Ultra high definition wide-angle zooming optical system

Abstract

The invention discloses an Ultra high definition (UHD) wide-angle zooming optical system which comprises an image sensor. A first lens group and a second lens group are sequentially arranged on one side of the image sensor from the object side to the image side, and a fixing diaphragm is arranged between the first lens group and the second lens group, wherein the first lens group has negative focal power and can move along the optical axis direction, and the second lens group has positive focal power and can move along the optical axis direction. The focal length f1 of the first lens group and a focal length f2 of the second lens group satisfy the relationship of 0.75<|f1 / f2|<1.25. The axial movement of the first lens group and the second lens group realize zooming from 105-degree horizontal wide angle to 37-degree horizontal long focal length. The UHD wide-angle zooming optical system has a small size and wide view angle, satisfies use requirements of different monitoring scenes, and reaches high resolution of 12 mega-pixel. The UHD wide-angle zooming optical system is widely applicable to the field of optical equipment.

Description

technical field [0001] The invention relates to the field of optical equipment, in particular to an ultra-high-definition wide-angle zoom optical system. Background technique [0002] With the development of security terminals towards ultra-high-definition (4K), miniaturization, zoom and wide-angle, ultra-high-definition wide-angle zoom lenses have been used more and more. In order for the security terminal to realize the above monitoring functions, the matching wide-angle zoom lens is required to have high definition, ultra-wide angle, large diameter, can be used day and night, and small in size. The difficulty of the zoom optical system is to achieve ultra-wide-angle zoom and full HD image quality under the premise of controlling the volume of the optical system. At present, the zoom optical system of the security terminal can mostly monitor the horizontal wide-angle within 90 degrees, and it is difficult to reach 100 degrees. The wide-angle field of view is small, and it...

AI Technical Summary

Problems solved by technology

At present, the zoom optical system of the security terminal can mostly monitor the horizontal wide-angle within 90 degrees, and it is difficult to reach 100 degrees. The wide-angle field of view is small, and it is difficult to meet the requirements of different monitoring scenarios; and most of its pixels are below 6 million pixels. , it is difficult to reach 12 million pixels, and it is difficult to meet some occasions that require ultra-high-definition resolution monitoring systems, such as squares, stations, ports and other crowded places.

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