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US-20260126617-A1 - CAMERA OPTICAL LENS

US20260126617A1US 20260126617 A1US20260126617 A1US 20260126617A1US-20260126617-A1

Abstract

A camera optical lens includes from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power; and following relational expressions are satisfied: 0.65≤f1/f≤0.85; −1.50≤(f3−f4)/f2≤−0.80; 0.20≤(R3+R4)/f2≤0.80; 2.00≤d1/d3≤7.00; and −3.50≤f234/(d3+d5+d7)≤−2.50. The camera optical lens has excellent optical performance and is particularly suitable for a mobile phone camera lens assembly, and a WEB camera lens composed of camera elements such as CCD, CMOS for high pixels.

Inventors

  • Jiahui Li

Assignees

  • CHANGZHOU AAC RAYTECH OPTRONICS CO., LTD.

Dates

Publication Date
20260507
Application Date
20250207

Claims (10)

  1. 1 . A camera optical lens, comprising, from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power; wherein a focal length of the camera optical lens is defined as f, a focal length of the first lens is defined as f1, a focal length of the second lens is defined as f2, a focal length of the third lens is defined as f3, a focal length of the fourth lens is defined as f4, a combined focal length of the second lens, the third lens and the fourth lens is defined as f234, a central curvature radius of an object side surface of the second lens is R3, a central curvature radius of an image side surface of the second lens is R4, an on-axis thickness of the first lens is defined as d1, an on-axis thickness of the second lens is defined as d3, an on-axis thickness of the third lens is d5, an on-axis thickness of the fourth lens is defined as d7, and following relational expressions are satisfied: 0.65 ≤ f ⁢ 1 / f ≤ 0.85 ; - 1.5 ≤ ( f ⁢ 3 - f ⁢ 4 ) / f ⁢ 2 ≤ - 0 .80 ; 0.2 ≤ ( R ⁢ 3 + R ⁢ 4 ) / f ⁢ 2 ≤ 0 .80 ; 2. ≤ d ⁢ 1 / d ⁢ 3 ≤ 7. ; and - 3.5 ≤ f ⁢ 234 / ( d ⁢ 3 + d ⁢ 5 + d ⁢ 7 ) ≤ - 2 . 5 ⁢ 0 .
  2. 2 . The camera optical lens as described in claim 1 , wherein a central curvature radius of an object side surface of the third lens is defined as R5, and a central curvature radius of an image side surface of the third lens is defined as R6, and a following relational expression is satisfied: 2. ≤ ( R ⁢ 5 + R ⁢ 6 ) / ( R ⁢ 5 - R ⁢ 6 ) ≤ 3. .
  3. 3 . The camera optical lens as described in claim 1 , wherein a sum of on-axis thicknesses of the first lens, the second lens, the third lens, and the fourth lens is ΣTi, and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and a following relational expression is satisfied: 0.5 ≤ ∑ Ti / TTL ≤ 0.7 .
  4. 4 . The camera optical lens as described in claim 1 , wherein an object side surface of the first lens is convex in a paraxial region, and an image side surface of the first lens is convex in the paraxial region; and an on-axis thickness of the first lens is d1, a central curvature radius of an object side surface of the first lens is R1, a central curvature radius of an image side surface of the first lens is R2, and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and following relational expressions are satisfied: - 1.41 ≤ ( R ⁢ 1 + R ⁢ 2 ) / ( R ⁢ 1 - R ⁢ 2 ) ≤ - 0.28 ; and 1.63 ≤ d ⁢ 1 / TTL ≤ 6 . 1 ⁢ 7 .
  5. 5 . The camera optical lens as described in claim 1 , wherein an object side surface of the second lens is concave in a paraxial region, and an image side surface of the second lens is concave in the paraxial region; and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and following relational expressions are satisfied: - 4 . 2 ⁢ 3 ≤ f ⁢ 2 / f ≤ - 0.84 ; 0.04 ≤ ( R ⁢ 3 + R ⁢ 4 ) / ( R ⁢ 3 - R ⁢ 4 ) ≤ 0.42 ; and 0.3 ≤ d ⁢ 3 / TTL ≤ 2 . 7 ⁢ 9 .
  6. 6 . The camera optical lens as described in claim 1 , wherein an object side surface of the third lens is concave in a paraxial region, and an image side surface of the third lens is convex in the paraxial region; and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and the following relational expressions are satisfied: 0.39 ≤ f ⁢ 3 / f ≤ 1.51 ; and 1.83 ≤ d ⁢ 5 / TTL ≤ 8 . 3 ⁢ 2 .
  7. 7 . The camera optical lens as described in claim 1 , wherein an object side surface of the fourth lens is convex in a paraxial region, and an image side surface of the fourth lens is concave in the paraxial region; and a central curvature radius of the object side surface of the fourth lens is R7, a central curvature radius of the image side surface of the fourth lens is R8, and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and following relational expressions are satisfied: - 1.76 ≤ f ⁢ 4 / f ≤ - 0.48 ; 0.97 ≤ ( R ⁢ 7 + R ⁢ 8 ) / ( R ⁢ 7 - R ⁢ 8 ) ≤ 3.63 ; and 1.1 ≤ d ⁢ 7 / TTL ≤ 4 . 7 ⁢ 6 .
  8. 8 . The camera optical lens as described in claim 1 , wherein an F number FNO of the camera optical lens is smaller than or equal to 2.96.
  9. 9 . The camera optical lens as described in claim 1 , wherein a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and an image height of the camera optical lens is defined as IH, and a following relational expression is satisfied: TTL / IH ≤ 1.67 .
  10. 10 . The camera optical lens as described in claim 1 , wherein a combined focal length of the first lens and the second lens is f12, and a following relational expression is satisfied: 0.52 ≤ f ⁢ 12 / f ≤ 1.82 .

Description

TECHNICAL FIELD The present disclosure relates to the field of optical lens and, in particular, to a camera optical lens applied to handheld terminal devices such as smart phones, digital cameras, and camera devices such as monitors, PC lenses. BACKGROUND In recent years, with the rise of various smart devices, the demand for a miniaturized camera optical lens has gradually increased. Since pixel size of the optical sensor is reduced, and the current electronic product has a development trend of light weight, thinness and being portable, the miniaturized camera optical lens with good imaging quality has become a mainstream of the current market. In order to obtain better imaging quality, a multi-lens structure is mostly used. In addition, with the development of technology and the increase of user's diversified requirements, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirements on the imaging quality of the system are continuously improved, a structure with four lenses gradually appears in the lens design. There is an urgent need for a camera optical lens having excellent optical performance. SUMMARY In view of the above problems, an object of the present disclosure is to provide a camera optical lens meeting design requirements of excellent optical performance. In order to solve the above technical problem, the present disclosure provides a camera optical lens. The camera optical lens includes a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power. A focal length of the camera optical lens is defined as f, a focal length of the first lens is defined as f1, a focal length of the second lens is defined as f2, a focal length of the third lens is defined as f3, a focal length of the fourth lens is defined as f4, a combined focal length of the second lens, the third lens and the fourth lens is defined as f234, a central curvature radius of an object side surface of the second lens is R3, a central curvature radius of an image side surface of the second lens is R4, an on-axis thickness of the first lens is defined as d1, an on-axis thickness of the second lens is defined as d3, an on-axis thickness of the third lens is d5, an on-axis thickness of the fourth lens is defined as d7, and following relational expressions are satisfied: 0.65≤f⁢1/f≤0.85;-1.5≤(f⁢3-f⁢4)/f⁢2≤-0.80;0.20≤(R⁢3+R⁢4)/f⁢2≤0.80;2.≤d⁢1/d⁢3≤7.00;and-3.5≤f⁢2⁢3⁢4/(d⁢3+d⁢5+d⁢7)≤-2.5⁢0. As an improvement, a central curvature radius of an object side surface of the third lens is defined as R5, and a central curvature radius of an image side surface of the third lens is defined as R6, and a following relational expression is satisfied: 2.≤(R⁢5+R⁢6)/(R⁢5-R⁢6)≤3.. As an improvement, a sum of on-axis thicknesses of the first lens, the second lens, the third lens, and the fourth lens is ΣTi, and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and a following relational expression is satisfied: 0.5≤∑Ti /TTL≤0.7. As an improvement, an object side surface of the first lens is convex in a paraxial region, and an image side surface of the first lens is convex in the paraxial region; and an on-axis thickness of the first lens is d1, a central curvature radius of an object side surface of the first lens is R1, a central curvature radius of an image side surface of the first lens is R2, and a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and the following relational expressions are satisfied: -1.41≤(R⁢1+R⁢2)/(R⁢1-R⁢2)≤-0.28;and1.63≤d⁢1/TTL≤6.1⁢7. As an improvement, an object side surface of the second lens is concave in a paraxial region, and an image side surface of the second lens is concave in the paraxial region; and the total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and the following relational expressions are satisfied: -4.23≤f⁢2/f≤-0.84;0.04≤(R⁢3+R⁢4)/(R⁢3-R⁢4)≤0.42;and0.3≤d⁢3/TTL≤2.7⁢9. As an improvement, an object side surface of the third lens is concave in a paraxial region, and an image side surface of the third lens is convex in the paraxial region; and the total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis is TTL, and the following relational expressions are satisfied: 0.39≤f⁢3/f≤1.51;and1.83≤d⁢5/TTL≤8.32. As an improvement, an object side surface of the fourth lens is convex in a paraxial region, and an image side surface of the fourth lens is concave in the paraxial region; a central curvature radius of the object side surface of the fourth lens is R7, a central curvature radius of the image side s