Mobile device and optical imaging lens thereof
AssigneeGenius Electronic Optical Co., Ltd.
InventorYu-Jen LIN
Life of this patent
Estimating the term…
Abstract
Present embodiments may 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 one inequality, 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 first, second, third, fourth, and fifth lens elements, each of said first, second, third, fourth, and fifth lens elements having refracting power, an object-side surface facing toward said object side and an image-side surface facing toward said image side and a central thickness defined along said optical axis, 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 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 convex portion in a vicinity of a periphery of said third lens element;
- said image-side surface of said third lens element comprises a concave portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said third lens element;
- said fourth lens element has positive refracting power, said object-side surface of said fourth lens element comprises a concave portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said fourth lens element;
- said image-side surface of said fifth lens element comprises a concave portion in a vicinity of said optical axis;
- said optical imaging lens comprises no other lenses having refracting power beyond said first, second, third, fourth , and fifth lens elements, a central thickness of said first lens element is represented by T1, a central thickness of said second lens element is represented by T2, an air gap between said second lens element and said third lens element along said optical axis is represented by G23, T1, T2, and G23 satisfy the equation:
- (T1+T2)/G23≧3.65.
A mobile device, comprising:
- a housing;
- and
- a photography module positioned in said housing and comprising:
- an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising first, second, third, fourth, and fifth lens elements, each of said first, second, third, fourth, and fifth lens elements having refracting power, an object-side surface facing toward said object side and an image-side surface facing toward said image side and a central thickness defined along said optical axis, 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 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 convex portion in a vicinity of a periphery of said third lens element;
- said image-side surface of said third lens element comprises a concave portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said third lens element;
- said fourth lens element has positive refracting power, said object-side surface of said fourth lens element comprises a concave portion in a vicinity of said optical axis and a concave portion in a vicinity of a periphery of said fourth lens element;
- said image-side surface of said fifth lens element comprises a concave portion in a vicinity of said optical axis;
- said optical imaging lens comprises no other lenses having refracting power beyond said first, second, third, fourth , and fifth lens elements, a central thickness of said first lens element is represented by T1, a central thickness of said second lens element is represented by T2, an air gap between said second lens element and said third lens element along said optical axis is represented by G23, T1, T2, and G23 satisfy the equation:
- (T1+T2)/G23≧3.65;
- a lens barrel for positioning said optical imaging lens;
- a module housing unit for positioning said lens barrel;
- and
- an image sensor positioned at said image side of said optical imaging lens.
Dependencies are inferred from the claim text.