Optical image capturing system

Abstract

The invention discloses an optical imaging system. The optical imaging system sequentially comprises the following lenses from an object side to an image side along an optical axis: a first lens having positive focal power; a second lens having negative focal power; a diaphragm; a third lens having focal power; a fourth lens which has negative focal power, wherein the image side surface of the fourth lens is a convex surface; a fifth lens having focal power; a sixth lens which has focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having focal power. The distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis and half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging system satisfy the following formula: 1.0 < TTL / ImgH < 1.3.

Description

technical field

[0001] The present application relates to the field of optical elements, in particular, to an optical imaging system. Background technique

[0002] With the development of society, portable electronic products such as smartphones and tablet computers have become indispensable tools in people's lives. At present, portable electronic products such as smartphones and tablet computers on the market are gradually becoming smaller, which makes the optical imaging system applied to them suitable for portable electronic products. Satisfying the characteristics of miniaturization, thinness and lightness, undoubtedly increases the difficulty of designing the optical imaging system. In addition, as the performance of the image sensor improves and the size decreases, the design freedom of the corresponding optical imaging system becomes smaller and smaller, which further increases the difficulty of designing the optical imaging system.

[0003] How to rationally set te...

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