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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, and achieve improved imaging performance, clear imaging, and good thermal stability Effect

Active Publication Date: 2022-02-01
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, 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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  • 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

[0084] see figure 1 , is a schematic structural diagram 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 first group Q1 with negative optical power, and a first group Q1 with positive optical power The second group Q2 with positive power, the third group Q3 with positive power, and the filter G1.

[0085] The first group Q1 includes in order from the object side to the imaging plane along the optical axis: a first lens L1 and a second lens L2. The second group Q2 includes in sequence from the object side to the imaging plane along the optical axis: a third lens L3, a fourth lens L4, and a fifth lens L5. The third group Q3 sequentially includes the sixth lens L6 along the optical axis from the object side to the imaging surface. A stop ST is provided between the first lens L1 and the second lens L2.

[0086] Wherein...

no. 2 example

[0101] Please refer to Figure 5 , the structure of the optical imaging lens 200 in this embodiment is roughly the same as that of the optical imaging lens 100 in the first embodiment, the difference is that: the object side S10 of the sixth lens is a convex surface, and the image side S11 is a concave surface; finally The mechanical back focus between the sixth lens L6 and the imaging surface S14 of a lens is lengthened; and there are differences in the materials of some lenses, the relevant parameters of each lens and the air gap.

[0102] The relevant parameters of each lens of the optical imaging lens 200 provided in this embodiment are shown in Table 3.

[0103] table 3

[0104]

[0105] The surface coefficients of each aspheric surface in the optical imaging lens 200 in this embodiment are shown in Table 4.

[0106] Table 4

[0107]

[0108] The distortion curve diagram, MTF diagram and axial chromatic aberration diagram of the optical imaging lens 200 provided in...

no. 3 example

[0110] Please refer to Figure 9 , the structure of the optical imaging lens 300 in this embodiment is roughly the same as that of the optical imaging lens 100 in the first embodiment, the difference is that the second lens L2 adopts an aspherical lens, and the sixth lens L6 has a negative optical focus There are differences in the relevant parameters and air intervals of the lens, as well as the parameters of each lens of the lens.

[0111] The relevant parameters of each lens of the optical imaging lens 300 provided in this embodiment are shown in Table 5.

[0112] table 5

[0113]

[0114] Table 6 shows the surface coefficients of each aspheric surface of the optical imaging lens 300 in this embodiment.

[0115] Table 6

[0116]

[0117] The distortion curve diagram, MTF diagram and axial chromatic aberration diagram of the optical imaging lens 300 provided in this embodiment are respectively as follows Figure 10 , Figure 11 and Figure 12 shown. Depend on ...

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Abstract

The invention discloses an optical imaging lens and imaging equipment. The optical imaging lens sequentially comprises a first group with negative focal power, a second group with positive focal power and a third group with focal power from an object side to an imaging surface along an optical axis, the first group sequentially comprises a first lens with negative focal power and a second lens with negative focal power from the object side to the imaging surface along the optical axis; the second group sequentially comprises a third lens with positive focal power, a fourth lens with positive focal power and a fifth lens with negative focal power from the object side to the imaging surface along the optical axis, and the fourth lens and the fifth lens form a balsaming lens; and the third group sequentially comprises a sixth lens with focal power from the object side to the imaging surface along the optical axis. The optical imaging 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 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 vehicle. It is required to clearly distinguish obstacles at a long distance and realize collision wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/02G02B13/06G02B13/18G03B30/00
CPCG02B13/0045G02B13/18G02B13/06G02B13/02G02B13/006G03B30/00
Inventor 陈伟建王家贤
Owner 合肥联创光学有限公司
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