Imaging camera lens

Abstract

The invention provides an imaging camera lens which comprises a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power and a fourth lens with negative optical power from an object side or an image side in sequence. The imaging camera lens satisfies conditional expressions: 0.3<F1 / TTL<1.0, -7.0<F2 / TTL<-5.5, 0.95<F3 / TTL<2.0 and -3.5<F4 / TTL<-2.5, wherein the TTL is the distance from the object end surface of the first lens to an imaging surface along the optical axis direction; and the F1, the F2, the F3 and the F4 respectively adopt focal distances of the first lens, the second lens, the third lens and the fourth lens. The whole length of the imaging camera lens is limited through limiting specific values between the F1 and the TTL, the F2 and the TTL, the F3 and the TTl and the F4 and the TTL, so that the imaging camera lens has smaller volume.

Description

technical field [0001] The invention relates to imaging technology, in particular to an imaging lens. Background technique [0002] With the continuous development of science and technology, electronic products are constantly developing towards the direction of thin, light, small and multi-functional, and in electronic products, such as digital cameras, computers, etc., besides imaging devices, even mobile phones or personal digital assistants (PDAs) ) and other devices are also required to add an imaging device; and in order to be convenient to carry and meet the needs of humanization, the imaging device not only needs to have good imaging quality, but also needs a lower cost to effectively improve the imaging device. applicability. [0003] Because the traditional spherical ground glass lens has more material choices, and glass lens is more beneficial to correct chromatic aberration, it has been widely used in the industry, but spherical ground glass lens is more difficul...

AI Technical Summary

Problems solved by technology

[0003] Because the traditional spherical ground glass lens has more material choices, and glass lens is more beneficial to correct chromatic aberration, it has been widely used in the industry, but spherical ground glass lens is difficult to correct aberration

In order to improve the shortcomings of the above-mentioned traditional spherical ground glass lenses, the current image-taking devices have used aspheric plastic lenses or aspheric molded glass sheets to obtain better imaging quality, but the structure of the above-mentioned optical image-taking devices More lens combinations are required to obtain better optical characteristics, resulting in the length of the entire optical imaging device being too large, making the optical imaging device unable to have a smaller volume or lower cost, and it is difficult to meet the requirements of light, thin and short electronic products

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