Portable electronic device and optical imaging lens thereof

Abstract

The invention provides a portable electronic device and an optical imaging lens thereof. From an object side to an image side, the optical imaging lens comprises an aperture, a first lens, a second lens, a third lens, a fourth lens and a fifth lens sequentially. The first lens is provided with a positive reflective index and the image side of the first lens is provided with a convex surface portion disposed near a circumference. The object side of the second lens is provided with a concave surface portion disposed near the circumference. The third lens is provided with a positive reflective index, the object side of the third lens is provided with a concave surface portion located near an optical axis, and the image side of the third lens is provided with a convex surface. The object side of the fourth lens is provided with a concave surface portion disposed near the circumference. The fifth lens is made of plastic material, and the object side of the fifth lens includes a convex surface portion disposed near the optical axis. In the invention, the total system length is shortened with good optical properties and ensured system performance.

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 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 demand for miniaturization 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] U.S. Patent Nos. 8189273 and 7911711, Taiwan Patent No. M368072,...

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Problems solved by technology

[0003] U.S. Patent Nos. 8189273 and 7911711, Taiwan Patent No. M368072, and Japanese Patent Publication No. 2010256608 all disclose five-piece optical imaging lenses, but the length from the first lens to the imaging plane is still long, which is not conducive to mobile phones and digital cameras. Thin design of portable electronic products such as cameras

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