Abstract: A fingerprint ridge digital enhancement apparatus includes: a fingerprint image obtainer configured to obtain a fingerprint image; a pixel value extractor configured to divide an area with ridges and an area without ridges in the fingerprint image, and to extract a pixel value according to a color model for each area; an outlier detector configured to detect an outlier of the pixel value according to the color model for each area; a correction operator configured to calculate the average and standard deviation of pixel values according to the color model for each area from which the outlier is removed; a parameter operator configured to set a parameter that is a criterion for dividing each area, and to operate a reference value of the parameter; and a matrix operator configured to generate and operate a matrix including the pixel value according to the color model of the fingerprint image and the reference value of the parameter.

Abstract: The optical lens assembly may include a first lens having a negative refractive power, a second lens having a positive 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 negative refractive power, and a stop disposed at an object side of the first lens.

Abstract: Provided are an optical lens assembly and an electronic apparatus. The optical lens assembly 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 refractive power, and a moving lens group movable to be inserted in or removed from between the third lens and the fourth lens, wherein the first, second, third, and fourth lenses and the moving lens group are sequentially arranged from an object side to an image side. The moving lens group is moved between the third lens and the fourth lens for infrared (IR) photography.

Abstract: The optical lens assembly may include a first lens having a negative refractive power, a second lens having a positive 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 negative refractive power, and a stop disposed at an object side of the first lens.

Abstract: Provided are an optical lens assembly and an electronic apparatus. The optical lens assembly 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 refractive power, and a moving lens group movable to be inserted in or removed from between the third lens and the fourth lens, wherein the first, second, third, and fourth lenses and the moving lens group are sequentially arranged from an object side to an image side. The moving lens group is moved between the third lens and the fourth lens for infrared (IR) photography.

Abstract: Provided are an optical lens assembly and an electronic device. The optical lens assembly includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, and a last lens having a negative refractive power. The first lens, the second lens, the third lens, and the last lens may be sequentially arranged from an object side to an image side of an optical axis, the object side facing an object for image capture and the image side facing an image plane of an image sensor.

Abstract: A lens assembly according to one or more embodiments of the present disclosure and an electronic device including the lens assembly may include: a first lens having positive refractive power and disposed along an optical axis and to face an object; a second lens having negative refractive power and disposed along the optical axis and adjacent to the first lens; a third lens having positive refractive power and disposed along the optical axis and adjacent to the second lens; and a fourth lens having a negative refractive power and disposed along the optical axis and adjacent to the third lens, and having a concave face that faces an imaging surface of an image sensor. The characteristics of the lens assembly satisfy a preset requirement equation(s). The lens assembly and the electronic device as described above may be variously implemented according to embodiments.

Abstract: Provided are an optical lens assembly and an electronic device. The optical lens assembly includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, and a last lens having a negative refractive power. The first lens, the second lens, the third lens, and the last lens may be sequentially arranged from an object side to an image side of an optical axis, the object side facing an object for image capture and the image side facing an image plane of an image sensor.

Abstract: A photographing lenses and a photographing apparatus including the photographing lenses. The photographing lenses include: a first lens having a positive refractive power and a convex object-side surface; a second lens having a negative refractive power and a flat surface facing an object side or an image side; a third lens having a refractive power; a fourth lens having a negative refractive power and a meniscus shape concave toward the object side; and a fifth lens which is concave toward the image side in a region around an optical axis of the photographing lenses, wherein the first to fifth lenses are sequentially arranged in a direction from the object side to the image side.

Abstract: A lens assembly according to one or more embodiments of the present disclosure and an electronic device including the lens assembly may include: a first lens having positive refractive power and disposed along an optical axis and to face an object; a second lens having negative refractive power and disposed along the optical axis and adjacent to the first lens; a third lens having positive refractive power and disposed along the optical axis and adjacent to the second lens; and a fourth lens having a negative refractive power and disposed along the optical axis and adjacent to the third lens, and having a concave face that faces an imaging surface of an image sensor. The characteristics of the lens assembly satisfy a preset requirement equation(s). The lens assembly and the electronic device as described above may be variously implemented according to embodiments.

Abstract: A photographing lenses and a photographing apparatus including the photographing lenses. The photographing lenses include: a first lens having a positive refractive power and a convex object-side surface; a second lens having a negative refractive power and a flat surface facing an object side or an image side; a third lens having a refractive power; a fourth lens having a negative refractive power and a meniscus shape concave toward the object side; and a fifth lens which is concave toward the image side in a region around an optical axis of the photographing lenses, wherein the first to fifth lenses are sequentially arranged in a direction from the object side to the image side.

Abstract: An optical system of a zoom lens is provided. The optical system of the zoom lens includes thirteen lenses which are divided into four lens groups, wherein: the zoom lens comprises in a following order from a subject: a first lens group which has a positive refractive index; a second lens group which has a negative refractive index, and moves along an optical axis; a third lens group which has a positive refractive index; and a fourth lens group which has a positive refractive index, wherein the first lens group comprises four lenses, and an external surface of a first lens is concave in a direction of a plane of an image; the third lens group comprises two meniscus lenses which are concave toward an image plane, and is made with capability of cross-section displacement relative to an optical axis; and the fourth lens group is convex-concave glued lens.

Abstract: A dual lens optical system (OS) includes a photographing device, a first OS having a first reflection member and redirecting an optical axis of light representing an image of an object input from a first direction toward the photographing device, and a second OS having a second reflection member, redirecting an optical axis of light representing an image of an object input from a second direction toward the photographing device, and sharing at least one of optical elements of the first OS. The first and second OSs selectively redirect the image light from the first or second direction toward the photographing device. The photographing surface has a first region where the light representing the image of the object input through the first OS is formed, and a second region where light representing the image of the object input through the second OS is formed, have different sizes and are overlapped.

Abstract: A zoom lens optical system includes a first lens unit having a positive refractive index, a second lens unit which is arranged behind the first lens unit and has a negative refractive index, a third lens unit which is arranged behind the second lens unit and has a positive refractive index, and a fourth lens unit which is arranged behind the third lens unit and has a positive refractive index. An aperture is arranged within the third lens unit to prevent reduction of shutter speed due to large diameter of the zoom lens optical system.

Abstract: A lens optical system includes a first optical system and a second optical system. The lens optical system includes at least one reflection member to selectively redirect optical paths of light representing objects from first and second directions toward a photographing device. The first optical system includes, in order from an object to the photographing device along the optical axis, a first lens group including a first reflection member, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power. The second optical system shares at least one optical element with the first optical system.

Abstract: A lens optical system includes a first optical system which includes, in order from an object side to an image side along an optical axis, a first lens group having a positive refractive power and including a first reflection member to redirect an optical path of light representing an object from a first direction toward an image sensor, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. During zooming from a wide mode to a tele mode, the first lens group and the fifth lens group are fixed, the second lens group moves toward the image side, the third lens group and the fourth lens group move toward the object side, and the fourth lens group performs focusing.

Abstract: A zoom lens optical system includes a first lens unit having a positive refractive index, a second lens unit which is arranged behind the first lens unit and has a negative refractive index, a third lens unit which is arranged behind the second lens unit and has a positive refractive index, and a fourth lens unit which is arranged behind the third lens unit and has a positive refractive index. An aperture is arranged within the third lens unit to prevent reduction of shutter speed due to large diameter of the zoom lens optical system.

Abstract: A lens optical system includes a first optical system and a second optical system. The lens optical system includes at least one reflection member to selectively redirect optical paths of light representing objects from first and second directions toward a photographing device. The first optical system includes, in order from an object to the photographing device along the optical axis, a first lens group including a first reflection member, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power. The second optical system shares at least one optical element with the first optical system.

Abstract: A lens optical system includes a first optical system which includes, in order from an object side to an image side along an optical axis, a first lens group having a positive refractive power and including a first reflection member to redirect an optical path of light representing an object from a first direction toward an image sensor, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. During zooming from a wide mode to a tele mode, the first lens group and the fifth lens group are fixed, the second lens group moves toward the image side, the third lens group and the fourth lens group move toward the object side, and the fourth lens group performs focusing.

Abstract: An optical system of a zoom lens is provided. The optical system of the zoom lens includes thirteen lenses which are divided into four lens groups, wherein: the zoom lens comprises in a following order from a subject: a first lens group which has a positive refractive index; a second lens group which has a negative refractive index, and moves along an optical axis; a third lens group which has a positive refractive index; and a fourth lens group which has a positive refractive index, wherein the first lens group comprises four lenses, and an external surface of a first lens is concave in a direction of a plane of an image; the third lens group comprises two meniscus lenses which are concave toward an image plane, and is made with capability of cross-section displacement relative to an optical axis; and the fourth lens group is convex-concave glued lens.