Optical lens assembly

Abstract

The invention relates to the optical field, and provides an optical lens assembly. The optical lens assembly comprises a first lens, a second lens and a third lens which are coaxially and sequentially arrayed from an object space to an image space, wherein the first lens is provided with a convex first surface and a concave second surface, the second lens is provided with a third surface and a fourth surface, and the third lens is provided with a fifth surface and a six surface; all the surfaces are aspheric surfaces; the optical lens assembly satisfies the following conditions that: L / f is more than 1.1 and less than 1.35, f1 is more than 0, the absolute value of f / f1 is more than 0.5 and less than 1.2, f2 is more than 0, the absolute value of f2 / f is more than 0.9 and less than 2.2, f3 is less than 0, and the absolute value of f3 / f is more than 0.55 and less than 2.2, wherein f and L are effective focal length value and total length of the optical system respectively; and f1, f2 andf3 are effective focal lengths of the first, second and third lenses. The total length of the lens is shortened by adopting the three lenses and the combination of positive, positive and negative diopters; and each aberration is welled corrected so that good optical performance is obtained.

Description

technical field [0001] The invention relates to optical devices, in particular to an optical lens assembly. Background technique [0002] In digital imaging equipment, the optical imaging lens is a particularly important component, and the image quality of the lens directly determines the imaging performance of the digital imaging equipment. At the same time, digital products are constantly being updated, and are increasingly becoming thinner and shorter, and there are higher and higher requirements for optical lenses equipped in digital imaging equipment. Especially in lens modules with more than one million pixels and some micro-scanning devices, in order to ensure high imaging quality, brightness and sufficient field of view, digital imaging systems need a large space to inflect light, often by increasing the number of lenses The method of correcting the aberration and improving the image quality by using the lens material method; the length of this product is far from m...

AI Technical Summary

Problems solved by technology

Especially in lens modules with more than one million pixels and some micro-scanning devices, in order to ensure high imaging quality, brightness and sufficient field of view, digital imaging systems require a large space to inflect light, often by increasing the number of lenses and lens material to correct aberrations and improve imaging quality; the length of this product is far from meeting the requirements of thinness and shortness. On the one hand, it increases the size of the lens and also leads to an increase in production costs

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