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, the first lens element to the seventh lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing 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 fifth lens element is concave;
• an optical axis region of the object-side surface of the seventh lens element is convex;
• wherein lens elements included by the optical imaging lens are only the seven lens elements described above, and wherein the optical imaging lens satisfies the relationships:
• V5+V6+V72140.000, (ImgH+D61t72)/D11t42-2.400, V4>30.000, and 3.200< (EPD+ALT)/(T3+T5+BFL), wherein V4 is an Abbe number of the fourth lens element, V5 is an Abbe number of the fifth lens element, V6 is an Abbe number of the sixth lens element, V7 is an Abbe number of the seventh lens element, ImgH is an image height of the optical imaging lens, D61t72 is a distance from the object-side surface of the sixth lens element to the image-side surface of the seventh lens element along the optical axis, D11t42 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, EPD is an entrance pupil diameter of the optical imaging lens, ALT is a sum of thicknesses of the seven lens elements from the first lens element to the seventh lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, BFL is a distance from the image-side surface of the seventh lens element to an image plane along the optical axis, and a sum of an Abbe number of the second lens element, an Abbe number of the third lens element and the Abbe number of the fifth lens element is larger than the Abbe number of the fourth lens element.