High-resolving force optical zoom lens with large target surface

Abstract

The invention relates to a high-resolving force optical zoom lens with a large target surface, and belongs to the field of optical and mechanical integration. The high-resolving force optical zoom lens with the large target surface sequentially comprises a first lens group G1 with negative power, a diaphragm and a second lens group G2 with positive power from an object side to an image side. The focal length of the lens is charged through moving the second lens group G2, and the change of the position of the zoomed image surface is compensated through moving the first lens group G1 to ensure that the position of the inner image surface within the whole zooming range is unchangeable. The target surface of the optical zoom lens is 1 / 2 cun, wherein the cun is a unit of length. In the whole focal length section, values of an optical modulation transfer function (MTF) of the lens are all more than 0.3 at a place of 1301p / mm, which ensures that the resolving force can realize high definition corresponding to mega pixel within the whole focal length section, thereby adapting to the development tendency of a security industry, and having wide market prospects.

Description

technical field [0001] This patent belongs to the field of optical-mechanical integration, and relates to an optical zoom lens, especially an optical zoom lens with a large target surface and high resolution. Background technique [0002] With the development of the security industry, people have higher and higher requirements for video surveillance. The image quality of traditional standard definition can no longer meet the market demand. In recent years, the security surveillance market has gradually developed to high-definition. In this context, many foreign CMOS chip manufacturers and scientific research institutions have invested a lot of energy to continuously improve and perfect the production process of CMOS chips, and launched a series of large target surfaces such as 1 / 2.7 inch, 1 / 2.5 inch, and 1 / 2 inch. The high-pixel CMOS chip has greatly increased the demand for large target area and high-resolution surveillance lenses in the security market. Through optical de...

AI Technical Summary

Problems solved by technology

[0002] With the development of the security industry, people's requirements for video surveillance are getting higher and higher, and the image quality of traditional standard definition can no longer meet the market demand. In recent years, the security monitoring market has gradually developed to high-definition

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