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, including: 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.
Claims29
An optical imaging system for pickup, sequentially arranged from an object side to an image side with six non-cemented lens elements comprising:
- 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 refractive power;
- a fourth lens element with refractive power, both object-side and image-side surfaces of the fourth lens element being aspheric;
- a fifth lens element with refractive power, both object-side and image-side surfaces of the fifth lens element being aspheric;
- and
- a plastic sixth lens element with refractive power having a concave image-side surface, both object-side and image-side surfaces of the sixth lens element being aspheric, and the image-side surface of the sixth lens element having at least one inflection point;
- wherein the optical imaging system for pickup further comprises a stop disposed between an imaged object and the third lens element, TTL is an axial distance from the object-side surface of the first lens element to an image plane, ImgH is a maximum image height of the optical imaging system, f is a focal length of the optical imaging system for pickup, f5 is a focal length of the fifth lens element, f6 is a focal length of the sixth lens element, YC is a vertical distance between an outermost horizontal vertex of the image side surface of the sixth lens element and an optical axis, and the following relation is satisfied:
- YC/f<0.8;
- |f/f5|+|f/f6|<3.5;
- and
- TTL/ImgH<2.1.
An optical imaging system for pickup, sequentially arranged from an object side to an image side with six non-cemented lens elements comprising:
- a first lens element with positive refractive power, having a convex object-side surface;
- a second lens element with refractive power, having a concave image-side surface;
- a third lens element with refractive power;
- a fourth lens element with refractive power, both object-side and image-side surfaces of the fourth lens element being aspheric;
- a fifth lens element with refractive power, both object-side and image-side surfaces of the fifth lens element being aspheric;
- and
- a plastic sixth lens element with refractive power having a concave image-side surface, both object-side and image-side surfaces of the sixth lens element being aspheric, and the image-side surface of the sixth lens element having at least one inflection point;
- wherein TTL is an axial distance from the object-side surface of the first lens element to an image plane, ImgH is a maximum image height of the optical imaging system, f is a focal length of the optical imaging system for pickup, f5 is a focal length of the fifth lens element, f6 is a focal length of the sixth lens element, and YC is a vertical distance between an outermost horizontal vertex of the image side surface of the sixth lens element and an optical axis, and the following relations are satisfied:
- YC/f<0.8;
- |f/f5|+|f/f6|<3.5;
- and
- TTL/ImgH<2.1.
An optical imaging system for pickup, sequentially arranged from an object side to an image side with six non-cemented lens elements comprising:
- a first lens element with positive refractive power, having a convex object-side surface;
- a second lens element with refractive power;
- a third lens element with refractive power;
- a plastic fourth lens element with refractive power, both object-side and image-side surfaces of the fourth lens element being aspheric;
- a plastic fifth lens element with refractive power, both object-side and image-side surfaces of the fifth lens element being aspheric;
- and
- a plastic sixth lens element with refractive power having a concave image-side surface, both object-side and image-side surfaces of the sixth lens element being aspheric, and the image-side surface of the sixth lens element having at least one inflection point;
- wherein TTL is an axial distance from the object-side surface of the first lens element to an image plane, ImgH is a maximum image height of the optical imaging system, f is a focal length of the optical imaging system for pickup, f5 is a focal length of the fifth lens element, f6 is a focal length of the sixth lens element, and YC is a vertical distance between an outermost horizontal vertex of the image side surface of the sixth lens element and an optical axis, R3 is a curvature radius of the object-side surface of the second lens element, R4 is a curvature radius of the image-side surface of the second lens element, and the following relations are satisfied:
- YC/f<0.8;
- |f/f5|+|f/f6|<3.5;
- 0<(R3+R4)/(R3−R4)<1.5;
- and
- TTL/ImgH<2.1.
Dependencies are inferred from the claim text.