2.8mm day-night confocal lens with high luminous flux

It is a technology of Datong light and lens, which is applied in the direction of optics, optical components, instruments, etc. It can solve the problems of difficult to guarantee field curvature, large volume, complex lens structure, etc., and achieve the effect of improving color distortion and enhancing saturation

Inactive Publication Date: 2018-01-09
FUJIAN FORECAM OPTICS CO LTD
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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 compl...

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  • 2.8mm day-night confocal lens with high luminous flux
  • 2.8mm day-night confocal lens with high luminous flux
  • 2.8mm day-night confocal lens with high luminous flux

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Embodiment Construction

[0017] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.

[0018] refer to Figure 1 to Figure 3

[0019] A 2.8mm Datong light day and night confocal lens, comprising a front group of lenses, a diaphragm C and a rear group of lenses arranged in sequence along the light incident direction, the front group of lenses consists of the first meniscus negative lens A1, double concave The negative lens A2 and the first double-convex positive lens A3 are composed of the film lens group composed of the meniscus positive lens B1, the second double-convex positive lens B2 and the second meniscus negative lens B3 arranged in sequence, and the first Composed of three biconvex positive lenses B4.

[0020] In this embodiment, the air interval between the first meniscus negative lens ...

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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...

Claims

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Application Information

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IPC IPC(8): G02B13/00
Inventor 李俊攀郑秋张荣曜冯科郑育亮
Owner FUJIAN FORECAM OPTICS CO LTD
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