Abstract: The disclosure discloses an optical imaging system including a first lens, a second lens, a third lens, and a plurality of subsequent lenses with refractive power and disposed sequentially along an optical axis from an object side to an image side, wherein a lens adjacent to an object side of a lens closest to an imaging plane has a positive refractive power, wherein the lens closest to the imaging plane has a negative refractive power, and an object side surface and an image side surface of the lens closest to an imaging plane are aspheric, and wherein a combined focal length f23 of the second lens and the third lens and an effective focal length fn of the lens closest to the imaging plane satisfy: ?1.5<f23/fn<5.

Abstract: A camera lens group is disclosed. The camera lens group includes, 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, a sixth lens, and a seventh lens having refractive powers. The second lens has a positive refractive power. An object-side surface of the second lens, an object-side surface of the third lens, and an object-side surface of the sixth lens are a convex surface. An image-side surface of the third lens, an image-side surface of the sixth lens, and an image-side surface of the seventh lens are a concave surface. A center thickness CT4 of the fourth lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: CT4/CT5>1.5.

Abstract: The present disclosure discloses an optical imaging system. The optical imaging system includes, sequentially from an object side to an image side, a first lens having a negative refractive power; a second lens having a refractive power; a third lens having a negative refractive power; a fourth lens having a refractive power; a fifth lens having a refractive power; a sixth lens having a refractive power; and a seventh lens having a refractive power. There is an air spacing on an optical axis between any two adjacent lenses in the first to seventh lenses. An effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD?2.10. The effective focal length f of the optical imaging system and an effective focal length f1 of the first lens satisfy: f1/f>?3.

Abstract: The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from an object side to an image side along an optical axis. The first lens, the second lens, and the sixth lens each have a positive refractive power. The third lens and the seventh lens each have a negative refractive power. The fourth lens and the fifth lens each have a refractive power. Object-side surfaces of the first lens and the second lens are both convex surfaces. An image-side surface of the third lens is a concave surface. A total effective focal length f of the optical imaging lens assembly and a radius of curvature R13 of an object-side surface of the seventh lens satisfy: |f/R13|?2.5.

Abstract: The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has a positive refractive power. An image-side surface of the second lens and an image-side surface of the seventh lens are convex surfaces. 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?1.90.

Abstract: The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly sequentially includes, from an object side to an image side along an optical axis, a first lens group and a second lens group. The first lens group includes a first lens having a positive refractive power and a second lens having a negative refractive power. The second lens group includes at least one optical element and at least one lens having a refractive power, where an object-side surface and an image-side surface of the at least one optical element are aspheric surfaces. An effective focal length f1 of the first lens and a combined focal length f12 of the first lens and the second lens satisfy: f1/f12>0.65.