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CN-117471653-B - Optical pick-up lens

CN117471653BCN 117471653 BCN117471653 BCN 117471653BCN-117471653-B

Abstract

The application discloses an optical imaging lens which comprises an imaging lens group, a plurality of interval elements, a lens barrel and a lens barrel, wherein the imaging lens group sequentially comprises a first lens with positive focal power, a second lens with focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from an object side to an image side along an optical axis, the combined focal length of the first lens, the second lens and the third lens is positive focal power, the interval elements comprise a second interval element arranged on the image side of the second lens, and the lens barrel is used for accommodating the imaging lens group and the interval elements, wherein the effective focal length f1 of the first lens, the inner diameter D2s of the object side of the second interval element, the outer diameter D2m of the image side of the second interval element and the air interval T23 of the second lens and the third lens on the optical axis meet 7< f1/d2s+d2m/T23<25.

Inventors

  • CHEN ZEKUN
  • FU LEILEI
  • CHEN QI
  • DAI FUJIAN
  • ZHAO LIEFENG

Assignees

  • 浙江舜宇光学有限公司

Dates

Publication Date
20260505
Application Date
20220707

Claims (9)

  1. 1. An optical imaging lens, comprising: The imaging lens group sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from the object side to the image side along an optical axis, wherein the combined focal length of the first lens, the second lens and the third lens is positive focal power; a plurality of spacing elements including a second spacing element disposed on an image side of the second lens, and A lens barrel for accommodating the imaging lens group and the plurality of spacer elements; The object side surface of the first lens is a convex surface, and the image side surface is a concave surface; The image side surface of the second lens is a concave surface; The image side surface of the seventh lens is a concave surface; the number of lenses with focal power in the optical imaging lens is seven; The effective focal length f1 of the first lens, the inner diameter D2s of the object side surface of the second spacing element, the outer diameter D2m of the image side surface of the second spacing element and the air interval T23 of the second lens and the third lens on the optical axis meet that f1/D2s+D2m/T23 is less than or equal to 17.86 and less than or equal to 23.57.
  2. 2. The optical imaging lens according to claim 1, wherein the plurality of spacer elements further comprises a first spacer element disposed on an image side surface of the first lens, wherein, The inner diameter D1s of the object side surface of the first spacing element, the center thickness CT1 of the first lens on the optical axis, the outer diameter D2m of the image side surface of the second spacing element, and the air spacing T23 of the second lens and the third lens on the optical axis satisfy that D1s/CT1+D2m/T23 is 18.80-24.56.
  3. 3. The optical imaging lens according to claim 1, wherein an outer diameter D0s of an object end surface of the lens barrel toward the object side, a center thickness CT1 of the first lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, an air interval T23 of the second lens and the third lens on the optical axis, an outer diameter D0m of an image end surface of the lens barrel toward the image side, and an air interval T67 of the sixth lens and the seventh lens on the optical axis satisfy 15.56+.d0s/(CT 1+t12 +t23) +d0m/t67+.18.86.
  4. 4. The optical imaging lens according to claim 1, wherein the plurality of spacer elements further comprises a first spacer element disposed on an image side of the first lens and a third spacer element disposed on an image side of the third lens, wherein, The spacing distance EP12 of the first spacing element and the second spacing element along the optical axis direction, the spacing distance EP23 of the second spacing element and the third spacing element along the optical axis direction, the maximum thickness CP2 of the second spacing element along the optical axis direction and the air spacing T34 of the third lens and the fourth lens on the optical axis satisfy that 4.30 is less than or equal to (EP 12+CP2+EP 23)/T34 is less than or equal to 5.37.
  5. 5. The optical imaging lens according to claim 1, wherein an inner diameter D0s of the lens barrel toward the object side, an outer diameter D0s of the lens barrel toward the object side, an air interval T12 of the first lens and the second lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy 21.4< D0 s/(t12+ct2) +d0s/CT6<26.1.
  6. 6. The optical imaging lens according to claim 1, wherein an inner diameter d0m of an image end surface of the lens barrel toward the image side, an inner diameter d0s of an object end surface of the lens barrel toward the object side, an air interval T34 of the third lens and the fourth lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy 13.21 +.d0m-d0s)/(t34+ct4) +. 19.87.
  7. 7. The optical imaging lens according to claim 1, wherein the plurality of spacer elements further includes a fourth spacer element disposed on an image side surface of the fourth lens, wherein a radius of curvature R6 of the image side surface of the third lens, an air space T23 of the second lens and the third lens on the optical axis, an outer diameter D4s of an object side surface of the fourth spacer element, and a center thickness CT4 of the fourth lens on the optical axis satisfy 41.65+.r6/t23+.d4s/CT 4+. 60.40.
  8. 8. The optical imaging lens according to claim 1, wherein the plurality of spacer elements further includes a third spacer element disposed on an image side surface of the third lens, a fourth spacer element disposed on an image side surface of the fourth lens, and a fifth spacer element disposed on an image side surface of the fifth lens, wherein a spacing distance EP34 of the third spacer element and the fourth spacer element in the optical axis direction, an air spacing T34 of the third lens and the fourth lens in the optical axis direction, a maximum thickness CP5 of the fifth spacer element in the optical axis direction, and an air spacing T56 of the fifth lens and the sixth lens in the optical axis satisfy that EP34/t34+cp5/t56<10.0 is not more than 7.25.
  9. 9. The optical imaging lens according to claim 1, wherein the plurality of spacer elements further comprises a sixth spacer element disposed on an image side surface of the sixth lens element, wherein, The inner diameter D6m of the image side surface of the sixth interval element, the outer diameter D6m of the image side surface of the sixth interval element, the curvature radius R11 of the object side surface of the sixth lens and the center thickness CT5 of the fifth lens on the optical axis satisfy that the diameter D6m/R11+D6m/CT5 is not less than 22.47 and not more than 28.54.

Description

Optical pick-up lens Statement of divisional application The application is a divisional application of China patent application with the application number 202210803028.3, which is filed on the 07 th month of 2022 and is named as an optical camera lens. Technical Field The application relates to the field of optical elements, in particular to an optical imaging lens. Background In recent years, with rapid development of technology, mobile phones have become more popular, and meanwhile, mobile phones have gradually developed to have high performance and high quality. The camera shooting technology of the mobile phone is one of important manifestations of high performance of the mobile phone, and the use ratio of a wide-angle lens with a large field angle in the market in camera shooting of the mobile phone is also higher and higher. The wide-angle lens is characterized by having an ultra-large field angle, but stray light of the wide-angle lens has more angles, and the stray light can seriously influence the quality of the lens, which is also a key difficulty that the design of the wide-angle lens and a lens optical system needs to be overcome. Disclosure of Invention An aspect of the present application provides an optical imaging lens including an imaging lens group including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein at least one of the first lens to the fourth lens has negative power, a plurality of spacer elements including a first spacer element disposed on the image side of the first lens and a second spacer element disposed on the image side of the second lens, and a lens barrel for accommodating the imaging lens group and the plurality of spacer elements, wherein a radius of curvature R1 of the object side of the first lens, a radius of curvature R2 of the image side of the first lens, a radius of curvature R3 of the object side of the second lens satisfy R2/R3> R1/R2>0, and an inner diameter D1s of the object side of the first spacer element, a center thickness CT1 of the first lens on the optical axis, an outer diameter D2m of the image side of the second spacer element, and an air space D23/D23 of the third lens satisfy CT 1+d23 on the optical axis. In one embodiment, an outer diameter D0s of an object end surface of the lens barrel facing the object side, a center thickness CT1 of the first lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, an air interval T23 of the second lens and the third lens on the optical axis, an outer diameter D0m of an image end surface of the lens barrel facing the image side, and an air interval T67 of the sixth lens and the seventh lens on the optical axis satisfy 13< D0s/(CT1+T12+T23) +D0m/T67<20. In one embodiment, the plurality of spacer elements further includes a third spacer element disposed on an image side surface of the third lens, wherein a spacing distance EP12 of the first spacer element and the second spacer element in the optical axis direction, a spacing distance EP23 of the second spacer element and the third spacer element in the optical axis direction, a maximum thickness CP2 of the second spacer element in the optical axis direction, and an air spacing T34 of the third lens and the fourth lens on the optical axis satisfy 4< (EP 12+CP2+EP 23)/T34 <6. In one embodiment, the effective focal length f1 of the first lens, the inner diameter D2s of the object side surface of the second spacing element, the outer diameter D2m of the image side surface of the second spacing element, and the air spacing T23 of the second lens and the third lens on the optical axis satisfy 7< f1/d2s+d2m/T23<25. In one embodiment, the inner diameter D0s of the object end surface of the lens barrel facing the object side, the outer diameter D0s of the object end surface of the lens barrel facing the object side, the air interval T12 of the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy 21< D0 s/(T12+CT2) +D0s/CT6<27. In one embodiment, the inner diameter d0m of the image end surface of the lens barrel facing the image side, the inner diameter d0s of the object end surface of the lens barrel facing the object side, the air interval T34 of the third lens and the fourth lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy 12< (d 0m-d0 s)/(T34+CT4) <21. In one embodiment, the plurality of spacing elements further comprises a fourth spacing element disposed on an image side surface of the fourth lens, wherein a radius of curvature R6 of the image side surface of the third lens, an air spacing T23 of the second lens and the third lens on the optical axis, an outer diameter D4s of an object side surfac