Abstract: The present disclosure discloses an optical imaging system, along an optical axis from an object side to an image side, sequentially includes: a first lens having negative refractive power; a second lens having positive refractive power, and an object-side surface of the second lens being a convex surface; a third lens having refractive power; and a fourth lens having refractive power, and an object-side surface of the fourth lens being a concave surface. A total effective focal length f of the optical imaging system and half of a maximum field-of-view Semi-FOV of the optical imaging system satisfy: f×tan(Semi-FOV)?4.0 mm; and the total effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD<2.35.

Abstract: The present application relates to the field of optical lenses and discloses a camera optical lens, including, in order from an objective 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 following relationship expressions are satisfied: 1.70?n1?2.20; 0.80?f5/f?1.40; 0.70?d3/d5?2.80. The present application provides a wide-angle optical camera lens with a large aperture having excellent optical performance.

Abstract: The present disclosure discloses an optical imaging system, along an optical axis from an object side to an image side, sequentially includes: a first lens having negative refractive power; a second lens having positive refractive power, and an object-side surface of the second lens being a convex surface; a third lens having refractive power; and a fourth lens having refractive power, and an object-side surface of the fourth lens being a concave surface. A total effective focal length f of the optical imaging system and half of a maximum field-of-view Semi-FOV of the optical imaging system satisfy: f×tan(Semi-FOV)?4.0 mm; and the total effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD<2.35.

Abstract: An optical imaging lens assembly is provided, which includes, sequentially from an object side to an image side along an optical axis, a first lens having a refractive power with a convex object-side surface; a second lens having a refractive power with a convex object-side surface; a third lens having a positive refractive power; a fourth lens having a negative refractive power with a concave object-side surface; a fifth lens having a refractive power; and a sixth lens having a refractive power. A half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfies: Semi-FOV?70°. A half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens assembly satisfies: ImgH?7.8 mm.