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US 8,284,291 B2Granted
Photographing optical lens assembly
AssigneeLargan Precision Co., Ltd.
InventorsHsin-Hsuan Huang, Tsung-Han Tsai
Life of this patent
Estimating the term…
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, a second lens element with negative refractive, a third lens element, a fourth lens element, and a fifth lens element having a concave image-side surface and having at least one inflecting point.
Claims26
A photographing optical lens assembly comprising, in order from an object side to an image side:
- 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;
- a fourth lens element;
- and
- a fifth lens element having a concave image-side surface and made of plastic material, wherein the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof;
- wherein a focal length of the photographing optical lens assembly is f, a focal length of the first lens element is f1;
- the photographing optical lens assembly further comprises an aperture stop and an image sensor, wherein a distance on the optical axis between the aperture stop and the image plane is SL;
- a distance on the optical axis between the object-side surface of the first lens element and the image plane is TTL, when the incident angle θ1 of the light is 36 degrees and the light passes through the center of the aperture stop, the vertical distance from the optical axis to the intersection point of the light and the image-side surface of the fifth lens element is Yc1, the image sensor is located on the image plane, a half of a diagonal length of an effective pixel area of the image sensor is ImgH, and they satisfy the following relationships:
- 0.7<f/f1<2.0;
- 0.7<SL/TTL<1.2;
- and
- 0.3<Yc1/ImgH<0.9.
10 more elements
A photographing optical lens assembly comprising, in order from an object side to an image side:
- to 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;
- a fourth lens element with positive refractive power, wherein at least one surface of the fourth lens element is aspheric;
- a fifth lens element with negative refractive power having a concave image-side surface, wherein at least one surface of the fifth lens element is aspheric;
- wherein a radius of curvature of the object-side surface of the fifth lens element is R9, a radius of curvature of the image-side surface of the fifth lens element is R10;
- the photographing optical lens assembly further comprises an aperture stop and an image sensor, wherein a distance on the optical axis between the aperture stop and the image plane is SL, a distance on the optical axis between the object-side surface of the first lens element and the image plane is TTL, when the incident angle θ1 of the light is 36 degrees and the light passes through the center of the aperture stop, the vertical distance from the optical axis to the intersection point of the light and the image-side surface of the fifth lens element is Yc1, the image sensor is located on the image plane, a half of a diagonal length of an effective pixel area of the image sensor is ImgH, and they satisfy the following relationships:
- −5<R10/R9<5;
- 0.7<SL/TTL<1.2;
- and
- 0.3<Yc1/ImgH<0.9.
8 more elements
A photographing optical lens assembly comprising, in order from an object side to an image side:
- 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 with positive refractive power having a concave object-side surface and a convex image-side surface, wherein at least one surface of the fourth lens element is aspheric;
- a fifth lens element with negative refractive power having a concave image-side surface, wherein the fifth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof;
- wherein a maximal field of view of the photographing optical lens assembly is FOV, a radius of curvature of the object-side surface of the fifth lens element is R9, a radius of curvature of the image-side surface of the fifth lens element is R10, and they satisfying the following relationships:
- FOV>72;
- and
- 0<(R9+R10)/(R9−R10)<1.7.
6 more elements
Dependencies are inferred from the claim text.