High Pixel Thin Lens

Abstract

The invention provides a high-resolution thin lens unit comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a diaphragm sequentially from objective side to image side. The objective side of the first lens having a positive refractive power is a convex side. The image side of the second lens having a negative refractive power is a concave side. The image side of the third lens having a positive refractive power is a convex side. The image side of the fourth lens having a positive refractive power is a convex side. The objective side and image side of the fifth lens having a negative refractive power are both convex sides; at least one of the objective side and the image side has at least one inflection point. The diaphragm is arranged between an object and the second lens. The high-resolution thin lens unit meets -5.0<f45 / f<-3.5, 12<(T34 / TTL)*100<16.5; wherein f45 is a combine focus of the third and fourth lenses, f is an overall focus of an optical system; T34 is an axial distance between the third and fourth lenses, and TTL is overall length of the lenses. The high-resolution thin lens unit has the advantages that overall length of the optical system is decreased, distortion correction and ghost image inhibition are achieved on the premise of large visual angle, high resolution and large aperture guaranteed, and system imaging quality is improved.

Description

technical field [0001] The invention relates to a high-pixel thin lens, which is a miniature imaging lens system composed of five groups of lenses. Background technique [0002] At present, 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, but the size of the optical lens of the mobile phone or digital camera is getting smaller and smaller; Due to the small size and the relatively small number of lenses, ordinary thin lenses cannot meet the high-quality analysis requirements. This will inevitably increase the number of lenses, and at the same time increase the total optical length of the lens, which is difficult to achieve the characteristics of miniaturization. The invention patent with the publication number "US20110310287" and the name "photographic optical system and image capture device" proposes an optical imaging sys...

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