CN113109922A - Large-aperture high-definition vehicle-mounted lens for target identification - Google Patents
Large-aperture high-definition vehicle-mounted lens for target identification Download PDFInfo
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Abstract
The invention discloses a large-aperture high-definition vehicle-mounted lens for target identification, which sequentially comprises a positive focal power front lens group A01, an aperture STOP STOP, a positive focal power rear lens group A02, an optical filter and an image surface from an object space to an image space; the positive focal power front lens group A01 consists of a negative focal power first lens L1, a negative focal power second lens L2, a positive focal power third lens L3 and a positive focal power fourth lens L4, wherein the negative focal power first lens L1 is a meniscus lens, the negative focal power second lens L2 is a biconcave lens, the positive focal power third lens L3 is a meniscus lens, and the positive focal power fourth lens L4 is a meniscus lens; the positive focal power rear lens group A02 is composed of a positive focal power fifth lens L5, a negative focal power sixth lens L6 and a positive focal power seventh lens L7, and the positive focal power fifth lens L5 is a biconvex lens. Compared with the prior art, the method has stronger capacity of identifying the low-illumination target and can meet the requirement of identifying the target.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a large-aperture high-definition vehicle-mounted lens for target identification.
Background
In recent years, automobile intellectualization and automation also become a research hotspot for the development of the automobile industry, and auxiliary driving and automatic driving become the future research directions of many enterprises. And the intelligent automobile is required to realize auxiliary driving and automatic driving and is indispensable based on a large-aperture and high-definition vehicle-mounted lens target identification system.
At present, the pixel resolution ratio of common vehicle-mounted lenses in the market is low, the aperture is small, the low-illumination target identification capability of the lenses is poor, and the target identification requirement cannot be met.
Disclosure of Invention
In order to solve the technical defects, the invention aims to provide a large-aperture high-definition vehicle-mounted lens for target identification, which has strong capability of identifying a low-illumination target and can meet the requirement of identifying the target.
In order to achieve the purpose, the invention adopts the technical scheme that: a large-aperture high-definition vehicle-mounted lens for target identification sequentially comprises a front positive focal power lens group A01, an aperture STOP STOP, a rear positive focal power lens group A02, an optical filter and an image surface from an object space to an image space;
the positive focal power front lens group A01 consists of a negative focal power first lens L1, a negative focal power second lens L2, a positive focal power third lens L3 and a positive focal power fourth lens L4, wherein the negative focal power first lens L1 is a meniscus lens, the negative focal power second lens L2 is a biconcave lens, the positive focal power third lens L3 is a meniscus lens, and the positive focal power fourth lens L4 is a meniscus lens;
the positive focal power rear lens group A02 consists of a positive focal power fifth lens L5, a negative focal power sixth lens L6 and a positive focal power seventh lens L7, wherein the positive focal power fifth lens L5 is a double-convex lens, the negative focal power sixth lens L6 is a meniscus lens, the positive focal power seventh lens L7 is a double-convex lens, and the positive focal power fifth lens L5 and the negative focal power sixth lens L6 form a positive focal power cemented lens group B01;
the aperture STOP STOP is positioned between the positive power front lens group A01 and the positive power rear lens group A02, and the optical filter is positioned between the positive power rear lens group A02 and an image surface;
the distance from the vertex of the back surface of the negative power first lens L1 to the vertex of the front surface of the negative power second lens L2 is 2.73-2.83 mm;
the distance from the vertex of the rear surface of the negative focal power second lens L2 to the vertex of the front surface of the positive focal power third lens L3 is 0.77-0.87 mm;
the distance from the vertex of the rear surface of the positive focal power third lens L3 to the vertex of the front surface of the positive focal power fourth lens L4 is 0.04-0.14 mm;
the distance from the vertex of the rear surface of the positive focal power fourth lens L4 to the vertex of the surface of the positive focal power cemented lens group B01 is 3.1-3.2 mm;
the distance from the vertex of the rear surface of the positive focal power cemented lens group B01 to the vertex of the front surface of the positive focal power seventh lens L7 is 0.24-0.34 mm.
Further, the distance from the vertex of the rear surface of the negative power first lens L1 to the vertex of the front surface of the negative power second lens L2 is 2.78 mm.
The distance from the vertex of the back surface of the negative-power second lens L2 to the vertex of the front surface of the positive-power third lens L3 is 0.82 mm.
The distance from the vertex of the back surface of the positive power third lens L3 to the vertex of the front surface of the positive power fourth lens L4 is 0.09 mm.
The distance from the vertex of the rear surface of the positive power fourth lens L4 to the vertex of the surface of the positive power cemented lens group B01 is 3.13 mm.
The distance from the vertex of the rear surface of the positive power cemented lens group B01 to the vertex of the front surface of the positive power seventh lens L7 is 0.29 mm.
The invention has the beneficial effects that: according to the large-aperture high-definition vehicle-mounted lens for target identification, which is designed according to the scheme, the near-distance target can be identified, and the recognition capability of the automatic driving automobile on the near-distance target is improved by matching with other vehicle-mounted radars. The vehicle-mounted camera system for identifying the targets has the advantages of large lens angle, large aperture and higher resolution, can clearly identify the targets in a large-range and low-illumination environment, can early warn the targets in front of the vehicle in advance, is short in total length, and is particularly suitable for vehicle-mounted camera systems for identifying the targets.
Drawings
The structure and features of the invention will be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of light transmission according to an embodiment of the invention.
FIG. 3 is a schematic diagram of MTF (modulation transfer function) of an embodiment of the present invention.
FIG. 4 is a field curvature diagram according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of distortion of an embodiment of the present invention.
FIG. 6 is a schematic diagram of a dot-column diagram according to an embodiment of the present invention.
In fig. 1, 8 is the filter, 9 is the image plane.
Detailed Description
Referring to fig. 1-6, which are an embodiment of the present invention, a large-aperture high-definition onboard lens for object recognition is disclosed, which comprises, in order from an object side to an image side, a positive power front lens group a01, an aperture STOP, a positive power rear lens group a02, a filter 8, and an image plane 9;
the positive focal power front lens group A01 consists of a negative focal power first lens L1, a negative focal power second lens L2, a positive focal power third lens L3 and a positive focal power fourth lens L4, wherein the negative focal power first lens L1 is a meniscus lens, the negative focal power second lens L2 is a biconcave lens, the positive focal power third lens L3 is a meniscus lens, and the positive focal power fourth lens L4 is a meniscus lens;
the positive focal power rear lens group A02 consists of a positive focal power fifth lens L5, a negative focal power sixth lens L6 and a positive focal power seventh lens L7, wherein the positive focal power fifth lens L5 is a double-convex lens, the negative focal power sixth lens L6 is a meniscus lens, the positive focal power seventh lens L7 is a double-convex lens, and the positive focal power fifth lens L5 and the negative focal power sixth lens L6 form a positive focal power cemented lens group B01;
the aperture STOP STOP is positioned between the positive power front lens group A01 and the positive power rear lens group A02, and the optical filter is positioned between the positive power rear lens group A02 and an image surface;
the distance from the vertex of the back surface of the negative power first lens L1 to the vertex of the front surface of the negative power second lens L2 is 2.78 mm;
the distance from the vertex of the back surface of the negative-power second lens L2 to the vertex of the front surface of the positive-power third lens L3 is 0.82 mm;
the distance from the vertex of the back surface of the positive focal power third lens L3 to the vertex of the front surface of the positive focal power fourth lens L4 is 0.09 mm;
the distance from the vertex of the rear surface of the positive focal power fourth lens L4 to the vertex of the surface of the positive focal power cemented lens group B01 is 3.13 mm;
the distance from the vertex of the rear surface of the positive power cemented lens group B01 to the vertex of the front surface of the positive power seventh lens L7 is 0.29 mm.
The relevant parameters of the lenses are as follows:
the preferred values of the above-mentioned lens-related parameters are as follows:
referring to fig. 2, a light ray conduction diagram of the embodiment of the invention shows that the total length of the system is less than 21.1mm, and the system is very suitable for a vehicle-mounted camera system.
Referring to fig. 3, MTF (modulation transfer function) curves of the embodiment of the present invention are shown, wherein the abscissa represents spatial frequency in units: line pair/millimeter (lp/mm), the ordinate represents the MTF value. As can be seen from the figure, the concentration ratio of the MTF curve in the embodiment is relatively high, which shows that the technical scheme of the embodiment has excellent imaging consistency on the whole image plane, a high-definition image can be obtained on the whole image plane, and at 167lp/mm, all the MTF values in the field of view are greater than 36%.
Fig. 4 is a schematic view of the curvature of field of the embodiment of the present invention, in which the abscissa represents the distance between T and S of the same color and the magnitude of astigmatism, and the ordinate represents the field of view. As can be seen from fig. 4, the field curvature is effectively controlled in the present embodiment.
Referring to fig. 5, a distortion diagram of the present invention is shown, wherein the abscissa represents the distortion percentage and the ordinate represents the field of view range. As can be seen from fig. 5, the distortion in the entire image plane is at most-43%.
FIG. 6 is a schematic diagram of a dot-column diagram according to an embodiment of the present invention. As can be seen from fig. 6, the imaging points in each field almost converge to an ideal point, indicating that the present embodiment has good imaging performance.
The above-described embodiments are only some of the embodiments of the present invention, and the concept and scope of the present invention are not limited to the details of the above-described exemplary embodiments. Therefore, various modifications and improvements made by others skilled in the art according to the technical solutions of the present invention without departing from the design concept of the present invention shall fall within the protection scope of the present invention, and the protection content of the present invention is fully set forth in the claims.
Claims (8)
1. The utility model provides a large light ring high definition vehicle-mounted lens for target identification which characterized in that: the lens comprises a positive focal power front lens group A01, an aperture STOP STOP, a positive focal power rear lens group A02, an optical filter and an image plane in sequence from an object space to an image space;
the positive focal power front lens group A01 consists of a negative focal power first lens L1, a negative focal power second lens L2, a positive focal power third lens L3 and a positive focal power fourth lens L4, wherein the negative focal power first lens L1 is a meniscus lens, the negative focal power second lens L2 is a biconcave lens, the positive focal power third lens L3 is a meniscus lens, and the positive focal power fourth lens L4 is a meniscus lens;
the positive focal power rear lens group A02 consists of a positive focal power fifth lens L5, a negative focal power sixth lens L6 and a positive focal power seventh lens L7, wherein the positive focal power fifth lens L5 is a double-convex lens, the negative focal power sixth lens L6 is a meniscus lens, the positive focal power seventh lens L7 is a double-convex lens, and the positive focal power fifth lens L5 and the negative focal power sixth lens L6 form a positive focal power cemented lens group B01;
the aperture STOP STOP is positioned between the positive power front lens group A01 and the positive power rear lens group A02, and the optical filter is positioned between the positive power rear lens group A02 and an image surface;
the distance from the vertex of the back surface of the negative power first lens L1 to the vertex of the front surface of the negative power second lens L2 is 2.73-2.83 mm;
the distance from the vertex of the rear surface of the negative focal power second lens L2 to the vertex of the front surface of the positive focal power third lens L3 is 0.77-0.87 mm;
the distance from the vertex of the rear surface of the positive focal power third lens L3 to the vertex of the front surface of the positive focal power fourth lens L4 is 0.04-0.14 mm;
the distance from the vertex of the rear surface of the positive focal power fourth lens L4 to the vertex of the surface of the positive focal power cemented lens group B01 is 3.1-3.2 mm;
the distance from the vertex of the rear surface of the positive focal power cemented lens group B01 to the vertex of the front surface of the positive focal power seventh lens L7 is 0.24-0.34 mm.
2. The large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the relevant parameters of the negative power first lens L1, the negative power second lens L2, the positive power third lens L3, the positive power fourth lens L4, the positive power fifth lens L5, the negative power sixth lens L6 and the positive power seventh lens L7 are as follows:
3. the large-aperture high-definition vehicle-mounted lens for target recognition according to claim 2, characterized in that: the relevant parameters of the negative power first lens L1, the negative power second lens L2, the positive power third lens L3, the positive power fourth lens L4, the positive power fifth lens L5, the negative power sixth lens L6 and the positive power seventh lens L7 are as follows:
4. the large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the distance from the vertex of the back surface of the negative power first lens L1 to the vertex of the front surface of the negative power second lens L2 is 2.78 mm.
5. The large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the distance from the vertex of the back surface of the negative-power second lens L2 to the vertex of the front surface of the positive-power third lens L3 is 0.82 mm.
6. The large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the distance from the vertex of the back surface of the positive power third lens L3 to the vertex of the front surface of the positive power fourth lens L4 is 0.09 mm.
7. The large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the distance from the vertex of the rear surface of the positive power fourth lens L4 to the vertex of the surface of the positive power cemented lens group B01 is 3.13 mm.
8. The large-aperture high-definition vehicle-mounted lens for target recognition according to claim 1, characterized in that: the distance from the vertex of the rear surface of the positive power cemented lens group B01 to the vertex of the front surface of the positive power seventh lens L7 is 0.29 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110355764.2A CN113109922B (en) | 2021-04-01 | 2021-04-01 | Large-aperture high-definition vehicle-mounted lens for target identification |
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| CN202110355764.2A CN113109922B (en) | 2021-04-01 | 2021-04-01 | Large-aperture high-definition vehicle-mounted lens for target identification |
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| CN113109922B CN113109922B (en) | 2024-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137692A (en) * | 2021-11-04 | 2022-03-04 | 南阳利达光电有限公司 | Projecting lens for head-up display |
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| JP2018159898A (en) * | 2017-03-24 | 2018-10-11 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| US20200257079A1 (en) * | 2018-11-16 | 2020-08-13 | Jiangxi Lianchuang Electronic Co., Ltd. | Optical lens, imaging module and vehicle camera |
| CN214895981U (en) * | 2021-04-01 | 2021-11-26 | 南阳利达光电有限公司 | Large-aperture high-definition vehicle-mounted lens for target identification |
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- 2021-04-01 CN CN202110355764.2A patent/CN113109922B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016133599A (en) * | 2015-01-19 | 2016-07-25 | 株式会社リコー | Imaging lens and image capturing device |
| JP2018159898A (en) * | 2017-03-24 | 2018-10-11 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| CN107193111A (en) * | 2017-07-24 | 2017-09-22 | 广东弘景光电科技股份有限公司 | High pixel fish eye optical systems and its camera module of application |
| CN207123648U (en) * | 2017-09-15 | 2018-03-20 | 东莞市宇瞳光学科技股份有限公司 | Inexpensive large aperture 4MP is without thermalization tight shot |
| US20200257079A1 (en) * | 2018-11-16 | 2020-08-13 | Jiangxi Lianchuang Electronic Co., Ltd. | Optical lens, imaging module and vehicle camera |
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