Portable electronic device and optical imaging lens thereof

Abstract

The invention provides a portable electronic device and an optical imaging lens thereof. The optical imaging lens comprises four lenses from an object side to an image side sequentially, wherein the sum of three air gaps in an optical axis from the first lens to the fourth lens is Gaa, and the air interval in the optical axis from the third lens to the fourth lens is G34; and the Gaa and the G34 can fulfill the condition expression that Gaa / G34 is smaller than or equal to 6.0. The portable electronic device comprises a frame and an imaging module arranged in the frame, wherein the imaging module comprises an optical imaging lens, a lens cone, a module pedestal unit and an image sensor. According to the portable electronic device and the optical imaging lens thereof, the total length of the system can be shortened under a condition that the excellent optical performance and the system performance can be maintained by controlling the concave and convex curve arrangement, the conditional expression of the ratio of phototropism and opticity and / or parameter and other characteristics of each lens.

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 four-piece lens and its optical imaging lens. Background technique [0002] In recent years, the popularization of mobile phones and digital cameras has led to the vigorous development of photographic modules including optical imaging lenses, lens barrels, and image sensors. The thinner and lighter mobile phones and digital cameras have also increased the miniaturization requirements of photographic modules. With the technological progress and size reduction of Charge Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor (CMOS), the optical imaging lens installed in the camera module also needs to be reduced in size, but The good optical performance of the optical imaging lens is also necessary to take into account. [0003] According to U.S. Patent Publication No. US2011 / 0299178, the d...

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Problems solved by technology

[0003] According to U.S. Patent Publication No. US2011 / 0299178, the disclosed optical imaging lens has a four-piece lens structure, wherein the first lens has a negative refractive power and the object side and image side are both concave, and the second lens has a positive refractive power. The optical efficiency and the side of the object and the image are both convex. The total length of the system in this design is as high as 18~19mm, which cannot achieve miniaturization and the effect of taking into account optical performance, which is not conducive to the thin design of portable electronic products such as mobile phones and digital cameras.

[0004] In addition, according to U.S. Patent Publication Nos. US2011 / 0188132 and US2011 / 0188133, the disclosed optical imaging lenses all have a four-piece lens structure, and the refractive powers of the first and second lenses are both negative, but the first , There is a considerable air gap between the second lenses, and the length of the system cannot be effectively shortened, which is not conducive to the thin design of portable electronic products such as mobile phones and digital cameras

[0005] In addition, US Patent Publication Nos. US7345830, US7375903, US8253843 and US Patent Publication No. US2010 / 0157453 also disclose a four-piece optical imaging lens, although the refractive power of the first and second lenses is preferably positive / negative configuration, but the image side of the first lens and the object side of the second lens are all concave, so there must be a considerable air gap between the second and third lenses, and the effect of shortening the system length cannot be achieved, which is not conducive to Thin design of portable electronic products such as mobile phones and digital cameras

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