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, a fourth lens, a fifth lens, and a sixth 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 refractive power, an object-side surface of the second lens is a convex surface, and an image-side surface of the second lens is a concave surface;
• each of the third lens and the fourth lens has a refractive power;
• the fifth lens has a positive refractive power, and an image-side surface of the fifth lens is a convex surface;
• the sixth lens has a negative refractive power, and an object-side surface and an image-side surface of the sixth lens are concave surfaces;
• and
• a total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy:
• f/EPD≤1.6,
• wherein a center thickness CT2 of the second lens on the optical axis and a spacing distance T12 between the first lens and the second lens on the optical axis satisfy:
• 4.30≤CT2/T12≤5.69, and
• wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy:
• 3<f1/CT1<4.