Optical imaging lens

1. An optical imaging lens, comprising a first lens element, a second lens element, a third lens element, and a fourth lens element, wherein each of the first to the fourth lens elements comprises an object-side surface, which faces the object side and allows an imaging ray to pass through, and an image-side surface, which faces an image side and allows the imaging ray to pass through, and wherein the first lens element is arranged to be a lens element having refracting power in a first order from the object side to the image side, the second lens element is arranged to be a lens element having refracting power in a second order from the object side to the image side, the third lens element is arranged to be a lens element having refracting power in a third order from the object side to the image side, and the fourth lens element is arranged to be a lens element having refracting power in a last order from the object side to the image side;

the first lens element has positive refracting power, and the object-side surface of the first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery;

the second lens element has negative refracting power;

the object-side surface of the third lens element has a concave portion in a vicinity of a periphery;

the fourth lens element has negative refracting power, and the image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery;

wherein the optical imaging lens satisfies:

HFOV≤25°;

TTL≤7.2 mm;

( T 1+ T 2+ T 3)/( G 12+ G 23)≤2.0; and

TTL/( T 1+ G 12+ T 2)≥4.50,

wherein HFOV is a half field of view of the optical imaging lens, TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, G12 is a distance from the image-side surface of the first lens element to the object-side surface of the second lens element along the optical axis, and G23 is a distance from the image-side surface of the second lens element-to the object-side surface of the third lens element along the optical axis.

2. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: T2/G34≤6.20, wherein G34 is a distance from the image-side surface of the third lens element to the object-side surface of the fourth lens element along the optical axis.

3. The optical imaging lens according to claim 2 , wherein the optical imaging lens further satisfies: F NO /T1≤3.50/mm, wherein F NO is an f-number of the optical imaging lens.

4. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/(G12+G23)≤7.20, wherein EFL is an effective focal length of the optical imaging lens.

5. The optical imaging lens according to claim 4 , wherein the optical imaging lens further satisfies: 2.50≤T1/T2.

6. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: (T2+T3)/T1≤1.20.

7. The optical imaging lens according to claim 6 , wherein the optical imaging lens further satisfies: EFL/F NO ≥1.80 mm, wherein EFL is the effective focal length of the optical imaging lens and F NO is the f-number of the optical imaging lens.

8. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: (G12+G23)/(T1+T2)≥0.70.

9. The optical imaging lens according to claim 8 , wherein the optical imaging lens further satisfies: TTL/(T2+T3)≥5.50.

10. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: F NO /(G12+G23)≤2.50/mm, wherein F NO is the f-number of the optical imaging lens.

11. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: G23/(T2+T3)≥1.20.

12. The optical imaging lens according to claim 11 , wherein the optical imaging lens further satisfies: EFL/G23≤3.60, wherein EFL is the effective focal length of the optical imaging lens.

13. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: F NO /G23≤3.00/mm, wherein F NO is the f-number of the optical imaging lens.

14. The optical imaging lens according to claim 13 , wherein the optical imaging lens further satisfies: EFL/(T1+T2)≥4.50, wherein EFL is the effective focal length of the optical imaging lens.

15. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/(T2+T3)≥5.20, wherein EFL is the effective focal length of the optical imaging lens.

16. The optical imaging lens according to claim 15 , wherein the optical imaging lens further satisfies: (G12+G23)/T2≥3.20.

17. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/TTL≥1.00, wherein EFL is the effective focal length of the optical imaging lens.

18. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: TL/G23≤4.50, wherein TL is a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis.

19. The optical imaging lens according to claim 1 , wherein the optical imaging lens further comprises:

an aperture located on the object-side surface of the first lens element or between the first lens element and the second lens element.