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US-12625347-B2 - Optical lens, camera module, and electronic device

US12625347B2US 12625347 B2US12625347 B2US 12625347B2US-12625347-B2

Abstract

An optical lens, a camera module, and an electronic device are provided. The optical lens, from an object side to an image side along an optical axis, includes: a first lens element having a positive refractive power, where an object side surface of the first lens element protrudes and an image side surface of the first lens element protrudes; a second lens element having a negative refractive power, where an object side surface of the second lens element protrudes and an image side surface of the second lens element is recessed; and a third lens element having the negative refractive power, where an object side surface of the third lens element is recessed and an image side surface of the third lens element protrudes.

Inventors

  • Sanfu HUANG

Assignees

  • VIVO MOBILE COMMUNICATION CO., LTD.

Dates

Publication Date
20260512
Application Date
20230719
Priority Date
20210120

Claims (20)

  1. 1 . An optical lens, from an object side to an image side along an optical axis, comprising: a first lens element having a positive refractive power, wherein an object side surface of the first lens element protrudes and an image side surface of the first lens element protrudes; a second lens element having a negative refractive power, wherein an object side surface of the second lens element protrudes and an image side surface of the second lens element is recessed; and a third lens element having the negative refractive power, wherein an object side surface of the third lens element is recessed and an image side surface of the third lens element protrudes; wherein Abbe numbers of the first lens element, the second lens element, and the third lens element are V1, V2, and V3 respectively, satisfying: 3.4<V1/V2<3.9, and 0.45<V2/V3<0.55; and an effective focal length of the optical lens is f, and 20 mm<f<25 mm.
  2. 2 . The optical lens according to claim 1 , wherein the object side surface of the first lens element is a spherical surface, a curvature radius of the object side surface is R1, and 0 mm<R1<10 mm.
  3. 3 . The optical lens according to claim 1 , wherein the image side surface of the first lens element is a spherical surface, a curvature radius of the image side surface is R2, and −28 mm<R2<−10 mm; and the object side surface of the second lens element is an aspheric surface, a curvature radius of the object side surface is R3, and 20 mm<R3<50 mm.
  4. 4 . The optical lens according to claim 1 , wherein the image side surface of the second lens element is an aspheric surface, a curvature radius of the image side surface is R4, and 10 mm<R4<25 mm.
  5. 5 . The optical lens according to claim 1 , wherein the object side surface of the third lens element is an aspheric surface, a curvature radius of the object side surface is R5, and −10 mm<R5<−1 mm; and the image side surface of the third lens element is an aspheric surface, a curvature radius of the image side surface is R6, and −13 mm<R6<−2 mm.
  6. 6 . The optical lens according to claim 1 , wherein effective focal lengths of the first lens element, the second lens element, and the third lens element are f1, f2, and f3 respectively, satisfying: 8.0 mm<f1<15 mm; −80 mm<f2<−40 mm; and −30 mm<f3<−15 mm.
  7. 7 . The optical lens according to claim 1 , wherein center thicknesses of the first lens element, the second lens element, and the third lens element are CT1, CT2, and CT3 respectively, satisfying: 1 mm<CT1<3 mm; 1 mm<CT2<4 mm; and 1 mm<CT3<4 mm.
  8. 8 . The optical lens according to claim 1 , further comprising an aperture, wherein the aperture is disposed between the first lens element and the second lens element.
  9. 9 . The optical lens according to claim 1 , further comprising an infrared filter, wherein the infrared filter is disposed on an image side of the third lens element.
  10. 10 . The optical lens according to claim 1 , further comprising a prism, wherein the prism is disposed on the image side of the third lens element and is used to change a direction of light.
  11. 11 . A camera module, wherein the camera module comprises an optical lens, and an image sensor, wherein the image sensor is disposed on an image side of the optical lens, wherein the optical lens is from an object side to the image side along an optical axis comprises: a first lens element having a positive refractive power, wherein an object side surface of the first lens element protrudes and an image side surface of the first lens element protrudes; a second lens element having a negative refractive power, wherein an object side surface of the second lens element protrudes and an image side surface of the second lens element is recessed; and a third lens element having the negative refractive power, wherein an object side surface of the third lens element is recessed and an image side surface of the third lens element protrudes; wherein Abbe numbers of the first lens element, the second lens element, and the third lens element are V1, V2, and V3 respectively, satisfying: 3.4<V1/V2<3.9, and 0.45<V2/V3<0.55; and an effective focal length of the optical lens is f, and 20 mm<f<25 mm.
  12. 12 . The camera module according to claim 11 , wherein the object side surface of the first lens element is a spherical surface, a curvature radius of the object side surface is R1, and 0 mm<R1<10 mm.
  13. 13 . The camera module according to claim 11 , wherein the image side surface of the first lens element is a spherical surface, a curvature radius of the image side surface is R2, and −28 mm<R2<−10 mm; and the object side surface of the second lens element is an aspheric surface, a curvature radius of the object side surface is R3, and 20 mm<R3<50 mm.
  14. 14 . The camera module according to claim 11 , wherein the image side surface of the second lens element is an aspheric surface, a curvature radius of the image side surface is R4, and 10 mm<R4<25 mm.
  15. 15 . The camera module according to claim 11 , wherein the object side surface of the third lens element is an aspheric surface, a curvature radius of the object side surface is R5, and −10 mm<R5<−1 mm; and the image side surface of the third lens element is an aspheric surface, a curvature radius of the image side surface is R6, and −13 mm<R6<−2 mm.
  16. 16 . The camera module according to claim 11 , wherein effective focal lengths of the first lens element, the second lens element, and the third lens element are f1, f2, and f3 respectively, satisfying: 8.0 mm<f1<15 mm; −80 mm<f2<−40 mm; and −30 mm<f3<−15 mm.
  17. 17 . The camera module according to claim 11 , wherein center thicknesses of the first lens element, the second lens element, and the third lens element are CT1, CT2, and CT3 respectively, satisfying: 1 mm<CT1<3 mm; 1 mm<CT2<4 mm; and 1 mm<CT3<4 mm.
  18. 18 . The camera module according to claim 11 , wherein the optical lens further comprises an aperture, wherein the aperture is disposed between the first lens element and the second lens element.
  19. 19 . The camera module according to claim 11 , wherein the optical lens further comprises: an infrared filter, wherein the infrared filter is disposed on an image side of the third lens element; and/or, a prism, wherein the prism is disposed on the image side of the third lens element and is used to change a direction of light.
  20. 20 . An electronic device, comprising the camera module according to claim 11 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of PCT International Application No. PCT/CN2022/071808 filed on Jan. 13, 2022, which claims priority to Chinese Patent Application No. 202110074970.6, filed on Jan. 20, 2021, which are incorporated herein by reference in their entireties. TECHNICAL FIELD This application relates to the field of optical imaging technologies, and in particular, to an optical lens, a camera module, and an electronic device. BACKGROUND Currently, with the continuous progress of smart terminal technologies, a photo shooting function has become an indispensable part of a smart phone, and users have increasingly higher requirements for photo quality. Therefore, requirements for cameras are also increasingly higher. Requirements for photo quality, focusing speed, or a zoom ratio are all becoming increasingly higher. Currently, a quantity of pixels of a main camera of a smart terminal may be more than that of some single-lens reflex cameras, and may be as high as 50 million pixels or even higher. However, there is still a significant gap compared to single-lens reflex cameras in terms of long focus and high magnification zoom lenses. An ordinary configuration of a smart phone's camera usually includes: a main camera with an equivalent focal length of approximately 24 mm to 25 mm; an ultra-wide angle camera with an equivalent focal length of approximately 16 mm to 18 mm; and a long-focus lens with an equivalent focal length of 50 mm to 130 mm. An optical zoom ratio of the camera with the above configuration may only be a maximum of 5.2×, which is significantly insufficient in a shooting scene at a greater distance when higher magnification is required. SUMMARY This application proposes an optical lens, a camera module, and an electronic device, which can provide a small high magnification lens for a mobile terminal, thereby increasing a zoom ratio, and meeting requirements for lens magnification in shooting scenes at a greater distance. To achieve the foregoing objective, the following solution is used in this application. According to a first aspect, an embodiment of this application provides an optical lens. The optical lens, from an object side to an image side along an optical axis, includes: a first lens element having a positive refractive power, where an object side surface of the first lens element protrudes and an image side surface of the first lens element protrudes;a second lens element having a negative refractive power, where an object side surface of the second lens element protrudes and an image side surface of the second lens element is recessed; anda third lens element having the negative refractive power, where an object side surface of the third lens element is recessed and an image side surface of the third lens element protrudes. Abbe numbers of the first lens element, the second lens element, and the third lens element are V1, V2, and V3 respectively, satisfying: 3.4<V⁢1V⁢2<3.9,and 0.45<V⁢2V⁢3<0.55. An effective focal length of the optical lens is f, and f>20 mm. According to a second aspect, an embodiment of this application provides a camera module. The camera module includes the optical lens according to the first aspect and an image sensor. The image sensor is disposed on the image side of the optical lens. According to a third aspect, an embodiment of this application provides an electronic device, including the camera module according to the second aspect. A beneficial effect brought by the technical solution provided in the embodiments of this application at least includes providing an optical lens. The optical lens, from an object side to an image side along an optical axis, includes: a first lens element having a positive refractive power, where an object side surface of the first lens element protrudes and an image side surface of the first lens element protrudes; a second lens element having a negative refractive power, where an object side surface of the second lens element protrudes and an image side surface of the second lens element is recessed; and a third lens element having the negative refractive power, where an object side surface of the third lens element is recessed and an image side surface of the third lens element protrudes. An effective focal length of the optical lens is f, and f>20 mm. A camera module composed of the foregoing optical lens, when combined with a small-sized image sensor, can have an equivalent focal length of more than 200 mm and a zoom ratio of as high as 10×, so that an electronic device equipped with the camera module provided in the embodiments of this application, such as a mobile terminal, meets long focal length requirements for shooting scenes at a greater distance. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of an optical lens according to an embodiment of this application; FIG. 2 is a schematic structural diagram of another optical lens according to an emb