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CN-121704035-B - Optical imaging lens

CN121704035BCN 121704035 BCN121704035 BCN 121704035BCN-121704035-B

Abstract

The application provides an optical imaging lens, which comprises a lens barrel, a lens group and a plurality of spacing elements, wherein the lens group is accommodated in the lens barrel, the lens group comprises a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power and a seventh lens with negative optical power, the first lens, the second lens and the third lens are sequentially arranged from an object side to an image side along an optical axis, at least one spacing element is included between any two adjacent lenses in the optical imaging lens, the plurality of spacing elements comprise a sixth spacing element which is arranged on the image side of the sixth lens and is in contact with the image side of the sixth lens, and a seventh spacing element which is arranged on the image side of the seventh lens and is in contact with the image side of the seventh lens, and the optical imaging lens satisfies that R13/T67 is less than or equal to 7.22, 1.60 is less than or equal to 6s/f 6.90 is less than or equal to 1.30.6 s/(d 7m-d7 s) 2.71.

Inventors

  • LIU HAOPENG
  • XU HUWEI
  • YAO ZEJIE
  • WENREN JIANKE
  • DAI FUJIAN

Assignees

  • 浙江舜宇光学有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (16)

  1. 1. The optical imaging lens is characterized by comprising a lens barrel, a lens group and a plurality of interval elements, wherein the lens group and the interval elements are accommodated in the lens barrel, the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power, the first lens is arranged from an object side to an image side along an optical axis, the object side and the image side of the first lens are respectively a convex surface and a concave surface, the object side and the image side of the second lens are respectively a convex surface and a concave surface, the object side and the image side of the third lens are respectively a convex surface and a concave surface, the object side and the image side of the fifth lens are respectively a convex surface and a concave surface, the object side and the image side of the seventh lens are respectively a convex surface and a concave surface; At least one spacing element is arranged between any two adjacent lenses in the optical imaging lens, the plurality of spacing elements comprises a sixth spacing element which is arranged on the image side of the sixth lens and is contacted with the image side of the sixth lens and a seventh spacing element which is arranged on the image side of the seventh lens and is contacted with the image side of the seventh lens, and the optical imaging lens meets the following conditions: 3.15<R13/T67≤7.22; 1.60< CP7/(d 7m-d7 s). Ltoreq.2.71, and 1.30<d6s/f6<1.90; Wherein R13 is a radius of curvature of an object side surface of the seventh lens element, T67 is an air gap between the sixth lens element and the seventh lens element on an optical axis, CP7 is a maximum thickness of the seventh spacer element along the optical axis direction, d7m is an image side inner diameter of the seventh spacer element, d7s is an object side inner diameter of the seventh spacer element, d6s is an object side inner diameter of the sixth spacer element, and f6 is an effective focal length of the sixth lens element.
  2. 2. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a first spacer element disposed on and in contact with an image side of the first lens, the optical imaging lens satisfying: 2.20<R1/EP01<2.70; wherein R1 is a radius of curvature of the object side surface of the first lens, and EP01 is a distance between the object side surface of the lens barrel and the object side surface of the first spacer element in the optical axis direction.
  3. 3. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a second spacer element disposed on and in contact with an image side of the second lens, the optical imaging lens satisfying: 13.99-15.00% (CT1+CT2)/T12, and -8.45≤f2/d2s≤-6.70; Wherein, CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, T12 is the air space between the first lens and the second lens on the optical axis, f2 is the effective focal length of the second lens, and d2s is the object side inner diameter of the second spacer element.
  4. 4. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a first spacer element disposed on and in contact with an image side of the first lens, a second spacer element disposed on and in contact with an image side of the second lens, and a third spacer element disposed on and in contact with an image side of the third lens, the optical imaging lens satisfying: 0.85≤EP23/EP12<1.45; Wherein EP23 is a distance from the image side surface of the second spacer element to the object side surface of the third spacer element in the optical axis direction, and EP12 is a distance from the image side surface of the first spacer element to the object side surface of the second spacer element in the optical axis direction.
  5. 5. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a second spacer element disposed on and in contact with an image side of the second lens, the optical imaging lens satisfying: 7.88≤D2s/T23<9.70; wherein D2s is an outer diameter of an object side surface of the second spacing element, and T23 is an air space between the second lens and the third lens on an optical axis.
  6. 6. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a fourth spacer element disposed on and in contact with an image side of the fourth lens, the optical imaging lens satisfying: 1.80<T34/CP4<2.70; Wherein T34 is an air space between the third lens and the fourth lens on the optical axis, and CP4 is a maximum thickness of the fourth spacer element along the optical axis direction.
  7. 7. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a third spacer element disposed on and in contact with an image side of the third lens and a fourth spacer element disposed on and in contact with an image side of the fourth lens, the optical imaging lens satisfying: 24.24≤f4/EP34≤41.14; wherein f4 is an effective focal length of the fourth lens, and EP34 is a distance between an image side surface of the third spacer element and an object side surface of the fourth spacer element along the optical axis direction.
  8. 8. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a fourth spacer element disposed on and in contact with an image side of the fourth lens, the optical imaging lens satisfying: -3.90<R8/d4s<-2.35; Wherein R8 is the radius of curvature of the image side of the fourth lens element and d4s is the object side inner diameter of the fourth spacer element.
  9. 9. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a fifth spacer element disposed on and in contact with an image side of the fifth lens, the optical imaging lens satisfying: 2.09≤d5s/R11<3.80; Wherein d5s is the object side inner diameter of the fifth spacing element and R11 is the radius of curvature of the object side of the sixth lens.
  10. 10. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a fifth spacer element disposed on and in contact with an image side of the fifth lens, the optical imaging lens satisfying: 1.80≤(EP56+CP6)/CT6<2.40; Where EP56 is the distance between the image side surface of the fifth spacer element and the object side surface of the sixth spacer element along the optical axis, CP6 is the maximum thickness of the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.
  11. 11. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a fifth spacer element disposed on and in contact with an image side of the fifth lens, the optical imaging lens satisfying: -1.40<SAG61/EP56≤-0.88; Wherein SAG61 is a displacement from an intersection point of the object side surface of the sixth lens element and the optical axis to an apex of an optical effective radius of the object side surface of the sixth lens element in the optical axis direction, and EP56 is a distance from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element in the optical axis direction.
  12. 12. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 1.93≤(D6m-D6s)/CP6<3.10; Wherein D6m is an image side outer diameter of the sixth spacer element, D6s is an object side outer diameter of the sixth spacer element, and CP6 is a maximum thickness of the sixth spacer element in the optical axis direction.
  13. 13. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a sixth auxiliary spacer element disposed on and in contact with an image side of the sixth spacer element, the optical imaging lens satisfying: -3.30<EP67/(D7s-D6bm)≤-2.69; Where EP67 is the distance between the image side surface of the sixth spacer element and the object side surface of the seventh spacer element in the optical axis direction, D7s is the object side outer diameter of the seventh spacer element, and D6bm is the image side outer diameter of the sixth auxiliary spacer element.
  14. 14. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 2.80<d0m/DT0s≤3.36; wherein d0m is the inner diameter of the image side surface of the lens barrel, and DT0s is the clear aperture of the object side surface of the lens barrel.
  15. 15. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 1.35<TD/(D0m-D0s)≤1.86; Wherein TD is the distance between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis, D0m is the outer diameter of the image side surface of the lens barrel, and D0s is the outer diameter of the object side surface of the lens barrel.
  16. 16. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 7.22mm≤d0m/ImgH×EPD≤8.00mm; Wherein d0m is the inner diameter of the image side surface of the lens barrel, imgH is half of the diagonal length of the effective pixel area of the imaging surface of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

Description

Optical imaging lens Technical Field The application relates to the technical field of optical imaging, in particular to an optical imaging lens. Background With the rapid iterative upgrade of intelligent electronic devices (such as smart phones, tablet computers, personal computers and the like), the performance requirements of the market on the product camera lenses are increasingly improved. In this context, handset manufacturers continue to increase the size specification of imaging media (i.e., commonly referred to as "bottom"), where "bottom" originally refers to the negative in traditional photography, has evolved into photosensitive chips in the digital age, but this term is still being used today. It is noted that, with the gradual expansion of the effective image surface area of the lens, the phenomena of stray light and ghost images among lenses are greatly developed, which has a significant negative effect on the overall imaging quality of the lens. Aiming at the problem that stray light is easy to occur at the rear end of a large-image-surface lens, some lenses are used for controlling the deflection degree of the last lens in the lens to light rays and balancing the focal power distribution so as to avoid the problem of astigmatism caused by excessive bending of the lenses, but still can not avoid the reflection stray light generated by the light rays at the positions of non-effective diameters of the last two lenses. Disclosure of Invention An advantage of the present application is to provide an optical imaging lens, which can realize an optimized distribution of optical power by adjusting and controlling the deflection degree of each lens to light, and effectively reduce the astigmatism caused by excessive optical bending. The application provides an optical imaging lens, comprising a lens barrel, a lens group and a plurality of spacing elements, wherein the lens group and the spacing elements are accommodated in the lens barrel; the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power, which are sequentially arranged from an object side to an image side along an optical axis, wherein the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the second lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the third lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the fourth lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the sixth lens are respectively a convex surface and a concave surface, and the object side surface and the image side surface of the seventh lens are respectively a convex surface and a concave surface; at least one spacing element is arranged between any two adjacent lenses in the optical imaging lens, the plurality of spacing elements comprises a sixth spacing element which is arranged on the image side of the sixth lens and is contacted with the image side of the sixth lens and a seventh spacing element which is arranged on the image side of the seventh lens and is contacted with the image side of the seventh lens, the optical imaging lens satisfies that R13/T67 is less than or equal to 3.15 and 7.22, CP7/(d 7m-d7 s) is less than or equal to 1.60 and less than or equal to 2.71, and 1.30 d6s/f6 is less than or equal to 1.90, wherein R13 is the curvature radius of the object side of the seventh lens, T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, CP7 is the maximum thickness of the seventh spacing element along the optical axis direction, d7m is the image side inner diameter of the seventh spacer element, d7s is the object side inner diameter of the seventh spacer element, d6s is the object side inner diameter of the sixth spacer element, and f6 is the effective focal length of the sixth lens. In some embodiments of the present application, the plurality of spacer elements further includes a first spacer element disposed on and in contact with an image side of the first lens, the optical imaging lens satisfies 2.20< R1/EP01<2.70, where R1 is a radius of curvature of an object side of the first lens and EP01 is a distance from the object side of the lens barrel to the object side of the first spacer element in an optical axis direction. In some embodiments of the present application, the plurality of spacer elements further comprises a second spacer element disposed on and in contact with an image side of the second lens, the optical imaging lens satisfying 13.99≤Ct1+Ct2