Imaging lens assembly

An imaging lens assembly consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially from an object side to an image side of the imaging lens assembly,

• wherein the fourth lens has a positive refractive power, a concave object-side surface and a convex image-side surface,
• the sixth lens has a convex object-side surface;
• wherein at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, or the sixth lens is a glass aspheric lens, and an influence ratio dng/dt of a unit temperature to a unit refractive index of the glass aspheric lens and an influence ratio dni/dt of a unit temperature to a unit refractive index of a lens closest to the image side satisfy:
• |dng/dt|/|dni/dt|<0.1,
• wherein an effective focal length f of the imaging lens assembly and an entrance pupil diameter EPD of the imaging lens assembly satisfy:
• 1.5<f/EPD≤1.69,
• wherein an abbe number Vg of the glass aspheric lens and an abbe number Vi of the lens closest to the image side satisfy:
• 0.35<Vg/Vi<1.5;
• and
• wherein the radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R4 of the image-side surface of the second lens satisfy:
• 0<R1/R4≤0.84.

An imaging lens assembly, consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially from an object side to an image side of the imaging lens assembly,

• wherein the first lens has a positive refractive power and a convex object-side surface;
• the second lens has a negative refractive power and a concave image-side surface;
• the fourth lens has a positive refractive power, a concave object-side surface and a convex image-side surface;
• the sixth lens has a convex object-side surface;
• wherein at least one of the first lens, the second lens, or at least one of the third lens, the fourth lens, the fifth lens, or the sixth lens is a glass aspheric lens, and
• an effective focal length f of the imaging lens assembly and a radius of curvature R1 of the object-side surface of the first lens satisfy:
• 2<f/R1<4,
• wherein an effective focal length f of the imaging lens assembly and an entrance pupil diameter EPD of the imaging lens assembly satisfy:
• 1.5<f/EPD≤1.69,
• wherein an abbe number Vg of the glass aspheric lens and an abbe number Vi of a lens closest to the image side satisfy:
• 0.35<Vg/Vi<1.5;
• and
• wherein the radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R4 of the image-side surface of the second lens satisfy:
• 0<R1/R4≤0.84.