Optical imaging lens including seven lenses of +−++−+−, +−−+−+− or +−+−−+− refractive powers

An optical imaging lens, from an object side to an image side in order along an optical axis comprising:

• a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the first lens element to the seventh lens element each has an object-side surface facing toward the object side to allow imaging rays to pass through as well as an image-side surface facing toward the image side to allow the imaging rays to pass through, wherein:
• the second lens element has negative refracting power;
• an optical axis region of the object-side surface of the third lens element is convex;
• an optical axis region of the object-side surface of the fourth lens element is concave;
• an optical axis region of the image-side surface of the fifth lens element is concave;
• the sixth lens element has positive refracting power, a periphery region of the object-side surface of the sixth lens element is concave, an optical axis region of the image-side surface of the sixth lens element is convex;
• an optical axis region of the object-side surface of the seventh lens element is concave;
• the lens elements having refracting power included by the optical imaging lens are only the seven lens elements described above,
• wherein the optical imaging lens satisfies the relationships:
• u3+u3+u6≤110.00 and (T1+T7)/(G12+T2+G45)≥2.500, wherein u2 is an Abbe number of the second lens element, u3 is an Abbe number of the third lens element, u6 is an Abbe number of the sixth lens element, 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, T7 is a thickness of the seventh lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis.

An optical imaging lens, from an object side to an image side in order along an optical axis comprising:

• a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the first lens element to the seventh lens element each has an object-side surface facing toward the object side to allow imaging rays to pass through as well as an image-side surface facing toward the image side to allow the imaging rays to pass through, wherein:
• the second lens element has negative refracting power;
• an optical axis region of the object-side surface of the third lens element is convex;
• an optical axis region of the object-side surface of the fourth lens element is concave;
• an optical axis region of the image-side surface of the fifth lens element is concave;
• the sixth lens element has positive refracting power, a periphery region of the object-side surface of the sixth lens element is concave;
• an optical axis region of the object-side surface of the seventh lens element is concave, and an optical axis region of the image-side surface of the seventh lens element is concave;
• the lens elements having refracting power included by the optical imaging lens are only the seven lens elements described above,
• wherein the optical imaging lens satisfies the relationships:
• u2+u3+u6≤110.000 and (T1+T7)/(G12+T2+G45)≥2.500, wherein u2 is an Abbe number of the second lens element, u3 is an Abbe number of the third lens element, u6 is an Abbe number of the sixth lens element, 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, T7 is a thickness of the seventh lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis.