Portable electronic device and its optical imaging lens

Abstract

The invention discloses an optical imaging lens, which sequentially includes first, second, third, fourth, and fifth lenses from the object side to the image side, and satisfies the following relationship: T4 / T2≦1.55; T2 represents the A thickness of the second lens on the optical axis, T4 represents a thickness of the fourth lens on the optical axis. The present invention also discloses a portable electronic device, comprising: a casing and an image module installed in the casing, the image module includes: the above-mentioned optical imaging lens, a lens barrel, a module rear seat unit, an image sensor. The present invention shortens the lens length while maintaining good optical performance by controlling the concave-convex surface arrangement of each lens and controlling related parameters with at least one relational expression.

Description

technical field [0001] The present invention is related to a portable electronic device and its optical imaging lens, and especially related to a portable electronic device using a five-piece lens and its optical imaging lens. Background technique [0002] In recent years, the popularity of portable electronic products such as mobile phones, digital cameras, tablet computers, and personal digital assistants (Personal Digital Assistant, referred to as PDA) has led to the vigorous development of image modules including optical imaging lenses, module backseat units, and image sensors. Portable electronic products The thinner and lighter size of the image module also makes the miniaturization demand of the image module higher and higher. With the reduction in size, the optical imaging lens installed in the image module also needs to be reduced in size, but the good optical performance of the optical imaging lens must also be taken into consideration. If the image module is used...

AI Technical Summary

Problems solved by technology

[0003] As far as the five-element lens structure is concerned, the distance from the object side of the first lens to the imaging surface on the optical axis is long in the past, which is not conducive to the thinning of portable electronic products. Therefore, it is extremely necessary to develop a lens with good image quality and short length. the lens

However, the design of optical imaging lens is not simply to scale down the lens with good imaging quality to produce an optical imaging lens with both imaging quality and miniaturization. The design process involves material properties, and production and assembly yields must also be taken into consideration. Due to practical problems in production, the technical difficulty of miniaturized lenses is obviously higher than that of traditional lenses

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