High-resolution zoom lens

A zoom lens and high-resolution technology, which is applied in the field of high-resolution zoom lenses, can solve the problem that it is difficult to achieve high-definition image quality at the same time in different focal lengths, it cannot adapt to sensors with large image areas and high pixels, and it is difficult to improve the resolution, etc. problem, to achieve the effect of light weight, bright and clean picture, and good low-light effect

Pending Publication Date: 2020-07-10
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still many deficiencies in the zoom lenses used for security monitoring in the market, such as small light transmission, and the general FNO value is between 1.6 and 2.8, which cannot meet the needs of low light, especially in low light environments, which will cause the monitoring screen to be dark. , the video has a lot of noise; if you want to achieve Datong light, it is difficult to improve the resolution, the image quality is poor, and it is difficult to achieve high-definition image quality at different focal lengths at the same time; the image area is relatively small, and it cannot be adapted to a sensor with a large image area and high pixels; The volume is large, the lens is relatively large, relatively bulky, etc., which can no longer meet the increasing requirements of users and need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Such as figure 1 and 2 As shown, the present invention provides a high-resolution zoom lens, which sequentially includes a first lens 1, a second lens 2, a third lens 3, a diaphragm 120, The fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 100, the eleventh lens 110, the protective glass 130 and the imaging surface 140; Each of the first lens 1 to the eleventh lens 110 includes an object side facing the object side A1 for passing the imaging light and an image side facing the image side A2 for passing the imaging light.

[0062] The first lens 1 has a negative refractive power, the object side 11 of the first lens 1 is a convex surface, and the image side 12 of the first lens 1 is a concave surface; the second lens 2 has a negative refractive power, and the object side 21 of the second lens 2 It is a concave surface, and the image side 22 of the second lens 2 is a concave surface; the third lens...

Embodiment 2

[0089]The concave-convex surface shape and refractive power of each lens in this embodiment are substantially the same as those in Embodiment 1. Only the object side surface 11 of the first lens 1 is a concave surface, and the object side surface 71 of the seventh lens 7 is a convex surface. In addition, each lens surface Optical parameters such as radius of curvature and lens thickness are also different.

[0090] The detailed optical data of this specific embodiment at the shortest focal length is shown in Table 2-1.

[0091] Detailed optical data at the shortest focal length of the second embodiment of Table 2-1

[0092]

[0093] Please refer to the following table for the detailed data of the parameters of each aspheric surface in this specific embodiment:

[0094] surface K＝ a 4 ＝

a 6 ＝

a 8 ＝

a 10 ＝

a 12 ＝

41 -2.53 -5.67E-05 -2.18E-06 -1.05E-08 -7.19E-10 7.84E-14 42 1.21 -1.54E-05 -1.85E-06 -6.64E-09 -4.83E-10 4.46E-13 ...

Embodiment 3

[0099] The concave-convex surface and refractive index of each lens in this embodiment are approximately the same as those in Embodiment 1. Only the object side 11 of the first lens 1 is a plane, and the image side 32 of the third lens 3 is a plane. In addition, each lens surface Optical parameters such as radius of curvature and lens thickness are also different.

[0100] The detailed optical data of this specific embodiment at the shortest focal length is shown in Table 3-1.

[0101] Detailed optical data at the shortest focal length of the third embodiment of Table 3-1

[0102]

[0103] Please refer to the following table for the detailed data of the parameters of each aspheric surface in this specific embodiment:

[0104]

[0105]

[0106] Please refer to Table 5 for the values ​​of the relevant conditional expressions in this specific embodiment.

[0107] For the resolution of this specific embodiment, please refer to Figure 13 to Figure 15 , it can be seen f...

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Abstract

The invention relates to the technical field of lenses. The invention discloses a high-resolution zoom lens. The high-resolution zoom lens comprises eleven lenses, the first lens, the second lens andthe third lens form a focusing lens group. The fourth lens to the eleventh lens form a zoom lens group. A diaphragm is arranged between the focusing lens group and the zoom lens group and is used forcorrespondingly limiting the refractive indexes and the surface types of the first lens to the eleventh lens, the fourth lens is an aspheric lens, the zoom lens is provided with at least three groupsof cemented lenses, and each cemented lens is formed by mutually cementing two lenses from the first lens to the eleventh lens. The LED lamp has advantages of high light transmittance, high resolution, a large image plane; good day-night confocal property, small size and high portability.

Description

technical field [0001] The invention belongs to the field of lens technology, in particular to a high-resolution zoom lens. Background technique [0002] With the continuous advancement of science and technology and the continuous development of society, optical imaging lenses have also developed rapidly in recent years. Optical imaging lenses are widely used in smart phones, tablet computers, video conferencing, vehicle monitoring, security monitoring, unmanned Aerial photography and other fields. [0003] A zoom lens is a camera lens that can change the focal length within a certain range to obtain different wide and narrow field of view angles, images of different sizes and different scene ranges. The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is very convenient to use and is being used more and more widely. [0004] However, there are still many deficiencies in the zoom lenses used for security mon...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/14
CPCG02B13/0045G02B13/006G02B13/008G02B13/009
Inventor 上官秋和刘青天李雪慧
Owner XIAMEN LEADING OPTICS
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