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US-20260126625-A1 - CAMERA OPTICAL LENS

US20260126625A1US 20260126625 A1US20260126625 A1US 20260126625A1US-20260126625-A1

Abstract

The present disclosure relates to the field of optical lenses, and discloses a camera optical lens sequentially including five lenses 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, a fourth lens having refractive power, and a fifth lens having negative refractive power; and following relational expressions are satisfied: 0.50≤(R5+R6)/(R5-R6)≤0.81, −4.00≤(f2+f5)/f≤−2.50, 0.60≤d9/d8≤2.00, 2.80≤R9/R10≤6.00, and −8.00≤(R7+R8)/f≤−4.00. The camera optical lens provided by the present disclosure can satisfy the design requirements of large aperture, ultra-thinness and wide angle.

Inventors

  • LU PAN
  • Yinghui YUAN

Assignees

  • CHANGZHOU AAC RAYTECH OPTRONICS CO., LTD.

Dates

Publication Date
20260507
Application Date
20250318

Claims (10)

  1. 1 . A camera optical lens, comprising five lenses from an object side to an image side in sequence: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having refractive power, and a fifth lens having negative refractive power; and wherein a focal length of the camera optical lens is defined as f, a focal length of the second lens is f 2 , a focal length of the fifth lens is f 5 , an on-axis distance from an image side surface of the fourth lens to an object side surface of the fifth lens is defined as d 8 , an on-axis thickness of the fifth lens is defined as d 9 , a central curvature radius of an object side surface of the third lens is defined as R 5 , and a central curvature radius of an image side surface of the third lens is defined as R 6 , a central curvature radius of an object side surface of the fourth lens is defined as R 7 , a central curvature radius of an image side surface of the fourth lens is defined as R 8 , a central curvature radius of an object side surface of the fifth lens is defined as R 9 , a central curvature radius of an image side surface of the fifth lens is defined as R 10 , and following relational expressions are satisfied: 0.5 ≤ ( R ⁢ 5 + R ⁢ 6 ) / ( R ⁢ 5 - R ⁢ 6 ) ≤ 0.81 ; - 4. ⁢ 0 ≤ ( f ⁢ 2 + f ⁢ 5 ) / f ≤ - 2 .50 ; 0.6 ≤ d ⁢ 9 / d ⁢ 8 ≤ 2 .00 ; 2.8 ≤ R ⁢ 9 / R ⁢ 10 ≤ 6. ; and - 8. ⁢ 0 ≤ ( R ⁢ 7 + R ⁢ 8 ) / f ≤ - 4 . 0 ⁢ 0 .
  2. 2 . The camera optical lens as described in claim 1 , wherein an on-axis thickness of the second lens is defined as d 3 , an on-axis thickness of the third lens is defined as d 5 , an on-axis thickness of the fourth lens is defined as d 7 , and a following relational expression is satisfied: 5. ≤ ( d ⁢ 5 + d ⁢ 7 ) / d ⁢ 3 ≤ 8 . 0 ⁢ 0 .
  3. 3 . 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 defined as TTL, and a following relational expression is satisfied: 1.05 ≤ TTL / f ≤ 1.35 .
  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 concave in the paraxial region; and a focal length of the first lens is defined as f 1 , a central curvature radius of the object side surface of the first lens is defined as R 1 , a central curvature radius of the image side surface of the first lens is defined as R 2 , an on-axis thickness of the first lens is defined as d 1 , 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 defined as TTL, and following relational expressions are satisfied: 0.36 ≤ f ⁢ 1 / f ≤ 1.46 ; - 3.2 ≤ ( R ⁢ 1 + R ⁢ 2 ) / ( R ⁢ 1 - R ⁢ 2 ) ≤ - 0 .69 ; and 0.07 ≤ d ⁢ 1 / TTL ≤ 0 . 2 ⁢ 5 .
  5. 5 . The camera optical lens as described in claim 1 , wherein an object side surface of the second lens is convex in a paraxial region, and an image side surface of the second lens is concave in the paraxial region; and a central curvature radius of an object side surface of the second lens is defined as R 3 , a central curvature radius of an image side surface of the second lens is defined as R 4 , an on-axis thickness of the second lens is d 3 , 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 defined as TTL, and following relational expressions are satisfied: - 6 . 0 ⁢ 7 ≤ f ⁢ 2 / f ≤ - 1.14 ; 1.37 ≤ ( R ⁢ 3 + R ⁢ 4 ) / ( R ⁢ 3 - R ⁢ 4 ) ≤ 5.07 ; and 0.02 ≤ d ⁢ 3 / TTL ≤ 0 . 0 ⁢ 8 .
  6. 6 . The camera optical lens as described in claim 1 , wherein an object side surface of the third lens is convex in a paraxial region, and an image side surface of the third lens is convex in the paraxial region; and a focal length of the third lens is defined as f 3 , an on-axis thickness of the third lens is defined as d 5 , 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 defined as TTL, and following relational expressions are satisfied: 2.31 ≤ f ⁢ 3 / f ≤ 19.9 ; and 0.06 ≤ d ⁢ 5 / TTL ≤ 0 . 2 ⁢ 5 .
  7. 7 . The camera optical lens as described in claim 1 , wherein an object side surface of the fourth lens is concave in a paraxial region, and an image side surface of the fourth lens is convex in the paraxial region; and a focal length of the fourth lens is f 4 , and an on-axis thickness of the fourth lens is defined as d 7 , 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 defined as TTL, and following relational expressions are satisfied: - 3 ⁢ 9 . 5 ⁢ 0 ≤ f ⁢ 4 / f ≤ 1.97 ; - 10. ⁢ 8 ⁢ 0 ≤ ( R ⁢ 7 + R ⁢ 8 ) / ( R ⁢ 7 - R ⁢ 8 ) ≤ 2.11 ; and 0.06 ≤ d ⁢ 7 / TTL ≤ 0 . 2 ⁢ 5 .
  8. 8 . The camera optical lens as described in claim 1 , wherein an object side surface of the fifth lens is convex in a paraxial region, and an image side surface of the fifth 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 defined as TTL, and following relational expressions are satisfied: - 1.84 ≤ f ⁢ 5 / f ≤ - 0.53 ; and 0.05 ≤ d ⁢ 9 / TTL ≤ 0 . 2 ⁢ 0 .
  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 defined as TTL, and a maximum image height of the camera optical lens is defined as IH, and a following relational expression is satisfied: TTL / IH ≤ 1.79 .
  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 defined as f 12 , and a following relational expression is satisfied: 0.43 ≤ f ⁢ 12 / f ≤ 2 . 1 ⁢ 7 .

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 five lenses gradually appears in the lens design. There is an urgent need for a camera optical lens with excellent optical performance, small size, and fully corrected aberrations. SUMMARY In view of the above problems, a main object of the present disclosure is to provide a camera optical lens, meeting design requirements of large aperture, ultra-thinness and wide angle while having excellent optical performance. In order to realize the above object, the technical solutions of the present disclosure provide a camera optical lens. The camera optical lens sequentially including five lenses 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, a fourth lens having refractive power, and a fifth lens having negative refractive power. A focal length of the camera optical lens is defined as f, a focal length of the second lens is f2, a focal length of the fifth lens is f5, an on-axis distance from an image side surface of the fourth lens to an object side surface of the fifth lens is defined as d8, an on-axis thickness of the fifth lens is defined as d9, 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, a central curvature radius of an object side surface of the fourth lens is defined as R7, a central curvature radius of an image side surface of the fourth lens is defined as R8, a central curvature radius of an object side surface of the fifth lens is defined as R9, a central curvature radius of an image side surface of the fifth lens is defined as R10, and following relational expressions are satisfied: 0.5⩽(R⁢5+R⁢6)/(R⁢5-R⁢6)⩽0.81;-4.⩽(f⁢2+f⁢5)/f⩽-2.5;0.6⩽d⁢9/d⁢8⩽2.;2.8⩽R⁢9/R⁢10⩽6.;and-8.⩽(R⁢7+R⁢8)/f⩽-4.. As an improvement, an on-axis thickness of the second lens is defined as d3, an on-axis thickness of the third lens is defined as d5, an on-axis thickness of the fourth lens is defined as d7, and a following relational expression is satisfied: 5.⩽(d⁢5+d⁢7)/d⁢3⩽8.. As an improvement, 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 defined as TTL, and a following relational expression is satisfied: 1.05⩽TTL/f⩽1.35. 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 concave in the paraxial region; and a focal length of the first lens is defined as f1, a central curvature radius of the object side surface of the first lens is defined as R1, a central curvature radius of the image side surface of the first lens is defined as R2, an on-axis thickness of the first lens is defined as d1, 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 defined as TTL, and following relational expressions are satisfied: 0.36⩽f⁢1/f⩽1.46;-3.2⩽(R⁢1+R⁢2)/(R⁢1-R⁢2)⩽-0.69; and0.07⩽d⁢1/TTL⩽0.25. As an improvement, an object side surface of the second lens is convex in a paraxial region, and an image side surface of the second lens is concave in the paraxial region; and a central curvature radius of an object side surface of the second lens is defined as R3, a central curvature radius of an image side surface of the second lens is defined as R4, an on-axis thickness of the second lens is d3, 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 defined as TTL, and following relational expressions are satisfied: -6.07⩽f⁢2/f⩽-1.14;1.37⩽(R⁢3+R⁢4)/(R⁢3-R⁢4 )⩽5.07;and0.02⩽d⁢3/TTL⩽0.08. As an improvement, an object side surface of the third lens is convex in a paraxial region, and an image side surface of the third lens is convex in the par