CN114719221A - Lens subassembly, car light module, car light and vehicle - Google Patents

Lens subassembly, car light module, car light and vehicle Download PDF

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Publication number
CN114719221A
CN114719221A CN202110013518.9A CN202110013518A CN114719221A CN 114719221 A CN114719221 A CN 114719221A CN 202110013518 A CN202110013518 A CN 202110013518A CN 114719221 A CN114719221 A CN 114719221A
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China
Prior art keywords
lens
light
light incident
plane
assembly according
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CN202110013518.9A
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Chinese (zh)
Inventor
牛磊
杨珏晶
黄慧
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HASCO Vision Technology Co Ltd
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HASCO Vision Technology Co Ltd
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Priority to CN202110013518.9A priority Critical patent/CN114719221A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The invention relates to an optical element and discloses a lens assembly which comprises a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence; the first lens is a concave lens, the second lens is a convex lens, and the lens light-emitting surface of the first lens is attached to the lens light-in surface of the second lens; the third lens and the fourth lens are all anamorphic lenses, the lens light-in surface of the third lens is a curved surface which is concave towards the lens light-out surface of the third lens, and the lens light-out surface of the third lens is a curved surface which is concave towards the lens light-in surface of the third lens; the lens light incident surface of the fourth lens is a curved surface protruding towards the lens light emergent surface of the third lens, so that the magnification of the lens component in a meridian plane is smaller than that in a sagittal plane. The invention also discloses a car lamp module, a car lamp and a car. The lens assembly can compress the visual angle in the up-down direction, can meet the illumination angle requirements of the road illumination in the horizontal direction and the vertical direction, and improves the illumination intensity in the effective illumination range.

Description

Lens subassembly, car light module, car light and vehicle
Technical Field
The present invention relates to optical elements, in particular, to a lens assembly. In addition, the invention also relates to a car lamp module, a car lamp and a car.
Background
With the development of the automobile lamp industry, the requirement of traffic participants on safe and comfortable illumination is difficult to meet by single road illumination, and the requirements of human-vehicle interaction and human-human interaction information are higher and higher. The novel intelligent car lamp system capable of realizing matrix type illumination and pixel display is gradually applied to the car.
The existing solution has a high-pixel MATRIX module scheme based on DLP or LCD, the resolution angle of the high-pixel MATRIX module scheme is very small, continuously-changing pixel illumination can be realized, softer light type change can be provided, different road conditions are combined, and high-pixel illumination and display are realized simultaneously. But the system has complex structure, large design and processing difficulty, strict requirements on an optical-mechanical-electrical system and high requirements on a control module. The two schemes have high cost, high price and large difficulty in mass production.
In addition, the technical scheme is that the illumination space of the whole headlamp is continuously divided into different blocks, and each block realizes pixel illumination and display by the array LEDs with different numbers. The technical scheme can control the cost to a certain extent. However, due to the limitation of the number of the array LEDs, the pixels of the final information display are limited, and the display resolution ratio is low. A part of the view angle in the vertical direction of the vehicle body is ineffective, resulting in a waste of energy and a low illuminance on the whole road surface.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a lens assembly, which can compress the viewing angle in the up-down direction, thereby satisfying the illumination angle requirements in the horizontal direction and the vertical direction of road illumination, and improving the illumination within the effective illumination range of the road surface.
The invention provides a vehicle lamp module, which can compress the viewing angle in the vertical direction, thereby reasonably and effectively utilizing the number of limited array LEDs or Micro-LEDs, meeting the requirements of the illumination angles in the horizontal direction and the vertical direction of road illumination and improving the illumination intensity in the effective illumination range of the road surface.
The third aspect of the present invention is to provide a vehicle lamp, which can compress the viewing angle in the vertical direction, so as to reasonably and effectively use the number of limited array LEDs or Micro-LEDs, meet the requirements of the illumination angles in the horizontal direction and the vertical direction of road illumination, and improve the illumination within the effective illumination range of the road surface.
The technical problem to be solved by the invention in the fourth aspect is to provide a vehicle, the vehicle lamp of which can compress the viewing angle in the up-down direction, thereby reasonably and effectively utilizing the number of limited array LEDs or Micro-LEDs, meeting the requirements of the illumination angles in the horizontal direction and the vertical direction of road illumination and improving the illumination intensity in the effective illumination range of the road surface.
In order to solve the above technical problem, a first aspect of the present invention provides a lens assembly, including a first lens, a second lens, a third lens and a fourth lens, which are sequentially disposed; the first lens is a concave lens, the second lens is a convex lens, and a lens light-emitting surface of the first lens is attached to a lens light-in surface of the second lens; the third lens and the fourth lens are both anamorphic lenses, the lens light incident surface of the third lens is a curved surface which is concave towards the lens light incident surface of the third lens, and the lens light incident surface of the third lens is a curved surface which is concave towards the lens light incident surface of the third lens; the lens light incident surface of the fourth lens is a curved surface protruding towards the lens light emergent surface of the third lens, so that the magnification of the combination of the first lens, the second lens, the third lens and the fourth lens in a meridian plane is smaller than that in a sagittal plane.
Preferably, the lens light incident surface and the lens light emergent surface of the first lens can be matched with a spherical surface; the lens light incident surface and the lens light emergent surface of the second lens are spherical surfaces.
Preferably, a lens light emitting surface of the fourth lens is a rotationally symmetric surface protruding outward of the fourth lens.
Preferably, a lens light-emitting surface of the third lens is a quadric surface or matched with an even aspheric surface; the light emitting surface of the fourth lens is a quadric surface or an even aspheric surface.
Preferably, a lens light-emitting surface of the third lens is matched with an even-order aspheric surface; the light emitting surface of the fourth lens is an even-order aspheric surface;
the surface type equation of the lens light-emitting surface of the third lens and the lens light-emitting surface of the fourth lens is as follows:
Figure BDA0002886072970000031
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of a quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
Preferably, the lens light incident surface of the third lens and the lens light incident surface of the fourth lens are both free-form surfaces;
the surface type equation of the lens light incident surface of the third lens and the lens light incident surface of the fourth lens is as follows:
Figure BDA0002886072970000032
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are aspheric high-order coefficient respectively.
More preferably, the first lens and the second lens are both glass molded pieces; the third lens and the fourth lens are both light-transmitting plastic molded parts.
In a second aspect, the present invention provides a vehicle lamp module, which includes a light source and the lens assembly according to any one of the above technical solutions, wherein the lens assembly is disposed in a light emitting direction of the light source.
In a third aspect, the present invention provides a vehicle lamp, which includes the vehicle lamp module set of the second aspect.
In a fourth aspect, the present invention provides a vehicle comprising the lamp of the third aspect.
According to the technical scheme, the lens assembly provided by the invention has the advantages that the first lens, the second lens, the third lens and the fourth lens are combined for use, the lens light incident surface of the third lens is set to be the curved surface which is concave towards the lens light emergent surface of the third lens, the lens light emergent surface of the third lens is set to be the curved surface which is concave towards the lens light incident surface of the third lens, and the lens light incident surface of the fourth lens is set to be the curved surface which is convex towards the lens light emergent surface of the third lens, so that the magnification of the combination of the first lens, the second lens, the third lens and the fourth lens in a meridian plane is smaller than that in a sagittal plane, the focal length of the lens module in the horizontal direction is larger than that in the vertical direction, and the horizontal direction field angle larger than that in the vertical direction can be obtained. For a fixed number of array LEDs or Micro-LEDs, the array LEDs or the Micro-LEDs can be compressed within a certain field angle, so that the resolution can be improved when the road is illuminated and displayed, excessive energy waste is avoided, and the road surface illumination is improved.
Further advantages of the present invention, as well as the technical effects of preferred embodiments, are further described in the following detailed description.
Drawings
FIG. 1 is a schematic structural view of one embodiment of the vehicular lamp of the present invention;
FIG. 2 is a schematic structural view of another embodiment of the vehicular lamp of the present invention;
FIG. 3 is a schematic view of a sagittal view of another embodiment of the vehicular lamp of the present invention;
FIG. 4 is a schematic view of a projection of another embodiment of the vehicular lamp of the present invention onto a meridian plane;
fig. 5 is a schematic view of the projection effect of one embodiment of the vehicle lamp of the invention.
Description of the reference numerals
1 first lens 2 second lens
3 third lens 4 fourth lens
5 light source 6 image plane
11 lens light incident surface of first lens 12 lens light emergent surface of first lens
21 lens light-in surface of second lens and 22 lens light-out surface of second lens
31 lens light-in surface of third lens, 32 lens light-out surface of third lens
41 lens entrance surface of fourth lens, 42 lens exit surface of fourth lens
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It is to be understood that the terms "upper," "lower," "front," "back," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus are not to be considered limiting of the present invention. As shown in fig. 1 and 5, the z-axis refers to the optical axis of the optical system, the y-axis refers to the principal ray of the off-axis object point (vertically upward), the straight line perpendicular to both the z-axis and the y-axis and passing through the origin is the x-axis, and the meridian plane refers to the plane formed by the principal ray of the off-axis object point and the principal axis of the optical system, that is, the plane formed by the z-axis and the y-axis; the sagittal plane refers to a plane perpendicular to the meridian plane, i.e., a plane formed by the x-axis and the z-axis. More specifically, the y-axis is directed "up", the z-axis is directed "front", and the x-axis is directed "right".
In a basic embodiment of the present invention, as shown in fig. 1, the present invention provides a lens assembly comprising a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in this order; the first lens 1 is a concave lens, the second lens 2 is a convex lens, and the lens light-emitting surface 12 of the first lens 1 is attached to the lens light-in surface 21 of the second lens 2; the third lens 3 and the fourth lens 4 are anamorphic lenses, the lens light incident surface 31 of the third lens 3 is a curved surface recessed toward the lens light incident surface 32 of the third lens 3, and the lens light incident surface 32 of the third lens 3 is a curved surface recessed toward the lens light incident surface 31 of the third lens 3; the lens entrance surface 41 of the fourth lens 4 is a curved surface that protrudes toward the lens exit surface 32 of the third lens 3, so that the magnification of the combination of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 in the meridian plane (y, z) can be made smaller than the magnification in the sagittal plane (x, z).
According to the present invention, the curvatures of the portions of the lens exit surface 12 of the first lens 1 and the curvatures of the portions of the lens entrance surface 21 of the second lens 2 are equal to each other in a one-to-one correspondence, so that the lens exit surface 12 of the first lens 1 and the lens entrance surface 21 of the second lens 2 are attached to each other. The first lens 1 and the second lens 2 can form an achromatic doublet or a double-split lens.
An anamorphic lens refers to a lens that is shaped differently from conventional convex lenses as well as concave lenses. Specifically, the anamorphic lens is a lens in which at least one of the lens light incident surface and the lens light exiting surface is a free-form surface. The lens light incident surface or the lens light emergent surface which is not set as the free curved surface can be set as an aspheric surface or a quadric surface. The free-form surface is a surface that is not rotationally symmetric about a center, and may be symmetric along a certain cross section, may be symmetric about a certain axis, or may have no axis or plane of symmetry.
Specifically, the lens light emitting surface 32 of the third lens 3 may be a rotational symmetry surface or a non-rotational symmetry surface, and preferably, for convenience of processing and fixing, the lens light emitting surface 32 of the third lens 3 is a rotational symmetry surface.
The lens assembly provided in the above-described basic embodiment can reduce the focal length in the horizontal direction by combining the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4, thereby obtaining a larger angle of view with respect to the vertical direction. Meanwhile, the focal length of the LED light source in the vertical direction can be increased, effective pixels in the vertical direction can be compressed in a certain view field, the resolution ratio during road illumination display can be improved, excessive energy waste is avoided, and the road surface illumination is improved. And the lens combination with different compression ratios can meet the visual requirements of meridian planes (y, z) and sagittal planes (x, z) of road illumination, and the illumination in the effective illumination range of the road surface is improved.
In one embodiment of the present invention, the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 can be matched with a spherical surface; the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are both spherical surfaces. The lens light incident surface 11 and the lens light emitting surface 12 of the first lens 1 and the lens light incident surface 21 and the lens light emitting surface 22 of the second lens 2 are all set to be spherical surfaces, so that the processing of the two lenses can be facilitated, and the first lens 1 and the second lens 2 can be attached more tightly on the basis of ensuring the magnification.
Specifically, both the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 can be attached to a spherical surface, that is, the curvatures of the lens light incident surface 11 and the lens light exiting surface 12 of the first lens 1 are consistent with the spherical surface.
In order to meet the appearance requirement of the vehicle lamp or the lens assembly, in an embodiment of the present invention, the lens light emitting surface 42 of the fourth lens 4 is a rotational symmetry plane protruding outward of the fourth lens 4.
The lens light-emitting surface 32 of the third lens 3 and the lens light-emitting surface 42 of the fourth lens 4 may be any curved surfaces that can form rotational symmetry. In an embodiment of the present invention, the lens light emitting surface 32 of the third lens element 3 is a quadric surface or matched with an even aspheric surface; the lens light emitting surface 42 of the fourth lens element 4 is a quadric surface or an even aspheric surface. The positioning position of the optical center can be further conveniently found when the third lens 3 and the fourth lens 4 are processed, so that the third lens 3 and the fourth lens 4 can be conveniently processed, and meanwhile, the installation of each lens in the lens component can be further facilitated.
Specifically, the lens light emitting surface 32 of the third lens element 3 is a quadric surface or can be attached to an even aspheric surface.
In order to further facilitate finding the positioning position of the optical center when the third lens 3 and the fourth lens 4 are processed, the processing of the third lens 3 and the fourth lens 4 is facilitated. In one embodiment of the present invention, as shown in fig. 3 and 4, the lens light emitting surface 32 of the third lens 3 is matched with an even aspheric surface; the lens light-emitting surface 42 of the fourth lens element 4 is an even-order aspheric surface;
the surface type equations of the lens light-emitting surface 32 of the third lens 3 and the lens light-emitting surface 42 of the fourth lens 4 are:
Figure BDA0002886072970000081
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of a quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8The coefficients of the high-order terms of the surface shapes are provided.
In order to further facilitate finding the positioning position of the optical center when the third lens 3 and the fourth lens 4 are processed, the processing of the third lens 3 and the fourth lens 4 is facilitated. In one embodiment of the present invention, as shown in fig. 3 and 4, the lens entrance surface 31 of the third lens 3 and the lens entrance surface 41 of the fourth lens 4 are both free-form surfaces;
the surface type equation of the lens entrance surface 31 of the third lens 3 and the lens entrance surface 41 of the fourth lens 4 is:
Figure BDA0002886072970000082
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of the quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are the coefficients of aspheric high-order terms respectively. Can facilitate the magnification of the lens component in the meridian plane (y, z) and the sagittal plane (x, z)And (4) controlling the rate.
In one embodiment of the present invention, the first lens 1 and the second lens 2 are both glass molded members; the third lens 3 and the fourth lens 4 are both light-transmitting plastic molded parts. The first lens 1 and the second lens 2 are close to the light source, and the glass molding piece is adopted, so that the influence of high temperature at the light source on the first lens 1 and the second lens 2 can be reduced. Third lens 3 and fourth lens 4 adopt printing opacity plastics formed part, can reduce the processing degree of difficulty and the processing cost when guaranteeing the face type degree of freedom, also can reduce the whole weight and the volume of lens subassembly simultaneously. The light transmissive plastic may be a conventional optical plastic such as polypropylene, polystyrene, polycarbonate, propylene-vinyl-acrylonitrile copolymer, or other optical plastic.
In a relatively preferred embodiment of the present invention, as shown in fig. 1-4, there is provided a lens assembly comprising a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4 arranged in sequence; the first lens 1 and the second lens 2 are both glass molded parts, and the third lens 3 and the fourth lens 4 are both light-transmitting plastic molded parts; the first lens 1 is a concave lens, the second lens 2 is a convex lens, the lens light incident surface 11 and the lens light emergent surface 12 of the first lens 1 can be matched with a spherical surface, the lens light incident surface 21 and the lens light emergent surface 22 of the second lens 2 are spherical surfaces, and the lens light emergent surface 12 of the first lens 1 is attached to the lens light incident surface 21 of the second lens 2; the third lens 3 and the fourth lens 4 are anamorphic lenses, the lens entrance surface 31 of the third lens 3 is a curved surface concave to the lens exit surface 32 of the third lens 3, the lens entrance surface 41 of the fourth lens 4 is a curved surface convex to the lens exit surface 32 of the third lens 3, so that the magnification of the combination of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 in the meridian plane (y, z) is smaller than the magnification in the sagittal plane (x, z), and the surface equation of the lens entrance surface 31 of the third lens 3 and the lens entrance surface 41 of the fourth lens 4 is:
Figure BDA0002886072970000091
wherein Z is a faceThe rise of the pattern, X and Y being the coordinates in the X and Y directions, respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients are quadric coefficients in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are high-order coefficient of aspheric surface respectively;
the lens light emitting surface 32 of the third lens 3 is a rotationally symmetric curved surface recessed toward the lens light incident surface 31 of the third lens 3, the lens light emitting surface 42 of the fourth lens 4 is a rotationally symmetric curved surface protruding outward of the fourth lens 4, and the surface type equations of the lens light emitting surface 32 of the third lens 3 and the lens light emitting surface 42 of the fourth lens 4 are:
Figure BDA0002886072970000101
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
The lens assembly provided by the above relatively preferred embodiment can compress the viewing angle in the vertical direction of the vehicle body to a certain extent by using the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 in a specific shape in combination, and can compress the light sources of a fixed number of array LEDs or Micro-LEDs within a certain viewing angle, so that the resolution can be improved when displaying road illumination, excessive energy waste is avoided, and the road illumination is improved. And the volume is less, reasonable in design, convenient to use, the practicality is strong.
In addition, the basic embodiment of the present invention further provides a car light module, as shown in fig. 1 to 4, the car light module includes a light source 5 and the lens assembly provided in the above embodiments, and the lens assembly is disposed in the light emitting direction of the light source 5. The light source 5 may be an array LED, Micro-LED or other light source capable of emitting a regular pattern.
The ratio of the length of the image plane 6 in the vertical direction to the length in the left-right direction formed by the vehicle lamp module provided in the above basic embodiment is smaller than the ratio of the length of the light source 5 in the vertical direction to the length in the left-right direction, as shown in fig. 1 and 5, in fig. 5, a is the image plane 6 formed by the light source 5 without passing through the lens assembly, and B is the image plane 6 formed by the light source 5 passing through the lens assembly.
As an embodiment of the present invention, as shown in fig. 2 to 4, parameters of each element in the lamp module are shown in table 1:
TABLE 1
Figure BDA0002886072970000111
The curvature corresponds to the curvature of each surface and is the reciprocal of the curvature radius. The pitch represents a center distance from the current surface to the next surface in the optical axis direction. The half-aperture is the effective half-aperture of the optical surface. The first lens 1 and the second lens 2 are double-cemented glass lenses, and the lens light-emitting surface 12 of the first lens 1 and the lens light-entering surface 21 of the second lens 2 are superposed and have the same surface type. The pitch in the lens exit surface 42 of the fourth lens 4 is the distance between the lens exit surface 42 and the image plane 6.
The lens light incident surface 11 and the lens light emergent surface 12 of the first lens 1 can be matched with a spherical surface; the second lens 2 is a convex lens, the lens light incident surface 21 and the lens light emergent surface 22 of the second lens 2 are both spherical surfaces, and the lens light emergent surface 12 of the first lens 1 is attached to the lens light incident surface 21 of the second lens 2;
the surface type equation of the lens entrance surface 31 of the third lens 3 and the lens entrance surface 41 of the fourth lens 4 is:
Figure BDA0002886072970000112
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyCoefficients of quadric surfaces in x-and y-directions, AR, BR, CR, DR, AP, BP, CP and DP, respectivelyHigh order term coefficients for the respective aspheric surfaces;
the above parameters are shown in table 2:
TABLE 2
Lens light incident surface 31 of third lens Lens light incident surface 41 of fourth lens
Curvature C in x-directionx(mm-1) 0.02186 0.01579
Curvature C in y-directiony(mm-1) 0.020501 0.03782
Coefficient of quadric k in x directionx -30.13066 -5.40398
Coefficient of quadric k in y-directiony -58.17834 -5.12610
Coefficient of higher order term AR -1.56921E-05 4.13771E-06
Coefficient of higher order term BR -1.28141E-07 -1.51474E-08
Coefficient of higher order term CR 4.90549E-10 1.83520E-11
High order coefficient DR -7.17566E-13 -9.04839E-15
High order term coefficient AP -0.20635 0.219275
Coefficient of higher order term BP -0.11335 0.24234
High order coefficient of term CP -0.10105 0.20592
Coefficient of higher order term DP -0.10967 -0.17859
The surface type equations of the lens light-emitting surface 32 of the third lens 3 and the lens light-emitting surface 42 of the fourth lens 4 are:
Figure BDA0002886072970000121
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of the quadric surface, r is the radial radius, alpha1、α2、α3、α4、α5、α6、α7、α8High-order term coefficients of the surface type respectively;
the above parameters are shown in table 3:
TABLE 3
Lens light-emitting surface 32 of the third lens Lens light-emitting surface 42 of fourth lens
Surface curvature c (mm)-1) 0.04652 0.02717
Coefficient of quadric surface k -3.19093 0.05713
Coefficient of higher order term alpha1 0.00000E+00 0.00000E+00
Coefficient of higher order term alpha2 -1.76031E-05 2.92887E-06
Coefficient of higher order term alpha3 -2.66865E-08 9.77352E-09
Coefficient of higher order term alpha4 1.33682E-10 -4.76685E-12
Coefficient of higher order term alpha5 -2.37578E-13 7.75394E-16
Coefficient of higher order term alpha6 1.71847E-16 3.41992E-18
Coefficient of higher order term alpha7 1.19737E-20 7.41520E-21
Coefficient of higher order term alpha8 -3.53637E-23 5.31334E-24
In the present embodiment, as shown in fig. 3, the light ray a emitted from the vertex 51 of the array LED is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 to be the outgoing light ray a. The light ray b emitted from the vertex 52 of the array LED is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 to be the emergent light ray b. The included angle between the emergent ray a and the emergent ray b in the sagittal plane is 7 degrees.
In the present embodiment, as shown in fig. 4, the light ray a emitted from the vertex 51 of the array LED is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 to be the outgoing light ray a. The light ray b emitted from the vertex 52 of the array LED is refracted by the surfaces of the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 to be the emergent light ray b. The included angle between the emergent ray a and the emergent ray b in the meridian plane is 5 degrees.
In the present embodiment, the focal length in the sagittal plane of the vehicle lamp is 33.37mm, and the focal length in the meridional plane is 45.65 mm. The magnification in the sagittal plane was 767.4, and the magnification in the meridional plane was 546.8. The emergent angle is 7 degrees multiplied by 5 degrees after passing through the system, and the compression ratio of the system is 1.4. The array LED is a Micro-LED of 32 × 32 pixels, and the pixel resolution in two directions is 0.21875 ° and 0.15625 °, respectively.
As shown in the attached figure 5, when the ratio of the sagittal plane to the meridional plane of the square array LED is 1:1 and the compression ratio of the square array LED after being projected by the lens assembly is 1:1.4, the lens assembly provided by the invention can also clearly image after compressing the object-image relation, the pixel resolution angle in the meridional direction is obviously improved, the compression ratio is 1.4, and the illumination of the image plane 6 is relatively improved by 1.4 times.
The embodiment of the invention also provides the car lamp, which comprises the car lamp module. The vehicle at least has the advantages of the vehicle lamp module, and the description is omitted.
Embodiments of the present invention also provide a vehicle including the lamp of the above embodiments. The vehicle at least has the advantages of the vehicle lamp, and the description is omitted.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (10)

1. A lens assembly, characterized by comprising a first lens (1), a second lens (2), a third lens (3) and a fourth lens (4) arranged in sequence;
the first lens (1) is a concave lens, the second lens (2) is a convex lens, and a lens light-emitting surface (12) of the first lens (1) is attached to a lens light-in surface (21) of the second lens (2);
the third lens (3) and the fourth lens (4) are anamorphic lenses, the lens light incident surface (31) of the third lens (3) is a curved surface which is concave towards the lens light incident surface (32) of the third lens (3), and the lens light incident surface (32) of the third lens (3) is a curved surface which is concave towards the lens light incident surface (31) of the third lens (3); the lens entrance surface (41) of the fourth lens (4) is a curved surface that is convex toward the lens exit surface (32) of the third lens (3) so as to enable the magnification of the combination of the first lens (1), the second lens (2), the third lens (3), and the fourth lens (4) in a meridian plane (y, z) to be smaller than the magnification in a sagittal plane (x, z).
2. A lens assembly according to claim 1, wherein the lens entrance face (11) and the lens exit face (12) of the first lens (1) are both capable of matching a spherical surface;
the lens light incident surface (21) and the lens light emergent surface (22) of the second lens (2) are both spherical surfaces.
3. A lens assembly according to claim 1, characterized in that the lens exit surface (42) of the fourth lens (4) is a rotationally symmetrical surface which is convex outwards of the fourth lens (4).
4. A lens assembly according to any one of claims 1-3, characterised in that the lens exit surface (32) of the third lens (3) is quadric or matched with an even-aspheric surface;
and the lens light-emitting surface (42) of the fourth lens (4) is a quadric surface or an even aspheric surface.
5. A lens assembly according to claim 4, characterized in that the lens exit surface (32) of the third lens (3) is matched with an even-order aspheric surface; the lens light-emitting surface (42) of the fourth lens (4) is an even-order aspheric surface;
the surface type equations of the lens light-emitting surface (32) of the third lens (3) and the lens light-emitting surface (42) of the fourth lens (4) are as follows:
Figure FDA0002886072960000021
wherein Z is the plane rise, c is the curvature of the surface, k is the coefficient of a quadric surface, r is the radial radius, and alpha1、α2、α3、α4、α5、α6、α7、α8Respectively, the coefficients of the high-order terms of the surface type.
6. A lens assembly according to any one of claims 1-3, characterised in that the lens entrance face (31) of the third lens (3) and the lens entrance face (41) of the fourth lens (4) are both free-form surfaces;
the surface type equation of the lens light incident surface (31) of the third lens (3) and the lens light incident surface (41) of the fourth lens (4) is as follows:
Figure FDA0002886072960000022
wherein Z is the rise of the plane, X and Y are the coordinates of the X direction and the Y direction respectively, CxAnd CyCurvature in the x-and y-directions, respectively, kxAnd kyThe coefficients of the quadric surfaces in the x direction and the y direction respectively, and AR, BR, CR, DR, AP, BP, CP and DP are the coefficients of aspheric high-order terms respectively.
7. A lens assembly according to any one of claims 1-3, characterised in that the first lens (1) and the second lens (2) are both glass mouldings;
the third lens (3) and the fourth lens (4) are both light-transmitting plastic molded parts.
8. A vehicle lamp module comprising a light source (5) and a lens assembly according to any one of claims 1-7, said lens assembly being arranged in the light exit direction of said light source (5).
9. A vehicular lamp comprising the vehicular lamp module according to claim 8.
10. A vehicle comprising the lamp of claim 9.
CN202110013518.9A 2021-01-06 2021-01-06 Lens subassembly, car light module, car light and vehicle Pending CN114719221A (en)

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Citations (10)

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Publication number Priority date Publication date Assignee Title
JPH06203608A (en) * 1992-12-25 1994-07-22 Koito Mfg Co Ltd Reflector for vehicle headlamp
JPH07140380A (en) * 1993-08-06 1995-06-02 Samsung Aerospace Ind Ltd Photographing-lens device
DE102008022010A1 (en) * 2008-05-02 2009-11-12 Michael Penczek Aspheric optical lens for spectacles comprises a front surface with x-components continuously changing in the x-direction and a rear surface with y-components likewise changing in the x-direction
KR20100013584A (en) * 2008-07-31 2010-02-10 한국광기술원 Asymmetric projection lens of the scanning optical system
US20100263709A1 (en) * 2009-04-15 2010-10-21 Richard Norman Systems for cost-effective concentration and utilization of solar energy
JP2011008034A (en) * 2009-06-25 2011-01-13 T & Ts:Kk Stereo viewer device
CN102419476A (en) * 2011-12-23 2012-04-18 苏州大学 Optimization method for reducing astigmatism of progressive additional lens
US20190203897A1 (en) * 2017-12-29 2019-07-04 Sl Corporation Optical system for vehicle and vehicle lamp using the same
CN111237712A (en) * 2020-02-28 2020-06-05 华域视觉科技(上海)有限公司 Vehicle lamp pixelization lighting display system and vehicle lamp
FR3106671A1 (en) * 2019-12-20 2021-07-30 Valeo Vision Light beam projection system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203608A (en) * 1992-12-25 1994-07-22 Koito Mfg Co Ltd Reflector for vehicle headlamp
JPH07140380A (en) * 1993-08-06 1995-06-02 Samsung Aerospace Ind Ltd Photographing-lens device
DE102008022010A1 (en) * 2008-05-02 2009-11-12 Michael Penczek Aspheric optical lens for spectacles comprises a front surface with x-components continuously changing in the x-direction and a rear surface with y-components likewise changing in the x-direction
KR20100013584A (en) * 2008-07-31 2010-02-10 한국광기술원 Asymmetric projection lens of the scanning optical system
US20100263709A1 (en) * 2009-04-15 2010-10-21 Richard Norman Systems for cost-effective concentration and utilization of solar energy
JP2011008034A (en) * 2009-06-25 2011-01-13 T & Ts:Kk Stereo viewer device
CN102419476A (en) * 2011-12-23 2012-04-18 苏州大学 Optimization method for reducing astigmatism of progressive additional lens
US20190203897A1 (en) * 2017-12-29 2019-07-04 Sl Corporation Optical system for vehicle and vehicle lamp using the same
FR3106671A1 (en) * 2019-12-20 2021-07-30 Valeo Vision Light beam projection system
CN111237712A (en) * 2020-02-28 2020-06-05 华域视觉科技(上海)有限公司 Vehicle lamp pixelization lighting display system and vehicle lamp

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