Mobile device and optical imaging lens thereof
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsShih-Han Chen, Yan Bin Chen, Baina Chen
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Abstract
The present invention provides a mobile device and an optical imaging lens thereof. The optical imaging lens comprises six lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.
Claims19
An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising a first lens element, an aperture stop, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, each of said first, second, third, fourth, fifth and sixth lens elements having refractive power, an object-side surface facing toward the object side and an image-side surface facing toward the image side axis, wherein:
- said image-side surface of said first lens element comprises a concave portion in a vicinity of the optical axis;
- said image-side surface of said second lens element comprises a convex portion in a vicinity of the optical axis;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of the optical axis;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of a periphery of the third lens element;
- said object-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis;
- said fifth lens element has negative refractive power, and said image-side surface of said fifth lens element comprises a concave portion in a vicinity of the optical axis;
- and
- said image-side surface of said sixth lens element comprises a concave portion in a vicinity of the optical axis and made of plastic;
- and
- wherein said optical imaging lens comprises no other lenses having refractive power beyond the six lens elements, and
- wherein a central thickness of the first lens element along the optical axis is T1, an effective focal length of the optical imaging lens, is EFL, and
- wherein EFL and T1 satisfy the equation:
- EFL/T1≦13.
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 a first lens element, an aperture stop, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, each of said first, second, third, fourth, fifth and sixth lens elements having refractive power, an object-side surface facing toward the object side and an image-side surface facing toward the image side axis, wherein:
- said image-side surface of said first lens element comprises a concave portion in a vicinity of the optical axis;
- said image-side surface of said second lens element comprises a convex portion in a vicinity of the optical axis;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of the optical axis;
- said object-side surface of said third lens element comprises a concave portion in a vicinity of a periphery of the third lens element;
- said object-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis;
- said fifth lens element has negative refractive power, and said image-side surface of said fifth lens element comprises a concave portion in a vicinity of the optical axis;
- and
- said image-side surface of said sixth lens element comprises a concave portion in a vicinity of the optical axis and made of plastic;
- and
- wherein a central thickness of the first lens element along the optical axis is T1, an effective focal length of the optical imaging lens, is EFL, and
- wherein EFL and T1 satisfy the equation:
- EFL/T1≦13;
- and
- wherein said optical imaging lens comprises no other lenses having refractive power beyond the six lens elements;
- and
- a lens barrel for positioning the optical imaging lens;
- a module housing unit for positioning the lens barrel;
- and
- an image sensor positioned at the image side of the optical imaging lens.
Dependencies are inferred from the claim text.