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Optical imaging lens and imaging equipment

An optical imaging lens and imaging surface technology, applied in the field of imaging lenses, can solve the problems of poor long-distance imaging, poor recognition of long-distance targets, and unclear imaging at the edge of the field of view.

Active Publication Date: 2021-08-20
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing optical lenses on the market generally have disadvantages such as poor long-distance imaging and unclear peripheral field of view imaging, which leads to poor recognition of long-distance targets and cannot meet the needs of vehicle monitoring systems.

Method used

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  • Optical imaging lens and imaging equipment
  • Optical imaging lens and imaging equipment
  • Optical imaging lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0078] see figure 1 , which is a schematic structural view of the optical imaging lens 100 provided in the first embodiment of the present invention, the optical imaging lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a stop ST, a first lens L1, a second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter G1, and cover glass G2.

[0079] The first lens L1 has negative refractive power, the object side S1 of the first lens is concave, and the image side S2 of the first lens is convex;

[0080] The second lens L2 has positive refractive power, the object side S3 of the second lens is concave, and the image side S4 of the second lens is convex;

[0081] The third lens L3 has a positive refractive power, and both the object side S5 and the image side S6 of the third lens are convex;

[0082] The fourth lens L4 has a positive refractive power, and both the object side S7 and the image side...

no. 2 example

[0098] see Figure 5 , the structural schematic diagram of the optical imaging lens 200 provided by the second embodiment of the present invention, the optical imaging lens 200 of this embodiment is substantially the same as the above-mentioned first embodiment, the main difference is that the object side S3 of the second lens is a plane, And parameters such as radius of curvature, thickness, and refractive index of each lens are different.

[0099] Specifically, parameters related to each lens of the optical imaging lens 200 provided in this embodiment are shown in Table 3.

[0100] table 3

[0101]

[0102] The surface coefficients of each aspheric surface in the optical imaging lens 200 in this embodiment are shown in Table 4.

[0103] Table 4

[0104]

[0105] The MTF diagram, the vertical axis chromatic aberration diagram and the relative illuminance diagram of the optical imaging lens 200 provided in this embodiment are respectively as follows Figure 6 , Fig...

no. 3 example

[0110] see Figure 9, a schematic diagram of the structure of the optical imaging lens 300 provided by the third embodiment of the present invention. The optical imaging lens 300 of this embodiment is substantially the same as that of the above-mentioned first embodiment, the main difference is that the object side surface S3 of the second lens is a convex surface, And parameters such as radius of curvature, thickness, and refractive index of each lens are different. Specifically, parameters related to each lens of the optical imaging lens 300 provided in this embodiment are shown in Table 5.

[0111] table 5

[0112]

[0113] The surface coefficients of each aspheric surface in the optical imaging lens 300 in this embodiment are shown in Table 6.

[0114] Table 6

[0115]

[0116] The MTF diagram, the vertical axis chromatic aberration diagram and the relative illuminance diagram of the optical imaging lens 300 provided in this embodiment are respectively as follows ...

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Abstract

The invention discloses an optical imaging lens and an imaging device. The optical imaging lens sequentially comprises from an object side to an imaging surface along an optical axis: a diaphragm; a first lens with negative power, wherein the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a convex surface; a second lens with positive focal power, wherein the image side surface of the second lens is a convex surface; a third lens with positive focal power, wherein the object side surface and the image side surface of the third lens are convex surfaces; a fourth lens with positive focal power, wherein the object side surface and the image side surface of the fourth lens are convex surfaces; a fifth lens with negative focal power, wherein the object side surface and the image side surface of the fifth lens are concave surfaces, and the fourth lens and the fifth lens are glued into a bonded body; a sixth lens with positive focal power; and a seventh lens with negative focal power, wherein the object side surface of the seventh lens is a convex surface near the optical axis, and the image side surface of the seventh lens is a concave surface near the optical axis. The optical imaging lens has the advantages of large aperture, high relative illumination, high resolution and high imaging quality.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical imaging lens and imaging equipment. Background technique [0002] With the vigorous development of the automobile industry, automation and in-vehicle monitoring have begun to develop rapidly. As a key component of the automatic driving assistance system, the on-board camera has also ushered in rapid development. Through the front-view, rear-view, surround-view and other on-board cameras, it can Obtain all-round information inside and outside the vehicle to help the driver make correct driving behaviors. Therefore, the adaptability of the lens to the environment and imaging stability become the safety guarantee during the driving of the car. Vehicle lenses not only need to be used in various environments such as high and low temperature conditions, acid and alkali erosion conditions, but also need to be used in low-light and dark conditions. In these occasions, t...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G03B30/00
CPCG02B13/0045G02B13/006G02B13/18
Inventor 廖宝发魏文哲王昆王克民曾吉勇
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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