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Optical lens

An optical lens and lens technology, applied in the field of optical lens, can solve problems such as difficult to meet the requirements of preview distance, poor imaging effect, large field of view, etc., and achieve the goal of improving imaging quality, recognition accuracy, and high-definition imaging effect Effect

Active Publication Date: 2022-07-01
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the optical lens used for target recognition in front of the vehicle is often designed for short-distance targets, and its field of view is relatively large. Although this type of lens can image short-distance targets well, it cannot image distant targets. The effect is poor, and the recognition accuracy of medium and long-distance targets cannot be taken into account, which reduces the effective target recognition range and is difficult to meet the requirements of the front preview distance for cars driving at high speeds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] see figure 1 , which is a schematic structural diagram of the optical lens provided in Embodiment 1 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a diaphragm ST, a second lens L2, and a third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter G1 and protective glass G2.

[0097] The first lens L1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex;

[0098] aperture ST;

[0099] The second lens L2 has a positive refractive power, and both the object side S3 and the image side S4 are convex;

[0100] The third lens L3 has negative refractive power, the object side S5 is concave, and the image side S6 is convex;

[0101] The fourth lens L4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave;

[0102] The fifth lens L5 has a positive refractive power, and both the object side...

Embodiment 2

[0122] see Figure 8 , which is a schematic structural diagram of the optical lens provided in Embodiment 2 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a diaphragm ST, a second lens L2, a third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter G1 and protective glass G2.

[0123] The first lens L1 has a positive refractive power, the object side S1 is concave, and the image side S2 is convex;

[0124] aperture ST;

[0125] The second lens L2 has a positive refractive power, and both the object side S3 and the image side S4 are convex;

[0126] The third lens L3 has negative refractive power, the object side S5 is concave, and the image side S6 is convex;

[0127] The fourth lens L4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave;

[0128] The fifth lens L5 has a positive refractive power, and both the object side ...

Embodiment 3

[0145] see Figure 15 , which is a schematic structural diagram of the optical lens provided in Embodiment 3 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a diaphragm ST, a second lens L2, and a third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter G1 and protective glass G2.

[0146] The first lens L1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex;

[0147] aperture ST;

[0148] The second lens L2 has positive refractive power, and its object side surface S3 and image side surface S4 are convex surfaces;

[0149] The third lens L3 has negative refractive power, the object side S5 is concave, and the image side S6 is convex;

[0150] The fourth lens L4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave;

[0151] The fifth lens L5 has a positive refractive power, and both...

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Abstract

The invention provides an optical lens, which comprises six lenses in sequence from an object side to an imaging surface along an optical axis: a first lens with focal power, a second lens with focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with focal power and a sixth lens with focal power, a diaphragm; the object side surface and the image side surface of the second lens are convex surfaces; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface; the effective focal length f of the optical lens and the focal length f1 of the first lens meet the condition that f1 / f is less than 4.5. The optical lens has the advantages of large aperture, long focal length and small aperture, can provide a high-definition imaging effect, and can improve the imaging quality and recognition accuracy of a long-distance target.

Description

technical field [0001] The present invention relates to the technical field of imaging lenses, in particular to an optical lens. Background technique [0002] With the development of autonomous driving technology, ADAS (Advanced Driver Assistant System) has become the standard configuration of many cars; among them, the on-board camera lens, as the key component of ADAS, can sense the road conditions around the vehicle in real time and realize the The performance of functions such as collision warning, lane deviation warning and pedestrian detection directly affects the safety factor of ADAS. Therefore, the performance requirements for vehicle camera lenses are getting higher and higher. [0003] The optical lens applied to the front of the vehicle carried in ADAS is mainly to identify the situation in front of the vehicle, and it is required to clearly distinguish obstacles at a long distance to realize collision warning. At present, optical lenses used for target recognit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18
CPCG02B13/0045
Inventor 王昆吴愉魏文哲王克民
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD