Optical image lens assembly, image capturing unit and electronic device

1. An optical image lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, the image-side surface of the sixth lens element is concave in a paraxial region thereof, at least one of the object-side surface and the image-side surface of at least one lens element of the optical image lens assembly has at least one inflection point, and a thickness along an optical axis of the first lens element is a maximum value among thicknesses along the optical axis of all lens elements of the optical image lens assembly; and

wherein a distance along the optical axis between the image-side surface of the sixth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, an Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, a focal length of the optical image lens assembly is f, a focal length of the third lens element is f3, a curvature radius of the object-side surface of the sixth lens element is R11, a curvature radius of the image-side surface of the sixth lens element is R12, and the following conditions are satisfied:

1.0< BL/TD< 5.0;

0.10< V 5/ V 6<1.80;

−5.0< f/f 3<1.80; and

−0.50<( R 11− R 12)/( R 11+ R 12)<0.50.

2. The optical image lens assembly of claim 1 , wherein the object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has negative refractive power, and at least one of the object-side surface and the image-side surface of the sixth lens element has at least one inflection point.

3. The optical image lens assembly of claim 1 , wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, the Abbe number of the fifth lens element is V5, the Abbe number of the sixth lens element is V6, an Abbe number of the i-th lens element is Vi, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the third lens element is N3, a refractive index of the fourth lens element is N4, a refractive index of the fifth lens element is N5, a refractive index of the sixth lens element is N6, a refractive index of the i-th lens element is Ni, a minimum value of Vi/Ni is (Vi/Ni) min, and at least one lens element of the optical image lens assembly satisfies the following condition:

3.0<( Vi/Ni )min<12.0, wherein i= 1,2,3,4,5 or 6.

4. The optical image lens assembly of claim 1 , wherein a curvature radius of the image-side surface of the fifth lens element is R10, the curvature radius of the object-side surface of the sixth lens element is R11, and the following condition is satisfied:

−0.10<( R 10+ R 11)/( R 10− R 11)<1.30.

5. The optical image lens assembly of claim 1 , wherein the thickness along the optical axis of the first lens element is CT1, a maximum value among distances along the optical axis between each of all adjacent lens elements of the optical image lens assembly is ATmax, and the following condition is satisfied:

1.0< CT 1/ AT max<5.0.

6. The optical image lens assembly of claim 1 , wherein a distance along the optical axis between the object-side surface of the first lens element and the image surface is TL, the focal length of the optical image lens assembly is f, and the following condition is satisfied:

0.70< TL/f< 1.05.

7. The optical image lens assembly of claim 1 , wherein an entrance pupil diameter of the optical image lens assembly is EPD, a maximum effective radius of the object-side surface of the first lens element is Y11, and the following condition is satisfied:

1.60<EPD/ Y 11<2.10.

8. The optical image lens assembly of claim 1 , wherein an entrance pupil diameter of the optical image lens assembly is EPD, a sum of distances along the optical axis between each of all adjacent lens elements of the optical image lens assembly is ΣAT, and the following condition is satisfied:

2.20<EPD/Σ AT.

9. The optical image lens assembly of claim 1 , wherein the distance along the optical axis between the image-side surface of the sixth lens element and the image surface is BL, a maximum image height of the optical image lens assembly is ImgH, the focal length of the optical image lens assembly is f, and the following conditions are satisfied:

2.0< BL /Img H <5.5; and

2.6< f /Img H <15.0.

10. The optical image lens assembly of claim 1 , wherein a maximum image height of the optical image lens assembly is ImgH, a maximum field of view of the optical image lens assembly is FOV, and the following condition is satisfied:

10.5 [mm]<Img H /tan(FOV)<30.0 [mm].

11. The optical image lens assembly of claim 1 , wherein at least one lens element of the optical image lens assembly is a non-circular lens element;

wherein a minimum distance from a center to an outer rim of the non-circular lens element is Dmin, a maximum distance from the center to the outer rim of the non-circular lens element is Dmax, and the following condition is satisfied:

D min/ D max<0.80.

12. An image capturing unit, comprising:

the optical image lens assembly of claim 1 ; and

an image sensor disposed on the image surface of the optical image lens assembly, wherein the image sensor has at least 40 megapixels.

13. An electronic device, comprising at least two image capturing units which face a same side, wherein the at least two image capturing units comprise:

a first image capturing unit, comprising the optical image lens assembly of claim 1 and an image sensor that is disposed on the image surface of the optical image lens assembly, wherein the image sensor has a resolution of at least 40 megapixels, the first image capturing unit achieves an equivalent focal length between 80 mm and 150 mm with the resolution of the image sensor, and the first image capturing unit achieves an equivalent focal length between 200 mm and 500 mm with a portion of the resolution of the image sensor, which is at least eight megapixels; and

a second image capturing unit, comprising an optical lens assembly and an image sensor that is disposed on an image surface of the optical lens assembly;

wherein a maximum field of view of the first image capturing unit and a maximum field of view of the second image capturing unit differ by at least 20 degrees.

14. An optical image lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, the image-side surface of the sixth lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one lens element of the optical image lens assembly has at least one inflection point; and

wherein a distance along an optical axis between the image-side surface of the sixth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, an Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, a focal length of the second lens element is f2, a focal length of the third lens element is f3, and the following conditions are satisfied:

0.70< BL/TD< 5.0;

0.10< V 5/ V 6<0.95; and

−0.70< f 2/ f 3<300.0.

15. The optical image lens assembly of claim 14 , wherein the object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has negative refractive power, and at least one of the object-side surface and the image-side surface of the sixth lens element has at least one inflection point.

16. The optical image lens assembly of claim 14 , wherein the image-side surface of the second lens element is concave in a paraxial region thereof, the image-side surface of the fifth lens element is convex in a paraxial region thereof, and there is an air gap along the optical axis between each of all adjacent lens elements of the optical image lens assembly.

17. The optical image lens assembly of claim 14 , wherein a minimum value among Abbe numbers of all lens elements of the optical image lens assembly is Vdmin, and the following condition is satisfied:

10.0< Vd min<21.0.

18. The optical image lens assembly of claim 14 , wherein a sum of distances along the optical axis between each of all adjacent lens elements of the optical image lens assembly is ΣAT, the distance along the optical axis between the image-side surface of the sixth lens element and the image surface is BL, and the following condition is satisfied:

Σ AT/BL< 0.30.

19. The optical image lens assembly of claim 14 , wherein a maximum value among maximum effective radii of all lens surfaces of the optical image lens assembly is Ymax, a minimum value among maximum effective radii of all lens surfaces of the optical image lens assembly is Ymin, and the following condition is satisfied:

1.0< Y max/ Y min<1.60.

20. The optical image lens assembly of claim 14 , wherein a maximum image height of the optical image lens assembly is ImgH, and the following condition is satisfied:

4.50 [mm]<Img H <10.0 [mm].

21. The optical image lens assembly of claim 14 , wherein an f-number of the optical image lens assembly is Fno, an entrance pupil diameter of the optical image lens assembly is EPD, and the following condition is satisfied:

25.0 [mm]< Fno ×EPD<40.0 [mm].

22. The optical image lens assembly of claim 14 , further comprising a reflective element.

23. An optical image lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, the image-side surface of the sixth lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one lens element of the optical image lens assembly has at least one inflection point; and

wherein a distance along an optical axis between the image-side surface of the sixth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, an Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, a focal length of the optical image lens assembly is f, a focal length of the third lens element is f3, and the following conditions are satisfied:

1.0< BL/TD< 5.0;

0.10< V 5/ V 6<0.95; and

−5.0< f/f 3<0.72.

24. The optical image lens assembly of claim 23 , wherein the image-side surface of the third lens element is concave in a paraxial region thereof; and

wherein a thickness along the optical axis of the first lens element is CT1, a thickness along the optical axis of the second lens element is CT2, and the following condition is satisfied:

1.50< CT 1/ CT 2<4.0.

25. The optical image lens assembly of claim 23 , wherein a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, and the following condition is satisfied:

0<( R 3− R 4)/( R 3+ R 4)<1.80.

26. The optical image lens assembly of claim 23 , wherein a maximum effective radius of the object-side surface of the first lens element is Y11, a maximum image height of the optical image lens assembly is ImgH, and the following condition is satisfied:

0.70< Y 11/Img H <1.20.

27. The optical image lens assembly of claim 23 , wherein half of a maximum field of view of the optical image lens assembly is HFOV, and the following condition is satisfied:

5.0 [deg.]< H FOV<15.0 [deg.].

28. The optical image lens assembly of claim 23 , wherein a vertical distance between an inflection point on the object-side surface of the sixth lens element and the optical axis is Y61i, a vertical distance between an inflection point on the image-side surface of the sixth lens element and the optical axis is Y62i, and at least one inflection point on the object-side surface of the sixth lens element and at least one inflection point on the image-side surface of the sixth lens element satisfy the following condition:

0.70< Y 61 i/Y 62 i< 1.50.

29. The optical image lens assembly of claim 23 , wherein the first lens element has a maximum effective radius of the object-side surface and a maximum effective radius of the image-side surface thereof, and one of the maximum effective radii of the first lens element is a maximum value among maximum effective radii on the object-side surfaces and the image-side surfaces of all lens elements of the optical image lens assembly.

30. An electronic device, comprising at least two image capturing units which face a same side, wherein the at least two image capturing units comprise:

a first image capturing unit, comprising:

an optical image lens assembly, comprising six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, and at least one of the object-side surface and the image-side surface of at least one lens element of the optical image lens assembly has at least one inflection point; and

wherein a minimum value among Abbe numbers of all lens elements of the optical image lens assembly is Vdmin, an f-number of the optical image lens assembly is Fno, an entrance pupil diameter of the optical image lens assembly is EPD, a maximum image height of the optical image lens assembly is ImgH, half of a maximum field of view of the optical image lens assembly is HFOV, and the following conditions are satisfied:

10.0< Vd min<21.0;

27.0 [mm]< Fno ×EPD<40.0 [mm];

4.50 [mm]<Img H <10.0 [mm]; and

5.0 [deg.]< H FOV<15.0 [deg.]; and

an image sensor, wherein the image sensor is disposed on an image surface of the optical image lens assembly; the image sensor has a resolution of at least 40 megapixels, the first image capturing unit achieves an equivalent focal length between 80 mm and 150 mm with the resolution of the image sensor, and the first image capturing unit achieves an equivalent focal length between 200 mm and 500 mm with a portion of the resolution of the image sensor, which is at least eight megapixels; and

a second image capturing unit, comprising an optical lens assembly and an image sensor that is disposed on an image surface of the optical lens assembly;

wherein a maximum field of view of the first image capturing unit and a maximum field of view of the second image capturing unit differ by at least 20 degrees.

31. An electronic device, comprising at least two image capturing units which face a same side, wherein the at least two image capturing units comprise:

a first image capturing unit, comprising:

an optical image lens assembly, comprising, in order from an object side to an image side along an optical path, a first lens element and a second lens element, and each of all lens elements of the optical image lens assembly having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the second lens element has negative refractive power, and at least one of the object-side surface and the image-side surface of at least one lens element of the optical image lens assembly has at least one inflection point; and

wherein a minimum value among Abbe numbers of all lens elements of the optical image lens assembly is Vdmin, an f-number of the optical image lens assembly is Fno, an entrance pupil diameter of the optical image lens assembly is EPD, a focal length of the optical image lens assembly is f, a maximum image height of the optical image lens assembly is ImgH, and the following conditions are satisfied:

10.0< Vd min<21.0;

25.0 [mm]< Fno ×EPD<45.0 [mm]; and

3.5< f /Img H <9.0; and

an image sensor, wherein the image sensor is disposed on an image surface of the optical image lens assembly, and the image sensor has a resolution of at least 40 megapixels; and

a second image capturing unit, comprising an optical lens assembly and an image sensor that is disposed on an image surface of the optical lens assembly;

wherein a maximum field of view of the first image capturing unit and a maximum field of view of the second image capturing unit differ by at least 20 degrees.

32. The electronic device of claim 31 , wherein the object-side surface of the first lens element is convex in a paraxial region thereof, and the image-side surface of the second lens element is concave in a paraxial region thereof;

wherein a maximum value among maximum effective radii of all lens surfaces of the optical image lens assembly is Ymax, a minimum value among maximum effective radii of all lens surfaces of the optical image lens assembly is Ymin, a maximum effective radius of the object-side surface of the first lens element is Y11, the maximum image height of the optical image lens assembly is ImgH, and the following conditions are satisfied:

1.0< Y max/ Y min<1.60; and

0.70< Y 11/Img H <1.20.

33. The electronic device of claim 31 , further comprising a reflective element, wherein each of at least two lens elements of the optical image lens assembly is a non-circular lens element;

wherein a minimum distance from a center to an outer rim of the non-circular lens element is Dmin, a maximum distance from the center to the outer rim of the non-circular lens element is Dmax, and the following condition is satisfied:

D min/ D max<0.80.

34. The electronic device of claim 31 , wherein the optical image lens assembly comprises at least five lens elements, and the resolution of the image sensor of the first image capturing unit is at least 100 megapixels.

35. The electronic device of claim 31 , wherein a ratio of an equivalent focal length of the first image capturing unit to an equivalent focal length of the second image capturing unit is larger than three.

36. The electronic device of claim 31 , wherein an optical axis of the first lens element and the second lens element of the first image capturing unit is perpendicular to an optical axis of the optical lens assembly of the second image capturing unit.

37. The electronic device of claim 31 , wherein the first image capturing unit achieves an equivalent focal length between 80 mm and 150 mm with the resolution of the image sensor, and the first image capturing unit achieves an equivalent focal length between 200 mm and 500 mm with a portion of the resolution of the image sensor, which is at least eight megapixels.