Automotive optical lenses, imaging equipment and automobiles

Abstract

The present invention discloses a vehicle-mounted optical lens, an imaging device, and a vehicle. The vehicle-mounted optical lens has an object side and an image side disposed opposite each other along an optical axis. The image side forms an image plane. The vehicle-mounted optical lens includes a plurality of lenses and an aperture. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens extending from the object side to the image side. One of the plurality of lenses is a glass aspherical lens, and the remaining lenses are glass spherical lenses. The aperture is disposed between the first lens and the second lens. The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together. The present invention aims to solve the problems of existing vehicle-mounted optical lenses, such as being bulky, heavy, and costly.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a vehicle-mounted optical lens, an imaging device, and a vehicle. Background Art

[0002] With the rapid development and widespread application of intelligent safety assisted driving monitoring systems, the requirements for ADAS (Advanced Driving Assistance System) are constantly increasing. Today's ADAS is constantly developing in the direction of miniaturization, low distortion, and strong temperature adaptability. Correspondingly, new architecture small-angle ADAS is in urgent need of research and development.

[0003] All existing small-angle automotive optical lenses on the market use glass aspherical structures, and the number of lenses is greater than two. Their specific disadvantages are large size, heavy weight and high cost. Summary of the Invention

[0004] The main purpose of the present invention is to provide a vehicle-mounted optical lens, an imaging device and a vehicle, aiming to solve the problems of large size, heavy weight and high cost of existing vehicle-mounted optical lenses.

[0005] To achieve the above-mentioned object, the present invention provides a vehicle-mounted optical lens having an object side and an image side disposed opposite to each other along an extension direction of an optical axis, wherein the image side forms an image plane, and the vehicle-mounted optical lens comprises:

[0006] a plurality of lenses, the plurality of lenses comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side, one of the plurality of lenses being a glass aspherical lens and the rest being glass spherical lenses; and

[0007] an aperture, disposed between the first lens and the second lens;

[0008] The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together.

[0009] Optionally, the fourth lens is a glass aspherical lens.

[0010] Optionally, a side surface of each lens close to the object side is set as an object side surface, and a side surface close to the image side is set as an image side surface;

[0011] The first lens has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0012] The second lens has negative optical power, and its object side surface is concave, and its image side surface is concave;

[0013] The third lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex;

[0014] The fourth lens has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0015] The fifth lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex;

[0016] The sixth lens has negative optical power, and its object-side surface and image-side surface are concave.

[0017] Optionally, the refractive index of the first lens is Nd1, Nd1≤2.00;

[0018] The refractive index of the second lens is Nd2, Nd2≤2, and the Abbe constant of the second lens is Vd2, Vd2≤50;

[0019] The refractive index of the third lens is Nd3, Nd3≤2.00, and the Abbe constant of the third lens is Vd3, Vd3≥50;

[0020] The refractive index of the fourth lens is Nd4, Nd4≤2;

[0021] The refractive index of the fifth lens is Nd5, Nd5≤2.00, and the Abbe constant of the fifth lens is Vd5, Vd5≥60;

[0022] The refractive index of the sixth lens is Nd6, Nd6≤2, and the Abbe constant of the sixth lens is Vd6, Vd6≤40.

[0023] Optionally, a distance from a center of a side surface of the sixth lens facing the image side to the image plane is BFL, and a distance from a center of a side surface of the first lens facing the object side to the image plane is TTL, wherein BFL / TTL>0.15.

[0024] Optionally, the maximum field of view of the vehicle-mounted optical lens is FOV, the image height corresponding to the maximum field of view is h, and the focal length of the vehicle-mounted optical lens is f, wherein 100.5≤(FOV×f) / h≤110.5.

[0025] Optionally, the vehicle-mounted optical lens further includes a filter, and the filter is arranged between the sixth lens and the image plane.

[0026] The present invention further provides an imaging device, comprising the vehicle-mounted optical lens, wherein the vehicle-mounted optical lens has an object side and an image side that are oppositely arranged along the extension direction of the optical axis, the image side forming an image plane, and the vehicle-mounted optical lens comprises:

[0027] a plurality of lenses, the plurality of lenses comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side, one of the plurality of lenses being a glass aspherical lens and the rest being glass spherical lenses; and

[0028] an aperture, disposed between the first lens and the second lens;

[0029] The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together.

[0030] The present invention further provides an automobile, comprising the imaging device, the imaging device comprising the vehicle-mounted optical lens, the vehicle-mounted optical lens having an object side and an image side disposed opposite to each other along an extension direction of an optical axis, the image side forming an image plane, and the vehicle-mounted optical lens comprising:

[0031] a plurality of lenses, the plurality of lenses comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side, one of the plurality of lenses being a glass aspherical lens and the rest being glass spherical lenses; and

[0032] an aperture, disposed between the first lens and the second lens;

[0033] The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together.

[0034] In the technical solution of the present invention, the vehicle-mounted optical lens includes multiple lenses and an aperture. The multiple lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Among the multiple lenses, one is a glass aspherical lens, and the others are glass spherical lenses. This reduces the number of glass spherical lenses used, and the aperture is disposed between the first lens and the second lens. The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together. This reduces the number of glass aspherical lenses in the vehicle-mounted optical lens, while ensuring that the combination of the multiple lenses still meets the requirements of high-quality imaging performance, making the lens more compact, cost-effective, and more competitive. In the technical solution of the present invention, the vehicle-mounted optical lens includes multiple lenses and an aperture. The multiple lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Among the multiple lenses, one is a glass aspherical lens, and the others are glass spherical lenses. This reduces the number of glass spherical lenses used, and the aperture is disposed between the first lens and the second lens. The second lens and the third lens are cemented together, and the fifth lens and the sixth lens are cemented together. This ensures that the number of glass aspherical lenses in the vehicle-mounted optical lens is reduced, and the combination of the multiple lenses meets the requirements of high-quality imaging performance, making the lens more compact, lower-cost, and more competitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 A schematic structural diagram of a first embodiment of the vehicle-mounted optical lens provided by the present invention;

[0037] Figure 2 for Figure 1 A distortion curve diagram of the first embodiment of the vehicle-mounted optical lens;

[0038] Figure 3 for Figure 1 An MTF curve diagram of the first embodiment of the vehicle-mounted optical lens.

[0039] Description of Figure Numbers:

[0040]

[0041] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] With the rapid development and widespread application of intelligent safety assisted driving monitoring systems, the requirements for ADAS (Advanced Driving Assistance System) are constantly increasing. Today's ADAS is constantly developing in the direction of miniaturization, low distortion, and strong temperature adaptability. Correspondingly, new architecture small-angle ADAS is in urgent need of research and development.

[0046] All existing small-angle automotive optical lenses on the market use glass aspherical structures, and the number of lenses is greater than two. Their specific disadvantages are large size, heavy weight and high cost.

[0047] In view of this, the present invention provides a vehicle-mounted optical lens, which is more compact, has lower cost, and is more competitive. Figures 1 to 3This is the first embodiment of the vehicle-mounted optical lens provided by the present invention.

[0048] Please refer to Figure 1 The vehicle-mounted optical lens 100 has an object side and an image side that are oppositely arranged along the extension direction of the optical axis, and the image side forms an image plane. The vehicle-mounted optical lens 100 includes multiple lenses and an aperture 2. The multiple lenses include a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15 and a sixth lens 16 from the object side to the image side. Among the multiple lenses, one is a glass aspherical lens, and the rest are glass spherical lenses; the aperture 2 is arranged between the first lens 11 and the second lens 12; wherein the second lens 12 and the third lens 13 are glued together, and the fifth lens 15 and the sixth lens 16 are glued together.

[0049] In the technical solution of the present invention, the vehicle-mounted optical lens 100 includes multiple lenses and an aperture 2. The multiple lenses include a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 from the object side to the image side. Among the multiple lenses, one is a glass aspherical lens, and the others are glass spherical lenses. This reduces the number of glass spherical lenses used, and the aperture 2 is disposed between the first lens 11 and the second lens 12. The second lens 12 and the third lens 13 are bonded together, and the fifth lens 15 and the sixth lens 16 are bonded together. This ensures that the number of glass aspherical lenses in the vehicle-mounted optical lens 100 is reduced, and the combination of the multiple lenses meets the requirements of high-quality imaging performance, making the lens more compact, cost-effective, and more competitive.

[0050] In this embodiment, the fourth lens 14 is a glass aspheric lens. By properly setting the position of the glass aspheric lens, better quality of effect can be achieved.

[0051] Specifically, in this embodiment, the side of each lens closest to the object side is set as the object side, and the side closest to the image side is set as the image side; the first lens 11 has positive optical power, its object side is convex, and its image side is concave; the second lens 12 has negative optical power, its object side is concave, and its image side is concave; the third lens 13 has positive optical power, its object side is convex, and its image side is convex; the fourth lens 14 has positive optical power, its object side is concave, and its image side is convex; the fifth lens 15 has positive optical power, its object side is convex, and its image side is convex; the sixth lens 16 has negative optical power, its object side is concave, and its image side is concave. In this way, the optical power of the vehicle-mounted optical lens 100 is reasonably distributed, and the chromatic aberrations between the multiple lenses are compensated for each other, ensuring high color reproduction and obtaining good imaging effects even in low-light environments.

[0052] In this embodiment, the refractive index of the first lens 11 is Nd1, Nd1≤2.00; the refractive index of the second lens 12 is Nd2, Nd2≤2, and the Abbe constant of the second lens 12 is Vd2, Vd2≤50; the refractive index of the third lens 13 is Nd3, Nd3≤2.00, and the Abbe constant of the third lens 13 is Vd3, Vd3≥50; the refractive index of the fourth lens 14 is Nd4, Nd4≤2; the refractive index of the fifth lens 15 is Nd5, Nd5≤2.00, and the Abbe constant of the fifth lens 15 is Vd5, Vd5≥60.

[0053] The refractive index of the sixth lens 16 is Nd6, where Nd6≤2, and the Abbe constant of the sixth lens 16 is Vd6, where Vd6≤40. By configuring the refractive indices and Abbe constants of the six lenses, the vehicle-mounted optical lens 100 has better high and low temperature protection and meets the requirements for distortion and chromatic aberration.

[0054] In this embodiment, the distance from the center of the side of the sixth lens 16 facing the image side to the image plane is BFL, and the distance from the center of the side of the first lens 11 facing the object side to the image plane is TTL, where BFL / TTL>0.15.

[0055] In this embodiment, the maximum field of view of the vehicle optical lens 100 is FOV, the image height corresponding to the maximum field of view is h, and the focal length of the vehicle optical lens 100 is f, wherein 100.5≤(FOV×f) / h≤110.5. In this way, the field of view requirement is met.

[0056] Specifically, the vehicle-mounted optical lens 100 further includes a filter 3, which is disposed between the sixth lens 16 and the image plane. The filter 3 can filter light to make the image softer and more distinct.

[0057] In the present invention, the vehicle-mounted optical lens 100 includes six lenses, among which one lens is set as a glass aspheric lens and the remaining five are set as glass lenses. By matching the reasonable optical focal length and surface shape of each lens and reasonably allocating parameters, the vehicle-mounted optical lens 100 is miniaturized, low-cost, and can achieve high-quality imaging.

[0058] Figure 2 is a distortion curve diagram of the vehicle-mounted optical lens 100 according to the first embodiment; Figure 3 FIG. 1 is an MTF curve diagram of the vehicle-mounted optical lens 100 according to the first embodiment.

[0059] Specifically, the lens types, curvature radii, thicknesses, and materials of the six lenses in the first embodiment are shown in Table 1, where the units of curvature radii and thicknesses are all in millimeters (mm). In Table 1, S1 to S12 are the surface numbers of the multiple lenses, R represents the curvature radius of each lens, D represents the thickness or air space of each lens, ND represents the d-light refractive index of the optical material used, and VD represents the d-light Abbe number of the optical material used. Table 2 lists the aspheric coefficients of all surfaces of the aspheric glass lens, where K is the quadratic surface coefficient of the aspheric surface, and A4 to A16 are the even-order aspheric coefficients.

[0060] Table 1

[0061]

[0062] Table 2

[0063]

[0064] The present invention also proposes an imaging device, including the vehicle-mounted optical lens 100 described in the above technical solution. It should be noted that the detailed structure of the optical lens in the imaging device can refer to the embodiment of the above-mentioned vehicle-mounted optical lens 100, and will not be repeated here; since the above-mentioned vehicle-mounted optical lens 100 is used in the imaging device of the present invention, the embodiments of the imaging device of the present invention include all technical solutions of all embodiments of the above-mentioned vehicle-mounted optical lens 100, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0065] In addition, the present invention also proposes a car, which includes the above-mentioned imaging device, and the above-mentioned imaging device includes the vehicle-mounted optical lens 100 described in the above-mentioned technical solution. It should be noted that the detailed structure of the vehicle-mounted optical lens 100 in the car can refer to the embodiment of the above-mentioned vehicle-mounted optical lens 100, which will not be repeated here; since the above-mentioned vehicle-mounted optical lens 100 is used in the car of the present invention, the embodiment of the car of the present invention includes all technical solutions of all embodiments of the above-mentioned vehicle-mounted optical lens 100, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle-mounted optical lens, characterized in that: The vehicle-mounted optical lens has an object side and an image side that are arranged opposite to each other along the extension direction of the optical axis, the image side forming an image plane, the vehicle-mounted optical lens including a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, and a sixth lens with negative focal power, which are arranged in sequence from the object side to the image side, a stop is provided between the first lens and the second lens, and a filter is provided between the sixth lens and the image plane; The second lens and the third lens are cemented together, the fifth lens and the sixth lens are cemented together, the number of lenses with optical power in the vehicle-mounted optical lens is six, the fourth lens is a glass aspherical lens, the first lens, the second lens, the third lens, the fifth lens, and the sixth lens are all glass spherical lenses, and the optical parameters of the vehicle-mounted optical lens are as follows: Wherein, S1 to S12 are the surface numbers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the filter.

2. An imaging device, characterized in that The invention comprises the vehicle-mounted optical lens as claimed in claim 1.

3. A car, characterized in that: Comprising the imaging device as claimed in claim 2.

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