Optical imaging lens
By employing an eight-element lens architecture and lens power design, combined with optimized spacing elements, the issues of ultra-thinness and image quality in high-end lenses have been resolved, resulting in a high-performance optical imaging lens suitable for high-end smartphones.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG SUNNY OPTICAL CO LTD
- Filing Date
- 2022-05-13
- Publication Date
- 2026-06-12
AI Technical Summary
Existing high-end imaging lenses suffer from problems such as difficulty in miniaturization and ultra-thinning, stray light, ghosting, low performance yield, poor assembly stability, and poor lens reliability, which affect the lens's imaging quality and structural stability.
It adopts an eight-element lens architecture, rationally matches the optical power and surface shape of the lenses, uses meniscus lenses and lenses with positive and negative phase difference optical power, and combines the rational setting of the spacer elements. By controlling the geometric parameters of the lens barrel and lenses, the lens structure is optimized to achieve ultra-thinness and high imaging quality.
It achieves ultra-thin lens and large image plane design, improves processing feasibility, assembly stability and reliability, reduces stray light, improves image quality and performance yield, and meets the application requirements of high-end smartphones.
Smart Images
Figure CN116577904B_ABST
Abstract
Claims
1. Optical imaging lenses, including: The lens barrel and the lens assembly and at least seven spacer elements housed within the lens barrel are characterized in that, The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side. At least one of the first to fourth lenses is a meniscus lens. The seventh and eighth lenses have opposite optical powers. The distance from the center of the effective diameter portion of the object side of the eighth lens to the rear end face of the lens barrel along the optical axis is less than the distance from the edge of the effective diameter portion of the object side of the eighth lens to the rear end face of the lens barrel along the optical axis. The optical imaging lens satisfies: 4.80≤(d0m+D0m) / L+TD / f≤5.29, Wherein, d0m is the inner diameter of the end face closest to the imaging side of the lens barrel, D0m is the outer diameter of the end face closest to the imaging side of the lens barrel, L is the distance from the end face closest to the subject to the end face closest to the imaging side of the lens barrel, TD is the distance from the object side of the first lens to the image side of the eighth lens along the optical axis, and f is the effective focal length of the optical imaging lens. The optical imaging lens contains eight lenses with optical power. The first lens has positive optical power, and its object side is convex and its image side is concave. The second lens has positive optical power and its object-side surface is convex. The third lens has negative optical power and its image-side surface is concave. The fourth lens has positive optical power, with its object side being concave and its image side being convex. The fifth lens has negative optical power, and its object side is convex while its image side is concave. The sixth lens has positive optical power, with its object side being concave and its image side being convex. The seventh lens has positive optical power and its object-side surface is convex. The eighth lens has negative optical power, with its object side being concave and its image side being convex.
2. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include a first spacer element disposed on the image side of the first lens and in partial contact with the first lens. The radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, the inner diameter d1s of the object side of the first spacer element, and the inner diameter d1m of the image side of the first spacer element satisfy the following: 2.63≤(R1+R2) / (R2-R1)×(d1s / d1m)≤3.
59.
3. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include an i-th spacer element disposed on the image side of the i-th lens and in partial contact with the i-th lens, wherein the optical imaging lens satisfies: -73.17≤Rim / CTi+Dis / dis≤70.87, Wherein, Rim is the radius of curvature of the image side of the i-th lens, CTi is the center thickness of the i-th lens on the optical axis, Dis is the outer diameter of the object side of the i-th spacer element, and dis is the inner diameter of the object side of the i-th spacer element, where i is taken from 1, 2, 3 or 4.
4. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include a j-th spacer element disposed on the image side of the j-th lens and in partial contact with the j-th lens, and a (j-1)-th spacer element disposed on the image side of the (j-1)-th lens and in partial contact with the (j-1)-th lens, wherein the optical imaging lens satisfies: 1.0<EP(j-1) / CPj+T(j-1) / CTj<20.0, Wherein, Ep(j-1) is the distance between the (j-1)th spacer element and the jth spacer element along the optical axis, CPj is the maximum thickness of the jth spacer element, T(j-1) is the air gap between the (j-1)th lens and the jth lens on the optical axis, and CTj is the center thickness of the jth lens on the optical axis, where j is taken from 5, 6 or 7.
5. The optical imaging lens according to claim 4, characterized in that, satisfy: 1.91≤EP(j-1) / CPj+T(j-1) / CTj≤25.
15.
6. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include: A seventh spacer element disposed on the image side of the seventh lens and in partial contact with the seventh lens, and The eighth spacer element is disposed between the seventh spacer element and the eighth lens.
7. The optical imaging lens according to claim 6, characterized in that, The radius of curvature R16 of the image-side surface of the eighth lens, the radius of curvature R15 of the object-side surface of the eighth lens, the effective focal length f8 of the eighth lens, the inner diameter d7bs of the object-side surface of the eighth spacer element, and the inner diameter d7bm of the image-side surface of the eighth spacer element satisfy the following: 20.0<(R16-R15) / f8×(d7bs / d7bm)<80.
0.
8. The optical imaging lens according to claim 7, characterized in that, satisfy: 36.52≤(R16-R15) / f8×(d7bs / d7bm)≤71.
28.
9. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include: a sixth spacer element disposed on the image side of the sixth lens and in contact with a portion of the image side surface of the sixth lens; and a seventh spacer element disposed on the image side of the seventh lens and in contact with a portion of the image side surface of the seventh lens. The outer diameter D6s of the object side surface of the sixth spacer element, the inner diameter d6s of the object side surface of the sixth spacer element, the spacing distance EP67 between the sixth spacer element and the seventh spacer element along the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy the following: 33.68≤(D6s+d6s) / EP67+T67 / CT6≤37.
22.
10. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include: a first spacer element disposed on the image side of the first lens and in contact with a portion of the image side surface of the first lens; and a second spacer element disposed on the image side of the second lens and in contact with a portion of the image side surface of the second lens. The spacing EP12 between the first spacer element and the second spacer element along the optical axis, the maximum thickness CP1 of the first spacer element, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 18.14≤EP12 / CP1+CT1 / T12≤21.
60.
11. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include: a fifth spacer element disposed on the image side of the fifth lens and in contact with a portion of the image side surface of the fifth lens; and a sixth spacer element disposed on the image side of the sixth lens and in contact with a portion of the image side surface of the sixth lens. The air gap T56 between the fifth and sixth lenses on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, the spacing EP56 between the fifth and sixth spacers along the optical axis, the maximum thickness CP6 of the sixth spacer, the radius of curvature R11 of the object side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy the following: -31.85≤(T56+CT6) / (EP56+CP6)×(R11 / f6)≤-1.
95.
12. The optical imaging lens according to claim 1, characterized in that, The at least seven spacer elements include flat-angle spacer elements or chamfered spacer elements, wherein the inner hole of the chamfered spacer element has a chamfer in the range of 45° to 60° on its object side or image side.
13. The optical imaging lens according to claim 12, characterized in that, The at least seven spacer elements include a fifth spacer element disposed on the image side of the fifth lens and in partial contact with the fifth lens. The radius of curvature R9 of the object side of the fifth lens, the radius of curvature R10 of the image side of the fifth lens, the inner diameter d5s of the object side of the fifth spacer element, and the inner diameter d5m of the image side of the fifth spacer element satisfy the following: 1.79≤(R9×R10) / (d5s×d5m)≤3.43.