Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises a first lens having positive focal power, a second lens having focal power, a third lens having focal power, a fourth lens having focal power, a fifth lens having focal power, a sixth lens having positive focal power and a seventh lens having focal power that are arranged from the object side to the image side along the optical axis of the optical imaging lens. The effective focal length f of the optical imaging lens and the maximum half-field angle Semi-FOV of the optical imaging lens meet the condition that f * tan (Semi-FOV) is greater than or equal to 5.0 mm; the curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixthlens and the effective focal length f of the optical imaging lens satisfy the following conditions: f / R11 + f / R12 is larger than 5.0 and is less than 7.0; the curvature radius R13 of the object sideface of the seventh lens, the curvature radius R14 of the image side face of the seventh lens and the effective focal length f7 of the seventh lens meet the condition that f7 / (R13-R14) is smaller thanor equal to -2.0. According to the invention, the problem of unstable imaging quality of an optical imaging lens in the prior art is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. Background technique [0002] With the popularity of electronic products such as mobile phones and tablet computers, people's demand for electronic products is getting higher and higher, such as portable, light and thin, etc. At the same time, as the performance of charge-coupled device (CCD) and complementary metal-oxide semiconductor (complementary metal-oxide semiconductor, CMOS) image sensors improves and the size decreases, the corresponding imaging lens must also meet high imaging quality requirements. Moreover, the requirements for imaging quality are not only to meet the design object distance, but also the requirements for macro distance are getting higher and higher. [0003] That is to say, the optical imaging lens in the prior art has the problem of unstable imaging quality. Contents of the invention [0004] The...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of unstable imaging quality in the optical imaging lens in the prior art

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