Imaging optical lens group

Abstract

The invention discloses an imaging optical lens group, which comprises the following components from the object side to the image side: a first lens with positive refracting power, a second lens with negative refracting power, a third lens with positive refracting power, a fourth lens with positive refracting power, a fifth lens, and an aperture. The front surface of the first lens is a convex surface; and the front surface of the third lens is a concave surface and the rear surface of the third lens is a convex surface. The aperture is arranged between an object to be photographed and the second lens. The number of the lenses with the refracting power is only five in the imaging optical lens group. Due to the lens structure and the arrangement mode, the volume of the lens group can be effectively reduced; the sensitivity of an optical system is reduced; and higher image resolution can be acquired simultaneously.

Description

technical field [0001] The invention relates to an image-taking optical lens group, in particular to a miniaturized image-taking optical lens group applied to a camera phone. Background technique [0002] In recent years, with the rise of camera phones, the demand for miniaturized photographic lenses has increased day by day, and the photosensitive elements of general photographic lenses are nothing more than photocoupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductors (Complementary Metal -Oxide Semiconductor, CMOS), and due to the advancement of semiconductor process technology, the pixel area of ​​the photosensitive element has been reduced, and the miniaturized photographic lens has gradually developed into the high-pixel field. [0003] Common high-resolution mobile phone lenses mostly adopt a four-piece lens structure, as shown in the US patent specification US7365920B2 (authorized date: April 29, 2008); In the case of gradually shrink...

AI Technical Summary

Problems solved by technology

[0003] Common high-resolution mobile phone lenses mostly adopt a four-piece lens structure, as shown in the US patent specification US7365920B2 (authorized date: April 29, 2008); In the case of gradually shrinking pixel area and the continuous improvement of the system's requirements for imaging quality, the common four-piece lens group will not be able to meet the use of higher-end photographic lens modules; in order to achieve higher pixel and performance imaging quality , it is necessary to increase the number of lenses, but too many lenses will easily increase the total optical length of the lens, and it is difficult to have the characteristics of miniaturization

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