Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis from an object side toward an imaging plane, wherein the seventh lens includes an optical portion configured to refract light, and a rib surrounding the optical portion; the rib includes a surface-treated area disposed in a first portion of an object-side surface of the rib and a first portion of an image-side surface of the rib, a first non-treated area disposed in a second portion of the object-side surface of the rib, and a second non-treated area disposed in a second portion of the image-side surface of the rib; and the first non-treated area and the second non-treated area overlap each other when viewed in a direction of the optical axis.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the optical imaging system satisfies 1<|f123457?f|/f, where f123457 is a composite focal length of the first to seventh lenses calculated with an index of refraction of the sixth lens set to 1.0, f is an overall focal length of the optical imaging system, and f123457 and f are expressed in a same unit of measurement.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side optical imaging system, and a refractive index of at least one of the lenses is 1.67 or greater.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged along an optical axis from an object side toward an image side. The fifth lens has a positive refractive power, a focal length of the fifth lens is smaller than an overall focal length of the optical imaging system, and ?0.38?R10/f??0.32, where R10 is a radius of curvature of an image-side surface of the fifth lens and f is the overall focal length of the optical imaging system.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged from an object side to an imaging plane. An angle of view of the optical system is 82 degrees or more. A constant indicating brightness of the optical system, F-number, is less than 1.8.

Abstract: An optical imaging system includes a first lens group including a first lens and a second lens, a second lens group including a third lens, a fourth lens, and a fifth lens, and a third lens group including a sixth lens and a seventh lens. The first to seventh lenses are arranged in order from an object side, at least one of the first lens group to the third lens group is moved on an optical axis to change a distance between the first lens group to the third lens group, and the following conditional expression is satisfied: 0.2<BFL/(2*IMG HT)<2.0 where BFL is a distance on the optical axis from an image-side surface of the seventh lens to an imaging surface of an image sensor, and IMG HT is half a diagonal length of the imaging surface of the image sensor.

Abstract: An optical imaging system includes a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a negative refractive power. The first to sixth lenses are sequentially disposed from an object side to an imaging plane. An Abbe number of the second lens is 21 or less.

Abstract: An optical imaging system includes a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a negative refractive power. The first to sixth lenses are sequentially disposed from an object side to an imaging plane. An Abbe number of the second lens is 21 or less.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed from an object side. The third lens and the sixth lens have positive refractive power, and an f-number (F No.) of the optical imaging system is 1.7 or less.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side optical imaging system, and a refractive index of at least one of the lenses is 1.67 or greater.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged along an optical axis from an object side toward an image side. The fifth lens has a positive refractive power, a focal length of the fifth lens is smaller than an overall focal length of the optical imaging system, and ?0.38?R10/f??0.32, where R10 is a radius of curvature of an image-side surface of the fifth lens and f is the overall focal length of the optical imaging system.

Abstract: An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed from an object side. The system satisfies TTL/f<1.0 and D23/D34<1.2, where TTL is a distance from an object-side surface of the first lens to an imaging plane, f is a focal length of the imaging lens system, D23 is a distance from an image-side surface of the second lens to an object-side surface of the third lens, and D34 is a distance from an image-side surface of the third lens to an object-side surface of the fourth lens.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens having negative refractive power, a fourth lens, a fifth lens, and a sixth lens, disposed in order from an object side. The optical imaging system has a field of view of 120 degrees or greater, and a distortion aberration at a highest height of an imaging plane is +30% or greater or ?30% or lower.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged from an object side to an imaging plane. An angle of view of the optical system is 82 degrees or more. A constant indicating brightness of the optical system, F-number, is less than 1.8.

Abstract: A lens module includes first to seventh lenses each having refractive power and sequentially disposed in numerical order from the first lens to the seventh lens starting from an object side of the lens module, wherein each of the first and second lenses has a meniscus shape and an image-side surface that is convex, and the seventh lens has one or more inflection points on an image-side surface thereof.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed from an object side. The third lens and the sixth lens have positive refractive power, and an f-number (F No.) of the optical imaging system is 1.7 or less.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed from an object side to an imaging plane. The second lens has a concave image-side surface, the third lens comprises a positive refractive power, a radius of curvature of an object-side surface of the fifth lens is greater than a radius of curvature of an image-side surface of the fifth lens and a radius of curvature of an object-side surface of the sixth lens, and TTL/2lmgHT<0.695 in which TTL represents a distance from an object-side surface of a lens closest to the object side among the plurality of lenses to an imaging plane and 2lmgHT represents a diagonal length of an imaging plane.

Abstract: An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed from an object side. The system satisfies TTL/f<1.0 and D23/D34<1.2, where TTL is a distance from an object-side surface of the first lens to an imaging plane, f is a focal length of the imaging lens system, D23 is a distance from an image-side surface of the second lens to an object-side surface of the third lens, and D34 is a distance from an image-side surface of the third lens to an object-side surface of the fourth lens.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens having negative refractive power, a fourth lens, a fifth lens, and a sixth lens, disposed in order from an object side. The optical imaging system has a field of view of 120 degrees or greater, and a distortion aberration at a highest height of an imaging plane is +30% or greater or ?30% or lower.

Abstract: An optical imaging system includes a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power and a concave image-side surface; a fifth lens having a refractive power; a sixth lens having a refractive power; a seventh lens having a refractive power; and an eighth lens having a refractive power and a concave object-side surface, wherein the first to eighth lenses are sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system.