Optical imaging system for pickup
AssigneeLargan Precision Co., Ltd.
InventorHsin-Hsuan HUANG
Life of this patent
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Abstract
An optical imaging system for pickup, sequentially arranged from an object side to an image side, comprising: 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 refractive power, the fourth lens element with refractive power, the fifth lens element with refractive power; the sixth lens element made of plastic, the sixth lens with refractive power having a concave image-side surface with both being aspheric, and the image-side surface having at least one inflection point.
Claims34
An optical imaging system for pickup comprising six lens elements, the six lens elements being, 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 six lens element, each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the image-side surface of the first lens element is concave in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the image-side surface of the third lens element is convex in a paraxial region thereof, the fifth lens element has positive refractive power, the image-side surface of the fifth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is aspheric, the sixth lens element has negative refractive power, the image-side surface of the sixth lens element is concave in a paraxial region thereof, the image-side surface of the sixth lens element is aspheric and has at least one inflection point, and each of the six lens elements is a single lens element and not cemented to each other.
An optical imaging system for pickup comprising six lens elements, the six lens elements being, 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 six lens element, each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the image-side surface of the second lens element is concave in a paraxial region thereof, the image-side surface of the third lens element is convex in a paraxial region thereof, the fifth lens element has positive refractive power, the image-side surface of the fifth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is aspheric, the image-side surface of the sixth lens element is concave in a paraxial region thereof, the image-side surface of the sixth lens element is aspheric and has at least one inflection point;
- wherein a focal length of the optical imaging system for pickup is f, a focal length of the fifth lens element f5, a focal length of the sixth lens element is f6, and the following condition is satisfied:
- 1.8<|f/f5|+|f/f6|<3.5.
An optical imaging system for pickup comprising six lens elements, the six lens elements being, 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 six lens element, each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the image-side surface of the third lens element is convex in a paraxial region thereof, the fifth lens element has positive refractive power, the image-side surface of the fifth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is aspheric, the image-side surface of the sixth lens element is concave in a paraxial region thereof, the image-side surface of the sixth lens element is aspheric and has at least one inflection point, and each of the six lens elements is a single lens element and not cemented to each other;
- wherein an axial distance between the object-side surface of the first lens element and an image plane is TTL, half of diagonal length of an effective photosensitive area of an image sensor is ImgH, and the following condition is satisfied:
- TTL/ImgH≤2.02.
Dependencies are inferred from the claim text.