Photographing optical lens assembly, image capturing unit and electronic device

Abstract

A photographic optical lens assembly includes three lenses. The three lenses are sequentially arranged from the object side to the image side along the optical path: a first lens, a second lens, and a third lens. Each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. The third lens has negative refractive power, its image-side surface is concave near the optical axis, and its image-side surface has at least one inflection point. Under certain conditions, the photographic optical lens assembly can simultaneously meet the requirements of miniaturization and high image quality.

Claims

1. A photographic optical lens assembly comprising three lenses, which are sequentially arranged from the object side to the image side as a first lens, a second lens, and a third lens along a light path, and each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, The first lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. The third lens has negative refractive power, its image-side surface is concave near the optical axis, and its image-side surface has at least one inflection point. The second lens has an Abbe number of V2, the third lens has an Abbe number of V3, the second lens has a focal length of f2, the third lens has a focal length of f3, the thickness of the third lens along the optical axis is CT3, the distance between the first and second lenses along the optical axis is T12, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6. These conditions must be met: 10.0 < V2 + V3 < 70.0; 0 < 10×|f3 / f2| < 4.50; 0.40 < CT3 / T12 < 2.50; -3.00 < (R2-R3) / (R2+R3) < 0; and 0 < (R5+R6) / (R5-R6) < 2.

00.

2. The photographic optical lens group as described in claim 1, wherein the Abbe number of the second lens is V2 and the Abbe number of the third lens is V3, which satisfy the following condition: 20.0 < V2 + V3 < 65.

0.

3. The photographic optical lens assembly as described in claim 1, wherein the image-side surface of the second lens is convex near the optical axis; wherein, The second lens has a focal length of f2, and the third lens has a focal length of f3, satisfying the following condition: 0.01 < 10 × |f3 / f2| < 3.

00.

4. The photographic optical lens assembly as described in claim 1, wherein the object-side surface of the third lens is concave near the optical axis; wherein, The thickness of the third lens on the optical axis is CT3, and the distance between the first lens and the second lens on the optical axis is T12, which satisfies the following condition: 0.60 < CT3 / T12 < 1.

75.

5. The photographic optical lens group as described in claim 1, wherein the focal length of the photographic optical lens group is f, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfies the following condition: 0.30 < |f / R3|+|f / R4| < 1.

00.

6. The photographic optical lens assembly as described in claim 1, wherein the radius of curvature of the image-side surface of the first lens is R2 and the radius of curvature of the object-side surface of the second lens is R3, which satisfies the following condition: -2.60 < (R2-R3) / (R2+R3) < -0.

25.

7. The photographic optical lens assembly as described in claim 1, wherein the thickness of the first lens on the optical axis is CT1 and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 1.30 < CT1 / CT2 < 2.

30.

8. The photographic optical lens group as described in claim 1, wherein the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: 0.50 < T23 / CT3 < 1.

30.

9. The photographic optical lens group as described in claim 1, wherein the Abbe number of the second lens is V2, which satisfies the following condition: 10.0 < V2 < 25.

0.

10. The photographic optical lens group as described in claim 1, wherein the maximum effective radius of the image-side surface of the third lens is Y3R2, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: 1.50 < Y3R2 / CT3 < 4.

00.

11. The photographic optical lens assembly as described in claim 1, wherein the displacement of the point where the object-side surface of the second lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the second lens parallel to the optical axis is Sag2R1, the displacement of the point where the image-side surface of the second lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the second lens parallel to the optical axis is Sag2R2, and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 0.03 < (|Sag2R1|+|Sag2R2|) / CT2 < 0.

25.

12. An image capturing device comprising: a photographic optical lens group as described in claim 1; and an electronic photosensitive element disposed on an imaging surface of the photographic optical lens group.

13. An electronic device comprising: an image capturing device as described in claim 12.

14. A photographic optical lens assembly comprising three lenses, which are sequentially arranged from the object side to the image side along a light path as a first lens, a second lens, and a third lens, and each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, The first lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. The third lens has negative refractive power, its image-side surface is concave near the optical axis, and its image-side surface has at least one critical point off-axis. The second lens has an Abbe number of V2, the third lens has an Abbe number of V3, the focal length of the photographic optical lens group is f, the focal length of the second lens is f2, the focal length of the third lens is f3, the radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the second lens is R3, satisfying the following conditions: 10.0 < V2 + V3 < 70.0; 0 < 10 × |f3 / f2| < 4.50; 0.80 < f / R2 < 2.50; and -3.00 < (R2-R3) / (R2+R3) < 0; where the Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the i-th lens is Vi, the refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the i-th lens is Ni, and at least one lens in the photographic optical lens group satisfies the following condition: 5.00 < Vi / Ni < 14.50, where i = 1, 2 or 3.

15. The photographic optical lens group as described in claim 14, wherein the Abbe number of the second lens is V2 and the Abbe number of the third lens is V3, which satisfy the following condition: 20.0 < V2 + V3 < 65.

0.

16. The photographic optical lens group as claimed in claim 14, wherein the focal length of the photographic optical lens group is f, and the radius of curvature of the image-side surface of the first lens is R2, which satisfies the following condition: 0.90 < f / R2 < 2.

30.

17. A photographic optical lens group as described in claim 14, wherein the Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the i-th lens is Vi, the refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the i-th lens is Ni, and at least one lens in the photographic optical lens group satisfies the following condition: 8.00 < Vi / Ni < 12.50, where i = 1, 2 or 3.

18. The photographic optical lens group as described in claim 14, wherein the maximum thickness of each lens in the photographic optical lens group on the optical axis is CTmax, and the minimum thickness of each lens in the photographic optical lens group on the optical axis is CTmin, which satisfies the following condition: 1.45 < CTmax / CTmin < 2.

20.

19. The photographic optical lens assembly as claimed in claim 14, wherein the radius of curvature of the object-side surface of the first lens is R1, and the thickness of the first lens on the optical axis is CT1, which satisfies the following condition: 1.00 < R1 / CT1 < 1.

50.

20. The photographic optical lens assembly as claimed in claim 14, wherein the object-side surface of the second lens is concave near the optical axis; wherein, The distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL, and the maximum imaging height of the photographic optical lens group is ImgH, which satisfies the following condition: 1.40 < TL / ImgH < 2.

00.

21. The photographic optical lens group as described in claim 14, wherein the entrance pupil diameter of the photographic optical lens group is EPD, the maximum imaging height of the photographic optical lens group is ImgH, and the following conditions are satisfied: 0.70 < EPD / ImgH < 0.

90.

22. A photographic optical lens assembly comprising three lenses, which are sequentially arranged from the object side to the image side as a first lens, a second lens, and a third lens along a light path, and each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, The first lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. The third lens has negative refractive power, its image-side surface is concave near the optical axis, and its image-side surface has at least one critical point off-axis. The second lens has an Abbe number of V2, the third lens has an Abbe number of V3, the second lens has a focal length of f2, the third lens has a focal length of f3, the first lens has a radius of curvature of R2 on its image-side surface, the second lens has a radius of curvature of R3 on its object-side surface, and the third lens has a radius of curvature of R6 on its image-side surface. The distance from the object-side surface of the first lens to the image-side surface of the third lens on the optical axis is TD. The entrance pupil diameter of the photographic optical lens group is EPD, which satisfies the following conditions: 10.0 < V2 + V3 < 70.0; 0 < 10 × |f3 / f2| < 7.00; -3.00 < (R2-R3) / (R2+R3) < 0; 0 < R2 / R6 < 2.00; and 1.00 < TD / EPD < 1.

80.

23. The photographic optical lens group as described in claim 22, wherein the Abbe number of the second lens is V2 and the Abbe number of the third lens is V3, which satisfy the following condition: 30.0 < V2 + V3 < 63.

0.

24. The photographic optical lens group as described in claim 22, wherein the radius of curvature of the image-side surface of the first lens is R2 and the radius of curvature of the image-side surface of the third lens is R6, which satisfy the following condition: 0.50 < R2 / R6 < 1.

75.

25. The photographic optical lens group as claimed in claim 22, wherein the focal length of the photographic optical lens group is f, and the radius of curvature of the image-side surface of the third lens is R6, which satisfies the following condition: 0.70 < f / R6 < 2.

00.

26. The photographic optical lens group as described in claim 22, wherein the thickness of the first lens on the optical axis is CT1, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following condition: 1.40 < CT1 / T23 < 2.

40.

27. The photographic optical lens group as described in claim 22, wherein the aperture value of the photographic optical lens group is FNO, and half of the maximum field of view in the photographic optical lens group is HFOV, which satisfies the following conditions: 1.80 < FNO < 2.20; and 26.0 degrees < HFOV < 35.0 degrees.

28. The photographic optical lens group as claimed in claim 22, wherein the distance on the optical axis from the object-side surface of the first lens to an imaging plane is TL, and the focal length of the photographic optical lens group is f, which satisfies the following conditions: 0.500 mm < TL < 1.800 mm; and 0.80 mm < f < 1.50 mm.

29. A photographic optical lens group as described in claim 22, wherein the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the focal length of the photographic optical lens group is f, the focal length of the second lens is f2, the focal length of the third lens is f3, the thickness of the third lens on the optical axis is CT3, the optical axis spacing between the first lens and the second lens is T12, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the optical axis distance from the object-side surface of the first lens to the image-side surface of the third lens is TD, and the entrance pupil diameter of the photographic optical lens group is EPD, which satisfies the following conditions: 36.7 ≤ V2+V3 ≤ 60.9; 0.11 ≤ 10×|f3 / f2| ≤ 3.99; 0.81 ≤ CT3 / T12 ≤ 2.10; 0.37 ≤ (R5+R6) / (R5-R6) ≤ 1.52; 1.07 ≤ f / R2 ≤ 2.06; 0.69 ≤ R2 / R6 ≤ 1.50; and 1.56 ≤ TD / EPD ≤ 1.68; where, The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the i-th lens is Vi, the refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, and the refractive index of the i-th lens is Ni. At least one lens in the photographic optical lens group satisfies the following condition: 9.61 ≤ Vi / Ni ≤ 14.34, where i = 1, 2, or 3.

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