Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a first lens, a second lens and a third lens in sequence from an object side to an image side, wherein the third lens is a catadioptric lens comprising an incident reflection surface, a first reflection surface, a second reflection surface and an exit reflection surface, light enters the third lens through the incident reflection surface, and the light exits the exit reflection surface after being reflected by at least part of the incident reflection surface, the first reflection surface, the second reflection surface and the exit reflection surface. At least one of the incident reflection surface, the first reflection surface, the second reflection surface and the exit reflection surface of the third lens has a non-rotationally symmetric aspheric surface.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical imaging lens. Background Technology

[0002] Due to module height limitations, 5X / 10X telephoto lenses generally employ a periscope design. However, with the continuous increase in chip size and consumers' growing demand for ultra-thin camera bodies, periscope telephoto lenses need further miniaturization.

[0003] To miniaturize telephoto lenses without sacrificing key parameters such as aperture, chamfering the lens element is a primary approach. However, due to limitations in manufacturing processes and stress, chamfered lenses tend to have greater astigmatism in the center field of view, leading to a decrease in image quality. Summary of the Invention

[0004] On one hand, this application provides an optical imaging lens, which sequentially includes a first lens, a second lens, and a third lens from the object side to the image side. The third lens is a catadioptric lens, including an incident reflecting surface, a first reflecting surface, a second reflecting surface, and an exit reflecting surface. Light enters the third lens through the incident reflecting surface, and after being reflected by at least a portion of the incident reflecting surface, the first reflecting surface, the second reflecting surface, and the exit reflecting surface, the light exits through the exit reflecting surface. Furthermore, at least one of the incident reflecting surface, the first reflecting surface, the second reflecting surface, and the exit reflecting surface has a non-rotationally symmetric aspherical surface.

[0005] In one embodiment, the distance TLZ from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens and the distance TLY from the object-side surface of the first lens to the imaging surface along a direction perpendicular to the optical axis of the first lens can satisfy: 0.2 <TLZ / TLY<1.0。

[0006] In one embodiment, the distance T3 from the intersection of the incident reflecting surface of the third lens and the optical axis of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens, and the distance TLZ from the object side surface of the first lens to the imaging surface along the optical axis of the first lens, can satisfy: 0.3 <T3 / TLZ<0.8。

[0007] In one embodiment, the distance TLZ from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens and the effective focal length fx of the optical imaging lens in the first direction can satisfy: 0 <TLZ / fx<1。

[0008] In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the distance TLY from the object-side surface of the first lens to the imaging surface of the optical imaging lens along a direction perpendicular to the optical axis of the first lens can satisfy: 0 <DT11 / TLY<0.5。

[0009] In one embodiment, the refractive index N1 of the first lens, the refractive index N2 of the second lens, and the refractive index N3 of the third lens can satisfy: 0.2 < ((N1+N2) / 2-N3)×10 < 1.2.

[0010] In one embodiment, the dispersion coefficient V3 of the third lens can satisfy: V3>55.

[0011] In one embodiment, the image height ImgHy of the optical imaging lens in the second direction and the distance TLZ from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens can satisfy: 0 <ImgHy / TLZ<1.0。

[0012] In one embodiment, the aperture value Fno of the optical imaging lens in the first direction and the distance TLZ from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens can satisfy: 0.2mm. - 1 <Fno / TLZ<1.0mm -1 .

[0013] In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the effective focal length fx of the optical imaging lens in the first direction can satisfy: 0.1 <R1 / fx<1.0。

[0014] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can satisfy: -1.5 <f1 / f2<-0.5。

[0015] In one embodiment, the radius of curvature R3 of the object side of the second lens and the radius of curvature R4 of the image side of the second lens can satisfy: 0.2 < (R3 - R4) / |(R3 + R4)| < 1.2.

[0016] In one embodiment, the center thickness CT2 of the second lens on the optical axis of the first lens and the center thickness CT1 of the first lens on the optical axis of the first lens can satisfy: 0.2 <CT2 / CT1<1.2。

[0017] In one embodiment, the dispersion coefficient V1 of the first lens and the dispersion coefficient V2 of the second lens can satisfy: V1-V2<30.

[0018] In one embodiment, the object-side surface of the first lens may be convex.

[0019] On the other hand, this application also provides an electronic device that includes the optical imaging lens described in any of the above claims.

[0020] This application adopts a lens architecture including a first lens, a second lens, and a catadioptric lens. By reasonably setting the optical power, material, and surface shape of the lens, a catadioptric periscope telephoto optical imaging lens is provided. This optical imaging lens not only does not lose the principal parameters, but also helps to increase the aperture. At the same time, it also helps to miniaturize the lens module. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0023] Figure 2 The RMS spot diameter of the optical imaging lens of Embodiment 1 is schematically shown in the first quadrant.

[0024] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0025] Figure 4 The RMS spot diameter of the optical imaging lens of Embodiment 2 is schematically shown in the first quadrant.

[0026] Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown;

[0027] Figure 6 The RMS spot diameter of the optical imaging lens of Embodiment 3 is schematically shown in the first quadrant.

[0028] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0029] Figure 8 The RMS spot diameter of the optical imaging lens of Embodiment 4 is schematically shown in the first quadrant.

[0030] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0031] Figure 10The RMS spot diameter of the optical imaging lens of Embodiment 5 is schematically shown in the first quadrant.

[0032] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown; and

[0033] Figure 12 The RMS spot diameter of the optical imaging lens of Embodiment 6 is schematically shown in the first quadrant. Detailed Implementation

[0034] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0035] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0036] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0037] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. In this article, 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.

[0038] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0039] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] The features, principles and other aspects of this application are described in detail below.

[0042] An optical imaging lens according to an exemplary embodiment of this application may include three lenses: a first lens, a second lens, and a third lens. These three lenses may be arranged sequentially from the object side to the image side along a horizontal optical axis, i.e., the optical axis of the first lens. The third lens may be a catadioptric lens and may include four surfaces: an incident reflecting surface, a first reflecting surface, a second reflecting surface, and an exit reflecting surface. Light enters the third lens through the incident reflecting surface, and after reflection by at least a portion of the incident reflecting surface, the first reflecting surface, the second reflecting surface, and the exit reflecting surface, it exits through the exit reflecting surface.

[0043] In an exemplary embodiment, at least one of the incident reflecting surface, the first reflecting surface, the second reflecting surface, and the exit reflecting surface of the third lens may have a non-rotationally symmetric aspherical surface.

[0044] In an exemplary embodiment, light can enter the third lens through the incident reflecting surface, be reflected multiple times within the catadioptric lens, and finally exit through the exit reflecting surface.

[0045] In an exemplary embodiment, light can enter the third lens through, for example, the incident reflecting surface S5. The light can, for example, be incident on the first reflecting surface S6. The first reflecting surface S6 can, for example, perform specular reflection on the incident light. The reflected light can then be incident on the incident reflecting surface S5. The incident reflecting surface S5 can, for example, perform total reflection on the incident light. The reflected light can then be incident on the exit reflecting surface S8. The exit reflecting surface S8 can, for example, also perform total reflection on the incident light. The reflected light can, for example, further be incident on the second reflecting surface S7. The second reflecting surface S7 can, for example, perform specular reflection on the incident light. Finally, the reflected light can, for example, pass through the exit reflecting surface S8 and exit the third lens. For the incident reflecting surface S5, the first reflecting surface S6, the second reflecting surface S7, and the exit reflecting surface S8 of the third lens, reference can be made to Figure 1 as shown.

[0046] The first lens and the second lens are combined together. On the one hand, they contribute to the main optical power of the telephoto system. On the other hand, by using different materials for the two lenses, chromatic aberration of the system can be corrected, reducing the risk of purple fringing in the telephoto system. The third lens is a catadioptric lens mainly composed of four surfaces, and at least one of these four surfaces has non-rotational symmetry. By introducing free-form surfaces, the performance at different positions on the sensor can be ensured.

[0047] In an exemplary embodiment, the object side surface of the first lens can be a convex surface.

[0048] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the condition 0.2 < TLZ / TLY < 1.0, where TLZ is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction, and TLY is the distance from the object side surface of the first lens to the imaging surface along the vertical direction. By controlling the ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction to the distance from the object side surface of the first lens to the imaging surface along the vertical direction within this range, the length and width of the optical path can be effectively controlled, minimizing the optical path in the horizontal direction, thereby effectively controlling the size of the telephoto module. Further, TLZ and TLY can satisfy 0.3 < TLZ / TLY < 0.8. Exemplarily, TLZ can satisfy 5.2 mm < TLZ < 10.4 mm, and TLY can satisfy 10.1 mm < TLY < 23.7 mm.

[0049] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.3 < T3 / TLZ < 0.8, where T3 is the distance from the intersection point of the incident reflection surface of the third lens and the horizontal optical axis to the imaging surface of the optical imaging lens along the horizontal optical axis direction, and TLZ is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction. By controlling the ratio of the distance from the intersection point of the incident reflection surface of the third lens and the horizontal optical axis to the imaging surface of the optical imaging lens along the horizontal optical axis direction to the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction within this range, the height of the third lens in the horizontal direction can be controlled, which is beneficial to reducing the height of the module. At the same time, by reasonably allocating the ratio of the heights of the first lens, the second lens, and the third lens, it is beneficial to the process feasibility of the module. More specifically, T3 and TLZ can satisfy 0.4 < T3 / TLZ < 0.7. Exemplarily, TLZ can satisfy 5.2 mm < TLZ < 10.4 mm.

[0050] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0 < TLZ / fx < 1, where TLZ is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction, and fx is the effective focal length of the optical imaging lens in the first direction, that is, in the X-axis direction. By controlling the ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction to the effective focal length of the optical imaging lens in the first direction, that is, in the X-axis direction, within this range, a shorter height can be achieved, the focal length of the system can be made longer, which is beneficial to the miniaturization of the telephoto module. More specifically, TLZ and fx can satisfy 0.15 < TLZ / fx < 0.8. Exemplarily, TLZ can satisfy 5.2 mm < TLZ < 10.4 mm, and fx can satisfy 13.6 mm < fx < 19.2 mm.

[0051] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0 < DT11 / TLY < 0.5, where DT11 is the maximum effective radius of the object side surface of the first lens, and TLY is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the vertical direction. By controlling the ratio of the maximum effective radius of the object side surface of the first lens to the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the vertical direction within this range, while considering the system height, the system length is also considered, and the system can meet the miniaturization requirements in both directions. More specifically, DT11 and TLY can satisfy 0.1 < DT / TLY < 0.4. Exemplarily, TLY can satisfy 10.1 mm < TLY < 23.7 mm.

[0052] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < ((N1 + N2) / 2 - N3) × 10 < 1.2, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens. By controlling the refractive indices of the first lens, the second lens, and the third lens to satisfy 0.2 < ((N1 + N2) / 2 - N3) × 10 < 1.2, the optical imaging lens can correct the aberration of the system while satisfying the telephoto requirement, ensuring the imaging quality of the system. More specifically, N1, N2, and N3 can satisfy 0.3 < ((N1 + N2) / 2 - N3) × 10 < 1.1.

[0053] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula V3 > 55, where V3 is the dispersion coefficient of the third lens. By controlling the value of the dispersion coefficient of the third lens within this range, on the one hand, the chromatic aberration of the system can be balanced, and on the other hand, it is beneficial to the molding of the third lens.

[0054] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0 < ImgHy / TLZ < 1.0, where ImgHy is the image height of the optical imaging lens in the second direction, i.e., the Y-axis direction, and TLZ is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction. By controlling the ratio of the image height of the optical imaging lens in the second direction, i.e., the Y-axis direction, to the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction within this range, the module can be miniaturized while the image surface is larger. More specifically, ImgHy and TLZ can satisfy 0.1 < ImgHy / TLZ < 0.8. Exemplarily, ImgHy can satisfy 1.8 mm < ImgHy < 2.8 mm, and TLZ can satisfy 5.2 mm < TLZ < 10.4 mm.

[0055] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 mm -1 < Fno / TLZ < 1.0 mm -1 , where Fno is the aperture value of the optical imaging lens in the first direction, i.e., the X-axis direction, and TLZ is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction. By controlling the ratio of the aperture value of the optical imaging lens in the first direction, i.e., the X-axis direction, to the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis direction within this range, the size of the aperture can be controlled. While the module is miniaturized, the aperture can be made larger, thus meeting the shooting requirements in low-light environments. More specifically, Fno and TLZ can satisfy 0.25 mm -1 < Fno / TLZ < 0.85 mm -1Exemplarily, TLZ can satisfy 5.2 mm < TLZ < 10.4 mm, and Fno can satisfy 3.3 < Fno < 4.1.

[0056] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.1 < R1 / fx < 1.0, where R1 is the curvature radius of the object side surface of the first lens, and fx is the effective focal length of the optical imaging lens in the first direction, i.e., the X-axis direction. By controlling the ratio of the curvature radius of the object side surface of the first lens to the effective focal length of the optical imaging lens in the first direction, i.e., the X-axis direction, within this range, the focal length of the system can be controlled while considering the height of the system. More specifically, R1 and fx can satisfy 0.2 < R1 / fx < 0.95. Exemplarily, fx can satisfy 13.6 mm < fx < 19.2 mm.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -1.5 < f1 / f2 < -0.5, where f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the second lens within this range, the optical power of the two lenses is allocated, and it can be ensured that the combined focal length of the first two lenses is larger, thus meeting the purpose of a long focal length. More specifically, f1 and f2 can satisfy -1.3 < f1 / f2 < -0.6. Exemplarily, f1 can satisfy 5.4 mm < f1 < 8.8 mm, and f2 can satisfy -8.91 < f2 < -6.89.

[0058] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < (R3 - R4) / |(R3 + R4)| < 1.2, where R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens. By controlling the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens to satisfy 0.2 < (R3 - R4) / |(R3 + R4)| < 1.2, on the one hand, the optical power of the second lens can be controlled, thereby controlling the focal length of the system; on the other hand, the slope angle of the lens can be controlled, which is beneficial for molding. More specifically, R3 and R4 can satisfy 0.3 < (R3 - R4) / |(R3 + R4)| < 1.0.

[0059] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < CT2 / CT1 < 1.2, where CT2 is the central thickness of the second lens on the horizontal optical axis, and CT1 is the central thickness of the first lens on the horizontal optical axis. By controlling the ratio of the central thickness of the second lens on the horizontal optical axis to the central thickness of the first lens on the horizontal optical axis within this range, on the one hand, the optical power can be distributed, and on the other hand, the thicknesses of the first two lenses can be ensured to be small, ensuring miniaturization of the module. More specifically, CT2 and CT1 can satisfy 0.3 < CT2 / CT1 < 1.0.

[0060] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula V1 - V2 < 30, where V1 is the dispersion coefficient of the first lens, and V2 is the dispersion coefficient of the second lens. By controlling the difference between the dispersion coefficient of the first lens and the dispersion coefficient of the second lens within this range, the chromatic aberration of the system can be corrected, reducing the risk of purple fringing. More specifically, V1 and V2 can satisfy V1 - V2 < 26.

[0061] In an exemplary embodiment, the optical imaging lens of the present application can include at least one aperture stop. The aperture stop can constrain the light path and control the light intensity. The aperture stop can be set at an appropriate position as needed. For example, it can be set between the object side and the first lens, or, for another example, it can be set between the first lens and the second lens. Optionally, the above optical imaging lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0062] The optical imaging lens according to the above embodiment of the present application can adopt a lens architecture including a first lens, a second lens, and a catadioptric lens (third lens). By reasonably setting the optical powers of the first lens and the second lens, as well as the surface shapes of the four surfaces included in the catadioptric lens, etc., a catadioptric telephoto optical imaging lens with characteristics such as miniaturization, long focal length, large aperture, and good shooting performance can be provided.

[0063] In an embodiment of the present application, at least one of the mirror surfaces of the first lens and the second lens can be an aspherical mirror surface, that is, at least one aspherical mirror surface can be included from the object side surface of the first lens to the image side surface of the second lens. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens and the second lens is an aspherical mirror surface. Optionally, both the object side surface and the image side surface of each of the first lens and the second lens are aspherical mirror surfaces.

[0064] However, those skilled in the art will understand that the number of lenses constituting the camera lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although three lenses are described as an example in the embodiments, the camera lens is not limited to including three lenses. If desired, the camera lens may also include other numbers of lenses.

[0065] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0066] Example 1

[0067] The following is for reference Figure 1 and Figure 2 Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown.

[0068] like Figure 1 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: aperture stop STO, first lens E1, second lens E2, third lens (catecholor lens) E3, and filter E4.

[0069] 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 second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8, all of which are free aspherical surfaces (non-rotationally symmetric aspherical surfaces). S5 can be the incident reflection surface, S6 can be the first reflection surface, S7 can be the second reflection surface, and S8 can be the exit reflection surface. The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0070] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0071]

[0072]

[0073] Table 1

[0074] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 and the second lens E2 are both rotationally symmetric aspherical surfaces. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0075]

[0076] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A9, and A1 that can be used for the aspherical mirrors S1 to S4 in Example 1. 10 A 12 A 14 A 16 A 18 and A 20 .

[0077] Face number A4 A6 A8 A10 A12 S1 -2.6265E-02 -2.1392E-03 -1.8477E-04 5.2664E-04 1.3863E-04 S2 4.1429E-02 -7.4921E-03 -4.0931E-05 1.3945E-03 -9.0201E-04 S3 -1.1714E-02 4.4576E-03 -1.2166E-03 5.9596E-04 -4.3486E-04 S4 -1.5535E-02 1.8278E-03 -3.3042E-04 4.1648E-07 -1.7252E-04

[0078] Table 2-1

[0079] Face number A14 A16 A18 A20 S1 -1.4832E-04 -8.7743E-05 5.5569E-06 8.1853E-07 S2 3.1679E-04 -7.1607E-05 2.9245E-05 -1.1377E-05 S3 2.3923E-04 -7.2710E-05 -2.5633E-05 1.1023E-05 S4 7.8053E-05 1.7658E-05 -1.0060E-05 4.8621E-06

[0080] Table 2-2

[0081] In Example 1, the four surfaces S5, S6, S7, and S8 of the third lens (catechoid lens) E3 are non-rotationally symmetric aspherical surfaces. The surface shape of the Q2D freeform surface (SPS Q2D) can be limited by, but is not limited to, the following formula for non-rotationally symmetric aspherical surfaces:

[0082]

[0083] It includes the off-axis conical base surface plus the added Q-free polynomial deviation, where the variables marked with a tilde (~) represent parameters in the off-axis coordinate system.

[0084] in, It represents the total sagitta of a specific coordinate origin on the (lens unit) conical base surface along the direction of the surface normal. The coordinate origin can move within the YZ plane based on the conical base surface.

[0085] This represents the coordinates of a point on the surface in the cylindrical coordinate system, given the off-axis coordinate system.

[0086] Let represent the coordinates of a point on the surface in Cartesian coordinates in an off-axis coordinate system, for a given .

[0087] Let be a variable, representing the distance relative to the normalized radius r in off-axis coordinates. norm The increased radial distance of the aspherical surface off-center express The offset,

[0088] This is the sagittal height of the (lens unit) conical base surface in the direction of the normal at the specific coordinate point as described above.

[0089] This represents the incremental deviation of the sag of the cone base surface at the origin along the surface normal direction.

[0090] The polynomial coefficient tables (all terms - assuming no symmetry) for surfaces S5, S6, S7, and S8 are shown in Tables 3-1, 3-2, 3-3, and 3-4, respectively.

[0091]

[0092] Table 3-1

[0093]

[0094]

[0095] Table 3-2

[0096]

[0097] Table 3-3

[0098]

[0099]

[0100] Table 3-4

[0101] Figure 2 The RMS spot diameter of the optical imaging lens of Embodiment 1 is shown at different image height positions in the first quadrant. Figure 2 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 2Among them, the smallest RMS spot diameter is 0.0021363 mm, the largest RMS spot diameter is 0.0067906 mm, the mean RMS spot diameter is 0.003809 mm, and the standard deviation of the RMS spot diameter is 0.00097634 mm. According to... Figure 2 It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0102] Example 2

[0103] The following is for reference Figure 3 and Figure 4 This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0104] like Figure 3 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: aperture stop STO, first lens E1, second lens E2, third lens (catecholor lens) E3, and filter E4.

[0105] 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 second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8, all of which are free aspherical surfaces (non-rotationally symmetric aspherical surfaces). The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0106] Table 4 shows the basic parameters of the optical imaging lens of Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 5-1 and 5-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S4 in Example 2. 10 A 12 A 14 A 16 A 18 and A 20Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0107]

[0108]

[0109] Table 4

[0110] Face number A4 A6 A8 A10 A12 S1 -2.8892E-02 -2.3531E-03 -2.0324E-04 5.7931E-04 1.5249E-04 S2 4.5572E-02 -8.2414E-03 -4.5024E-05 1.5339E-03 -9.9221E-04 S3 -1.2886E-02 4.9033E-03 -1.3382E-03 6.5555E-04 -4.7834E-04 S4 -1.7089E-02 2.0106E-03 -3.6347E-04 4.5813E-07 -1.8977E-04

[0111] Table 5-1

[0112] Face number A14 A16 A18 A20 S1 -1.6315E-04 -9.6517E-05 6.1126E-06 9.0038E-07 S2 3.4847E-04 -7.8767E-05 3.2170E-05 -1.2514E-05 S3 2.6315E-04 -7.9981E-05 -2.8197E-05 1.2125E-05 S4 8.5859E-05 1.9424E-05 -1.1065E-05 5.3483E-06

[0113] Table 5-2

[0114] In Example 2, the surface shapes of the four non-rotationally symmetric aspherical surfaces S5, S6, S7, and S8 contained in the third lens (catenoscope) E3 can be defined by formula (2) given in Example 1 above. The polynomial coefficient tables (all terms - assuming no symmetry) of surfaces S5, S6, S7, and S8 are shown in Tables 6-1, 6-2, 6-3, and 6-4 below, respectively.

[0115]

[0116] Table 6-1

[0117]

[0118] Table 6-2

[0119]

[0120]

[0121] Table 6-3

[0122]

[0123] Table 6-4

[0124] Figure 4 The RMS spot diameter of the optical imaging lens of Embodiment 2 is shown at different image height positions in the first quadrant. Figure 4 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 4 Among them, the smallest RMS spot diameter is 0.0018029 mm, the largest RMS spot diameter is 0.0067913 mm, the mean RMS spot diameter is 0.0033572 mm, and the standard deviation of the RMS spot diameter is 0.0010223 mm. According to... Figure 4It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0125] Example 3

[0126] The following is for reference Figure 5 and Figure 6 Describes an optical imaging lens according to Embodiment 3 of this application. Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0127] like Figure 5 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: aperture stop STO, first lens E1, second lens E2, third lens (catecholor lens) E3, and filter E4.

[0128] 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 second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8, all of which are free aspherical surfaces (non-rotationally symmetric aspherical surfaces). The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0129] Table 7 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients A4, A6, A8, and A4 that can be used for the aspherical mirrors S1 to S4 in Example 3. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0130]

[0131] Table 7

[0132] Face number A4 A6 A8 A10 A12 S1 -1.9839E-02 -5.8034E-03 8.0657E-04 5.9099E-05 4.5662E-04 S2 7.9287E-02 -1.5139E-02 2.4269E-03 3.7002E-04 -3.8770E-04 S3 -2.9245E-02 8.8580E-03 -3.1231E-03 1.5113E-03 -9.2408E-04 S4 -5.0251E-02 7.9413E-03 -2.7248E-03 8.7797E-04 -9.0022E-04

[0133] Table 8-1

[0134] Face number A14 A16 A18 A20 S1 -2.9929E-04 -3.9862E-05 -9.0668E-05 4.6184E-05 S2 1.4893E-06 9.8614E-05 -7.8515E-05 2.8968E-05 S3 5.3227E-04 -2.6975E-04 1.9774E-04 -1.0792E-04 S4 5.3681E-04 -1.5629E-04 1.8574E-04 -1.0244E-04

[0135] Table 8-2

[0136] In Example 3, the surface shapes of the four non-rotationally symmetric aspherical surfaces S5, S6, S7, and S8 contained in the third lens (catenoscope) E3 can be defined by formula (2) given in Example 1 above. The polynomial coefficient tables (all terms - assuming no symmetry) of surfaces S5, S6, S7, and S8 are shown in Tables 9-1, 9-2, 9-3, and 9-4 below, respectively.

[0137]

[0138]

[0139] Table 9-1

[0140]

[0141] Table 9-2

[0142]

[0143]

[0144] Table 9-3

[0145]

[0146] Table 9-4 Figure 6 The RMS spot diameter of the optical imaging lens of Embodiment 3 is shown at different image height positions in the first quadrant. Figure 6 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 6 Among them, the smallest RMS spot diameter is 0.0018567 mm, the largest RMS spot diameter is 0.0052384 mm, the mean RMS spot diameter is 0.002945 mm, and the standard deviation of the RMS spot diameter is 0.00086845 mm. According to... Figure 6 It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0147] Example 4

[0148] The following is for reference Figure 7 and Figure 8 Describes an optical imaging lens according to Embodiment 4 of this application. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0149] like Figure 7 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: aperture stop STO, first lens E1, second lens E2, third lens (catecholor lens) E3, and filter E4.

[0150] 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 second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8, all of which are free aspherical surfaces (non-rotationally symmetric aspherical surfaces). The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0151] Table 10 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 11-1 and 11-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S4 in Example 4. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0152]

[0153] Table 10

[0154]

[0155]

[0156] Table 11-1

[0157] Face number A14 A16 A18 A20 S1 -2.4487E-04 -3.2615E-05 -7.4183E-05 3.7787E-05 S2 1.2185E-06 8.0684E-05 -6.4239E-05 2.3701E-05 S3 4.3549E-04 -2.2071E-04 1.6179E-04 -8.8298E-05 S4 4.3921E-04 -1.2787E-04 1.5197E-04 -8.3814E-05

[0158] Table 11-2

[0159] In Example 4, the surface shapes of the four non-rotationally symmetric aspherical surfaces S5, S6, S7, and S8 included in the third lens (catenoscope) E3 can be defined by formula (2) given in Example 1 above. The polynomial coefficient tables (all terms - assuming no symmetry) of surfaces S5, S6, S7, and S8 are shown in Tables 12-1, 12-2, 12-3, and 12-4 below, respectively.

[0160]

[0161] Table 12-1

[0162]

[0163]

[0164] Table 12-2

[0165]

[0166] Table 12-3

[0167]

[0168]

[0169] Table 12-4

[0170] Figure 8 The RMS spot diameter of the optical imaging lens of Embodiment 4 is shown at different image height positions in the first quadrant. Figure 8 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 8 Among them, the smallest RMS spot diameter is 0.0023144 mm, the largest RMS spot diameter is 0.0055112 mm, the mean RMS spot diameter is 0.0032937 mm, and the standard deviation of the RMS spot diameter is 0.00089241 mm. According to... Figure 8 It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0171] Example 5

[0172] The following is for reference Figure 9 and Figure 10 Describes an optical imaging lens according to Embodiment 5 of this application. Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0173] like Figure 9As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: a first lens E1, an aperture stop STO, a second lens E2, a third lens (catalytic converter) E3, and a filter E4.

[0174] 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 second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8. Among them, surfaces S5, S6, and S7 are free aspherical surfaces (non-rotationally symmetric aspherical surfaces), and S8 is a spherical surface. The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0175] Table 13 shows the basic parameters of the optical imaging lens of Example 5, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 14-1 and 14-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S4 in Example 5. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0176]

[0177]

[0178] Table 13

[0179] Face number A4 A6 A8 A10 A12 S1 -3.6829E-01 -2.1396E-02 1.2439E-02 4.1254E-03 4.0461E-04 S2 -5.5845E-03 1.3428E-02 9.2570E-03 2.6701E-03 5.9619E-04 S3 8.1027E-01 6.4234E-02 1.7771E-02 5.6371E-03 2.2358E-03 S4 1.7675E-01 8.5626E-04 -5.4647E-04 -3.9221E-04 -6.4544E-05

[0180] Table 14-1

[0181] Face number A14 A16 A18 A20 S1 -9.8668E-05 -8.4422E-05 -5.9183E-05 -4.0740E-07 S2 -2.6257E-06 -7.4043E-05 -3.6329E-05 3.7452E-05 S3 8.6217E-04 3.5870E-04 1.2405E-04 5.8100E-05 S4 1.9023E-05 7.7254E-05 4.6261E-05 2.5904E-05

[0182] Table 14-2

[0183] In Example 5, the surface shapes of the three non-rotationally symmetric aspherical surfaces S5, S6, and S7 included in the third lens (catenoscope) E3 can be defined by formula (2) given in Example 1 above. The polynomial coefficient tables (all terms - assuming no symmetry) of surfaces S5, S6, and S7 are shown in Tables 15-1, 15-2, and 15-3 below, respectively.

[0184]

[0185]

[0186] Table 15-1

[0187]

[0188] Table 15-2

[0189]

[0190]

[0191] Table 15-3

[0192] Figure 10 The RMS spot diameter of the optical imaging lens of Embodiment 5 is shown at different image height positions in the first quadrant. Figure 10 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 10 Among them, the smallest RMS spot diameter is 0.0039856 mm, the largest RMS spot diameter is 0.061346 mm, the mean RMS spot diameter is 0.015198 mm, and the standard deviation of the RMS spot diameter is 0.010321 mm. According to... Figure 10 It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0193] Example 6

[0194] The following is for reference Figure 11 and Figure 12 Describes an optical imaging lens according to Embodiment 6 of this application. Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown.

[0195] like Figure 11 As shown, the optical imaging lens includes, in sequence from the object side to the image side along the horizontal optical axis: a first lens E1, an aperture stop STO, a second lens E2, a third lens (catalytic converter) E3, and a filter E4.

[0196] 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 second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 is a catadioptric lens with four surfaces S5, S6, S7, and S8. Among them, surfaces S5, S6, and S7 are free aspherical surfaces (non-rotationally symmetric aspherical surfaces), and S8 is a spherical surface. The filter E4 has an object-side surface S9 and an image-side surface S10. The optical imaging lens has an imaging surface S11. Light from the object passes sequentially through the surfaces S1 to S4 of the first lens E1 and the second lens E2, enters the third lens E3 through the incident reflection surface S5, and after multiple reflections within the third lens E3 by at least some of the surfaces of the first reflection surface S6, the incident reflection surface S5, the exit reflection surface S8, and the second reflection surface S7, it exits the third lens E3 through the exit reflection surface S8 and passes sequentially through the surfaces S9 and S10 of the filter E4 before finally being imaged on the imaging surface S11.

[0197] Table 16 shows the basic parameters of the optical imaging lens of Example 6, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 17-1 and 17-2 show the higher-order coefficients A4, A6, A8, and A4 that can be used for the aspherical mirrors S1 to S4 in Example 6. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0198]

[0199]

[0200] Table 16

[0201] Face number A4 A6 A8 A10 A12 S1 -4.5013E-01 -2.6150E-02 1.5204E-02 5.0422E-03 4.9453E-04 S2 -6.8254E-03 1.6412E-02 1.1314E-02 3.2635E-03 7.2867E-04 S3 9.9032E-01 7.8509E-02 2.1720E-02 6.8898E-03 2.7327E-03 S4 2.1602E-01 1.0465E-03 -6.6790E-04 -4.7937E-04 -7.8887E-05

[0202] Table 17-1

[0203] Face number A14 A16 A18 A20 S1 -1.2059E-04 -1.0318E-04 -7.2335E-05 -4.9793E-07 S2 -3.2092E-06 -9.0497E-05 -4.4402E-05 4.5775E-05 S3 1.0538E-03 4.3841E-04 1.5162E-04 7.1011E-05 S4 2.3250E-05 9.4421E-05 5.6542E-05 3.1661E-05

[0204] Table 17-2

[0205] In Example 6, the surface shapes of the three non-rotationally symmetric aspherical surfaces S5, S6, and S7 included in the third lens (catenoscope) E3 can be defined by formula (2) given in Example 1 above. The polynomial coefficient tables (all terms - assuming no symmetry) of surfaces S5, S6, and S7 are shown in Tables 18-1, 18-2, and 18-3 below, respectively.

[0206]

[0207]

[0208] Table 18-1

[0209]

[0210] Table 18-2

[0211]

[0212]

[0213] Table 18-3

[0214] Figure 12 The RMS spot diameter of the optical imaging lens of Embodiment 6 is shown at different image height positions in the first quadrant. Figure 12 The relationship between the RMS spot diameter and the true ray image height is shown, where both the X and Y true ray heights are in millimeters (mm). Figure 12 Among them, the smallest RMS spot diameter is 0.0048713 mm, the largest RMS spot diameter is 0.10623 mm, the mean RMS spot diameter is 0.022769 mm, and the standard deviation of the RMS spot diameter is 0.01762 mm. According to... Figure 12 It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0215] Furthermore, in Examples 1 to 6, the distance TLZ from the object side of the first lens to the imaging surface of the optical imaging lens along the horizontal optical axis, the distance TLY from the object side of the first lens to the imaging surface of the optical imaging lens along the vertical direction, the image height ImgHy of the optical imaging lens in the second direction (i.e., the Y-axis direction), the aperture value Fno of the optical imaging lens in the first direction (i.e., the X-axis direction), the effective focal length fx of the optical imaging lens in the X-axis direction, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens are shown in Table 19.

[0216] Parameters / Examples 1 2 3 4 5 6 TLZ 5.50 6.05 6.38 5.22 8.46 10.34 TLY 13.50 10.16 13.47 12.88 19.34 23.67 ImgHy 2.04 2.24 2.25 1.84 2.00 2.79 Fno 3.70 4.07 3.95 3.46 3.36 3.36 fx 17.40 19.14 19.14 15.66 13.65 16.69 f1 7.67 8.44 8.78 7.18 5.48 6.70 f2 -7.6 -8.3 -8.9 -7.27 -6.90 -8.44

[0217] Table 19 shows that each conditional expression in Examples 1 to 6 satisfies the conditions shown in Table 20.

[0218] Conditional / Example 1 2 3 4 5 6 TLZ / TLY 0.41 0.60 0.47 0.41 0.44 0.44 T3 / TLZ 0.54 0.54 0.65 0.65 0.56 0.56 TLZ / fx 0.32 0.32 0.33 0.33 0.62 0.62 DT11 / TLY 0.17 0.23 0.18 0.19 0.12 0.12 ((N1+N2) / 2-N3)×10 0.95 0.95 0.95 0.95 0.35 0.35 V3 56.00 56.00 56.00 56.00 64.20 64.20 ImgHy / TLZ 0.37 0.37 0.35 0.35 0.24 0.27 <![CDATA[Fno / TLZ(mm -1 )]]> 0.67 0.67 0.62 0.66 0.40 0.33 R1 / fx 0.26 0.26 0.25 0.25 0.90 0.90 f1 / f2 -1.02 -1.02 -0.99 -0.99 -0.79 -0.79 (R3-R4) / |(R3+R4)| 0.65 0.65 0.53 0.53 0.45 0.45 CT2 / CT1 0.52 0.52 0.34 0.34 0.76 0.76 V1-V2 4.80 4.80 6.20 6.20 22.40 22.40

[0219] Table 20

[0220] This application also provides an electronic device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. The electronic device can 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 electronic device is equipped with the optical imaging lens described above.

[0221] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, From the object side to the image side, the lenses consist of a first lens, a second lens, and a third lens in that order. The optical imaging lens has three lenses; The first lens has positive optical power and its object side is convex. The second lens has negative optical power; The third lens is a catadioptric lens, comprising an incident reflecting surface, a first reflecting surface, a second reflecting surface, and an exit reflecting surface. Light enters the third lens through the incident reflecting surface, and within the third lens, it is reflected sequentially by the first reflecting surface, the incident reflecting surface, the exit reflecting surface, and the second reflecting surface before exiting through the exit reflecting surface. At least one of the incident reflecting surface, the first reflecting surface, the second reflecting surface, and the exiting reflecting surface has a non-rotationally symmetric aspherical surface; The distance TLZ from the object side of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens satisfies the following condition with respect to the effective focal length fx of the optical imaging lens in the first direction: 0.32≤TLZ / fx≤0.

62.

2. The optical imaging lens according to claim 1, characterized in that, The distance TLZ from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens and the distance TLY from the object-side surface of the first lens to the imaging surface along the direction perpendicular to the optical axis of the first lens satisfy the following: 0.41≤TLZ / TLY≤0.

6.

3. The optical imaging lens according to claim 1, characterized in that, The distance T3 from the intersection of the incident reflecting surface of the third lens and the optical axis of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens, and the distance TLZ from the object surface of the first lens to the imaging surface along the optical axis of the first lens, satisfy the following: 0.54≤T3 / TLZ<0.

7.

4. The optical imaging lens according to claim 1, characterized in that, The maximum effective radius DT11 of the object-side surface of the first lens and the distance TLY from the object-side surface of the first lens to the imaging surface of the optical imaging lens along the direction perpendicular to the optical axis of the first lens satisfy the following: 0.1 <DT11 / TLY≤0.23。 5. The optical imaging lens according to claim 1, characterized in that, The refractive indices N1 of the first lens, N2 of the second lens, and N3 of the third lens satisfy the following: 0.35≤((N1+N2) / 2-N3)×10≤0.

95.

6. The optical imaging lens according to claim 1, characterized in that, The dispersion coefficient V3 of the third lens satisfies: 56≤V3≤64.2。 7. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The image height ImgHy of the optical imaging lens in the second direction and the distance TLZ from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens satisfy the following: 0.24≤ImgHy / TLZ≤0.

37.

8. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The aperture value Fno of the optical imaging lens in the first direction and the distance TLZ from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis of the first lens satisfy the following: 0.33mm -1 ≤Fno / TLZ≤0.67mm -1 。 9. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The radius of curvature R1 of the object-side surface of the first lens and the effective focal length fx of the optical imaging lens in the first direction satisfy the following: 0.25≤R1 / fx≤0.

9.

10. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following: -1.02≤f1 / f2≤-0.

79.

11. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy the following: 0.45≤(R3-R4) / |(R3+R4)|≤0.

65.

12. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The center thickness CT2 of the second lens on the optical axis of the first lens satisfies the following condition: 0.3 <CT2 / CT1≤0.76。 13. The optical imaging lens according to any one of claims 1 to 6, characterized in that, The dispersion coefficient V1 of the first lens and the dispersion coefficient V2 of the second lens satisfy the following: 4.80≤V1-V2≤22.

4.

14. An electronic device, characterized in that, The optical imaging lens comprising any one of claims 1-13.

Images