Abstract: An optical imaging system is provided. The optical imaging system includes a first lens, a second lens, a third lens, and a fourth lens arranged in order from an object side toward an image plane, wherein the first lens may be formed of glass, and wherein a conditional expression 70<v1 and 0.8?OAL/f?0.9 may be satisfied, where v1 is an Abbe number of the first lens, OAL is a distance from an object-side surface of the first lens to the image plane, and f is a total 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 disposed on an optical axis from an object side toward an image side. A distance from an object-side surface of the first lens to an imaging plane of an image sensor is TTL, an overall focal length of an optical system including the first to sixth lenses is F, and TTL/F?0.83. An optical axis distance between the second lens and the third lens is D23, an optical axis distance between the third lens and the fourth lens is D34, and 2.2<D23/D34<5.4.

Abstract: Disclosed are lens assembly including a lens having a length in a first direction, perpendicular to an optical axis, shorter than a length in a second direction, perpendicular to both the optical axis and the first direction, on a plane perpendicular to the optical axis, and a lens barrel accommodating the lens, and having an opening in a side of the lens barrel, wherein a side of the lens in the first direction is exposed through the opening.

Abstract: A spacer includes: an opening through which light passes; an inner side surface forming the opening; and a protruding portion including a plurality of protrusions protruding from the inner side surface. Lengths of the plurality of protrusions vary in a circumferential direction of the protruding portion.

Abstract: A lens includes an optical portion and a flange portion. The optical portion has a greater length along a first axis direction than a second axis direction, and the first axis direction and the second axis direction are perpendicular to an optical axis and perpendicular to each other. A flange portion extending along the first axis direction includes a first inclined portion connected to a first surface of the optical portion and a second inclined portion connected to a second surface of the optical portion. The second inclined portion protrudes in an optical axis direction, relative to the second surface of the optical portion, in an area in which the second inclined portion is connected to the second surface of the optical portion. A light absorption layer is disposed in the area in which the second inclined portion is connected to the second surface of the optical portion.

Abstract: An optical imaging system includes a first lens having positive refractive power, a second lens, a third lens, and a fourth lens, arranged sequentially from an object side along an optical axis. The first lens through the fourth lens are spaced apart from each other along the optical axis in a paraxial region. A total focal length f of a lens unit including the first lens through the fourth lens and half (IMG HT) of a diagonal length of an imaging surface of an image sensor satisfy f/IMG HT>4.9. An effective aperture radius of an object-side surface of the first lens and an effective aperture radius of an object-side surface of the second lens are both greater than effective aperture radii of an object-side surface and an image-side surface of each of the lenses other than the first lens and the second lens.

Abstract: An optical imaging system 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 0.5<L1234TRavg/L7TR<0.9, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

Abstract: An optical imaging system 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 0.5<L1234TRavg/L7TR<0.9, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

Abstract: A spacer includes: an opening through which light passes; an inner side surface forming the opening; and a protruding portion including a plurality of protrusions protruding from the inner side surface. Lengths of the plurality of protrusions vary in a circumferential direction of the protruding portion.

Abstract: An optical imaging system includes a first lens having positive refractive power, a second lens, a third lens, and a fourth lens, arranged sequentially from an object side along an optical axis. The first lens through the fourth lens are spaced apart from each other along the optical axis in a paraxial region. A total focal length f of a lens unit including the first lens through the fourth lens and half (IMG HT) of a diagonal length of an imaging surface of an image sensor satisfy f/IMG HT>4.9. An effective aperture radius of an object-side surface of the first lens and an effective aperture radius of an object-side surface of the second lens are both greater than effective aperture radii of an object-side surface and an image-side surface of each of the lenses other than the first lens and the second lens.

Abstract: A spacer includes an outer circumferential surface in contact with a lens barrel, and an inner circumferential surface forming a hole for controlling an amount of light, a first length of the hole in a first direction, intersecting an optical axis, and a second length of the hole in a second direction, intersecting the optical axis, are different from each other, and a first distance from the outer circumferential surface to the inner circumferential surface, extended in the first direction, is less than a second distance from the outer circumferential surface to the inner circumferential surface, extended in the second direction.

Abstract: A camera module includes a first lens module having a first lens barrel accommodating a first lens group, and a second lens module spaced apart from the first lens module in an optical axis direction, configured to be moveable in the optical axis direction, and having a second lens barrel accommodating a second lens group, the first lens barrel includes a first through-hole on one side and a first opening on the other side, the second lens barrel includes a second opening opposing the first opening on one side and a second through-hole on the other side, a diameter of the first opening is greater than a diameter of the first through-hole, and a diameter of the second opening is greater than a diameter of the second through-hole, and a light shielding member is disposed at one or more of the first opening and the second opening.

Abstract: An optical imaging system 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 0.5<L1234TRavg/L7TR<0.9, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

Abstract: An optical imaging system 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 0.5<L1234TRavg/L7TR<0.9, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

Abstract: An optical imaging system includes: a first lens having a concave image-side surface; a second lens having refractive power; a third lens having a concave image-side surface; a fourth lens having a concave object-side surface or a convex image-side surface; a fifth lens having refractive power; a sixth lens having a concave image-side surface; and a seventh lens having negative refractive power. The first to seventh lenses are sequentially disposed from an object side and 1.62<(N2+N5+N6)/3, where N2 is a refractive index of the second lens, N5 is a refractive index of the fifth lens, and N6 is a refractive index of the sixth lens.

Abstract: A lens includes an optical portion configured to refract light, and a flange portion extending from the optical portion, wherein a first region having first surface roughness, a second region having second surface roughness, and a third region having third surface roughness are sequentially disposed from the optical portion toward the flange portion, on at least one of an object-side surface and an image-side surface of the flange portion, the first surface roughness and the third surface roughness are greater than the second surface roughness, and a light blocking portion is disposed in the second region.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, and a fourth lens sequentially disposed from an object side toward an image side on an optical axis, and a reflecting member disposed closer to the object side, as compared to the first lens, and having a reflecting surface configured to change a path of light to be incident to the first to fourth lenses. The first to fourth lenses are disposed to be spaced apart from each other by a preset distance along the optical axis, and 1.3<TTL/BFL<3.5, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and BFL is a distance from an image-side surface of the fourth lens to the imaging plane of the image sensor.

Abstract: An optical imaging system includes: a first lens having a concave image-side surface; a second lens having refractive power; a third lens having a concave image-side surface; a fourth lens having a concave object-side surface or a convex image-side surface; a fifth lens having refractive power; a sixth lens having a concave image-side surface; and a seventh lens having negative refractive power. The first to seventh lenses are sequentially disposed from an object side and 1.62<(N2+N5+N6)/3, where N2 is a refractive index of the second lens, N5 is a refractive index of the fifth lens, and N6 is a refractive index of the sixth lens.

Abstract: A lens includes an optical portion and a flange portion. The optical portion has a greater length along a first axis direction than a second axis direction, and the first axis direction and the second axis direction are perpendicular to an optical axis and perpendicular to each other. A flange portion extending along the first axis direction includes a first inclined portion connected to a first surface of the optical portion and a second inclined portion connected to a second surface of the optical portion. The second inclined portion protrudes in an optical axis direction, relative to the second surface of the optical portion, in an area in which the second inclined portion is connected to the second surface of the optical portion. A light absorption layer is disposed in the area in which the second inclined portion is connected to the second surface of the optical portion.

Abstract: A camera module includes a first lens module having a first lens barrel accommodating a first lens group, and a second lens module spaced apart from the first lens module in an optical axis direction, configured to be moveable in the optical axis direction, and having a second lens barrel accommodating a second lens group, the first lens barrel includes a first through-hole on one side and a first opening on the other side, the second lens barrel includes a second opening opposing the first opening on one side and a second through-hole on the other side, a diameter of the first opening is greater than a diameter of the first through-hole, and a diameter of the second opening is greater than a diameter of the second through-hole, and a light shielding member is disposed at one or more of the first opening and the second opening.