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

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

• a first lens having positive refractive power;
• a second lens having negative refractive power;
• a third lens having refractive power;
• a fourth lens having refractive power;
• a fifth lens having refractive power with a convex object-side surface;
• a sixth lens having positive refractive power with a convex object-side surface and a convex image-side surface;
• and
• a seventh lens having negative refractive power,
• wherein ImgH/(TTL/ImgH)>5.0 mm,
• where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the optical imaging lens assembly;
• and
• wherein 2.3<(DT41+DT51+DT61+DT71)/(DT11+DT21+DT31)<2.8,
• where DT11 is a maximum effective radius of the object-side surface of the first lens, DT21 is a maximum effective radius of an object-side surface of the second lens, DT31 is a maximum effective radius of an object-side surface of the third lens, DT41 is a maximum effective radius of an object-side surface of the fourth lens, DT51 is a maximum effective radius of the object-side surface of the fifth lens, DT61 is a maximum effective radius of the object-side surface of the sixth lens, and DT71 is a maximum effective radius of an object-side surface of the seventh lens.