Composite lens system

Abstract

This invention relates to a compound lens system including: a first, a second and a third lens, in which, the focus of the first and the third lenses are positive and the focus of the second is negative and the second and the third lenses are in a non-spherical structure, which has good performance of optical image.

Description

【Technical field】 [0001] The invention relates to a compound lens system, in particular to a compound lens system applicable to mobile phones. 【Background technique】 [0002] A traditional digital camera lens usually consists of several elements in order to correct for optical aberrations. In existing digital camera lenses, spherical lenses are used, which inevitably bring about spherical aberration. To correct spherical aberration, it is necessary to increase the number of lenses, thereby increasing the volume and weight of the lenses. [0003] An existing digital camera lens includes a first lens, a second lens, a third lens and a fourth lens, wherein the first lens is a biconvex lens, the second lens is a biconcave lens, and the third lens is a new The moon lens and the fourth lens are biconvex lenses; the materials of all the lenses are glass materials and the lenses are spherical lenses. After adopting the above structure, the size of the lens is small, and the lens i...

AI Technical Summary

Problems solved by technology

After adopting the above structure, the lens size is small, and the lenses are all made of spherical glass lenses. Although the processing is easy, but the material is too much to use glass materials to make glass lenses, which increases the weight of the lens, and inevitably brings spherical aberration, which affects imaging. performance

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