CN214409424U - Vehicle-mounted front-view lens - Google Patents
Vehicle-mounted front-view lens Download PDFInfo
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- CN214409424U CN214409424U CN202022503607.5U CN202022503607U CN214409424U CN 214409424 U CN214409424 U CN 214409424U CN 202022503607 U CN202022503607 U CN 202022503607U CN 214409424 U CN214409424 U CN 214409424U
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Abstract
The utility model provides an on-vehicle foresight camera lens, it has overcome the not enough of prior art for the camera lens possesses high resolution, big light ring, big pixel. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a parallel flat plate and an image plane IMA in sequence from an object side surface to an image side surface along an optical axis; the first lens has positive focal power, specifically is a first meniscus positive lens, and the object side surface of the first lens is a concave surface; the second lens has positive focal power, specifically is a second meniscus positive lens, and has a convex object-side surface and a concave image-side surface; the third lens has negative focal power, specifically is a third biconcave negative lens, and has a concave object-side surface and a concave image-side surface; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface while the image side surface of the sixth lens is a concave surface.
Description
Technical Field
The utility model relates to a technical field of camera lens structure specifically is an on-vehicle foresight camera lens.
Background
In recent years, with the development of vehicle-mounted technology, there has been an increasing demand for forward-looking cameras, automatic cruise cameras, automobile data recorders, and vehicle-mounted cameras. The front-view vehicle-mounted lens is an important component in an advanced driver assistance system, and a driver can find out obstacles in front of the vehicle through the front-view vehicle-mounted lens, so that driving accidents are avoided.
However, the image captured by the existing forward-looking camera lens has low resolution and small field depth range, and cannot be captured in a low-illumination environment while presenting remote details, so that a driving assistance system cannot accurately judge the environmental information in front of the vehicle in real time to make timely early warning or avoidance, and a driving risk exists.
Disclosure of Invention
To the above problem, the utility model provides an on-vehicle foresight camera lens, it has overcome prior art's not enough for the camera lens possesses high resolution, big light ring, big pixel.
An on-vehicle foresight lens, characterized in that: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a parallel flat plate and an image plane IMA in sequence from an object side surface to an image side surface along an optical axis;
the first lens has positive focal power, specifically is a first meniscus positive lens, and the object side surface of the first lens is a concave surface;
the second lens has positive focal power, specifically is a second meniscus positive lens, and has a convex object-side surface and a concave image-side surface;
the third lens has negative focal power, specifically is a third biconcave negative lens, and has a concave object-side surface and a concave image-side surface;
the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface;
the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface;
the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface while the image side surface of the sixth lens is a concave surface.
It is further characterized in that:
the image side surface of the first lens is a concave surface or a convex surface;
the fifth lens and the sixth lens are combined to form a cemented lens;
the fifth lens and the sixth lens are separated lenses;
the image side surface of the fourth lens is a concave surface or a convex surface;
the difference between the shellfish numbers V1 and V2 of at least two adjacent lenses in the six lenses satisfies the following condition: 10 < | V1-V2| < 40;
BFL is the distance from the center of the image side surface of the sixth lens to the imaging surface of the vehicle-mounted forward-looking lens on the optical axis, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the vehicle-mounted forward-looking lens on the optical axis, and the whole lens meets the conditions that: BFL/TTL is less than or equal to 0.3;
the FOV is the maximum field angle of the vehicle-mounted forward-looking lens, D is the maximum light-passing caliber of the object-side surface of the first lens corresponding to the maximum field angle of the vehicle-mounted forward-looking lens, h is the half-image height corresponding to the maximum field angle of the vehicle-mounted forward-looking lens, and the whole lens meets the conditions that: (FOV/h)/D is less than or equal to 0.65;
the maximum view field angle FOV of the vehicle-mounted forward-looking lens, the whole group of focal length values F of the vehicle-mounted forward-looking lens and the half-image height h corresponding to the maximum view field angle of the vehicle-mounted forward-looking lens meet the following conditions: (FOV multiplied by F)/h is not less than 55;
the whole lens meets the conditions: TTL/F is less than or equal to 2;
f1, f2, f3, f4, f5 and f6 which are focal lengths of the first lens to the sixth lens in sequence, and the whole lens meets the conditions that: F1/F is more than or equal to 2 and less than or equal to infinity, F2/F is more than or equal to 0.3 and less than or equal to 5, F3/F is more than or equal to 20 and less than or equal to-0.4, F4/F is more than or equal to 0.2 and less than or equal to 1.5, F5/F is more than or equal to 0.5 and less than or equal to 0.8, and F6/F is more than or equal to 3 and less than or equal to 0.
The utility model discloses a six lenses, first lens have positive focal power, specifically be first falcate positive lens, its object side is the concave surface, the second lens has positive focal power, specifically be second falcate positive lens, its object side is the convex surface, the image side is the concave surface, the third lens has negative focal power, specifically be third biconcave negative lens, its object side is the concave surface, the image side is the concave surface, six glass sphere lens combinations form whole camera lens, a structure is simple, small, can realize at-40 to 125 within ranges clear formation of image, the temperature drift is little, satisfy 200 ten thousand pixel imaging requirements, the light ring is big, can shoot the field of view scope and be 38.
Drawings
Fig. 1 is a schematic structural diagram of a lens of the present invention;
fig. 2 is a MTF graph of an embodiment of the present invention;
fig. 3 is a graph illustrating an illuminance curve of an imaging lens according to an embodiment of the present invention.
Fig. 4 is a color difference chart according to an embodiment of the present invention.
Detailed Description
An onboard front view lens, see fig. 1: the lens comprises a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, a fifth lens 6, a sixth lens 7, a parallel flat plate 8 and an image plane IMA9 from the object side surface to the image side surface along the optical axis in sequence;
the first lens 1 has positive focal power, specifically is a first meniscus positive lens, and the object side surface thereof is a concave surface;
the second lens 2 has positive focal power, specifically is a second meniscus positive lens, and has a convex object-side surface and a concave image-side surface;
the third lens 4 has negative focal power, specifically is a third biconcave negative lens, and has a concave object-side surface and a concave image-side surface;
the fourth lens 5 has positive focal power, and the object side surface of the fourth lens is a convex surface;
the fifth lens 6 has positive focal power, and the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface;
the sixth lens element 7 has a negative refractive power, and has a concave object-side surface and a concave image-side surface.
The image side surface S2 of the first lens element 1 is concave or convex;
the fifth lens 6 and the sixth lens 7 are combined to form a cemented lens;
the fifth lens 6 and the sixth lens 7 are split lenses;
the image side surface of the fourth lens 5 is a concave surface or a convex surface;
the difference between the shellfish numbers V1 and V2 of at least two adjacent lenses in the six lenses satisfies the following condition: 10 < | V1-V2| < 40;
BFL is the distance on the optical axis from the center of the image side surface of the sixth lens 7 to the imaging surface of the vehicle-mounted forward looking lens, TTL is the distance on the optical axis from the center of the object side surface of the first lens 1 to the imaging surface of the vehicle-mounted forward looking lens, and the whole lens meets the conditions: BFL/TTL is less than or equal to 0.3;
the FOV is the maximum field angle of the vehicle-mounted front-view lens, D is the maximum light-passing caliber of the object side surface of the first lens 1 corresponding to the maximum field angle of the vehicle-mounted front-view lens, h is the half-image height corresponding to the maximum field angle of the vehicle-mounted front-view lens, and the whole lens meets the conditions that: (FOV/h)/D is less than or equal to 0.65;
the maximum view field angle FOV of the vehicle-mounted forward-looking lens, the whole group of focal length values F of the vehicle-mounted forward-looking lens and the half-image height h corresponding to the maximum view field angle of the vehicle-mounted forward-looking lens meet the following requirements: (FOV multiplied by F)/h is not less than 55;
the whole lens meets the conditions: TTL/F is less than or equal to 2;
f1, f2, f3, f4, f5 and f6 which are focal lengths of the first lens to the sixth lens in sequence, and the whole lens meets the conditions that: F1/F is more than or equal to 2 and less than or equal to infinity, F2/F is more than or equal to 0.3 and less than or equal to 5, F3/F is more than or equal to 20 and less than or equal to-0.4, F4/F is more than or equal to 0.2 and less than or equal to 1.5, F5/F is more than or equal to 0.5 and less than or equal to 0.8, and F6/F is more than or equal to 3 and less than or equal to 0.
In a specific embodiment, the parameters of each lens are shown in table 1:
TABLE 1
TABLE 1
When the radii of curvature of the surfaces of the diaphragm 3, the parallel plate 8 and the image plane IMA9 in table 1 are Infinity, this surface is represented as a plane.
The diaphragm 3 is arranged between the second lens 2 and the third lens 4, the fifth lens 6 and the sixth lens 7 are combined to form a cemented lens, the surface formed by the cemented lens is S11, the image side surface of the cemented combined lens is sequentially provided with a parallel flat plate 8 and an image surface IMA9, and the parallel flat plate 8 is specifically protective glass.
In the specific embodiment, the ratio of the parameters of the lens is shown in table 2:
| item | TTL/F | FOV×F/h | (FOV/h)/D | BFL/TTL |
| Range | ≤2 | ≥55 | ≤0.65 | ≤0.3 |
TABLE 2
The six glass spherical lenses are combined to form the integral lens, the structure is simple, the size is small, clear imaging in a range from-40 degrees to 125 degrees can be realized, temperature drift is small, the imaging requirement of 200 ten thousand pixels is met, the aperture is large, and the range of a shooting field of view is 38 degrees.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. An on-vehicle foresight lens, characterized in that: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a parallel flat plate and an image plane IMA in sequence from an object side surface to an image side surface along an optical axis;
the first lens has positive focal power, specifically is a first meniscus positive lens, and the object side surface of the first lens is a concave surface;
the second lens has positive focal power, specifically is a second meniscus positive lens, and has a convex object-side surface and a concave image-side surface;
the third lens has negative focal power, specifically is a third biconcave negative lens, and has a concave object-side surface and a concave image-side surface;
the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface;
the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface;
the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface while the image side surface of the sixth lens is a concave surface.
2. A vehicle-mounted forward-view lens as claimed in claim 1, wherein: the image side surface of the first lens is a concave surface or a convex surface.
3. A vehicle-mounted forward-view lens as claimed in claim 1, wherein: the fifth lens and the sixth lens are combined to form a cemented lens or a split lens.
4. A vehicle-mounted forward-view lens as claimed in claim 1, wherein: the image side surface of the fourth lens is a concave surface or a convex surface.
5. A vehicular front view lens according to claim 1, wherein the difference between the power V1 and the power V2 of at least two adjacent six lenses satisfies: 10 < | V1-V2| < 40.
6. The vehicle-mounted forward-view lens according to claim 1, wherein BFL is a distance on the optical axis from a center of an image-side surface of the sixth lens element to an imaging surface of the vehicle-mounted forward-view lens, and TTL is a distance on the optical axis from a center of an object-side surface of the first lens element to the imaging surface of the vehicle-mounted forward-view lens, and the entire lens satisfies the condition: BFL/TTL is less than or equal to 0.3.
7. The vehicle-mounted front-view lens according to claim 6, wherein FOV is a maximum field angle of the vehicle-mounted front-view lens, D is a maximum clear aperture of the object-side surface of the first lens corresponding to the maximum field angle of the vehicle-mounted front-view lens, h is a half-image height corresponding to the maximum field angle of the vehicle-mounted front-view lens, and the whole lens satisfies the following conditions: (FOV/h)/D is less than or equal to 0.65.
8. The vehicle-mounted front view lens according to claim 7, wherein the maximum field angle FOV of the vehicle-mounted front view lens, the entire group of focal length values F of the vehicle-mounted front view lens, and the half-image height h corresponding to the maximum field angle of the vehicle-mounted front view lens satisfy: (FOV XF)/h.gtoreq.55.
9. A vehicular front-view lens according to claim 8, wherein the whole lens satisfies the condition: TTL/F is less than or equal to 2.
10. A vehicular front view lens according to claim 8, wherein f1, f2, f3, f4, f5, f6 are focal lengths of the first lens to the sixth lens in this order, and the whole lens satisfies the following conditions: F1/F is more than or equal to 2 and less than or equal to infinity, F2/F is more than or equal to 0.3 and less than or equal to 5, F3/F is more than or equal to 20 and less than or equal to-0.4, F4/F is more than or equal to 0.2 and less than or equal to 1.5, F5/F is more than or equal to 0.5 and less than or equal to 0.8, and F6/F is more than or equal to 3 and less than or equal to 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022503607.5U CN214409424U (en) | 2020-11-03 | 2020-11-03 | Vehicle-mounted front-view lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022503607.5U CN214409424U (en) | 2020-11-03 | 2020-11-03 | Vehicle-mounted front-view lens |
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| CN214409424U true CN214409424U (en) | 2021-10-15 |
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| CN202022503607.5U Active CN214409424U (en) | 2020-11-03 | 2020-11-03 | Vehicle-mounted front-view lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180561A (en) * | 2020-11-03 | 2021-01-05 | 协益电子（苏州）有限公司 | Vehicle-mounted front-view lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180561A (en) * | 2020-11-03 | 2021-01-05 | 协益电子（苏州）有限公司 | Vehicle-mounted front-view lens |
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