Five-piece wide-angle lens group

Abstract

The invention relates to a five-piece wide-angle lens group. The five-piece wide-angle lens group sequentially comprises a first lens with negative refractive power, an aperture, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power from an object side to an image side, wherein the thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the following conditions are satisfied: 0.69<CT4 / (CT1+CT3+CT5)<1.32 and 1.83<(CT1+CT5) / CT3<4.06. Therefore, the invention provides the five-piece wide-angle lens group which has the advantages of wide viewing angle, high resolution capability, short lens length and small distortion on the premise of considering the productivity of the lens.

Description

technical field [0001] The invention relates to a five-piece wide-angle lens set, in particular to a miniaturized five-piece wide-angle lens set applied to electronic products. Background technique [0002] With the development of high-end mobile devices such as smart phones and tablet computers, high-quality small camera lenses have become standard equipment, and with the popularity of online communities, more and more people like to take pictures or take selfies and share them with others , and such as game consoles, driving recorders, security camera lenses, etc., the demand for shooting angles is also increasing, so the requirements for lens shooting angles and image quality are becoming more and more stringent. Prior art US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion (distortion) is too large, and such as US 8593737, US8576497, US 8395853, the maximum field of view (FOV) Both are less than 85 degrees...

AI Technical Summary

Problems solved by technology

Prior art US 8335043 and US 8576497 use 2 lens groups, 5 to 6 lenses to achieve the purpose of large angle, but the distortion (distortion) is too large, and such as US 8593737, US8576497, US 8395853, the maximum field of view (FOV) Both are less than 85 degrees, and the total length (TL) of the lens group is also too long

[0003] Secondly, for photographic lenses used in biomedicine, driving recorders, video cameras, or other electronic products, the requirements for large apertures do not need to be too strict. Instead, the requirements such as picture angle and lens length are the problems that the industry needs to further solve. However, the current photographic lenses traditionally mounted on electronic products in the aforementioned fields mostly adopt a four-piece lens structure, all of which have defects such as insufficient picture angles and excessively long lens lengths.

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