Optical imaging lens assembly

An optical imaging lens assembly comprising sequentially, from an object side to an image side along an optical axis:

• a first lens, a second lens, a third lens, and a fourth lens, wherein,
• the first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface;
• the second lens has a positive refractive power or a negative refractive power, an object-side surface of the second lens is a concave surface, and an image-side surface of the second lens is a convex surface;
• the third lens has a positive refractive power, an object-side surface of the third lens is a concave surface, and an image-side surface of the third lens is a convex surface;
• the fourth lens has a positive refractive power or a negative refractive power;
• and
• a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy:
• 0.4<CT2/CT3<0.7,
• wherein a distance SAG31 from an intersection of the object-side surface of the third lens and the optical axis to a vertex of a maximum effective half aperture of the object-side surface of the third lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy:
• −1.3<SAG31/CT3<−0.7.