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EP-4220268-B1 - OPTICAL LENS, OPTICAL MODULE AND ELECTRONIC DEVICE

EP4220268B1EP 4220268 B1EP4220268 B1EP 4220268B1EP-4220268-B1

Inventors

  • HO, Chunyen

Dates

Publication Date
20260506
Application Date
20210923

Claims (14)

  1. An optical lens, sequentially comprising, from an object side to an image side along an optical axis: a first lens (1) with a negative bending force, wherein an object side surface of the first lens (1) is convex, and an image side surface of the first lens (1) is concave; a second lens (2) with a positive bending force, wherein an object side surface of the second lens (2) is convex, and an image side surface of the second lens (2) is concave; a third lens (3) with a positive bending force, wherein an object side surface of the third lens (3) is convex, and an image side surface of the third lens (3) is concave; a fourth lens (4) with a positive bending force, wherein both an object side surface and an image side surface of the fourth lens (4) are convex; a fifth lens (5) with a negative bending force, wherein an object side surface of the fifth lens (5) is convex and an image side surface of the fifth lens (5) is concave; a sixth lens (6) with a positive bending force, wherein an object side surface of the sixth lens (6) is concave, and an image side surface of the sixth lens (6) is convex; a seventh lens (7) with a negative bending force, wherein an object side surface of the seventh lens (7) comprises a first bending portion and a second bending portion, the first bending portion and the second bending portion are connected to form a convex surface, and an image side surface of the seventh lens (7) comprises a third bending portion and a fourth bending portion, and the third bending portion and the fourth bending portion are connected to form a concave surface; the optical lens satisfies the following relational expressions: 0.7 < V 1 / V 2 < 5.2 ; 0.1 < V 2 / V 3 < 0.6 ; 0.2 < V 3 / V 4 < 1.8 ; 0.7 < V 4 / V 5 < 5.2 ; 0.1 < V 5 / V 6 < 0.6 ; 0.6 < V 6 / V 7 < 4.2 ; and N 1 < N 2 , N 2 > N 3 , N 4 < N 5 , N 6 < N 5 , N 6 < N 7 , wherein V1 is a dispersion coefficient of the first lens (1), V2 is a dispersion coefficient of the second lens (2), V3 is a dispersion coefficient of the third lens (3), V4 is a dispersion coefficient of the fourth lens (4), V5 is a dispersion coefficient of the fifth lens (5), V6 is a dispersion coefficient of the sixth lens (6), V7 is a dispersion coefficient of the seventh lens (7), N1 is a refractive index of the first lens (1), N2 is a refractive index of the second lens (2), N3 is a refractive index of the third lens (3), N4 is refractive index of the fourth lens (4), N5 is a refractive index of the fifth lens (5), N6 isa refractive index of the sixth lens (6), and N7 is a refractive index of the seventh lens (7).
  2. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: 8.6 mm < R 1 < 23.1 mm , 0.9 mm < R 2 < 2.5 mm ; 2.0 mm < R 3 < 5.3 mm , 2.6 mm < R 4 < 7.0 mm ; 2.5 mm < R 5 < 6.8 mm , 4.0 mm < R 6 < 10.7 mm ; 1.9 mm < R 7 < 5.2 mm , -0 . 8 mm < R 8 < -2 . 2 mm ; 3.8 mm < R 9 < 10.2 mm , 1.4 mm < R 10 < 3.6 mm ; -2 . 1 mm < R 11 < -5 . 7 mm , -0 . 5 mm < R 12 < -1 . 3 mm ; and 1.6 mm < R 13 < 4.2 mm , 0.5 mm < R 14 < 1.3 mm , wherein R1 is a radius of the object side surface of the first lens, R2 is a radius of the image side surface of the first lens, R3 is a radius of the object side surface of the second lens, R4 is a radius of the image side surface of the second lens, R5 is a radius of the object side surface of the third lens, R6 is a radius of the image side surface of the third lens, R7 is a radius of the object side surface of the fourth lens, R8 is a radius of the image side surface of the fourth lens, R9 is a radius of the object side surface of the fifth lens, R10 is a radius of the image side surface of the fifth lens, R11 is a radius of the object side surface of the sixth lens, R12 is a radius of the image side surface of the sixth lens, R13 is a radius of the object side surface of the seventh lens, and R14 is a radius of the image side surface of the seventh lens.
  3. The optical lens according to claim 2, wherein the optical lens satisfies the following relational expressions: -2.9 mm < f1 < -4.4 mm; 15 mm < f2 < 22.8 mm, 18.5 mm < f3 < 28.1 mm, 1.7 mm < f4 < 2.6 mm, -4.8 mm < f5 < -7.4 mm, 1.6 mm < f6 < 2.4 mm, -1.7 mm < f7 < -2.6 mm, wherein f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens; and the optical lens further comprises an aperture arranged between the third lens and the fourth lens.
  4. The optical lens according to claim 2, wherein the optical lens satisfies the following relational expressions: 0.6 mm < CT1 < 0.8 mm, 0.5 mm < CT2 < 0.8 mm, 0.3 mm < CT3 < 0.4 mm, 0.8 mm < CT4 < 1.1 mm, 0.3 mm < CT5 < 0.4 mm, 0.8 mm < CT6 < 1.0 mm, 0.4 mm < CT7 < 0.5 mm, wherein CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, CT5 is a central thickness of the fifth lens on the optical axis, CT6 is a central thickness of the sixth lens on the optical axis, and CT7 is a central thickness of the seventh lens on the optical axis.
  5. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: 4.1 mm < R 1 < 11 mm , 0.9 mm < R 2 < 2.4 mm ; 2.2 mm < R 3 < 5.8 mm , 2.6 mm < R 4 < 7.1 mm ; 2.5 mm < R 5 < 6.7 mm , 4.2 mm < R 6 < 11.2 mm ; 2.0 mm < R 7 < 5.4 mm , − 0.8 mm < R 8 < − 2.1 mm ; 4.0 mm < R 9 < 10.6 mm , 1.4 mm < R 10 < 3.6 mm ; − 1.7 mm < R 11 < − 4.6 mm , − 0.5 mm < R 12 < − 1.3 mm ; and 1.6 mm < R 13 < 4.4 mm , 0.5 mm < R 14 < 1.2 mm , wherein R1 is a radius of the object side surface of the first lens, R2 is a radius of the image side surface of the first lens, R3 is a radius of the object side surface of the second lens, R4 is a radius of the image side surface of the second lens, R5 is a radius of the object side surface of the third lens, R6 is a radius of the image side surface of the third lens, R7 is a radius of the object side surface of the fourth lens, R8 is a radius of the image side surface of the fourth lens, R9 is a radius of the object side surface of the fifth lens, R10 is a radius of the image side surface of the fifth lens, R11 is a radius of the object side surface of the sixth lens, R12 is a radius of the image side surface of the sixth lens, R13 is a radius of the object side surface of the seventh lens, and R14 is a radius of the image side surface of the seventh lens.
  6. The optical lens according to claim 5, wherein the optical lens satisfies the following relational expressions: -3.3 mm < f1 < -5.1 mm; 21.6 mm < f2 < 32.9 mm, 16.7 mm < f3 < 25.5 mm, 1.7 mm < f4 < 2.6 mm, -4.8 mm < f5 < -7.3 mm, 1.6 mm < f6 < 2.4 mm, -1.7 mm < f7 < -2.5 mm, wherein f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens; and the optical lens further comprises an aperture arranged between the third lens and the fourth lens.
  7. The optical lens according to claim 5, wherein the optical lens satisfies the following relational expressions: 0.3 mm < CT1 < 0.5 mm; 0.5 mm < CT2 < 0.7 mm, 0.3 mm < CT3 < 0.4 mm, 0.8 mm < CT4 < 1.1 mm, 0.3 mm < CT5 < 0.4 mm, 0.8 mm < CT6 < 1.1 mm, 0.4 mm < CT7 < 0.6 mm, wherein CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, CT5 is a central thickness of the fifth lens on the optical axis, CT6 is a central thickness of the sixth lens on the optical axis, and CT7 is a central thickness of the seventh lens on the optical axis.
  8. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: 8.6 mm < R 1 < 23 mm , 0.9 mm < R 2 < 2.5 mm ; 2.0 mm < R 3 < 5.2 mm , 2.5 mm < R 4 < 6.8 mm ; 2.6 mm < R 5 < 7 mm , 3.8 mm < R 6 < 10.1 mm ; 1.9 mm < R 7 < 5 mm , − 0.8 mm < R 8 < − 2.2 mm ; 4.6 mm < R 9 < 12.3 mm , 1.4 mm < R 10 < 3.8 mm ; − 2 mm < R 11 < − 5.5 mm , − 0.5 mm < R 12 < − 1.3 mm ; and 1.6 mm < R 13 < 4.3 mm , 0.5 mm < R 14 < 1.3 mm , wherein R1 is a radius of the object side surface of the first lens, R2 is a radius of the image side surface of the first lens, R3 is a radius of the object side surface of the second lens, R4 is a radius of the image side surface of the second lens, R5 is a radius of the object side surface of the third lens, R6 is a radius of the image side surface of the third lens, R7 is a radius of the object side surface of the fourth lens, R8 is a radius of the image side surface of the fourth lens, R9 is a radius of the object side surface of the fifth lens, R10 is a radius of the image side surface of the fifth lens, R11 is a radius of the object side surface of the sixth lens, R12 is a radius of the image side surface of the sixth lens, R13 is a radius of the object side surface of the seventh lens, and R14 is a radius of the image side surface of the seventh lens.
  9. The optical lens according to claim 8, wherein the optical lens satisfies the following relational expressions: -3 mm < f1 < -4.5 mm; 15.3 mm < f2 < 23.3 mm, 22.6 mm < f3 < 34.4 mm, 1.7 mm < f4 < 2.6 mm, -4.8 mm < f5 < -7.3 mm, 1.6 mm < f6 < 2.5 mm, -1.8 mm < f7 < -2.8 mm, wherein f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens; and the optical lens further comprises an aperture arranged between the third lens and the fourth lens.
  10. The optical lens according to claim 8, wherein the optical lens satisfies the following relational expressions: 0.6 mm < CT1 < 0.8 mm; 0.6 mm < CT2 < 0.8 mm, 0.3 mm < CT3 < 0.4 mm, 0.7 mm < CT4 < 1 mm, 0.3 mm < CT5 < 0.4 mm, 0.7 mm < CT6 < 1 mm, 0.4 mm < CT7 < 0.6 mm, wherein CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, CT5 is a central thickness of the fifth lens on the optical axis, CT6 is a central thickness of the sixth lens on the optical axis, and CT7 is a central thickness of the seventh lens on the optical axis.
  11. The optical lens according to claim 1, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspheric lenses.
  12. An optical module, comprising: the optical lens according to any one of claims 1 to 11; a photosensitive element; and a light filter arranged between a seventh lens of the optical lens and the photosensitive element.
  13. The optical module according to claim 12, wherein a long diagonal line of the photosensitive element is greater than or equal to 1.27 cm (1/2.0 inch), and an equivalent focal length of the optical lens is greater than or equal to 11 mm and less than or equal to 12 mm.
  14. An electronic device, comprising the optical module according to any one of claims 12 and 13.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202011041048.9 filed in China on September 28, 2020. TECHNICAL FIELD This application pertains to the field of communications device technologies, and in particular, to an optical lens, an optical module, and an electronic device. BACKGROUND At present, with the continuous development of mobile communication technology and the widespread application of intelligent electronic devices (such as mobile phones), the requirements for cameras of intelligent electronic devices are higher and higher, and lenses with a plurality of focal lengths may also be configured on intelligent electronic devices. The wide-angle lens is required to have low distortion, larger angle of view, and higher pixel. As a result, the ultra wide lens comes into being. In order to have a large angle of view, the ultra wide lens needs a small equivalent focal length, while in order to have high image quality, the ultra wide lens needs a large-size photosensitive element. However, at present, the intelligent electronic device cannot satisfy the requirements on the equivalent focal length and the size of the photosensitive element in the configuration of the ultra wide lens at the same time, to achieve high image quality at a large angle of view. CN111399190A discusses lens from an object sideto an image side along an optical axis, wherein the fifth lens has negative focal power; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; the maximum field angle FOV of the optical imaging lens meets the condition that FOV is larger than 100 degrees and smaller than 120 degrees; the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meets ImgH > 4.5 mm; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD < 2. CN107678130A discusses a camera shooting optical lens. The camera shooting optical lens includes, in sequence from the object side to the image side, a firstlens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens is made of glass. The second lens is made of plastic. The third lens is made of plastic. The fourth lens is made of plastic. The fifth lens is made of plastic. The sixth lens is made of plastic. The seventh lens is made of plastic. The camera shooting optical lens meets the following formulas: -3<=f1/f<=-1, 1.7<=n1<=2.2, and -1<=f6/f7<=10; 2<=(R1+R2)/(R1-R2)<=10; and 0.01<=d1/TTL<=0.2. The camera shooting optical lens can achieve low TTL while achieving high imaging performance. US20120057247A discusses a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with positive refractive power, and a fourth lens group with negative refractive power which are arranged in turn from the object side toward the image side, and the zoom lens system is formed so that, in performing a zooming operation from the wide angle end position to the telephoto end position, the first lens group keeps still, the distance between the first and second lens groups becomes small, the distance between the second and third lens groups becomes wide, and the distance between the third and fourth lens groups to becomes small. US20140043694A discusses an image lens assembly system including in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has a convex object-side surface. The second lens element has positive refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element has refractive power. The sixth lens element with positive refractive power is made of plastic material, wherein at least one surface of the sixth lens element is aspheric. The seventh lens element with negative refractive power made of plastic material has a concave image-side surface changing from concave at a paraxial region to convex at a peripheral region, and at least one surface thereof is aspheric. CN208705559U discusses optical imaging lens, this camera lens is included according to the preface by thing side to picture side along the optical axis: first lens, second lens, third lens, fourthlens, the 5th lens, VI lenses and the 7th lens. First lens have negative optical power, and its thing side is the convex surface, is the concave surface like the side, the second lens have the focal power, the third lens have positive refractive power, the fourth lens have positive refractive power, the 5th lens have the focal power, VI lenses has the focal power, and the 7th lens