Eight-lens-sheet wide-angle camera lens unit

Abstract

Disclosed in the invention is an eight-lens-sheet wide-angle camera lens unit comprising a lens barrel, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The lenses are arranged coaxially successively in the lens barrel from the object space to the image space; the first lens, the second lens, the third lens, and fifth lens are spherical lenses with negative powers; and the fourth lens, the sixth lens, the seventh lens, and the eighth lens are spherical lenses with positive powers. Because all lenses with specific curvature radiuses and thicknesses are arranged at specific intervals, the visual angle theta of the lens unit is large and can reach 190 degrees, the aperture can reach 1.8 and the resolution is high, so that the requirement of the high-definition quality can be met and the larger visual angle can be realized. Therefore, the camera lens unit is suitable for large-range monitoring and especially suitable for a high-definition light-sensitive product having the resolution with a 16-megapixel chip, wherein the product can be a movement DV, a household security and protection unit, or an automobile data recorder and the like.

Description

technical field [0001] The invention relates to the technology in the field of optical lenses, in particular to an eight-lens ultra-wide-angle lens. Background technique [0002] In recent years, as the application range of camera lenses has become more and more extensive, for example, sports DV, mobile phone cameras, vehicle lenses, security image monitoring and electronic entertainment and other industries, but the existing surveillance and vehicle lenses generally have such Disadvantages: The angle of view is not large enough, the aperture is small, and the overall size is large. When used for monitoring and vehicle use, it appears to be bulky and takes up a lot of space. It is not suitable for sports shooting. [0003] At present, with a lens with a total optical length of less than 36mm on a high-definition chip that is more than one-third of an inch, its viewing angle is often less than 140 degrees, and the overall range of the captured image is so small that it is nec...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies existing in the prior art, and its main purpose is to provide an eight-lens ultra-wide-angle lens, which solves the problem that existing optical lenses cannot achieve small ultra-wide-angle at the same time

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