Imaging lens, and electronic apparatus including the same

摘要

An imaging lens includes first to fourth 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 maybe achieved while maintaining good optical performance.

主权项

1. An imaging lens comprising a first lens element, a second lens element, a third lens element, and a fourth 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 and said fourth 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 image-side surface of said first lens element has a convex portion in a vicinity of a periphery of said first lens element; said object-side surface of said second lens element has a concave portion in a vicinity of a periphery of said second lens element; said third lens element has a positive refractive power, and said image-side surface of said third lens element has a convex portion in a vicinity of a periphery of said third lens element; said fourth lens element is made of a plastic material, and said object-side surface of said fourth lens element has a concave portion in a vicinity of the optical axis, and a convex portion in a vicinity of a periphery of said fourth 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 and said fourth lens element.