Low-sensitivity high- resolution slim camera

Abstract

The invention discloses a low- sensitivity high-resolution slim camera which comprises five groups of lenses and conforms to the following formula: -1.2<=F5 / F<=-0.5, wherein F represents the focus of a whole system, and F5 represents the focus of the fifth lens. On the basis of conformance with the formula, the camera can be made slimmer, and the sensitivity of the fifth lens can be reduced. vG1>=50, vG2<=30, wherein vG1 represents the Abbe number of the first lens E1, and vG2 represents the Abbe number of the second lens. The magnification chromatic aberration is corrected, and the resolution is enhanced. F1 / F<=0.75, wherein F represents the focus of the whole system, and F1 represents the focus of the first lens; F2 / F1<=-1, wherein F2 represents the focus of the second lens, and F 1 represents the focus of the first lens; -1.2<=G1R1 / G1R2<=-0.25, wherein G1R1 represents the curvature radius of one side of the first lens, which is towards an object, and the G2R2 represents the curvature radius of the side of the first lens, which is towards an image. The conformance with the three formulas can reduce the sensitivity of the first and the second lenses.

Description

technical field [0001] The invention relates to an imaging optical system of a lens, in particular to a thin lens with low sensitivity and high resolution composed of five groups of lenses. Background technique [0002] With the development of CMOS chip technology, the pixel size of the chip is getting smaller and smaller, and the imaging quality requirements of the matching optical system are getting higher and higher, and the size of the optical lens of the mobile phone or digital camera is getting smaller and smaller; generally Due to the small size and the relatively small number of lenses, the thin lens cannot meet the high-quality analysis requirements. This will inevitably increase the number of lenses, and at the same time make the lens size relatively large, so there is a contradiction. The invention patent with the publication number "CN101046542", the publication date "2007.10.03", and the name "camera lens" proposes an optical imaging system composed of five grou...

AI Technical Summary

Problems solved by technology

Although this system solves the contradiction between resolution and lens size, and meets the requirements of high-resolution thinness, there are still some unsatisfactory aspects: the shape of the fifth lens determines that the lens size cannot be made smaller. It is also difficult to make the focal length longer; the wavy lenses of the fourth lens and the fifth lens are not conducive to processing; a better balance cannot be achieved between the power distribution and the decentering tolerance between the lenses of each group, so there are still some Disadvantages in design and difficulty in processing

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