Abstract: Provided is an infrared photographic lens optical system. The infrared photographic lens optical system includes an incident light restricting unit restricting incidence of a light passed through a given lens, an image sensor sensing an image of an object, a lens system including first to fourth lenses arranged sequentially from the object to the image sensor between the object and the image sensor, and a visible light blocking unit arranged between the first lens and the image sensor.

Abstract: A wide angle lens system, from an object side to an image plane side, includes: a first lens having a positive refractive power; a second lens having a positive refractive power and an exit surface that is convex toward the image plane side; a third lens having a negative refractive power and an exit surface that is concave toward the image plane side; a fourth lens having a positive refractive power and an exit surface that is convex toward the image plane side; a fifth lens having a negative refractive power and an exit surface that is concave toward the image plane side; and a sixth lens having a positive refractive power. The wide angle lens system satisfies the following formulas: 75<FOV<85 2.0<Fno<2.3 where FOV is a field of view of the wide angle lens system in degrees (°) and Fno is an F-number of the wide angle lens system.

Abstract: Provided is a photographing lens optical system. The photographing lens optical system includes: an aperture stop; an image sensor configured to sense an image of an object; and a plurality of lenses arranged between the object and the image sensor, wherein each of two successive lenses from among the plurality of lenses respectively include a plurality of inflection points. The plurality of lenses may include six lenses including the two successive lenses. The six lenses are plastic lenses, and some of the six lenses include a material different from materials included in other lenses among the six lenses.

Abstract: An optical lens assembly and an electronic apparatus having the optical lens assembly are disclosed. The optical lens assembly includes, in order from an object side to an image side, a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power and having at least one inflection point on at least one of an object side surface and an image side surface; and a sixth lens having a negative refractive power.

Abstract: A wide angle lens system, from an object side to an image plane side, includes: a first lens having a positive refractive power; a second lens having a positive refractive power and an exit surface that is convex toward the image plane side; a third lens having a negative refractive power and an exit surface that is concave toward the image plane side; a fourth lens having a positive refractive power and an exit surface that is convex toward the image plane side; a fifth lens having a negative refractive power and an exit surface that is concave toward the image plane side; and a sixth lens having a positive refractive power. The wide angle lens system satisfies the following formulas: 75<FOV<85 2.0<Fno<2.3 where FOV is a field of view of the wide angle lens system in degrees (°) and Fno is an F-number of the wide angle lens system.

Abstract: Provided are photographic lens optical systems. A photographic lens optical system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that are located between an object and an image sensor on which an image of the object is formed and are sequentially arranged from the object. The first lens may have a positive (+) refractive power. The second lens may have a negative (?) refractive power and may have an exit surface concave from the image sensor. The third lens may have a positive (+) refractive power and may have an exit surface convex toward the image sensor. The fourth lens may have a negative (?) refractive power and may have a meniscus shape convex toward the object. The fifth lens may have a positive (+) refractive power and may have an exit surface convex toward the image sensor.

Abstract: Provided are lens optical systems. A lens optical system includes first to third lenses sequentially arranged in a direction from an object to an image sensor. The first lens may have a positive refractive power and an entrance surface convex toward the object. The second lens may have a negative refractive power and a meniscus shape convex toward the image sensor. The third lens may have a positive refractive power, and at least one of entrance and exit surfaces of the third lens may have an inflection point in a direction from a center region toward an edge thereof. The outer diameter D3 (in millimeters) of the exit surface of the third lens and the diagonal length ImgHMAX of a maximum pixel region of the image sensor may satisfy 2.6<D3<3.0 and 1.3<ImgHMAX/D3<1.5. The system may have a field of view (FOV) of about 75° to about 85°.

Abstract: Provided are lens optical systems. A lens optical system includes first to third lenses sequentially arranged in a direction from an object to an image sensor. The first lens may have a positive refractive power and an entrance surface convex toward the object. The second lens may have a negative refractive power and a meniscus shape convex toward the image sensor. The third lens may have a positive refractive power, and at least one of entrance and exit surfaces of the third lens may have an inflection point in a direction from a center region toward an edge thereof. The outer diameter D3 (in millimeters) of the exit surface of the third lens and the diagonal length ImgHMAX of a maximum pixel region of the image sensor may satisfy 2.6<D3<3.0 and 1.3<ImgHMAX/D3<1.5. The system may have a field of view (FOV) of about 75° to about 85°.

Abstract: Disclosed is a photographic optical lens system. The disclosed optical lens system includes a lens system including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens which are sequentially disposed on an optic axis between an object and an image plane and each have an incident surface facing the object and an output surface facing the image plane, wherein the first and sixth lenses have positive (+) power, and the second to fifth lenses have negative (?) power.

Abstract: A photographic lens optical system which includes five lenses sequentially arranged in a direction from an object to an image sensor is disclosed. A first lens may have a positive refractive power and an entrance surface convex toward the object. A second lens may have a negative refractive power and an exit surface concave toward the image sensor. A third lens may have a positive refractive power and a meniscus shape convex toward the image sensor. A fourth lens may have a negative refractive power and a meniscus shape convex toward the image sensor. A fifth lens may have a negative refractive power, and at least one of an entrance surface and an exit surface of the fifth lens may be aspheric. The system may satisfy the formula: | tan ?|/f<1.0, ? denoting an angle of view of the system, and f denoting a focal length of the system.

Abstract: A photographic lens optical system includes: a first lens having a positive refractive power and a meniscus shape convex toward an object side; a second lens having a negative refractive power and a meniscus shape convex toward the object side; a doublet lens having a positive refractive power and formed by combining a third lens and a fourth lens; a fifth lens having a positive refractive power and a double convex shape; and a sixth lens having a positive refractive power and a double convex shape. The first to sixth lenses are sequentially arranged in a direction from the object side to an image side, and the photographic lens optical system satisfies the following condition: 1.5<Nd2<1.7 where Nd2 denotes a refractive index of the second lens.

Abstract: A photographic lens optical system. The photographic lens optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that are sequentially arranged in a direction from an object toward an image sensor. The first lens has a negative (?) power, and the emission surface thereof may be convex toward the object. The second lens may have a positive (+) power, the third and fourth lenses have positive (+) powers, and the fifth lens has a negative (?) power. Furthermore, the sixth lens is an aspherical lens having a positive (+) power.

Abstract: An optical lens system includes sequentially from an object side to an image plane side: a first lens having a negative refractive power and an object side surface that is convex toward the object side; a second lens having a negative refractive power and an object side surface that is convex toward the object side; a third lens having a positive refractive power and an image side surface that is convex toward the image side; a fourth lens having a negative refractive power and an object side surface that is concave toward the object side; and a fifth lens having a positive refractive power and an image side surface that is convex toward the image side.

Abstract: An optical lens system includes sequentially from an object side to an image plane side: a first lens having a negative refractive power and an object side surface that is convex; a second lens having a positive refractive power and an image side surface that is convex toward the image side; a third lens having a positive refractive power and an image side surface that is convex toward the image side; a fourth lens having a positive refractive power and a biconvex shape; and a fifth lens having a negative refractive power and an object side surface that is concave toward the object side.

Abstract: A photographic lens optical system includes: a first lens having a negative refractive power and a meniscus shape convex toward an object side; a second lens having a positive refractive power and a shape convex toward an image side; a third lens having a positive refractive power and a double convex shape; and a fourth lens having a negative refractive power and a shape convex toward the image side, wherein the first to fourth lenses are sequentially arranged in a direction from the object side to the image side, and the photographic lens optical system satisfies the following condition: 0.15<|(tan ?)/f|<0.25 where ? and f denote an angle of view and a focal length of the photographic lens optical system, respectively.

Abstract: An optical lens system includes sequentially from an object side to an image plane side: a first lens having a negative refractive power and an object side surface that is convex toward the object side; a second lens having a negative refractive power and an object side surface that is convex toward the object side; a third lens having a positive refractive power and an image side surface that is convex toward the image side; a fourth lens having a negative refractive power and an object side surface that is concave toward the object side; and a fifth lens having a positive refractive power and an image side surface that is convex toward the image side.

Abstract: A photographic lens optical system which includes five lenses sequentially arranged in a direction from an object to an image sensor is disclosed. A first lens may have a positive refractive power and an entrance surface convex toward the object. A second lens may have a negative refractive power and an exit surface concave toward the image sensor. A third lens may have a positive refractive power and a meniscus shape convex toward the image sensor. A fourth lens may have a negative refractive power and a meniscus shape convex toward the image sensor. A fifth lens may have a negative refractive power, and at least one of an entrance surface and an exit surface of the fifth lens may be aspheric. The system may satisfy the formula: |tan ?|/f<1.0, ? denoting an angle of view of the system, and f denoting a focal length of the system.

Abstract: An optical lens system includes sequentially from an object side to an image plane side: a first lens having a negative refractive power and an object side surface that is convex; a second lens having a positive refractive power and an image side surface that is convex toward the image side; a third lens having a positive refractive power and an image side surface that is convex toward the image side; a fourth lens having a positive refractive power and a biconvex shape; and a fifth lens having a negative refractive power and an object side surface that is concave toward the object side.

Abstract: A photographic lens optical system includes: a first lens having a positive refractive power and a meniscus shape convex toward an object side; a second lens having a negative refractive power and a meniscus shape convex toward the object side; a doublet lens having a positive refractive power and formed by combining a third lens and a fourth lense; a fifth lens having a positive refractive power and a double convex shape; and a sixth lens having a positive refractive power and a double convex shape. The first to sixth lenses are sequentially arranged in a direction from the object side to an image side, and the photographic lens optical system satisfies the following condition: 1.5<Nd2<1.7 where Nd2 denotes a refractive index of the second lens.

Abstract: A photographic lens optical system. The photographic lens optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that are sequentially arranged in a direction from an object toward an image sensor. The first lens has a negative (?) power, and the emission surface thereof may be convex toward the object. The second lens may have a positive (+) power, the third and fourth lenses have positive (+) powers, and the fifth lens has a negative (?) power. Furthermore, the sixth lens is an aspherical lens having a positive (+) power.