Optical lens and optical fingerprint identification module

Abstract

The application provides an optical lens and an optical fingerprint identification module. The optical lens comprises a lens barrel, a first lens and a second lens, and the maximum height L of the lens barrel, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -1.2mmL / (f1 / f2)<-0.2mm; the curvature radius R2 of the image side surface of the first lens and the curvature radius R3 of the object side surface of the second lens satisfy: -1.0<R2 / R3<0.9; the object side outer diameter D1s of the first bearing part, the object side inner diameter d1s of the first bearing part, the central thickness CT1 of the first lens and the central thickness CT2 of the second lens satisfy: 1.8<(D1s-d1s) / (CT1+CT2)<4.2. The application solves the problem that the optical lens in the prior art is difficult to simultaneously consider small size and lens forming stability.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical lens and an optical fingerprint recognition module. Background Technology

[0002] In recent years, with the rapid development of smart terminal products such as mobile phones and tablets, optical lenses have been gradually applied to various types of products, especially in the field of smartphones. Optical lenses play different roles in phones depending on their functions and needs. For example, optical lenses used for identification in mobile phones are used in various ways. Common screen-off unlocking methods for existing smartphones include numeric unlocking, facial recognition unlocking, and fingerprint unlocking. Among these, facial recognition and fingerprint unlocking offer fast, indirect, and efficient unlocking. Facial recognition unlocking uses the phone's front-facing camera to recognize the user's facial features, thus unlocking the phone. This method does not require the user to enter a password or gesture; simply facing the camera, the system quickly recognizes and unlocks the phone, making it very convenient. Fingerprint unlocking uses the phone's fingerprint sensor to collect the user's fingerprint features and compares them with previously registered fingerprint data to unlock the phone. The advantages of fingerprint unlocking are its simplicity—simply placing the fingerprint on the sensor is enough—and its speed and high security. These two unlocking methods not only unlock the phone quickly but also improve user efficiency and enhance phone security.

[0003] Currently, mobile phones have entered a stage of ultra-thinness, large screens, and full-screen displays. Conventional home buttons and side power buttons with unlocking functions are increasingly inconvenient for one-handed operation. With the design of full-screen phones, convenient unlocking of the screen-off state has become a major highlight of mobile phone design innovation to improve user operability. Therefore, in-display fingerprint unlocking technology has been widely adopted. Regional in-display fingerprint unlocking under full-screen displays can effectively and quickly improve user operability. However, the overall size of the optical lenses currently used for in-display fingerprint recognition is relatively large, which is not conducive to adaptation to ultra-thin electronic products; moreover, compressing the overall size of the optical lens increases the difficulty of molding the lens itself.

[0004] In other words, existing optical lenses suffer from the problem of simultaneously achieving small size and lens forming stability. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and an optical fingerprint recognition module to solve the problem that existing optical lenses have the problem of being small in size and difficult to simultaneously achieve lens forming stability.

[0006] To achieve the above object, according to one aspect of the present invention, an optical lens is provided, which includes a lens barrel and a first lens and a second lens sequentially arranged in the lens barrel from the object side to the image side along the optical axis of the lens barrel. Among them, the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens is greater than 0.5 mm; the optical lens further includes at least one supporting member, and at least one supporting member includes a first supporting member located on the image side of the first lens and partially contacting the image side surface of the first lens; the maximum height of the lens barrel, that is, the height L on the optical axis from the object side end surface of the lens barrel to the image side end surface of the lens barrel, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -1.2 mm < L / (f1 / f2) < -0.2 mm; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: -1.0 < R2 / R3 < 0.9; the outer diameter D1s of the object side of the first supporting member, the inner diameter d1s of the object side of the first supporting member, the central thickness CT1 of the first lens and the central thickness CT2 of the second lens satisfy: 1.8 < (D1s - d1s) / (CT1 + CT2) < 4.2.

[0007] Further, the inner diameter d0s of the object side of the lens barrel, the inner diameter d0m of the image side of the lens barrel and the f-number FNO of the optical lens satisfy: 3.5 < (d0s + d0m) / FNO < 5.0.

[0008] Further, the distance EP01 on the optical axis from the object side end surface of the lens barrel to the object side surface of the first supporting member, the central thickness CT1 of the first lens and the refractive index N1 of the first lens satisfy: 0 mm < (EP01 - CT1) / N1 < 0.5 mm.

[0009] Further, the air gap T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first supporting member satisfy: 8.5 < T12 / CP1 < 22.0.

[0010] Further, the effective semi-aperture DT11 of the object side surface of the first lens, the effective semi-aperture DT21 of the object side surface of the second lens and the inner diameter d1s of the object side of the first supporting member satisfy: 0.5 < (DT11 - DT21) / d1s < 3.5.

[0011] Further, the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens and the inner diameter d1m of the image side of the first supporting member satisfy: 1.5 < (R3 + R4) / d1m < 19.5.

[0012] Further, the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens and the inner diameter d1m of the image side of the first supporting member satisfy: 1.5 < (R3 + R4) / d1m < 3.0.

[0013] Further, the following condition is satisfied among the image-side outer diameter D1m of the first bearing member, the image-side inner diameter d1m of the first bearing member, the refractive index N1 of the first lens, and the refractive index N2 of the second lens: 1.0 < D1m / d1m / (N1 + N2) < 4.0.

[0014] Further, the following condition is satisfied among the distance SAG12 on the optical axis between the intersection of the image-side surface of the first lens on the optical axis and the effective radius vertex of the image-side surface of the first lens, the distance SAG21 on the optical axis between the intersection of the object-side surface of the second lens on the optical axis and the effective radius vertex of the object-side surface of the second lens, and the maximum thickness CP1 of the first bearing member: 6.8 < (SAG12 + SAG21) / CP1 < 24.0.

[0015] Further, the optical lens further includes a second bearing member located on the image side of the second lens and partially contacting the image-side surface of the second lens.

[0016] Further, the following conditions are satisfied: between the effective semi-aperture DT12 of the image-side surface of the first lens and the effective semi-aperture DT21 of the object-side surface of the second lens: 1.5 < DT12 / DT21 < 2.2; between the object-side outer diameter D2s of the second bearing member and the image-side outer diameter D1m of the first bearing member: 0.5 < D2s / D1m < 1.5.

[0017] Further, the following condition is satisfied between the spacing distance EP12 between the first bearing member and the second bearing member and the center thickness CT2 of the second lens: 0.2 < EP12 / CT2 < 1.0.

[0018] Further, the following condition is satisfied among the maximum height of the lens barrel, i.e., the height L on the optical axis from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the distance EP01 on the optical axis from the object-side end face of the lens barrel to the object-side surface of the first bearing member, the spacing distance EP12 between the first bearing member and the second bearing member, the maximum thickness CP2 of the second bearing member, and the air gap T12 between the first lens and the second lens on the optical axis: 0.2 < (L - EP01 - EP12 - CP2) / T12 < 1.6.

[0019] Further, the center of the object-side surface of the first lens changes from a concave surface to a convex surface from the center to the edge, and the following condition is satisfied among the object-side inner diameter d0s of the lens barrel, the distance SAG11 on the optical axis between the intersection of the object-side surface of the first lens on the optical axis and the effective radius vertex of the object-side surface of the first lens, and the distance SAG22 on the optical axis between the intersection of the image-side surface of the second lens on the optical axis and the effective radius vertex of the image-side surface of the second lens: 3.5 < d0s / (SAG11 + |SAG22|) < 5.5.

[0020] Further, a protruding structure is provided at a position on the outer wall of the lens barrel near the object-side end face, and a spiral structure is provided at a position on the outer wall of the lens barrel near the image-side end face. The distance from the position where the protruding structure is farthest from the lens barrel to the outer diameter of the object-side end face of the lens barrel is greater than 3.5 mm.

[0021] According to another aspect of the present invention, an optical lens is provided, which includes a lens barrel, and a first lens and a second lens sequentially arranged in the lens barrel along the optical axis of the lens barrel from the object side to the image side. Among them, the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens is greater than 0.5 mm; the optical lens further includes at least one supporting member, and at least one supporting member includes a first supporting member located on the image side of the first lens and partially contacting the image side surface of the first lens; the maximum height of the lens barrel, that is, the height L on the optical axis from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: -1.2 mm < L / (f1 / f2) < -0.2 mm; the effective semi-aperture DT11 of the object side surface of the first lens, the effective semi-aperture DT21 of the object side surface of the second lens, and the inner diameter d1s of the object side of the first supporting member satisfy: 0.5 < (DT11 - DT21) / d1s < 3.5.

[0022] According to another aspect of the present invention, an optical fingerprint recognition module is provided, which includes an image sensor and the above-mentioned optical lens, and the image sensor is arranged on the image side of the optical lens.

[0023] Applying the technical solution of the present invention, the optical lens includes a lens barrel, and a first lens and a second lens sequentially arranged in the lens barrel along the optical axis of the lens barrel from the object side to the image side. Among them, the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens is greater than 0.5 mm; the optical lens further includes at least one supporting member, and at least one supporting member includes a first supporting member located on the image side of the first lens and partially contacting the image side surface of the first lens; the maximum height of the lens barrel, that is, the height L on the optical axis from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: -1.2 mm < L / (f1 / f2) < -0.2 mm; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: -1.0 < R2 / R3 < 0.9; the outer diameter D1s of the object side of the first supporting member, the inner diameter d1s of the object side of the first supporting member, the central thickness CT1 of the first lens, and the central thickness CT2 of the second lens satisfy: 1.8 < (D1s - d1s) / (CT1 + CT2) < 4.2.

[0024] To ensure the optical lens of this application achieves ultra-wide-angle and miniaturization while maintaining optimal image quality, it is necessary to control the effective half-aperture of the first and second lenses, as well as the ratio of the maximum height of the lens barrel to the focal length of the first and second lenses, within the range of -1.2mm to -0.2mm. To achieve ultra-wide-angle performance, the radial dimension of the first lens is typically larger than that of the second lens, which introduces lens forming issues and subsequent assembly stability problems. Controlling the ratio of the curvature radii of the image-side surface of the first lens to the object-side surface of the second lens helps control the lens surface shape. Simultaneously, the ratio of the difference between the object-side outer and inner diameters of the first support component to the sum of the center thicknesses of the two lenses helps control the overall shape of the first and second lenses and the length of the edge structure regions of the two lenses, ensuring good support between the two lenses and reducing the difficulty of manufacturing and forming them. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the structure of an optical lens in the first state according to Embodiment 1 of the present invention is shown; Figure 2 A schematic diagram of the structure of an optical lens in the second state according to Embodiment 1 of the present invention is shown; Figures 3 to 6 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Embodiment 1 of the present invention are shown respectively. Figure 7 A schematic diagram of the structure of the optical lens in the first state according to Embodiment 2 of the present invention is shown; Figure 8 A schematic diagram of the structure of the optical lens in the second state according to Embodiment 2 of the present invention is shown; Figures 9 to 12 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Embodiment 2 of the present invention are shown respectively. Figure 13 A schematic diagram of the structure of the optical lens in the first state according to Embodiment 3 of the present invention is shown; Figure 14 A schematic diagram of the optical lens in the second state according to Embodiment 3 of the present invention is shown; Figures 15 to 18 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Embodiment 3 of the present invention are shown respectively. Figure 19 A schematic diagram of the structure of the optical lens in the first state according to Embodiment 4 of the present invention is shown; Figure 20 A schematic diagram of the structure of the optical lens in the second state according to Embodiment 4 of the present invention is shown; Figures 21 to 24 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Embodiment 4 of the present invention are shown respectively. Figure 25 A schematic diagram of the structure of an optical fingerprint recognition module according to an optional embodiment of the present invention is shown; Figure 26 A dimensioned diagram of an optical lens according to an alternative embodiment of the present invention is shown; Figure 27 The image shows the spot pattern when the optical lens of the present invention satisfies (DT11-DT21) / d1s=0.2; Figure 28 The image shows the spot pattern when the optical lens of the present invention satisfies (DT11-DT21) / d1s=1.0; Figure 29 The image shows the spot pattern when the optical lens of the present invention satisfies (DT11-DT21) / d1s=4.0.

[0026] The above figures include the following reference numerals: P0, Lens barrel; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P1, First support member; P2, Second support member; 10, Display screen; 20, Filter; 30, Image sensor. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0030] 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.

[0031] 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 drawn strictly to scale.

[0032] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that 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 that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine convexity or concavity. For the incident light side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the emitting light side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0033] To address the challenge of simultaneously achieving small size and stable lens forming in existing optical lenses, this invention provides an optical lens and an optical fingerprint recognition module.

[0034] like Figures 1 to 29As shown, in an optional embodiment of the present application, an optical lens includes a lens barrel, and a first lens and a second lens sequentially arranged in the lens barrel from the object side to the image side along the optical axis of the lens barrel. Among them, the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens is greater than 0.5 mm; the optical lens further includes at least one supporting member, and the at least one supporting member includes a first supporting member located on the image side of the first lens and partially contacting the image side surface of the first lens; the maximum height of the lens barrel, that is, the height L on the optical axis from the object side end face of the lens barrel to the image side end face of the lens barrel, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: -1.2 mm < L / (f1 / f2) < -0.2 mm; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: -1.0 < R2 / R3 < 0.9; the outer diameter D1s of the object side of the first supporting member, the inner diameter d1s of the object side of the first supporting member, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy: 1.8 < (D1s - d1s) / (CT1 + CT2) < 4.2.

[0035] In order to ensure that the optical lens of the present application achieves ultra-wide angle and miniaturization, while ensuring the best imaging quality, it is necessary to control the effective semi-apertures of the first lens and the second lens, and control the ratio of the maximum height of the lens barrel to the ratio of the focal lengths of the first lens and the second lens within the range of -1.2 mm to -0.2 mm. In order for the first lens and the second lens to achieve ultra-wide angle performance, usually the radial size of the first lens is larger than that of the second lens, which will bring problems in lens molding and subsequent assembly stability; by controlling the ratio of the radius of curvature of the image side surface of the first lens and the object side surface of the second lens, it is beneficial to control the lens surface shape; at the same time, the ratio of the difference between the outer diameter and the inner diameter of the object side of the first supporting member to the sum of the center thicknesses of the two lenses is beneficial to control the overall shape of the first lens and the second lens and the length of the edge structure area of the two lenses, ensuring that the two lenses can be well supported, and at the same time reducing the processing and molding difficulty of the two lenses.

[0036] In this embodiment, the object side inner diameter d0s of the lens barrel, the image side inner diameter d0m of the lens barrel, and the f-number FNO of the optical lens satisfy: 3.5 < (d0s + d0m) / FNO < 5.0. On the premise of satisfying the f-number of the optical lens, by controlling this conditional formula, it is possible to effectively ensure the opening range of the lens barrel, the incident light path range and the exit range of the optical lens, and ensure full-field imaging of the optical lens.

[0037] In this embodiment, the distance EP01 on the optical axis from the object-side end face of the lens barrel to the object-side surface of the first bearing member, the central thickness CT1 of the first lens, and the refractive index N1 of the first lens satisfy: 0 mm < (EP01 - CT1) / N1 < 0.5 mm. By controlling this conditional expression, it is beneficial to ensure the processing and molding of the first lens, obtain good processability, and thus obtain good imaging effects.

[0038] In this embodiment, the air gap T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first bearing member satisfy: 8.5 < T12 / CP1 < 22.0. By controlling this conditional expression, the thickness ratio of the first lens can be effectively controlled, the structural stability of the first lens can be enhanced, and the sensitivity of the gap field curvature before and after the first lens can be reduced.

[0039] In this embodiment, the effective semi-aperture DT11 of the object-side surface of the first lens, the effective semi-aperture DT21 of the object-side surface of the second lens, and the object-side inner diameter d1s of the first bearing member satisfy: 0.5 < (DT11 - DT21) / d1s < 3.5. The radial size of the first lens is larger than that of the second lens. By reasonably controlling the ratio of the difference between the effective semi-aperture of the object-side surface of the first lens and the effective semi-aperture of the object-side surface of the second lens to the minimum object-side inner diameter of the first bearing member, the inner diameter of the first bearing member can be reasonably set according to the effective semi-aperture of the lens, ensuring that the first bearing member can effectively block the stray light directly transmitted through the edge of the first lens and improving the imaging quality.

[0040] In this embodiment, the curvature radius R3 of the object-side surface of the second lens, the curvature radius R4 of the image-side surface of the second lens, and the image-side inner diameter d1m of the first bearing member satisfy: 1.5 < (R3 + R4) / d1m < 19.5. By reasonably setting the ratio of the sum of the curvature radii of the object-side surface and the image-side surface of the second lens to the image-side inner diameter of the first bearing member, it helps to balance the aberration of the system. At the same time, it can adjust the interception of the edge stray light by the first bearing member to avoid the stray light from entering the second lens and improve the imaging quality. Preferably, 1.5 < (R3 + R4) / d1m < 3.0.

[0041] In this embodiment, the image-side outer diameter D1m of the first bearing member, the image-side inner diameter d1m of the first bearing member, the refractive index N1 of the first lens, and the refractive index N2 of the second lens satisfy: 1.0 < D1m / d1m / (N1 + N2) < 4.0. By controlling this conditional expression, the refractive indices of the first lens and the second lens can be controlled, thereby controlling the deflection angle of the light after passing through the two lenses, controlling the light hitting the edge after refraction. The reasonable setting of the inner and outer diameters of the first bearing member can effectively intercept the stray light transmitted through the edge structure part and the effective diameter edge part of the first lens, improve the imaging quality, and is beneficial to the image recognition and analysis of fingerprints by the optical lens.

[0042] In this embodiment, the distance SAG12 on the optical axis between the intersection of the image side surface of the first lens on the optical axis and the vertex of the effective radius of the image side surface of the first lens, the distance SAG21 on the optical axis between the intersection of the object side surface of the second lens on the optical axis and the vertex of the effective radius of the object side surface of the second lens, and the maximum thickness CP1 of the first bearing member satisfy: 6.8 < (SAG12 + SAG21) / CP1 < 24.0. By controlling this conditional expression, it is beneficial to control the overall surface shape of the two lenses, while ensuring the bearing contact between the first lens and the second lens, enabling the force to be evenly transmitted, and reducing the variation in the force received at the centers of the first lens and the second lens.

[0043] In this embodiment, the optical lens further includes a second bearing member located on the image side of the second lens and partially contacting the image side surface of the second lens. The second bearing member will be cured in配合 with glue and is used to fix the first lens, the first bearing member, and the second lens, enhancing the stability of the assembled optical lens and maintaining good optical imaging performance.

[0044] In this embodiment, the effective semi-aperture DT12 of the image side surface of the first lens and the effective semi-aperture DT21 of the object side surface of the second lens satisfy: 1.5 < DT12 / DT21 < 2.2; the outer diameter D2s on the object side of the second bearing member and the outer diameter D1m on the image side of the first bearing member satisfy: 0.5 < D2s / D1m < 1.5. By controlling this conditional expression, the deformation of the first bearing member caused by temperature changes can be effectively reduced, and it is also beneficial for identifying each component during assembly and improving the assembly stability.

[0045] In this embodiment, the spacing distance EP12 between the first bearing member and the second bearing member and the central thickness CT2 of the second lens satisfy: 0.2 < EP12 / CT2 < 1.0. By controlling this conditional expression, it is beneficial to control the ratio of the thickness of the edge structure region to the central thickness of the second lens, ensuring the machinability of the second lens, facilitating the shaping of the second lens, and thus obtaining good imaging effects.

[0046] In this embodiment, the maximum height of the lens barrel, that is, the height L on the optical axis from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the distance EP01 on the optical axis from the object-side end face of the lens barrel to the object-side face of the first bearing member, the spacing distance EP12 between the first bearing member and the second bearing member, and the maximum thickness CP2 of the second bearing member and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 0.2 < (L - EP01 - EP12 - CP2) / T12 < 1.6. By controlling this conditional expression, it is possible to effectively control the lenses in the optical lens from protruding beyond the object-side end face and the image-side end face of the lens barrel, effectively protecting the appearance of the lenses from being damaged by contact. At the same time, the air gap between the first lens and the second lens on the optical axis is reasonably allocated, which is beneficial to improving the assembly stability of the optical lens.

[0047] In this embodiment, the center to the edge of the object-side face of the first lens changes from a concave surface to a convex surface. The object-side inner diameter d0s of the lens barrel, the distance SAG11 on the optical axis between the intersection point of the object-side face of the first lens on the optical axis and the vertex of the effective radius of the object-side face of the first lens, and the distance SAG22 on the optical axis between the intersection point of the image-side face of the second lens on the optical axis and the vertex of the effective radius of the image-side face of the second lens satisfy: 3.5 < d0s / (SAG11 + |SAG22|) < 5.5. By controlling this conditional expression, the surface shape of the object-side face of the first lens changing from concave to convex from the center to the periphery is beneficial to the refraction of light. The combination of controlling the object-side face of the first lens and the image-side face of the second lens with the object-side inner diameter of the lens barrel can control the object-side face of the lens from forming a large-bellied lens, which is beneficial to lens forming and reducing the size of the optical lens.

[0048] In this embodiment, a protruding structure is provided at a position on the outer wall of the lens barrel close to the object-side end face, and a spiral structure is provided at a position on the outer wall of the lens barrel close to the image-side end face. The distance from the position where the protruding structure is farthest from the lens barrel to the outer diameter of the object-side end face of the lens barrel is greater than 3.5 mm. The protruding structure is a structure for cooperating with the subsequent fixing of the optical lens in the optical fingerprint recognition module; the spiral structure is a lens barrel thread for subsequent automatic focusing during fingerprint recognition shooting.

[0049] As Figures 1 to 29As shown, in another optional embodiment of the present application, the optical lens includes a lens barrel, and a first lens and a second lens sequentially arranged in the lens barrel along the optical axis of the lens barrel from the object side to the image side. Among them, the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens is greater than 0.5 mm; the optical lens further includes at least one supporting member, and the at least one supporting member includes a first supporting member located on the image side of the first lens and in partial contact with the image side surface of the first lens; the maximum height of the lens barrel, that is, the height L on the optical axis from the object side end surface of the lens barrel to the image side end surface of the lens barrel, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -1.2 mm < L / (f1 / f2) < -0.2 mm; the effective semi-aperture DT11 of the object side surface of the first lens, the effective semi-aperture DT21 of the object side surface of the second lens and the inner diameter d1s of the object side of the first supporting member satisfy: 0.5 < (DT11 - DT21) / d1s < 3.5.

[0050] By reasonably restricting the ratio of the effective semi-apertures of the first lens and the second lens, the maximum height of the lens barrel to the focal lengths of the first lens and the second lens, it is possible to achieve wide-angle performance and optimal imaging quality on the premise of ensuring miniaturization of the optical lens. In order to achieve wide-angle performance, the radial size of the first lens is usually larger than that of the second lens. In this way, light is easily refracted and hits the edge structure area of the lens, resulting in stray light on the two lenses, thus bringing the problem of stray light; reasonably controlling the ratio of the difference between the effective semi-aperture of the object side surface of the first lens and the effective semi-aperture of the object side surface of the second lens to the minimum inner diameter of the object side of the first supporting member can reasonably set the inner diameter of the first supporting member according to the effective semi-aperture of the lens, ensuring that the first supporting member can effectively block the stray light directly transmitted through the edge of the first lens and improve the imaging quality.

[0051] In addition, as Figures 27 to 29 shown, when the half of the maximum field angle of the optical lens Semi-FOV = 59.82°, the spot diagrams of the optical lens when (DT11 - DT21) / d1s = 0.2, (DT11 - DT21) / d1s = 1.0, and (DT11 - DT21) / d1s = 4.0 are respectively shown. Figure 27 The spot diagram showing that the optical lens satisfies (DT11 - DT21) / d1s = 0.2 is Figure 28 The spot diagram showing that the optical lens satisfies (DT11 - DT21) / d1s = 1.0 is Figure 29 The spot diagram showing that the optical lens satisfies (DT11 - DT21) / d1s = 4.0 is. As can be seen from Figures 27 to 29 it can be seen that Figure 27 , Figure 29 the spot diagrams shown in Figure 28Compared to the light spot pattern shown, the light spot has stronger energy and a wider range. Therefore, the stray light improvement effect is poor when (DT11-DT21) / d1s=0.2 and (DT11-DT21) / d1s=4.0, which does not meet the requirements. The stray light improvement effect is better when (DT11-DT21) / d1s=1.0. Therefore, this application constrains (DT11-DT21) / d1s to be greater than 0.5 and less than 3.5, which is beneficial to improve stray light and enhance image quality.

[0052] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0053] like Figure 25 As shown, this application also provides an optical fingerprint recognition module, including an image sensor 30 and the aforementioned optical lens. The image sensor 30 is disposed on the image side of the optical lens. The image sensor 30 is used to convert the recognized optical signal into an electrical signal for information transmission. The optical fingerprint recognition module also includes a display screen 10 and a filter 20. The filter 20 is located between the second lens and the image sensor 30, and the display screen 10 is located on the object side of the first lens.

[0054] Optionally, the aforementioned optical lens may also include protective glass for protecting the photosensitive element located on the imaging plane.

[0055] The optical lens in this application may employ multiple lenses, such as the two lenses mentioned above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0056] However, those skilled in the art will understand that the number of lenses constituting the optical 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 two lenses are described as an example in the embodiments, the optical lens is not limited to including two lenses. If necessary, the optical lens may also include other numbers of lenses.

[0057] Figure 26The accompanying diagrams show the labeled parameters of the optical lens of this application, including D1m, D1s, d0s, d1s, d0m, D2s, d0m, EP01, EP12, CP1, and CP2, to clearly and intuitively understand the meaning of these parameters. For the sake of clarity regarding the optical lens and its specific surface shape, these parameters will not be shown in the accompanying drawings during the subsequent description of specific embodiments.

[0058] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0059] It should be noted that in the following embodiments, there are a first state and a second state. In the first state and the second state of the same embodiment, the parameters such as the radius of curvature, center thickness, and the spacing and higher-order coefficients of the first and second lenses of the optical lens are the same. However, the parameters such as the inner and outer diameters of the lens barrel and each supporting component, as well as the shape of some lenses, are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0060] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 4, is applicable to all implementation methods of this application.

[0061] Example 1

[0062] like Figures 1 to 6 As shown, the optical lens of Embodiment 1 is described. Figure 1 A schematic diagram of the optical lens in the first embodiment is shown. Figure 2 A schematic diagram of the optical lens of Embodiment 1 in its second state is shown.

[0063] like Figure 1 and Figure 2 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first support P1, a second lens E2, and a second support P2.

[0064] like Figure 1 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first support member P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The second support member P2 abuts against the inner wall surface of the lens barrel P0 and the image-side surface S4 of the second lens.

[0065] like Figure 2 As shown, in the second state, the bearing and contact method of each bearing component of the optical lens is the same as in the first state. Please refer to the relevant description in the first state, which will not be repeated here.

[0066] In summary, the structural parameters of the optical lens in Embodiment 1 under the first state 1-1 and the second state 1-2 are shown in Table 1. (Unit: mm)

[0067] Table 1

[0068] In Embodiment 1, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex.

[0069] In Example 1, the semi-FOV (half of the maximum field of view) of the optical lens is 59.82, the aperture number (Fno) of the optical lens is -4.41, the total effective focal length (f) of the optical lens is 0.45mm, the effective focal length (f1) of the first lens is -1.98mm, and the effective focal length (f2) of the second lens is 0.59mm.

[0070] Table 2 shows the basic structural parameters of the optical lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0071]

[0072] Table 2

[0073] In Embodiment 1, both the object-side surface and the image-side surface of the first lens E1 and the second lens E2 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula: Formula (1) Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, 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. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical mirror S1-S4 in Example 1.

[0074]

[0075] Table 3

[0076] Figure 3 The on-axis chromatic aberration curve of the optical lens of Embodiment 1 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical lens. Figure 4 The astigmatism curve of the optical lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 5 The distortion curve of the optical lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 6 The magnification chromatic aberration curve of the optical lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0077] according to Figures 3 to 6 As can be seen, the optical lens given in Example 1 can achieve good imaging quality.

[0078] Example 2

[0079] like Figures 7 to 12 As shown, the optical lens of Embodiment 2 is described. Figure 7 A schematic diagram of the optical lens in the first state of Embodiment 2 is shown. Figure 8 A schematic diagram of the optical lens of Embodiment 2 in its second state is shown.

[0080] like Figure 7 and Figure 8 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first support P1, a second lens E2, and a second support P2.

[0081] like Figure 7 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first support member P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The second support member P2 abuts against the inner wall surface of the lens barrel P0 and the image-side surface S4 of the second lens.

[0082] like Figure 8 As shown, in the second state, the bearing and contact method of each bearing component of the optical lens is the same as in the first state. Please refer to the relevant description in the first state, which will not be repeated here.

[0083] In summary, the structural parameters of the optical lens in Embodiment 2 under the first state 2-1 and the second state 2-2 are shown in Table 4. (Unit: mm)

[0084] Table 4

[0085] In Embodiment 2, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex.

[0086] In Example 2, the semi-FOV (half of the maximum field of view) of the optical lens is 59.91, the aperture number (Fno) of the optical lens is -4.94, the total effective focal length (f) of the optical lens is 0.45mm, the effective focal length (f1) of the first lens is -2.22mm, and the effective focal length (f2) of the second lens is 0.60mm.

[0087] Table 5 shows the basic structural parameters of the optical lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0088]

[0089] Table 5

[0090] Table 6 shows the polynomial coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0091]

[0092] Table 6

[0093] Figure 9 The on-axis chromatic aberration curve of the optical lens of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 10 The astigmatism curve of the optical lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 11 The distortion curve of the optical lens in Embodiment 2 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 12 The magnification chromatic aberration curve of the optical lens of Embodiment 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0094] according to Figures 9 to 12 It can be seen that the optical lens given in Example 2 can achieve good imaging quality.

[0095] Example 3

[0096] like Figures 13 to 18 As shown, the optical lens of Embodiment 3 is described. Figure 13 A schematic diagram of the optical lens in the first state of Embodiment 3 is shown. Figure 14 A schematic diagram of the optical lens of Embodiment 3 in its second state is shown.

[0097] like Figure 13 and Figure 14 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first support P1, a second lens E2, and a second support P2.

[0098] like Figure 13 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first support member P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The second support member P2 abuts against the inner wall surface of the lens barrel P0 and the image-side surface S4 of the second lens.

[0099] like Figure 14 As shown, in the second state, the bearing and contact method of each bearing component of the optical lens is the same as in the first state. Please refer to the relevant description in the first state, which will not be repeated here.

[0100] In summary, the structural parameters of the optical lens in Embodiment 3 under the first state 3-1 and the second state 3-2 are shown in Table 7. (Unit: mm)

[0101] Table 7

[0102] In Embodiment 3, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex.

[0103] In Example 3, the semi-FOV (half of the maximum field of view) of the optical lens is 51.55, the aperture number (Fno) of the optical lens is -3.55, the total effective focal length (f) of the optical lens is 0.41mm, the effective focal length (f1) of the first lens is -1.44mm, and the effective focal length (f2) of the second lens is 0.56mm.

[0104] Table 8 shows the basic structural parameters of the optical lens in Embodiment 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0105]

[0106] Table 8

[0107] Table 9 shows the polynomial coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0108]

[0109] Table 9

[0110] Figure 15 The on-axis chromatic aberration curve of the optical lens of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 16The astigmatism curve of the optical lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 17 The distortion curve of the optical lens in Embodiment 3 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 18 The magnification chromatic aberration curve of the optical lens of Embodiment 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0111] according to Figures 15 to 18 It can be seen that the optical lens given in Example 3 can achieve good imaging quality.

[0112] Example 4

[0113] like Figures 19 to 24 As shown, the optical lens of Embodiment 4 is described. Figure 19 A schematic diagram of the optical lens in the first state of embodiment four is shown. Figure 20 A schematic diagram of the optical lens in the second state of Embodiment 4 is shown.

[0114] like Figure 19 and Figure 20 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0: a first lens E1, a first support P1, a second lens E2, and a second support P2.

[0115] like Figure 19 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first support member P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The second support member P2 abuts against the inner wall surface of the lens barrel P0 and the image-side surface S4 of the second lens.

[0116] like Figure 20 As shown, in the second state, the bearing and contact method of each bearing component of the optical lens is the same as in the first state. Please refer to the relevant description in the first state, which will not be repeated here.

[0117] In summary, the structural parameters of the optical lens in Embodiment 4 under the first state 4-1 and the second state 4-2 are shown in Table 10. (Unit: mm)

[0118] Table 10

[0119] In Embodiment 4, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex.

[0120] In Example 4, the semi-FOV (half of the maximum field of view) of the optical lens is 64.84, the aperture number (Fno) of the optical lens is -2.40, the total effective focal length (f) of the optical lens is 0.32mm, the effective focal length (f1) of the first lens is -0.76mm, and the effective focal length (f2) of the second lens is 0.48mm.

[0121] Table 11 shows the basic structural parameters of the optical lens in Embodiment 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0122]

[0123] Table 11

[0124] Table 12 shows the polynomial coefficients that can be used for each aspherical mirror in Embodiment 4, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0125]

[0126] Table 12

[0127] Figure 21 The on-axis chromatic aberration curve of the optical lens of Embodiment 4 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical lens. Figure 22 The astigmatism curves of the optical lens of Embodiment 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 23 The distortion curve of the optical lens in Embodiment 4 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 24 The magnification chromatic aberration curve of the optical lens in Embodiment 4 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0128] according to Figures 21 to 24 It can be seen that the optical lens given in Example 4 can achieve good imaging quality.

[0129] In summary, Examples 1 to 4 satisfy the relationships shown in Table 13.

[0130]

[0131] Table 13

[0132] It should be noted that in Table 13, 1-1 represents the optical lens in the first embodiment in the first state, 1-2 represents the optical lens in the first embodiment in the second state, 2-1 represents the optical lens in the second embodiment in the first state, 2-2 represents the optical lens in the second embodiment in the second state, 3-1 represents the optical lens in the third embodiment in the first state, 3-2 represents the optical lens in the third embodiment in the second state, 4-1 represents the optical lens in the fourth embodiment in the first state, and 4-2 represents the optical lens in the fourth embodiment in the second state.

[0133] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0134] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0135] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0136] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The lens includes a lens barrel and a first lens and a second lens arranged sequentially from the object side to the image side along the optical axis of the lens barrel. Wherein, the difference between the effective half-aperture of the object side of the first lens and the effective half-aperture of the object side of the second lens is greater than 0.5 mm and less than or equal to 0.80 mm; the optical lens further includes at least one support member, the at least one support member including a first support member located on the image side of the first lens and partially in contact with the image side of the first lens. The optical lens has a total of two lenses with optical power; the first lens has negative optical power and the second lens has positive optical power; the object-side surface of the first lens is concave; the object-side surface of the second lens is convex and the image-side surface of the second lens is convex. The maximum height of the lens barrel, i.e. the height L from the object-side end face of the lens barrel to the image-side end face of the lens barrel on the optical axis, and the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following: -1.04mm≤L / (f1 / f2)≤-0.44mm; The radius of curvature R2 of the image side of the first lens and the radius of curvature R3 of the object side of the second lens satisfy the following condition: -0.82≤R2 / R3≤0.77; The outer diameter D1s on the object side of the first bearing member, the inner diameter d1s on the object side of the first bearing member, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy the following: 2.01≤(D1s-d1s) / (CT1+CT2)≤3.92; The effective half-aperture DT11 of the object side of the first lens, the effective half-aperture DT21 of the object side of the second lens, and the object side inner diameter d1s of the first bearing member satisfy the following condition: 0.90≤(DT11-DT21) / d1s≤3.

23.

2. The optical lens according to claim 1, characterized in that, The object-side inner diameter d0s of the lens barrel, the image-side inner diameter d0m of the lens barrel, and the aperture number FNO of the optical lens satisfy the following relationship: 3.94≤(d0s+d0m) / FNO≤4.

70.

3. The optical lens according to claim 1, characterized in that, The distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first support member on the optical axis, the center thickness CT1 of the first lens and the refractive index N1 of the first lens satisfy the following: 0.07mm≤(EP01-CT1) / N1≤0.28mm.

4. The optical lens according to claim 1, characterized in that, The air gap T12 between the first lens and the second lens on the optical axis satisfies the following condition with respect to the maximum thickness CP1 of the first support member: 8.94≤T12 / CP1≤21.

78.

5. The optical lens according to claim 1, characterized in that, The radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, and the inner diameter d1m of the image side of the first support member satisfy the following condition: 1.76≤(R3+R4) / d1m≤19.

24.

6. The optical lens according to claim 1, characterized in that, The image-side outer diameter D1m of the first support member, the image-side inner diameter d1m of the first support member, the refractive index N1 of the first lens and the refractive index N2 of the second lens satisfy the following: 1.28≤D1m / d1m / (N1+N2)≤3.

82.

7. The optical lens according to any one of claims 1 to 6, characterized in that, The distance SAG12 between the intersection of the image-side surface of the first lens and the effective radius vertex of the image-side surface of the first lens on the optical axis, and the distance SAG21 between the intersection of the object-side surface of the second lens and the effective radius vertex of the object-side surface of the second lens on the optical axis, satisfy the following condition with the maximum thickness CP1 of the first support member: 7.11≤(SAG12+ SAG21) / CP1≤26.

11.

8. The optical lens according to claim 1, characterized in that, The optical lens also includes a second support member located on the image side of the second lens and in contact with the image side surface of the second lens.

9. The optical lens according to claim 8, characterized in that, The effective half-aperture DT12 of the image side of the first lens and the effective half-aperture DT21 of the object side of the second lens satisfy the following condition: 1.61≤DT12 / DT21≤2.06; The outer diameter D2s on the object side of the second support member and the outer diameter D1m on the image side of the first support member satisfy the following condition: 0.82≤D2s / D1m≤1.

17.

10. The optical lens according to claim 8, characterized in that, The interval EP12 between the first support member and the second support member satisfies the following condition with respect to the center thickness CT2 of the second lens: 0.41≤EP12 / CT2≤0.

80.

11. The optical lens according to claim 8, characterized in that, The maximum height of the lens barrel, i.e., the height L from the object-side end face of the lens barrel to the image-side end face of the lens barrel on the optical axis, the distance EP01 from the object-side end face of the lens barrel to the object-side surface of the first support member on the optical axis, the interval distance EP12 between the first support member and the second support member, the maximum thickness CP2 of the second support member, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following condition: 0.52≤(L-EP01-EP12-CP2) / T12≤1.

47.

12. The optical lens according to any one of claims 1-6 and 10-11, characterized in that, The object-side surface of the first lens changes from concave to convex from its center to its edge. The object-side inner diameter d0s of the lens barrel, the distance SAG11 between the intersection of the object-side surface of the first lens and the vertex of the effective radius of the object-side surface of the first lens on the optical axis, and the distance SAG22 between the intersection of the image-side surface of the second lens and the vertex of the effective radius of the image-side surface of the second lens on the optical axis satisfy the following condition: 4.08≤d0s / (SAG11+|SAG22|)≤5.

38.

13. The optical lens according to any one of claims 1-6 and 10-11, characterized in that, The outer wall of the lens barrel has a protruding structure near the object-side end face, and the outer wall of the lens barrel has a spiral structure near the image-side end face. The distance from the point furthest from the protruding structure to the outer diameter of the object-side end face of the lens barrel is greater than 3.5 mm.

14. An optical fingerprint recognition module, characterized in that, It includes an image sensor and an optical lens according to any one of claims 1 to 13, wherein the image sensor is disposed on the image side of the optical lens.

Images