CN-118818719-B - Low-distortion wide-angle high-resolution vehicle-mounted front-view optical system and camera module applied to same

CN118818719BCN 118818719 BCN118818719 BCN 118818719BCN-118818719-B

Abstract

The invention provides a low-distortion wide-angle high-resolution vehicle-mounted front-view optical system and an imaging module applied to the same, which mainly comprise 7 lenses, wherein the first lens has negative focal power, the image side surface of the first lens is concave, the second lens has negative focal power, the object side surface of the second lens is concave, the image side surface of the second lens is concave, the third lens has positive focal power, the object side surface of the third lens is convex, the image side surface of the third lens is convex, the fourth lens has positive focal power, the object side surface of the fourth lens is convex, the image side surface of the fifth lens is convex, the fifth lens has focal power, the sixth lens has focal power, the seventh lens has positive focal power, and the object side surface of the seventh lens is convex.

Inventors

DU LIANG
HUANG LINXIANG
YANG YING
LIU HONGHAI
Yang wenguan

Assignees

广东弘景光电科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20240806

Claims (3)

1. The utility model provides a on-vehicle forward-looking optical system of low distortion wide angle high resolution, is by first lens, second lens, third lens, fourth lens, diaphragm, fifth lens, sixth lens, seventh lens in proper order from the object plane to the image plane along the optical axis and constitutes its characterized in that: The object plane side of the first lens is a concave surface, the curvature radius is-500 mm, the image plane side is a concave surface, the curvature radius is 5.296mm, the focal power is negative, the thickness is 2.337mm, the refractive index is 1.88, and the distance from the first lens to the second lens is 3.077mm; the object plane side of the second lens is a concave surface, the curvature radius is-13.706 mm, the image plane side is a concave surface, the curvature radius is 17.382mm, the focal power is negative, the thickness is 2.454mm, the refractive index is 1.70, and the distance from the second lens to the third lens is 0mm; The object plane side of the third lens is a convex surface, the curvature radius is 17.382mm, the image plane side is a convex surface, the curvature radius is-12.184 mm, the focal power is positive, the thickness is 5.216mm, the refractive index is 1.88, and the distance from the third lens to the fourth lens is 1.223mm; the object plane side of the fourth lens is a convex surface, the curvature radius is 8.634mm, the image plane side is a convex surface, the curvature radius is-11.223 mm, the focal power is positive, the thickness is 3.906mm, the refractive index is 1.60, and the distance from the fourth lens to the diaphragm is 0.214mm; the object plane side of the fifth lens is a concave surface, the curvature radius is-27.15 mm, the image plane side is a concave surface, the curvature radius is 4.24mm, the focal power is negative, the thickness is 0.823mm, the refractive index is 1.75, the distance from the diaphragm to the fifth lens is 2.254mm, and the distance from the fifth lens to the sixth lens is 0mm; the object plane side of the sixth lens is a convex surface, the curvature radius is 4.24mm, the image plane side is a convex surface, the curvature radius is-7.863 mm, the focal power is positive, the thickness is 3.653mm, the refractive index is 1.60, and the distance from the sixth lens to the seventh lens is 0.137mm; The object plane side of the seventh lens is a convex surface, the curvature radius is 15.588mm, the image plane side is a concave surface, the curvature radius is 26.334mm, the focal power is positive, the thickness is 1.274mm, and the refractive index is 1.77; The optical system satisfies the following relationship: 0.42 < f/TTL*ImagH < 0.65; where f is the effective focal length of the optical system, TTL is the on-axis distance from the object side surface of the first lens element to the imaging surface, imagH is half the diagonal length of the effective pixel area on the imaging surface.
2. The vehicle-mounted front-view optical system with low distortion, wide angle and high resolution as set forth in claim 1, wherein the first lens, the second lens, the third lens, the fifth lens and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are glass aspheric lenses.
3. An image pickup module at least comprises an optical lens, and is characterized in that the low-distortion wide-angle high-resolution vehicle-mounted front-view optical system as set forth in any one of claims 1-2 is installed in the optical lens.

Description

Low-distortion wide-angle high-resolution vehicle-mounted front-view optical system and camera module applied to same Technical Field The application relates to the field of optical imaging, in particular to a low-distortion wide-angle high-resolution optical system applied to the field of vehicle-mounted front vision. Background With the rapid development of the imaging lens in the vehicle-mounted field, the requirements of people on the lens in the driving process are higher and higher, and the imaging lens not only needs to have wide vision, but also has higher definition. However, the current lens in the market has narrow visual field and low identification degree in the driving process, and cannot meet the higher requirements of users, and if the requirements of the users are met, the lens is required to have wide visual field, and meanwhile, in order to realize the high resolution of the lens, the visual field angle of an optical system is required to be increased, so that the lens has higher competitiveness in the market. Disclosure of Invention The application aims to provide a vehicle-mounted front-view optical system with low distortion, wide angle and high resolution, which has the advantages of low distortion, wide angle and high resolution, and meanwhile, the wide angle can increase the light inlet quantity of the optical system and the imaging quality. The low-distortion wide-angle high-resolution vehicle-mounted front-view optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object plane to an image plane along an optical axis; the first lens has negative focal power, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; The third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; The fifth lens has optical power; The sixth lens has optical power; The seventh lens has positive focal power, and the object side surface of the seventh lens is a convex surface. Preferably, the optical system satisfies the following relationship: 0.42<f/TTL*ImagH<0.65; where f is the effective focal length of the optical system, TTL is the on-axis distance from the object side surface of the first lens element to the imaging surface, imagH is half the diagonal length of the effective pixel area on the imaging surface. Preferably, the optical system satisfies the following relationship: -10.0<f1<-3.2; -15.0<f2<-4.1; 6.3<f3<12.8; 5.3<f4<15.0; -6.8<f5<8.5; -7.9<f6<8.5; 8.2<f7<50.0; Wherein f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. Preferably, the optical system satisfies the following relationship: -2.5<f1/f<0; -5.0<f2/f<-0.5; 2.0<f3/f<5.0; 1.3<f4/f<3.5; -3.8<f5/f<3.2; -3.1<f6/f<3.0; 1.2<f7/f<15.0; Wherein f is the focal length of the whole optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. Preferably, the refractive index Nd1 of the material of the first lens and the Abbe constant Vd1 of the material satisfy 1.65< Nd1<2.00,25< Vd1<60. Preferably, the refractive index Nd2 of the material and the Abbe number Vd2 of the second lens are 1.55< Nd2<1.80,30< Vd2<55. Preferably, the refractive index Nd3 and the Abbe number Vd3 of the material of the third lens are 1.60< Nd3<1.95,17.5< Vd3<55. Preferably, the material refractive index Nd4 and the material Abbe number Vd4 of the fourth lens are 1.44< Nd4<2.00,25< Vd4<95. Preferably, the refractive index Nd5 and the Abbe number Vd5 of the material of the fifth lens are 1.43< Nd5<2.00,17.5< Vd5<95. Preferably, the refractive index Nd6 of the material and the Abbe number Vd6 of the sixth lens are 1.43< Nd6<2.00,17.5< Vd6<95. Preferably, the seventh lens has a material refractive index Nd7 and a material Abbe number Vd7 of 1.49< Nd7<2.00,20< Vd7<82. Preferably, the first lens, the second lens, the third lens, the fifth lens and the sixth lens are spherical lenses, and the fourth lens and the seventh lens are glass aspheric lenses. On the other hand, the embodiment of the application also provides an image p