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Optical imaging lens and imaging equipment

An optical imaging lens and imaging surface technology, applied in the field of imaging lens, can solve problems such as difficult to meet the requirements of the preview distance, reduce the target recognition range, and poor imaging effect, so as to improve resolution capability, correct aberration, and good thermal The effect of stability

Active Publication Date: 2021-07-23
合肥联创光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, vehicle-mounted lenses used for target recognition in front of vehicles are often designed for short-distance targets, and their field of view is relatively large. Although this type of lens can better image short-distance targets, 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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  • 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

[0086] see figure 1 , which is a schematic structural view of the optical imaging lens 100 provided by 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 first lens L1, a second lens L2, and a third lens L3, stop ST, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter G1.

[0087] The first lens L1 has positive refractive power, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface.

[0088] The second lens L2 has negative refractive power, and both the object side S3 and the image side S4 of the second lens are concave.

[0089] The third lens L3 has positive refractive power, the object side S5 of the third lens is a convex surface, and the image side S6 of the third lens is a concave surface.

[0090] The fourth lens L4 has positive refractive power, and both the object side S...

no. 2 example

[0105] see Figure 5 , is a schematic structural diagram of the optical imaging lens 200 provided by the second embodiment of the present invention. The optical imaging lens 200 in this embodiment is roughly the same as the optical imaging lens 100 in the first embodiment, the difference is that the distance between the third lens L3 and the fourth lens L4 of the optical imaging lens 200 in this embodiment is relatively small. Near, and the radius of curvature and material selection of each lens are different.

[0106] Table 3 shows relevant parameters of each lens of the optical imaging lens 200 provided in this embodiment.

[0107] table 3

[0108]

[0109] The parameters of each lens aspheric surface of the optical imaging lens 200 in this embodiment are shown in Table 4.

[0110] Table 4

[0111]

[0112] see Image 6 , shows the F-tanθ distortion diagram of the optical imaging lens 200 provided by the second embodiment of the present invention. It can be seen f...

no. 3 example

[0116] see Figure 9 , shows a structural diagram of an optical imaging lens 300 provided in this embodiment. The optical imaging lens 300 in this embodiment is roughly the same as the optical imaging lens 100 in the first embodiment, the difference is that the image side of the third lens L3 of the optical imaging lens 300 in this embodiment is a convex surface, and each The radius of curvature of the lens and the choice of material are different.

[0117] The relevant parameters of each lens of the optical imaging lens 300 provided in this embodiment are shown in Table 5.

[0118] table 5

[0119]

[0120] The parameters of each lens aspheric surface of the optical imaging lens 300 of this embodiment are shown in Table 6.

[0121] Table 6

[0122]

[0123] see Figure 10 , shows the F-tanθ distortion diagram of the optical imaging lens 300 provided by the third embodiment of the present invention. It can be seen from the figure that the F-tanθ distortion of the le...

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Abstract

The invention discloses an optical imaging lens and imaging equipment, and the optical imaging lens is composed of seven lenses which sequentially comprise from an object side to an imaging surface along an optical axis: a first lens with positive focal power, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens with negative focal power, wherein the object side surface and the image side surface of the second lens are concave surfaces; a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface; a diaphragm; 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 positive focal power, wherein the object side surface and the image side surface of the fifth lens are convex surfaces; a sixth lens with negative focal power, wherein the object side surface and the image side surface of the sixth lens are concave surfaces; and a seventh lens with positive focal power, wherein the object side surface of the seventh lens is a convex surface, the image side surface of the seventh lens is a concave surface, and the seven lenses are all glass lenses. The optical imaging lens has the advantages of high pixel, long focal length and small distortion.

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 development of autonomous driving technology, ADAS (Advanced Driver Assistant System, Advanced Driver Assistance System) has become the standard configuration of many cars; among them, the on-board camera lens, as a 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 departure warning, and pedestrian detection directly affects the safety factor of ADAS. Therefore, the performance requirements of on-board camera lenses are getting higher and higher. [0003] The optical lens installed in ADAS and applied to the front of the vehicle is mainly to identify the situation in front of the car. It is required to clearly distinguish obstacles from 100 meters away and realize collision warn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B1/00G03B30/00
CPCG02B13/0045G02B13/18G02B1/00
Inventor 王昆魏文哲王克民曾吉勇
Owner 合肥联创光学有限公司
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