A day-and-night confocal zooming monitor lens with a large light-transmission amount

A large-pass light, confocal technology, applied in optics, optical components, instruments, etc., can solve the problem of inability to guarantee, zoom lens does not have large aperture day and night confocal, etc., to achieve the effect of large zoom ratio

Pending Publication Date: 2018-12-07
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the current zoom lens does not have a large aperture and is confocal day and night, and cannot guarantee sufficient light flux to realize all-weather monitoring

Method used

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  • A day-and-night confocal zooming monitor lens with a large light-transmission amount

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 1 As shown, in this example, Figure 1 As shown in the figure, a Datongguang day and night confocal zoom monitoring lens specifically includes a front group of lenses, an aperture diaphragm and a rear group of lenses arranged in sequence from the object side to the image side, wherein the front group of lenses includes a group A lens group and a B group Lens group:

[0037] The A-group lens group includes a first doublet lens in which a first lens with a negative refraction force and a second lens with a positive refraction force are tightly bonded;

[0038] a third lens with positive refractive power;

[0039] The group B lens group includes a fourth lens with a negative refractive force;

[0040] A second doublet lens formed by the fifth lens with negative refraction force and the sixth lens with positive r...

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Abstract

The invention provides a day-and-night confocal zooming monitor lens with a large light-transmission amount. The zooming monitor lens comprises a front group of lenses, an aperture stop and a rear group of lenses which are sequentially arranged from the object side to the image side; the front group of lenses includes, in order from the object side to the image side, a first cemented doublet whichis composed of a first lens having negative refractive power and a second lens having positive refractive power which are closely adhered to each other; a third lens having positive refractive power;a fourth lens having negative refractive power; a second cemented doublet in which a fifth lens having negative refractive power and a sixth lens having positive refractive power are closely adhered;a seventh lens having positive refractive power; a third cemented doublet; a fourth cemented doublet; and a twelfth lens and a fifth cemented doublet with positive refractive power. The day-and-nightconfocal zooming monitor lens with the large light-transmission amount of the invention can realize all-weather monitoring while ensuring an enough light-transmission amount, and has a relatively large zoom ratio.

Description

technical field [0001] The invention relates to a day and night confocal zoom monitoring lens of Datong Light, which belongs to the technical field of photoelectric imaging. Background technique [0002] Nowadays, security monitoring systems are used in various places in life, and higher and higher requirements are put forward for monitoring systems, which need to meet all-weather monitoring, need to have higher resolution and higher definition images, and need to monitor wider scope. For this reason, the existing monitoring lenses can rarely meet all these requirements. Either manual focus is required for day and night monitoring, or the light flux of the lens is too small, so that the imaging effect at night is not ideal, or the fixed focus lens, the observation is clear The scope is limited. In view of these problems, it is necessary to develop a day and night confocal zoom monitoring lens of Datong Light. Contents of the invention [0003] The technical problem to b...

Claims

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Application Information

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IPC IPC(8): G02B15/177
CPCG02B15/177
Inventor 林峰叶文炜何丽鹏
Owner FUJIAN NORMAL UNIV
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