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CN-122018115-A - Optical lens

CN122018115ACN 122018115 ACN122018115 ACN 122018115ACN-122018115-A

Abstract

The invention provides an optical lens which comprises six lenses in sequence from an object side to an imaging surface along an optical axis, wherein the six lenses comprise 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 positive focal power, an object side surface of which is a convex surface, an image side surface of which is a concave surface, a sixth lens with negative focal power, an object side surface of which is a concave surface, and an image side surface curvature radius R10 of the fifth lens and an object side surface curvature radius R11 of the sixth lens are 0< (R10+R11)/(R10-R11) <1. The optical lens provided by the invention adopts six lenses with specific focal power, and can improve the imaging quality of the optical lens, reduce the aberration and improve the imaging quality of the optical lens through specific surface shape collocation and reasonable focal power distribution, so that the lens has one or more advantages of long focus, large target surface, high imaging quality and the like.

Inventors

  • Ren Jiahao
  • CHEN WEIJIAN

Assignees

  • 江西联创电子有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. An optical lens comprising six lenses in order from an object side to an imaging surface along an optical axis, comprising: a first lens having positive optical power; a second lens having positive optical power; A third lens having positive optical power; a fourth lens having negative optical power; a fifth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a sixth lens with negative focal power, the object side surface of which is a concave surface; wherein the image side curvature radius R10 of the fifth lens and the object side curvature radius R11 of the sixth lens satisfy 0< (R10+R11)/(R10-R11) <1.
  2. 2. The optical lens according to claim 1, wherein the maximum field angle FOV of the optical lens and the aperture value FNo of the optical lens satisfy 12 DEG < FOV/FNo <17.5 DEG, and the total optical length TTL of the optical lens, the real image height IH corresponding to the maximum field angle FOV of the optical lens and the maximum field angle of the optical lens satisfy 85<180 DEG x TTL/IH/FOV <119.
  3. 3. The optical lens of claim 1, wherein the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy f5/f >0.6.
  4. 4. The optical lens of claim 1, wherein the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy-1.7 < f6/f < -0.4.
  5. 5. The optical lens of claim 1, wherein the effective focal length f of the optical lens and the object-side radius of curvature R9 of the fifth lens satisfy 0.4< R9/f <1.
  6. 6. The optical lens of claim 1, wherein the effective focal length f of the optical lens and the image side radius of curvature R10 of the fifth lens satisfy 0.5< R10/f <7.
  7. 7. The optical lens of claim 1, wherein the effective focal length f of the optical lens and the object-side radius of curvature R11 of the sixth lens satisfy-2.7 < R11/f < -0.3.
  8. 8. The optical lens of claim 1, wherein an object-side radius of curvature R3 of the second lens and an image-side radius of curvature R4 of the second lens satisfy 0.2< R3/R4<1.1, and an object-side radius of curvature R7 of the fourth lens and an image-side radius of curvature R8 of the fourth lens satisfy 0.4< R7/R8<8.3.
  9. 9. The optical lens of claim 1, wherein an object-side radius of curvature R9 of the fifth lens and an image-side radius of curvature R10 of the fifth lens satisfy | (R9-R10)/(R9+R10) | <0.9.
  10. 10. The optical lens of claim 1, wherein the image-side light-transmitting half-caliber saggita of the fifth lens element 10 and the image-side light-transmitting half-caliber d10 of the fifth lens element satisfy 0< Sag10/d10<0.3, and the object-side light-transmitting half-caliber saggita of the sixth lens element 11 and the object-side light-transmitting half-caliber d11 of the sixth lens element satisfy-0.4 < Sag11/d11<0.

Description

Optical lens Technical Field The invention relates to the technical field of imaging lenses, in particular to an optical lens. Background Along with the continuous improvement of the requirements of people on driving experience, the vehicle-mounted application optical lens is increasingly used in intelligent driving, and the position of the vehicle-mounted optical lens in the related industries of automobiles is continuously improved. Advanced Driving Assistance Systems (ADASs) play an important role in intelligent driving, and collect environmental information through various lenses in combination with sensors to ensure driving safety of drivers. In addition to the light, thin, short, small, and high-pixel and high-resolution characteristics of the conventional ADAS system lens, the optical lens is required to be capable of clearly imaging under a low-illuminance condition, so that it is required to develop an optical lens with good imaging effect. Disclosure of Invention In view of the foregoing, an object of the present invention is to provide an optical lens having an advantage of excellent imaging quality. The invention adopts the technical scheme that: An optical lens comprising six lenses in order from an object side to an imaging surface along an optical axis: a first lens having positive optical power; a second lens having positive optical power; A third lens having positive optical power; a fourth lens having negative optical power; a fifth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a sixth lens with negative focal power, the object side surface of which is a concave surface; wherein the image side curvature radius R10 of the fifth lens and the object side curvature radius R11 of the sixth lens satisfy 0< (R10+R11)/(R10-R11) <1. Further preferably, the maximum field angle FOV of the optical lens and the aperture value FNo of the optical lens satisfy 12 DEG < FOV/FNo <17.5 DEG, and the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field angle FOV of the optical lens and the maximum field angle of the optical lens satisfy 85<180 DEG x TTL/IH/FOV <119. Further preferably, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy f5/f >0.6. Further preferably, the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy-1.7 < f6/f < -0.4. Further preferably, the effective focal length f of the optical lens and the object side curvature radius R9 of the fifth lens satisfy 0.4< R9/f <1. Further preferably, the effective focal length f of the optical lens and the image side curvature radius R10 of the fifth lens satisfy 0.5< R10/f <7. Further preferably, the effective focal length f of the optical lens and the object side curvature radius R11 of the sixth lens satisfy-2.7 < R11/f < -0.3. Further preferably, the object-side radius of curvature R3 of the second lens and the image-side radius of curvature R4 of the second lens satisfy 0.2< R3/R4<1.1, and the object-side radius of curvature R7 of the fourth lens and the image-side radius of curvature R8 of the fourth lens satisfy 0.4< R7/R8<8.3. Further preferably, the object-side surface curvature radius R9 of the fifth lens and the image-side surface curvature radius R10 of the fifth lens satisfy | (R9-R10)/(R9+R10) | <0.9. Further preferably, the image side light transmitting half-caliber sagittal height Sag10 of the fifth lens and the image side light transmitting half-caliber d10 of the fifth lens meet 0< Sag10/d10<0.3, and the object side light transmitting half-caliber sagittal height Sag11 of the sixth lens and the object side light transmitting half-caliber d11 of the sixth lens meet-0.4 < Sag11/d11<0. The optical lens provided by the invention adopts six lenses with specific focal power, and can improve the imaging quality of the optical lens, reduce the aberration and improve the imaging quality of the optical lens through specific surface shape collocation and reasonable focal power distribution, so that the lens has one or more advantages of long focus, large target surface, high imaging quality and the like. Drawings The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which: fig. 1 is a schematic structural diagram of an optical lens in embodiment 1 of the present invention. Fig. 2 is a graph showing F-Tan (Theta) distortion of an optical lens in example 1 of the present invention. Fig. 3 is an MTF graph of the optical lens in example 1 of the present invention. Fig. 4 is a schematic structural diagram of an optical lens in embodiment 2 of the present invention. Fig. 5 is a graph showing F-Tan (Theta) distortion of an optical lens in example 2 of the present invention. Fig.