Optical lens assembly

1. An optical imaging lens set, from an object side toward an image side in order along an optical axis comprising: an aperture stop, 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, said first lens element to said sixth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:

said first lens element has refractive power, and at least one of its object-side surface as well as its image-side surface is aspheric;

said second lens element has refractive power, an image-side surface with a concave portion in a vicinity of its periphery and at least one of its object-side surface as well as its image-side surface is aspheric;

said third lens element has an object-side surface with a concave portion in a vicinity of its periphery and an image-side surface with a convex portion in a vicinity of the optical axis;

said fourth lens element has an image-side surface with a convex portion in a vicinity of the optical axis and at least one of its object-side surface as well as its image-side surface is aspheric;

said fifth lens element has positive refractive power, an object-side surface with a convex portion in a vicinity of the optical axis, and both its object-side surface and its image-side surface are aspheric; and

said sixth lens element has an object-side surface with a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of its periphery, and both its object-side surface and its image-side surface are aspheric, the optical imaging lens set exclusively has six lens elements, the first lens element has a first lens element thickness along said optical axis T 1 , the second lens element has a second lens element thickness along said optical axis T 2 , the third lens element has a third lens element thickness along said optical axis T 3 , the fourth lens element has a fourth lens element thickness along said optical axis T 4 , the sixth lens element has a sixth lens element thickness along said optical axis T 6 , an air gap G 23 between said second lens element and said third lens element along said optical axis and an air gap G 56 between said fifth lens element and said sixth lens element along said optical axis to satisfy (T 1 +T 2 +T 3 +T 4 )/T 6 ≤4.0 and (T 3 +T 6 )/(G 23 +G 56 )≤1.4.

2. The optical imaging lens set of claim 1 , wherein T 3 , T 6 and T 1 satisfy (T 3 +T 6 )/T 1 ≤1.9.

3. The optical imaging lens set of claim 1 , wherein the fifth lens element has a fifth lens element thickness along said optical axis T 5 to satisfy (T 3 +T 6 )/T 5 ≤2.1.

4. The optical imaging lens set of claim 1 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies (T 3 +T 6 )/G 12 ≤8.0.

5. The optical imaging lens set of claim 1 , wherein an air gap G 34 between said third lens element and said fourth lens element along said optical axis satisfies (T 3 +T 6 )/G 34 ≤2.8.

6. The optical imaging lens set of claim 1 , wherein T 3 , T 6 and G 56 satisfy (T 3 +T 6 )/G 56 ≤3.3.

7. The optical imaging lens set of claim 1 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies (T 3 +T 6 )/(G 12 +G 23 )≤1.8.

8. The optical imaging lens set of claim 1 , wherein T 3 , T 6 and T 2 satisfy (T 3 +T 6 )/T 2 ≤3.8.

9. The optical imaging lens set of claim 1 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies (T 4 +T 6 )/G 12 ≤5.5.

10. An optical imaging lens set, from an object side toward an image side in order along an optical axis comprising: an aperture stop, 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, said first lens element to said sixth lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:

said first lens element has refractive power, and at least one of its object-side surface as well as its image-side surface is aspheric;

said second lens element has refractive power, an image-side surface with a concave portion in a vicinity of its periphery and at least one of its object-side surface as well as its image-side surface is aspheric;

said third lens element has an object-side surface with a concave portion in a vicinity of its periphery and an image-side surface with a convex portion in a vicinity of the optical axis;

said fourth lens element has an image-side surface with a convex portion in a vicinity of the optical axis and at least one of its object-side surface as well as its image-side surface is aspheric;

said fifth lens element has positive refractive power, an object-side surface with a convex portion in a vicinity of the optical axis, an image-side surface with a concave portion in a vicinity of the optical axis and both its object-side surface and its image-side surface are aspheric; and

said sixth lens element has an object-side surface with a convex portion in a vicinity of its periphery, and both its object-side surface and its image-side surface are aspheric, the optical imaging lens set exclusively has six lens elements, the first lens element has a first lens element thickness along said optical axis T 1 , the second lens element has a second lens element thickness along said optical axis T 2 , the third lens element has a third lens element thickness along said optical axis T 3 , the fourth lens element has a fourth lens element thickness along said optical axis T 4 , the sixth lens element has a sixth lens element thickness along said optical axis T 6 , an air gap G 23 between said second lens element and said third lens element along said optical axis and an air gap G 56 between said fifth lens element and said sixth lens element along said optical axis to satisfy (T 1 +T 2 +T 3 +T 4 )/T 6 ≤4.0 and (T 3 +T 6 )/(G 23 +G 56 )≤1.4.

11. The optical imaging lens set of claim 10 , wherein T 3 , T 6 and T 1 satisfy (T 3 +T 6 )/T 1 ≤1.9.

12. The optical imaging lens set of claim 10 , wherein the fifth lens element has a fifth lens element thickness along said optical axis T 5 to satisfy (T 3 +T 6 )/T 5 ≤2.1.

13. The optical imaging lens set of claim 10 , wherein T 3 , T 6 and G 23 satisfy (T 4 +T 6 )/G 23 ≤1.8.

14. The optical imaging lens set of claim 10 , wherein an air gap G 34 between said third lens element and said fourth lens element along said optical axis satisfies (T 4 +T 6 )/G 34 ≤1.8.

15. The optical imaging lens set of claim 10 , wherein T 4 , T 6 and G 56 satisfy (T 4 +T 6 )/G 56 ≤2.5.

16. The optical imaging lens set of claim 10 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies T 3 /G 12 ≤2.9.

17. The optical imaging lens set of claim 10 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies T 4 /G 12 ≤2.6.

18. The optical imaging lens set of claim 10 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis and the fifth lens element with a fifth lens element thickness along said optical axis T 5 satisfy T 5 /G 12 ≤3.6.

19. The optical imaging lens set of claim 10 , wherein an air gap G 12 between said first lens element and said second lens element along said optical axis satisfies T 6 /G 12 ≤2.7.