Photographing optical lens assembly
A photographing optical lens assembly includes, in order from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, a third lens element having a concave image-side surface, wherein at least one of the object-side surface and the image-side surface of the third lens element is aspheric, a fourth lens element with positive refractive power having a convex image-side surface, wherein at least one of the object-side surface and the image-side surface of the fourth lens element is aspheric, and a fifth lens element with negative refractive power having a concave image-side surface, wherein at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric.
1. A photographing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power;
a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
a third lens element having a concave image-side surface, wherein at least one of an object-side surface and the concave image-side surface of the third lens element is aspheric;
a fourth lens element with positive refractive power having a convex image-side surface, wherein at least one of an object-side surface and the convex image-side surface of the fourth lens element is aspheric; and
a fifth lens element with negative refractive power having a concave image-side surface, wherein at least one of an object-side surface and the concave image-side surface of the fifth lens element is aspheric;
wherein a focal length of the fourth lens element is f 4 , a focal length of the photographing optical lens assembly is f, a curvature radius of the object-side surface of the second lens element is R 3 , a curvature radius of the image-side surface of the third lens element is R 6 , a curvature radius of the object-side surface of the fourth lens element is R 7 , and they satisfy the following relationships:
0.3 <f 4 /f< 0.8;
0.3 <f/R 3<2.0; and
0.0 <f /( R 6 −R 7)<0.5.
2. The photographing optical lens assembly of claim 1 , wherein at least one of the object-side surface and the image-side surface of the second lens element is aspheric, and the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof.
3. The photographing optical lens assembly of claim 2 , wherein the Abbe number of the first lens element is V 1 , the Abbe number of the second lens to element is V 2 , and they satisfy the following relationship:
26 <V 1 −V 2<40.
4. The photographing optical lens assembly of claim 3 , wherein the third lens element is with negative refractive power, and the fifth lens element is made of plastic material.
5. The photographing optical lens assembly of claim 3 , wherein the curvature radius of the object-side surface of the fourth lens element is R 7 , a curvature radius of the image-side surface of the fourth lens element is R 8 , and they satisfy the following relationship:
1.5<( R 7 +R 8)/( R 7 −R 8)<2.2.
6. The photographing optical lens assembly of claim 5 , wherein the focal length of the fourth lens element is f 4 , the focal length of the photographing optical lens assembly is f, and they satisfy the following relationship:
0.3 <f 4 /f< 0.55.
7. The photographing optical lens assembly of claim 6 , wherein an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , and they satisfy the following relationship:
0.0< T 12 /T 23<0.5.
8. The photographing optical lens assembly of claim 5 , wherein a focal length of the fifth lens element is f 5 , the focal length of the photographing optical lens assembly is f, and they satisfy the following relationship:
−0.6 <f 5 /f<− 0.25.
9. The photographing optical lens assembly of claim 1 , further comprising:
a stop, an axial distance between the stop and the image plane is SL, an axial distance between the object-side surface of the first lens element and the image plane is TTL, and they satisfy the following relationship:
0.7 <SL/TTL< 1.1.
10. The photographing optical lens assembly of claim 9 , wherein a thickness near the optical axis of the fourth lens element is CT 4 , an axial distance between the third lens element and the fourth lens element is T 34 , and they satisfy the following relationship:
3.2 <CT 4 /T 34<12.5.
11. The photographing optical lens assembly of claim 1 , further comprising:
an image sensor located on the image plane, wherein a half of a diagonal length of an effective photosensitive area of the image sensor is ImgH, and the axial distance between the object-side surface of the first lens element and the image plane is TTL, and they satisfy the following relationship:
TTL/ImgH< 1.85.
12. The photographing optical lens assembly of claim 1 , wherein the focal length of the photographing optical lens assembly is f, the focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , and they satisfy the following relationship:
3.0<( f/f 4)−( f/f 5)<6.0.
13. A photographing optical lens assembly comprising, in order from an object side to an image side:
a first lens element with positive refractive power;
a second lens element with negative refractive power having a concave image-side surface;
a third lens element having a concave image-side surface, wherein at least one of an object-side surface and the image-side surface of the third lens element is aspheric;
a fourth lens element with positive refractive power having a convex image-side surface, wherein at least one of an object-side surface and the image-side surface of the fourth lens element is aspheric; and
a fifth lens element with negative refractive power having a concave image-side surface, wherein at least one of an object-side surface and the image-side surface of the fifth lens element is aspheric;
wherein a focal length of the fourth lens element is f 4 , a focal length of the photographing optical lens assembly is f, a curvature radius of the image-side surface of the second lens element is R 4 , a curvature radius of the object-side surface of the fourth lens element is R 7 , a curvature radius of the image-side surface of the fourth lens element is R 8 , a thickness near the optical axis of the fourth lens element is CT 4 , an axial distance between the third lens element and the fourth lens element is T 34 , and they satisfy the following relationships:
0.3 <f 4 /f< 0.8;
1.3 <f/R 4<3.8;
1.4<( R 7 +R 8)/( R 7 −R 8)<3.0; and
1.6 <CT 4 /T 34<18.0.
14. The photographing optical lens assembly of claim 13 , wherein the object-side surface and the image-side surface of the fourth lens element are aspheric, and the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof.
15. The photographing optical lens assembly of claim 14 , wherein a thickness near the optical axis of the second lens element is CT 2 , a thickness near the optical axis of the third lens element is CT 3 , the focal length of the photographing optical lens assembly is f, and they satisfy the following relationship:
0.8<(( CT 2 +CT 3)/ f )*10<2.0.
16. The photographing optical lens assembly of claim 15 , wherein the curvature radius of the object-side surface of the fourth lens element is R 7 , the curvature radius of the image-side surface of the fourth lens element is R 8 , and they satisfy the following relationship:
1.5<( R 7 +R 8)/( R 7 −R 8)<2.2.
17. The photographing optical lens assembly of claim 14 , wherein the focal length of the photographing optical lens assembly is f, a curvature radius of the object-side surface of the second lens element is R 3 , and they satisfy the following relationship:
0.35 <f/R 3<1.5.
18. The photographing optical lens assembly of claim 14 , wherein a thickness near the optical axis of the fourth lens element is CT 4 , an axial distance between the third lens element and the fourth lens element is T 34 , and they satisfy the following relationship:
3.2 <CT 4 /T 34<12.5.
19. The photographing optical lens assembly of claim 13 , wherein the third lens element is with negative refractive power, and the fifth lens element is made of plastic material.
20. The photographing optical lens assembly of claim 13 , further comprising:
a stop, an axial distance between the stop and the image plane is SL, an axial distance between the object-side surface of the first lens element and the image plane is TTL, and they satisfy the following relationship:
0.7 <SL/TTL< 1.1.
21. The photographing optical lens assembly of claim 20 , wherein the curvature radius of the object-side surface of the second lens element is R 3 , the curvature radius of the image-side surface of the second lens element is R 4 , and they satisfy the following relationship:
0.0 <R 4 /R 3<0.5.
22. The photographing optical lens assembly of claim 13 , wherein the focal length of the photographing optical lens assembly is f, a curvature radius of the image-side surface of the third lens element is R 6 , the curvature radius of the object-side surface of the fourth lens element is R 7 , and they satisfy the following relationship:
0.0 <f /( R 6 −R 7)<0.5.