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Optical Imaging Lens

An optical imaging lens and lens technology, applied in the field of imaging lenses, can solve the problems of small lens aperture, low lens pixel, and poor target recognition at long distances, and achieve the effect of small distortion, high imaging quality, and satisfying imaging needs.

Active Publication Date: 2021-06-25
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

[0004] However, most of the small-angle lenses currently on the market generally have shortcomings such as low lens pixels and small lens apertures, which lead to poor recognition of long-distance targets and cannot meet the needs of ADAS.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0096] 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 stop ST , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the filter G1. The first lens L1 and the second lens L2 in front of the stop ST form the first group Q1, the third lens L3 behind the stop ST forms the second group Q2, the fourth lens L4, the fifth lens L5, the sixth lens The lens L6 and the seventh lens L7 form the third group Q3.

[0097] The first lens L1 has negative refractive power, the object side S1 of the first lens is concave, the image side S2 of the first lens is close to a plane, and the first lens L1 is a glass spherical lens.

[0098] The second lens L2 has positive refractive power, the object s...

no. 2 example

[0111] see Figure 4 , shows a structural diagram of an optical imaging lens 200 provided in this embodiment. 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 stop ST of the optical imaging lens 200 in this embodiment is set between the first lens L1 and the second lens L1. Between the lenses L2, the first lens L1 forms the first group Q1, the second lens L2 and the third lens L3 form the second group Q2, the image side S2 of the first lens is convex, and the image side S11 of the sixth lens L6 It is a concave surface, and the radius of curvature and material selection of each lens are different. The relevant parameters of each lens are shown in Table 2-1.

[0112]

[0113]

[0114] The parameters of each lens aspheric surface in this embodiment are shown in Table 2-2.

[0115]

[0116] In this embodiment, the distortion and axial chromatic aberration curves of the...

no. 3 example

[0118] see Figure 7 , shows a structural diagram of an optical lens 300 provided in this embodiment. The optical lens 300 in this embodiment is roughly the same as the optical lens 100 in the first embodiment, the difference is that the stop ST of the optical lens 300 in this embodiment is set between the first lens L1 and the second lens L2 Between, the first lens L1 forms the first group Q1, the second lens L2 and the third lens L3 form the second group Q2, the image side S2 of the first lens is a concave surface, and the curvature radius and material selection of each lens are different, For specific parameters of each lens, see Table 3-1.

[0119]

[0120] The parameters of each lens aspheric surface in this embodiment are shown in Table 3-2.

[0121]

[0122] In this embodiment, its distortion and axial chromatic aberration are respectively as Figure 8 , Figure 9 shown. Depend on Figure 8 It can be seen that the f-θ distortion of the imaging system in this...

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Abstract

The invention provides an optical imaging lens, which comprises in sequence from the object side to the imaging surface along the optical axis: a first lens with negative refractive power, the object side surface is concave; a second lens with positive refractive power, the object side surface It is convex, and the image side is concave or close to a plane; the third lens with positive refractive power, its object side and image side are both convex; the fourth lens with positive refractive power, its object side and image side are both convex; The fifth lens with negative refractive power, its object side and image side are both concave, and the fourth lens and the fifth lens form a cemented lens group; the sixth lens with positive refractive power, its object side is convex; The focal length of the seventh lens, whose object side and image side are both concave; and a diaphragm located between the first lens and the third lens; the focal length of the optical imaging lens is f>12mm. The optical imaging lens can realize long-distance high-definition imaging, and also has the characteristics of large aperture, which can meet the imaging requirements of darker environments.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical imaging lens. Background technique [0002] The Advanced Driver Assistance System (ADAS) mainly uses the camera to identify all-round conditions and road information on the outside of the vehicle, which can assist the driver in judging the road conditions, thereby helping the driver make correct driving behaviors and reduce improper operations caused by visual reasons. It makes the operation of the vehicle more stable, reliable and safe, and reduces the occurrence of accidents to a certain extent. [0003] With the development of automobile intelligence, ADAS has become the standard equipment of automobiles, and cameras play a pivotal role in the application of ADAS. Through front-view, rear-view, surround-view and other cameras, all-round information inside and outside the vehicle can be obtained. In order to meet the needs of applications such as automatic dr...

Claims

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Application Information

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