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US 9,851,533 B2Granted
Mobile device and optical imaging lens thereof
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsMatthew Bone, Maozong Lin, Shan Huang
Life of this patent
Estimating the term…
Abstract
Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens may comprise an aperture stop and five lens elements positioned sequentially from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least two inequalities, the optical imaging lens may exhibit better optical characteristics and the total length of the optical imaging lens may be shortened.
Claims14
An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising an aperture stop, and first, second, third, fourth and fifth lens elements, each of said first, second, third, fourth and fifth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein:
- said image-side surface of said first lens element comprises a convex portion in a vicinity of a periphery of said first lens element;
- said object-side surface of said second lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said second lens element comprises a concave portion in a vicinity of a periphery of said second lens element;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of the optical axis, and said image-side surface of said third lens element comprises a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said third lens element;
- said object-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis, and said image-side surface of said fourth lens element comprises a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said fourth lens element;
- said fifth lens element has negative refracting power, said object-side surface of said fifth lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said fifth lens element comprises a convex portion in a vicinity of a periphery of said fifth lens element;
- said optical imaging lens comprises no other lenses having refracting power beyond said five lens elements;
- and
- an abbe number of said second lens element is represented by V2, an abbe number of said fourth lens element is represented by V4, an effective focal length of said optical imaging lens is represented by EFL, a central thickness of said second lens element is represented by T2, all four air gaps from said first lens element to said fifth lens element along the optical axis is represented by AAG, an air gap between said second lens element and said third lens element along the optical axis is represented by G23, an air gap between said fourth lens element and said fifth lens element along the optical axis is represented by G45, a sum of central thicknesses of all five lens elements is represented by ALT, a central thickness of said fifth lens element is represented by T5, and V2, V4, EFL, T2, AAG, G23, G45, ALT and T5 satisfy the inequalities:
- |V2−V4|≦20;
- EFL/T2≦13.5;
- AAG/(G23+G45)≦1.8;
- and
- ALT/T5≦4.0.
10 more elements
A mobile device, comprising:
- a housing;
- and
- a photography module positioned in the housing and comprising:
- an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising an aperture stop, and first, second, third, fourth and fifth lens elements, each of said first, second, third, fourth and fifth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein:
- said image-side surface of said first lens element comprises a convex portion in a vicinity of a periphery of said first lens element;
- said object-side surface of said second lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said second lens element comprises a concave portion in a vicinity of a periphery of said second lens element;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of the optical axis, and said image-side surface of said third lens element comprises a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said third lens element;
- said object-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis, and said image-side surface of said fourth lens element comprises a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said fourth lens element;
- said fifth lens element has negative refracting power, said object-side surface of said fifth lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said fifth lens element comprises a convex portion in a vicinity of a periphery of said fifth lens element;
- said optical imaging lens comprises no other lenses having refracting power beyond said five lens elements;
- and
- an abbe number of said second lens element is represented by V2, an abbe number of said fourth lens element is represented by V4, an effective focal length of said optical imaging lens is represented by EFL, a central thickness of said second lens element is represented by T2, all four air gaps from said first lens element to said fifth lens element along the optical axis is represented by AAG, an air gap between said second lens element and said third lens element along the optical axis is represented by G23, an air gap between said fourth lens element and said fifth lens element along the optical axis is represented by G45, a sum of central thicknesses of all five lens elements is represented by ALT, a central thickness of said fifth lens element is represented by T5, and V2, V4, EFL, T2, AAG, G23, G45, ALT and T5 satisfy the inequalities:
- |V2−V4|≦20;
- EFL/T2≦13.5;
- AAG/(G23+G45)≦1.8;
- and
- ALT/T5≦4;
- a lens barrel for positioning the optical imaging lens;
- a module housing unit for positioning the lens barrel;
- a substrate for positioning the module housing unit;
- and
- an image sensor positioned at the image side of the optical imaging lens.
19 more elements
Dependencies are inferred from the claim text.