-02

1.6852E-02

S10

1.1167E-01

-4.2055E-01

2.8353E-01

-1.5676E-01

1.2284E-01

-8.8274E-02

5.8634E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.0699E-05

-8.1318E-06

0.0000E+00

S2

-1.4858E-05

0.0000E+00

S3

2.6812E-04

1.3764E-04

0.0000E+00

S4

-1.6745E-04

1.2008E-05

0.0000E+00

S5

6.2127E-05

-2.9174E-05

-5.1155E-06

1.2651E-05

8.2457E-07

0.0000E+00

S6

5.4355E-04

-1.5557E-04

0.0000E+00

S7

3.2299E-03

-1.9043E-03

8.1158E-04

8.2805E-04

6.4774E-04

4.8049E-04

4.9938E-05

S8

5.2237E-03

-1.7305E-03

-7.4235E-04

2.5774E-04

5.6144E-04

-3.9160E-04

7.2834E-05

S9

-2.1394E-02

7.4588E-03

-2.8627E-03

-7.9348E-04

0.0000E+00

S10

-3.3590E-02

2.1961E-02

-1.2299E-02

7.3703E-03

-4.4923E-03

1.5121E-03

-1.8766E-03

TABLE 6

Fig. 5 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. As can be seen from fig. 5 to 6, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Specific example 3

Fig. 7 is a schematic view of a lens assembly according to embodiment 3 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.

As shown in table 7, the basic parameter table of the optical imaging lens of embodiment 3 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

TABLE 7

As shown in table 8, in embodiment 3, the total effective focal length f of the optical imaging lens is 3.55mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 4.62mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 3.37 mm. Half of the maximum field angle Semi-FOV of the optical imaging lens is 38.1 °. The maximum effective radius DT51 of the object-side surface of the fifth lens is 1.98 mm.

TABLE 8

The optical imaging lens in embodiment 3 satisfies:

T12/T34 is 1.01, where T12 is an air space on the optical axis of the first lens and the second lens, and T34 is an air space on the optical axis of the third lens and the fourth lens.

f12/f is 0.91, wherein f is the effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens.

And f/EPD is 2.60, wherein f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

And | f45/R8| -1.18, wherein f45 is the combined focal length of the fourth lens and the fifth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

And f123/f is 0.99, wherein f is the effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens and the third lens.

L R9/R6| ═ 1.31, where R6 is the radius of curvature of the image-side surface of the third lens and R9 is the radius of curvature of the object-side surface of the fifth lens.

f1/R1 is 2.00, where f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object-side surface of the first lens.

T45/T23 is 1.31, where T23 is an air space on the optical axis of the second lens and the third lens, and T45 is an air space on the optical axis of the fourth lens and the fifth lens.

And the TTL/ImgH is 1.37, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and the ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

DT52/DT51 is 1.34, where DT51 is the maximum effective radius of the object-side surface of the fifth lens and DT52 is the maximum effective radius of the image-side surface of the fifth lens.

ImgH is 3.37mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane.

In example 3, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric, and table 9 shows the high-order term coefficients a usable for the aspheric mirror surfaces S1 to S14 in example 3₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.9430E-03

-8.7418E-04

-6.7267E-04

-5.2164E-04

-3.8040E-04

-2.3494E-04

-1.2308E-04

S2

-8.0488E-02

3.5666E-03

2.6378E-03

1.7109E-04

-4.2647E-04

-2.0267E-04

6.5744E-06

S3

-8.6738E-02

3.6704E-02

-3.6069E-03

3.0082E-04

-9.8268E-04

-4.0351E-04

-1.4472E-05

S4

-2.6248E-02

3.4022E-02

-3.7876E-03

7.3214E-04

7.0302E-05

-1.3213E-04

-1.5155E-04

S5

-1.0660E-01

-1.9191E-02

-2.4385E-03

-1.5820E-03

1.2130E-03

5.5107E-04

2.9169E-04

S6

-1.9349E-02

-3.1214E-02

1.0969E-02

-5.3436E-03

1.7669E-03

1.0912E-04

-2.7670E-04

S7

-1.6978E-01

-5.1604E-02

-7.0642E-04

-3.0496E-03

1.0482E-02

9.3961E-04

-7.3097E-06

S8

-4.0053E-01

1.3742E-01

-4.7485E-02

-5.9715E-03

1.2536E-02

-8.2729E-03

4.1679E-03

S9

-9.5316E-01

3.8425E-01

-1.6352E-01

3.5018E-03

4.2600E-02

-3.1813E-02

1.7951E-02

S10

-4.3376E-01

-1.1220E-01

1.2643E-01

-7.9905E-02

5.8451E-02

-4.2512E-02

2.7419E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-4.8822E-05

-1.3104E-05

0.0000E+00

S2

1.0841E-05

0.0000E+00

S3

4.1584E-05

-1.8834E-05

0.0000E+00

S4

-1.2641E-05

-2.5058E-05

0.0000E+00

S5

2.1411E-04

6.8604E-05

4.8916E-05

1.9017E-05

3.7490E-06

0.0000E+00

S6

2.1803E-04

-5.4781E-05

0.0000E+00

S7

-3.8623E-04

-8.5978E-04

-5.7649E-04

1.1898E-04

1.5132E-04

1.2459E-04

5.7151E-05

S8

-1.6128E-03

8.6763E-04

-1.0051E-03

6.3506E-04

-1.1777E-04

-2.4136E-06

-2.2480E-05

S9

-9.4576E-03

7.0970E-03

-4.0206E-03

1.1431E-03

0.0000E+00

S10

-1.7139E-02

9.9789E-03

-5.8294E-03

3.5267E-03

-1.9764E-03

1.1732E-03

-3.9684E-04

TABLE 9

Fig. 8 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 9 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. As can be seen from fig. 8 to 9, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Specific example 4

Fig. 10 is a schematic view of a lens assembly according to embodiment 4 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex 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. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.

As shown in table 10, the basic parameter table of the optical imaging lens of embodiment 4 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 10

As shown in table 11, in embodiment 4, the total effective focal length f of the optical imaging lens is 3.65mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 4.59mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 3.38 mm. Half of the maximum field angle Semi-FOV of the optical imaging lens is 37.8 °. The maximum effective radius DT51 of the object-side surface of the fifth lens is 2.16 mm.

TABLE 11

The optical imaging lens in embodiment 4 satisfies:

T12/T34 is 1.08, where T12 is an air space on the optical axis of the first lens and the second lens, and T34 is an air space on the optical axis of the third lens and the fourth lens.

f12/f is 1.17, where f is the effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens.

And | f45/R8| -4.59, wherein f45 is the combined focal length of the fourth lens and the fifth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

And f123/f is 1.62, wherein f is the effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens and the third lens.

And l R9/R6 l is 1.78, wherein R6 is the radius of curvature of the image-side surface of the third lens, and R9 is the radius of curvature of the object-side surface of the fifth lens.

f1/R1 is 1.86, where f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object-side surface of the first lens.

T45/T23 is 2.79, where T23 is the air space on the optical axis of the second lens and the third lens, and T45 is the air space on the optical axis of the fourth lens and the fifth lens.

And the TTL/ImgH is 1.36, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and the ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

DT52/DT51 is 1.26, where DT51 is the maximum effective radius of the object-side surface of the fifth lens and DT52 is the maximum effective radius of the image-side surface of the fifth lens.

The Semi-FOV is 37.8 °, where the Semi-FOV is half of the maximum field angle of the optical imaging system.

In example 4, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 12 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 4₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

TABLE 12

Fig. 11 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. As can be seen from fig. 11 to 12, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Specific example 5

Fig. 13 is a schematic view of a lens assembly according to embodiment 5 of the present invention, wherein the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave 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 convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane S13.

As shown in table 13, the basic parameter table of the optical imaging lens of example 5 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 13

As shown in table 14, in embodiment 5, the total effective focal length f of the optical imaging lens is 3.33mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 4.45mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 3.38 mm. Half of the maximum field angle Semi-FOV of the optical imaging lens is 41.1 °. The maximum effective radius DT51 of the object-side surface of the fifth lens is 2.40 mm.

TABLE 14

The optical imaging lens in embodiment 5 satisfies:

T12/T34 is 1.04, where T12 is an air space on the optical axis of the first lens and the second lens, and T34 is an air space on the optical axis of the third lens and the fourth lens.

f12/f is 1.33, where f is the effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens.

And f/EPD is 2.45, wherein f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

And | f45/R8| -4.31, wherein f45 is the combined focal length of the fourth lens and the fifth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

And f123/f is 1.93, wherein f is the effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens and the third lens.

And | R9/R6| -5.52, wherein R6 is the radius of curvature of the image-side surface of the third lens, and R9 is the radius of curvature of the object-side surface of the fifth lens.

T45/T23 is 3.56, where T23 is the air space on the optical axis of the second lens and the third lens, and T45 is the air space on the optical axis of the fourth lens and the fifth lens.

And the TTL/ImgH is 1.32, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and the ImgH is half of the diagonal length of the effective pixel area on the imaging surface.

DT52/DT51 is 1.23, where DT51 is the maximum effective radius of the object-side surface of the fifth lens and DT52 is the maximum effective radius of the image-side surface of the fifth lens.

The Semi-FOV is 41.1 °, where Semi-FOV is half of the maximum field angle of the optical imaging system.

In example 5, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 15 shows the high-order term coefficients a that can be used for the aspheric mirror surfaces S1 through S14 in example 5₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.5967E-03

-9.5603E-05

-1.5151E-05

1.4539E-06

-1.8396E-06

-4.1855E-07

-9.4593E-07

S2

-5.8063E-02

-7.5962E-04

1.0170E-03

2.5856E-04

-2.3781E-05

9.6803E-06

-9.4106E-06

S3

-7.1253E-02

5.4631E-03

2.1661E-03

6.5227E-04

-2.2949E-04

2.9951E-05

-4.5802E-05

S4

-4.9784E-02

1.2219E-02

-1.4249E-03

1.2495E-03

-4.1257E-04

2.3091E-04

-1.4513E-04

S5

-1.3923E-01

1.1741E-02

-8.1927E-03

3.7437E-04

-1.0005E-03

3.8045E-05

-1.4777E-04

S6

-2.3462E-01

3.1192E-02

-1.2028E-02

3.2978E-03

-2.7252E-03

1.6535E-03

-2.4825E-04

S7

-8.7890E-02

1.9782E-02

-7.3488E-03

5.2466E-03

-4.6479E-03

1.4304E-03

-1.0383E-03

S8

4.3191E-01

-1.5177E-02

1.0087E-03

1.4206E-03

-2.0308E-03

-1.9745E-05

-3.4328E-04

S9

-1.0819E+00

3.9678E-01

-8.3346E-02

7.3246E-04

2.3911E-03

-1.1674E-03

1.4741E-03

S10

-3.6788E+00

7.1095E-01

-1.9906E-01

8.0774E-02

-2.3379E-02

7.1458E-03

-1.5818E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

1.4871E-06

1.0715E-06

0.0000E+00

S2

-8.2636E-07

0.0000E+00

S3

-1.4028E-05

-1.7358E-05

0.0000E+00

S4

-4.0962E-05

-5.4462E-05

0.0000E+00

S5

2.9342E-05

5.1458E-06

1.0865E-05

4.4887E-06

5.0589E-06

0.0000E+00

S6

5.4684E-04

3.5855E-05

0.0000E+00

S7

2.3793E-04

9.1111E-05

-6.7893E-05

4.4500E-06

-1.8935E-06

1.4467E-05

-3.8094E-06

S8

-7.5354E-05

2.3927E-04

-1.2733E-06

-3.5525E-05

-1.8195E-05

2.7581E-05

-8.0822E-06

S9

-9.9053E-04

3.5899E-04

-1.7773E-04

6.3044E-05

0.0000E+00

S10

-1.0547E-03

8.8319E-05

-7.8120E-04

5.6226E-04

-3.0126E-04

4.1153E-04

-2.8236E-04

Watch 15

Fig. 14 shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 5, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 15 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. As can be seen from fig. 14 to 15, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

The above is merely a preferred embodiment of the present invention, and the present invention is not limited thereto, and any modification, improvement, equivalent replacement, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a diaphragm;

a first lens having an optical power;

a second lens having a negative refractive power, the object side surface of which is concave;

a third lens having a negative optical power;

a fourth lens having an optical power;

a fifth lens having a refractive power, an object-side surface of which is convex;

wherein an air interval T12 of the first lens and the second lens on an optical axis and an air interval T34 of the third lens and the fourth lens on an optical axis satisfy: 1.0 < T12/T34 < 1.5.

2. The optical imaging lens according to claim 1, characterized in that: the effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens meet the following conditions: f12/f is more than 0.8 and less than 1.6.

3. The optical imaging lens according to claim 1, characterized in that: the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD is less than or equal to 2.6.

4. The optical imaging lens according to claim 1, characterized in that: a combined focal length f45 of the fourth lens and the fifth lens and a radius of curvature R8 of an image side surface of the fourth lens satisfy: 1.0 < | f45/R8| < 7.5.

5. The optical imaging lens according to claim 1, characterized in that: the effective focal length f of the optical imaging lens and the combined focal length f123 of the first lens, the second lens and the third lens satisfy that: f123/f is more than 0.9 and less than 2.0.

6. The optical imaging lens according to claim 1, characterized in that: a radius of curvature R6 of the third lens image-side surface and a radius of curvature R9 of the fifth lens object-side surface satisfy: 1.0 < | R9/R6| < 5.8.

7. The optical imaging lens according to claim 1, characterized in that: an effective focal length f1 of the first lens and a radius of curvature R1 of the object side of the first lens satisfy: f1/R1 is more than 1.5 and less than 2.5.

8. The optical imaging lens according to claim 1, characterized in that: an air interval T23 of the second lens and the third lens on the optical axis and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 1.0 < T45/T23 < 3.6.

9. The optical imaging lens according to claim 1, characterized in that: the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH is less than 1.4.

10. The optical imaging lens according to claim 1, characterized in that: the maximum effective radius DT51 of the object side surface of the fifth lens and the maximum effective radius DT52 of the image side surface of the fifth lens meet the following conditions: 1.0 < DT52/DT51 < 1.5.

11. The optical imaging lens according to claim 1, characterized in that: the refractive index N3 of the third lens and the refractive index N5 of the fifth lens satisfy: N3/N5 is more than 1.0 and less than 1.5.

12. The optical imaging lens according to claim 1, characterized in that: the second lens and the third lens are made of the same material, and the refractive index is larger than 1.6.

13. The optical imaging lens according to claim 1, characterized in that: half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: 35 < Semi-FOV < 45.

14. The optical imaging lens according to claim 1, characterized in that: the half ImgH of the diagonal length of the effective pixel area on the imaging plane satisfies: ImgH > 3.0 mm.