Optical imaging lens
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsJia Sin Jhang, Guangyun Li, Baina Chen
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Abstract
Present embodiments provide for an optical imaging lens. The optical imaging lens comprises a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element 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 and designing parameters satisfying at least one inequality, the optical imaging lens shows better optical characteristics and enlarge field angle the total length of the optical imaging lens is shortened.
Claims20
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, fifth and sixth lens elements, each of said first, second, third, fourth, fifth and sixth lens elements having refracting power, an object-side surface facing toward said object side and an image-side surface facing toward said image side, wherein:
- said first lens element has positive refracting power, and said image-side surface of said first lens element comprises a concave portion in a vicinity of a periphery of said first lens element;
- said second lens element has negative refracting power, 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 third lens element has positive refracting power, and the material of said third lens element is plastic;
- the material of said fourth lens element is plastic;
- the material of said fifth lens element is plastic;
- the material of said sixth lens element is plastic;
- one of said fourth, fifth and sixth lens element has positive refracting power and the rest two of said fourth, fifth and sixth lens element has negative refracting power;
- said optical imaging lens comprises no other lenses having refracting power beyond said first, second, third, fourth, fifth and sixth lens elements;
- an effective focal length of said optical imaging lens is represented by EFL, and a distance between said object-side surface of said first lens element and an image plane along the optical axis is represented by TTL, and EFL and TTL satisfy the equations:
- EFL/TTL≧1 and TTL≦18 mm.
Dependencies are inferred from the claim text.