Optical imaging lens and electronic device utilizing same

Abstract

The invention relates to an optical imaging lens and an electronic device utilizing the same. The optical imaging lens sequentially comprises four lenses with refractive rate along the optical axis from an object side and an image side. An image side of the first lens is provided with a concave surface portion in the vicinity of the circumference, the second lens is provided with positive refractive rate capable of providing required positive refractive rate for the optical imaging lens, and an image side of the third lens is provided with a convex surface portion in the vicinity of the optical axis. An image side of the fourth lens is provided with a concave surface portion in the vicinity of the optical axis and a convex surface portion in the vicinity of the circumference. The distance between the image side and an imaging side of the fourth lens is BFL, the air gap between the second lens and the third lens on the optical axis is G23, and the distance BFL and the air gap G23 meet the condition of 2.5<=BFL / G23. The electronic device comprises a casing and an imaging module. The imaging module comprises the optical imaging lens, a lens cone, a module holder unit and an image sensor. The optical imaging lens can meet the requirements for large vision field angle and short length.

Description

technical field [0001] The invention relates to an optical lens, in particular to an optical imaging lens and an electronic device using the optical imaging lens. Background technique [0002] In recent years, the popularization of portable electronic products such as mobile phones and digital cameras has led to the vigorous development of photography module related technologies. The photography module mainly includes components such as optical imaging lens, module holder unit and sensor. The thinner and lighter trend of digital cameras has also increased the miniaturization requirements of photographic modules. ) technological progress and size reduction, the length of the optical imaging lens loaded in the camera module also needs to be shortened accordingly, but in order to avoid the decline of photographic effect and quality, good optical performance must still be taken into account when shortening the length of the optical imaging lens. [0003] US Patent Publication N...

AI Technical Summary

Problems solved by technology

Among them, the lens length of US Patent No. US8179616 is more than 11mm, which is not conducive to the thin design of portable electronic products such as mobile phones and digital cameras.

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