Abstract: An optical image system includes, in order from an object side to an image side, the first lens element with positive refractive power having a convex object-side surface; the second lens element with refractive power; the third lens element with positive refractive power having at least one surface being aspheric; the fourth lens element with refractive power having a concave object-side surface and a convex image-side surface, wherein at least one surface thereof element is aspheric; the fifth lens element with positive refractive power having a convex image-side surface; and the sixth lens element with negative refractive power made of plastic material and having a concave image-side surface, wherein at least one surface thereof is aspheric, and the image-side surface thereof changes from concave at a paraxial region to convex at a peripheral region.

Abstract: This invention provides a photographing optical lens assembly, from an object side to an image side in order, comprising a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave image-side surface, a third lens element with positive refractive power, a fourth lens element with negative refractive power having a concave image-side surface, both the two surfaces of the fourth lens thereof being aspheric. And an aperture stop is positioned between the first element and the second lens element. There are four lens elements with refractive power in the lens assembly.

Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with positive refractive power has a convex image-side surface, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with negative refractive power has a concave image-side surface, wherein at least one surface of the sixth lens element is aspheric, and the sixth lens element has at least one inflection point on the image-side surface thereof.

Abstract: This invention provides an optical imaging lens system in order from an object side to an image side comprising five non-cemented lens elements with refractive power: a first lens element with positive refractive power having a convex object-side surface; a second lens element with positive refractive power; a third lens element with negative refractive power, and both surfaces being aspheric; a fourth lens element having a convex image-side surface, and both surfaces being aspheric; and a plastic fifth lens element having a concave image-side surface, both surfaces being aspheric, and at least one inflection point is formed on at least one of the surfaces thereof. By such arrangement, the refractive power of the optical imaging lens system can be effectively distributed with improved light converging power so that the total track length can be shortened effectively, and the aberration of system can be corrected to facilitate high image quality.

Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.

Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.

Abstract: An optical image lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The second lens element with refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has two surfaces being aspheric. The fourth lens element with positive refractive power has a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points on at least one of the surfaces thereof.

Abstract: An optical image system includes, in order from an object side to an image side, the first lens element with positive refractive power having a convex object-side surface; the second lens element with refractive power; the third lens element with positive refractive power having at least one surface being aspheric; the fourth lens element with refractive power having a concave object-side surface and a convex image-side surface, wherein at least one surface thereof element is aspheric; the fifth lens element with positive refractive power having a convex image-side surface; and the sixth lens element with negative refractive power made of plastic material and having a concave image-side surface, wherein at least one surface thereof is aspheric, and the image-side surface thereof changes from concave at a paraxial region to convex at a peripheral region.

Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.

Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with negative refractive power has a concave image-side surface. The fourth lens element with refractive power has a concave object-side surface and a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points formed on at least one of surface thereof.

Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.

Abstract: An optical lens system for taking image comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave image-side surface and an object-side surface cemented to an image-side surface of the first lens element; a third lens element with negative refractive power; a fourth lens element with positive refractive power having a concave image-side surface and at least one inflection point; and an aperture stop located between an object to be photographed and the third lens element. In the optical lens system for taking image, the number of the lens elements with refractive power being limited to four. A focal length of the optical lens system for taking image is f, a focal length of the first lens element is f1, they satisfy the relation: 0.8<f/f1<2.1.

Abstract: This invention provides an optical image capturing lens system comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element; a third lens element; a fourth lens element; and a fifth lens element with negative refractive power, at least one of the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof; wherein the system at least has one front stop and one rear stop; which are positioned between an imaged object and the third lens element as well as between the third lens element and the fifth lens element, respectively. By such arrangement, photosensitivity and total track length of the system can be reduced, and the aberration and astigmatism of the system can be effectively corrected. Moreover, the focusing performance thereof can be improved.

Abstract: A photographing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has negative refractive power. The third lens element with positive refractive power is made of plastic material and has a convex object-side surface and a convex image-side surface. The fourth lens element with negative refractive power is made of plastic material and has a concave object-side surface and a convex image-side surface. The fifth lens element with refractive power is made of plastic material and has a concave image-side surface, wherein the fifth lens element has at least one inflection point. The object-side surfaces and the image-side surfaces of the third through fifth lens elements are aspheric.

Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with negative refractive power has a concave image-side surface. The fourth lens element with refractive power has a concave object-side surface and a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points formed on at least one of surface thereof.

Abstract: An optical lens system for taking image comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave image-side surface and an object-side surface cemented to an image-side surface of the first lens element; a third lens element with negative refractive power; a fourth lens element with positive refractive power having a concave image-side surface and at least one inflection point; and an aperture stop located between an object to be photographed and the third lens element. In the optical lens system for taking image, the number of the lens elements with refractive power being limited to four. A focal length of the optical lens system for taking image is f, a focal length of the first lens element is f1, they satisfy the relation: 0.8<f/f1<2.1.

Abstract: An image pick-up optical system, in order from an object side to an image side, along an optical axis comprising: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the second lens element with positive refractive power, a bi-convex third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface, a plastic fifth lens element with positive refractive power having a convex object-side surface and at least one aspherical optical surface. Additionally, the image pick-up optical system satisfies conditions related to shorten the total length and to enhance the ability of wider field of view for use in compact cameras and mobile phones.

Abstract: This invention provides an optical image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element, the object-side and image-side surfaces thereof being aspheric; and a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. The present lens assembly is further provided with a stop and an electronic sensor for image formation of an object. The stop is disposed between the object and the second lens element, and the electronic sensor is disposed at an image plane.

Abstract: An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has a concave object-side surface, wherein the surfaces of the third lens element are aspheric. The fourth lens element has positive refractive power, wherein two surfaces of the fourth lens element are aspheric. The fifth lens element has refractive power, wherein two surfaces of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point formed on at least one surface thereof.

Abstract: A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface, and a second lens element with positive refractive power having a concave object-side surface and a convex image-side surface. At least one surface of the first lens element is aspheric and two surfaces of the second lens element are aspheric. The photographing optical lens assembly can also include a stop and an image plane. By adjusting the thicknesses of the first lens element and the second lens element as well as the allocation of the stop in the photographing optical lens assembly can effectively reduce the size as well as the sensitivity of the photographing optical lens assembly while gaining superior resolution.