CN219695551U - Vehicle-mounted front-shooting optical lens - Google Patents

Abstract

The utility model relates to a vehicle-mounted proactive optical lens, which comprises a diaphragm front group with negative focal power, a diaphragm and a diaphragm rear group with positive focal power, wherein the diaphragm front group consists of a first lens, a second lens and a third lens, the diaphragm rear group consists of a fourth lens, a fifth lens and a sixth lens, the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a meniscus positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a biconcave negative lens, the fourth lens is closely connected with the fifth lens to form a lens bonding group, the sixth lens is a meniscus positive lens, and the first lens, the second lens and the sixth lens are aspheric glass lenses. The vehicle-mounted front-shooting optical lens has the advantages of large field angle, small temperature drift in high and low temperature environments, good aberration characteristic, high image resolution, low cost and high cost performance; ultra-high resolution is achieved, with eight million pixels.

Description

Vehicle-mounted front-shooting optical lens

Technical Field

The utility model relates to the field of optical imaging lenses, in particular to a vehicle-mounted front-shooting optical lens.

Background

With the development of intelligent driving technology, a vehicle-mounted front-shooting lens becomes an indispensable component in modern automobiles. The vehicle-mounted front-view lens is a high-definition camera which is arranged at the front part or the roof of an automobile and is used for monitoring road and traffic conditions and providing real-time visual information for a driver. The vehicle-mounted front-shooting lens is one of core components of a modern intelligent driving auxiliary system, and can provide functions of automatic emergency braking, self-adaptive cruising, lane departure warning, blind spot monitoring and the like for a vehicle. The current vehicle-mounted lens has the defects of low resolution, narrow visual field, insufficient intellectualization and the like, and is difficult to provide high-quality driving assistance and safety guarantee for a driver.

Disclosure of Invention

Therefore, the utility model aims to provide the vehicle-mounted front-shooting optical lens which has a large field angle, high resolution, small temperature drift in high and low temperature environments and good imaging quality.

The utility model is realized by adopting the following scheme: the utility model provides a vehicle-mounted proactive optical lens, includes diaphragm front group, diaphragm and the diaphragm rear group that has positive focal power that has negative focal power, diaphragm front group comprises first lens, second lens, third lens, diaphragm rear group comprises fourth lens, fifth lens, sixth lens, first lens is meniscus negative lens, second lens meniscus negative lens, third lens meniscus positive lens, fourth lens is biconvex positive lens, fifth lens is biconcave negative lens, fourth lens and fifth lens close-fitting constitute lens cemented lens, sixth lens is meniscus positive lens.

Further, the first lens, the second lens and the sixth lens are aspheric glass lenses.

Further, the abbe number Vd1 of the first lens, the abbe number Vd2 of the second lens, the abbe number Vd3 of the third lens, the abbe number Vd4 of the fourth lens, the abbe number Vd5 of the fifth lens, and the abbe number Vd6 of the sixth lens satisfy the relation: vd1 is less than 50, vd2 is less than 50, vd3 is less than 50, vd4 is greater than 50, vd5 is less than 50, vd6 is less than 50.

Further, the refractive index Nd1 of the first lens, the refractive index Nd2 of the second lens, the refractive index Nd3 of the third lens, the refractive index Nd4 of the fourth lens, the refractive index Nd5 of the fifth lens, and the refractive index Nd6 of the sixth lens satisfy the relation: nd1>1.5, nd2>1.5, nd3>1.5, nd4>1.5, nd5>1.5, and Nd6>1.5.

Compared with the prior art, the utility model has the following beneficial effects: the vehicle-mounted front-shooting optical lens is novel in structure and unique in design, and can be obtained through six glass spherical surfaces and aspheric lenses, so that the optical lens with a large angle of view, small temperature drift in high and low temperature environments, good aberration characteristics and high image resolution is low in cost and high in cost performance; through reasonable parameter matching, the whole optical lens has enough image height and back working distance, ultra-high resolution is realized, and the pixels reach eight millions.

The present utility model will be further described in detail below with reference to specific embodiments and associated drawings for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

Drawings

Fig. 1 is an optical structural view (no light) of an embodiment of the present utility model;

FIG. 2 is an optical block diagram (with light) of an embodiment of the present utility model;

FIG. 3 is a graph of transfer functions for an embodiment of the present utility model;

FIG. 4 is a defocus MTF plot of an embodiment of the present utility model;

fig. 5 is a dot column diagram of an embodiment of the present utility model.

In the figure: l1-a first lens; l2-a second lens; l3-a third lens; STO-diaphragm; s4-a fourth lens; s5-a fifth lens; s6-a fifth lens; an IR-CUT-filter; IMG-image plane.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As shown in fig. 1-2, a vehicle-mounted front-shooting optical lens comprises a front diaphragm group with negative focal power, a diaphragm STO and a rear diaphragm group with positive focal power, wherein the front diaphragm group consists of a first lens L1, a second lens L2 and a third lens L3, the rear diaphragm group consists of a fourth lens L4, a fifth lens L5 and a sixth lens L6, the first lens is a meniscus negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens is a meniscus negative lens, the object side surface is a concave surface, and the image side surface is a convex surface; the third lens is a meniscus positive lens, the object side surface is a convex surface, and the image side surface is a concave surface; the fourth lens is a biconvex positive lens, the fifth lens is a biconcave negative lens, the fourth lens and the fifth lens are closely connected to form a lens bonding group, the sixth lens is a meniscus positive lens, the object side surface is a convex surface, the image side surface is a concave surface, and the six lenses are all made of glass.

The first lens L1 of the diaphragm front group has negative focal power, the second lens L2 has negative focal power, the matching can well expand light rays so as to increase the view field of the lens, the second lens L2 can increase the rear working distance of the lens, and the emergence angle of the light rays is reduced. The second lens L2 of the diaphragm front group is an aspheric glass lens, and can be changed into a spherical lens, so that the requirements of a processing technology are reduced.

In the implementation process, the third lens L3 can be a double-cemented lens, and the double-cemented lens can greatly correct the primary spherical aberration, the primary axial chromatic aberration and the like; the fourth lens L4 and the fifth lens L5 can divide the double-gluing opening into two independent lenses, so that the degree of freedom is increased, and the double-gluing opening lens has good correcting effect on off-axis aberration such as coma aberration, distortion and astigmatism of the lenses.

In this embodiment, the first lens, the second lens and the sixth lens are aspheric glass lenses.

The utility model has novel structure and unique design, the first lens L1, the second lens L2 and the sixth lens L6 are all formed into aspheric lenses, the third lens L3, the fourth lens L4 and the fifth lens L5 are matched, and meanwhile, the fourth lens 5 and the fifth lens 6 are glued by adopting a lens gluing process, so that the utility model has the characteristics of large field of view, small temperature drift in high and low temperature environments, good imaging quality and the like, and has low cost and extremely high cost performance. Through reasonable parameter matching, the whole optical lens has enough image height and back working distance, ultra-high resolution is realized, and the pixels reach eight millions.

In this embodiment, an optical filter IR-CUT is disposed between the second lens group and the image plane L9, and the optical filter IR-CUT can filter out noise light outside the designed wavelength band, thereby improving optical efficiency and realizing optimal imaging effect.

In the present embodiment, the abbe number Vd1 of the first lens, the abbe number Vd2 of the second lens, the abbe number Vd3 of the third lens, the abbe number Vd4 of the fourth lens, the abbe number Vd5 of the fifth lens, and the abbe number Vd6 of the sixth lens satisfy the relation: vd1 is less than 50, vd2 is less than 50, vd3 is less than 50, vd4 is greater than 50, vd5 is less than 50, vd6 is less than 50.

In this embodiment, the refractive index Nd1 of the first lens, the refractive index Nd2 of the second lens, the refractive index Nd3 of the third lens, the refractive index Nd4 of the fourth lens, the refractive index Nd5 of the fifth lens, and the refractive index Nd6 of the sixth lens satisfy the relation: nd1>1.5, nd2>1.5, nd3>1.5, nd4>1.5, nd5>1.5, and Nd6>1.5.

In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are all even aspherical lenses, and the surface shapes thereof satisfy the following equations:

，

h represents a radial coordinate value of the lens perpendicular to the optical axis, Z is a distance vector height from the aspherical vertex when the spherical lens is at a position with a height h along the optical axis direction, c=1/R, R represents a central curvature radius of the corresponding aspherical lens surface, k represents a conic coefficient, and the parameter A, B, C, D, E, F, G, H is a higher order aspherical coefficient.

The aspherical higher-order term coefficients are shown in the following table:

the optical parameters of the whole optical imaging lens are as follows:

the technical indexes of the optical lens are as follows:

(1) The paraxial working F number of the whole lens meets the following conditions: f# is more than or equal to 1.3 and less than or equal to 1.5; (2) the focal length f of the entire lens satisfies: f is more than or equal to 6mm and less than or equal to 7mm; (3) the optical total length TTL satisfies: TTL is more than or equal to 22 and less than or equal to 35mm, and the relation of TTL/f is more than or equal to 4.3 and less than or equal to 5.8.

Any of the above-described embodiments of the present utility model disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the utility model, and the numerical values listed above should not limit the protection scope of the utility model.

If the utility model discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).

In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.

Any part provided by the utility model can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims (3)

1. A vehicle-mounted proactive optical lens, characterized by: the lens assembly comprises a diaphragm front group with negative focal power, a diaphragm and a diaphragm rear group with positive focal power, wherein the diaphragm front group consists of a first lens, a second lens and a third lens, the diaphragm rear group consists of a fourth lens, a fifth lens and a sixth lens, the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a meniscus positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a biconcave negative lens, the fourth lens is closely connected with the fifth lens to form a lens bonding group, the sixth lens is a meniscus positive lens, and the first lens, the second lens and the sixth lens are aspheric glass lenses.

2. The on-vehicle proactive optical lens according to claim 1 wherein: the first lens 'abbe number Vd1, the second lens' abbe number Vd2, the third lens 'abbe number Vd3, the fourth lens' abbe number Vd4, the fifth lens 'abbe number Vd5, and the sixth lens' abbe number Vd6 satisfy the relation: vd1 is less than 50, vd2 is less than 50, vd3 is less than 50, vd4 is greater than 50, vd5 is less than 50, vd6 is less than 50.

3. The on-vehicle proactive optical lens according to claim 1 wherein: the refractive index Nd1 of the first lens, the refractive index Nd2 of the second lens, the refractive index Nd3 of the third lens, the refractive index Nd4 of the fourth lens, the refractive index Nd5 of the fifth lens, and the refractive index Nd6 of the sixth lens satisfy the relation: nd1>1.5, nd2>1.5, nd3>1.5, nd4>1.5, nd5>1.5, and Nd6>1.5.