Optical lens, camera module and electronic device

Abstract

The invention discloses an optical lens, a camera module and an electronic device, the optical lens has four lens elements with refractive power, and the optical lens comprises a first optical element with refractive power, a second optical element with refractive power, a third optical element with refractive power, a fourth optical element with refractive power, a fifth optical element with refractive power, a fifth optical element with refractive power, a sixth optical element with refractive power, and a sixth optical element with refractive power, the first lens group comprises a first lens and a second lens which are arranged in sequence; the first lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. A second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof; a second lens group including a third lens and a fourth lens; a third lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region; and a second optical element. According to the optical lens, the imaging quality can be ensured while the miniaturization design is met.

Claims

1. An optical lens, characterized in that: There are a total of four refractive lenses, which sequentially include from the object side to the image side along the optical axis: The first optical element, having refractive power, with its first incident surface being convex near the optical axis and its first exit surface being concave near the optical axis; The first lens group, including a first lens and a second lens sequentially arranged from the object side to the image side in the direction of the optical axis; The first lens, having positive refractive power, with both its object side surface and image side surface being convex near the optical axis; The second lens, having negative refractive power, with its object side surface being concave near the optical axis and its image side surface being convex near the optical axis; The second lens group, the second lens group including a third lens and a fourth lens sequentially arranged from the object side to the image side of the optical axis; The third lens, having negative refractive power, with its object side surface being concave near the optical axis; The fourth lens, having positive refractive power, with its object side surface being convex near the optical axis and its image side surface being concave near the optical axis; Among them, the first lens group is fixed relative to the imaging surface of the optical lens, and the second lens group is movable along the optical axis direction; The second optical element; The optical lens satisfies the following relationships: 2.2 < FNO < 3.1; 19° < FOV < 30°; Among them, FNO is the f-number of the optical lens, and FOV is the maximum field angle of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 5.5 < TTL / ImgH < 6.6, and / or, 4 < LTL / ImgH < 4.6, and / or, 1.2 < TTL / fz1 < 1.5, and / or, 0.9 < fz1 / LTL < 1.2; Among them, TTL is the distance on the optical axis from the first incident surface of the first optical element to the imaging surface of the optical lens, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, LTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, and fz1 is the effective focal length of the optical lens in the telephoto state.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: -2.4 < fz1 / R1 < -1.6, and / or, 3.7 < fz1 / R2 < 4.5, and / or, 4.8 < fz1 / R3 < 5.7, and / or, 2.7 < fz1 / R4 < 3.5, and / or, 2.3 < fz1 / R� < U.8, and / or, 1.3 < |R6| / fz1; and / or, 3.8 < fz1 / |R7| < 5.0, and / or, 4 < fz1 / |R8| < 5.1, and / or, 1.3 < fz1 / PR1 < 2.1, and / or, -1.8 < fz1 / PR2 < -1.1; It should be noted that there may be some inaccuracies in the text you provided, such as the symbol "R�" which is not a standard symbol. I have translated it as "R�" as it is in the original text. You may want to double-check and correct such inaccuracies in the original for a more accurate translation. Where, fz1 is the effective focal length of the optical lens in the telephoto state, R1 is the curvature radius of the object side surface of the first lens on the optical axis, R2 is the curvature radius of the image side surface of the first lens on the optical axis, R3 is the curvature radius of the object side surface of the second lens on the optical axis, R4 is the curvature radius of the image side surface of the second lens on the optical axis, R5 is the curvature radius of the object side surface of the third lens on the optical axis, R6 is the curvature radius of the image side surface of the third lens on the optical axis, R7 is the curvature radius of the object side surface of the fourth lens on the optical axis, R8 is the curvature radius of the image side surface of the fourth lens on the optical axis, PR1 is the curvature radius of the first incident surface of the first optical element on the optical axis, and PR2 is the curvature radius of the first exit surface of the first optical element on the optical axis.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 2.9 < f1 / fz1 < 4, and / or, -1.2 < fz1 / f2 < -1.0, and / or, -2.2 < fz1 / f3 < -1.5, and / or, 3 < |f4| / fz1; Where, f1 is the effective focal length of the first lens, fz1 is the effective focal length of the optical lens in the telephoto state, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: -2.8 < R1 / R2 < -1.7, and / or, 1.6 < R4 / R3 < 19, and / or, 5.0 < |R6| / R5, and / or, 0.9 < R8 / R7 < 1.0; Where, R1 is the curvature radius of the object side surface of the first lens on the optical axis, R2 is the curvature radius of the image side surface of the first lens on the optical axis, R3 is the curvature radius of the object side surface of the second lens on the optical axis, R4 is the curvature radius of the image side surface of the second lens on the optical axis, R5 is the curvature radius of the object side surface of the third lens on the optical axis, R6 is the curvature radius of the image side surface of the third lens on the optical axis, R7 is the curvature radius of the object side surface of the fourth lens on the optical axis, and R8 is the curvature radius of the image side surface of the fourth lens on the optical axis.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 4.2 < Imgh / SD8 < 5.3, and / or, 0.8 < SD8 / SD1 < 1.2, and / or, 1.0 < SDmax / SDmin < 1.2; Where, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, SD1 is half of the maximum effective aperture of the object side surface of the first lens, SDmax is the maximum effective semi-aperture of the optical lens, and SDmin is the minimum effective semi-aperture of the optical lens.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 0.6 < CT1 / CT2 < 1.4, and / or, 1.1 < CT3 / CT4 < 1.3, and / or, 1.2 < CT2 / CT3 < 1.7; Where CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, and CT4 is the thickness of the fourth lens on the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 1.8 < BL / TDz1 < 2, and / or, 2.7 < Lz1 / Imgh < 3.2; and / or, 1.0 < TDz2 / TDz1 < 1.1, and / or, 1.3 < TDz1 / Imgh < 1.6, and / or, 1.2 < GL1 / GL2 < 1.6; Where BL is the distance on the optical axis from the image side of the fourth lens to the imaging surface of the optical lens, TDz1 is the distance on the optical axis from the object side of the first lens to the image side of the fourth lens in the telephoto state, Lz1 is the sum of the distance on the optical axis from the object side of the first lens to the second incident surface of the second optical element and the thickness of the second optical element on the optical axis in the telephoto state, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, TDz2 is the distance on the optical axis from the object side of the first lens to the image side of the fourth lens in the close-focus state, GL1 is the distance on the optical axis from the object side of the first lens to the image side of the second lens, and GL2 is the distance on the optical axis from the object side of the third lens to the image side of the fourth lens.

9. A camera module, characterized in that: Comprising: The optical lens according to any one of claims 1 to 8; And An image sensor, disposed on the image side of the optical lens.

10. An electronic device, characterized in that: Comprising: A housing; And The imaging module according to claim 9, the imaging module being mounted on the housing.

Images