Ultra high definition telephoto lens

Abstract

The invention relates to the technical field of optical imaging, in particular to an ultra high definition telephoto lens. The lens includes a first lens, a second lens, a third lens, a forth lens, afifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens from an object side to an image side; by reasonably defining the power of eachlens, the aberration of the telephoto lens is improved, and the effect of shooting is improved. The lens has the advantages of ultra high resolution, large light quantity, small volume and strong resistance to environmental temperature changes so as to overcome the deficiencies in the prior art.

Description

technical field [0001] The invention relates to the technical field of optical imaging, and more specifically, it relates to an ultra-high-definition telephoto lens. Background technique [0002] At present, the optical telephoto lenses used for machine vision generally have such shortcomings: short focal length, low resolution of object details, low system definition, insufficient light flux, telephoto lenses will appear in normal temperature focusing conditions, high and low temperature will appear virtual focus, The situation of enlightenment; at present, for high-definition lenses with long focal lengths, they are generally replaced with civilian SLR telephoto lenses. This type of lens is designed with a large target area, and the resolution of the imaging device with a small target area will be greatly reduced. Moreover, several glass aspherical surfaces are used, which is expensive. At present, there is no lens that fully takes into account the above characteristics in...

AI Technical Summary

Problems solved by technology

[0002] At present, the optical telephoto lenses used for machine vision generally have such shortcomings: short focal length, low resolution of object details, low system definition, insufficient light flux, telephoto lenses will appear in normal temperature focusing conditions, high and low temperature will appear virtual focus, The situation of enlightenment; currently, for high-definition lenses with long focal lengths, civilian SLR telephoto lenses are generally used instead

This type of lens is designed with a large target area, and the resolution of the imaging device with a small target area will be greatly reduced. Moreover, several glass aspherical surfaces are used, which is expensive. At present, there is no lens that fully takes into account the above characteristics in the market. To improve a certain aspect, such as using an aspheric surface to increase investment costs in order to achieve ultra-high definition and small volume, or sacrificing the amount of light to make the brightness of the measured object insufficient; therefore, it is necessary to design an ultra-high-definition, large amount of light. , and high and low temperature confocal all-glass structure telephoto lens, specially used for capturing the details of objects

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