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Optical imaging lens

An optical imaging lens and lens technology, applied in optics, optical components, instruments, etc., can solve the problem of high cost and achieve the effect of low cost and good imaging quality

Active Publication Date: 2022-07-29
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the security monitoring system, as an important development field of video monitoring, is being more and more widely used in the monitoring of road transportation industry, production, hospitals, airports, libraries and many other public places. However, currently there are few security lenses with large aperture and large target surface on the market, and most of them are all-glass lenses, and their cost is relatively high. Therefore, the current market development needs more and more On the basis of cost reduction, it can achieve high-definition imaging, security lens with large aperture and large target area

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Refer to the following Figure 1 to Figure 2D The optical imaging lens according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0078] like figure 1 As shown, the optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens Lens E6, seventh lens E7 and filter E8.

[0079] The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is concave, and the image side S4 is convex. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object s...

Embodiment 2

[0092] Refer to the following Figures 3 to 4D The optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. image 3 A schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application is shown.

[0093] like image 3 As shown, the optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens Lens E6, seventh lens E7 and filter E8.

[0094] The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is concave, and the image side S4 is convex. The third lens E3 has positive refractive p...

Embodiment 3

[0105] Refer to the following Figures 5 to 6D The optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application is shown.

[0106] like Figure 5 As shown, the optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens Lens E6, seventh lens E7 and filter E8.

[0107] The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is concave, and the image side S4 is convex. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side ...

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Abstract

The present application discloses an optical imaging lens, comprising in sequence from the object side to the image side along an optical axis: a first lens with optical power; a second lens with positive optical power; and a third lens with optical power; a fourth lens with negative power; a fifth lens with power; a sixth lens with positive power; and a seventh lens with power. The material of at least three lenses in the first lens to the fourth lens is plastic. The material of the fifth lens is glass, and the object side surface and the image side surface are spherical surfaces. The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.25.

Description

technical field [0001] The present application relates to the field of optical components, and more particularly, to an optical imaging lens. Background technique [0002] With the development of high-definition video surveillance, from the initial 300,000 pixels to 3 million pixels, the global video surveillance technology is ushering in a technological innovation, and the surveillance lens as the core component of video surveillance has also begun to enter a stage of rapid development. Among them, security monitoring system, as an important development field of video monitoring, is being more and more widely used in the monitoring of many public places such as road traffic industry, production, hospital, airport, library, etc. However, at present, there are few security lenses on the market with both large aperture and large target surface, and most of them are all-glass lenses, and their cost is high. Therefore, the current development of the market requires more and more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 戴付建耿晓婷赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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