Optical photographing lens assembly, image capturing device and electronic device
An optical photographing lens assembly includes, in order from an object side to an image side, 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. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are both aspheric. The sixth lens element with refractive power has an object-side surface and an image-side surface being both aspheric. The optical photographing lens assembly has a total of six lens elements with refractive power.
1. An optical photographing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side:
a first lens element;
a second lens element having positive refractive power;
a third lens element;
a fourth lens element;
a fifth lens element; and
a sixth lens element having an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the sixth lens element comprises at least one convex shape in an off-axis region thereof, and an object-side surface and the image-side surface of the sixth lens element are both aspheric;
wherein there is no relative movement among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element, there is an air gap between each of adjacent lens elements of the six lens elements, a half of a maximal field of view of the optical photographing lens assembly is HFOV, a focal length of the optical photographing lens assembly is f, an axial distance between an object-side surface of the first lens element and an image surface is TL, and the following conditions are satisfied:
10.0 degrees< HFOV <25.0 degrees; and
0.70< TL/f< 1.15.
2. The optical photographing lens assembly of claim 1 , wherein the third lens element has negative refractive power.
3. The optical photographing lens assembly of claim 1 , wherein a sum of all axial distances between adjacent lens elements of the six lens elements is ΣAT, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, and the following condition is satisfied:
5.0<Σ AT /( T 12+ T 23).
4. The optical photographing lens assembly of claim 1 , wherein the focal length of the optical photographing lens assembly is f, a maximum image height of the optical photographing lens assembly is ImgH, and the following condition is satisfied:
2.0< f/ImgH.
5. The optical photographing lens assembly of claim 4 , wherein both of an object-side surface and an image-side surface of each of the first lens element, the second lens element, the third lens element and the fourth lens element are aspheric, the six lens elements are made of plastic material, the focal length of the optical photographing lens assembly is f, the maximum image height of the optical photographing lens assembly is ImgH, and the following condition is satisfied:
2.15< f/ImgH <3.5.
6. The optical photographing lens assembly of claim 1 , wherein the third lens element has an image-side surface being concave in a paraxial region thereof.
7. The optical photographing lens assembly of claim 1 , wherein the second lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof.
8. The optical photographing lens assembly of claim 1 , wherein the focal length of the optical photographing lens assembly is f, a curvature radius of an image-side surface of the fifth lens element is R10, and the following condition is satisfied:
−1.25< R 10/ f< 0.
9. The optical photographing lens assembly of claim 1 , further comprising:
an aperture stop disposed between an imaged object and the third lens element.
10. The optical photographing lens assembly of claim 9 , wherein each of at least three surfaces of an object-side surface and an image-side surface of each of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element comprises at least one inflection point.
11. The optical photographing lens assembly of claim 10 , wherein an axial distance between the aperture stop and the image surface is SL, the axial distance between the object-side surface of the first lens element and the image surface is TL, and the following condition is satisfied:
0.85< SL/TL< 1.05.
12. The optical photographing lens assembly of claim 10 , wherein the object-side surface of the first lens element is convex in a paraxial region thereof.
13. The optical photographing lens assembly of claim 10 , wherein the first lens element has an image-side surface being convex in a paraxial region thereof.
14. The optical photographing lens assembly of claim 1 , wherein the fifth lens element has an object-side surface being concave in a paraxial region thereof.
15. The optical photographing lens assembly of claim 1 , wherein each of at least three of the six lens elements has negative refractive power.
16. An image capturing device, comprising:
the optical photographing lens assembly of claim 1 ; and
an image sensor, wherein the image sensor is disposed on the image surface of the optical photographing lens assembly.
17. An electronic device, comprising:
the image capturing device of claim 16 .
18. An optical photographing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side:
a first lens element;
a second lens element having positive refractive power;
a third lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof;
a fourth lens element having an image-side surface being concave in a paraxial region thereof;
a fifth lens element; and
a sixth lens element;
wherein there is no relative movement among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element, there is an air gap between each of adjacent lens elements of the six lens elements, each of at least three of the six lens elements has negative refractive power, a half of a maximal field of view of the optical photographing lens assembly is HFOV, a focal length of the optical photographing lens assembly is f, an axial distance between an object-side surface of the first lens element and an image surface is TL, and the following conditions are satisfied:
10.0 degrees< HFOV< 25.0 degrees; and
0.70< TL/f< 1.15.
19. The optical photographing lens assembly of claim 18 , wherein the fifth lens element has positive refractive power, and the sixth lens element has negative refractive power.
20. The optical photographing lens assembly of claim 18 , wherein a sum of all axial distances between adjacent lens elements of the six lens elements is ΣAT, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, and the following condition is satisfied:
5.0<Σ AT /( T 12+ T 23).
21. The optical photographing lens assembly of claim 18 , wherein the focal length of the optical photographing lens assembly is f, a maximum image height of the optical photographing lens assembly is ImgH, and the following condition is satisfied:
2.15< f/ImgH< 3.5.
22. The optical photographing lens assembly of claim 18 , wherein both of an object-side surface and an image-side surface of each of the first lens element, the second lens element, the third lens element and the fourth lens element are aspheric, the six lens elements are made of plastic material, the focal length of the optical photographing lens assembly is f, the maximum image height of the optical photographing lens assembly is ImgH, and the following condition is satisfied:
2 <f/ImgH.
23. The optical photographing lens assembly of claim 18 , wherein the fourth lens element has negative refractive power.
24. The optical photographing lens assembly of claim 18 , wherein the second lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof.
25. The optical photographing lens assembly of claim 18 , wherein the focal length of the optical photographing lens assembly is f, a curvature radius of an image-side surface of the fifth lens element is R10, and the following condition is satisfied:
−1.25< R 10/ f< 0.
26. The optical photographing lens assembly of claim 18 , further comprising:
an aperture stop disposed between an imaged object and the third lens element.
27. The optical photographing lens assembly of claim 18 , wherein each of at least three surfaces of an object-side surface and an image-side surface of each of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element comprises at least one inflection point.
28. The optical photographing lens assembly of claim 18 , further comprising:
an aperture stop, wherein an axial distance between the aperture stop and the image surface is SL, the axial distance between the object-side surface of the first lens element and the image surface is TL, and the following condition is satisfied:
0.85< SL/TL< 1.05.
29. An image capturing device, comprising:
the optical photographing lens assembly of claim 18 ; and
an image sensor, wherein the image sensor is disposed on the image surface of the optical photographing lens assembly.
30. An electronic device, comprising:
the image capturing device of claim 29 .