CN-117192741-B - Optical imaging lens

CN117192741BCN 117192741 BCN117192741 BCN 117192741BCN-117192741-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 negative 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 and a sixth lens with positive focal power from an object side to an image side along an optical axis, the interval elements comprise a fifth interval element which is arranged between the fifth lens and the sixth lens and is in contact with the image side of the fifth lens, and the lens barrel is used for accommodating the imaging lens group and the interval elements, wherein the curvature radius R7 of the object side of the fourth lens, the curvature radius R8 of the image side of the fourth lens, the outer diameter D5m of the image side of the fifth interval element and the inner diameter D5m of the image side of the fifth interval element meet the condition that-7.5 < (R7+R8)/(D5 m-D5 m) < -1.0.

Inventors

DING REN
Ke Zailin
WANG ZEGUANG
LI HUI
HUANG CHONGJIAN
ZHU JIADONG
DING XIANCUI
DAI FUJIAN
ZHAO LIEFENG

Assignees

浙江舜宇光学有限公司

Dates

Publication Date: 20260505
Application Date: 20220607

Claims (11)

1. An optical imaging lens, comprising: the imaging lens group sequentially comprises a first lens with negative 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 and a sixth lens with positive focal power from the object side to the image side along an optical axis; A plurality of spacing elements including a first spacing element disposed between and in contact with an image side of the first lens and a fifth spacing element disposed between and in contact with an image side of the fifth lens, and A lens barrel for accommodating the imaging lens group and the plurality of spacer elements, wherein, The number of lenses with focal power in the optical imaging lens is six; the object side surface of the first lens is a concave surface, and the image side surface is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface is a concave surface; The object side surface of the sixth lens is a convex surface, and the image side surface is a concave surface; The radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the outer diameter D5m of the image side surface of the fifth spacing element and the inner diameter D5m of the image side surface of the fifth spacing element satisfy that-7.42 is less than or equal to (R7+R8)/(D5 m-D5 m) is less than or equal to-1.05; the maximum thickness CP1 of the first interval element along the optical axis direction, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens are up to 117.36 (R1 +R2)/CP 1 is up to 134.83.
2. The optical imaging lens of claim 1, wherein said plurality of spacer elements further comprises a third spacer element disposed between said third lens and said fourth lens and in contact with an image side surface of said third lens, wherein, The inner diameter d3s of the object side surface of the third spacing element, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy that d3 s/(R5+R6) is less than or equal to 5.19 and less than or equal to 10.35.
3. The optical imaging lens of claim 1, wherein said plurality of spacer elements further comprises a fourth spacer element disposed between said fourth lens and said fifth lens and in contact with an image side surface of said fourth lens, wherein, The effective focal length f4 of the fourth lens, the center thickness CT5 of the fifth lens on the optical axis, the air interval T45 of the fourth lens and the fifth lens on the optical axis, the maximum thickness CP4 of the fourth interval element along the optical axis direction and the interval EP45 of the fourth interval element and the fifth interval element along the optical axis direction meet 17.18-minus (CT 5+ T45) multiplied by EP 45/(CP 4 xf 4) -minus 5.52.
4. An optical imaging lens as claimed in any one of claims 1 to 3, wherein, The outer diameter D1s of the object side surface of the first interval element, half of the maximum field angle of the optical imaging lens, half-FOV, the sum of air intervals sigma AT between any adjacent two lenses from the first lens to the sixth lens on the optical axis and the maximum height L of the lens barrel along the optical axis direction meet the following conditions that D1s multiplied by tan (half-FOV)/(sigma AT-L) is less than or equal to 3.22 and less than or equal to 2.44.
5. The optical imaging lens as claimed in any one of claims 1 to 3, wherein the plurality of spacer elements further comprises a sixth spacer element disposed on and in contact with an image side of the sixth lens, wherein, The inner diameter d5s of the object side surface of the fifth spacing element, the inner diameter d6s of the object side surface of the sixth spacing element, the center thickness CT6 of the sixth lens on the optical axis, and the air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy that (d5s+d6s)/(CT6+T56) is less than or equal to 10.48 and less than or equal to 13.10.
6. The optical imaging lens of claim 1, wherein said plurality of spacer elements further comprises a fourth spacer element disposed between said fourth lens and said fifth lens and in contact with an image side surface of said fourth lens, wherein, The inner diameter d4s of the object side surface of the fourth spacing element, the spacing EP45 between the fourth spacing element and the fifth spacing element along the optical axis direction and the center thickness CT4 of the fourth lens on the optical axis satisfy that the ratio of d4s-EP45 to CT4 is more than or equal to 4.50 and less than or equal to 8.88.
7. The optical imaging lens of claim 1 wherein said plurality of spacer elements further comprises a third spacer element disposed between and in contact with an image side of said third lens and a fourth spacer element disposed between and in contact with an image side of said fourth lens, The center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the maximum thickness CP3 of the third interval element along the optical axis direction and the maximum thickness CP4 of the fourth interval element along the optical axis direction meet that CT3/CP3-CT4/CP4 is not less than 11.11 and not more than 17.40.
8. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises a sixth spacer element disposed on and in contact with an image side of the sixth lens, wherein, The effective focal length f1 of the first lens, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the maximum thickness CP1 of the first spacing element along the optical axis direction, the maximum thickness CP5 of the fifth spacing element along the optical axis direction and the maximum thickness CP6 of the sixth spacing element along the optical axis direction satisfy that 2.95 is less than or equal to |f6xCP1/(C5+f1xCP6) | is less than or equal to 36.26.
9. The optical imaging lens of claim 1, wherein said plurality of spacer elements further comprises a fourth spacer element disposed between said fourth lens and said fifth lens and in contact with an image side surface of said fourth lens, wherein, The effective focal length f6 of the sixth lens, the curvature radius R7 of the object side of the fourth lens, the curvature radius R11 of the object side of the sixth lens and the maximum thickness CP4 of the fourth spacing element along the optical axis direction satisfy that-224.07 is less than or equal to f6/R11+R7/CP4 is less than or equal to 310.78.
10. The optical imaging lens of claim 1, wherein the plurality of spacer elements further comprises at least one auxiliary spacer element disposed between any adjacent two of the lenses, the object side of the auxiliary spacer element being in contact with the spacer element or other auxiliary spacer element located on the object side thereof, the image side of the auxiliary spacer element being in contact with the lens or other auxiliary spacer element located on the image side thereof.
11. The optical imaging lens of claim 1, wherein said plurality of spacer elements further comprises a second spacer element disposed between and in contact with an image side of said second lens and a sixth spacer element disposed on and in contact with an image side of said sixth lens, wherein, The outer diameter D1s of the object side surface of the first spacing element, the inner diameter D2s of the object side surface of the second spacing element, the effective focal length f2 of the second lens, the outer diameter D5m of the image side surface of the fifth spacing element, and the spacing EP56 between the fifth spacing element and the sixth spacing element in the optical axis direction satisfy 16.20 < D1s-D2s > xf 2- (D5 m x EP 56) < 32.09.

Description

Optical imaging lens Statement of divisional application The application is a divisional application of China patent application with the application number 202210638659.4, which is filed on the year 2022, month 06 and day 07 and has the name of optical imaging lens. Technical Field The application relates to the field of optical elements, in particular to an optical imaging lens. Background In recent years, the wide-angle camera has a larger field angle, and meanwhile, the depth of field is longer, so that a wider picture background can be accommodated in the process of self-shooting, and meanwhile, a clear imaging effect can be ensured, the proportion of the figure image on the whole picture is more reasonable, and the picture is more attractive. Therefore, wide-angle imaging lenses are commonly used in mobile phones, however, wide-angle lenses generally have disadvantages of large volume and poor structural stability. As is generally known, a lens in an optical imaging lens includes an imaging portion and a structural portion, and when light is incident on the structural portion and reflected and refracted by the lens, stray light is easily formed on an image plane. But also the angle of view of the wide-angle lens is larger, the structural part is more prone to generate stray light. Therefore, how to make the optical imaging lens ensure a wide angle and a long depth of field, and reduce the axial length of the lens group, so that the lens is more advantageous in a light and thin direction, and how to improve the structure of the spacing elements (such as the annular optical element and the light shielding sheet) in the lens, and improve the stray light and the assembly stability, have become one of the most important issues nowadays. Disclosure of Invention The application provides 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 negative 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 and a sixth lens with positive focal power from an object side to an image side along an optical axis, the interval elements comprise a fifth interval element which is arranged between the fifth lens and the sixth lens and is in contact with the image side of the fifth lens, and the lens barrel is used for accommodating the imaging lens group and the interval elements, wherein the radius of curvature R7 of the object side of the fourth lens, the radius of curvature R8 of the image side of the fourth lens, the outer diameter D5m of the image side of the fifth interval element and the inner diameter D5m of the image side of the fifth interval element meet the range of-7.5 < (R7+R8)/(D5 m-D5 m) < -1.0. An imaging lens group including, in order from an object side to an image side along an optical axis, a first lens having negative 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 having positive optical power, and a sixth lens having positive optical power; and a plurality of spacer elements including a first spacer element interposed between the first lens and the second lens and in contact with an image side surface of the first lens, a second spacer element interposed between the second lens and the third lens and in contact with an image side surface of the second lens, a fifth spacer element interposed between the fifth lens and the sixth lens and in contact with an image side surface of the fifth lens, and a sixth spacer element interposed between an image side surface of the sixth lens and in contact with an image side surface of the sixth lens, and a lens barrel for accommodating the imaging lens group and the plurality of spacer elements, wherein a sum ΣAT of an outer diameter D1s of an object side surface of the first spacer element, a half of a maximum field angle of an optical imaging lens, a sum of air spaces on an optical axis between any adjacent two lenses in the first lens to the sixth lens, and a maximum height L in an optical axis direction are satisfied by-4.0 < D1s×FOV (Semi-L) < -2.0, and an inner diameter D1s of an object side surface of the first spacer element, an inner diameter of an object side surface of the second spacer element, an outer diameter D1s of the second spacer element, an inner diameter of the second spacer element, an effective focal length of the second spacer element, and an outer diameter D2 f of the second spacer element are satisfied, the interval EP56 between the fifth interval element and the sixth interval element in the optical axis direction satisfies 16.0< (D1 s-D2 s) ×f2- (D5 m×EP 56) <33.0. In one embodiment, the plurality of spacer elements further comprises a third spacer element dispo