CN214174725U - Optical imaging lens - Google Patents

Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: a first lens having a positive optical power; an auto-focus assembly; the image side surface of the second lens is a concave surface; a third lens with focal power, wherein the image side surface of the third lens is convex; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and at least one subsequent lens having an optical power; the radius of curvature of the object side of the autofocus assembly is variable. At least one mirror surface from the object side surface of the first lens to the image side surface of the lens closest to the image side is an aspherical mirror surface.

Description

Optical imaging lens

Technical Field

The application relates to the field of optical elements, in particular to an optical imaging lens.

Background

With the progress of science and technology, smart phones have become indispensable application devices in people's daily life, and particularly, the photographing function of smart phones plays an increasingly important role in people's daily life. Meanwhile, with the trend of miniaturization of smart phones, users are pursuing the imaging performance of optical imaging lenses mounted on smart phones and also desire to have thinner and lighter shapes.

At present, in order to improve the imaging performance of the optical imaging lens in the market, a mechanical zooming mode is mostly adopted to meet the requirement that the optical imaging lens has a better imaging effect under different shooting scenes. However, the optical imaging lens with mechanical zooming function has a large volume, is not easy to be installed in a mobile phone, and the magnet and the coil thereof can generate certain interference to the image quality.

SUMMERY OF THE UTILITY MODEL

An 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 positive optical power; an auto-focus assembly; the image side surface of the second lens is a concave surface; a third lens with focal power, wherein the image side surface of the third lens is convex; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and at least one subsequent lens having an optical power. The radius of curvature of the object side of the autofocus assembly is variable. At least one mirror surface from the object side surface of the first lens to the image side surface of the lens closest to the image side is an aspherical mirror surface.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 1.0 < | f/R10| < 5.5.

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: f1/R1 is more than 1.5 and less than 2.5.

In one embodiment, the radius of curvature R6 of the image-side surface of the third lens and the effective focal length f3 of the third lens may satisfy: 0.5 < | R6/f3| < 2.5.

In one embodiment, the effective focal length f4 of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: -3.0 < f4/R8 < -2.0.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness D of the auto-focus assembly on the optical axis may satisfy: CT1/D is more than 1.0 and less than 2.0.

In one embodiment, the center thickness D of the autofocus assembly on the optical axis is separated from the distance T between the first lens and the autofocus assembly on the optical axis_1-TCan satisfy the following conditions: D/T is more than 1.5_1-T＜6.0。

In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the separation distance T34 of the third lens and the fourth lens on the optical axis may satisfy: T34/CT5 is more than 1.0 and less than 3.5.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 2.0 < CT4/CT2 < 5.0.

In one embodiment, half of the maximum field angle Semi-FOV of the optical imaging lens may satisfy: Semi-FOV > 25.

In one embodiment, a distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens on an optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens may satisfy: TTL/ImgH is more than 1.5 and less than 2.1.

In one embodiment, the auto-focus assembly sequentially comprises, from the first lens to the second lens along the optical axis: the device comprises a flexible film, a liquid material and a light transmission module, wherein the flexible film is arranged on the object side surface of the liquid material; and the image side surface of the liquid material is glued with the light-transmitting module.

The optical imaging lens is applicable to portable electronic products, and has the advantages of stable image quality, automatic focusing, ultra-thinness, miniaturization and good imaging quality.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments with reference to the attached drawings in which:

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. 3A and 3B show a focus shift graph and a Modulation Transfer Function (MTF) graph in a wavelength band range of 470nm to 650nm, respectively, when the optical imaging lens is 350mm away from the subject in embodiment 1;

FIGS. 4A and 4B are graphs showing a focal shift and an MTF in a wavelength range of 470nm to 650nm, respectively, when the optical imaging lens is 150mm away from the subject in embodiment 1;

fig. 5A and 5B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, when the optical imaging lens is at infinity from a subject in embodiment 1;

fig. 6 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;

fig. 7A to 7D 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. 8A and FIG. 8B are graphs showing the focus shift and MTF in the wavelength range of 470nm to 650nm, respectively, in embodiment 2 when the optical imaging lens is at a distance of 350mm from the subject;

FIGS. 9A and 9B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, at a distance of 150mm from a subject in the optical imaging lens according to embodiment 2;

fig. 10A and 10B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, when the optical imaging lens is at infinity from the object in embodiment 2;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

fig. 12A to 12D 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;

FIGS. 13A and 13B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, in embodiment 3, when the optical imaging lens is at a distance of 350mm from the subject;

FIGS. 14A and 14B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, at a distance of 150mm from a subject in the optical imaging lens according to embodiment 3;

fig. 15A and 15B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, at infinity from a subject in the optical imaging lens according to embodiment 3;

fig. 16 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 17A to 17D 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 4;

FIGS. 18A and 18B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, in embodiment 4, when the optical imaging lens is at a distance of 350mm from the subject;

FIGS. 19A and 19B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, at a distance of 150mm from a subject in the optical imaging lens according to embodiment 4;

fig. 20A and 20B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, when the optical imaging lens is at infinity from the object in embodiment 4;

fig. 21 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;

fig. 22A to 22D 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 5;

FIGS. 23A and 23B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, in embodiment 5, when the optical imaging lens is at a distance of 350mm from the subject;

FIGS. 24A and 24B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, at a distance of 150mm from a subject in the optical imaging lens according to embodiment 5;

fig. 25A and 25B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, at infinity from a subject in the optical imaging lens according to embodiment 5;

fig. 26 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

fig. 27A to 27D 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 6;

FIG. 28A and FIG. 28B are graphs showing the focus shift and MTF in the wavelength band range of 470nm to 650nm, respectively, in embodiment 6 with the optical imaging lens at 350mm from the subject;

FIGS. 29A and 29B are graphs showing a focus shift curve and an MTF curve in a wavelength band of 470nm to 650nm, respectively, at a distance of 150mm from a subject in the optical imaging lens according to embodiment 6;

fig. 30A and 30B show a focus shift graph and an MTF graph in a wavelength band range of 470nm to 650nm, respectively, at infinity from a subject in the optical imaging lens according to embodiment 6; and

fig. 31A and 31B respectively show structural schematic diagrams of an auto-focusing assembly when the optical imaging lens in the present application is at different distances from a subject.

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.

An optical imaging lens according to an exemplary embodiment of the present application may include an auto-focus assembly and at least five lenses having optical power. The at least five lenses with optical power are respectively a first lens, a second lens, a third lens, a fourth lens and at least one subsequent lens. The first lens element, the auto-focus assembly, the second lens element, the third lens element, the fourth lens element and the at least one subsequent lens element are sequentially arranged along an optical axis from an object side to an image side. The first lens and the auto-focus component may have a separation distance therebetween. The auto focus assembly and the second lens may have a separation distance therebetween. Any two adjacent lenses from the second lens to the lens closest to the image side can have a spacing distance.

According to an exemplary embodiment of the present application, the auto-focusing assembly may sequentially include a bendable film, a liquid material, and a light-transmitting module from the first lens to the second lens along the optical axis. The pliable membrane may be disposed on the object side of the liquid material. The light transmissive module and the image side of the liquid material may be glued together, wherein the light transmissive module may be a planar glass plate.

According to an exemplary embodiment of the present application, the radius of curvature of the object side of the autofocus assembly is variable, i.e., the shape of the bendable membrane and the object side of the liquid material are variable. The curvature radius of the object side surface of the automatic focusing assembly can be changed according to the change of the distance from the optical imaging lens to the shot object, so that the automatic focusing function of the optical imaging lens is realized.

According to an exemplary embodiment of the present application, an autofocus assembly includes a bendable membrane, a liquid material, and a light transmissive module. Fig. 31A shows a schematic structural diagram of an autofocus assembly of the present application. The automatic focusing assembly comprises a bendable film T1, a liquid material T2 and a light transmission module T3, wherein the bendable film T1 and the liquid material T2 are both of a planar structure. Fig. 31B shows a schematic structural diagram of another autofocus assembly of the present application. The autofocus assembly includes a pliable membrane T1 ', a liquid material T2 ', and a light transmissive module T3 ', wherein object sides of the pliable membrane T1 ' and the liquid material T2 ' are deformed. Specifically, the liquid material T2 'may be disposed between the bendable film T1' and the light transmission module T3 ', and the liquid material T2' may be connected with a conductive material (not shown). When voltage is applied to the conductive material from the outside, the object side surface of the liquid material T2 'is deformed, and the flexible film T1' is driven to deform, so that the focal length of the auto-focusing assembly is changed, and therefore the auto-focusing function of the lens at different object distances can be realized without changing the total length of the optical imaging lens, and the optical imaging lens becomes thinner. It should be understood that the liquid material in the present application is not limited to include only one material, and in actual production, in order to reasonably adjust the total effective focal length of the optical imaging lens, a plurality of liquid materials, such as a first liquid material, a second liquid material, etc., may be disposed between the flexible film and the light-transmitting module according to specific needs. The first liquid material and the second liquid material are immiscible with each other. When voltage is applied to the conductive material, the liquid material can be deformed, and then the contact surface shapes of the flexible film and the first liquid material and the second liquid material are driven to change, so that the focal length of the automatic focusing assembly is changed, and the total effective focal length of the optical imaging lens can be adjusted.

According to exemplary embodiments of the present application, a voltage may be applied to the conductive material using a driving system such as a voice coil motor, a micro electro mechanical system, a piezoelectric system, and a memory metal. The driving system can adjust the focal length of the optical imaging lens to enable the optical imaging lens to have a better imaging position, so that the optical imaging lens can clearly image when the optical imaging lens is different distances away from a shot object.

In an exemplary embodiment, the first lens may have a positive optical power; the second lens can have negative focal power, and the image side surface of the second lens can be concave; the third lens can have positive focal power or negative focal power, and the image side surface of the third lens can be a convex surface; the fourth lens can have positive focal power or negative focal power, the object side surface of the fourth lens can be a concave surface, and the image side surface of the fourth lens can be a convex surface; and at least one subsequent lens may have a positive or negative optical power. Through the reasonable distribution of focal power and surface characteristics of each lens, the integral aberration of the lens is favorably reduced, and the imaging quality is improved. Particularly, the image side surface of the second lens is set to be a concave surface, and the image side surface of the third lens is set to be a convex surface, so that the spherical aberration of the whole lens can be effectively reduced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < | f/R10| < 5.5, where f is the total effective focal length of the optical imaging lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. Satisfying 1.0 < | f/R10| < 5.5, the total effective focal length of the lens can be reasonably distributed, and the integral third-order astigmatism of the lens can be controlled within a reasonable range, which is beneficial to improving the imaging quality of the off-axis field of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < f1/R1 < 2.5, 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. More specifically, f1 and R1 may further satisfy: 1.6 < f1/R1 < 2.4. Satisfying 1.5 < f1/R1 < 2.5, the deflection angle of the fringe field of view in the first lens can be controlled, and the sensitivity of the lens can be effectively reduced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < | R6/f3| < 2.5, where R6 is the radius of curvature of the image-side surface of the third lens and f3 is the effective focal length of the third lens. More specifically, R6 and f3 may further satisfy: 0.5 < | R6/f3| < 2.3. Satisfy 0.5 < | R6/f3| < 2.5, can effectively control the focal power of third lens to control the spherical aberration of third lens, make the camera lens have good image quality on the axle.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -3.0 < f4/R8 < -2.0, wherein f4 is the effective focal length of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens. More specifically, f4 and R8 may further satisfy: -2.8 < f4/R8 < -2.0. Satisfying f4/R8 of-3.0 and less than-2.0, the third-order coma aberration of the fourth lens can be controlled within a reasonable range, and the third-order coma aberration amount generated by the front lens can be balanced, so that the lens has good imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < CT1/D < 2.0, where CT1 is the central thickness of the first lens on the optical axis and D is the central thickness of the auto-focus assembly on the optical axis. More specifically, CT1 and D further satisfy: CT1/D is more than 1.0 and less than 1.7. The requirements of 1.0 < CT1/D < 2.0 can effectively ensure the processing manufacturability of the first lens and the automatic focusing assembly, so that the first lens and the automatic focusing assembly are more suitable for the molding characteristic of plastic lenses, and the stability of production and assembly is realized.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: D/T is more than 1.5_1-T< 6.0, where D is the center thickness of the autofocus assembly on the optical axis, T_1-TIs the separation distance between the first lens and the autofocus assembly on the optical axis. More specifically, D and T_1-TFurther, the following conditions can be met: D/T is more than 1.6_1-TIs less than 5.9. Satisfies the D/T ratio of 1.5_1-TLess than 6.0, which is beneficial to ensuring that the automatic focusing component has enough space to adjust the curvature of the automatic focusing component, thereby realizing the automatic focusing function of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < T34/CT5 < 3.5, wherein CT5 is the central thickness of the fifth lens on the optical axis, and T34 is the separation distance between the third lens and the fourth lens on the optical axis. More specifically, T34 and CT5 further satisfy: 1.3 < T34/CT5 < 3.5. The requirements that T34/CT5 is more than 1.0 and less than 3.5 are met, the uniform distribution of the sizes of all lenses is facilitated, the assembly stability of the lens is favorably ensured, the integral aberration of the lens is favorably reduced, and the total length of the imaging lens is shortened.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < CT4/CT2 < 5.0, wherein CT4 is the central thickness of the fourth lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. More specifically, CT4 and CT2 further satisfy: 2.3 < CT4/CT2 < 5.0. The requirement that CT4/CT2 is more than 2.0 and less than 5.0 is met, the distortion contribution amount of each field of view of the optical imaging lens is favorably controlled within a reasonable range, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: the Semi-FOV is more than 25 degrees, wherein the Semi-FOV is half of the maximum field angle of the optical imaging lens. More specifically, the Semi-FOV further satisfies: Semi-FOV > 27. The Semi-FOV is more than 25 degrees, the optical imaging lens can obtain a larger field range, and the capturing capability of the optical imaging lens on object information is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < TTL/Imgh < 2.1, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and Imgh is half of the length of the diagonal line of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH may further satisfy: TTL/ImgH is more than 1.7 and less than 2.1. The TTL/ImgH is more than 1.5 and less than 2.1, the total length of the lens can be reduced as much as possible while the large image plane is ensured, and the optical imaging lens is ensured to have an ultrathin effect.

In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter and/or a protective glass for protecting the photosensitive element on the imaging surface. The application provides an optical imaging lens with the characteristics of miniaturization, ultra-thinness, automatic focusing, stable image quality, high imaging quality and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, at least five lenses above. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the processability of an imaging system is improved, and the optical imaging lens is more beneficial to production and processing.

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 and the image-side surface of the lens closest to the image side 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 the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the at least one subsequent lens is an aspheric mirror surface. Optionally, the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the at least one subsequent lens 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 five or six lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five or six 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 5B. 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 includes, in order from an object side to an image side: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible membrane, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 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 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 surface S13.

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 this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object side surface of the auto focus assembly T (i.e., the object side surface of the bendable film and the object side surface of the liquid material) is a plane, and the radius of curvature RT is infinite. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 113.3000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-149.3000.

In the present example, the total effective focal length f of the optical imaging lens is 4.41mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface of the first lens E1 to the imaging surface S13 of the optical imaging lens) is 5.22mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum angle of view of the optical imaging lens is 30.8 °, and the aperture value Fno of the optical imaging lens is 2.48.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 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 coefficient A of each of the aspherical mirror surfaces S1 to S10 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3089E-02

-2.7990E-03

-7.1141E-04

-1.4275E-04

-6.1907E-05

-1.3867E-05

-1.3420E-05

4.2484E-06

5.6667E-06

S2

-1.3369E-02

-2.4340E-03

-3.5705E-04

-3.9589E-05

1.6406E-05

-1.6993E-06

-3.6749E-06

-1.5856E-05

-1.4392E-05

S3

6.4401E-02

-3.3983E-03

3.3118E-04

-1.8862E-06

-1.7211E-05

1.1256E-05

-6.1193E-06

3.8999E-06

-3.5295E-06

S4

7.2645E-02

-1.3253E-03

5.1880E-04

6.1225E-05

2.2677E-06

3.7380E-06

4.1329E-06

-5.7406E-07

1.3695E-06

S5

-1.7764E-01

-4.8914E-03

6.1061E-04

1.2512E-03

4.3865E-04

8.8331E-05

-8.2530E-05

-1.6720E-04

-1.7408E-04

S6

-2.1906E-01

2.5607E-03

5.1107E-03

1.7362E-03

9.7586E-05

-7.3711E-05

2.6148E-05

5.6350E-05

5.9989E-05

S7

1.6337E-01

3.6633E-02

1.9395E-03

-2.2001E-03

-3.0904E-04

-4.8554E-04

5.8402E-04

-3.4852E-04

7.6033E-05

S8

1.0312E+00

-6.2618E-02

-1.7775E-03

6.3172E-04

4.3076E-03

-4.4127E-03

1.8752E-03

-6.4955E-04

4.2654E-04

S9

-1.5950E+00

5.3580E-01

-2.2167E-01

7.6890E-02

-2.3302E-02

6.4064E-03

-3.5760E-03

1.0625E-03

4.4792E-04

S10

-3.5675E+00

8.5467E-01

-2.5371E-01

1.0023E-01

-4.7411E-02

1.9792E-02

-9.4283E-03

5.0597E-03

-1.7163E-03

TABLE 2

Fig. 2A 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. 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. Fig. 3A, 4A and 5A show the focal shift graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm and infinity from the object in embodiment 1, which represent the pixel sizes in the meridional field and the sagittal field at different focal shift amounts (i.e., the difference between the actual focal length and the theoretical focal length). Fig. 3B, 4B, and 5B show MTF graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the object in embodiment 1, respectively, which represent pixel sizes in the meridional field and the sagittal field at different frequencies. As can be seen from fig. 2A to 5B, 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. 6 to 10B. 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. 6 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 6, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible membrane, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane 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 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 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 surface S13.

In this example, the total effective focal length f of the optical imaging lens is 4.98mm, the total length TTL of the optical imaging lens is 5.63mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S13 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 27.9 °, and the aperture value Fno of the optical imaging lens is 2.48.

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

In this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object-side surface of the auto-focusing assembly T is a plane, and the radius of curvature RT is infinity. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 125.5000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-169.6000.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-9.7453E-03

-2.4753E-03

-6.2225E-04

-1.3737E-04

-3.0070E-05

-5.4903E-06

-1.6100E-06

-5.1850E-07

-4.8846E-07

S2

-9.7204E-03

-2.1131E-03

-4.0298E-04

-5.6358E-05

-1.0443E-05

-6.9243E-07

-5.5829E-07

-1.2332E-07

-2.9363E-07

S3

6.4689E-02

-2.8664E-03

3.9804E-04

8.7333E-06

-6.7431E-06

7.1639E-06

-4.6286E-06

3.0560E-06

-3.1677E-06

S4

6.8458E-02

-1.0146E-03

7.9526E-04

1.7567E-04

4.2620E-05

1.9896E-05

1.2773E-06

3.5548E-06

-1.3858E-06

S5

-1.8075E-01

-5.1158E-03

8.8748E-04

1.3995E-03

6.9895E-04

2.8484E-04

8.2004E-05

7.7102E-06

-1.4416E-05

S6

-2.1837E-01

9.7412E-03

4.3518E-03

1.7641E-03

5.0003E-04

2.9464E-05

-5.3580E-05

-5.6784E-05

-3.2892E-05

S7

1.6834E-01

4.9418E-02

-1.5696E-02

1.5549E-03

2.3354E-03

-1.2231E-03

6.1945E-04

-1.3205E-04

-1.9262E-04

S8

1.0024E+00

-5.8139E-02

-3.7046E-03

-3.3188E-03

8.6422E-03

-3.8805E-03

1.7015E-03

-1.2727E-03

-4.2896E-04

S9

-1.6255E+00

5.2620E-01

-2.0054E-01

5.5938E-02

-2.2406E-02

1.1085E-02

-5.7368E-03

-5.3883E-04

1.9621E-04

S10

-3.4877E+00

8.6193E-01

-2.6167E-01

9.9902E-02

-5.1081E-02

2.2298E-02

-1.0245E-02

4.8516E-03

-2.9107E-03

TABLE 4

Fig. 7A 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. 7B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 7C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 7D 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. Fig. 8A, 9A and 10A show the focal shift graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm and infinity from the object in embodiment 2, respectively, which represent the pixel sizes in the meridional field and the sagittal field at different focal shifts. Fig. 8B, 9B, and 10B show MTF graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the object of photographing in embodiment 2, respectively, which represent pixel sizes in the meridional field of view and the sagittal field of view at different frequencies. As can be seen from fig. 7A to 10B, 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. 11 to 15B. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible membrane, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane 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 convex 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 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 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 surface S13.

In this example, the total effective focal length f of the optical imaging lens is 4.05mm, the total length TTL of the optical imaging lens is 5.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S13 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 33.6 °, and the aperture value Fno of the optical imaging lens is 2.48.

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 high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

In this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object-side surface of the auto-focusing assembly T is a plane, and the radius of curvature RT is infinity. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 129.0000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-174.5000.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.1693E-02

-8.3297E-03

-2.0812E-03

3.2635E-04

6.2454E-04

4.0692E-04

8.3089E-05

-8.8380E-05

-1.5194E-04

S2

-2.4967E-02

-1.4279E-02

4.7525E-03

3.0801E-03

1.4633E-05

-1.3760E-03

-1.0180E-03

-9.0483E-05

5.4615E-04

S3

4.0927E-02

5.4654E-04

1.5137E-03

2.6683E-04

-5.7743E-05

-6.4331E-05

-9.2145E-05

-5.2253E-05

-4.4442E-05

S4

5.3757E-02

3.2615E-03

2.5805E-03

3.8463E-04

-6.7504E-05

-2.5329E-04

-2.2811E-04

-1.9126E-04

-1.1652E-04

S5

-8.6209E-02

-3.7804E-03

2.7890E-03

1.6606E-03

6.3767E-04

1.3733E-04

-1.3451E-04

-1.4348E-04

-1.0920E-04

S6

-9.7686E-02

5.2818E-03

3.3715E-03

2.1449E-05

3.5776E-04

2.3353E-04

1.0436E-04

1.9131E-05

5.0645E-06

S7

8.1815E-03

-6.2205E-04

3.1935E-04

-5.2323E-03

5.7815E-04

5.6653E-04

-1.8138E-04

-4.5486E-04

-1.1227E-04

S8

5.5389E-01

-2.9672E-02

1.6430E-03

-1.5810E-02

4.4420E-04

2.4200E-03

1.5207E-04

-1.5751E-03

-4.9761E-04

S9

-1.1122E+00

3.1803E-01

-9.8542E-02

1.9913E-02

-5.9251E-03

7.8938E-03

-2.8906E-03

-5.3600E-04

-3.0487E-04

S10

-3.2723E+00

6.7946E-01

-2.3471E-01

8.3168E-02

-4.0898E-02

1.9289E-02

-8.7001E-03

4.5177E-03

-1.9345E-03

TABLE 6

Fig. 12A 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. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 3, 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 3, which represents a deviation of different image heights on the imaging surface after light passes through the lens. Fig. 13A, 14A and 15A show graphs of the focal shift of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm and infinity from the object in embodiment 3, respectively, which show the pixel sizes in the meridional field and the sagittal field at different focal shifts. Fig. 13B, 14B, and 15B show MTF graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the subject in embodiment 3, respectively, which represent pixel sizes in the meridional field of view and the sagittal field of view at different frequencies. As can be seen from fig. 12A to 15B, 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. 16 to 20B. Fig. 16 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 16, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible film, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 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 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 convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 4.62mm, the total length TTL of the optical imaging lens is 5.41mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 29.7 °, and the aperture value Fno of the optical imaging lens is 2.48.

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

In this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object-side surface of the auto-focusing assembly T is a plane, and the radius of curvature RT is infinity. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 123.3000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-167.5000.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.2785E-02

-3.5185E-03

-9.1802E-04

-2.0817E-04

-4.7609E-05

-4.8811E-06

1.6199E-06

4.5448E-06

3.1353E-06

S2

-1.2284E-02

-2.9294E-03

-5.2041E-04

-1.4259E-05

6.2241E-05

6.9920E-05

6.2336E-05

5.0956E-05

3.8874E-05

S3

8.0409E-02

-4.3912E-03

5.7938E-04

-3.5760E-05

9.9696E-06

-2.2080E-06

7.4483E-07

7.8261E-07

-1.0329E-06

S4

7.9719E-02

-1.2855E-03

7.8020E-04

1.2068E-04

4.8272E-05

3.6570E-07

-4.5901E-07

-3.7852E-06

-3.8257E-06

S5

-1.5057E-01

-4.2410E-03

-2.1793E-04

4.4924E-04

2.4520E-04

7.2613E-05

1.3567E-05

-1.1648E-05

-1.4325E-05

S6

-1.9074E-01

-9.5293E-05

3.1198E-03

1.1703E-03

3.8791E-04

-5.5847E-05

-8.5775E-05

-8.7421E-05

-5.0369E-05

S7

9.2537E-02

2.1818E-02

5.4315E-05

1.4891E-04

1.0206E-03

-9.7635E-04

7.6973E-05

2.0574E-04

-6.3400E-06

S8

7.5366E-01

-3.8197E-02

-4.0152E-04

-5.1026E-03

5.4962E-03

-2.7736E-03

4.5252E-04

4.6355E-04

-9.7366E-05

S9

-9.7634E-03

5.6606E-04

-2.0665E-03

-9.6668E-05

2.4851E-04

5.7058E-04

-6.8155E-04

3.8964E-04

-3.0919E-04

S10

-2.4846E-02

1.9799E-03

1.2238E-03

3.7258E-05

3.5969E-04

-3.9137E-04

6.7683E-04

-1.8015E-04

4.5780E-04

S11

-1.1507E+00

3.4272E-01

-1.0337E-01

2.9304E-02

-8.8972E-03

2.1092E-03

-5.1524E-04

9.5667E-05

2.6046E-04

S12

-2.5934E+00

5.8471E-01

-1.7697E-01

6.7009E-02

-2.7755E-02

1.1802E-02

-5.5062E-03

2.4630E-03

-1.1066E-03

TABLE 8

Fig. 17A 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. 17B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 17C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 17D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging surface after light passes through the lens. Fig. 18A, 19A, and 20A show graphs of the focal shift of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the object in embodiment 4, respectively, which represent the pixel sizes in the meridional field of view and the sagittal field of view at different amounts of focal shift. Fig. 18B, 19B, and 20B show MTF graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the subject in embodiment 4, respectively, which represent pixel sizes in the meridional field of view and the sagittal field of view at different frequencies. As can be seen from fig. 17A to 20B, 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. 21 to 25B. Fig. 21 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible film, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 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 positive power, and has a convex object-side surface S9 and a convex 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. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 4.26mm, the total length TTL of the optical imaging lens is 5.50mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 32.0 °, and the aperture value Fno of the optical imaging lens is 2.59.

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

In this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object-side surface of the auto-focusing assembly T is a plane, and the radius of curvature RT is infinity. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 116.2000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-155.0000.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.4554E-02

-6.6215E-03

-1.3238E-03

4.5585E-05

3.5833E-05

-3.1565E-06

6.5104E-05

7.3253E-05

-2.0082E-05

S2

-1.5160E-02

-5.3883E-03

3.8541E-04

5.4088E-04

-2.3291E-05

-4.1322E-05

6.8137E-05

5.6352E-06

-1.5478E-04

S3

5.1595E-02

-5.6801E-03

6.2053E-04

-1.7117E-04

4.8919E-05

-4.0378E-05

1.9792E-06

-1.6403E-05

-6.5019E-06

S4

5.7176E-02

-5.2008E-03

1.1800E-03

-3.0651E-04

1.2492E-04

-7.9249E-05

1.7478E-05

-2.6888E-05

-5.3862E-06

S5

-1.0084E-01

-2.1073E-03

1.1411E-03

-9.2797E-05

1.1868E-04

-5.2583E-05

1.5740E-05

-5.4637E-06

2.3721E-06

S6

-9.8588E-02

-4.2055E-03

1.6771E-03

-1.0602E-04

8.7049E-05

-4.6274E-05

7.2113E-06

-2.9546E-06

2.4998E-06

S7

8.3419E-02

-1.2132E-02

4.1429E-03

-1.6046E-03

-3.7998E-04

5.6246E-05

5.2078E-05

5.5209E-05

7.2758E-06

S8

1.9781E-01

1.6282E-03

7.3504E-03

-2.2113E-03

-1.9537E-03

9.9477E-04

4.2531E-05

2.7752E-04

-3.2518E-05

S9

-7.6792E-02

-1.3656E-02

6.4029E-03

-1.1694E-03

-1.3086E-03

2.8027E-03

5.7961E-04

-5.3001E-05

-3.9500E-04

S10

8.6821E-02

3.8004E-03

-9.1758E-03

-3.6852E-05

3.6076E-04

6.8603E-04

1.0226E-03

-1.1173E-03

6.3846E-05

S11

-1.6953E+00

4.0585E-01

-1.1771E-01

3.0106E-02

-7.3438E-03

1.0359E-03

7.5773E-05

-1.2451E-03

8.4611E-04

S12

-3.5895E+00

6.9745E-01

-2.3109E-01

8.8269E-02

-3.2935E-02

1.4016E-02

-6.1316E-03

1.7508E-03

-3.8549E-04

Watch 10

Fig. 22A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 22B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 22C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 22D 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. Fig. 23A, 24A, and 25A show graphs of the focal shift of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the object in embodiment 5, respectively, which represent the pixel sizes in the meridional field of view and the sagittal field of view at different amounts of focal shift. Fig. 23B, 24B, and 25B show MTF graphs of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the subject in embodiment 5, respectively, which represent pixel sizes in the meridional field of view and the sagittal field of view at different frequencies. As can be seen from fig. 22A to 25B, 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. 26 to 30B. Fig. 26 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 26, the optical imaging lens, in order from an object side to an image side, comprises: a stop STO, a first lens E1, an auto-focus assembly T (including a flexible film, a liquid material, and a light transmissive module), a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image plane S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex 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 positive power, and has a concave 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 convex 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. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 4.11mm, the total length TTL of the optical imaging lens is 5.21mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 2.77mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 32.8 °, and the aperture value Fno of the optical imaging lens is 2.58.

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

In this example, the image side of the liquid material and the light transmissive module may be glued together. By changing the curvature radius of the surface of the flexible film and the curvature radius of the object side surface of the liquid material in the automatic focusing assembly T, the total effective focal length of the optical imaging lens can be changed along with the change of the distance from a shot object, so that the automatic focusing function of the optical imaging lens is realized. Specifically, when the distance D1 between the optical imaging lens and the subject is 350mm, the object-side surface of the auto-focusing assembly T is a plane, and the radius of curvature RT is infinity. When the distance D1 between the optical imaging lens and the object is 150mm, the object-side surface of the auto-focusing assembly T is convex, and the radius of curvature RT is 110.8000. When the distance D1 between the optical imaging lens and the object is infinity, the object side of the auto-focusing assembly T is concave, and the radius of curvature RT is-150.8000.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3516E-02

-6.3348E-03

-1.4553E-03

7.6720E-05

2.9164E-04

1.6296E-04

4.1714E-06

-8.2283E-05

-1.0235E-04

S2

-1.7281E-02

-5.0943E-03

-3.6664E-04

4.3543E-04

4.0486E-04

2.3734E-04

7.7952E-05

-2.0740E-05

-6.4155E-05

S3

4.9564E-02

-6.3146E-03

5.7081E-04

-7.7683E-05

1.3691E-05

-3.4489E-06

-1.4005E-06

-3.1757E-06

-2.4276E-06

S4

5.8383E-02

-5.7093E-03

1.1540E-03

1.3352E-04

1.2931E-04

4.5704E-05

1.9610E-05

3.3954E-06

-1.4510E-06

S5

-1.0411E-01

-1.9585E-03

3.8953E-04

5.7415E-04

3.9108E-04

1.8617E-04

9.9629E-05

4.1525E-05

1.5864E-05

S6

-1.4936E-01

-3.3147E-04

5.8158E-04

5.4547E-04

3.8196E-04

1.0523E-04

5.6521E-05

1.7268E-05

5.8420E-06

S7

1.3019E-01

8.3925E-03

-5.4742E-03

-1.6421E-03

1.1219E-03

-2.4457E-04

1.6094E-04

1.3339E-04

-1.1125E-05

S8

5.3867E-01

-1.1833E-02

4.7796E-03

-9.1537E-03

3.3775E-03

-2.7705E-04

6.6501E-05

4.2260E-04

1.9602E-04

S9

4.4703E-01

-9.3786E-02

2.7681E-02

-5.5577E-03

3.7003E-03

-1.4916E-03

-5.4183E-04

1.2900E-03

3.7372E-04

S10

3.1221E-01

1.7103E-02

-1.4704E-02

5.8742E-03

-3.1442E-03

2.4763E-03

-1.2957E-03

1.3464E-03

-9.7791E-04

S11

-2.0568E+00

6.5321E-01

-1.9921E-01

5.8830E-02

-2.4318E-02

1.3255E-02

-4.1583E-03

7.2482E-04

-2.1417E-03

S12

-3.9342E+00

8.0914E-01

-2.6193E-01

1.1030E-01

-4.7576E-02

2.1627E-02

-9.1443E-03

6.3434E-03

-3.2186E-03

TABLE 12

Fig. 27A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 27B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 27C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 27D 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. Fig. 28A, 29A, and 30A show graphs of the focal shift of the optical imaging lens in the wavelength band range of 470nm to 650nm at 350mm, 150mm, and infinity from the object in embodiment 6, respectively, which show the pixel sizes in the meridional field of view and the sagittal field of view at different amounts of focal shift. Fig. 28B, 29B, and 30B show MTF graphs in the wavelength band range of 470nm to 650nm of the optical imaging lens at 350mm, 150mm, and infinity from the subject in embodiment 6, respectively, which represent pixel sizes in the meridional field of view and the sagittal field of view at different frequencies. As can be seen from fig. 27A to 30B, 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 whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (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 those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (12)

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 positive optical power;

an autofocus assembly having a variable radius of curvature of an object side;

the image side surface of the second lens is a concave surface;

a third lens with focal power, wherein the image side surface of the third lens is convex;

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

at least one subsequent lens having an optical power;

at least one mirror surface from the object side surface of the first lens to the image side surface of the lens closest to the image side is an aspheric mirror surface.

2. The optical imaging lens of claim 1, wherein the at least one subsequent lens comprises a fifth lens, and the total effective focal length f of the optical imaging lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 1.0 < | f/R10| < 5.5.

3. 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: f1/R1 is more than 1.5 and less than 2.5.

4. The optical imaging lens of claim 1, wherein the radius of curvature R6 of the image side surface of the third lens and the effective focal length f3 of the third lens satisfy: 0.5 < | R6/f3| < 2.5.

5. The optical imaging lens of claim 1, wherein the effective focal length f4 of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: -3.0 < f4/R8 < -2.0.

6. The optical imaging lens of claim 1, wherein the central thickness CT1 of the first lens on the optical axis and the central thickness D of the auto-focus assembly on the optical axis satisfy: CT1/D is more than 1.0 and less than 2.0.

7. The optical imaging lens of claim 1 wherein a center thickness D of the auto-focus assembly on the optical axis is spaced a distance T from the first lens and the auto-focus assembly on the optical axis_1-TSatisfies the following conditions: D/T is more than 1.5_1-T＜6.0。

8. The optical imaging lens of claim 1, wherein the at least one subsequent lens comprises a fifth lens, a center thickness CT5 of the fifth lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy: T34/CT5 is more than 1.0 and less than 3.5.

9. The optical imaging lens of claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy: 2.0 < CT4/CT2 < 5.0.

10. The optical imaging lens according to any one of claims 1 to 9, wherein a half Semi-FOV of a maximum field angle of the optical imaging lens satisfies: Semi-FOV > 25.

11. The optical imaging lens of any one of claims 1 to 9, wherein a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens satisfy: TTL/ImgH is more than 1.5 and less than 2.1.

12. The optical imaging lens of any one of claims 1 to 9 wherein the auto-focus assembly comprises, in order along the optical axis from the first lens to the second lens: a flexible film, a liquid material, and a light transmissive module, wherein,

the flexible film is arranged on the object side of the liquid material; and

the image side surface of the liquid material is glued with the light-transmitting module.

Images