CN202615027U

CN202615027U - Dual-waveband zoom lens

Info

Publication number: CN202615027U
Application number: CN 201220124023
Authority: CN
Inventors: 郑志勇
Original assignee: FUZHOU HAOBANG ELECTRONIC TECHNOLOGY CO LTD
Current assignee: FUZHOU HAOBANG ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2012-12-19
Anticipated expiration: 2022-03-29

Abstract

The utility model discloses a visible-light infrared-ray confocal high-resolution dual-waveband zoom lens. The dual-waveband zoom lens is provided with a lens group Gn having negative focal power, a diaphragm and a lens group Gp having positive focal power. The lens group Gn having the negative focal power is provided with a first lens, a second lens and a third lens arranged successively in a side of an object. The first lens is a concave-convex lens. The second lens is a biconcave lens. And the third lens is a concave-convex lens. The lens group Gp having the positive focal power is provided with a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens arranged successively in a side of the object. The fourth lens is a biconvex lens. The fifth lens is concave-convex lens. The sixth lens is a biconvex lens. The seventh lens is a biconcave lens. The eighth lens is a biconvex lens. And the ninth lens is a convex-plane lens. The sixth lens and the seventh lens form a glued assembly. By using the dual-waveband zoom lens provided by the utility model, the monitoring object can be displayed clearly no matter in a condition with daylight visible light illumination or a condition with night infrared ray illumination. And no blurring phenomenon occurs.

Description

The two waveband zoom lens

Technical field

The utility model belongs to the optical, mechanical and electronic integration field, relates to the confocal high resolving power two waveband zoom lens of a kind of visible light and infrared ray.

Background technology

Along with security precautions and automaticity improve constantly, it is important that the monitoring at night more and more seems.Common monitoring camera lens mainly is to be directed against visible light condition design on daytime, and people are as long as can see that under the visible light condition monitored object has just met the demands.Yet,, when requiring night visible light can not be arranged in a lot of monitoring occasions; Generally can only be equipped with the sightless infrared light of human eye; At this moment because common lens is not considered infrared light in design, the imaging to infrared light is not optimized, because infrared light is different with wavelength of visible light; Can squint in the image planes position that they form images, the phenomenon that shows be exactly under the infrared light condition image blur, image quality poor.This camera lens that just requires to use in the system not only will be considered visible light consideration infrared light, and the imaging of two wave bands all is optimized.Simultaneously, people also have higher requirement to the resolution of monitored picture, and visible light and the confocal high resolving power two waveband zoom lens of infrared ray of designing the proper focal length section are the development trends of having complied with monitoring trade, have vast market prospect.

Summary of the invention

The purpose of the utility model be design a kind of visual light imaging and infrared light form images can be confocal the two waveband zoom lens.

For realizing above-mentioned purpose; The two waveband zoom lens of the utility model has the lens combination Gn of a negative power; Diaphragm; With the lens combination Gp that is disposed at negative lens group Gn, utilize the airspace between negative lens group Gn and the positive lens groups Gp to change the zoom of realizing 4-9mm with positive light coke as side.Said negative lens group Gn is contained in the preceding arrangement of mirrors tube that radially is provided with three guide pins; Positive lens groups Gp is contained in the back arrangement of mirrors tube that radially is provided with three guide pins; Preceding arrangement of mirrors tube and back arrangement of mirrors wound packages are in having the main tube of spirality groove; Forward and backward arrangement of mirrors tube passes through guide pin and is connected with main tube, and forward and backward arrangement of mirrors tube can be slided up and down at a main tube inside spin, adjusts cam through the preceding adjustment cam that respectively has three straight troughs of group before and after adjusting respectively with the back; Realize changing the airspace between negative lens group Gn and the positive lens groups Gp, thereby reach the purpose of zoom.

It is that convex-concave eyeglass, second lens are concave-concave eyeglass and the 3rd lens convex-concave eyeglass that negative lens group Gn in the utility model has by tactic first lens of object one side.It is the biconvex eyeglass that positive lens groups Gp has by tactic the 4th lens of object one side, and the 5th lens are the convex-concave eyeglass, and the 6th lens are the biconvex eyeglass, and the 7th lens are the concave-concave eyeglass, and the 8th lens are the biconvex eyeglass, and the 9th lens are protruding flat eyeglass; Wherein, described the 6th lens and the 7th lens are the gummed assembly.

Adopt the two waveband zoom lens of above design can reach following optical index: focal distance f=4-9mm, field angle 2W=54 °-23 °, relative aperture F=1.6; The optical transfer function mtf value is when 120lp/mm, and the center reaches 0.65, and the edge reaches 0.5.

The utility model is through all being optimized imaging two wave bands, makes the imaging resolution of visible light on daytime reach the two waveband zoom lens of 1,500,000 pixels.This camera lens cooperates matched camera, display monitoring target clearly under the visible light condition by day, and the details of display monitoring target to greatest extent; Simultaneously, do not need to regulate in addition the focusing of camera lens, use at night under the condition of infrared illumination, display monitoring target clearly blooming can not occur yet.This lens construction is compact, simple operation, and the utilization prospect is wide.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:

Fig. 1 is the lens assembly structural drawing of the utility model;

Fig. 2 is the optical system synoptic diagram of the utility model.

Embodiment

Like Fig. 1, shown in 2; The two waveband zoom lens of the utility model has the lens combination Gn 1 of a negative power; Diaphragm; With the lens combination Gp with positive light coke 2 that is disposed at negative lens group Gn 1, utilize the airspace between negative lens group Gn 1 and the positive lens groups Gp 2 to change the zoom of realizing 4-9mm as side.Said negative lens group Gn 1 is contained in the preceding arrangement of mirrors tube 3 that radially is provided with three guide pins; Positive lens groups Gp 2 is contained in the back arrangement of mirrors tube 4 that radially is provided with three guide pins; Preceding arrangement of mirrors tube 3 is contained in the main tube 5 of spirality groove with back arrangement of mirrors tube 4; Forward and backward arrangement of mirrors tube passes through guide pin and is connected with main tube 5, and forward and backward arrangement of mirrors tube can be slided up and down at main tube 5 inside spins, adjusts cam through the preceding adjustment cam that respectively has three straight troughs of group before and after adjusting respectively with the back; Realize changing the airspace between negative lens group Gn and the positive lens groups Gp, thereby reach the purpose of zoom.

It is concave-concave eyeglass and the 3rd lens 13 convex-concave eyeglasses for convex-concave eyeglass, second lens 12 that negative lens group Gn in the utility model has by tactic first lens 11 of object one side.It is the biconvex eyeglass that positive lens groups Gp in the utility model has by tactic the 4th lens 21 of object one side; The 5th lens 22 are the convex-concave eyeglass; The 6th lens 23 are the biconvex eyeglass, and the 7th lens 24 are the concave-concave eyeglass, and the 8th lens 25 are the biconvex eyeglass; The 9th lens 26 are protruding flat eyeglass, and described the 6th lens 23 and the 7th lens 24 are the gummed assembly.

Claims

1. a two waveband zoom lens is characterized in that: the lens combination Gp with positive light coke as side that it comprises lens combination Gn, the diaphragm of negative power and is disposed at negative lens group Gn; It is that convex-concave eyeglass, second lens are concave-concave eyeglass and the 3rd lens convex-concave eyeglass that described negative lens group Gn has by tactic first lens of object one side; It is the biconvex eyeglass that positive lens groups Gp has by tactic the 4th lens of object one side, and the 5th lens are the convex-concave eyeglass, and the 6th lens are the biconvex eyeglass; The 7th lens are the concave-concave eyeglass; The 8th lens are the biconvex eyeglass, and the 9th lens are protruding flat eyeglass, and described the 6th lens and the 7th lens are the gummed assembly.

2. two waveband zoom lens according to claim 1 is characterized in that: said negative lens group Gn is contained in the preceding arrangement of mirrors tube that radially is provided with three guide pins, and positive lens groups Gp is contained in the back arrangement of mirrors tube that radially is provided with three guide pins; Before arrangement of mirrors tube and back arrangement of mirrors wound packages in the main tube of spirality groove is arranged, preceding arrangement of mirrors tube is connected with main tube through guide pin with back arrangement of mirrors tube and slides up and down at master's inside spin.