Abstract: An optical telephoto imaging lens includes an aperture stop and a lens group, the lens group includes, in order from an object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a refractive power; a fourth lens element with a negative refractive power; a fifth lens element with a positive refractive power. The first, second, third, fourth and fifth lens elements each have a focal length: f1, f2, f3, f4 and f5, the object-side and the image-side surfaces of the second lens element each have a radius of curvature R3, R4, and they satisfy the relations: |fn|>|f4|>|f2|>|f1|, wherein n=3 and 5; 0<(R3+R4)/(R3?R4)<0.5.

Abstract: An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a positive refractive power; a fifth lens element with a negative refractive power; wherein focal lengths of the optical imaging lens, first, second, third, fourth and fifth lens elements are f, f1, f2, f3, f4, f5, respectively, radii of curvature of object-side and image-side surfaces of the fifth lens element are R9, R10, respectively, and the following conditions are satisfied: |f5|<|fn|, n=1, 2, 3, 4; ?0.45<f5/f<?0.2; 0<(R9+R10)/(R9?R10)<0.5.

Abstract: A wide angle optical lens system includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a negative refractive power; a second lens element with a positive refractive power; a third lens element with a negative refractive power; a fourth lens element with a refractive power; a fifth lens element with a positive refractive power; a sixth lens element with a negative refractive power, wherein a focal length of the wide angle optical lens system is f, a focal length of the fifth lens element is f5, a radius of curvature of an object-side surface of the third lens element is R5, a radius of curvature of an image-side surface of the third lens element is R6, the following conditions are satisfied: 1.0<f/f5<3.8; ?3.5<(R6+R5)/(R6?R5)<0.6.

Abstract: An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a negative refractive power; a fifth lens element with a refractive power; wherein a focal length of the optical imaging lens is f, focal lengths of the first, second, third, fourth and fifth lens elements are f1, f2, f3, f4, f5, respectively, a radius of curvature of an image-side surface of the first lens element is R2, satisfying: |f3|?|fn|, wherein n=1, 2, 4 and 5; ?1<R2/f<0.

Abstract: An optical imaging lens assembly includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a refractive power; wherein a radius of curvature of an object-side surface of the second lens element is R3, a radius of curvature of an image-side surface of the second lens element is R4, a radius of curvature of an object-side surface of the third lens element is R5, a radius of curvature of an image-side surface of the third lens element is R6, and the following conditions are satisfied: ?0.62<(R3?R4)/(R3+R4)<?0.51; 0.54<(R5?R6)/(R5+R6)<0.67.

Abstract: An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a negative refractive power; a fifth lens element with a refractive power; wherein a focal length of the optical imaging lens is f, focal lengths of the first, second, third, fourth and fifth lens elements are f1, f2, f3, f4, f5, respectively, a radius of curvature of an image-side surface of the first lens element is R2, satisfying: |f3|?|fn|, wherein n=1, 2, 4 and 5; ?1<R2/f<0.

Abstract: An optical imaging lens includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a positive refractive power; a third lens element with a negative refractive power; the aperture stop is located between an image-side surface of the first lens element and an object to be photographed; wherein a radius of curvature of an object-side surface of the first lens element is R1, a radius of curvature of the image-side surface of the first lens element is R2, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, and the following conditions are satisfied: ?2.0<(R1+R2)/(R1?R2)<?0.2; 2.0<CT2/CT3<4.0.

Abstract: A wide-angle image taking lens system includes an aperture stop and an optical assembly including: in order from an object side to an image side: first, second, third, fourth and fifth lens elements, the system has a total of five lens elements with refractive power, wherein Abbe numbers of the first and fifth lens element are V1, V5, a distance along an optical axis between the first and second lens element is T12, a central thickness of the first lens element is CT1, focal lengths of the system, second and third lens elements are f, f2, f3, maximum effective diameters of an object-side surface of the first lens element and an image-side surface of the fifth lens element are CA11, CA52, satisfying: 1.5<V1/V5<3; 1.1<T12/CT1<2.5; 0.2<|f/f3|+|f/f2|<1.5; 0.2<CA11/CA52<0.5.

Abstract: An imaging optical lens assembly includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a refractive power; a third lens element with a refractive power; a fourth lens element with a refractive power; a fifth lens element with a negative refractive power having an image-side surface being convex near an optical axis; wherein the image-side surface of the fifth lens element is formed with at least two inflection points, including a first inflection point and a second inflection point further away from the optical axis, a vertical distance from the first inflection point to the optical axis is Y_inf1, a vertical distance from the second inflection point to the optical axis is Y_inf2, satisfying: 1.7<Y_inf2/Y_inf1<2.1.

Abstract: An imaging lens includes an aperture stop and an optical assembly which includes: in order from an object side to an image side: a first lens element with a positive refractive power having a convex aspheric object-side surface and a concave aspheric image-side surface; a plastic second lens element with a positive refractive power having an aspheric object-side surface and a concave aspheric image-side surface; a plastic third lens element with a positive refractive power having aspheric object-side and image-side surfaces; a fourth lens element with a negative refractive power having a concave object-side surface and a convex image-side surface; a plastic fifth lens element with a positive refractive power having a convex aspheric object-side surface, a concave aspheric image-side surface and more than one inflection point. The imaging lens satisfies the following conditions: 0.3<(R5+R6)/(R5?R6)<1.15 and 1.2<TL/ImgH<1.65.

Abstract: An optical lens system includes an aperture stop and an optical assembly, the optical assembly includes, in order from an object side to an image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a positive refractive power; a fifth lens element with a negative refractive power; the aperture stop is located between an image-side surface of the first lens element and an object to be photographed. The optical lens system satisfies the following conditions: 0.55<TD/CA52<0.73; 20<Vd3?Vd2<40; 80<FOV<100; and 1.0<TL/ImgH<1.6.

Abstract: An imaging optical lens assembly includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a refractive power; a third lens element with a refractive power; a fourth lens element with a refractive power; a fifth lens element with a negative refractive power having an image-side surface being convex near an optical axis; wherein the image-side surface of the fifth lens element is formed with at least two inflection points, including a first inflection point and a second inflection point further away from the optical axis, a vertical distance from the first inflection point to the optical axis is Y_inf1, a vertical distance from the second inflection point to the optical axis is Y_inf2, satisfying: 1.7<Y_inf2/Y_inf1<2.1.

Abstract: A wide angle optical lens system includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a negative refractive power; a second lens element with a positive refractive power; a third lens element with a negative refractive power; a fourth lens element with a refractive power; a fifth lens element with a positive refractive power; a sixth lens element with a negative refractive power, wherein a focal length of the wide angle optical lens system is f, a focal length of the fifth lens element is f5, a radius of curvature of an object-side surface of the third lens element is R5, a radius of curvature of an image-side surface of the third lens element is R6, the following conditions are satisfied: 1.0<f/f5<3.8; ?3.5<(R6+R5)/(R6?R5)<0.6.

Abstract: A wide-angle image taking lens system includes an aperture stop and an optical assembly including: in order from an object side to an image side: first, second, third, fourth and fifth lens elements, the system has a total of five lens elements with refractive power, wherein Abbe numbers of the first and fifth lens element are V1, V5, a distance along an optical axis between the first and second lens element is T12, a central thickness of the first lens element is CT1, focal lengths of the system, second and third lens elements are f, f2, f3, maximum effective diameters of an object-side surface of the first lens element and an image-side surface of the fifth lens element are CA11, CA52, satisfying: 1.5<V1/V5<3; 1.1<T12/CT1<2.5; 0.2<|f/f3|+|f/f2|<1.5; 0.2<CA11/CA52<0.5.

Abstract: An optical lens system, sequentially arranged from an object side to an image side along an optical axis, includes: a stop, a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power, a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, and a fourth lens element with negative refractive power having a concave image-side surface with both being aspheric. Furthermore, the optical lens system satisfies conditions related to increase the field of view and reduce the total length as well as the sensitivity of assembly tolerance of the optical lens system.

Abstract: An optical lens system having a small F number, a wide angle of view, a short total length and a low manufacturing cost, includes, in order from an object side to an image side: a stop; a first lens element with a positive refractive power; a meniscus second lens element with a negative refractive power; a third lens element with a positive refractive power; a fourth lens element with a positive refractive power; a fifth lens element with a negative refractive power, the optical lens system has a focal length of f, the first lens element has a focal length f1, the third lens element has a focal length f3, the fourth lens element has a focal length f4, the fifth lens element has a focal length f5, and they satisfy the conditions: 0.4<f4/f<1.0; ?0.8<f5/f<?0.4; and f1/f<1.2<f3/f.

Abstract: An imaging lens apparatus comprises four lenses with refractive power by which lead the light from the object side to the image side: a first lens with a convex object-side surface and positive refractive power, at least one surface of the first lens is aspheric; an aperture stop set next to the first lens; a second lens which is a biconcave lens with negative refractive power, at least one surface of the second lens is aspheric; a third lens which is a positive meniscus lens with a concave object-side surface, both side of the third lens are aspheric; and a fourth lens which is a negative meniscus lens with a convex object-side surface, both side of the fourth lens are aspheric with at least one inflection point; and the imaging lens apparatus satisfy the conditions below: |1/slope_S8|>0.9; ?0.2<SAG_S8<0.1.

Abstract: An imaging lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from an object side to an image side. The first lens has positive refractive power and a convex object-side surface. The second lens has negative refractive power and a concave image-side surface. At least one surface of the image-side surface and an object-side surface of the second lens is aspheric. The third lens has positive refractive power, a concave object-side surface and a convex image-side surface of which at least one surface is aspheric. The fourth lens has positive refractive power, a concave object-side surface and a convex image-side surface of which at least one surface is aspheric. The fifth lens has negative refractive power, a concave object-side surface and a concave image-side surface which are aspheric.

Abstract: An imaging lens apparatus comprises four lenses with refractive power by which lead the light from the object side to the image side: a first lens with a convex object-side surface and positive refractive power, at least one surface of the first lens is aspheric; an aperture stop set next to the first lens; a second lens which is a biconcave lens with negative refractive power, at least one surface of the second lens is aspheric; a third lens which is a positive meniscus lens with a concave object-side surface, both side of the third lens are aspheric; and a fourth lens which is a negative meniscus lens with a convex object-side surface, both side of the fourth lens are aspheric with at least one inflection point; and the imaging lens apparatus satisfy the conditions below: |1/slope_S8|>0.9; ?0.2 <SAG_S8<0.1.

Abstract: An imaging lens apparatus comprises two lenses with refractive function, from the object side to the image side: a first lens which is a positive meniscus lens with a convex object-side surface, an aperture; and a second lens which is a negative meniscus lens with a concave object-side lens. Both surfaces of said first and second lens are aspheric, and the imaging lens apparatus satisfy the following equations: 1.35<N1<1.57; 1.60<N2<1.65; V1?50; V2<30; wherein, N1 is the refractivity of the first lens, N2 is the refractivity of the second lens, V1 is the abbe number of the first lens, and V2 is the abbe number of the second lens.