Optical imaging lens

Abstract

This application discloses an optical imaging lens comprising, in order from the object side to the image side along the optical axis, a first lens having positive optical power; a second lens having optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having optical power; and a sixth lens having negative optical power. The second lens is a liquid lens with a variable curvature radius, and its effective focal length changes as the curvature radius of the second lens changes.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical imaging lens. Background Art

[0002] With the rapid development of the lens industry, the image quality of optical imaging lenses used in portable electronic products such as smartphones is becoming increasingly higher. At the same time, users are also demanding more from their mobile phone cameras. Currently, optical imaging lenses are developing in the direction of continuous zoom, etc. However, most lens manufacturers have installed mechanical motors in their lenses to achieve continuous zoom. However, optical imaging lenses with mechanical motors are bulky, which is contrary to the current trend of miniaturization and thinness in smartphones.

[0003] Therefore, how to ensure the miniaturization, lightness and imaging quality of optical imaging lenses while also enabling them to have a continuous zoom function has become one of the urgent problems that many lens designers need to solve. Summary of the Invention

[0004] In one aspect, the present application provides an optical imaging lens comprising, in order from the object side to the image side along the optical axis, a first lens having positive optical power; a second lens having optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having optical power; and a sixth lens having negative optical power. The second lens is a liquid lens with a variable curvature radius, and its effective focal length changes as the curvature radius of the second lens changes.

[0005] In one embodiment, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface.

[0006] In one embodiment, the second lens includes a bendable component, a liquid lens, a first lens module, and a second light-transmitting module, wherein the liquid lens is deformed according to a voltage applied thereto, causing the bendable component to be deformed.

[0007] In one embodiment, the distance OBJ from the object to the object-side surface of the first lens on the optical axis may satisfy: OBJ ≥ 40 mm.

[0008] In one embodiment, the effective focal length f2 of the second lens may satisfy: -101 mm < f2 < 80 mm.

[0009] In one embodiment, an air interval T12 between the first lens and the second lens on the optical axis and a center thickness CT2 of the second lens on the optical axis may satisfy the following: 2.0<T12 / CT2<4.5.

[0010] In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R1 of the object-side surface of the first lens element may satisfy the relationship: 1.5<f / R1≤2.0.

[0011] In one embodiment, a curvature radius R9 of the image-side surface of the third lens and a curvature radius R10 of the object-side surface of the fourth lens may satisfy: 11.98<(R9+R10) / |R9-R10|<42.98.

[0012] In one embodiment, the sum of the air intervals ΣAT between any two adjacent lenses from the first to sixth lenses on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.5<ΣAT / T45<2.0.

[0013] In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens may satisfy: 2.5<|f2 / f|<10.0.

[0014] In one embodiment, the total effective focal length f of the optical imaging lens may satisfy: 7.0 mm < f < 13.0 mm.

[0015] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 2.0<f / EPD<3.5.

[0016] In one embodiment, half of the maximum field of view (Semi-FOV) of the optical imaging lens may satisfy: Semi-FOV>10°.

[0017] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and a sum ΣCT of the center thicknesses of the first to sixth lenses on the optical axis may satisfy: 2.5<TTL / ΣCT<3.1.

[0018] In one embodiment, at least two lenses among the first to sixth lenses have an Abbe number less than 20.

[0019] In one embodiment, a curvature radius R3 of the object-side surface of the second lens may satisfy: -29.05 mm ≤ R3 ≤ 22.79 mm.

[0020] In one embodiment, a center thickness of the second lens on the optical axis is variable; and an air spacing between the first lens and the second lens on the optical axis is variable.

[0021] Another aspect of the present application provides an optical imaging lens, comprising, in order from the object side to the image side along the optical axis: a first lens having positive optical power; a second lens having optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having optical power; and a sixth lens having negative optical power; the second lens having a variable central thickness along the optical axis; and a variable air spacing along the optical axis between the first lens and the second lens.

[0022] In one embodiment, the second lens includes a bendable component, a liquid lens, a first lens module, and a second light-transmitting module, wherein the liquid lens is deformed according to a voltage applied thereto, causing the bendable component to be deformed.

[0023] In one embodiment, the distance OBJ from the object to the object-side surface of the first lens on the optical axis may satisfy: OBJ ≥ 40 mm.

[0024] In one embodiment, the effective focal length f2 of the second lens may satisfy: -101 mm < f2 < 80 mm.

[0025] In one embodiment, an air interval T12 between the first lens and the second lens on the optical axis and a center thickness CT2 of the second lens on the optical axis may satisfy the following: 2.0<T12 / CT2<4.5.

[0026] In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R1 of the object-side surface of the first lens element may satisfy the relationship: 1.5<f / R1≤2.0.

[0027] In one embodiment, a curvature radius R9 of the image-side surface of the third lens and a curvature radius R10 of the object-side surface of the fourth lens may satisfy: 11.98<(R9+R10) / |R9-R10|<42.98.

[0028] In one embodiment, the sum of the air intervals ΣAT between any two adjacent lenses from the first to sixth lenses on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.5<ΣAT / T45<2.0.

[0029] In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens may satisfy: 2.5<|f2 / f|<10.0.

[0030] In one embodiment, the total effective focal length f of the optical imaging lens may satisfy: 7.0 mm < f < 13.0 mm.

[0031] In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 2.0<f / EPD<3.5.

[0032] In one embodiment, half of the maximum field of view (Semi-FOV) of the optical imaging lens may satisfy: Semi-FOV>10°.

[0033] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and a sum ΣCT of the center thicknesses of the first to sixth lenses on the optical axis may satisfy: 2.5<TTL / ΣCT<3.1.

[0034] In one embodiment, at least two lenses among the first to sixth lenses have an Abbe number less than 20.

[0035] In one embodiment, a curvature radius R3 of the object-side surface of the second lens may satisfy: -29.05 mm ≤ R3 ≤ 22.79 mm.

[0036] In one embodiment, the second lens is a liquid lens with a variable curvature radius, and the effective focal length of the liquid lens changes as the curvature radius of the second lens changes.

[0037] The present application provides an optical imaging lens suitable for portable electronic products by reasonably allocating optical focal length and optimizing optical parameters, which is lightweight, miniaturized, variable-focus, and has good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0039] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0040] Figures 2A to 2C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 1 are respectively shown when the lens is infinitely far from the object;

[0041] Figures 2D to 2F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 1 are shown respectively when the lens is 40 mm away from the object;

[0042] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0043] Figures 4A to 4CThe distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 2 are respectively shown when the lens is infinitely far from the object;

[0044] Figures 4D to 4F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 2 are respectively shown when the lens is 40 mm away from the object;

[0045] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0046] Figures 6A to 6C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 3 are respectively shown when the lens is infinitely far from the object;

[0047] Figures 6D to 6F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 3 are shown respectively when the lens is 40 mm away from the object;

[0048] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0049] Figures 8A to 8C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 4 are respectively shown when the lens is infinitely far from the object;

[0050] Figures 8D to 8F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 4 are respectively shown when the lens is 40 mm away from the object;

[0051] Figure 9 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0052] 10A to 10C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 5 are respectively shown when the lens is infinitely far from the object;

[0053] Figures 10D to 10F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 5 are shown respectively when the lens is 40 mm away from the object;

[0054] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0055] 12A to 12C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 6 are respectively shown when the lens is infinitely far from the object;

[0056] 12D to 12F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 6 are shown respectively when the lens is 40 mm away from the object;

[0057] Figure 13 1 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0058] 14A to 14C The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 7 are respectively shown when the lens is infinitely far from the object;

[0059] 14D to 14F The distortion curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 7 are shown respectively when the lens is 40 mm away from the object; and

[0060] Figure 15A and Figure 15B Schematic diagrams of the structure of the second lens of the optical imaging lens system according to an exemplary embodiment of the present application are respectively shown when the distance from the object to be photographed is infinite and 40 mm. DETAILED DESCRIPTION

[0061] 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 these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0062] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0063] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0064] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0065] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0066] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0067] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0068] The features, principles and other aspects of the present application are described in detail below.

[0069] An optical imaging lens according to an exemplary embodiment of the present application may include six lenses having optical power: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged sequentially along the optical axis from the object side to the image side. An air gap may be provided between any two adjacent lenses among the first through sixth lenses.

[0070] In an exemplary embodiment, the first lens may have positive optical power; the second lens may have positive optical power or negative optical power; the third lens may have negative optical power; the fourth lens may have positive optical power; the fifth lens may have positive optical power or negative optical power; and the sixth lens may have negative optical power.

[0071] In an exemplary embodiment, by reasonably allocating the optical power of the first lens to the sixth lens, it is possible to effectively balance the low-order aberrations generated by each lens, reduce the tolerance sensitivity of each lens, and maintain the miniaturization of the optical imaging lens.

[0072] In an exemplary embodiment, the second lens is a liquid lens with a variable radius of curvature, and its effective focal length is variable as the radius of curvature of the object-side surface of the second lens changes. By configuring the second lens as a liquid lens, the optical power of the second lens can be continuously variable, significantly improving the imaging performance of the optical imaging lens at different object distances, allowing the optical imaging lens to meet shooting requirements at different object distances. In particular, configuring the second lens as a liquid lens can significantly shorten the overall length of the optical imaging lens, making it more compact and conducive to meeting the needs of miniaturization.

[0073] In an exemplary embodiment, the center thickness of the second lens on the optical axis can be variable, and the air gap between the first lens and the second lens on the optical axis can be variable. By controlling the variable center thickness of the second lens and the variable air gap between the first lens and the second lens, the optical imaging lens can achieve excellent imaging performance at both macro and infinite object distances.

[0074] According to an exemplary embodiment of the present application, the second lens may include a bendable component, a liquid lens, a first light-transmitting module, and a second light-transmitting module, which are arranged in sequence. The bendable component may be arranged on the object side of the liquid lens, and the first light-transmitting module and the second light-transmitting module may be arranged in sequence on the image side of the liquid lens. The radius of curvature of the object side of the second lens is variable, that is, the radius of curvature of the surface of the bendable component and the radius of curvature of the object side of the liquid lens are variable. The radius of curvature of the object side of the second lens may change according to the change in the distance between the optical imaging lens and the object to be photographed, so as to ensure the shooting quality of the optical imaging lens at different object distances.

[0075] The second lens may include a bendable component, a liquid lens, a first light-transmitting module, and a second light-transmitting module. The liquid lens may be deformed when a voltage is applied, and drive the bendable component to be deformed. The shape change of the liquid lens and the bendable component may be reflected as a change in the radius of curvature of the second lens. In some embodiments, the shape change of the liquid lens and the bendable component may be specifically reflected as a change in the radius of curvature of the object side of the second lens, wherein the bendable component may be a bendable film. The effective focal length of the second lens may change with the change in the radius of curvature of the second lens. In some examples, the effective focal length of the second lens may change linearly with the change in the radius of curvature of the second lens.

[0076] Because the second lens has a variable focal length, the optical imaging lens can have a variable total effective focal length. In some examples, the optical imaging lens according to the present application can have a linearly varying total effective focal length. Therefore, the optical lens according to the present application is suitable for shooting at a variety of object distances.

[0077] Figure 15A A schematic diagram of the structure of the flexible film T1, liquid lens T2, first light-transmitting module T3, and second light-transmitting module T4 of the optical imaging lens of the present application when the lens is infinitely far from the object being photographed is shown. The surface of the flexible film T1 and the object-side surface of the liquid lens T2 are deformed, for example, into concave surfaces. Figure 15B The structure of the flexible film T1', liquid lens T2', first light-transmitting module T3', and second light-transmitting module T4' of the optical imaging lens of the present application at a distance of 40 mm from the object is shown. The surface of the flexible film T1' and the object-side surface of the liquid lens T2' are deformed, for example, both may be deformed into convex surfaces. Specifically, the liquid lens T2 or the liquid lens T2' may be directly connected to electrodes. When an external voltage is applied to both ends of the electrodes, the object-side surface of the liquid lens T2 or the liquid lens T2' may be deformed, which in turn may cause the flexible film T1 or the flexible film T1' to be deformed, thereby changing the air gap between the first lens and the second lens and the effective focal length of the second lens, thereby adjusting the total effective focal length of the optical imaging lens.

[0078] According to exemplary embodiments of the present application, a drive system, such as a voice coil motor, micro-electromechanical system, piezoelectric system, or memory metal, can be used to apply voltage to both ends of the electrode. This drive system can adjust the focal length of the optical imaging lens to achieve an optimal imaging position, thereby ensuring clear imaging at varying distances from the lens to the subject.

[0079] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the requirement: OBJ ≥ 40 mm, where OBJ is the distance from the subject to the object-side surface of the first lens element along the optical axis. Meeting OBJ ≥ 40 mm ensures that the optical imaging lens has excellent imaging performance at both macro and infinite object distances.

[0080] In an exemplary embodiment, as the radius of curvature of the object-side surface of the second lens changes, the effective focal length f2 of the second lens satisfies the following: -101 mm < f2 < 80 mm. This condition, -101 mm < f2 < 80 mm, minimizes the contribution of the third-order and fifth-order spherical aberrations of the second lens, balancing the remaining spherical aberration generated by the subsequent lens element of the optical imaging lens. This reduces axial aberrations and thus achieves good imaging quality.

[0081] In an exemplary embodiment, the air spacing between the first and second lenses on the optical axis and the center thickness of the second lens on the optical axis can vary with the radius of curvature of the object-side surface of the second lens. The optical imaging lens according to the present application can satisfy the following conditions: 2.0 < T12 / CT2 < 4.5, where T12 is the air spacing between the first and second lenses on the optical axis, and CT2 is the center thickness of the second lens on the optical axis. Meeting this requirement effectively reduces the risk of ghost images between the first and second lenses and reduces the overall size of the optical imaging lens.

[0082] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 1.5 < f / R1 ≤ 2.0, where f is the total effective focal length of the optical imaging lens and R1 is the radius of curvature of the object-side surface of the first lens element. More specifically, f and R1 may further satisfy the following conditions: 1.7 < f / R1 ≤ 2.0. This condition effectively controls the contribution of the first lens element to the fifth-order spherical aberration of the optical imaging lens, thereby facilitating compensation for the third-order spherical aberration generated by the first lens element, resulting in excellent on-axis imaging quality.

[0083] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy the following conditions: 11.98 < (R9 + R10) / |R9 - R10| < 42.98, where R9 is the radius of curvature of the image-side surface of the third lens element, and R10 is the radius of curvature of the object-side surface of the fourth lens element. This condition effectively controls the refraction angles of the light beam at the third and fourth lens elements, resulting in the optical imaging lens having excellent processing characteristics.

[0084] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 1.5 < ∑AT / T45 < 2.0, where ∑AT is the sum of the air spacings on the optical axis between any two adjacent lenses from the first to sixth lenses, and T45 is the air spacing on the optical axis between the fourth and fifth lenses. More specifically, ∑AT and T45 may further satisfy the following conditions: 1.6 < ∑AT / T45 < 2.0. Meeting 1.5 < ∑AT / T45 < 2.0 not only ensures the processing and assembly characteristics of each lens, avoiding problems such as front-to-back lens interference caused by insufficient spacing between adjacent lenses during assembly, but also reduces light deflection, adjusts the field curvature of the optical imaging lens, and reduces sensitivity, thereby achieving better imaging quality.

[0085] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: 2.5 < |f2 / f| < 10.0, where f is the total effective focal length of the optical imaging lens and f2 is the effective focal length of the second lens element. This 2.5 < |f2 / f| < 10.0 allows the second lens element to balance the residual spherical aberration generated by the subsequent lens element of the optical imaging lens, minimizing on-axis aberration and achieving good imaging quality.

[0086] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: 7.0 mm < f < 13.0 mm, where f is the total effective focal length of the optical imaging lens. More specifically, f may further satisfy the following conditions: 7.4 mm < f < 12.5 mm. This condition of 7.0 mm < f < 13.0 mm facilitates the optical imaging lens to possess telephoto characteristics.

[0087] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following relationship: 2.0 < f / EPD < 3.5, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. Meeting 2.0 < f / EPD < 3.5 facilitates achieving a telephoto characteristic of the optical imaging lens.

[0088] In an exemplary embodiment, the optical imaging lens according to the present application can meet the following requirements: Semi-FOV > 10°, where Semi-FOV is half of the maximum field of view of the optical imaging lens. Meeting Semi-FOV > 10° can effectively control the imaging range of the optical imaging lens.

[0089] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy the following relationship: 2.5 < TTL / ∑CT < 3.1, where TTL is the distance along the optical axis from the object-side surface of the first lens element to the imaging plane of the optical imaging lens, and ∑CT is the sum of the center thicknesses of the first through sixth lenses along the optical axis. Meeting this requirement allows for reasonable control of lens distortion, resulting in excellent distortion performance.

[0090] In an exemplary embodiment, the Abbe number of at least two lenses among the first to sixth lenses is less than 20. This configuration can effectively reduce the chromatic aberration of the lens and prevent the occurrence of imaging overlap, thereby helping the lens to obtain better imaging quality.

[0091] In an exemplary embodiment, the radius of curvature R3 of the object-side surface of the second lens element may be variable. For example, the radius of curvature R3 of the object-side surface of the second lens element may satisfy the following conditions: -29.05 mm ≤ R3 ≤ 22.79 mm. This condition allows for reasonable control of the deflection angle of light rays at the edge of the optical imaging lens, effectively reducing the sensitivity of the lens.

[0092] In an exemplary embodiment, the optical imaging lens according to the present application further includes an aperture provided 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 the photosensitive element located on the imaging surface. The present application proposes an optical imaging lens having the characteristics of miniaturization, lightness, variable focus, and high imaging quality. The optical imaging lens according to the above embodiment of the present application may adopt multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical power, surface shape, center thickness of each lens, and axial spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0093] In an embodiment of the present application, the object side surface and the image side surface of the first lens, and at least one of the mirror surfaces from the object side surface of the third lens to the image side surface of the sixth lens are aspherical mirror surfaces. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs when imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical mirror surfaces.

[0094] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while six lenses are described in the embodiments, the optical imaging lens is not limited to six lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0095] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0096] Example 1

[0097] The following reference Figures 1 to 2F The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0098] like Figure 1As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0099] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. In this example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0100] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The third lens E3 has negative focal power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fourth lens E4 has positive focal power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive focal power, with its object-side surface S12 being concave and its image-side surface S13 being convex. The sixth lens E6 has negative focal power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0101] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness / distance and focal length are all millimeters (mm).

[0102]

[0103] Table 1

[0104] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0105] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -29.0483 mm, the curvature radius R4 of the object side S4 of the liquid lens is -29.0483 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.6425 mm, the center thickness D3 of the liquid lens on the optical axis is 0.2650 mm, and the effective focal length f2 of the second lens is -100 mm.

[0106] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 9.6908 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 9.6908 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.4935 mm, the center thickness D3 of the liquid lens on the optical axis is 0.4240 mm, and the effective focal length f2 of the second lens is 33.33 mm.

[0107] In this example, the total length TTL of the optical imaging lens (i.e., the distance from the object-side surface S1 of the first lens element E1 to the imaging surface S18 of the optical imaging lens on the optical axis) is 11.60 mm, and half of the diagonal length of the effective pixel area on the imaging surface S18 of the optical imaging lens ImgH is 2.24 mm.

[0108] When the distance D1 between the optical imaging lens and the object is infinite, the central thickness CT2 of the second lens on the optical axis (i.e., the distance from the surface S3 of the flexible film to the image-side surface S7 of the second light-transmitting module on the optical axis) is 0.55 mm, the total effective focal length f of the optical imaging lens is 11.60 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.9°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.38.

[0109] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.70 mm, the total effective focal length f of the optical imaging lens is 7.63 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.5°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.22.

[0110] In Example 1, the object-side surface and the image-side surface of any of the first lens E1 and the third lens E3 to the sixth lens E6 are all aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0111]

[0112] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0113] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.6652E-04 -1.4256E-02 7.1442E-02 -2.0435E-01 3.8344E-01 -4.9615E-01 4.5533E-01 S2 -2.5789E-03 -3.1757E-03 2.4444E-02 -7.6390E-02 1.5460E-01 -2.1608E-01 2.1452E-01 S8 -1.5233E-01 2.5954E-01 -6.1831E-01 1.1647E+00 -1.5053E+00 1.2059E+00 -3.8714E-01 S9 -3.9141E-01 1.2189E+00 -3.2403E+00 6.5869E+00 -1.0105E+01 1.1609E+01 -9.9298E+00 S10 -2.7559E-01 1.1483E+00 -2.9944E+00 5.7242E+00 -8.2450E+00 8.9294E+00 -7.2218E+00 S11 -5.4729E-03 1.0871E-01 -3.4075E-01 7.3339E-01 -1.1868E+00 1.4293E+00 -1.2657E+00 S12 -2.8836E-02 7.5646E-02 -1.2194E-01 -4.2547E-02 5.5452E-01 -1.2306E+00 1.5494E+00 S13 -3.2415E-01 9.4678E-01 -2.0435E+00 3.3519E+00 -4.1226E+00 3.6787E+00 -2.3175E+00 S14 -6.1894E-01 1.2718E+00 -2.0792E+00 2.3318E+00 -1.2493E+00 -8.9638E-01 2.5681E+00 S15 -3.1815E-01 4.7503E-01 -7.4453E-01 9.6682E-01 -9.6592E-01 7.2143E-01 -3.9749E-01

[0114] Table 2-1

[0115] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.0063E-01 1.4317E-01 -4.8705E-02 1.1536E-02 -1.8058E-03 1.6785E-04 -7.0112E-06 S2 -1.5323E-01 7.8848E-02 -2.8926E-02 7.3692E-03 -1.2374E-03 1.2301E-04 -5.4789E-06 S8 -3.1891E-01 5.0528E-01 -3.3175E-01 1.2960E-01 -3.1142E-02 4.2754E-03 -2.5803E-04 S9 6.2866E+00 -2.9192E+00 9.7824E-01 -2.2972E-01 3.5806E-02 -3.3220E-03 1.3861E-04 S10 4.3293E+00 -1.9044E+00 6.0450E-01 -1.3443E-01 1.9842E-02 -1.7439E-03 6.9015E-05 S11 8.2151E-01 -3.8981E-01 1.3392E-01 -3.2488E-02 5.2808E-03 -5.1551E-04 2.2799E-05 S12 -1.2468E+00 6.4934E-01 -2.0798E-01 3.3521E-02 3.7088E-04 -1.0055E-03 1.1053E-04 S13 9.9796E-01 -2.7586E-01 4.0622E-02 -2.6116E-06 -1.0886E-03 1.6769E-04 -8.4892E-06 S14 -2.6599E+00 1.6658E+00 -6.8550E-01 1.8680E-01 -3.2523E-02 3.2801E-03 -1.4592E-04 S15 1.6014E-01 -4.6670E-02 9.6649E-03 -1.3779E-03 1.2773E-04 -6.8758E-06 1.6136E-07

[0116] Table 2-2

[0117] Figure 2A and 2D 2B and 2E respectively show the distortion curves of the optical imaging lens in Example 1 when the optical imaging lens is at infinity and 40mm away from the object, which represent the distortion magnitude values ​​corresponding to different image heights. 2C and 2F respectively show the relative illumination curves of the optical imaging lens in Example 1 when the optical imaging lens is at infinity and 40mm away from the object, which represent the deviation of the light at different image heights on the imaging surface after passing through the lens. 2C and 2F respectively show the relative illumination curves of the optical imaging lens in Example 1 when the optical imaging lens is at infinity and 40mm away from the object, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to Figures 2A to 2F It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0118] Example 2

[0119] The following reference Figures 3 to 4F The optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0120] like Figure 3As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0121] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0122] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The third lens E3 has negative optical power, with its object-side surface S8 being concave and its image-side surface S9 being concave. The fourth lens E4 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The sixth lens E6 has negative optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0123] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0124] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -29.0483 mm, the curvature radius R4 of the object side S4 of the liquid lens is -29.0483 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.7766 mm, the center thickness D3 of the liquid lens on the optical axis is 0.2394 mm, and the effective focal length f2 of the second lens is -100 mm.

[0125] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 9.6908 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 9.6908 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.5967 mm, the center thickness D3 of the liquid lens on the optical axis is 0.4293 mm, and the effective focal length f2 of the second lens is 33.33 mm.

[0126] In this example, the total length TTL of the optical imaging lens is 11.64 mm, and half of the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0127] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.52 mm, the total effective focal length f of the optical imaging lens is 11.41 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.1°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.35.

[0128] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.71 mm, the total effective focal length f of the optical imaging lens is 7.55 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.7°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.21.

[0129] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 2, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0130]

[0131] Table 3

[0132] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.1760E-03 5.6218E-03 -2.3763E-02 6.9321E-02 -1.3139E-01 1.6970E-01 -1.5432E-01 S2 -3.0556E-03 4.5529E-03 -1.7178E-02 5.2740E-02 -1.0433E-01 1.3791E-01 -1.2604E-01 S8 -1.2695E-01 1.7658E-01 -3.2081E-01 4.2828E-01 -2.5576E-01 -2.5698E-01 7.7463E-01 S9 -2.8363E-01 6.8152E-01 -1.4330E+00 2.2879E+00 -2.7081E+00 2.3257E+00 -1.3991E+00 S10 -1.7909E-01 6.1340E-01 -1.3350E+00 2.1411E+00 -2.6148E+00 2.4259E+00 -1.6929E+00 S11 4.2039E-04 5.5023E-02 -1.5210E-01 2.8132E-01 -3.9060E-01 4.0185E-01 -3.0294E-01 S12 -3.8190E-02 7.3950E-02 2.5494E-02 -6.2201E-01 1.9121E+00 -3.3809E+00 3.9656E+00 S13 -2.4958E-01 5.6414E-01 -8.4769E-01 7.3701E-01 -1.8246E-02 -9.4991E-01 1.4504E+00 S14 -4.7329E-01 6.3155E-01 -1.6639E-01 -1.7477E+00 4.9424E+00 -7.5703E+00 7.6983E+00 S15 -2.8832E-01 4.0637E-01 -5.7183E-01 6.4550E-01 -5.5507E-01 3.5884E-01 -1.7322E-01

[0133] Table 4-1

[0134] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0062E-01 -4.7276E-02 1.5877E-02 -3.7168E-03 5.7602E-04 -5.3090E-05 2.2020E-06 S2 8.1331E-02 -3.7340E-02 1.2128E-02 -2.7238E-03 4.0249E-04 -3.5213E-05 1.3822E-06 S8 -9.0272E-01 6.4400E-01 -3.0437E-01 9.5982E-02 -1.9489E-02 2.3113E-03 -1.2197E-04 S9 5.4539E-01 -1.0475E-01 -1.2762E-02 1.4002E-02 -3.8888E-03 5.2105E-04 -2.8655E-05 S10 8.7899E-01 -3.3533E-01 9.2285E-02 -1.7771E-02 2.2670E-03 -1.7177E-04 5.8421E-06 S11 1.6749E-01 -6.8026E-02 2.0154E-02 -4.2515E-03 6.0525E-04 -5.2003E-05 2.0292E-06 S12 -3.2266E+00 1.8479E+00 -7.4231E-01 2.0465E-01 -3.6858E-02 3.9035E-03 -1.8426E-04 S13 -1.2265E+00 6.7607E-01 -2.5190E-01 6.3022E-02 -1.0151E-02 9.5122E-04 -3.9394E-05 S14 -5.4813E+00 2.7729E+00 -9.9165E-01 2.4490E-01 -3.9710E-02 3.8026E-03 -1.6293E-04 S15 6.1919E-02 -1.6178E-02 3.0256E-03 -3.9120E-04 3.2917E-05 -1.6030E-06 3.3684E-08

[0135] Table 4-2

[0136] Figure 4A and 4D4B and 4E respectively show the distortion curves of the optical imaging lens in Example 2 when the optical imaging lens is at infinity and 40mm away from the object, which represent the distortion magnitude values ​​corresponding to different image heights. 4B and 4E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 2 when the optical imaging lens is at infinity and 40mm away from the object, which represent the deviation of different image heights on the imaging surface after the light passes through the lens. 4C and 4F respectively show the relative illumination curves of the optical imaging lens in Example 2 when the optical imaging lens is at infinity and 40mm away from the object, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to Figures 4A to 4F It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0137] Example 3

[0138] The following reference Figures 5 to 6F An optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0139] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0140] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0141] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The third lens E3 has negative optical power, with its object-side surface S8 being concave and its image-side surface S9 being concave. The fourth lens E4 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The sixth lens E6 has negative optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0142] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0143] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -10.1331 mm, the curvature radius R4 of the object side S4 of the liquid lens is -10.1331 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.8672 mm, the center thickness D3 of the liquid lens on the optical axis is 0.1519 mm, and the effective focal length f2 of the second lens is -34.90 mm.

[0144] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 18.6767 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 18.6767 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.6537 mm, the center thickness D3 of the liquid lens on the optical axis is 0.3603 mm, and the effective focal length f2 of the second lens is 64.26 mm.

[0145] In this example, the total length TTL of the optical imaging lens is 12.96 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0146] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.44 mm, the total effective focal length f of the optical imaging lens is 11.88 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.7°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.35.

[0147] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.65 mm, the total effective focal length f of the optical imaging lens is 7.78 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.4°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.20.

[0148] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 3, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0149]

[0150]

[0151] Table 5

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.4970E-04 1.0851E-03 -7.2052E-04 -3.2010E-03 1.2579E-02 -2.1693E-02 2.2729E-02 S2 -1.5985E-03 -1.2911E-04 9.1237E-03 -3.6232E-02 8.1777E-02 -1.1918E-01 1.1840E-01 S8 -1.0927E-01 1.2760E-01 -1.9674E-01 1.9000E-01 3.4637E-02 -4.1926E-01 6.8365E-01 S9 -2.5094E-01 5.6685E-01 -1.1320E+00 1.7498E+00 -2.0562E+00 1.8180E+00 -1.2003E+00 S10 -1.6272E-01 5.0879E-01 -1.0044E+00 1.4574E+00 -1.6060E+00 1.3417E+00 -8.4357E-01 S11 -2.9695E-03 4.2888E-02 -9.7244E-02 1.4636E-01 -1.6132E-01 1.2734E-01 -6.8844E-02 S12 -2.9711E-02 7.4117E-02 -1.4641E-01 1.8471E-01 -1.2703E-01 -2.2605E-02 1.4929E-01 S13 -2.2361E-01 5.6447E-01 -1.1169E+00 1.7733E+00 -2.1723E+00 1.9770E+00 -1.3191E+00 S14 -4.0394E-01 6.9138E-01 -1.0174E+00 1.2067E+00 -1.0926E+00 6.7311E-01 -2.1472E-01 S15 -2.4398E-01 2.9523E-01 -3.6622E-01 3.5210E-01 -2.4934E-01 1.2538E-01 -4.1863E-02

[0153] Table 6-1

[0154]

[0155]

[0156] Table 6-2

[0157] Figure 6A and 6D 6B and 6E respectively show the distortion curves of the optical imaging lens in Example 3 when the optical imaging lens is at infinity and 40mm away from the object, which represent the distortion magnitude values ​​corresponding to different image heights. 6B and 6E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 3 when the optical imaging lens is at infinity and 40mm away from the object, which represent the deviation of different image heights on the imaging surface after the light passes through the lens. 6C and 6F respectively show the relative illumination curves of the optical imaging lens in Example 3 when the optical imaging lens is at infinity and 40mm away from the object, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to Figures 6A to 6F It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0158] Example 4

[0159] The following reference Figures 7 to 8F An optical imaging lens according to Example 4 of the present application is described. Figure 7A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0160] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0161] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0162] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The third lens E3 has negative optical power, with its object-side surface S8 being concave and its image-side surface S9 being concave. The fourth lens E4 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. The sixth lens E6 has negative optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0163] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0164] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -11.9542 mm, the curvature radius R4 of the object side S4 of the liquid lens is -11.9542 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.9796 mm, the center thickness D3 of the liquid lens on the optical axis is 0.1576 mm, and the effective focal length f2 of the second lens is -41.17 mm.

[0165] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 16.1650 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 16.1650 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.7562 mm, the center thickness D3 of the liquid lens on the optical axis is 0.3830 mm, and the effective focal length f2 of the second lens is 55.62 mm.

[0166] In this example, the total length TTL of the optical imaging lens is 13.09 mm, and half of the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0167] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.44 mm, the total effective focal length f of the optical imaging lens is 12.32 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.3°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.34.

[0168] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.67 mm, the total effective focal length f of the optical imaging lens is 8.03 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.0°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.18.

[0169] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 4, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0170]

[0171]

[0172] Table 7

[0173] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.0268E-03 3.7360E-03 -1.0111E-02 1.8915E-02 -2.2037E-02 1.5689E-02 -5.9351E-03 S2 -2.4409E-03 2.6867E-03 -4.5318E-03 6.7422E-03 -5.4132E-03 1.0086E-04 4.6439E-03 S8 -1.0497E-01 1.1620E-01 -1.5249E-01 6.6680E-02 2.9735E-01 -8.3359E-01 1.1566E+00 S9 -2.4719E-01 5.2426E-01 -9.8985E-01 1.4535E+00 -1.6077E+00 1.3149E+00 -7.8145E-01 S10 -1.6257E-01 4.6167E-01 -8.6270E-01 1.1942E+00 -1.2567E+00 1.0045E+00 -6.0544E-01 S11 1.0395E-03 2.5048E-02 -5.4821E-02 7.6257E-02 -8.2109E-02 6.9029E-02 -4.3727E-02 S12 -4.5681E-02 1.2204E-01 -1.8868E-01 9.0138E-02 2.6777E-01 -7.1804E-01 9.0971E-01 S13 -2.6163E-01 6.9378E-01 -1.4222E+00 2.2789E+00 -2.7433E+00 2.4049E+00 -1.5189E+00 S14 -4.3660E-01 8.0550E-01 -1.3675E+00 1.8973E+00 -1.9549E+00 1.3612E+00 -5.4721E-01 S15 -2.4123E-01 3.2038E-01 -4.8211E-01 6.1262E-01 -6.0084E-01 4.3980E-01 -2.3755E-01

[0174] Table 8-1

[0175] Face number A18 A20 A22 A24 A26 A28 A30 S1 4.5763E-05 1.1970E-03 -6.6345E-04 1.9067E-04 -3.2111E-05 3.0064E-06 -1.2135E-07 S2 -5.3379E-03 3.2875E-03 -1.2789E-03 3.2341E-04 -5.1725E-05 4.7630E-06 -1.9265E-07 S8 -1.0289E+00 6.2487E-01 -2.6260E-01 7.5264E-02 -1.4056E-02 1.5429E-03 -7.5529E-05 S9 3.2875E-01 -9.3155E-02 1.5728E-02 -8.6292E-04 -2.0823E-04 4.3947E-05 -2.6285E-06 S10 2.7249E-01 -9.0406E-02 2.1697E-02 -3.6515E-03 4.0790E-04 -2.7123E-05 8.1155E-07 S11 2.0425E-02 -6.9923E-03 1.7487E-03 -3.1445E-04 3.8773E-05 -2.9347E-06 1.0226E-07 S12 -7.2747E-01 3.9288E-01 -1.4559E-01 3.6543E-02 -5.9430E-03 5.6540E-04 -2.3899E-05 S13 6.8754E-01 -2.2109E-01 4.9624E-02 -7.5246E-03 7.2702E-04 -4.0007E-05 9.5110E-07 S14 3.8819E-02 8.9221E-02 -5.5408E-02 1.6960E-02 -3.0044E-03 2.9417E-04 -1.2372E-05 S15 9.4225E-02 -2.7260E-02 5.6714E-03 -8.2513E-04 7.9628E-05 -4.5777E-06 1.1865E-07

[0176] Table 8-2

[0177] Figure 8A and 8D 8B and 8E respectively show the distortion curves of the optical imaging lens in Example 4 when the distance from the object is infinite and 40mm, which represent the distortion magnitude values ​​corresponding to different image heights. 8B and 8E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 4 when the distance from the object is infinite and 40mm, which represent the deviation of the light at different image heights on the imaging surface after passing through the lens. 8C and 8F respectively show the relative illumination curves of the optical imaging lens in Example 4 when the distance from the object is infinite and 40mm, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to Figures 8A to 8F It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0178] Example 5

[0179] The following reference Figures 9 to 10F An optical imaging lens according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0180] like Figure 9 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0181] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0182] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The third lens E3 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fourth lens E4 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. The sixth lens E6 has negative optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0183] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0184] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -12.4384 mm, the curvature radius R4 of the object side S4 of the liquid lens is -12.4384 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.9214 mm, the center thickness D3 of the liquid lens on the optical axis is 0.1626 mm, and the effective focal length f2 of the second lens is -42.83 mm.

[0185] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 16.9267 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 16.9267 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.7073 mm, the center thickness D3 of the liquid lens on the optical axis is 0.3787 mm, and the effective focal length f2 of the second lens is 58.24 mm.

[0186] In this example, the total length TTL of the optical imaging lens is 13.03 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0187] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.45 mm, the total effective focal length f of the optical imaging lens is 12.21 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.4°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.33.

[0188] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.66 mm, the total effective focal length f of the optical imaging lens is 7.86 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.1°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.15.

[0189] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0190]

[0191] Table 9

[0192]

[0193]

[0194] Table 10-1

[0195] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.4334E-02 -4.9928E-03 1.2369E-03 -2.1290E-04 2.4247E-05 -1.6493E-06 5.1058E-08 S2 1.8158E-02 -7.5991E-03 2.2799E-03 -4.7875E-04 6.6900E-05 -5.5955E-06 2.1219E-07 S8 -1.0789E+00 6.1654E-01 -2.4658E-01 6.7727E-02 -1.2179E-02 1.2917E-03 -6.1265E-05 S9 3.4140E-01 -9.9289E-02 1.7818E-02 -1.3566E-03 -1.3148E-04 3.6919E-05 -2.3431E-06 S10 4.1386E-01 -1.4625E-01 3.7449E-02 -6.7427E-03 8.0858E-04 -5.7935E-05 1.8754E-06 S11 1.1592E-01 -4.7749E-02 1.4203E-02 -2.9626E-03 4.1010E-04 -3.3756E-05 1.2479E-06 S12 -8.0119E-01 4.5870E-01 -1.8000E-01 4.7760E-02 -8.1949E-03 8.2078E-04 -3.6438E-05 S13 1.0855E+00 -4.0185E-01 1.0631E-01 -1.9633E-02 2.4127E-03 -1.7821E-04 6.0235E-06 S14 6.0106E-01 -1.7618E-01 3.1760E-02 -2.6589E-03 -1.1252E-04 4.2289E-05 -2.5357E-06 S15 9.1483E-02 -2.6780E-02 5.6524E-03 -8.3619E-04 8.2220E-05 -4.8256E-06 1.2794E-07

[0196] Table 10-2

[0197] Figure 10A and 10D 10B and 10E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 5 when the distance from the optical imaging lens to the object is infinite and 40mm, which represent the distortion magnitude values ​​corresponding to different image heights. 10C and 10F respectively show the relative illumination curves of the optical imaging lens in Example 5 when the distance from the optical imaging lens to the object is infinite and 40mm, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to 10A to 10FIt can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0198] Example 6

[0199] The following reference Figures 11 to 12F An optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0200] like Figure 11 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0201] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0202] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The third lens E3 has negative focal power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fourth lens E4 has positive focal power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has positive focal power, with its object-side surface S12 being convex and its image-side surface S13 being concave. The sixth lens E6 has negative focal power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0203] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0204] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -9.7252 mm, the curvature radius R4 of the object side S4 of the liquid lens is -9.7252 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.8576 mm, the center thickness D3 of the liquid lens on the optical axis is 0.1302 mm, and the effective focal length f2 of the second lens is -33.49 mm.

[0205] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 22.7931 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 22.7931 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.6233 mm, the center thickness D3 of the liquid lens on the optical axis is 0.3544 mm, and the effective focal length f2 of the second lens is 78.43 mm.

[0206] In this example, the total length TTL of the optical imaging lens is 13.31 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0207] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.42 mm, the total effective focal length f of the optical imaging lens is 12.23 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.4°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.31.

[0208] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.64 mm, the total effective focal length f of the optical imaging lens is 7.90 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.1°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.14.

[0209] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0210]

[0211] Table 11

[0212] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.2340E-04 2.7688E-03 -9.5035E-03 2.0675E-02 -2.8002E-02 2.4730E-02 -1.4504E-02 S2 -2.0779E-03 2.5532E-03 -7.9438E-03 2.0112E-02 -3.2811E-02 3.5763E-02 -2.6954E-02 S8 -1.0011E-01 1.2307E-01 -2.0933E-01 2.6794E-01 -1.8377E-01 -3.3394E-02 2.1831E-01 S9 -2.2941E-01 5.1232E-01 -9.9617E-01 1.5048E+00 -1.7249E+00 1.4793E+00 -9.4143E-01 S10 -1.5164E-01 4.5150E-01 -8.5120E-01 1.1890E+00 -1.2620E+00 1.0131E+00 -6.1085E-01 S11 -3.8330E-03 3.5638E-02 -7.5097E-02 1.1116E-01 -1.2619E-01 1.0890E-01 -7.0063E-02 S12 -3.4134E-02 7.2085E-02 -8.7149E-02 -1.2329E-02 2.3008E-01 -4.3962E-01 4.8435E-01 S13 -2.2360E-01 5.2320E-01 -8.7169E-01 1.0795E+00 -1.0029E+00 6.8547E-01 -3.3748E-01 S14 -3.9981E-01 6.4951E-01 -7.2905E-01 3.2839E-01 4.4054E-01 -1.0451E+00 1.0909E+00 S15 -2.3830E-01 3.1394E-01 -4.1761E-01 4.2331E-01 -3.1266E-01 1.6495E-01 -6.0413E-02

[0213] Table 12-1

[0214]

[0215]

[0216] Table 12-2

[0217] Figure 12A and 12D 12B and 12E respectively show the distortion curves of the optical imaging lens in Example 6 when the distance from the object is infinite and 40mm, which represent the distortion magnitude values ​​corresponding to different image heights. 12B and 12E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 6 when the distance from the object is infinite and 40mm, which represent the deviation of the light at different image heights on the imaging surface after passing through the lens. 12C and 12F respectively show the relative illumination curves of the optical imaging lens in Example 6 when the distance from the object is infinite and 40mm, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to 12A to 12F It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0218] Example 7

[0219] The following reference Figures 13 to 14F An optical imaging lens according to Example 7 of the present application is described. Figure 13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0220] like Figure 13 As shown, the optical imaging lens includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S18.

[0221] The second lens E2 may include, in sequence, a flexible film, a liquid lens, a first light-transmitting module, and a second light-transmitting module. Specifically, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module may be glued together to form the second lens E2. For example, the surface S3 of the flexible film is concave. The object-side surface S4 of the liquid lens is concave, and the image-side surface S5 is flat. The first light-transmitting module has an object-side surface S5 and an image-side surface S6. The second light-transmitting module has an object-side surface S6 and an image-side surface S7.

[0222] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The third lens E3 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fourth lens E4 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being concave. The fifth lens E5 has negative optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. The sixth lens E6 has negative optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E7 has an object-side surface S16 and an image-side surface S17. Light from the object passes through each surface S1 to S17 in sequence and is ultimately imaged on the imaging surface S18.

[0223] In this example, the flexible film, the liquid lens, the first light-transmitting module, and the second light-transmitting module are bonded together to form the second lens E2. By varying the radius of curvature of the object-side surface of the second lens E2 (i.e., by varying the radius of curvature R3 of the surface S3 of the flexible film and the radius of curvature R4 of the object-side surface S4 of the liquid lens), the optical axis separation distance D2 between the first and second lenses, the center thickness D3 of the liquid lens on the optical axis, and the effective focal length f2 of the second lens can be varied with the distance from the subject. This improves the imaging performance of the optical imaging lens at different object distances, enabling the optical imaging lens to meet shooting requirements at different object distances.

[0224] Specifically, when the distance D1 between the optical imaging lens and the object is infinity, the curvature radius R3 of the surface S3 of the flexible film is -13.3263 mm, the curvature radius R4 of the object side S4 of the liquid lens is -13.3263 mm, the spacing distance D2 between the first lens and the second lens on the optical axis is 1.8457 mm, the center thickness D3 of the liquid lens on the optical axis is 0.1691 mm, and the effective focal length f2 of the second lens is -45.89 mm.

[0225] When the distance D1 between the optical imaging lens and the object is 40 mm, the curvature radius R3 of the surface S3 of the flexible film is 17.3797 mm, the curvature radius R4 of the object-side surface S4 of the liquid lens is 17.3797 mm, the separation distance D2 between the first lens and the second lens on the optical axis is 1.6642 mm, the center thickness D3 of the liquid lens on the optical axis is 0.3767 mm, and the effective focal length f2 of the second lens is 59.80 mm.

[0226] In this example, the total length TTL of the optical imaging lens is 13.04 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S18 of the optical imaging lens is 2.24 mm.

[0227] When the distance D1 between the optical imaging lens and the object is infinity, the center thickness CT2 of the second lens element on the optical axis is 0.45 mm, the total effective focal length f of the optical imaging lens is 12.06 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 10.5°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 3.33.

[0228] When the distance D1 between the optical imaging lens and the object is 40 mm, the center thickness CT2 of the second lens element on the optical axis is 0.63 mm, the total effective focal length f of the optical imaging lens is 7.83 mm, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 11.1°, and the ratio (f / EPD) of the total effective focal length f of the optical imaging lens to the entrance pupil diameter (EPD) of the optical imaging lens is 2.16.

[0229] Table 13 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 7, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0230]

[0231]

[0232] Table 13

[0233] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.3019E-03 5.0398E-03 -1.6093E-02 3.6054E-02 -5.3158E-02 5.3621E-02 -3.8144E-02 S2 -3.1403E-03 4.7800E-03 -1.3880E-02 3.4930E-02 -6.0272E-02 7.2053E-02 -6.1041E-02 S8 -9.3404E-02 9.7664E-02 -8.3441E-02 -1.1010E-01 5.7476E-01 -1.1009E+00 1.2970E+00 S9 -2.4954E-01 5.4229E-01 -1.0065E+00 1.4572E+00 -1.6034E+00 1.3131E+00 -7.8628E-01 S10 -1.8511E-01 5.2487E-01 -9.9266E-01 1.4269E+00 -1.5809E+00 1.3335E+00 -8.4615E-01 S11 -5.5796E-03 5.2624E-02 -1.2147E-01 1.9607E-01 -2.4166E-01 2.2605E-01 -1.5894E-01 S12 -2.9865E-02 6.3872E-02 -7.4401E-02 -3.2189E-02 2.7823E-01 -5.6599E-01 6.9400E-01 S13 -2.5564E-01 5.9634E-01 -1.0775E+00 1.6065E+00 -1.9232E+00 1.7435E+00 -1.1546E+00 S14 -4.5137E-01 7.2632E-01 -1.0140E+00 1.1605E+00 -9.8857E-01 4.8799E-01 3.0803E-02 S15 -2.4671E-01 3.1668E-01 -4.6066E-01 5.7638E-01 -5.6250E-01 4.1208E-01 -2.2324E-01

[0234] Table 14-1

[0235] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.9500E-02 -7.2190E-03 1.9265E-03 -3.6304E-04 4.6080E-05 -3.5534E-06 1.2634E-07 S2 3.7200E-02 -1.6381E-02 5.1703E-03 -1.1413E-03 1.6739E-04 -1.4656E-05 5.7981E-07 S8 -1.0362E+00 5.7864E-01 -2.2642E-01 6.0904E-02 -1.0735E-02 1.1169E-03 -5.2012E-05 S9 3.3694E-01 -9.9816E-02 1.9040E-02 -1.9079E-03 -3.9668E-06 2.1358E-05 -1.5468E-06 S10 4.0006E-01 -1.3943E-01 3.5219E-02 -6.2587E-03 7.4116E-04 -5.2466E-05 1.6786E-06 S11 8.3603E-02 -3.2658E-02 9.3210E-03 -1.8834E-03 2.5439E-04 -2.0535E-05 7.4705E-07 S12 -5.7287E-01 3.2751E-01 -1.2977E-01 3.4930E-02 -6.0845E-03 6.1755E-04 -2.7674E-05 S13 5.4721E-01 -1.8211E-01 4.1347E-02 -6.0710E-03 5.1610E-04 -1.8808E-05 -5.9450E-08 S14 -2.5560E-01 2.0782E-01 -9.2867E-02 2.5804E-02 -4.4432E-03 4.3565E-04 -1.8643E-05 S15 8.8756E-02 -2.5682E-02 5.3273E-03 -7.7006E-04 7.3565E-05 -4.1720E-06 1.0633E-07

[0236] Table 14-2

[0237] Figure 14A and 14D 14B and 14E respectively show the distortion curves of the optical imaging lens in Example 7 when the optical imaging lens is at infinity and 40mm away from the object, which represent the distortion magnitude values ​​corresponding to different image heights. 14B and 14E respectively show the magnification chromatic aberration curves of the optical imaging lens in Example 7 when the optical imaging lens is at infinity and 40mm away from the object, which represent the deviation of different image heights on the imaging surface after the light passes through the lens. 14C and 14F respectively show the relative illumination curves of the optical imaging lens in Example 7 when the optical imaging lens is at infinity and 40mm away from the object, which represent the relative illumination magnitude values ​​corresponding to different image heights. According to 14A to 14FIt can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0238] In summary, when the optical imaging lens is at an infinite distance from the subject, Examples 1 to 7 respectively satisfy the relationship shown in Table 15-1; and when the optical imaging lens is at a distance of 40 mm from the subject, Examples 1 to 7 respectively satisfy the relationship shown in Table 15-2.

[0239] Conditional formula / Example 1 2 3 4 5 6 7 T12 / CT2 2.99 3.39 4.27 4.47 4.29 4.47 4.06 f1 / R1 1.99 2.00 1.82 1.83 1.83 1.84 1.81 (R9+R10) / |R9-R10| 42.98 41.57 22.61 16.61 13.44 12.84 12.23 ∑AT / T45 1.84 1.98 1.86 1.86 1.77 1.81 1.74 TTL / ∑CT 2.90 2.99 2.71 2.97 3.04 2.74 2.95 |f2 / f| 8.62 8.77 2.94 3.34 3.51 2.74 3.81

[0240] Table 15-1

[0241] Conditional formula / Example 1 2 3 4 5 6 7 T12 / CT2 2.12 2.23 2.56 2.63 2.57 2.57 2.63 f1 / R1 1.99 2.00 1.82 1.83 1.83 1.84 1.81 (R9+R10) / |R9-R10| 42.98 41.57 22.61 16.61 13.44 12.84 12.23 ∑AT / T45 1.79 1.92 1.80 1.79 1.72 1.75 1.69 TTL / ∑CT 2.79 2.85 2.59 2.83 2.89 2.62 2.84 |f2 / f| 4.37 4.42 8.26 6.92 7.41 9.93 7.64

[0242] Table 15-2

[0243] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0244] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having positive optical power and a convex object-side surface; a second lens having optical power; a third lens element having negative optical power and a concave image-side surface; a fourth lens element having positive optical power, with a convex object-side surface and a concave image-side surface; a fifth lens having optical power; and a sixth lens element having negative optical power, the object-side surface of which is convex and the image-side surface of which is concave; The optical imaging lens has six lenses with optical power. The second lens is a liquid lens with a variable curvature radius, and its effective focal length changes with the change of the curvature radius of the second lens; The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the sum ∑CT of the center thicknesses of the first to sixth lenses on the optical axis satisfy the following: 2.59≤TTL / ∑CT≤3.04; The effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: 1.81≤f1 / R1≤2.0; The curvature radius R9 of the image side surface of the third lens and the curvature radius R10 of the object side surface of the fourth lens satisfy: 12.23≤(R9+R10) / R9-R10 ≤42.

98.

2. The optical imaging lens according to claim 1, wherein: The second lens includes a bendable component, a liquid lens, a first light-transmitting module and a second light-transmitting module. The liquid lens is deformed according to the voltage applied thereto, and causes the bendable component to be deformed.

3. The optical imaging lens according to claim 2, wherein: The effective focal length f2 of the second lens satisfies: -100 mm≤f2≤78.43 mm.

4. The optical imaging lens according to claim 1, wherein: An air interval T12 between the first lens and the second lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy: 2.12≤T12 / CT2<4.

5.

5. The optical imaging lens according to claim 1, wherein: The sum of the air intervals ΣAT between any two adjacent lenses among the first to sixth lenses on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 1.69≤ΣAT / T45<2.

0.

6. The optical imaging lens according to claim 2, wherein: The total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: 2.74≤ f2 / f ≤9.

93.

7. The optical imaging lens according to any one of claims 1 to 6, wherein: The total effective focal length f of the optical imaging lens satisfies: 7.55 mm≤f≤12.32 mm.

8. The optical imaging lens according to any one of claims 1 to 6, wherein: The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following: 2.14≤f / EPD≤3.

38.

9. The optical imaging lens according to any one of claims 1 to 6, wherein: Half of the maximum field of view (Semi-FOV) of the optical imaging lens satisfies the following: 10.30°≤Semi-FOV≤11.70°.

10. The optical imaging lens according to any one of claims 1 to 6, wherein: An Abbe number of at least two lenses among the first to sixth lenses is less than 20.

11. The optical imaging lens according to any one of claims 1 to 6, wherein: The curvature radius R3 of the object-side surface of the second lens satisfies: -29.05 mm≤R3≤22.79 mm.

12. The optical imaging lens according to any one of claims 1 to 6, wherein: The center thickness of the second lens on the optical axis is variable; and An air interval between the first lens and the second lens on the optical axis is variable.

13. The optical imaging lens according to any one of claims 1 to 6, wherein: A distance OBJ from the object to the object-side surface of the first lens on the optical axis satisfies: OBJ ≥ 40 mm.

Images