Imaging lens and electronic apparatus including the same
AssigneeGenius Electronics Optical (Xiamen) Co., Ltd.
InventorsSheng-Wei Hsu, Tzu-Chien Tang
Life of this patent
Estimating the term…
Abstract
An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.
Claims15
An imaging lens comprising a first lens element, an aperture stop, a second lens element, a third lens element, a fourth lens element and a fifth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element, said fourth lens element and said fifth lens element having a refractive power, an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:
- said first lens element has a negative refractive power, and said image-side surface of said first lens element has a concave portion in a vicinity of a periphery of said first lens element;
- said object-side surface of said second lens element has a convex portion in a vicinity of a periphery of said second lens element, and said image-side surface of said second lens element has a convex portion in a vicinity of the periphery of said second lens element;
- said third lens element is made of a plastic material;
- said object-side surface of said fourth lens element has a concave portion in a vicinity of the periphery of the fourth lens element, and said image-side surface of said fourth lens element has a convex portion in a vicinity of a periphery of said fourth lens element;
- said object-side surface of said fifth lens element has a concave portion in a vicinity of a periphery of said fifth lens element;
- and
- said imaging lens does not include any lens element with refractive power other than said first lens element, said second lens element, said third lens element, said fourth lens element and said fifth lens element, and satisfies 1.5≦(G12+G45)/T3≦5 and T3/G12≦1.1, where G12 represents an air gap length between said first lens element and said second lens element at the optical axis, G45 represents an air gap length between said fourth lens element and said fifth lens element at the optical axis, and T3 represents a thickness of said third lens element at the optical axis,
- wherein an Abbe number of said first lens element is smaller than an Abbe number of said fifth lens element.
Dependencies are inferred from the claim text.