2.8mm day-night confocal lens with high luminous flux

Abstract

The invention relates to a 2.8mm day-night confocal lens with a high luminous flux. The 2.8mm day-night confocal lens comprises a front group of lenses, a diaphragm, and a rear group of lenses which are successively arranged along a light incident direction. The front group of lenses comprises a first meniscus negative lens, a biconcave negative lens and a first biconvex positive lens which are arranged successively. The rear group of lenses comprises a cemented lens group consisting of a meniscus positive lens, a second biconvex positive lens, and a second meniscus negative lens which are arranged successively, and a third biconvex positive lens. The 2.8mm day-night confocal lens has a large application range and high resolution.

Description

technical field [0001] The invention relates to a 2.8mm Datong light day and night confocal lens. Background technique [0002] After years of development in the security lens market, more and more occasions need to be equipped with higher-definition lenses to meet their monitoring function requirements. Early lenses with lower pixels lack the ability to distinguish object details in some areas, and some of them have good image quality. The complex lens structure and large volume limit its applicability. Some lenses blindly pursue high-definition, and underestimate the resolution capabilities of the lens for different environments and different spectra. At the same time, it is difficult to ensure that they have small field curvature, high definition, high illumination, and large angle of view at the same time. Contents of the invention [0003] The purpose of the present invention is to provide a 2.8mm Datong light day and night confocal lens, which not only has a wider a...

AI Technical Summary

Problems solved by technology

[0002] After years of development in the security lens market, more and more occasions need to be equipped with higher-definition lenses to meet their monitoring function requirements. Early lenses with lower pixels lack the ability to distinguish object details in some areas, and some of them have good image quality. The structure of the lens is complex and the volume is large, which limits its applicability

Some lenses blindly pursue high-definition, and underestimate the resolution capabilities of the lens for different environments and different spectra. At the same time, it is difficult to ensure that they have the performance of small field curvature, high definition, high illumination, and wide angle.

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